Patent ID: 11859466
Assignee: VIKING COMPLETION TECHNOLOGY FZCO
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 18:
19. A method according to claim 13 wherein the tool is a sub-surface safety valve, comprising a tubing retrievable flapper valve, and the inner sliding sleeve member is a flow tube of the sub-surface safety valve which is stuck in an open position and the method includes the steps of: venting a valve control line to atmosphere; at step (c) jarring up multiple times while measuring the control line returns; matching a returned fluid volume with an expected returned fluid volume for the valve to indicate that the flow tube and hydraulic piston of the valve are stroking up; and then releasing the apparatus as in step (d); functioning the valve by applying and bleeding off control line pressure; and measuring a volume of hydraulic fluid pumped into the valve to determine that it is fully opening and closing.