An easy building-up hybrid rotary steerable drilling system includes a front supporting body, a weight-on-bit (WOB)-torque-on-bit (TOB) deflectable transmission joint and a deflection control system. The WOB-TOB deflectable transmission joint includes a universal joint. A front end of the front supporting body is fixedly connected to a drill bit, and a rear end of the front supporting body is fixedly connected to an outlet end of the universal joint. A front push-the-bit assembly is provided on a circumferential surface of the front supporting body. The deflection control system controls radial push-the-bit parts of the front push-the-bit assembly to push a borehole wall along a radial direction of the front supporting body, such that the front supporting body generates a deviation angle relative to an input shaft of the universal joint by taking a center point of the universal joint as a center, thereby controlling a drilling direction.

A downhole access tool for accessing a lateral branch of a wellbore includes a tool body, a sliding sleeve, and a deflector device including a deflector plate and a deflector actuator operatively coupled to the deflector plate. A central conduit extends axially through the downhole access tool. The sliding sleeve is slidable relative to the tool body in an axial direction between a closed position and an open position. In the closed position, the sliding sleeve restricts access through the opening. In the open position, the sliding sleeve permits access through the opening. The deflector actuator transitions the deflector plate between a deflection position and a passthrough position. In the deflection position, the deflector plate deflects tooling radially outward towards the opening. In the passthrough position, the deflector plate allows access axially through the central conduit.

Provided is a slotted orientation apparatus for use with a keyed running tool. The slotted orientation apparatus, in one aspect includes a tubular having a wall thickness (t), and a slot extending at least partially through the tubular, the slot having an angled portion coupled to an axial portion, wherein the slot radially extends around the tubular X degrees, wherein X is 180 degrees or less.

A deflection mechanism may include a first incline and a second incline for interacting with legs of a junction assembly to selectively deflect each of the legs in a desired direction in a multilateral wellbore system. The deflection mechanism may include a window assembly for a main borehole of the wellbore and having a selective-deflection profile positioned proximate to an entrance into a lateral borehole extending from the main borehole. One leg of the junction assembly may include a surface profiled corresponding to an angle of the first incline to deflect the leg toward the lateral borehole. Another leg of the junction assembly may include a surface profiled corresponding to an angle of the second incline to deflect the leg toward a whipstock assembly positioned internal to the window assembly.

A multilateral junction comprising a y-block and a port seal member. The y-block comprises a main bore, a lateral bore, and lateral port formed in the y-block. The port seal member is integrated within the main bore and has at least one of an opened, closed, and choked position. The multilateral junction also includes one or more gaskets configured to hydraulically isolate the lateral bore when the port seal member is in a closed position. The multilateral junction may further include a controller coupled to the port seal member for performing at least one of an opening, closing, and choking operation on the port seal member. The y-block is a single, machined object with the main bore and the lateral bore formed therein. The multilateral junction is useful in applications that require pressure tight seals and minimal restriction of the internal diameter of a main bore.

An apparatus and method for locating multiple windows in a wellbore. The windows are associated with lateral wells. The apparatus may include: a running tool connected to a work string, wherein the running tool contains an inner bore being located at a distal end of the running tool; a swing arm having a locating head, the swing arm being pivotally attached within an inner cavity in the running tool, wherein the locating head has a retracted position within the running tool and an extended position extending from the running tool, and wherein the locating head has a shearing surface at an aft end; a biasing member disposed within the inner bore, the biasing member configured to create a force in the direction of the locating head; a shearing rod operatively positioned within the inner bore and engaging a first end of the biasing member so that the shearing rod extends from the inner bore in the direction out of the inner bore towards the locating head, wherein the shearing rod contains a series of individual grooves; and wherein the shearing surface is configured to engage and shear the individual grooves of the shearing rod at a predetermined force in multiple, individual cycles.

A system and method for machine learning with physics-based models to predict multilateral well performance are provided. An exemplary method enables obtaining data associated with well completion, data associated with inflow control valves, and reservoir attributes of multilateral wells. Production scenarios are generated based on the data associated with well completion, the data associated with inflow control valves, and the reservoir attributes of the multilateral wells. The production scenarios are input into a physics-based model of the multilateral wells, and simulation data associated with the multilateral wells output from the physics-based model is obtained. A neural network based machine learning model is trained using the simulation data associated with the multilateral wells and target parameters associated with the multilateral wells, wherein the trained machine learning model is configured to predict multilateral well production parameters.

A wellbore intervention tool conveyance system includes an upper pipe injector disposed in a pressure tight housing. The upper injector has a seal element engageable with a wellbore intervention tool and disposed below the injector. The upper housing has a coupling at a lower longitudinal end. A lower pipe injector is disposed in a pressure tight housing, the lower housing has well closure elements disposed above the lower pipe injector. The lower housing is configured to be coupled at a lower longitudinal end to a subsea wellhead. The lower housing is configured to be coupled at an upper longitudinal end to at least one of (i) a spacer spool disposed between the upper pipe injector housing and the lower pipe injector housing, and (ii) the lower longitudinal end of the upper pipe injector housing.

A wellbore whipstock tool assembly includes a body that includes an uphole axial surface that is slanted from one portion of an edge of the uphole axial surface to another portion of the edge of the uphole axial surface, a downhole axial surface opposite the uphole axial surface, and a radial surface between the uphole axial surface and the downhole axial surface; one or more keys formed on the radial surface and configured to secure into one or more keyholes formed in a casing of a wellbore; and a bore that extends between an opening in the uphole axial surface and an opening in the downhole axial surface, the bore sized to receive a bottom hole assembly of an intervention tool.

Provided is a multilateral junction. The multilateral junction, in one aspect, includes a y-block. The multilateral junction additionally includes a mainbore leg coupled to the y-block, the mainbore leg defining a second overlapping space, and a lateral bore leg coupled to the y-block, the lateral bore leg defining a third overlapping space. The multilateral junction, in this aspect, additionally includes an expanded metal joint located in at least a portion of the second overlapping space or the third overlapping space, the expanded metal joint comprising a metal that has expanded in response to hydrolysis.