Abstract: Clutch assemblies and related systems are provided. In some embodiments, the system comprises the clutch assembly, a circulation assembly, and an actuation mechanism operatively connected to the clutch assembly and the circulation assembly. In some embodiments, the clutch assembly allows for selective rotation of a bottom hole assembly of a drill string and the circulation assembly allows for selective exhausting of drilling fluid from the drill string. Related drill strings and methods for drilling a borehole are also provided.

Abstract: Method of plugging a hydrocarbon well by a through-tubing technique are described. The method allows the tubing to be left in place. Only a short (<2 m) section is cut, milled, perforated, ruptured and expanded, or combinations thereof. A blocking device is sent downhole to block a bottom of the plug section, and bismuth alloy pellets dropped onto the blocking device. A heater is deployed to melt the bismuth alloy pellets. Next, the alloy liquid is allowed to cool and solidify. During solidification, the alloy expands and fills the section of well to be plugged or a portion thereof. Once primary and secondary barriers are in place, the well can be closed and the Christmas tree removed. A rock-to-rock plug can be set by removing or partially removing the tubular and outer casing, or just inner casing/tubulars can be removed if the exterior cement and casing are of sufficient quality.

Abstract: A directional drilling method applied to a rigid bending joint directional drilling device includes: obtaining geological data; determining a lateral drilling point and a target point of a branching borehole based on the geological data; drawing a target borehole trajectory of the branching borehole based on the lateral drilling point and the target point; obtaining parameters of the drill pipe; determining a propulsion force corresponding to the target borehole trajectory based on the parameters, the target borehole trajectory, and the geological data; and applying the propulsion force to the rigid bending joint directional drilling device for drilling the branching borehole. A directional drilling system and related devices are also disclosed.

Abstract: A liner hanger system for use in a subterranean well is disclosed. The liner hanger system comprises a well casing and a liner hanger. The liner hanger comprises a spike extending in an annular ring around an outer perimeter of the liner hanger. The spike comprises an annular groove defined therein. The liner hanger further comprises an annular seal positioned at least partially within the annular groove. The liner hanger is expandable to transition between an initial state where the spike is not in contact with the well casing and an expanded state where the spike is in contact with the well casing. The spike and the annular seal are configured to seal an uphole well portion from a downhole well portion when the liner hanger is in the expanded state.

Abstract: A downhole component can include a support body that includes a surface that defines at least a portion of a fluid passage; a composite matrix for scale mitigation supported by the surface of the support body where the composite matrix includes a lattice material that defines a lattice and magnetic material disposed in interstices of the lattice; and a cover layer disposed on the composite matrix.

Abstract: A method for determining a screen break includes receiving a fluid stream from a screen system of a fluid system into a screen break detector, wherein the screen system comprises at least one screen, and the screen break detector comprises a sample screen. The method also includes monitoring a fluid pressure of the fluid stream flowing through the sample screen of the screen break detector and detecting a condition of the at least one screen of the screen system based on the fluid pressure and one or more pressure thresholds. The method also may include outputting a notification of the condition of the at least one screen of the screen system. A system includes a screen break detector. The screen break detector includes a sample screen configured to receive a fluid stream from a screen system of a fluid system, wherein the screen system includes at least one screen and a pressure detector configured to monitor a fluid pressure of the fluid stream flowing through the sample screen.

Abstract: A shifting tool including a flow sleeve having a fluidic diode to facilitate flow from an exterior port to an interior port along the flow sleeve and restrict flow in the opposite direction. In a first configuration of the shifting tool, a flow path extends from the exterior of a case, via the exterior port, along the flow sleeve, and, via the interior port, to a flow bore of an operating mandrel. Upon exposure to a pressure differential between a cavity in which the flow sleeve is positioned and the flow bore above a threshold pressure differential, a shear pin breaks, such that the shifting tool assumes the second configuration. In the second configuration, the operating mandrel has shifted longitudinally whereby a snap ring extends into a recess or groove in an outside surface of the operating mandrel, to hold the operating mandrel in the second configuration.

Abstract: A downhole tool securing device and a frac plug which are excellent in setting properties and water pressure resistance and have excellent fracturing properties. A downhole tool securing device (slips) of a frac plug according to one embodiment of the present invention includes a button containing a powder metallurgy material and having a compressive elastic modulus of at least 13.5 GPa and a toughness of 0.23 GJ/m3 or greater and 1.0 GJ/m3 or less.

Abstract: A linear electromechanical actuator with a failsafe design may be used with a downhole flow control system. In one example, a subsurface safety valve for controlling flow of production fluids includes a valve closure element moveable between an open position and a closed position in response to a linear movement of an actuating member. A biasing member biases the valve closure element to the closed position. A power section with an electrically-powered motor drives a rotation. A drive section coupled to the power section converts the rotation of the motor to the linear movement of the actuating member to at least open the subsurface safety valve. A clutch selectively decouples the power section from the drive section in response to a power loss.

Abstract: Systems and methods for damping vibrations of downhole systems are described. The systems include a downhole component configured to be disposed downhole and a shock-damping system at least one of on or in the downhole component, the shock-damping system configured to reduce torsional oscillations of the downhole component by imparting a selected shock to the downhole component. The selected shock is selected to generate damping of the torsional oscillations of the downhole system.

