US 12,467,336 B2
Tubing pressure insensitive subsurface safety valve
Mohamed Mohsen Mohamed Raffy, Singapore (SG); Agasthya Raghavan, Aberdeen (GB); Andrew James Kelbie, Carrollton, TX (US); and Michael Linley Fripp, Singapore (SG)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Feb. 6, 2024, as Appl. No. 18/434,527.
Prior Publication US 2025/0250880 A1, Aug. 7, 2025
Int. Cl. E21B 34/08 (2006.01); E21B 34/10 (2006.01)
CPC E21B 34/08 (2013.01) [E21B 34/10 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A subsurface safety valve, comprising:
a tubular housing having a first tubular housing end, a second tubular housing end, and a longitudinal opening extending at least partially from the first tubular housing end toward the second tubular housing end, the tubular housing having an inside diameter, an outside diameter, and a wall thickness (t);
one or more openings extending through the wall thickness (t) proximate the first tubular housing end, the one or more openings configured to provide a fluid path for wellbore fluids to flow into and through the tubular housing and uphole into a production tubular; and
a longitudinal valve having a first longitudinal valve end and a second longitudinal valve end positioned within the longitudinal opening, the longitudinal valve configured to move between a closed state preventing the one or more openings from providing the fluid path for wellbore fluids to flow into and through the tubular housing and uphole into the production tubular and an open state allowing the one or more openings to provide the fluid path for the wellbore fluids to flow into and through the tubular housing and uphole into the production tubular, the longitudinal valve including:
a first piston having a first piston surface area (SAP1), the first piston located more proximate the first longitudinal valve end than the second longitudinal valve end and configured to slide upon a first piston surface of the tubular housing as the longitudinal valve moves between the closed state and the open state;
a second piston having a second piston surface area (SAP2), the second piston located more near the second longitudinal valve end than the first longitudinal valve end and configured to slide upon a second piston surface of the tubular housing as the longitudinal valve moves between the closed state and the open state, the first piston surface area (SAP1) and the second piston surface area (SAP2) being substantially identical; and
a fluid flow path extending within and along the longitudinal valve, the fluid flow path entering the longitudinal valve between the first longitudinal valve end and the first piston and exiting the longitudinal valve between the second longitudinal valve end and the second piston, the first piston surface area (SAP1), the second piston surface area (SAP2), and the fluid flow path making the longitudinal valve insensitive to tubing pressure.