Motorized wellbore fishing tool
Patent
·
OSTI ID:5323117
This patent describes a fishing tool for retrieving an article located in a wellbore, wherein the fishing tool may be lowered into the wellbore by means connected to one end of the fishing tool. The fishing tool comprising: an elongated tubular body; an inner sleeve member secured to the body and extending axially within the body; a ball key disposed within each of the openings and movable at least partially into the bore in locking registration with a fishing head connected to the article; an outer sleeve member disposed in sleeved relationship around the inner sleeve member and movable axially between first and second positions with respect to the inner sleeve member. The outer sleeve member being operable to prevent, in the first position, radial outward movement of the ball keys out of the bore. The outer sleeve member including recess means formed thereon such that in the second position of the outer sleeve member the recess means is adjacent to the circumferentially spaced openings to allow limited radial outward movement of the ball keys; and means for axially moving the outer sleeve member between the first and second positions for engaging and releasing the fishing head with respect to the tool.
- Assignee:
- Atlantic Richfield Co., Los Angeles, CA
- Patent Number(s):
- US 4856582
- Application Number:
- PPN: US 7221831A
- OSTI ID:
- 5323117
- Country of Publication:
- United States
- Language:
- English
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