Hydraulic Tubing Perforator
AssigneeHalliburton Energy Services, Inc.
InventorsRobert Wayne Albers, Jason Karl Cook
Life of this patent
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Abstract
Methods and apparatus are presented for mechanically perforating a tubular positioned in a subterranean wellbore. A plurality of punch members are moved radially outward in response to hydraulic pressure from the tubing or other source into contact with the tubular. Retraction of the punch members is by biasing member or change in hydraulic pressure. A slip assembly, also hydraulically actuated, secures the tool in position during use.
Claims24
A method of mechanically perforating a downhole tubular positioned in a subterranean wellbore, the method comprising:
- running a mechanical perforator tool into the downhole tubular in the wellbore at a selected location, an annulus defined between the perforator tool and the downhole tubular;
- applying hydraulic pressure to act on a plurality of punch members movably mounted in the perforator tool;
- moving the plurality of punch members, in response to the hydraulic pressure, into contact with the downhole tubular;
- perforating the downhole tubular using the plurality of punch members;
- reducing hydraulic pressure acting on the plurality of punch members;
- and
- moving the plurality of punch members away from the downhole tubular.
A downhole, hydraulically actuated, mechanical perforator for perforating downhole tubulars in a wellbore extending through a subterranean formation, the perforator comprising:
- a tool housing;
- a plurality of punch members slidably mounted in the housing for movement between a radially retracted position and a radially extended position;
- at least one hydraulic passage defined in the housing, the at least one passage in hydraulic communication to actuate the plurality of punch members;
- at least one hydraulically actuable gripping assembly for grippingly engaging the downhole tubular.
Dependencies are inferred from the claim text.