Frameless snubbing unit

Details Frameless snubbing unit Frameless snubbing unit

E - Fixed Constructions

21

B

E21B 19/00 (2006.01)

Patent

CA 2485202

A traveling slip assembly of a snubbing unit is supported directly through mechanical fastening of two or more hydraulic actuators to one or more load members extending from a tubular snubbing structure for transfer of snubbing loads to a wellhead. A stationary slip assembly is supported by the snubbing structure and is substantially independent from the hydraulic actuators. This arrangement ensures proper alignment of the traveling and stationary slip assemblies and the tubular snubbing structure enabling ease of assembly, precise alignment and a lighter overall structure. Preferably, the load members are part of a load plate which is mechanically fastened to an outer flange on the snubbing structure, and separate therefrom, thereby being isolated from the wellbore fluids and permitting the load plate's material properties to be selected without consideration of corrosion restrictions and thereby allowing a stronger and lighter load plate to be employed.

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