Double acting boost arrangement
AssigneeHalliburton Energy Services, Inc.
InventorMichael Adam Reid
Life of this patent
Estimating the term…
Abstract
A valve assembly, is presented that has a seating member is slidably coupled to a valve body adjacent a valve body bore and has a metal seat located on a seating end thereof that is engagable against a ball valve member. The seating member has a vent port located there through to allow fluid to flow into a fluid chamber within the ball housing. A first piston is slidably located between the seating member and the ball housing and located over the vent port, and a second piston is slidably located between the seating member and the ball housing and is located downhole from the first piston. Sealing members are located between the first and second pistons and engaged against the seating member.
Claims20
A valve assembly, comprising:
- a valve body having a ball housing with a valve body bore there through, the ball housing being coupled to a ball housing sub-assembly;
- a ball valve member having a bore there through and located in the ball housing for selective rotation between valve open and valve closed positions to control flow through the valve assembly;
- a seating member slidably coupled to the valve body adjacent the valve body bore and having a metal seat located on a seating end thereof that is engageable against a downhole side of the ball valve member, and having a vent port located there through to allow fluid to flow into a fluid chamber within the ball housing;
- a first piston slidably located between the seating member and the ball housing and being located on a same side of the ball valve member as the seating member and over the vent port;
- a second piston slidably located between the seating member and the ball housing and being located on the same side of the ball valve member as the seating member and further from the ball valve member than the first piston;
- and
- sealing members located between the first and second pistons and engaged against the seating member.
A well system, comprising:
- a string of tubing extending into a wellbore and connected to a valve assembly and being supported from a rig support structure, the valve assembly comprising:
- a valve body having a ball housing with a valve body bore there through, the ball housing being coupled to a ball housing sub-assembly;
- a ball valve member having a bore there through and located in the ball housing for selective rotation between valve open and valve closed positions to control flow through the valve assembly;
- a seating member slidably coupled to the valve body adjacent the valve body bore and having a metal seat located on a seating end thereof that is engageable against a downhole side of the ball valve member, and having a vent port located there through to allow fluid to flow into a fluid chamber within the ball housing;
- a first piston slidably located between the seating member and the ball housing and being located on a same side of the ball valve member as the seating member and over the vent port;
- a second piston slidably located between the seating member and the ball housing and being located on a same side of the ball valve member as the seating member and further from the ball valve member than the first piston;
- and
- sealing members located between the first and second pistons and engaged against the seating member.
Dependencies are inferred from the claim text.