Abstract: A technique facilitates selectively disengaging a running string from a lateral tube assembly. The running string comprises a running sub which is engageable with the lateral tube assembly. The running string further comprises a window finder which is positioned to extend into a main bore casing window when the running string is deployed downhole with the lateral tube assembly. Additionally, the running string comprises an extension sub which is coupled to the window finder. The extension sub is selectively extensible to disengage the window finder from the main bore casing prior to release of the running sub from the lateral tube assembly via a release force applied through the running string.

Abstract: A technique facilitates selectively disengaging a running string from a lateral tube assembly. The running string comprises a running sub which is engageable with the lateral tube assembly. The running string further comprises a window finder which is positioned to extend into a main bore casing window when the running string is deployed downhole with the lateral tube assembly. Additionally, the running string comprises an extension sub which is coupled to the window finder. The extension sub is selectively extensible to disengage the window finder from the main bore casing prior to release of the running sub from the lateral tube assembly via a release force applied through the running string.

Abstract: A technique facilitates deflecting a tubing string into a desired branch of a surrounding tubular structure. A deflector assembly is provided with a deflector tube, an orienting member, and a latching feature, such as latch dogs which are circumferentially disposed on the deflector tube in an asymmetrical pattern. The deflector assembly may be moved within the outer tubular structure, e.g. wellbore tubing, to a desired junction. The deflector tube and the latching feature are then oriented in an alignment sleeve of the surrounding tubular structure by moving the orienting member along a profile within the outer tubular structure. The latching feature is able to securely latch at the selected junction. The latching feature may use a pattern of latch dogs which matches a corresponding asymmetrical pattern of latch openings in the alignment sleeve.

Abstract: A technique facilitates deflecting a tubing string into a desired branch of a surrounding tubular structure. A deflector assembly is provided with a deflector tube, an orienting member, and a latching feature, such as latch dogs which are circumferentially disposed on the deflector tube in an asymmetrical pattern. The deflector assembly may be moved within the outer tubular structure, e.g. wellbore tubing, to a desired junction. The deflector tube and the latching feature are then oriented in an alignment sleeve of the surrounding tubular structure by moving the orienting member along a profile within the outer tubular structure. The latching feature is able to securely latch at the selected junction. The latching feature may use a pattern of latch dogs which matches a corresponding asymmetrical pattern of latch openings in the alignment sleeve.

Abstract: A technique facilitates selectively disengaging a running string from a lateral tube assembly. The running string comprises a running sub which is engageable with the lateral tube assembly. The running string further comprises a window finder which is positioned to extend into a main bore casing window when the running string is deployed downhole with the lateral tube assembly. Additionally, the running string comprises an extension sub which is coupled to the window finder. The extension sub is selectively extensible to disengage the window finder from the main bore casing prior to release of the running sub from the lateral tube assembly via a release force applied through the running string.

Abstract: A hammer bit retainer system includes a hammer bit locking mechanism arranged and designed to prevent decoupling of a driver sub from a hammer casing. The hammer bit locking mechanism includes an expandable split ring which is disposed in the coupling between the driver sub and hammer casing. The hammer bit locking mechanism prevents axial movement of the driver sub relative to the hammer casing in at least one direction.

Abstract: An improved cup packer for use on wellbore tools is disclosed. The open end of the cup packer bore is filled with an elastomer to prevent the intrusion of sand and debris into the space between the cup packer and the wellbore tool on which it is mounted. In an alternative embodiment of the invention, the packer body includes an angularly protruding section at at least one of its ends, wherein the longitudinal dimension of the packer body is at its maximum at its bore. In an additional alternative embodiment of the invention, the open end of the packer is sealed by a screen to prevent the intrusion of sand and debris into the space between the cup packer and the wellbore tool on which it is mounted.

Abstract: An improved cup packer for use on wellbore tools is disclosed. The open end of the cup packer bore is filled with an elastomer to prevent the intrusion of sand and debris into the space between the cup packer and the wellbore tool on which it is mounted. In an alternative embodiment of the invention, the packer body includes an angularly protruding section at at least one of its ends, wherein the longitudinal dimension of the packer body is at its maximum at its bore. In an additional alternative embodiment of the invention, the open end of the packer is sealed by a screen to prevent the intrusion of sand and debris into the space between the cup packer and the wellbore tool on which it is mounted.