Ball actuated releasable coupling

Details Ball actuated releasable coupling Ball actuated releasable coupling

E - Fixed Constructions

21

B

166/62

E21B 23/00 (2006.01) E21B 17/06 (2006.01)

Patent

CA 1201379

ABSTRACT OF THE DISCLOSURE A releasable coupling has opposite ends adapted to be con- nected into a tool string or tubing string and run downhole into a borehole. A sealing member is passed down through the tubing string and allowed to become seated within the axial passageway of the releasable coupling. Pressure is applied through the axial passageway above the sealing member whereupon the differ- ential in pressure effected across the sealing member is also effected across a slidable piston reciprocatingly received within the releasable coupling. The piston moves into a position which enables a male member to be released and separated from a female member. When the male and female members are released and sepa- rated from one another, the lower part of the tubing string is disconnected from the upper part of the tubing string. -2-

439009

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