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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 a

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.

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A wellhead tubing rotator, comprising: a generally cylindrical housing having an annular main wall having a first external flange, and defining at one end an interior shoulder, and defining at the other end threads; a bearing supported within said housing and above said interior shoulder; a cap havi

A wellhead tubing rotator, comprising: a generally cylindrical housing having an annular main wall having a first external flange, and defining at one end an interior shoulder, and defining at the other end threads; a bearing supported within said housing and above said interior shoulder; a cap having threads cooperating with said housing threads, whereby said cap is installed in said housing by threading thereto; a central tubing section rotatably supported by said bearing; a handle attachable to said central tubing section, whereby a person can grasp said handle and rotate said central tubing section; and a bottom plate defining a first central opening therein, said bottom plate disposed within said housing and below said bearing, said bottom plate supporting said bearing and partially surrounding said central tubing member.