1
Nigel Dennis Griffin, Peter Raymond Hughes: High volume density polycrystalline diamond with working surfaces depleted of catalyzing material. Camco International, Jeffery E Daly, April 8, 2003: US06544308 (231 worldwide citation)

Disclosed is a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The PCD element has a body with a plurality of bonded ...


2
Nigel Dennis Griffin, Peter Raymond Hughes: High volume density polycrystalline diamond with working surfaces depleted of catalyzing material. Camco International, Jeffery E Daly, May 13, 2003: US06562462 (185 worldwide citation)

Disclosed is a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The PCD element has a body with a plurality of bonded ...


3
John D Barr, Mark W Burrell, Robert A Russell, Richard Thorp, David Boast, John Clegg: Modulated bias units for steerable rotary drilling systems. Camco International, September 10, 1996: US05553678 (178 worldwide citation)

A modulated bias unit is provided for controlling the direction of drilling of a rotary drill bit when drilling boreholes in subsurface formations. The unit comprises a plurality of hydraulic actuators spaced apart around the periphery of the unit and having movable thrust members hydraulically disp ...


4
Nigel Dennis Griffin, Peter Raymond Hughes: Polycrystalline diamond partially depleted of catalyzing material. Camco International, Jeffery E Daly, July 15, 2003: US06592985 (178 worldwide citation)

The present invention provides a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, hig ...


5
Mark S Reddick: In-situ polymerization method and apparatus to seal a junction between a lateral and a main wellbore. Camco International, Tobor Goldstein & Healey L, January 18, 2000: US06015012 (133 worldwide citation)

An improved method and apparatus for sealing a junction between a central and lateral wellbore is provided. In a broad aspect, the method of the present invention includes installing a polymerizable sealing sleeve within a first casing in a central wellbore at a junction between the first casing and ...


6
John D Barr, John M Clegg, William C Motion: Steerable rotary drilling systems. Camco International, Brigitte Jeffery, July 18, 2000: US06089332 (119 worldwide citation)

A steerable rotary drilling system has a bottom hole assembly which includes, in addition to the drill bit, a modulated bias unit and a control unit, the bias unit comprising a number of hydraulic actuators around the periphery of the unit, each having a movable thrust member which is hydraulically ...


7
Brian K Moore, Ronald E Pringle: Spoolable coiled tubing completion system. Camco International, Fulbright & Jaworski, May 2, 1995: US05411085 (116 worldwide citation)

A coiled tubing completion system is provided with a plurality of completion apparatus, all of which is designed flush with the diameter of the coiled tubing outside diameter for avoiding upsets and are flexible, spoolable on a coiled tubing reel and having through bores large enough to pass wirelin ...


8
Winfield M Sides III, Tracey Tollefsbol: Internal coiled tubing connector. Camco International, June 11, 1996: US05524937 (114 worldwide citation)

An internal coiled tubing connector for connecting a first length of coiled tubing to a second length of coiled tubing includes a cylindrical body having a longitudinal bore therethrough and adapted to be inserted into the first length and the second length of coiled tubing; a by-pass passageway ext ...


9
Douglas Caraway, John Hayward, Malcolm R Taylor, Tom Scott Roberts, Steven Taylor, Graham R Watson: Rotary drill bits. Camco International, Fletcher Yoder & Van Someren, November 30, 1999: US05992547 (108 worldwide citation)

A rotary drill bit for use in drilling holes in subsurface formations comprises a bit body having a leading face and a gauge region, a number of blades formed on the leading face of the bit and extending outwardly away from the axis of the bit so as to define between the blades a number of fluid cha ...


10
Eric F Drake, Harold A Sreshta, Nigel Dennis Griffin: Methods of treating preform elements. Camco International, Jeffery E Daly, February 11, 2003: US06517902 (105 worldwide citation)

A method of thermally treating a preform element, of the kind having a facing table of polycrystalline diamond bonded to a substrate of cemented tungsten carbide, comprises the steps of: (a) heating the element to a soaking temperature of 550-625° C., and preferably about 600° C., (b) maintaining th ...



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