Abstract: Aspects of the present disclosure relate to wellbore plugs, and specifically to pump down wiper plug assemblies used for conducting casing integrity pressure tests and completing wellbores. A plug assembly comprises one or more of a mandrel, a wiper, a dissolvable member, a rupture disk, and a movable sleeve. The dissolvable member and the rupture disk are configured to temporarily close fluid flow through an inner bore of the mandrel. The entire or only a portion of the outer surface of the dissolvable member comprises a protective coating.

Abstract: Provided is a downhole tool, a well system, and a method for forming a well system. The downhole tool, in at least one aspect, includes a two part drilling and running tool, the two part drilling and running tool including a conveyance, a smaller assembly coupled to an end of the conveyance, and a larger bit assembly slidably coupled to the conveyance, the smaller assembly and larger bit assembly configured to slidingly engage one another downhole to form a combined bit assembly. The downhole tool, in accordance with this aspect, further includes a whipstock assembly coupled to the two part drilling and running tool using a coupling mechanism, and a hydraulically actuated anchoring assembly coupled to a downhole end of the whipstock assembly. The downhole tool, in accordance with this aspect, additionally includes a multilateral junction seal assembly coupled between the whipstock assembly and the hydraulically actuated anchoring assembly.

Abstract: Provided is a multilateral junction and a well system. The multilateral junction, in one aspect, includes a housing, the housing including a first housing end and a second housing end, a bore extending through the housing from the first housing end to the second housing end, and a toothed coupling profile located along an inside surface of the bore proximate the second housing end. The multilateral junction, according to this aspect, further includes a multilateral bore leg extending into the bore, the multilateral bore leg including a tubular having a first tubular end and a second tubular end. The multilateral junction, according to this aspect, further includes a toothed coupling located between the bore and the tubular and engaged with the toothed coupling profile and the tubular to axially fix the housing and the multilateral bore leg relative to one another.

Abstract: Disclosed is a downhole tool and method suitable for geosteering within a lateral formation. The downhole tool includes a gamma sensor for monitoring gamma radiation within the lateral formation. The method provides for monitoring of the location of the drill bit or a RSS within a borehole and correcting the angle of inclination to maintain the drill bit or RSS within the target zone of the lateral formation.

Abstract: A drill bit for forming a wellbore through a geologic formation includes a connector configured for connection to a drill string and a bit body coupled to the connector. A fixed cutting element is mounted on the bit body for rotation with the bit body and a slot extends through the bit body. A rolling cutting blade is supported in the slot such that an exposed segment of the cutting blade protrudes from slot and concealed segments of the rolling cutting blade adjacent the exposed segment are disposed within the slot. The rolling cutting blade rotates to thereby conceal the exposed segment and expose the concealed segments. A plurality of rotating cutting elements are supported on a periphery of the rolling cutting blade.

Abstract: An annular pressure activated downhole tool has a housing including an outer surface, an inner surface defining a passage, an annular projection projecting into the passage from the inner surface, and an opening. A mandrel extends into the passage. The mandrel has a first end and a second end. A power spring support is detachably connected to the second end of the mandrel in the passage. A power spring is arranged about the mandrel and extends between the power spring support and the annular projection. A trigger housing is arranged in one of the mandrel and the power spring support. A trigger arranged in the trigger housing selectively engages with the inner surface. The trigger is operable to disengage from the inner surface of the housing, releasing the power spring, and shifting the mandrel along the passage when exposed to a selected annular pressure.

Abstract: An apparatus and method of drilling a wellbore using a drill string and a smart downhole system that comprises one or more downhole controllers and one or more downhole sensors. The method includes storing, in the downhole controller(s), a target efficiency parameter; drilling the wellbore using the drill string; and measuring, by the downhole sensor(s), a parameter. The method also includes, using the downhole controller(s) to: calculate an efficiency parameter based on the measured parameter; calculate a difference between the calculated efficiency parameter and the target efficiency parameter; generate first instructions to reduce the difference; and send to a surface controller, the first instructions. The method also includes generating, by the surface controller, second instructions based on the first instructions; and implementing, by the surface controller, the second instructions to reduce the difference between the measured efficiency parameter and the target efficiency parameter.

Abstract: A well path for a directional drilling device may be updated by determining a perturbation for a new well path from a current bottom-hole assembly position to a target using the initial well plan (or any well path of reference) as a reference. An initial well plan may be determined for a directional drilling device along with a current actual borehole position of a drilling device along with other parameters such as attitude. With this, a perturbation to the well plan based on the current actual borehole position of a drilling device and a subterranean target maybe determined. Based on this perturbation an updated borehole path may be determined.

Abstract: A section milling system may include an anchor secured to a downhole end of a coiled tubing. The anchor is configured to expand radially outward to set the anchor at a desired downhole position and restrain rotation of the coiled tubing. The section milling system also includes a reamer positioned downhole from the anchor. The reamer having extendable cutting arms configured to extend in response to fluid flowing through the reamer. Additionally, the section milling system includes a motor configured to rotate in response to fluid flowing through the motor, and rotation of the motor is configured to drive rotation of the cutting arms of the reamer to mill wellbore casing positioned adjacent the reamer. The section milling system further includes an actuation feature configured to move the reamer to mill along a wellbore in the uphole direction.

Abstract: 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.