Abstract: An example downhole power generation apparatus may include a turbine and a drive shaft coupled to the turbine. A plurality of alternators may be coupled to the drive shaft and electrically connected in parallel. When the drive shaft rotates, the plurality of alternators may generate phase-offset alternating current (AC) power signals. AC-to-direct current (DC) conversion circuitry may be coupled to the plurality of alternators.

Abstract: An intake for a downhole pump includes an outer tubular member having a central axis. In addition, the intake includes an inner tubular member disposed within the outer tubular member. The inner tubular member is radially spaced from the outer tubular member to form an outer annular flow path radially positioned between the inner tubular member and the outer tubular member. Further, the intake includes a central shaft rotatably disposed within the inner tubular member. The central shaft is radially spaced from the inner tubular member to form an inner annular flow path radially positioned between the central shaft and the inner tubular member. Still further, the intake includes a plurality of inlet apertures extending radially through the outer tubular member and in fluid communication with the outer annular flow path. Each of the plurality of inlet apertures has a circumferential width W between 5% and 50% of a total circumference of the outer tubular member.

Abstract: A filter assembly comprising a tubular member, one or more support members disposed on the tubular member, and a wire disposed on the support members. One or more spaces are formed between adjacent portions of the wire. The wire includes a wire shape having substantially flat side surfaces such that an elongated channel is formed between adjacent wire shapes.

Abstract: In at least some embodiments, a high-voltage drilling system includes a a power supply to output high-voltage power to an electrical conductor, a bit that extends a borehole based on the high-voltage power, and a hybrid drillstring that transports a fluid flow from the bit to convey detached formation material out of the borehole. At least part of the electrical conductor resides within the hybrid drillstring to convey power to the bit. The hybrid drillstring includes a coiled tubing section and a jointed pipe section.

Abstract: A coiled tubing injection and removal system includes an injector head forming a hollow cavity and configured to receive the coiled tubing therein the hollow cavity; a first chain assembly and a second chain assembly, both chain assemblies being secured within the hollow cavity and configured to engage and move the coiled tubing through the hollow cavity; and a first and second guide bar carried within the hollow cavity and configured to engage with and guide the coiled tubing in a direction relatively parallel with the first chain assembly and the second chain assembly.

Abstract: A sub assembly for coupling to a drill string, the assembly comprising; a mandrel; a sleeve arranged to be co-axially positioned about said mandrel; a first stop arranged to prevent axial movement of the sleeve along the mandrel in a first direction; a second stop arranged to prevent axial movement of the sleeve in a second direction; wherein said second stop is releasably engageable from the mandrel.

Abstract: A downhole tool (1) method and device, in which the downhole tool (1) is designed to form part of a pipe string (4), and in which a valve (24) is provided with a passage (120) for fluid, the passage (120) including an opening and closing mechanism (78), and the method including: connecting a first valve portion (26) to the pipe string (4); connecting a second valve portion (28) telescopic relative to the first valve portion (26) to a downhole object (20); pre-tensioning the first valve portion (26) and the second valve portion (28) in the direction of contraction to an initial position, in which the opening and closing mechanism (78) is open; and moving the first valve portion (26) relative to the second valve portion (28) in the direction of extension to close the opening and closing mechanism (78).

Abstract: In one aspect, an apparatus for use in a drilling assembly is disclosed that in one embodiment includes a flow control device that further includes: a fluid flow path having an inlet and an outlet; an electromagnetic circuit that includes a closing member made from a soft magnetic or magnetic material as a part of the electromagnetic circuit, wherein the closing member moves from a first open position to a second closed position to close the fluid flow path to produce a pressure pulse in a fluid flowing through the fluid flow path when the electromagnetic circuit is formed.

Abstract: A system and method for sealing around a fluid flow member includes a ram closing assembly. The ram closing assembly has a sealing chamber having a generally cylindrical shape when the ram closing assembly is in a closed position. A ram assembly is located at an end of the sealing chamber. The ram assembly has a pair of rams, each ram having an engaging surface, the engaging surface sized and shaped to seal around the fluid flow member. The ram assembly also has an actuating arm assembly connected to one of the rams and a ram body. The pair of rams is rotationally attached to the ram body.

Abstract: Degradable downhole tools, tool components, and balls are formed from a polyvinyl alcohol (PVA) compound. The PVA compound exhibits strength and elasticity properties that are comparable to existing degradable downhole polymers and further exhibits degradability properties that are superior to existing degradable downhole polymers. For different components, the PVA compound may include a reinforcing material such as fiberglass. Usage of tools, tool components, and balls formed from the disclosed materials eliminates the requirement that such equipment be drilled out after use as the PVA compound quickly degrades in standard downhole fluids.

Abstract: An assembly can include a filter body having an open end and a closed end. The filter body can also include a plurality of perforations. A fan may be positionable within the filter body. The fan may include a mount that extends along a length of the fan. A blade may be coupled to and extend from the mount. The fan may also include an outer edge of the blade for contacting an inner surface of the filter body.

