Provided, in one aspect, is a windowed deflector assembly. The windowed deflector assembly according to this aspect includes a tubular housing, the tubular housing having a window there through, a wrap covering the window, and a deflector coupled to or formed integrally as part of the tubular housing.

Provided, in one aspect, is an anchor for use with a downhole tool in a wellbore, a well system, and a method for anchoring a downhole tool within a wellbore. The anchor, according to this aspect, may include a base pipe, and two or more hydraulic activation chambers disposed radially about the base pipe, the two or more hydraulic activation chambers configured to move from a first collapsed state to a second activated state to engage with a wall of a wellbore and laterally and rotationally fix a downhole tool coupled to the base pipe within the wellbore.

Provided, in one aspect, is a well system and a method for forming a well system. The well system, in one aspect, includes a main wellbore, the main wellbore having a main wellbore open hole section, and a lateral wellbore extending from the main wellbore, the lateral wellbore having a lateral wellbore open hole section. The well system, according to this aspect, further includes a main bore completion located within the main wellbore and a lateral bore completion located within the lateral wellbore, and a multilateral junction positioned at an intersection between the main wellbore open hole section of the main wellbore and the lateral wellbore open hole section of the lateral wellbore, the multilateral junction including a main bore leg forming a first pressure tight seal with the main bore completion and a lateral bore leg forming a second pressure tight seal with the lateral bore completion such that the main bore completion and the lateral bore completion are hydraulically isolated from one another.

A deflector assembly for an object in a well. The deflector assembly may include a tubular housing and a core plug. The tubular housing may include a window through a wall of the tubular housing, a deflector below the window. The deflector may include a cavity extending through an axial length of the deflector and a deflector angled surface that is shaped to direct the object toward the window. The core plug may be removably coupleable within the cavity and include a receptacle and a second angled surface that is shaped to direct the object toward the window. The second angled surface is aligned with the deflector angled surface. The core plug may be coupleable with the deflector so as to rotate with the deflector.

A junction for use in a multilateral completion system is presented. The junction comprises a metal sealant applicable to a lateral component of the multilateral completion system. The metal sealant is expanding in response to hydrolysis and after activation forms a seal and an anchor with a well casing or tubing of the multilateral completion system. The metal sealant is expanding in response to one of an alkaline earth metal hydrolysis and a transition metal hydrolysis. More specifically, the metal sealant is expanding in response to one of magnesium hydrolysis, aluminum hydrolysis, calcium hydrolysis, and calcium oxide hydrolysis.

Thru-tubing completion systems and methods that employ a detachable sub-surface completion unit (SCU) anchoring seal that provides a seal between a SCU body and a wall of a wellbore of a well. The detachable SCU anchoring seal can be positioned in an un-deployed position that enables the detachable SCU anchoring seal to pass through production tubing disposed in the wellbore and in a deployed position that provides the seal. The detachable SCU anchoring seal is releasably coupled to the SCU body and has an internal passage having an internal diameter that is equal to or greater than an external diameter of the SCU body such that the detachable SCU anchoring seal can be deployed in the wellbore and decoupled from the SCU body to enable the SCU body to be moved through the internal passage of the SCU anchoring seal while deployed in the wellbore.

This disclosure provides a dissolvable sealing joint system that can be used in an improved method of sealing a multi-lateral well junction. The sealing joint system is comprised of a dissolvable junction subassembly that can be easily removed after a sealing operation is conducted. A tapered end of the dissolvable junction subassembly is inserted in a liner of a secondary wellbore, and a seal located about the tapered end is sealed against the top of the liner and a no-go shoulder of dissolvable junction subassembly. Once a seal is established, an isolation fluid is pumped into the junction area via a fluid port located in the dissolvable junction subassembly. A method of isolating a wellbore junction is also presented.

Provided are systems and methods for thru-tubing completion including a sub-surface completion unit (SCU) system including a SCU wireless transceiver for communicating with a surface control system of a well by way of wireless communication with a down-hole wireless transceiver disposed in a wellbore of the well, one or more SCU anchoring seals having an un-deployed position (enabling the SCU to pass through production tubing disposed in the wellbore of the well) and a deployed position (to seal against a wall of the target zone of the open-hole portion of the wellbore to provide zonal isolation between adjacent regions in the wellbore) and one or more SCU centralizers having an un-deployed position (enabling the SCU to pass through the production tubing disposed in the wellbore of the well) and a deployed position (to position the SCU in the target zone of the open-hole portion of the wellbore).

A unitary multilateral junction for deployment in a wellbore, wherein the multilateral junction permits electrical power and communications signals to be established in both a lateral wellbore and a main wellbore utilizing capacitive coupling and a cavity resonator. The unitary junction assembly generally includes a conduit with a first upper aperture, a first lower aperture and a second lower aperture where the first lower aperture is defined at the distal end of a primary passageway extending from a conduit junction and a second lower aperture defined at the distal end of a lateral passageway extending from the conduit junction. A lower wireless energy transfer mechanism in the form of a capacitive coupler is positioned along at least one of the passageways between the distal end of the passageway and the junction. A cavity resonator is adjacent the capacitive coupler to enhance the electric field signal of the capacitive coupler.

A junction system to line a lateral wellbore can include a junction assembly and a running tool. The junction assembly can include an anchor, a transition joint, a load transfer device, and a lateral liner. The running tool assembly can be configured to extend within a central bore of the junction assembly. The running tool assembly can include a setting tool to set the anchor and a locking device to permit transfer of axial or rotational force between the lateral liner and a work string.