Patent ID: 11891879
Assignee: PRAGMA WELL TECHNOLOGY LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 27:
28. A method of operating the assembly of claim 21, wherein the method comprises at least one of:
controlling the pump or other artificial lift system so that the pump or other artificial lift system operates above a threshold so as to cause a pressure differential between the annulus and the valve outlet or a pressure at a valve outlet, to thereby actuate the valve mechanism so as to open the flow path through the valve; or
controlling the pump or other artificial lift system so that the pump or other artificial lift system is inactive or operating below the threshold so as to reduce or remove the pressure differential between the annulus and a valve outlet, flow path or second pressure chamber of the valve, or to increase the pressure at the valve outlet to thereby actuate the valve mechanism so as to close the flow path.