Patent ID: 9416624
Filing Date: 2016-08-16
CPC Classification: E21B

Claim Text:
1. A method of locking open a safety valve, comprising: forming simultaneously a plurality of dimples in a flow tube of a safety valve using a lockout tool having a cam housing and a piston disposed within the cam housing, the lockout tool being configured to move relative to the cam housing parallel to a longitudinal up-down axis of the safety valve upon provision of a pressurized fluid within production tubing that is coupled to the safety valve, wherein the piston includes a piston body movable along the longitudinal up-down axis and a plurality of dimpling cams, each dimpling cam providing a high point and being rotatably coupled to the piston body such that the high point protrudes through the cam housing during a portion of rotation of the dimpling cam with respect to the piston body, and each dimpling cam being further configured to synchronously rotate as the piston body moves within the outer shell so that each dimpling cam makes non-sliding contact with the flow tube and the high point of each dimpling cam forms a dimple in the flow tube.