A wellhead assembly includes a wellhead housing having a bore with a wellhead housing sidewall and a longitudinal axis. A hanger lands in the bore, the hanger having a hanger sidewall. Parallel circumferentially extending hanger sidewall ridges are located on the hanger sidewall. Each of the hanger sidewall ridges have upper and lower flanks that converge to a crest. Hanger sidewall bands are located between adjacent ones of the hanger sidewall ridges. A metal seal ring has an outer seal surface in metal-to-metal sealing engagement with the wellhead housing sidewall and an inner seal surface in metal-to-metal sealing engagement with the hanger sidewall bands. Crests of the hanger sidewall ridges embed into the inner seal surface to restrict relative movement between the hanger and the seal ring. A recess extends through each of the hanger sidewall ridges from the upper flank to the lower flank to allow any fluid trapped between the hanger sidewall ridges to flow out.

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.

Provided is a multilateral junction (MLT), a well system, and a method for forming a well system. The MLT, in one aspect, includes a y-block having a housing with a single first bore and second and third bores extending therein, the second and third bores defining second and third centerlines. The MLT, in this aspect, further includes a mainbore leg having a first mainbore leg end coupled to the second bore and a second opposing mainbore leg end, and a lateral bore leg having a first lateral bore leg end coupled to the third bore and a second opposing lateral bore leg end. In this aspect, the mainbore leg and the lateral bore leg are twisted with respect to the second and third bore such that a first plane taken through centerlines of the second opposing mainbore leg end and the second opposing lateral bore leg end is angled.

Provided is a multilateral junction, a well system, and a method. The multilateral junction, in at least one aspect, includes a mainbore leg having a first mainbore leg end and a second opposing mainbore leg end, as well as a lateral bore leg having a first lateral bore leg end and a second opposing lateral bore leg end. The multilateral junction, according to this aspect, further includes a lateral locating assembly coupled to the second opposing lateral bore leg end, the lateral locating assembly including: a tubular; and a bendable deflection tip coupled to the tubular, the bendable deflection tip configured to move between a straight position and a bent position upon the application of fluid pressure thereto.

Methods and systems for producing fluids from a subterranean well include forming the subterranean well having at least one lateral wellbore. The lateral wellbore is completed with a lateral production tubular. The lateral wellbore is subdivided into subsequent lateral segments. Each lateral segment is defined by a downhole lateral packer and an uphole lateral packer that seal an annular lateral space defined by an outer diameter surface of the lateral production tubular and an inner diameter surface of the lateral wellbore. A main production tubular extends into the subterranean well, the main production tubular including a lateral access system that provides selective access to the lateral wellbore. A flow of a fluid within the lateral segment is controlled with an inflow control device of the lateral segment. The inflow control device is mechanically adjusted by a tool that is delivered to the inflow control device through the lateral access system.

Provided is an inner string, an outer string, and a well system. The inner string, in one aspect, includes an inner tubular configured to extend at least partially within a seal surface of an outer tubular, the inner tubular including a sidewall having a thickness (t.sub.1). The inner string, according to one aspect, further includes an orientation port extending entirely through the sidewall to provide fluid access from an interior of the inner tubular to an exterior of the inner tubular, the orientation port configured to align with an orientation slot in the outer tubular that it is configured to engage with to provide a pressure reading indicative of a relative location of the inner tubular to the outer tubular.

Provided is a frac window system, a well system, and a wellbore stimulation method. The frac window system, in one aspect, includes an elongated tubular having a first end and a second end with an opening defined in a wall of the elongated tubular between the first end and the second end, the wall having an inner surface and an outer surface, wherein the opening in the wall is configured to align with a window of a wellbore casing. The frac window system, according to this aspect, may further include a polished bore receptacle coupled to the first end of the elongated tubular, the polished bore receptacle having an inside diameter (ID.sub.1) sufficient to engage with a high-pressure frac string.

A system can include a completion string with a tubing and a dip tube secured in the tubing. A gas is injected into an annulus between the tubing and the dip tube, and the gas and well liquids flow into the dip tube. A method can include installing a completion string including a tubing, a dip tube in the tubing, and a packer downhole of a gas lift valve, and flowing a gas into the tubing via the gas lift valve, into an annulus between the tubing and the dip tube, and then into the dip tube. Another system can include a tubular connector connected between adjacent sections of the tubing, with the dip tube secured in the tubing and connected to the tubular connector. A gas flows from the gas lift valve to the annulus via a gas flow path formed in the tubular connector.

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.

A wellbore isolation system is disclosed. The wellbore isolation system includes a junction positioned at an intersection of a first wellbore and a second wellbore, and a deflector disposed in the junction such that a path into the first leg of the junction is obstructed and engaged with the first leg of the junction to form a fluid and pressure tight seal. The junction includes a first leg extending downhole into the first wellbore, and a second leg extending downhole into the second wellbore. The deflector includes a channel extending axially through the deflector, and a degradable plug disposed in the channel and engaged with the channel to prevent fluid flow through the channel.