Provided is a junction, a method for forming a junction, and a well system including a junction. The junction, in one aspect, includes a first threaded member, the first member formed of a first material, and a second threaded member threaded with the first threaded member, the second threaded member formed of a second material. In one or more aspects, the first and second threaded members define an overlapping space. In one or more other aspects, an expandable metal joint is located in at least a portion of the overlapping space, the expandable metal joint comprising a metal configured to expand in response to hydrolysis.

A downhole tool including a tubular member having an outer surface and an inner surface defining a flow bore. An expandable member is arranged on the outer surface. The expandable member is selectively radially outwardly expandable. An activation mechanism is operatively connected to the expandable member. The activation mechanism is operable to radially outwardly expand the expandable member. A control line extends along the outer surface and over the expandable member. A control line guidance system is operable to shift the control line radially outwardly from the outer surface.

A liner running tool includes a mandrel having a wall including outer surface and an inner surface defining a passage. A projection extends radially outwardly of the outer surface. The projection is formed from a material having a selected melting point and being configured to connect with and support a liner. A thermal activation device is operatively connected to the projection. The thermal activation device is selectively operable to melt the projection and disconnect the liner running tool from the liner.

Downhole hanger systems and methods for hanging a first structure from a second structure in downhole environments are described. The systems include a first structure and a second structure, with the first structure disposed within the second structure. A composite joint is arranged on an outer surface of the first structure. The composite joint is formed of a material configured to be fused to both the first structure and the second structure and form a hanger joint having a shear strength of at least 2 ksi when the material is fused to the outer surface of the first structure and an inner surface of the second structure.

A system and method for performing subterranean operations. The system may comprise an expandable liner hanger positioned within a casing string, wherein the expandable liner hanger comprises a spiked portion having one or more anchoring ridges, each of the one or more anchoring ridges extending in a circular ring along an outer perimeter of the expandable liner hanger, and one or more weep holes are positioned in a space between adjacent ones of the one or more anchoring ridges. The method for coupling a liner to a casing string of a cased wellbore in a subterranean formation may comprise coupling an expandable liner hanger to the liner, inserting the liner and the expandable liner hanger downhole through the casing string, and expanding the plurality of anchoring ridges.

Downhole hanger systems are described. The downhole hanger systems include a first structure having an outer surface, a second structure having an inner surface, wherein the first structure is disposed within the second structure, and at least one rib set is arranged on the outer surface of the first structure and configured to be engageable with the inner surface of the second structure. The at least one rib set includes a first rib having a first rib height and a second rib having a second rib height that is less than the first rib height.

A downhole expandable liner hanger positioned in a subterranean wellbore. The liner hanger may comprise a liner and an expansion element. The expansion element may comprise one or more seal elements bonded to the expansion element in an open-ended containment system, wherein each of the one or more seal elements is a nanoreinforced rubber element comprising a polymer host and a plurality of nanostructures.

A resource exploration and recovery system including a first system, and a second system extending into a wellbore. The second system includes a completion having a casing defining a wellbore internal diameter. Chemical injection tubing extends from the first system into the completion. The chemical injection tubing includes a terminal end portion. A chemical introduction system is arranged at the first system and fluidically connected to the chemical injection tubing. The chemical introduction system is operable to deliver a chemical into the chemical injection tubing. A chemical injection assembly is mounted to the terminal end portion. The chemical injection system includes an anchor system operable to secure the chemical injection assembly to the casing.

A resource exploration and recovery system includes a first system and a second system extending into a wellbore. The second system includes a completion having a casing defining a wellbore internal diameter. Chemical injection tubing extends from the first system into the completion. The chemical injection tubing includes a terminal end portion. A chemical introduction system is arranged at the first system and fluidically connected to the chemical injection tubing. The chemical introduction system is operable to deliver a chemical into the chemical injection tubing. A chemical injector assembly is mounted to the terminal end portion. The chemical injector assembly includes a propulsion system.

Drilling tools are frequently subject to rotation with respect to the central drilling axis caused by torque. A mechanical linkage can be configured to apply force that is proportional to the weight-on-bit on the borehole surface while transmitting axial loads used to generate weight-on-bit. The device can be used to manage drill string twist that could lead to drilling dysfunctions.