Compact cutting system and method
AssigneeWorldwide Oilfield Machine, Inc.
InventorsREDDI UDAYA BHASKARA RAO, TOM MCCREADIE
Life of this patent
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Abstract
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.
Claims24
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.
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;
- a first piston and a first piston rod operably connected to said first gate;
- a second piston and a second piston rod operably connected to said second gate, when said throughbore is oriented vertically then said first piston and said first piston rod is mounted to said housing at a higher vertical position than said second piston and said second piston rod.
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;
- a first piston and a first piston rod operably connected to said first gate, a second piston and a second piston rod operably connected to said second gate, said first piston and said second piston each comprise a piston surface with a diameter between one and one-half and two and one-half times as large as a diameter of said throughbore, said first piston rod and said second piston rod comprise a length less than two and one-quarter times as large as a diameter of said throughbore.
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;
- a first seat mounted in said throughbore adjacent said first gate, said first seat comprising a first seat interior, said first seat interior comprising decreasing in diameter with distance away from said first gate;
- and
- a second seat mounted in said through bore adjacent said second gate, said second seat comprising a second seat interior, said second seat interior decreasing in diameter with distance away from said second gate.
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, said first and second gates comprising openings therein that prevent sealing of said throughbore in said closed position;
- hydraulically operated pistons operatively connected said first gate and second gate being mounted to receive hydraulic fluid over each entire piston surface and to provide force to cut up to 4½ inch 16.60 lb/ft drill pipe.
Dependencies are inferred from the claim text.