Wells – Means for guiding insertable element laterally of well axis – Secured in operative position by movable means engaging well...
Patent
1992-01-30
1993-06-29
Britts, Ramon S.
Wells
Means for guiding insertable element laterally of well axis
Secured in operative position by movable means engaging well...
E21B 706
Patent
active
052225542
ABSTRACT:
A whipstock adapted for insertion into a wellbore through a tubing string having a smaller diameter than the wellbore casing or the open hole portion of the wellbore includes a setting mechanism comprising extendable legs which engage the wellbore wall to bias the whipstock into a position of inclination of the whipstock guide surface relative to the wellbore axis. The setting mechanism includes an actuating rod which may be actuated by a conventional downhole tool setting device to extend and retain the legs in their extended position. Cooperating ratchet means and tensionable couplings on the setting mechanism including a frangible coupling part permit actuation of the whipstock to its set position and retrieval of the setting device. The whipstock is releasable from the setting device by an adaptor having cooperating ball keys engageable with an adaptor actuating shaft and the upper end of the whipstock body.
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Blount Curtis G.
Ottoson Javan D.
Atlantic Richfield Company
Britts Ramon S.
Martin Michael E.
Tsay Frank S.
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