Ball Operated Back Pressure Valve
AssigneeHalliburton Energy Services, Inc.
InventorsDonald Winslow, Alton Branch
Life of this patent
Estimating the term…
Abstract
A method for selectively closing a downhole one way check valve, the method having the following steps: attaching the valve to a casing; locking the valve in an open configuration; running the casing and the valve into the wellbore; reverse circulating a composition down an annulus defined between the casing and the wellbore; injecting a plurality of balls into the annulus; unlocking the valve with the plurality of balls; and closing the valve.
Claims20
A method for selectively closing a downhole one way check valve, the method comprising:
- attaching the valve to a casing;
- locking the valve in an open configuration;
- running the casing and the valve into the wellbore;
- reverse circulating a composition down an annulus defined between the casing and the wellbore;
- injecting a plurality of balls into the annulus;
- unlocking the valve with the plurality of balls;
- and
- closing the valve.
A valve comprising:
- a plug removably connected to a housing;
- a plug seat;
- and
- a baffle having a plurality of holes;
- wherein when the plug is connected to the housing, the valve is in an open position, and fluid may flow through the valve;
- and
- wherein when the holes in the baffle become plugged, the plug becomes disconnected from the housing and moves into the plug seat, restricting flow through the valve.
A system for reverse-circulation cementing a casing in a wellbore, the system comprising:
- a valve comprising:
- a plug removably connected to a housing;
- a plug seat;
- and
- a baffle having a plurality of holes;
- wherein when the plug is connected to the housing, the valve is in an open position, and fluid may flow through the valve;
- and
- wherein when the holes in the baffle become plugged, the plug becomes disconnected from the housing and moves into the plug seat, restricting flow through the valve;
- a plurality of balls, wherein the balls are sized to cause the holes in the baffle to become plugged.
Dependencies are inferred from the claim text.