COMPACT CUTTING SYSTEM AND METHOD

摘要

As compared to a BOP, a compact lightweight cutting system comprises two gates with cutters moveable in opposite directions to cut drill pipe. In one embodiment, the system comprises a relatively short stroke and utilizes relatively less hydraulic oil for subsea operation. In one embodiment, an opening through the gates surrounds the wellbore in the open position. The cutting elements are mounted within the openings. The piston rods and pistons are vertically offset with respect to each other. The compact cutting system with a gate valve can be used to substitute for a BOP to significantly reduce the size and weight required in an intervention system.

主权项

1. A compact cutting system operable for cutting drill pipe, coiled tubing, and wireline, comprising:
a housing defining a throughbore; a first gate and a second gate mounted within the housing, said first gate and said second gate being moveable transversely with respect to said throughbore between an open position and a closed position, said first and second gates being moveable in different directions with respect to each other; and a first piston and a first piston rod operably connected to said first gate with a first stroke length, a second piston and a second piston rod operably connected to said second gate with a second stroke length, said first and second stroke length being less than a diameter of said throughbore.