Free Exhibits - District Court of Colorado - Colorado

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 1 of 13

Dec 14 1965
WELL Piled

VARNEY
DRILLING

3223183

Aug

Is

24

U2

Pt

shnAPrn7

PAS000I

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 2 of 13

Dec 14
WELL Filed 1963

VARNEY
DRILLING APPARATUS

3223183

Sheets-Sheet

to

-a

___A___

nrn4

I6rnpc

PAS000I

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 3 of 13

Dec 14

1965
WZLL

VARNEY

3223183

Piled

1963

SheetsSheet

PAS000I

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 4 of 13

Dec 14

1965
WELL

VARNEY
AYPARATUS

3223183

Filed

1963

SheetsSheet

ID

PASOcpOi

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 5 of 13

United

States Patent Office

3223183
Patented

Dec 14

1965

the

telescoping

Suitable
to

signal

means two

must

be

WELL DRILUNG
usth

3223183

Vanrey Los

APPARATUS Ave
300477

vided
tions

however
are
partially

indicate collapsed stream pressure of
drilling

telescoping

pro sec

43

The

downward

fluid

may

be

used
travel

Filed

Aug
21 Claims

for signaling rapidly to the
in

changes

deep

in the

surface the prior
art

advanced for
drilling drill string

heretofore This invention tbe
drilling drill relates to

such in response

by
to creat

apparatus

for

drilling relates at

deep to 10

restricting

stream action
rise

of in the

boreholes rotary

earth apparatus
in

more
rotated

particularly
drill

the telescoping ing pressure

the lower crushing

at not been

the

top

of of

end
action
lifting

string

for
fluid

cutting cooling

or the

Such
reasons

with the

circulating cuttings

out

of the
in

For which

purpose as
bit
is

One
sure

reason
too
bit

instances gradual at
is

is

the signaling detection

pres

of

the

present
in

disclosure

rise

accurate slow that

especially

embodied
rotated applied

such
drill

an

apparatus but
in

when found
rise is

progresses
art

rate the

Another
signaling

reason pressure the

by
to

the an

may
drill

also

be

systems

apparatus

which
lower end

unduly of

prolonged system

and
for

consequently the the range of
drilling signals relative

by
In posed

suitable

motor

on
bit

the

efficiency

conventional

rotary
is

drilling

practice by

the of
at

im
weight the top of

further

reason

encountered one
limit

are

on

the

judged

means
with the out

20

sociated

of

move
becomes the

indicator the the
driller

on

the brake

draw

works

regulated

ment
difficult

between

the

two

telescoping to guess

sections be signal

and
that

means
off

associated to thereby

drum
hoist the

for the

driller

when

slacking

pay

limit scoping 25

When
lower

the

driller

receives
fully

the

lower weight
drilling

the

string the
bit

increase the
drill

are the

nearly

may mad
the point
at

on

back
such weight as

string

vertently the the string

string

which on

reduce of for cause but turn
string

result

progressive weight

two

sections
If

am
not

fully
all

contracted the

impose

deepening the not the which
in drill

hole
excessive

Carrying of

too

much

on

of

fosrnation

given

may
damage to

only
drill in

wear
to

on and
result in

The
to both

present

invention with

meets

this

situation

by

providing approach

tends to Metal result the the

crooked bending of the the be to severely too
little stresses

signal system the

capability opposite
limits

cause

increased
failure

two

of

the

drill loints

lion

and

contraction
practice

two
of

telescoping the

of exten range sections In

or tool

may
of

Friction

the the similar
relating

two
other

signals

are

and
point even

the of
twist

may
string

and

are

distinguished

from and

each

simply
drill

to

wear
of

them

to the lowering of used feature character are avoided and to

of the

ott the

On
type

the

other in

imposing

In

the

preferred
signals

however
the

dif

weight

on

bit

results

low

rates

ferent
stressing

are

identify of the are

two

limits
Is

Modern and

roller

bits

depend of be

largely

on
the

An
of 40

important

invention provided

that prolonged

consequent

crushing therefore

formation

Adequate
bit it is

unmistakable
rises

and
signals

weight functson

must

by
for ton to
total

to

pressure
terized

by

employing

efficiently

and

as intended the half

abrupt the pulses choke passes

The optimum weight on may be anywhere between
is

any
and

given

conditions tons tons
drill drill string

instances pressure an
axial

substantial pressure are In the form of great

rises
relatively

In

some
short

but In

amplitude

created section and other

usually

in

the

range

of the

twenty-five weight of the

head through invention

is

earned ring

by
the

one

deep

however
exceed he
to

which
section be choke
is

choke teaches to

carried

by

the

may
must
the

tons

and

consequently for the

The by

may
through
the

under
keep favorable deep

tension

major
the on

distance

down

mounted
ring thus the produce

be moved
pressure sharp of tbe

from
the

overloading

the bit only be at 50

dynamic
distinctly

Under
moderately calculated the top able
is

drilling

conditions

where
imposed to the

and other ring

pressure enters ring abrupt

pulse the and and

In

the

may
indicator such

instances without passing

choke

bead

merely the choke

choke

by

simply well

referring

of

conditions grossly so
if

Unfortunately seldom prevail and misleading borehole of
in is

however
the deep

produces
stantial

in pressure invention
to

the

form

of

an

sub

weight

indicator

rise further teaches
series

often

very

well
to

es
cause
to

The
55 be

choke of In for choke

head rings

penally

the

crooked weight of of

or slanted the
drill that

adapted multiple

pass

through
is

may where

substantial be the by of

portion
frictional

the

string string

pulse

signal is

desired provision of an

this

regard choke
at

engagement borehole It is
driller

with such
tell

of

the

the rings

bead
selected

to

known
not even of the

under
able
let

move
60 the

through

the
rate

series

circumstances whether the the

the

may on
the

be

to

predetermined

to

result

unmistakable of pulses
at

in

on

the

form
the

predetermined intervals preferred practice of

what To
ha%e of permit the the

