DOWNHOLE PACKER

摘要

A downhole packer includes a first locking member positioned at least partially around an outer surface of an oilfield tubular. The first locking member includes an inner surface that engages the outer surface of the oilfield tubular, and a tapered outer surface. A drive ring is positioned at least partially around the first locking member. The drive ring includes a reverse-tapered inner surface that engages the tapered outer surface of the first locking member. A first cap is movably coupled with the drive ring, disposed at least partially around the first locking member, and axially engaging the first locking member. Moving at least one of the first cap and the drive ring toward the other causes the drive ring to apply a radially-inward force on the first locking member, causing the first locking member to be secured to the tubular.

主权项

1. A downhole packer comprising:
a first locking member positioned at least partially around an outer surface of an oilfield tubular, the first locking member comprising an inner surface that engages the outer surface of the tubular, and a tapered outer surface; a drive ring positioned at least partially around the first locking member and comprising a reverse-tapered inner surface that engages the tapered outer surface of the first locking member; a first cap movably coupled with the drive ring, disposed at least partially around the first locking member, and axially-engaging the first locking member, wherein moving at least one of the first cap and the drive ring toward the other causes the drive ring to apply a radially-inward force on the first locking member, causing the first locking member to be secured to the tubular; and a sealing element configured to be disposed at least partially around the tubular and held in position at least axially with respect thereto by the first locking member engaging the tubular, wherein the sealing element is configured to expand radially-outward in response to application of an axially-directed, compressive force.