Wells – Processes – Assembling well part
Patent
1990-09-27
1992-02-11
Neuder, William P.
Wells
Processes
Assembling well part
166381, 166208, 175294, 175320, E21B 1706, E21B 1916, E21B 2302
Patent
active
050868438
ABSTRACT:
An oil tool release joint with a top sub that has a pin end which inserts into an opening in a bottom sub provides an alternative remote tool for separating pipe string segments after rotation. The subs are held together by shear pins which are wedged through holes in the bottom sub into recesses in the top sub. The bottom sub has uphole extending splines that engage slots in the top sub when the subs are connected. The splines and slots translate rotational motion from one sub to the other. The joint releases upon the application of a force sufficient to shear the shear pins either by hydraulic pressure in the drill string, an upward pull on the top sub or both. A guide ring encircles the uphole ends of the splines to guide material into the bottom sub when the joint is separated.
REFERENCES:
patent: 4064953 (1977-12-01), Collins
patent: 4611662 (1986-09-01), Harrington
patent: 4856591 (1989-08-01), Donovan et al.
Bunyak Michael J.
Jones Frank L.
Mims Michael G.
Mueller Mark D.
Jacobson William O.
Neuder William P.
Union Oil Company of California
Wirzbicki Gregory F.
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