number

pre

weight

is

indeed

it

bottom meet
been
this situation in

on

determined In

invention
is

plurality in

various which

prior pair of

art

arrangements sections
joint

of

signaling

joints
iii

provided

the vary by

drill

devised
string

sdiacent

string

make on
the

possible under

for

the control

to

the

are

connected to
partially

telescoping contract extended
joint

to

as

weight
signal first

bit the

the

two

close lowers occurs weight to

sections are only the

When
weight of only of 70

two
drill

pulses

driller

stem to place then
drill at

until

telescoping on the

action bit

the

minimum
increased
string until

below

telescoping

and

weight
as

The

weight weight

may

on the bit and imposed be imposed on the
providing
that

desired for king

may
the

magnitude
drilling string

desired

by

continuing

lower
is

period

by

similar telescoping higher telescoping joint

action

signaled

selected

simply

weight

the

drill

PAS000I

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 6 of 13

8223383
further tion
is

feature concept

of the preferred of using to lower

practice

of the

inven

adjacent

telescoping

sections
is

of

the
to

drill

string
drill string

The
in

the

two
the

limit signals created
drill

bumper
the mandrel section dreL usual
drill

21 manner 22
24
is

connected
in

the

by
cally in

joint

stung

and may
be

the to as

shown
signal-generating part
is

manner on
the bit the
selected

to

maintain is
in

selected

magnitude
automatically

fixedly

connected regarded section of
at

weight to lower that

winch
bit

of

man
to

to
joint

signal indicatIng extended to the

signal-generating

24

connected

the

telescoping the brake
is

fully In
is

by means major
the of the shoulder

least

one

drill

subsequently second
signal

tightened the

response nearly

26

which

provides below upper

portion

of

weight

of

indicating control telescoping

drill

telescoping

bumper 22
is

sub an

The
of

automatic

responds
joint

to the of

the elects the Invention

action

The
outer

end

provided engages of the

circumferential inner
to limit

28 which 30

The
understood the

and from

advantages following

may be

erating sub of

the

detailed

description

downward
to the

extension

accompanying
drawings

In
illnstrative

drawings which

mandrel two
upper telescoping of

body 22

At
are

this

are

to

be

regarded

as

merely

15

tion

fully to

extended
slide

The
is

end
the

mandrel
sub

PlO
Illustrating

somewhat
first

schematic of

broken the invention of

view

scopically
limit

embodiment
created choke enlarged rings

which bead
20 yieldingly

not
abuts sub
sections

shown
At
are
this

at

body 21 to second which the upper end
shoulder
limit

upper of the the

the

two

signals

are

the passing

mandrel

an inner

32
the

through

two In

spaced an

bumper
weight

position

two

FIG FIG FIG

of

telescoping of

fully

contracted be

and on
the

whole
bit

retractable lb an

ring
enlarged sectional view yieldingly

the

drill

may
manner
is

25
tele

In provided

well with into

the

retractable choke

head
similar to invention

view of

HG
in the

termed

bumper wash
the

whIch
range of to provide the two

second are

scopes tension able

mandrel contraction the the

ex
tele

embodiment
produced

mandrel
of

FiG
the
limit

by
is

valve-controlled fragmentary

bypass sectional

means
view

fluid

between

showing
signal

scoping one 80 lion preferably
feet

sections

The

range

and
the for

contrac
is least

apparatus of the
is

shown
range of extension

produces

at

to

bumper

sub
at

and

eontraction

FIG
the second apparatus

fragmentary
signal at in

sectional other

view
is

showing
the

the

produced

The
tion section 35

structure

in

FIG
may

added

present

inven
bead

shown
is

comprises 24 38

the previously

mentioned
be

signal-generating or

PIG
illustrating

longitudinal another
signal in

sectional of of

view the
series state

to

PIG
which

embodiment
the ferns indicate telescoping

enlargement

mounted
an

on

downwardly
to the lower

extending

provides pressure

of

successive extension

40
wash and
the
tion

the pipe lower

being

connected apertured

end

of

the

pulses

to of

given

in the

34
choke

or spider

42

and
view

contraction
is

joint broken the
series

35
22 the

36
choke

respectively with the

Upper formed
lower with

FIG
of for travel

somewhat
in

diagrammatic for rate through

sectional

signal-generating or mandrel
section drill

24 move
head sub

sec
the

means
at

head
of signaling

38 moves

controlled

upper

or

bumper
in

body 21
with
is

choke
ing

rings
is

When
diagrammatic of telescoping the
the is

string

the
initially is

FIG
how
drill

bumper
into

broken
joints

sectional

view

show
in

sub

assembly the as

shown
indicated

lowered assembly the

series string

driller

may may

be

provided the

borehole tended shoulder

bumper
in

sub with

fully

ex

weight

FIG
the of the the

imposed on

in

closely controlled view the weight

FIG
for bit

manner
system

28
shoulder

mandrel 30
of

resting

on
sub
string

the

circum

diagrammatic controlling

ferential all

imposed
of

on

of

the

no
PlO

scoping
is

components At this
choke
drill

body to support helnw the head
38
is

time

choke

above

diagram

indicating

the

character

the

uppermost

50 another

ring

35

as indicated the
drill

pressure

pulse 10
is

When
hole end the

string

touches of the

bottom
string

of

bore
the and the

fragmentary sub

sectional

of

continues

signaling

prolonged 12

no no
the

bumper
11 pressure

signal-generating indicating the character of

section

24
to through

stationary to the

diagram
signal

bumper
choke section

sub head 24 choke of

38

body 21 downward The
ring choke

move

signal-generating through the

simplified

sectional pressure
signals

of

an stages of

head
restrict

38
the

passes

ment
in

for

indicating

by

successive

upper stream

35
fluid

to

downwardly
then as
falls

flowing

relative

movement

between

telescoping

parts

drilling

the consequence
fluid rises

that the thus to

drill

no HG
FIG
The

pressure 13
simplified

of the pulse

and wave

tie
the
at

sectional the

of

ating 60 an object top of

feeler

arrangement lower 14 end

