Latching system for maintaining position of component within...

Details Latching system for maintaining position of component within... Latching system for maintaining position of component within...

E - Fixed Constructions

21

B

E21B 23/00 (2006.01) E21B 21/10 (2006.01) E21B 23/02 (2006.01) E21B 23/03 (2006.01) E21B 23/04 (2006.01)

Patent

CA 2467122

A latching system for maintaining the position of a component within a downhole drill string section during operation of a drill string. One preferred latching system embodiment has a shoe member including a cavity for receiving a component, a chamber opening into the shoe member cavity, an engagement member movable in the chamber between a retracted position and an engagement position, a first passage in fluid communication with the chamber and extending to an end surface of the shoe member, and a second passage extending from an outer side surface of the shoe member to the first passage. A pressure differential between pressure in the first passage and pressure in the second passage alters the position of the engagement member.

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