Free Motion to Strike - District Court of Colorado - Colorado

Case 1:03-cv-02579-RPM

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Varco v. Pason Brett Responsive and Supplemental Expert Report The purpose of this Report: is to respond.to, opinions expressed in the,report ,. the of Gregg E:Perkin, submitted by the Plaintiff, Varco L.P., and toifurther express $he . supplemental opinions of J. Ford Brett in this matter. Since the date of my lastz' . Supplemental Report, I have reviewed and am relying upon the additional documents: and materials listed on Exhibit A:, attached, This Report is organized by the specific at issue in the case and setsf~rth..eom~ent+if-.a~y ~ ~ ~ a . i i m - . e o n 3 ~ ~ u c t i O n .... ~ infringement and obviousness, respectively.
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Claim I

Elements
A,'
B.
C.

An automatic drilling system for automatically regulating the release of a drill string of a drilling rig during the drilling of a bore-hole, comprising: a drilling fluid pressure sensor;
.

a drilling fluid pressure regulator coupled to said drilling fluid pressure sensor, said drilling fluid pressure regulator measuring changes in drilling fluid priessure,and outputting a signal representing those changes; a relay coupled to said drilling fluid pressure regulator; said relay responsive to the output signal of said drilling fluid pressure regulator to supply a drill string control signal at the output thereof; and a drill string controller coupled to said relay wherein a decrease in drilling fluid pressure results in said relay supplying a drill string control signal that operates said drill string controller to effect an increase in the rate of release of said drill string and an increase in drilling fluid pressure results in said relay supplying a drill string control.signal that operates said drill string controller to effect a decreasa.in the rate of release of said drill string.

D.

E.

Method of Construction_ Although we reach different conclusions, I do not disagree with the method of claim construction set forth in paragraphs 17- 19 of Mr. Perkin's report.2 From my reading, it does not appear that Mr. Perkin's renders any specific opinions based upon the doctrine of equivalents, which I understand can be used to broaden the interpretationof claim language to encompass devices, apparatus or methods that perform a substantially similar function to the claimed system or method, but rely upon after-developed technologies that the inventor may not have anticipated (for example,
1

For reference purposes, I have identified the elements by capital letters. 1 will use that method as the basis for all of the opinions that follow.

8273.0203 i1.339698 vl

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