US 12,385,355 B1 · Deep set wireline retrievable safety valve

Abstract

Disclosed embodiments relate to hydraulic safety valves for a well, which may be configured to close in the event of a loss of pressure for example. In embodiments, the safety valve may comprise a wireline retrievable safety valve (WRSV) configured for use within a tubing retrievable safety valve (TRSV) in a wellbore, for example to provide safety valve functionality in the event that the TRSV no longer functions properly. The WRSV may be configured to be operated using the hydraulic lines(s) of the TRSV, for example a control line and a balance line. In embodiments, a control piston of the WRSV may be in fluid communication with the control line through the TRSV, and a balance piston of the WRSV may be in fluid communication with the balance line through the TRSV. Related methods and systems are also disclosed.

Claims23

Dependent claims

A wireline retrievable safety valve for use in a tubing retrievable safety valve (TRSV) disposed downhole in a wellbore, comprising:

a body having a bore therethrough, a control port, and a balance port;
an operating piston;
a balance piston having a head and a rod;
and
a valve having an open position and a closed position;
wherein:
the control port is in fluid communication with a first side of the operating piston;
the balance port is in fluid communication with a first side of the balance piston head;
a second side of the operating piston and a second side of the balance piston head are configured to be in fluid communication with the wellbore through one or more wellbore pressure ports;
the balance piston rod extends outward from the first side of the balance piston head;
the balance piston rod is configured to be in fluid communication with the wellbore;
the operating piston and the balance piston are linked to move together;
and
the valve is configured so that sufficient pressure applied to the operating piston through the control port opens the valve.

11 more elements

Dependencies are inferred from the claim text.

Deep set wireline retrievable safety valve

Life of this patent

Deep set wireline retrievable safety valve

Life of this patent

Abstract

Claims23