indicate suspended similar view

from
the

pressure the well of the

which
pressure of

travels

wave
be

may
drill

detected
in

of

the top showing
feeler

well

by means
interior

pressure

gauge
string

munication partially

with

the

of to

As
the

the

retracted

and
15 plan of

two head
ring

telescoping 38 36

sections

continue passes

collapse the
rise

PIGS
ing

employed
signal general

approaches
to

and

through

second
in

13

and employs what
sub of assembly renewable

produce
that

second

pressure detected

or pulse the top

the

bumper

may be termed which may be of the
sphne type of of
drill

dnlling well

may

be

at

of

construction ufactured

bumper
invention string
is

sub

man
70

The
fact tbat

notes
drill string

first

signal

may
by
occurs choke with
drill

confirm

tbe

by

Baash-Rosi the

Division

has

Company
in

Manufacturing

bottomed registered
signal

simpiy

noting

In

embodiment
joint

the dicator head
driller

shown
provided

of

the the

weight second

telescoping signaling sub to the

in

When
passes
applies

as

in weight the choke
36

by bumper
nected

bumper
21 and

38

sub

assembly

which 22

through the brake lowering

the

includes

lower

nng
the

mandrel and

telescopically

con
two
75

associated of

drum and
then

to

terminate on the

body

the

the

body

mandrel

string

constituting

carries

drilling

operation

PAS000I8

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 7 of 13

8228183
Before the
carries

on

the

drilling

operation the

he
string

may

take

pressure choke snap

of the head to

restricted

stream

of

drilling

causes with

the

precaution
signal

backing indicates

up

accelerate

through of

choke

pressure

head
choke ring with
to

action consequent pressure to substantially create

spring
rise

moved
sure lag

upward
the
drilling

be

that

operation

is

started

signal in the to the top of

of the

steep

bumper
the any In the used

sub of event the

contracted

no
string

possibility

of
drill

pressure the yieding

pulse

imposing bit
until

on
is

the

moves
lower
it

upward
choke but the

from
retracts

drilling

operation the pressure of

continued

the

choke
enters the

sing

permitted

bumper
signal

under
10

fluid

pressure

ring

and

sub by through peats choke
It

up

as

indicated

by

generated head

prolongs
rise is

relative

upward
upper choke of

movement

38
re-

rise pressure terminated abroptly

the

accordingly

pressure spring

when

the

concealed to

the

35
the

The

driller string

able

to snap

the choke

head head
38a

its

normal

the

operation

position

head

38

passes

through appreciated that the

choke

36
of Is

If

in

may

be
signal

approaches in pressure
drilling fluid

yielding

choke of

ring the

upward from

movement
the stream both of

pressure

depends the

on

the

velocity head

of

by
causes

restriction

movement and also
completely the the choke

between

and
the choke head passes

downward and

retraction choke of yielding

on
through

whether

or not the

yielding the choke

choke ring past choke the head
result

the yielding range

and
the

ring
relatively

retraction
in-

head
rise

enters

20
steep
If rise

it

snaps

retracted snaps

choke upward
to
its

then
limit

pressure

somewhat
rise

gradual

whereas entrance

tracted

posi
of

abrupt pressure the choke head
is

created
in

rapid

As an
25

created steep sharp

signal pressure of
this

the

sustained

If

head
the choke

rmg moves
creates

the pressure rapidly

umniatalcable

pulse arrangement
is
is

end
sloped

An

important the

advantage choke

completely sharp of the pressure pressure

yielding

38a

below

the fixed

upper

puhe
pulse

of

yielding ring doubt
tion

choke
relative

the travel produces of
distinctive

shown
as
in

and
to

head
steep

in

either

isso or of

distinctive It

and
to be the various types

preclude

eventually

sharp of

pressure ssg

practices
signals

pulse 30 extent sharp

Thus
i.e
signals their

two
substantially
indicate

telescoped extended

sections to an

of and

may be
of
the

intermediate
distinctive

produced
relative

depending

on
between

the tha choke

extent

way
approach
limits

contracted of the
full limit

movement
le

bead

and

two

telescoped

ring

sections choke retractable SEe purpose

flO
is

opposite

contraction

and
driller

may
the

be

Made

full

extension lower the
at

Guided
an

the

two

yleldingly

For and 39
choke 43 of choke

this

can stop

intermittently appropriately
bit rate

or keep the

mounted

snap-type

rIng stop

37
ring 41
cylindrical

tinuoualy

coil

on upward
choke head In

lower and
is

snap-type protected the the

on
weight

the of

constant of

the

constant
string

weight that
is

urges the
skirt

portion joint of the

below

by on end

ring

FIG
of

telescoping structure in of the

lb 40 in

how
rod

may

be lb

The
tion

second

embodiment
is

the to the
the

the rod the

yielding

manner

flG
to

and

identical

40

is

reduced

form
choke head

structure

embodiment

as

indicated

by

use

curnferential is coil

shoulder

44

which
maintained

of corresponding

to indicate front

corresponding the
first

parts subsignal-

normally

by
head
coil

The
38a cut

second

embodiment
signal-generating section 52

spring
to

45
an
is

The

interior

of the for the space

stitution

50
substitution

for

away
coil

form
the

annular

space
this

spring

generating extension

24

and
pipe

tubular the choke

mounted
end end of the

between 48

upper

surface

compression the recess and nut

under

the

wash
sub

34
has

instead

head The
50 bypass

on

the rod

40
normally lower open bypass upper port sleeve against normally closed

on

the lower the

Preferably
stituting

structure

in

no
35

signaling port lower 54 bypass
is

modified ring 35a

by

subIa the

the yleldingly upper
fixed

mounted 38a With
ring 3Sa contraction

55
valve

for

by
lb the range of

port being normally held in abutment normally
coil

yieldingly
fixedly

mounted mounted
of the of

choke head choke

for the
yield-

shoulder

58 the as

suitable

spring sub assembly of the
fully drilling

When
is

bumper
in the upper

cx
fluid

ing than

retraction the the range

greater of choke the

shown
52

yielding
signals

3k
ing

bypassed

through
