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US 5,059,043 AGranted
Blast joint for snubbing unit
AssigneeVermont American Corporation
InventorKarl F. Kuhne
Life of this patent
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Abstract
A blast joint for use with a snubbing unit includes a casing around the protective rings and means for sealing around the bottom of the rings between the tubing and the casing.
Claims5
A blast joint, comprising:
- a lower tubing member;
- an upper tubing member;
- a plurality of wear-resistant rings concentrically located around the upper tubing member, the rings abutting each other;
- an outer casing surrounding at least some of the rings;
- a substantially cylindrical adapter for providing a seal between the outer casing and the lower tubing member below the rings, the substantially cylindrical adapter being in threaded, sealing engagement with the lower tubing member and defining inner threads and outer threads at its upper end;
- wherein the inner threads of the adapter sealingly engage the lower portion of the upper tubing member;
- the outer threads of the adapter sealingly engage the lower portion of the outer casing;
- and the rings are supported by the adapter between the upper tubing member and the casing.
5 more elements
A blast joint comprising:
- a tube;
- a plurality of wear-resistant rings concentrically located around said tube, said rings abutting each other;
- an outer casing surrounding at least some of said rings;
- and
- an adapter including means for sealing between the tube and the outer casing below the rings and means for supporting the rings, wherein the means for supporting the rings includes a flat upper surface on the adapter which is fixed relative to the tube and on which the lowermost ring rests, and the adapter is threaded onto the tube.
2 more elements
Dependencies are inferred from the claim text.