Tubular cutting with debris filtration

摘要

A cut and pull spear is configured to obtain multiple grips in a tubular to be cut under tension. The slips are set mechanically with the aid of drag blocks to hold a portion of the assembly while a mandrel is manipulated. An annular seal is set in conjunction with the slips to provide well control during the cut. An internal bypass around the seal can be in the open position to allow circulation during the cut. The bypass can be closed to control a well kick with mechanical manipulation as the seal remains set. If the tubular will not release after an initial cut, the spear can be triggered to release and be reset at another location. The mandrel is open to circulation while the slips and seal are set and the cut is being made. Cuttings are filtered before entering the bypass to keep the cuttings out of the blowout preventers.

主权项

1. A spear and tubular cutter combination, comprising:
a mandrel rotatably mounted in an outer assembly for continuous rotation with respect thereto, said mandrel supporting a tubular cutter and having a flow passage therethrough; an anchor mounted to said outer assembly and configured to allow said outer assembly to enter the tubular to cut the tubular with a tensile force on the tubular applied through said mandrel to said outer assembly when said mandrel is held axially stationary that is of a magnitude to at least support the weight of a tubular segment being produced by said tubular cutter; said outer assembly further comprising a selectively operated flow diverter to direct fluid through said outer assembly in a bypass flow path around said flow diverter; and a debris retention device supported by one of said mandrel and said outer assembly and located between opposed ends of said outer assembly, through which fluid delivered through said flow passage to said cutter returns through said bypass flow path with cuttings retained by said debris retention device.