initially

port

54

When
in

tubular
initial

pressure

produced

extension traction

moves
telescoping

downward
sections as

the

con
closes

two
extension bypass

of valve

dnll string and

As
proaches on the

the the upstream upper

head
choke

SEa

moves
ring choke

downward
the
in

and

ap60

the the upper of
in

sleeve

pressure ring

port 54

as

shown
54 causes
fluid

FIG
corresponding which
rise rise

sides

the the

and
stream of the head

upper

bypass of
at

port the

created
fluid retract its
its

restricting

pressure

be

causes

both

the

head
continues of to

ring
retracts

to

readily

the top of

and
the ring

As
to 65
tract

the the

signaling

bumper
extension

sub

assembly continues

continues
to

to

con-

limit

retract

downward
pressure between sub

move
end

down62

limit

The on
the the
rate

resulting

signal

want
of sleeve tinn the

until

eventually

downwardly
encounters

extending the upper valve

depends

of

relative

movement bumper
drill
is

tubular valve
to

two
bly
it

telescoped

sections which

assemafter

and spring 56 drop

rate

string

is

the

60
opens the the
drilling

downward
bypass
fluid

in oppost of

bottom
the
rise

Usually
in

somewhat
even the

anomalous when
telescoped

port

55
be

to

cause

in relative sections

pressure
is

is

prolonged

pressure detected
It
is

movement
of the the

rapid sub carried

two
choke

may

at the top to be

of the well normally with
all

When
reaches

assembly

understood 55 the are bit closed
It

of the of the
fluid

3k
the in

ports 75

54

and
to

fixed

choke

ring

36

delivered

contemplated

bypass

PAS000I9

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 8 of 13

3223183
ports ping In
will

be

open

only of of the

to produce flowing second increment pressure
is drilling

When
fluid of of the the thereby

choke

head
pressure

enters of

the
drill fluid

ring stream of the the

68

the pressure the operation

by as
choke

in
is

stricting

stream
drill

the

dynamic
the

pressure

veution continued uncovering extension pressure ing
is

drilling until

the

of an normal upper

borehole

erated

stream the

against

upper to

end
pull the

terminated

bead
tubular

80

causes

choke

head

plunger

of

bypass

port

54

hy

the

dowoward
plunger valve
fine

in opposition

to the
in

spring

84

When
the to

the ball

52 which
fluid
result

signal

by

of the with
to restore

the dropping the drill port

18
fluid

is

forced

downward
closes the passage

ibm manner
the seat 94 to
its

in the flow

against piston with

con
pas

that pressure

the

upper the

bypass
driller

54

the

the

daslipot

covered lower

the

and

continues
is

sage the head

86

The
to

orifices

retards choke apart
us

to

the

until

pressure bypass to port dose
drilling

again

movement manner

of tha

plunger

78
spaces

dropped
driller

by
then port normal
until

opening backs

of

the

lower

55

The
lower

predetermined the

rate

which

up

the

drill

string

bypass

55
pressure the

restoring plateau
is

normal

pressure
is in-

predetermined of the passage 15 68 the by closely

two

signals

head apparatus
is

produced two choke
adjusted to

rings cause pulses

With
ensued

reestabbshed

and

70
of passage

pressure

again

dropped by
port

tubular

creation

two of the

unmistakable pressure

sharp 80

pressure

extension Ike
drill

52
string

uncovering
is

the

lowered

upper bypass an appropriate
invention generally

54

Then

head

the

two
sub-

increment

choke the signalling

68 and bumper
the

70
assembly the
is

continued

drilling einbodiment sub of 20 designated
in

When
sequently head
is

head
through

The shown
of

third

choke rings
signal

signaling in

bumper FIGS
to the

and
numerals

is

also

largely as indicaled by

68
use

and

70

struction

the

pulses
its

produce then the

to

upward two
the

the two

choke

somewhat
84
retracts

the

plunger

78
sub

to
as-

corresponding
third substitution

to indicate

corresponding the

parts 25

normal
continues passes
to to

The
in

sembly
eventnal.ly

extend
Through

upper the upper
signal

bumper choke

head

the

of

signs

erasing

section

upward
of the

yielding pulse that to
their

signal-generating

section generally of the
first

choke for the

nng

35n

produce

head assembly
choke

40 and
30

cates the
fully

approach

two

telescoping

sections

emhodimesit
section has of Ia an upper
yield-

extended advantage the character of of the arrangement are
is

The lady
scribed spaced bead retractable construction
fixed

The
is in

shown
produced

in

FiG
the
to

choke

SEa

previously
pair

de

signals that assembly

once extended

shown
choke

PIG

of

closely

signahng place both yielding heads

partially in

68 and
with rod pipe by

70
the thai
is

75

and

80

the the

range

between pair of

65 70
lower or spider

cooperating supported

rings suspended apertured
is fixedly

the Sb

35a
Irons
fitting

72

upper fixed

choke

ring

35a

and

rings 68

and

70
signals

end

of

the

wash

34 by
head level

an

ukable
sembly to
full

pressure

pulse

74

An

approach unmistakable signals

of pair

as
of of

mounted
level plunger

on the rod rod 72
78 carrying the lower

upper at an

choke
upper

extension

and

an

closely spaced

pressure to
full

pulses

approach kinds

casing lower choke casing

76

the

contraction

The
driller

two

SO by

extends

down
pur

stats

for for

two shows
to

limits the
in

unnustakable string

guid
of into

ward
poses 76

from

end

of

For

senling

ance

lowering

of the

suitable

0-ring

81 carried plunger long pressure

the cylmdrical

PIG
signaling the the
its

slidingly

embraces In exerts

78
coil

sub

As
casing upper end of

PIG
plunger retracted passage further the
is

maimer bow may be
it

series

spring

84

inside

drill

string

make
bit

possible

for the
at will

to

vary

the pull

on

piston the

on

weigbt ing
is

on

the
string

by

increments well

the

78

t0

from
lower
is

The
natal
to

drill

bit

normal
vided

upwardly dashpot the piston with

position

The
series

pro
of
orifices

86
with passage

mounted and the drill
sub

on

the

end

of

drill

collar

26
of

connected

the
is

end
modified the
drill

88 90
the In

is

passage

signaling

sub

100 shown
Immediately second

