Tool for installing units in a well

摘要

A tool for installation of units in connection with oil wells, comprising a housing (1) with an attachment device (12) for attachment to a well installation, a telescopic device (30, 31, 32) for extension of the tool, a torsional force transmission device (13) for rotation of an internal movable element (2) of the tool. The internal movable element (2) comprises a pressure face (21), which in an operative condition is exposed to a well pressure and a counter-pressure face (22), with a sealing arrangement (26) between the housing (1) and the internal movable element (2) provided between these pressure faces (21, 22) and devices (23) which are arranged in such a manner that a pressure can be applied to the counter-pressure face.

主权项

1. A tool for installation of units in connection with oil wells, comprising a housing with an attachment device for attachment to a well installation, an internal movable element comprising a telescopic device for extension of the tool, a torsional force transmission device for rotation of the internal movable element of the tool, where the internal movable element comprises a first pressure face, which in an operative condition is exposed to a well pressure and a counter-pressure face, with a sealing arrangement between the housing and the internal movable element provided between the first pressure face and the counter-pressure face, wherein the internal movable element further comprises a pressure balancing system which is arranged in such a manner that a pressure can be applied to the counter-pressure face, the internal movable element further comprising a return system for retracting at least one telescoped internally located part of the telescopic device to an initial position arranged substantially inside an outer part of the telescopic device of the movable element, the return system comprising at least one pair of opposite-facing internal pressure faces, at least one of the pair of internal pressure faces is disposed on the internally located part and at least the other of the pair of internal pressure faces is disposed on the outer part, and pressure devices for applying a pressure to the internal pressure faces which exert forces on the at least one telescoped internally located part, causing it to be retracted to the initial position.