Patent ID: 9677357
Date: 2017-06-13
CPC Classifications: E21B

Claim:
1. A lock assembly for a subterranean tool, comprising: a mandrel supporting an outer assembly for selective relative movement therebetween; a lock comprising a movable sleeve and a plurality of attached collet heads configured to releasably engage at least one object delivered to said mandrel, said movable sleeve selectively retaining at least one dog extending into said mandrel and said outer assembly for preventing relative movement therebetween for running in; said movable sleeve and said at least one object located on said plurality of collet heads movable in tandem with pressure applied to remove support for said at least one dog to permit relative movement between said mandrel and said outer assembly for operation of the tool after running in; said plurality of collet heads movable axially into a first surrounding supporting diameter, thus releasing said at least one object, enabling said relative movement between said mandrel and said outer assembly, and enabling engagement of at least another object on said collet heads; said plurality of collet heads further movable into a second surrounding supporting diameter, which is larger than said first surrounding supporting diameter, thus enabling said at least another object to pass through said plurality of collet heads and enabling locking of said mandrel and said outer assembly against said relative movement; and said movable sleeve further movable to return to a supporting position for said dog extending into said mandrel and said outer assembly to prevent subsequent relative movement between said mandrel and said outer assembly in response to a mechanical force applied to either said mandrel or said outer assembly.