Patent ID: 7748447
Filing Date: 2010-07-06
Classification: E21B

Abstract:
1. A torque anchor to prevent rotation of a tubing string in a first direction while allowing rotation of the tubing string in an opposite second direction, the torque anchor comprising: a substantially cylindrical body shaped for insertion into a downhole casing of a wellbore; and a moveable slip mounted on a periphery of the body, at least a portion of said slip being movable outwardly from a central longitudinal axis of the body, wherein the portion moves outwardly into operative contact with the downhole casing when the torque anchor is downhole and the tubing string is rotated in the first direction; at least two rigid slips fixedly coupled to the body, each of the at least two rigid slips being longitudinally aligned with the longitudinal axis of the body and circumferentially spaced from one another and the moveable slip, the at least two rigid slips dimensioned to permit operative contact with the downhole casing when the torque anchor is downhole and the tubing string is rotated in the first direction; and a connector constructed and adapted to attach a tube to the body between the at least two rigid slips, the connector dimensioned such that when the torque anchor is downhole, the connector and tube are contained within a fixed volume of space defined by the body, the at least two rigid slips, and the downhole casing.