ADJUSTABLE WHIPSTOCK Russian patent published in 1998 - IPC

Abstract RU 2109908 C1

FIELD: bore-hole drilling machinery and equipment. SUBSTANCE: this relates to drilling horizontal and inclined bore-holes and it particularly refers to adjustable whipstocks with varying angle. Whipstock has hydraulic cylinder with piston-rod, and body of deviating unit. Hydraulic cylinder is provided with throttle valve, slots for guide members of piston-rod. Made in its outer side are milled slots intended for turning of body of deviating unit. Positioned inside deviating unit are disk and detent with pins stationary secured on them. Disk and detent are engaged with milled slots in hydraulic cylinder. Also provided is ratchet wheel engaged with pawl which is mounted on disk. In addition, body is provided with slots in which teeth of detent are seated. Sliding friction bearing is installed between hydraulic cylinder and body of deviating unit. EFFECT: higher efficiency. 4 dwg

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RU 2 109 908 C1

Authors

Basarygin Ju.M.

Budnikov V.F.

Geras'Kin V.G.

Majchub Ju.G.

Strel'Tsov V.M.

Sugak V.M.

Dates

1998-04-27—Published

1996-07-16—Filed