1
John E Tschirky: Drilling and casing landing apparatus and method. Smith International, Bernard Kriegel, Philip Subkow, Newton H Lee Jr, January 9, 1979: US04133396 (69 worldwide citation)

Casing is run into a well bore hole on a running pipe string. Fluid motor and drill apparatus is supported in the casing, with the drill extending below the lower end of the casing to drill the bore hole in advance of the casing. For subsea drilling operations, the casing is suspended from a riser h ...


2
John E Tschirky, Gary Monroe Crase: Radial bearings. Smith International, Subkow and Kriegel, June 14, 1977: US04029368 (53 worldwide citation)

This invention relates to hard metal radial bearings particularly suitable in connection with thrust bearings which are lubricated by erosive fluids passing through the radial bearings as are employed in down-hole drilling motors.


3
John E Tschirky, Gary M Crase: Circulation sub for in-hole hydraulic motors. Smith International, Philip Subkow, Bernard Kriegel, November 2, 1976: US03989114 (29 worldwide citation)

This invention relates to circulation subs used in connection with hydraulic in-hole motors with means for selectively interrupting circulation through the circulation sub.


4
John E Tschirky: Progressive cavity transducer. Smith International, Subkow and Kriegel, December 28, 1976: US03999901 (26 worldwide citation)

This invention relates to progressing cavity fluid motors with multiple stator elements connected in series to provide a fluid passageway from the input of the initial stator of the series to the output of the terminal stator of the series; the rotor elements in each stator are connected together fo ...


5
John E Tschirky, Bela A Geczy: Sealed bearing means for in hole motors. Smith International, Philip Subkow, Bernard Kriegel, May 11, 1982: US04329127 (21 worldwide citation)

An in hole fluid motor for driving a drill bit utilizing the circulation of drilling fluid to drive the motor, having a sealed bearing assembly. The bearing assembly has a hollow, rotary drive shaft disposed within a tubular relatively stationary housing with radial bearings and thrust bearings disp ...


6

7
John E Tschirky: Wafer elements for progressing cavity stators. Smith International, Subkow and Kriegel, August 17, 1976: US03975121 (19 worldwide citation)

A progressive cavity motor with a bifoil stator assembled in a straight-sided wafer array and methods of formation of said stators.


8
Gary M Crase, John E Tschirky: In-hole motor drill with locking bit clutch. Smith International, Philip Subkow, June 7, 1983: US04386666 (18 worldwide citation)

An in-hole motor drill assembly has the rotor of the motor which may be connected to the drill bit through a shaft connected to the rotor, and a housing which may be connected to the running string, and a normally disengaged clutch between said housing and said shaft. Means are provided for engaging ...


9
John E Tschirky: Segmented stator for progressive cavity transducer. Smith International Corporation, Philip Subkow, September 28, 1976: US03982858 (18 worldwide citation)

This invention relates to progressing cavity fluid motors with multiple segmented stator elements connected in series to provide a fluid passageway from the input of the initial stator of the series to the output of the terminal stator of the series; the rotor elements in each stator are connected t ...


10
John E Tschirky, Gary Monroe Crase: Floating flow restrictors for fluid motors. Smith International, Philip Subkow, February 3, 1976: US03936247 (17 worldwide citation)

This invention relates to flow restrictors in fluid motors where the operating fluid also passes through the bearings of the motor.