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US 4,056,145 AGranted
Hydraulic holddown for well packer stinger
AssigneeDresser Industries, Inc.
InventorsMarion Barney Jett, Dennis Mitchel Spriggs
Life of this patent
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Abstract
Hydraulic locking means is provided in a dual stinger latching mechanism which hydraulic locking means secures tubular conduit within the packer latching mechanism against pressure below the packer tending to pump the conduit out. The hydraulic locking means utilizes the pressure below the packer to activate a gripping means on the conduit which is subject to the upward pressure force.
Claims5
A relatch stinger mechanism for multi-string well packers, comprising:
- body means having bore passage means therethrough adapted to receive a plurality of conduit strings telescopically therein;
- latch means in said body means for securing the remainder of the conduit strings in said body means when one conduit string is removed therefrom;
- and,
- hydraulic lock means in said body means communicating with pressure acting below the well packer and adapted to be engaged in response to said pressure into restraining abutment with a conduit string in said bore passage means.
1 more element
Dependencies are inferred from the claim text.