1
James K Cunningham: Thrust bearing for use in downhole drilling systems. John D Gassett, Frank J Catalano, Scott R Zingerman, January 2, 1996: US05480233 (183 worldwide citation)

A thrust bearing for use in downhole drilling systems employing fluid motors having a stator retaining ring and a rotor retaining ring. These rings have a plurality of bearing inserts. The bearing insert surfaces of the rotor contact the bearing surfaces of the stator. The studs which make up the be ...


2
Pierre A Beynet: Drilling fluid bypass for marine riser. Standard Oil Company, John D Gassett, September 29, 1981: US04291772 (169 worldwide citation)

Method and apparatus are described to reduce the tension required on a riser pipe used in offshore drilling between a floating vessel and a subsea wellhead. Heavy drilling fluid is circulated down a drill pipe and up the annulus between the drill pipe and the borehole wall to a point just above a su ...


3
Marvin Gearhart, David W King, Rudolph R Mendoza, Serge A Scherbatskoy, James D Young: Downhole signaling system. Gearhart Owen, John D Gassett, Paul F Hawley, June 22, 1976: US03964556 (118 worldwide citation)

This describes a method for improved data signaling equipment for use with well-drilling tools for rapidly sending measurements made down the hole in the wellbore to the surface without the need of an electric cable. A special well tool is connected into a drill string having a drill bit coupled the ...


4
Marion David Genna: Heat-sensitive subsurface safety valve. Standard Oil Company, John D Gassett, Pawl F Hawley, April 20, 1976: US03951338 (50 worldwide citation)

This is a subsurface safety valve for insertion in a tubing string centered in a well drilled in the earth normally for the production of oil or gas. Under normal flow conditions, a spring holds a flapper valve in an open position out of the flow path of the fluid. An increase in the temperature of ...


5
James A Britch, John R Smith: Flapper-type subsurface safety valve. Standard Oil Company, John D Gassett, Arthur McIlroy, May 25, 1976: US03958633 (47 worldwide citation)

This is a subsurface safety valve for insertion in a tubing string in a well drilled in the earth, normally for the production of oil and gas. This valve is lowered and retrieved by wireline and is seated in a special side-pocket mandrel which is a part of the tubing string. One suitable valve is a ...


6
Hubart B Zaremba: Split-ring riser latch. Standard Oil Company, John D Gassett, February 6, 1979: US04138148 (42 worldwide citation)

A latching and unlatching system for connecting a riser pipe to the casing in a subsea well. A split-circumferential ring fits into mating grooves in the male end of the casing and the female end of the riser. A releasing tool runs on a drill pipe suspended within the riser pipe and has a number of ...


7
Alfred E Jageler, Robert A Broding, Lauren G Kilmer: Apparatus and method for drilling into the sidewall of a drill hole. Standard Oil Company, John D Gassett, October 19, 1982: US04354558 (36 worldwide citation)

A method of core cutting and apparatus operable on a seven conductor wireline logging cable for drilling a hole in the sidewall of a drill hole which comprises an elongted housing with a hydraulically operated backup shoe mounted within the housing for wedging the housing at a selected location in t ...


8
Adel A Sheshtawy: Apparatus for use in lowering casing strings. Standard Oil Company, John D Gassett, June 16, 1981: US04273372 (34 worldwide citation)

An apparatus for use in lowering casing strings or other parts from a floating unit to a subsea well which includes an expansion-type casing running tool employing extendible latches that have left-handed threads cut on their exterior for engagement with similar threads on the inside of the casing w ...


9
Johnce E Hall: Flexible workover riser system. Standard Oil Company, John D Gassett, August 4, 1981: US04281716 (33 worldwide citation)

This describes a method of performing operations in a well selected from a group or cluster of subsea wells which are produced through a production riser means to production facilities on a floating platform. There is provided a flexible workover riser on the platform which extends through a passage ...


10
Pierre A Beynet, Johnce E Hall: Carousel for vertically moored platform. Standard Oil Company, John D Gassett, April 24, 1984: US04444275 (27 worldwide citation)

This invention involves a modification of the prior art subsea drilling system in which a carousel is positioned on a central post surrounded by a coaxial circular array of well slots and is adapted to be rotated by drill pipe through conventional means, from the floating platform. The carousel util ...