Abstract: A downhole plug for use in oil and gas well completions made of [aluminum] magnesium, dissolves in natural wellbore fluids, has a dissolvable seal made of [aluminum] magnesium split rings or a degradable elastomer, has a backup pump out ring, and may be provided to the well site as an interchangeable parts kit for adaption to the well's requirements, provides an interventionless plug in a well.

Abstract: A rock drill bit includes a head provided at one end of an elongate shank. A plurality of fluid flushing passageways extend axially from an internal bore extending through the shank with at least one fluid flushing passageway having an exit end at the front face formed as an elongate slot having a length greater than a width to facilitate the rearward transport of cut rock fragment.

Abstract: An articulated debris barrier folds on itself to extend radially to span a surrounding annular gap when the tool associated with it is set. The debris barrier can be used with a packer or bridge plug. The set position of the packer or plug is locked and another lock holds the extended position of the debris barrier. The debris barrier lock can be a snap ring that extends into a groove brought into alignment with it during the setting. Alternatively the lock for the debris barrier can be a body lock ring. In either case, release and retrieval of the packer or plug involves undermining of the locking feature for the debris barrier so that the debris barrier can extend while retracting from the borehole wall so that the barrier and the associated packer or plug can be removed together.

Abstract: A horizontal well completion tubing string capable of achieving sublevel mining comprises a production casing. A horizontal section of the production casing is connected to two primary screen pipes. A pumping pipe is fixed in a vertical section of the production casing via a packer. A horizontal section of the pumping pipe extends freely in a horizontal well section constituted of the two primary screen pipes and the casing. A secondary screen pipe is disposed on the horizontal section of the pumping pipe. Meshes of the secondary screen pipe each comprises a reduced section, a straight section and an impact section, wherein an inner diameter of the reduced section is reduced outwardly along the radial direction of the secondary screen pipe, and an inner diameter of the impact section is reduced outwardly along the radial direction of the secondary screen pipe.

Abstract: Directional control of a rotary steerable drilling assembly can be facilitated by a flow control module for maintaining a geostationary position or orientation of components of the assembly. The drilling assembly can include a bit shaft and an offset mandrel for adjusting a longitudinal axis of the bit shaft. A drive mechanism can rotate the offset mandrel independently of the bit shaft to maintain the offset mandrel in a geostationary position or orientation relative to a formation of the earth and/or a wellbore. A flow control module controllably directs a fluid flow to the drive mechanism. The flow control module can include an inner body and an outer body, defining an annulus there between and one or more blades within the annulus, each of the blades being rotatable to provide a range of angles with respect to a longitudinal axis of the flow control module.

Abstract: Wear sensors are provided on a drill bit or other rotary cutting tool which is for operation in a subterranean borehole and has a plurality of separate cutters protruding from a support structure towards the material to be cut by the tool. The electrically operated sensing means are located at or coupled to a sensing point within a protrusion from the support structure. This sensing point is located within a protrusion such that attrition of at least one cutter to a partially worn state brings the protrusion into abrasive contact with the material being cut and attrition of the protrusion then exposes the sensing point to the material which is being cut by the tool and thereby brings about a detectable change, which may include damage to the sensor at the sensing point, indicative of wear. The tool includes means to communicate data from the sensing means to the surface.

Abstract: A system and method are usable as a telescoping, small-scale oil rig, having the ability to rotate tubulars in a wellbore, pull tubulars from the wellbore, and insert tubulars into the wellbore. The system comprises a telescopic derrick section, a casing jack platform, and a base section. The telescopic derrick comprises U-shaped substructure frames that can be nested together, and is connected to an adjacent substructure through hydraulic cylinders. When pressurized, the cylinders extend to separate each substructure and raise the telescopic derrick. The casing jack platform comprises a traveling casing jack and spider for holding, inserting and removing tubulars. The base section supports the telescopic derrick and comprises a rotary floor and another spider for holding, inserting and removing tubulars into and from the wellbore. The combination of the traveling spider and stationary spider can be used for inserting tubulars into the wellbore when the well is under pressure.

Abstract: A system includes a cage having a pipe rack configured to store a tubular in a vertical orientation, such that a longitudinal axis of the tubular is substantially perpendicular to a horizontal plane. The system also includes a first robotic pipe handler configured to transition the tubular from a horizontal orientation, in which the longitudinal axis of the tubular is substantially parallel to the horizontal plane, to the vertical orientation. The first robotic pipe handler transitions between a raised position and a lowered position about a first handler axis.

Abstract: A ball seat is expanded and held in place within a casing using an expander. The ball seat includes one or more gripping elements and one or more sealing elements. An apparatus for expandably installing a ball seat in a casing includes a ball seat having one or more gripping elements and one or more elastomeric sealing elements disposed on an exterior of an expandable sleeve portion of the ball seat that is expanded by pulling an expander into the bore of the expandable sleeve portion of the ball seat. A mechanical fuse is predisposed to fail at a level of force sufficient to move the expander to the installed position. Failure of the fuse and further movement of a pulling mandrel positions a channel on the mandrel into alignment with a distal end of the collet, enabling the collet to collapse and pass through the expander for removal.