Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1989-09-27
1990-09-04
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Processes
Bit detachable
51 34J, 51290, 408 81, 408103, B23B 4700
Patent
active
049540238
ABSTRACT:
A portable system for reworking the inside diameter of heavy oil field casing, and especially casing that has irregularities on the inner surface thereof that render the casing unsuitable for use in deep wells. A cutting head assembly is rotated as it is forced into the interior of a joint of casing. The cutting head assembly includes a mandrel which turns a special cutting device having a plurality of cutters of engaging and cutting the inner wall of the pipe as the entire cutterhead is forced to travel through the pipe. Alignment members attached to the mandrel on either side of the cutting device maintain the longitudinal axis of the cutters in proper alignment to produce the desired new pipe inside diameter. After the first half of the pipe is sized or trued, the joint of casing is reversed and the other half is cut to the same new desired inside diameter.
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Bates Marcus L.
Howell Daniel W.
Scott Tech International, Inc.
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