Downhole perforating tool and method of use
First Claim
Patent Images
1. A perforating tool for perforating a downhole well casing, the tool comprising:
- a body arranged to be disposed in a well casing and at least one cutter block moveable relative to the body between an inwardly retracted condition and an outwardly deployed condition to cut a perforation in the well casing;
an activation member disposed in the body, wherein the activation member is moveable relative to the body to move at least one said cutter block between the inwardly retracted condition and the outwardly deployed condition relative to the body;
a plurality of pistons arranged to move the activation member relative to the body, each said piston being disposed in a respective pressure chamber; and
wherein the activation member defines a bore disposed along a longitudinal axis of the body, and wherein a plurality of ports are formed in the activation member to enable fluid to flow from the bore to each said pressure chamber such that an increase in fluid pressure in the body increases fluid pressure in each said pressure chamber to move each of the plurality of pistons relative to the body and cause the activation member to move relative to the body.
0 Assignments
0 Petitions
Accused Products
Abstract
A perforating tool usable in a well casing to perforate the well casing. Perforating tool includes an activation member disposed in body wherein the activation member is moveable relative to the body to move at least one working member between and inwardly retracted condition an outwardly deployed condition relative to the body. A plurality of pistons is arranged to move the activation member relative to the body, each piston being disposed in a respective pressure chamber arranged to be filled with fluid in response to an increase in fluid pressure in the body.
-
Citations
14 Claims
-
1. A perforating tool for perforating a downhole well casing, the tool comprising:
-
a body arranged to be disposed in a well casing and at least one cutter block moveable relative to the body between an inwardly retracted condition and an outwardly deployed condition to cut a perforation in the well casing; an activation member disposed in the body, wherein the activation member is moveable relative to the body to move at least one said cutter block between the inwardly retracted condition and the outwardly deployed condition relative to the body; a plurality of pistons arranged to move the activation member relative to the body, each said piston being disposed in a respective pressure chamber; and wherein the activation member defines a bore disposed along a longitudinal axis of the body, and wherein a plurality of ports are formed in the activation member to enable fluid to flow from the bore to each said pressure chamber such that an increase in fluid pressure in the body increases fluid pressure in each said pressure chamber to move each of the plurality of pistons relative to the body and cause the activation member to move relative to the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification