Portable well pipe puller

Claim 2

A well pipe puller comprising a U-shaped base having opposed legs defining an opening on one side of the base, attachment means on the base for securing the base to a well casing, and a wheel on the base having a well pipe-engaging surface facing said opening and positioned above said attachment means; and a support separable from said base having opposed edges extending along and removably mountable on said legs to close said opening, and a wheel rotatably mounted on said support having a well pipeengaging surface; locking means for securing said support and base together with the pipe-engaging surface of the wheel on the support above the attachment means on the base; and means for moving one wheel toward the other wheel to confine the pipe between the wheels and drive means for rotating one of said wheels to move the pipe relative to the casing.

Claim 3

A well pipe puller as in claim 1 including a pair of well pipe-engaging wheels on said base; and wherein all said wheels are pneumatic.

Claim 4

Apparatus as in claim 2 wherein said legs comprise U-shaped channel members each facing the opening and the edges of said frame extend into channels of said members.

Claim 5

A well pipe puller as in claim 2 wherein said means on the support comprises a member pivotally mounted on said support, bearings on said member with said wheel pivotally mounted in said bearings and means for pivoting said member and wheel abOut said pivot connection to move the wheel toward the wheel on the base.

Claim 6

A well pipe puller comprising a U-shaped base having a pair of opposed legs defining a support-receiving opening facing to one side of the base, a semi-cylindrical clamp channel on the base adapted to extend partially around the outer circumference of a well casing, locking means for securing said clamp channel to a well casing, a pair of well pipe-engaging wheels rotatably mounted on said base having adjacent circumferential portions defining a well-type receiving recess located above the clamp channel and facing toward said support-receiving opening, a support member separable from said base, a well pipe-engaging wheel on said support member, means slidably connecting the support member and the base legs whereby the support member can be positioned into the opening to a work position where the wheel on the support member is located adjacent said recess, locking means for securing the support member to the base in the work position, and means for moving the wheel on the support member toward said recess whereby a well pipe positioned in the recess is tightly confined between said three wheels, and drive means for rotating said wheels to move the well pipe relative to the casing.

Claim 7

A well pipe puller comprising a U-shaped base having a pair of opposed legs defining a support-receiving opening facing to one side of the base, a semi-cylindrical clamp channel on the base adapted to extend partially around the outer circumference of a well casing, locking means for securing said clamp channel to a well casing, a pair of well pipe-engaging wheels rotatably mounted on said base having adjacent circumferential portions defining a well-type receiving recess located above the clamp channel and facing toward said support-receiving opening, a support member separable from said base, a well pipe-engaging wheel on said support member, means slidably connecting the support member and the base legs whereby the support member can be positioned into the opening to a work position where the wheel on the support member is located adjacent said recess, locking means for securing the support member to the base in the work position, and means for moving the wheel on the support member toward said recess whereby a well pipe positioned in the recess is tightly confined between said three wheels, and drive means for rotating said wheels to move the well pipe relative to the casing.

Claim 8

A well pipe puller as in claim 5, wherein said connecting means comprises a channel and rail connection between the base and support member at each leg.