Wells – Above ground apparatus – With tube rotating means
Patent
1994-02-17
1995-06-27
Neuder, William P.
Wells
Above ground apparatus
With tube rotating means
E21B 4300
Patent
active
054271789
ABSTRACT:
A tubing rotator and hanger that attaches to a wellhead for suspending and rotating a tubing string contained in a wellbore. The tubing hanger comprises a support flange which mounts on the wellhead flange. The tubing rotator comprises a tubular outer member which engages the support flange, a tubular inner mandrel which is connected to the tubing string which is rotationally supported within the outer member, apparatus for rotating the inner mandrel which engage the inner mandrel at its upper end, and a housing mounted around the upper end of the inner mandrel for supporting the portion of the wellhead located above the tubing rotator. The rotating apparatus may be disengaged from this inner mandrel and the housing is removable so that a blowout preventer may be placed on top of the support flange and over the outer member and the inner mandrel and mounted on the wellhead without first moving the tubing string, and so that the outer member, the inner mandrel and the tubing string may be pulled through the blowout preventer to service the well. An adaptor is provided so that the rotating apparatus may be driven automatically by a rotating polished rod. The adaptor comprises a sleeve that fixedly mounts on the rotating rod, a shaft which engages the sleeve in order to be rotated as the sleeve rotates, and an adaptor housing for supporting the first shaft mounted about the sleeve so that the sleeve may rotate within the adaptor housing. The first shaft is connected to the rotating apparatus by a flexible second shaft, and the rotating apparatus includes a gearbox which creates a mechanical advantage so that rotation of the rotating rod rotates the inner mandrel and the tubing string.
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National Oilwell Canada Ltd., "Variperm Packers", catalogue, marked received Dec. 13, 1993.
Rotating Production Systems Inc., "Rotating Tubing Hangers", catalogue, undated, pp. 6-8.
Stream-Flo Industries Ltd., Wellhead Catalogue, undated, pp. 1-2, 14-20.
Graham, Marc and Brown, Charlie "Tubing Rotator System Increases Pumping Unit Tubular Life," Petroleum Engineer International, Oct. 1993, pp. 46-47.
Graham, Marc and Brown, Charlie "Tubing rotator reduces tubing wear in rod pumped wells", Oil & Gas Journal, Apr. 4, 1994, pp. 52-54.
Bock Specialties Inc., catalogue, undated, pp. 1-16.
Neuder William P.
Rodec Tool Company Inc.
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