Drive system for turning a swivel

Details Drive system for turning a swivel Drive system for turning a swivel

E - Fixed Constructions

21

B

E21B 43/01 (2006.01)

Patent

CA 2117189

A system for turning a swivel or swivels aboard a vessel for oil extraction at sea, consisting of a stationary swivel pan connected to a rotary drilling rig on a vessel, and one or more rotating parts connected to the vessel. The rotating swivel parts are connected to a torsionally rigid frame structure (8) via a drive mechanism which transmits the rotary motion between the vessel and the swivel without angular displacement or significant reactive forces in the frame structure (8). The vertical frame structure (8) consists of four walls where one of the walls forms a gate (20) for the insertion and removal of a whole swivel or parts of a swivel. The frame structure (8) is attached to an overhead frame (7) which extends over the whole diameter of the rotary drilling rig and is secured to the hull of the vessel.

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