Pipe joints or couplings – Frangible element
Patent
1979-09-04
1981-10-20
Arola, Dave W.
Pipe joints or couplings
Frangible element
285 18, 285141, F16L 3500
Patent
active
042956650
ABSTRACT:
A pipe suspension system for suspending vertically oriented well casings within other well casings and being adapted particularly for well casing hanger systems especially adapted for underwater installation wherein casing hanger suspension systems may be installed at or near the bottom of the body of water. A releasable locking mechanism is employed which includes a self contracting expandable lock positioning ring that is transported during installation of an inner pipe by a physical interconnection with the inner well casing. The lock positioning ring functions to control a locking ring that transfers the weight of the inner pipe to the outer casing and further functions in a weight supporting capacity to assist the locking ring in supporting the weight of the inner casing. Upon raising of the inner well casing relative to the outer casing, the lock positioning ring retracts wtihin a receptacle provided in the inner casing so as not to interfere with casing removal.
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Arola Dave W.
Petroleum Designers, Inc.
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