Whipstock for oil and gas wells
Patent
·
OSTI ID:6419122
A whipstock is described for insertion into a well bore through a tubing string smaller in diameter than the diameter of said well bore to guide well bore tools and the like, said whipstock comprising: body means including a guide surface formed thereon; means on said body means for connecting said whipstock to a setting device for inserting said whipstock into a well bore; and setting mechanism on said whipstock for urging said whipstock into a predetermined position in said well bore to incline said guide surface with respect to the longitudinal axis of said well bore comprising leg means pivotally connected to said body means and engageable with a wall of said well bore to urge one end of said body means toward said wall of said well bore to incline said guide surface with respect to said axis, an actuating rod operably connected to said leg means for moving said leg means from a retracted position on said body means to an extended position to urge said whipstock into said predetermined position in said well bore, and a frangible coupling portion responsive to a predetermined tension exerted on said rod to separate said setting device from said whipstock to permit withdrawal of said setting device from said well bore.
- Assignee:
- Atlantic Richfield Co., Los Angeles, CA (United States)
- Patent Number(s):
- A; US 5222554
- Application Number:
- PPN: US 7-828258
- OSTI ID:
- 6419122
- Country of Publication:
- United States
- Language:
- English
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