Method and apparatus for releasing a coiled tubing internal conduit from a bottom hole assembly
AssigneeBaker Hughes Incorporated
InventorManfred Sach
Life of this patent
Estimating the term…
Abstract
A method and apparatus for releasing a coiled tubing internal line from a bottom hole assembly. The internal line may not have strength sufficient to permit the application of a tension force at the surface to disconnect the internal line from the bottom hole assembly. The bottom hole assembly may include a ball seat adapted to retain a ball permitting the application of a pressure differential above and below the ball seat. An anchor assembly connected to the internal line may be adapted to disconnect from the bottom hole assembly upon the application of predetermined pressure differential. A predetermined pressure differential may be used to shear a portion of the internal line releasing an upper portion of the internal line from the bottom hole assembly.
Claims15
A system to selectively connect an internal line within coiled tubing to a bottom hole assembly connected to the coiled tubing, the system comprising:
- an anchor assembly connected to the internal line, the anchor assembly being selectively connected to the bottom hole assembly;
- a piston movable between a first position and a second position, the piston being selectively connected to the anchor assembly;
- and
- at least one shearable device configured to retain the piston in the first position;
- wherein at a predetermined pressure the piston is adapted to shear the shearable device and move to the second position;
- wherein the movement of the piston releases a portion of the anchor assembly and the internal line from the bottom hole assembly.
A method of releasing an internal line within coiled tubing from a bottom hole assembly connected to the coiled tubing, the method comprising:
- pumping an object down the coiled tubing;
- seating the object on a seat portion of the bottom hole assembly, wherein the seated object prevents fluid flow through the bottom hole assembly;
- pumping fluid down the coiled tubing to increase pressure within the coiled tubing;
- releasing the internal line from the bottom hole assembly at a predetermined pressure within the coiled tubing.
Dependencies are inferred from the claim text.