parallel

dashpot controlled upper

Plow
check seat

through

fluid

passage
ball

90

by
valve flow

coin
the the -hydraulic

bumper shown
naling

but

as sig

1cr

end
assembly to the 63 in

prising valve passage

92

and an

94

sub
is

collar

102

serving while

to prevent

downward

through

which bumper
sub

end winch
the

second signaling

signaling

upward
of the casing
is filled

sub

assembly

The
fluid is

bumper
the
collar

assembly

Ff0
to the

immediately 63
is third

above

such

as

suitable with port

The 95
in

plunger

78

tubular with the

signaling 105 ing

bumper
is

sub

assembly

provided of

communication
tubular plunger
suitable

connected

tenor
floating

the

casing 96 of the
in

76
floating

end bumper
three

of

third

signal of
in

106
construction but as
in

The
the having

sub 106
sub choke

embraced
piston In instrument

by

0-ring equalize the the

same

bumper

the

purpose of

the

being

to

FIG
stead of

rings

pressure
drilling sisal

casing to

76

wtth

two
the bore and
string

the

string

and
of sub

accommodate
instrument 63 upper 66 80 are

When
the
at its entire

shown
tension well

in

expansion the

and

FIG
touches the
total

lowered

contraction

well

before
is in

drill

When
fully

bottom
weight
bit

signaling

extended 75
is

bumper shown
the

assembly the

drill at

siring

FIG
choke

with

car

choke

ned
ered

the and

top then

of the

When
end of tbe
drill

bead
casing

spaced

above

76 above
string

upper choke

and

the

bottom

upper inches

string drill

is

low
string

head

substantially

the

two bottom
the ring Upper
35cr

When
the proaches
retracts

the
string

touches

positioned 70 rings 68 and the lowering choke bead the choke pressure continues

by
the

few

the weight sub

of

below
to ing
rest

signaling the bottom of

bumper
the

assembly and the

100

comes
signal

on

borehole
partislly

drill

continues upper

ap
ring sig to

the with

choke

and
of

bumper sub minor portion imposed on
at the

300
total drill ott

Thus
of the
drill is

weight the

consequent signaling

prolongation

the

with

nal

As
the
fixed

portion

carried

bumper
head 68

sub 80

assembly approaches

top of second signaling
it

contract pair
ol

choke

The
iS

choke

rings

70

bumper
the

sub weight of the second

not
drill

coilepse

carries

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 9 of 13

3223183 10
collar relatively as

well

as

the

weight of the

of

upper

of

the

two

the

lower

choke

ring

365

will

produce

prolonged

pres

parts

assembly 106
third

100
not

The
collapse 105 plus

signaling
it

sub signaling bumper sub assembly the weight of the signal second of the two

surerisa

ofthecharactershowninFlG
such sends pressure
rise

When
in
to

occurs

the

potentiometer signal voltage signal discrimi

does
drill

carries

corresponding

rising

collar

the

weight the weight of the the
first

the

signal sends responds

discriminator

and
to

the

ing
drill collar

assembly 102 the parts

63
weight

nator which

command
by
actuating the functions switch

power
of

transformer

132

134 manner on
well

The known one

upper

power
type

relatively

movable 100
upper

100
the sub

signaling

transformer of

sub

assembly the

which

successive circuit

actuations

al

When
the
first

end

drill

string

is

lowered
is

10

ternately

opens

and
the signal to relax the

Thus

com
the

signaling upper additional 63

assembly the
drill string

mand
is

signal

discriminator brake signal tightens

causes for

collapsed ered an sub

end
inches

low
bumper
weight 15

power
ing brake string the

transformer
drill string

few

second
to

signaling increase the

and
the

the

next

hoist drill

assembly

partially

collapses

to In

terminate
this

lowering the control

movement
system

of

outhednllbtt
upper of the

AtthistimeafloftheweightbelOwthe movable second two relatively parts of
sub assembly the the second
is

manner
keeps for

shown
sub

in

FBI
drill

automatically
partially bit

the

signaling

bumper

assembly the

signaling
all

bumper
weight parts of

the the

drill relatively

collapsed the weight
joint

constant portion

imposition of sub
drill

on

of

two

string

below

movable
sembly
is

signaling

bumper
to the point

as
20 of

the the

telescoping

in the 135 of

bumper
the

from
of the

top of the welL
drill string

shoulder
is

Further
partial

FIG
into duced

produced ring

collapse

third signaling

sub
to

assem assem
25

choke
the of the

by the and the tailing
reversal

pressure of entrance

assembly shown signal
the choke

in

head

shoulder of the

136

bly of

106
the

on
parts below

the

drill

include

subsequent choice

relative

pro move

third signaling

bumper
sub 102

ment
It

head
the

consequent ring automatic choIce system

withdrawal

bly
and

including

two
well
as

signaling

bumper
collars

assemblies

of the choke apparent that

100

as

the three

drill

25
In

in

the

illustrated

The

of the

embodiment
range of

of

the invention of in
positive

by

FIGS
rings

and 355
of

that

and two
of the

two

FIG
imposed
tion

in the

choke

and
the

365

constitute

cooperative
drill

on by

the

drill

second
of of The

means

two
the

sections

respectively
fluid full fluid

sting

of

amonnt

weight
distinguished assembly approach to

The

weights

im
to

30

to

vary
full

as the

two

sections thereby

approach to create
signals

posed sub
full single

signaling

bumper

both

contraction changes the of
in

and
the

extension to serve

assemblies contraction sharp

may
of

be the

pressure
dicative

two
of the

two two

limits

respectively

range

of

pressure

pulse

full

movement
of the in

sections invention to indicate
drill

of

the

intermediate pulses assembly sharp

produces approach to
full series

pair

The
an closely

principles arrangement parts of

may
are

he

incorporated to

pressure upper spaced

and 106

the

which

the

of

three

telescoping for

stung

collapsed
is identical

FIG
with spaced widely collapse the

pressure an of

pulses automatic control system connected

FIG
to the 110 are upper

shows end

lOt
transducer upper

pressure destgnated

which example shows series shown in FIG 141144 substituted for choke rings
structure spaced of the choke rings of

