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US 5,513,570 AGranted
Pressure actuated pipe cutting tool
AssigneeWestern Atlas International, Inc.
InventorPatrick M. Mulcahy
Life of this patent
Estimating the term…
Abstract
The present invention is a system for severing pipe. The system includes an explosively actuated pipe cutter, a pressure actuated initiator, and a means for suspending the cutter and the initiator inside the pipe and pressure sealing the interior of the pipe. In a particular embodiment of the invention, the initiator includes a time delay to enable reduction in pressure applied to the interior of the pipe for actuating the initiator.
Claims8
An apparatus for severing a pipe, comprising:
- a pressure actuated initiator adapted to generate an actuation signal upon application of a predetermined pressure to said initiator;
- a pipe cutter adapted to be actuated by said signal from said initiator;
- and
- an annular seal adapted to be substantially immovably engaged to the interior of said pipe, said annular seal operatively attached to said pipe cutter and said initiator so that engagement of said annular seal to the interior of said pipe affixes said pipe cutter and said initiator at a predetermined position inside said pipe, said annular seal adapted to enable pressure communication to said initiator from an upper end of said pipe and adapted to preclude pressure communication through said apparatus.
1 more element
A method of severing a pipe in a borehole comprising the steps of:
- lowering a pressure actuated pipe cutting apparatus including a pressure actuated initiator, a pipe cutter and an annular seal into the interior of said pipe;
- engaging said annular seal to the interior of said pipe;
- and
- applying pressure to the interior of said pipe until an actuation pressure of said initiator is reached, thereby actuating said initiator and said pipe cutter.
1 more element
Dependencies are inferred from the claim text.