E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/4
E21B 34/12 (2006.01) E21B 47/10 (2006.01) E21B 49/00 (2006.01) E21B 34/00 (2006.01)
Patent
CA 1269924
Abstract of the Disclosure A well tool having reciprocating portions can be locked in a predetermined position by a latching mechanism which is responsive to externally applied pressure, as opposed to mere movement of the reciprocating elements to the predeter- mined position. The actuating pressure can be applied through the annulus or through a pipe string in which the tool is located.
519061
Haliburton Company
Maclaughlin Scott T.
Swabey Ogilvy Renault
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