equally the range

two
of to

and

pressure
to

112
in

FIG
section

connected

the

end

of

drill

stung

108

signal-generating

24a

relative is

cor
into

pressure

communication
into

responding equal has of the diaphragm
drilling fluid is

pumped The which
is

the

drill

string 114

parts

bumper body not shown and the choke rings 141144

divided spaced
signals

are

ac
that

pressure exposed

transducer to the pressure

cordingly are created of

By

simply

counting

the

pressure

progressive signaling be of continually

extension

or progressive assembly of various

backed

by
to
slidahle the

coil

115

The
turn
is is

traction erator eo of

con op
stages

connected nected ed
to

which

to

arm 118
122

con mount

may

assembly
the invention
fluid is

on

pivot

The
and 124
this

operatively purpose
is is carries

connected

The many
for

principles other purposes

nay

be
is

to

potentiometer

where and For example 150
ocean being to

stream
to

or

movable 126
signal

coutact
resistor

which
that

adapted connected

to

traverse

signaling distance of

measure

potentiometer
tery to

across

bat
well
is

short
string

show from
screw-thread

The
the

brush

or

movable
or the pulse converts

contact 128

1.24

connected type 124 of voltage

tubing the upper

sensor

of

shown
tion

make
of ascertain

connec

known
ciprocated
fluid

art

When

movable
In

contact stream
into

re

end
is

near the ocean

by
the
siring

pressure

the

floor tubing the

The
approaches gradually touches with

to the

when
the
into

lowering to lower tubing

the at

potentiometer the 108
is

the

152 carefully can be
until

pulse

signal equipped with

128 bump
construction the

and

ac

The
er sub

tually

casing the casing of

rotated

threaded

engagement

shown
are upper upper choke choke
It is

in

except in

that both

two

choke

rings

The
vided for

lowest

section
series

of

tubing
rings

pro
154
rod spider head
feeler feeler

increased choke choke ring

dimension
be the

For example
extended 10 and the of the 65 lower lower

1mg
ring be
in

with

choke
slidingly

155

on
through

35b

in

FIG

156
158 as

The
serves

stop 13 tubing he in piece

engage thus

the

choke
the

FIG
that with the in head 38
at

shown
the 158

FIG
string

suspend
initially

apparent

the

in
70

when
spider

150
of

The
of the

termediate

FIG
into

may
end

inch

movement 355
in as
tier

of

the

head
pressure

the

upper

choke

ring

configuration

shown

FIG 15
feeler to keep rod the 156
feeler

signal

shown
being
as

The
spring ing
is

FIG
the

11

the head

rise is

in

pressure

long

wire casing

rod

from enter
rod

choke

within

choke of

ring

man-

the

The

relative

downward

movement

upper end spear 164

of

PASOO

021

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 10 of 13

8223183
11 When
with the water
is

12
is

the rod

150 156
as of

being
as

lowered

mounted
of the
fluid

for longitudinal flow of one position the
fluid

movement
to
rise

in

the direction pressure opposite to seek of

extended

shown

in

in response

in

the

13

continuously to serve

pumped
the through extent

downward

stream

retraction

in the biased

di
its

tubing quently choke choke
is

sialing one

medium
rod

Conse
causes of the the

rection retracted sure
is

member
stream but

being to

any
head rings

retraction

156
or the

in opposition

the said one

155

to

and

pass the

of

whereby
as
it

pres member
the other

which

feeler

nnrmally

retracted

approaches the

contracted pressure

may

be

ascertained that are created

counting in the stream of 10

member
it

and

thus

restricts

stream
the thereby

ing

signals

is

accelereted pressure
relatively rise

the of the

member
stream

water With
casing 152 the forked tubing lower with 150 with
feeler

consequent
to

the

cause
drill

sudden having

pressure
drill

end
the

of

the

156
and causes then the the sgnel 15

In

at

its

lower
fluid

end
there-

eventually continued lowering 155

contact of

152
string

and hole

forming
to

passage the to

fur

the

pumping
the

of

tubing
relatively

150

through

facilitate

drilling

of

bore by

choke warns
tiously signals

head

to

move
to

upward
first

through

the combination of sections of
joint

successive the operator that

rings

154
lower

pressure
string

pnir

the for

tubing

150

cau
screw about 20

telescoping

and

contraction to

from
the

and
can

by
of the

counting
just

the

pressure the
is

whereoy
apply the be
full

pair

may
through given

be

operator the with

ascertain

when
string

string

on
to

the
hnitt

or the

thread to ing

165 on

end
the

tubing

may
joint

range

make 152
After

contact

screw

thread

the

cas an
25

applied

weight

to

the

weight

below
through
in

telescoping the
fluid

while

drilling restriction

proceeds

range
passage in

the
fishing

tubing tool the

string

150

is

joined

to

the the the 160

casing

annular

member
the said

152
string

may
spear

he

lowered

through

one
choke
tions

of the

two

telescoping earned into other the two

to

engage
to

164
the

for withdrawing wire choke with fork

member move
to

sec re sec

rod contract spider drop

the

surface through he

readily

restriction

member two
to produce

to pass 158

rings the

154

The
or

sponse

relative

movement
stream of

between
fluid

may

withdrawn
well

feeler

may

tions

to choke
signal

the

into the

pressure
detail

My
bndirnents
substitutions

of various

em
my
disclosure claims

said

being through

stream mounted
range

with
relative to

to

of

the

invention other

will

suggest

move
section yielding of

the

and

departures of appended

00 which means
fluid

it

is

mounted
force counter to the the direction pressure
at

within

the

and

scope

exerting

claim
In and forminng to the passage to for the
drilling drill bit at

fluid

and
stream position being the

normally to hold

overcoming
the

lower of of thud borehole

of retracted said force sure of

member

through

facilitate

insucient
stream choke

to

overcome by

rise

pres
of the

the combination pair of

of
of joint the for
string

fluid

caused

restriction

sections

interconnected

by
40

stream the of

by

the

member
approach to close proxiniity of to the the

telescoping

end

contraction to

restriction

member member
acceleration

whereby
ply substantially the
hit

of sections
all

may
weight

be of the
drill

ap

the

re con

of

the

string

striction

member
into the
rise

causes
restriction

on
to
drill

or the

be applied

extended to telescoping the

given weight while

range of the 45
said

member
sequent

limit
string

fluid set

below
through at the one

the

joint

drill-

combination range
restriction

as

forth

pressure in
axial

in

which of

lag proceeds ring

the

means

point

range on
of ring

exceeds

the the

dimension

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two

sections

the

member
through

whereby
of

choke

restricting

passage

locally

and
sections in to

accelerated pass to the 50 consequent poIse

is member member with

body
relative

carried

by

other the between of

two means two
the
fluid

relatively

high

ampli
said

completely

response

tude pressure

the as
is

fluid

stream
claim axiat dimension
is

movement
the pulse stream

sections

thereby
to

combiuation longitudinal
restriction

set

forth the the

to choke duce

temporarily
said ring

of pressure located of said

in the

pro means coop
55

range

than

of accel with

member
into not creation in through of stream

choke

and body
erate In as
drill

being

on

the

two
is

sections

to

erated

the sudden
