The present invention relates to a punching tool for providing a hole in a metal casing in a borehole. The punching tool comprises a tool body having an axial extension, and a punching unit connected with the tool body comprising: a fluid inlet, a punch movable between a retracted and a projected position and extending substantially radially in relation to the axial extension, and at least one hydraulic punch cylinder moving the punch between the retracted and the projected position. The present invention further relates to a method for providing a hole in a metal casing downhole.

There is disclosed a deformable member, in particular for use in a well tool for use in downhole oil/gas wells. In one embodiment, a deformable member (46) is described which is deformable between undeformed and deformed positions, and comprises a generally hollow cylindrical body (48) defining a wall (50). The wall (50) includes three circumferential lines of weakness in the form of grooves, with two grooves (52,54) provided in an outer surface (56) of the member wall (50), and the other groove (58) provided in an inner surface (60). The member (46) is deformed outwardly by folding about the lines of weakness (52,54,56) and is used in particular to obtain sealing contact with a tube in which the member (46) is located.

A communication tool (100) for communicating hydraulic fluid through a tubing retrievable safety valve (50) is disclosed. The tool (100) has a first section (102) and a second section (132) that are initially coupled together. A set of axial locating keys (112) is operably attached to the first section (102) and is engagably positionable within a profile (62). A radial cutting device (148) is radially extendable through a window (152) of the second section (132). A circumferential locating key (140) is operably attached to the second section (132) and is engagably positionable within a pocket (66) of the safety valve (50) when the first and second sections (102, 132) are decoupled, thereby circumferentially aligning the radial cutting device (148) with the non annular hydraulic chamber (60).

There is disclosed a deformable member, in particular for use in a well tool for use in downhole oil/gas wells. In one embodiment, a deformable member (46) is described which is deformable between undeformed and deformed positions, and comprises a generally hollow cylindrical body (48) defining a wall (50). The wall (50) includes three circumferential lines of weakness in the form of grooves, with two grooves (52,54) provided in an outer surface (56) of the member wall (50), and the other groove (58) provided in an inner surface (60). The member (46) is deformed outwardly by folding about the lines of weakness (52,54,56) and is used in particular to obtain sealing contact with a tube in which the member (46) is located.

Double shearing rams 28 designed for use in a standard ram-type blowout preventer 10 used in oil and gas drilling and workover operations are disclosed. The double shearing rams include an upper shear ram 30 and a mating lower shear ram 32. The upper shear ram includes an upper cutting blade 58 and a lower guide blade 60 spaced to form a cavity 62 therebetween. The cavity is sized to receive the lower ram's cutting blade 42 in close fitting engagement when the rams are closed. The upper shear ram 30 has a primary cutting edge 66 formed on its leading edge and a secondary edge 68 vertically and axially displaced from the primary cutting edge. During shearing operations, initial movement of the shear rams 28 (30,32) allows the upper shear ram's primary cutting edge 66 to cooperate with the lower shear ram's cutting blade 42 to make an initial shear of the member or members in the blowout preventer's bore 14. Further closing of the shear rams allows the upper shear ram's secondary cutting edge 68 to cooperate with the lower shear ram's cutting blade 42 to make a second shear of any remaining member or members in the blowout preventer's bore. A plurality of guide pins 34 positioned on the upper shear ram 30 and the lower shear ram 32 notched cutting edge 46 cooperate to maintain the members to be sheared between the upper and lower shear rams 28 (30,32).

A ball valve which can be used to cut coiled tubing extending therethrough, includes a ball (154) rotatably disposed within a housing and adjacent to a seat (152). Control arms (156,158) prevent relative longitudinal movement between the ball (154) and seat (152). The ball defines a pair of slots (202,204) therein, each slot having a bearing surface. A pair of control pins (164,166) are disposed on opposite sides of the ball and rotatably disposed in corresponding control frames (160,162) disposed on opposite sides of the ball. Each control pin (164,166) has an end (208) with a bearing surface (206,212) thereon extending into a corresponding slot (202,204) in the ball so that flat contact is provided between the control pin and the ball. This greater area of contact between the pins (164,166) and the slots (202,204) allows a greater load to be transmitted to the ball to provide the shearing load necessary to shear relatively large diameters of coiled tubing which extend through the open valve. The valve is opened and closed by pressure actuation of a piston.