Patent ID: 11965394
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E  F

Claim 9:
10. A method of operating a valve assembly within a wellbore, comprising:
activating a fail-safe actuator comprising a main piston and an activation chamber containing a gas charge, wherein the main piston is sealingly coupled to the activation chamber and transmits a biasing force generated by the gas charge;
rotationally translating a valve to contact a workstring having a fluid passage by axially translating a ball support by the fail-safe actuator, wherein the valve rotates from an open position in response to the axial translating of the ball support;
shearing the workstring by the valve in response to the biasing force, wherein the valve rotationally translates into a shear position to shear the workstring into two portions, and wherein the main piston contacts the ball support and a limit shoulder when the valve is in the shear position; and
rotationally translating the valve from the shear position to a closed position by axially translating the ball support by one or more push rods sealingly engaged with the main piston, wherein the one or more push rods are biased by the gas charge, and wherein a first wellbore environment above the valve is isolated from a second wellbore environment below the valve when the valve is in the closed position.