to reintively

member
rise

on

end
string

range
drill

approached
at its

consequent pressure level in

having for
facilitate

lower
fluid

high

and
through
the

passage to the
bit

the

pumping
drilling

of of

to

the

borehole

string

having for
facilitate

drill

bit

at

its

lower
fluid

end

combination pair of

of
of
joInt

and
the for of
string

passage
to

the

pumping
drilling

of of

interconnected

by

00

through

the

bit

to

the

borehole

telescoping

extension

and
be
to

the combination pair of

of
drill joint string

whereby
apply or the ing the

the

pair

sections of the

may
drill

weight extended weight
to

string

on

the to

bit

telescoping

for extension

and on

contraction to
bit

by where
apply he

may
joint

he

through the weight

given

range

limit

by
05
full

the pair weight

of of

sections

may

be

collapsed the to

applied

string

or the
joint

extended
drilling restriction

proceeds in
fluid

range
weight passage
in drilling

through
to

given

range

limit

an

annular one choke
tiosis

member

the

below
through

the telescoping the

while

of the

two

telescoping carried into by

sections the
restriction

proceeds

range
in

member
to

an
of the

annular one choke
tions

member two
telescoping

the

two sac
in

fluid

passage

in

move
to

of

said

member

re sec

sections other the two in two

member
to
to

sponse tions to

relative the

movement
stresm
fluid

by
into said

sec re sec

between the
to

two
produce

move
relative

choke

member
between
fluid

of

spouse

movement
stream of

the
to

pressure
at least

signal in One of

stream members
being

tons movably
pressure

choke
signal

the
in

two

produce

stream

PASO

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 11 of 13

3223188
13
said
to restriction

14
mounted
range with
relative

member

being

freedom
to the

lapsed
bit

to

apply be

the

full

the through

string range
to

on

the

move

through

longitudinal
it

or

section

on

which

is

nionnted
force counter to the pressure
at

applied while
drilling

to

the

weight through

gwen below the
the apart

limit

telescoping

joint

yielding of of

means

exerting

range on
to

and
fluid

pair

of

first

means

spaced

of the

two two two
ends

stream

to

bold

the

member

sections of the

at positions

corresponding

retracted said pressure stream
insufficient being of the stream

to caused

overcome by
restriction

rise

in

the the 10

second
tions

range and means carried
cooperate pressure with

the said in the

the

sec
to

of
restriction

two

spaced stream

means
as the

whereby
to close

relative

approach to

of the

the

create ends of

signals

two

member
causes In and through the
to

proximity of the

member

the drill

range string passage

approached
having for the to dull
bit

acceleration
drill

restriction drill bit at its

10
lower
fluid

at of

its

lower stream

stung passage

having for the

and

forming

pumping
the

fluid

pumping
drilling

therethrough 15

to the

bit

facilitate

drilling

bore by

the

bit

to

facilitate

of

hole
pair

combination the
joint

combination pair of of
joint string

interconnected extension and be

interconnected

by
to

telescopmg

for

contraction to

telescoping

for

and may
given he

contraction

whereby
ply 20

the
full

of sections

may
given

ap
or

whereby
ply be

the

pair of

collapsed

ap ap

on
through to
drilling first

the to
limit

thefollweightofthedrillstringonthebttornay
extended weight while through
to

may
joint

be

extended

range the

range

to

limit

applied while

the

weight

below
through

plied
joint

the proceeds through the

the the
fluid

telescoping

range on two
of the

range
passage
in

plurality of

means
the

spaced

apart

an

annular one choke
tions

member two
telescoping carried into

two

sections

of the

sections of the

second

means
wtili

other

of

the
first

sections to

to

member
to

by betwen
to

two sec
in

cooperate pressure
close

said plurality of

means

move
relative

said

member two

re

signals to cooperate in of

of

first

means

being
signal

sponse
to

movement
of
fluid

sections pressure 30

together

producing

choke
in

the

stream
fluid

produce

characterized rises said second

pressure

signal said

stream mounted
longitudinal
it is

choke

member

with

freedom
to

to the

means

being

mounted

with exceeding the plurality

to the of

move
section yetding of of

through on which

range

relative

move
overall

through longitudinal dimension

range of

mounted
force counter the direction

means
flow
fluid

exerting

first

means
means
flow stream
limit

fluid

normally stream hold

overcoming the pressure the choke member at overcome by
in relative

yielding of of

exerting

force

counter overcoming

to the

direction pressure

fluid

retracted said force of

position being toe by
fluid

the

hold

second

means

at

re

to stream

rise

in of with of The

tracted said sure

sure

restriction

being caused

insufficient

to

overcome

rise

stream
restriction

the choke

member
close

cooperation approach to the choke consequent

by

stream

pres where
close to the in

member
to acceleration

by
the
plurality

choke

member member causes
into
rise said in restriction

restriction

the second approach means means causes acceleration past the

of with

member
steep

second

means
of the

means means
with consequent pressure rises 10

op

member
pressure being

position to spacing

the yielding

close

the

fluid

restriction

member
through which

mounted
range

with
relative

freedom
to tbe

11
cludes the second

combination

as

set

forth

in

which
of
rises

to

move

longitudinal
it

means

to

retard

the to space apart

movement
the pressure

section yieding
fluid

on

is

mounted
counter the direction pressure of 50 of
at

means

thereby

means

exerting

force

in

manner

and
fluid

overcoming
to hold the
restriction

12
cludes

as

set

forth

in claim

in

the

stream

member
rise

means
of the second In
drill

to retard the

move
bit

retracted said pressure stream

position
insufficient to

ment overcome by
to restriction

means
having
drill

in the of the

13
and
the through

at

its

lower
fluid

end

of whereby to

stream

caused approach

forming to the

passage to

for
facilitate

pumping
the
drilling

of

there

of the

the choke

restriction

borehole

member
causes

close

proximity of
rise

member
with

of
plurality

acceleration steep

the
in

restriction fluid

member
pressnre in

pairs

of of

of

the

drill

string

in

consequent

the

which which
the nected tension tracted pair and

two by
of

sections

combination longitudinal exceeds the with range of

as

act

forth

in claim

joints

pair for contraction the with
string

intercon and be

restriction

member
of

longitudinal choke approach other

range

substantially choke membar

whereby
beginning the continuing to
drill

may

acon

lowermost

whereby
restriction

member
of the causes ranges

downstream two members
of
restriction

from
to close

by
then of

member
each

lower

the

drill

string

the

proximity along ber
their

advance with to the

members

weight of

determined pairs of sections the the

by
respective
fluid

mem
of

contracted cooperative of of extension

passing

the
rise in

member
the of having for
bit

shorten caused

the

duration

two
ly

means on
to vary approach to as

two
flow

sections of
full

the pressure
tive restriction

stream

by
lower
fluid

coopera end
sod 70

pair

the

as

the

effect string

two members
drill bit at its

pair
full

both create
signals

contraction changes

and
in

In forming therethrough

