Abstract: A tubing hanger includes a hanger connection profile positioned along a borehole of the tubing hanger and a first landing profile positioned along the borehole and above the hanger connection profile. The first landing profile includes first threads including a first thread feature configured to secure a first check valve to the tubing hanger for isolating a production tubing. The tubing hanger further includes a second landing profile positioned along the borehole and above the first landing profile, the second landing profile including second threads including a second thread feature. The second thread feature is larger than the first thread feature and is configured to secure a second check valve to the tubing hanger for further isolating the production tubing.

Abstract: An untethered device includes a tool and a ballast weight. The ballast weight includes an attachment plate that is securable to the tool, a dissolvable ballast, and attachment elements that secure the dissolvable ballast to the attachment plate. At least one of the attachment elements is dissolvable to release the dissolvable ballast from the attachment plate.

Abstract: An internal blowout-prevention gas-retaining connector has a body mounted at the bottom of a drill pipe. The body includes a valve pipe section and a connecting pipe section arranged from top to bottom. The bottom of the valve pipe section is inserted into the top of the connecting pipe section. The blowout-prevention valve seat is provided at a bottom end of the valve pipe section while a blowout-prevention valve bonnet is provided on a bottom surface of the valve pipe section. The edge of the blowout-prevention valve bonnet is rotatably connected to a bottom surface edge of the valve pipe section. A torsion spring is provided on a bottom surface of the blowout-prevention valve bonnet. One end of the torsion spring is connected to the bottom surface of the blowout-prevention valve bonnet while the other end is connected to the inner wall of the connecting pipe section.

Abstract: In general, in one aspect, embodiments relate to a method, that includes lowering a tool string down into a wellbore extending into a subterranean formation, where the tool string includes perforating charges, and one or more acoustic emitters, energizing the one or more acoustic emitters to form at least an acoustic signal while the tool string is being drawn up-hole, detecting the acoustic signal with a sensing cable disposed within the wellbore, determining an angular orientation of the tool string relative to the sensing cable based at least in part on the acoustic signal, and detonating at least one of the perforating charges when its firing direction is not directed at the one or more sensing cables.

Abstract: A fracturing apparatus, comprising: a plurality of portions to be heated; a heating system for heating each of the portions to be heated; and an auxiliary power unit, which is configured to at least provide power for a heating operation by the heating system. When the fracturing apparatus operates in a cold area, each of the portions to be heated can be heated by the heating system, so as to ensure the normal start-up and operation effect of the fracturing apparatus.

Abstract: A bending apparatus for coiled tubing protects along the entire path of coiled tubing from the reel to the injector, while still protecting a main controlled bend to the injector. The bending apparatus includes a conduit having a bend portion and a flexible portion. The main controlled bend is isolated in the bend portion, while smaller adjustment bends can be designated for the flexible portion. An impingement sleeve further protects and support coiled tubing within the conduit. The bend portion can be defined by an exterior support for the stability and strength of the bend portion, when the entire conduit is made of flexible material. A threader provides for safe loading from the reel to the conduit. A buckle preventer can be added to prevent damage after exiting the conduit. A blowout preventer can be added to cut and isolate the coiled tubing between the conduit and the reel.

Abstract: A system and method for a probe protector in a well includes a cable disposed within the well; a probe installed on an end of the cable; and a probe protector mounted on the cable conductor. The probe includes at least one lead and a cable conductor disposed on a distal end of each of the at least one lead. The probe protector is removably connected over the cable conductor. The probe protector is removed from the cable conductor prior to insertion of the cable into the well.

Abstract: Methods and systems for gasifying coal are disclosed herein. In some embodiments, a representative coal gasification system can comprise (i) an injection well extending from a ground surface to an underground coal gasification (UCG) reaction region of a coal seam; (ii) a production well spaced apart from the injection well and extending from the ground surface to the UCG reaction region, and (iii) conduits each extending from the ground surface to areas of the coal seam. End portions of the conduits within the coal can be laterally peripheral to the UCG reaction region. The conduits are configured to deliver a primary fluid from the ground surface to the primary region, the injection well is configured to deliver an oxidant gas to the UCG reaction region, and the production well is configured to deliver the product gas from the UCG reaction region to the ground surface.

Abstract: An apparatus for controlling tool face and methods of use with a torque generator connected to a drill string for drilling linear and nonlinear subterranean bore segments. In some embodiments, the apparatus and methodologies of use comprise a tool controller having an outer housing independently rotatable from and extension conduit extending therethrough and forming an annulus therebetween. The tool controller may provide for a first fluid pathway for allowing a bypass portion of fluids to flow through the torque generator, and a second fluid pathway through the annulus for allowing a torque generator portion of fluids to flow through the annulus. In some embodiments, at least one fluid flow restrictor may be provided within the annulus to controllable cause a cascading reduction in torque generator fluid pressure as it flows through the annulus, allowing high resolution tool face control over a larger (and tunable) range of drill string speed (rpm) set points.

Abstract: A reduced stroke gate valve is provided. The reduced stroke gate valve provides a predetermined or desired flow area for a given bore size through the gate valve while reducing a total length through which the gate valve strokes between an open position and a closed position. The reduced stroke gate valve includes one or more openings that span a non-circular or non-round area within the gate. The non-circular or non-round shape or distribution of opening(s) in the gate may provide a flow area equivalent to a predetermined flow area for a single circular hole that would otherwise be used for the gate valve application, but with a shape or distribution of opening(s) that provides a reduced stroke length to move the gate valve from the open position to the closed position.

