Wells – Above ground apparatus – With tube rotating means
Patent
1993-12-20
1995-02-14
Novosad, Stephen J.
Wells
Above ground apparatus
With tube rotating means
166 85, 166379, E21B 1900, E21B 3303
Patent
active
053886399
ABSTRACT:
An assembly for insertion in line into a pipestring of an oil well, for enabling manual rotation of the pipestring by one person. The assembly sits atop an existing well head, and is clamped thereto by a hammer nut. The assembly comprises a generally cylindrical housing having an internal shoulder and an external flange. Nested within the housing are, respectively, a bottom plate, a race and a bearing, a top plate, a resilient rubber washer, a rigid washer, and a threaded cap. These internal components all have a central opening through which passes a central section of tubing. This section of tubing is threaded at both ends, and extends beyond both ends of the cylindrical housing. The section of tubing has an external flange supported on the bearing, and supports the weight of a pipestring. The section of tubing threads above and below to existing threaded tubing. A handle clamps to the section of tubing above the housing, where it is accessible to oil field personnel, and the central tubing is rotated by this handle. The handle is folded down to engage projections formed in the cap, thus locking the pipestring at a selected position with respect to rotation. Rotation of the central tubing section rotates the attached pipestring. The cap can be tightly turned into the housing, so as to distend the resilient rubber washer, thus forming a seal against the housing and the central tubing section. Additional seals are provided about top and bottom plates, so that a supply of lubricant is retained by the bearing.
REFERENCES:
patent: 1650102 (1927-11-01), Tschappat
patent: 2294061 (1942-08-01), Williamson
patent: 2471198 (1949-05-01), Cormany
patent: 2595434 (1952-05-01), Williams
patent: 2599039 (1952-06-01), Baker
Betchan Stanley E.
Betchan Stanley G.
Litman Richard C.
Novosad Stephen J.
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