pressure
indicative

passage
to

pumping
to the pair of
joint

the stream
limits

to serve respectively

two
the

two
of

the

of of
the

bore
drill

range

of

movement
to the

hole
string

the

combination

of
the

pair

means

interconnected contraction

responsive of the

to

one

of
string

said to

two

signals

initiate

telescoping pair of

for extension

and

whereby

lowering sections

drill

sections

may

pair

of

be

cot

and

PAS00023

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 12 of 13

3223188 15
means
cease pair responsive the
to

16
two
to as the signals cause
is

to

the of

other

to

signal for pairs

each

pair

of

sections

to

identify

the

individual

lowering

said pro-

extend deepened
string

borehole operation

13
ing of

in
fluid

drill

passage

for the combination

pump
of

gressively

the

drilling

through of the

strmg
drill

the

hy
pair

drill

may
to

he

to cause

selected responsive pair telescoping through

interconnected extension
relative

sections

collapse
effective

two
to keep the

joint range

for of

and

retraction

means
Weight

may
Ofl drill

then thereby

movement
of

contracted

to

maintain

corresponding spaced apart

means
of

on

one of

two
sections said
in

sections

the

drill

longitudinally

14
and through

In forming to

string

having for
facilitate

bit

at

its

end

10

with

plurality second to

subdivisions carried the the

range
of

passage the to

and
drilling

means
traverse of

other

two
in

plurality

means and
for to

the combination pair of

of
the
joint drill

said interconnected

range

relative

movement
first

cooperate

sections

by
15 to apbit

with to create

plurality corresponding

means

choking

telescoping

for

and

contraction

pressure the

signals stages

whereby
ply the

the

pair

of sections of the

may
given

be

collapsed

stream

indicative

of

relative

weight extended weight to

string

on
the

the

or

movement

between

the

two
the

sections
drill at its

may be
applied
joint

range

limit the telescoping

19
and
20 through the to

drill

lower there-

the

weight

below
though

passage the to

for
facilitate

pumping
the
drilling

of

fluid

while

drilling

proceeds

means
tiona

including operative the wall

valve to

means
section of the section

of portion to produce
in

range the two
of

borehole

sec.-

combination
series

bypass

of with

pairs the

of

drill

string

sections pair

the

through lowering

the pressure

passage operate said of

by and
the

sections

of whereby
the to

interconnected
drill string drill

by

telescoping
in

means tWo

carried
in

by
to

bottomed
traction

the be the

borehole
lowered string

tipper end

of the

means

response

the

relative

movement

may

cause

longitudinal of the

conpairs

sections
drill string

15
and
the

In fornilng
to

having for

drill

at

its

end increase borehole 30 in the

sequence

with

progressive

passage
bit

of the of

throngli

the

to

facilitate

two

cooperative

means
sections

imposed on the drill the two sections of
responsive
initiation to

the of

combination pair of
sections

of
of
joint

erniost pair the
drill string

collapse

interconnected

by
to

lowermost

pair of

to

signal
drill

longitudinal

telescoping

extension

and
be

contraction apor

string the

whereby
ply the be

the
full

may
weight of through to the proceeds though given

and two
the
full

cooperative pair pair of

means
of the

two

sections

of

the of
to

string

on
the

the
to

may
joint

uppermost
uppermost

extended weight

range

limit the

to responsive sections to signal
drill

collapse

applied

telescoping

contraction

string passage confining

while

drilling

the

range
respectively the of 40

20
stream two
the

structure forming combination of

two
of

cooperative means the pair to vary approach to create
signals

on
the

the

two

sections as

of
structure
relative

flow

sections

telescoped to each one other of the

for

sections thereby serve as

full

and
changes of

full

extension
fluid limits

longitudinal
restriction in

movement
the passage

pressure

in

to
re-

carried

two

two
of

two

sections choke

spectivey

range
to one of
string

means

by
the

the

other

normally the

responsive of

said to

two
contract

to the

initiate

43

spaced

restriction

pas

lowering sections

drill

pair

of

and
to the of other the of said
string

sage means means
to the

to sense responsive

condition
to

means
cease pair ened

responsive the to

two
to

signals

to said

said

sensing the

lowering as

drill

cause

tudinal canse

movement
relative

extend the

the borehole operation

progressively

deep-

between movement
towsrds
in

means two
the

to

cause

longi thereby

of

restriction

and

by

16
and
through the

choke

head

to the stream

create

In

drill

string

having for the
facilitate

drill

at

its

lower

end

passage to to

of the of

there-

signaling pressure the stream restricting
local

by

progresiively the

with

progressive

increase

velocity to

stream
accelerate
relative

combination plurality of

of
pairs of of pair
joints string

and
in intercom

means tween the
to

movement
in the increase

be-

choke
in

head
velocity

and

the

restriction

which
nected tension traeted pair then

the

two
telescoping for the

the

rise

thereby

to

rate

contraction
pairs

and
he

cxcon-

of

of

pair

whereby
drill

may
the

21
and

pressure In drill

rise
string

having for the to

bit

at

its

end stream of bore-

successively bottoming
to

with the
siring drill in

lowermost

by
the

forming

passage to the

pumping
the

of

the

borehole the

and

therethrough

facilitate

continuing
bit

lower

string

on means

weight of

being

determined

by
of

the

number

con
63

hole
pair of sections of
string

tracted

pairs of sections vary
in

and
in

interconnected and he
string

by

the

telescoping

extension pair sections of the

pressure

the

string

response

contraction of the
said

of each
string

of the pairs
to

whereby
apply or the 70 the be
full

may
dnll given

collapsed

to

to the contracana

to the top of the

indicate

weight

on

the to
limit

pairs

means
the
fluid

compnsing
of
in

may

through to the weight

cooperating parts of each pair of sections
string

two
exposed the

sections
to

respectively the in

the through choke

telescop

jomt
first

while comprising sections comprising on

proceetls at
least

the

range on
one

to
to

variably longitudinal

stream of

of

fluid

e-

means
the

one

sponse
relative

movement
forth pressure

two
16 75
different

of

two

to each as the
set

second claim
ly

means and

different

number
of the spaced

close sections longi

17 the

combination

spaced

choke

said one being

two

means

to

vary

said

means

apart

PAS00024

Case 1:03-cv-02579-RPM

Document 143

Filed 01/11/2007

Page 13 of 13

3223183 17
tudinally ing to choke to the
fluid

18
at

of said

one

section the the

positions

correspond two
sections
rises

the

two

ends

range
other create

and
of the

body
the

carried

2539758 2624549 2633098

1/1951

Silverman Wallace

et

at

17548 11670
175321
3CR

3/1953

Ellis

nngs
indicate

to

pressure
limits limits

stream

two two
the

of of

range

2724574 2776817
2857138 2892436 2901221
-2937007
10

11/1955 1/1956 10/1958 6/1959 5/1960

Ledgerwood Gregory clii
et

and

to distinguish between References Cited

range

at

Frnmtner

Hay
Whittle

17527 11670

UMTED
1766326 1891062 1891329
6/ 1930 12/1932 12/ 1932

STATES

PATENfl
et

___
et
..

175321

\088532 CHA1LES

____
Primary Examiner

175320

Sager

Compte

17538

OCONNELL

PAS00025