Wireless casing packer
AssigneeMetrol Technology Limited
InventorsLeslie Jarvis, Shaun Ross, David Martin
Life of this patent
Estimating the term…
Abstract
A casing packer apparatus (P) comprising a mandrel (2) having a longitudinal throughbore, a packer element (6) mounted on the mandrel, and an expansion mechanism comprising a piston (11, 12) configured to move the packer element from a first position radially outwards to a second position. A bypass conduit (25) extends generally in said longitudinal direction, from one side of an outer sealing face of the packer element to an opposite side of the outer sealing face, and a bypass valve (41) controls said bypass conduit. The bypass valve is controlled by signals received via a wireless receiver (40). The casing packer can be deployed as an integral part of the casing string and used to control pressure build-up in the casing annulus.
Claims32
A casing packer apparatus comprising:
- a mandrel having a main longitudinal direction, the mandrel defining a throughbore in the main longitudinal direction;
- a packer element mounted on the mandrel, the packer element comprising an outer sealing face;
- a hydrostatic setting mechanism comprising a lock ring in a lock ring housing, a low-pressure chamber, an external port, and a piston being configured to be driven by well pressure against the action of the low-pressure chamber, the hydrostatic setting mechanism configured to move the packer element from a first position, radially outwards to a second position, and the lock ring configured to move with the piston and to resist return of the packer element from the second position;
- a bypass conduit extending generally in said longitudinal direction, from one side of the outer sealing face to an opposite side of the outer sealing face;
- a bypass valve controlling said bypass conduit;
- and
- a wireless receiver to receive wireless signals to control the bypass valve.
A casing packer apparatus comprising:
- a mandrel having a main longitudinal direction, the mandrel defining a throughbore in the main longitudinal direction;
- a packer element mounted on the mandrel, the packer element comprising an outer sealing face;
- a hydrostatic setting mechanism comprising a low-pressure chamber, an external port, and a piston being configured to be driven by well pressure against the action of the low-pressure chamber, the hydrostatic setting mechanism configured to move the packer element from a first position, radially outwards to a second position;
- a one-piece mandrel defining an internal static body of the low-pressure chamber and (a) providing a mounting for a wedge portion, or (b) including an integral wedge portion;
- a bypass conduit extending generally in said longitudinal direction, from one side of the outer sealing face to an opposite side of the outer sealing face;
- a bypass valve controlling said bypass conduit;
- and
- a wireless receiver to receive wireless signals to control the bypass valve.
A casing packer apparatus comprising:
- a mandrel having a main longitudinal direction, the mandrel defining a throughbore in the main longitudinal direction;
- a packer element mounted on the mandrel, the packer element comprising an outer sealing face;
- a hydrostatic setting mechanism comprising a first low-pressure chamber, a first external port, a first piston being configured to be driven by well pressure against the action of the first low-pressure chamber, a second low-pressure chamber, a drive chamber, a second external port associated with the drive chamber, and second piston configured to be driven, at least in part, by well pressure in the drive chamber against the action of the second low-pressure chamber, the hydrostatic setting mechanism configured to move the packer element from a first position, radially outwards to a second position;
- a bypass conduit extending generally in said longitudinal direction, from one side of the outer sealing face to an opposite side of the outer sealing face;
- a bypass valve controlling said bypass conduit;
- and
- a wireless receiver to receive wireless signals to control the bypass valve.
Dependencies are inferred from the claim text.