E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 19/00 (2006.01) E21B 19/10 (2006.01) E21B 33/068 (2006.01) B23P 21/00 (2006.01)
Patent
CA 2528161
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. Preferably, the load members are part of a high strength, lightweight unitary load plate which is mechanically fastened to an outer flange on the snubbing structure, and isolated from the wellbore fluids which permits the load plate's material properties to be selected without consideration of corrosion restrictions. More preferably, the hydraulic actuators are flanged and mechanically connected intermediate along their length to the load plate and manufactured so as to ensure 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.
Goodwin Mckay
Precision Drilling Corporation
LandOfFree
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