Rotation mechanism
AssigneeCameron International Corporation
InventorsRobert Fern, Ted Thornburrow
Life of this patent
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Abstract
A system for rotating an element inside a pressure containing housing. In some embodiments, the mechanism includes a pressure containing housing having an opening through a wall of the housing into an internal chamber in which, in use, the element to be rotated is located, a bushing located within the opening, and a worm gear rotatably mounted in the bushing. The worm gear is offset from the axial centre of the bushing such that rotation of the bushing moves the worm gear between an extended position, wherein the thread of the worm gear engages an element in the chamber, and a retracted position, wherein the thread is disengaged from the element in the chamber.
Claims12
A system for rotating an element inside a high wellhead housing, the system comprising:
- a drilling adapter housing connectable to the high pressure wellhead housing, comprising an opening through a wall of the drilling adapter housing into an internal chamber in which, in use, the element to be rotated is located;
- a bushing located within the opening;
- a worm gear rotatably mounted in the bushing, the worm gear being offset from the axial centre of the bushing such that rotation of the bushing moves the worm gear between an extended position, wherein a thread of the worm gear engages the element in the internal chamber, and a retracted position, wherein the thread is disengaged from the element in the chamber;
- and
- wherein, in the extended position, the worm gear is configured to rotate the element 360° while allowing the element to move axially.
Dependencies are inferred from the claim text.