CONTROLLABLE WHIPSTOCK

FIELD: well drilling equipment, particularly whipstocks with changeable angles used in horizontal and inclined well drilling. ^ SUBSTANCE: controllable whipstock comprises hydraulic cylinder with throttle and piston-shaft assembly provided with guiding extensions, deflectable unit with grooves to re...

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Bibliographische Detailangaben
Hauptverfasser:	DMITRIEV IGOR' ANATOL'EVICH, STREL'TSOV VIKTOR MIKHAJLOVICH, GERAS'KIN VADIM GEORGIEVICH, SNEGIREV SERGEJ NIKOLAEVICH, BAKANOV JURIJ IVANOVICH, SHOSTAK ANDREJ VALER'EVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	FIELD: well drilling equipment, particularly whipstocks with changeable angles used in horizontal and inclined well drilling. ^ SUBSTANCE: controllable whipstock comprises hydraulic cylinder with throttle and piston-shaft assembly provided with guiding extensions, deflectable unit with grooves to receive guiding extensions of piston-shaft assembly, return springs and bearing. Hydraulic cylinder additionally has upper and lower immovable fixing bushes with cams uniformly distributed over diameter and shifted one towards another in radial direction. Hydraulic cylinder comprises spring-loaded movable fixing bush provided with two rows of cams uniformly distributed over diameter thereof. Lower immovable fixing bush and spring-loaded movable one are provided with groves to receive guiding extensions of piston-shaft assembly. ^ EFFECT: increased operational reliability due to elimination of load necessary for whipstock rotation. ^ 3 dwg