Abstract: The invention relates to a rotary device (101) for a down-the-hole hammer (1), which rotary device is accommodated in a rotation motor housing (3) and mounted behind a drill housing (2) for transferring a torque to a drill bit (8) and a pressurized drive fluid (22) to a striking mechanism (4) for the drill bit. The rotary device includes a cam curve with a plurality of drive lobes (28:1-28:3) and working chambers (30:1, 30:2, 30:3) along a circumference in the rotation motor housing (3), a rotor disc (38) carrying a plurality of radially movable vanes (40:1-40:12), which are accommodated in piston tracks (41:1-41:12) in the rotor disc.

Abstract: A wellbore system includes an upper head and a lower head coupled to the upper head by one or more fasteners. The wellbore system also includes a seal ring positioned within a seal pocket to engage the upper head to form a first seal interface between the upper head and the seal ring. The wellbore system includes a hanger arranged within a bore. The wellbore system includes a packoff positioned between the hanger and the lower head. The wellbore system includes one or more lock screws to apply a downward force to the packoff to establish a second seal interface between the packoff and the seal ring and a third seal interface between the packoff and the hanger.

Abstract: A thermal recovery construction method includes the steps of determining design parameters of a current thermal recovery construction according to geological data and reservoir characteristics of a current oil deposit area to be stimulated; preparing, according to the design parameters, coal water slurry required for the current thermal recovery construction; injecting the coal water slurry into a target reservoir through an injection well with an injection mode of the design parameters, along with combustion adjuvant with an amount selected based on a total injection amount of the coal water slurry; and inducing spontaneous combustion of the coal water slurry by thermal energy generated by a downhole heating device, and performing control and displacement on the reservoir with the thermal energy and gas generated after the combustion.

Abstract: The present invention provides a downhole hydraulic directional control valve, comprising a valve body assembly having a shell, an outer tube being provided in the shell, a middle joint connecting the outer tube and an upper cylinder, an outer cylinder connected to the upper cylinder, and a double-way joint being provided with an oil inlet hole, and connecting top ends of the outer cylinder and an inner cylinder; a valve core assembly having an upper valve core, and a lower valve core being positioned at bottom end of the upper valve core and further positioned in a lower cylinder at bottom end of the middle joint; and, a plunger assembly having a first plunger part positioned in the inner cylinder and a second plunger part at bottom end of the first plunger part. By using this valve, the operation efficiency is improved, and the reliability of the equipment is ensured.

Abstract: A wellbore system includes a hanger lock energizing ring, a hanger lock ring, and a shoulder ring. The wellbore system further includes a seal energizing ring coupled to the shoulder ring. The wellbore system also includes a seal element being driven into an energized position by the seal energizing ring. The wellbore system further includes a seal lock energizing ring being driven to move via one or more extensions. The wellbore system includes a seal lock ring being supported, at least in part, by the seal energizing ring. Both the hanger lock ring and the seal lock ring are set, substantially simultaneously, responsive to movement of the one or more extensions.

Abstract: Methods and apparatus pertaining to scaling of the proportional gain and the integral gain in PI controllers of an autodriller based on drilling context. For example, a proportional gain and an integral gain are each determined for utilization by a PI controller of an autodriller controlling operation of equipment to be utilized for a drilling operation to drill a borehole into a subterranean formation. During the drilling operation, the integral gain is updated in real-time utilizing current values of drilling parameters that change with respect to time.

Abstract: A coiled tubing operating system and a coiled tubing operating method are provided, which relate to a technical field of coiled tubing. The coiled tubing operating system includes: an injector assembly for lifting or lowering a coiled tube; a suspending device for suspending the injector assembly; a reel assembly for feeding the coiled tube to the injector assembly, and for rewinding the coiled tube from the injector assembly; and a circuit control system connected to the injector assembly and the reel assembly, for controlling movements of the injector assembly and the reel assembly. The system can ensure the stability of the coiled tubing, the precision of equipment control, and reduction of the environment pollution.

Abstract: A homogenizer for homogenizing flow, a rock drilling rig, and a method for taking samples is provided. The homogenizer is mountable to a dust collecting system of the rock drilling rig and is arranged for effecting on the flow, which contains air and drilling cuttings. The homogenizer includes a channel part through which the flow is directed and at least one air jet for directing air blows to the flow for generating disturbance in the flow and to thereby homogenize particle distribution of the drilling cuttings in the flow.

Abstract: It is desirable to prevent the unintended generation of electricity by permanent magnet motors in a submersible pumping system used to recover fluids from a wellbore. A pumping system designed to prevent the unintended generation of electricity includes a pump intake that provides a path for the wellbore fluids to enter the pump. The pumping system further includes a flow control valve assembly connected to the pump. The flow control valve assembly has a sliding sleeve and a valve control mechanism that moves the sliding sleeve between open and closed positions on the intake of the pump.

Abstract: A wellhead assembly includes a production tree, a sacrificial fluid control assembly, an adaptor assembly, and a sleeve. The sacrificial fluid control assembly is fluidly coupled to the production tree. The adaptor assembly resides between the production tree and the sacrificial fluid control assembly. The adaptor assembly forms, with the adaptor assembly attached to the production tree and the sacrificial fluid control assembly, a common bore. The sleeve is disposed within the common bore and extends from the adaptor assembly to the tubing spool. The sleeve includes i) a first end that forms, with the adaptor or the sacrificial fluid control assembly, a first fluid seal, and ii) a second end opposite the first end and forming, with the tubing spool, a second fluid seal such that the sleeve fluidly isolates a first section of the common bore from a second section of the common bore.