Abstract: A decoupling apparatus for use in a wellbore includes a top sub section and a bottom sub section rotationally coupled to the top sub section. The bottom and top sub sections are aligned along a decoupling apparatus axis. A torque ring is disposed between the top sub section and the bottom sub section. A method for decoupling a lower tubular section from an upper tubular section of a stuck downhole tubular string including the decoupling apparatus includes identifying the stuck downhole tubular string. A first torque is applied to an upper tubular section to rotate a top sub section from a first configuration to a second configuration. A second torque is applied to the upper tubular section to rotate the top sub section from the second configuration to a third configuration in which the top and bottom sub sections are decoupled from one another.

Abstract: A structural support apparatus for positioning in a downhole tubular string includes a support structure base and a liner ring having a first contact load surface in contact with a contact load surface of the base. A fastening mechanism is positioned between the base and the liner ring, where the fastening mechanism is configured to prevent movement of the liner ring relative to the base. A method for fastening a liner ring to a support structure apparatus in a downhole tubular string includes positioning a first contact load surface of the liner ring along a contact load surface of a support structure base. A second contact load surface of the liner ring is positioned along a frangible disk. A fastening mechanism is positioned between the base and the liner ring, where the fastening mechanism is configured to prevent movement of the liner ring relative to the base.

Abstract: Packer setting device, comprising a tubular (10) with a plug housing (14), said plug housing having an internal, through running boring (12) with an internal wall (12a), a breakable plug (16) seated in a load ring (22) axially movable within the boring (12) between a first position in where the plug (16) is with a distance to a breaking pin (18) and a second position in where the plug (16) is forced against the breaking pin (18), said load ring (22) is resting on a shear ring (20) with an annular shear lip (20a) to prevent axial movement in the first position until the shear lip (20a) is subjected to a force higher than a predetermined force, wherein the annular shear lip (20a) of the shear ring (20) extend radially inward in the boring (12), and the breaking pin (18) is resting on the shear ring (20), and said breaking pin (18) is accommodated in a pocket (28) on an outside of the load ring (22).

Abstract: A method for completion of an oil or gas well with production tubing (14), and a well tool device (1) comprising an first pipe part (20) and a second pipe part (22) each having a first end (20a, 22a), and a second end (20b, 22b) with a through channel (30), said well tool device (1) having a groove (24) provided in an interface in the through channel (30) between the first pipe part (20) and the second pipe part (22), wherein said groove (24) is accommodating a breakable obturator seat (10) made of brittle and tempered glass.