Abstract: A reversible polycrystalline diamond compact (PDC) bit. The reversible PDC bit includes at least one blade, at least one front cutter disposed on a first side of the at least one blade, and at least one rear cutter disposed on a second side of the at least one blade, wherein the first side is opposite to the second side along a circumferential direction of the reversible PDC bit, wherein rotating the reversible PDC bit in a clockwise direction engages the at least one front cutter to cut into a subterranean formation, and wherein rotating the reversible PDC bit in a counter-clockwise direction engages the at least one rear cutter to cut into the subterranean formation.

Abstract: Systems and methods for instructing a device within a wellbore of a subterranean well includes a drill string with an actuator assembly extending into the subterranean. The actuator assembly has a first pipe member with a segment formed of a first material. A second pipe member is coaxially aligned with the first pipe member. A plurality of bearings are positioned between the first pipe member and the second pipe member. Each of the plurality of bearings includes a second material. The first material is reactive to the second material. Certain of the plurality of bearings are changeable bearings that include a dissolvable material. The actuator assembly is operable to instruct an operation of the device by generating an instruction signal by rotating the first pipe member relative to the second pipe member and interpreting a pattern of a reaction of the segment as a bearing rotates past the segment.

Abstract: A fluidic agitator includes a seamless insert body having an outer enclosure wall defining an enclosed cavity and a plurality of inner channel walls arranged to define an inlet chamber, a vortex chamber, and a feedback chamber within the enclosed cavity. The inlet chamber, the vortex chamber, and the feedback chamber create a hydraulic pulse in a fluid stream received in the enclosed cavity.

Abstract: An exemplary dissolvable assembly is provided. The dissolvable assembly includes a skeleton made from a first material, and a body made from a second material, wherein the first material and the second material dissolve at different rates.

Abstract: Methods of preventing or reducing cutter loss in a steel body PDC drilling tool may include applying a hardfacing layer on a surface of a PDC cutter pocket to form a covered PDC cutter pocket, the hardfacing layer comprising a metal binder and coated tungsten carbide particles; and bonding a PDC cutter into the covered PDC cutter pocket with a brazing material. Steel body PDC drilling tools may include a steel body, a PDC cutter, a PDC cutter pocket, and a hardfacing layer. Methods of preventing or reducing cutter loss in a steel body PDC drilling tool may include applying a hardfacing layer on a surface of a PDC cutter pocket of the steel body PDC drilling tool; applying a coated buffering layer on the hardfacing layer to form a coated PDC cutter pocket; and bonding the PDC cutter into the coated PDC cutter pocket with a brazing material.

Abstract: A spatial autocorrelation machine learning-based downscaling method of satellite precipitation data includes obtaining the TRMM precipitation data and the land surface parameters; preprocessing the land surface parameters to obtain DEM, day land surface temperature, night surface land temperature, day-and-night land surface temperature difference and NDVI with spatial resolutions of 1 km (0.621 miles) and 25 km (15.534 miles); performing a spatial autocorrelation analysis of the TRMM precipitation data to obtain an estimated spatial autocorrelation value of the precipitation data with a spatial resolution of 25 km (15.534 miles); downscaling the spatial resolution of the spatial autocorrelation value of the precipitation data from 25 km (15.534 miles) to 1 km (0.621 miles); establishing a nonlinear regression model; obtaining a precipitation downscaling data with a spatial resolution of 1 km (0.621 miles) based on the nonlinear regression model. A system and a terminal are also provided.

Abstract: A system and a method for forming a composite electrolyte structure are provided. An exemplary composite electrolyte structure includes, at least in part, polymer electrolyte preforms that are bonded into the composite electrolyte structure.

Abstract: The method for equal channel angular extrusion increases yield strength and ultimate tensile strength of a dissolvable aluminum alloy. A billet of a dissolvable aluminum alloy is wrapped with a sheet cover so as to form a wrapped billet. The wrapped billet is extruded through an equal channel angular extrusion die with an extrusion angle ranging 90-135 degrees so as to form an extruded billet. The step of extruding is at a temperature ranging 150-250 degrees C., an extrusion rate ranging 0.003-0.010 inches per second, and a back pressure ranging 200-10000 psi. The dissolvable aluminum alloy of the extruded billet has a yield strength and ultimate tensile strength 50% greater than the initial yield strength and initial ultimate tensile strength.

Abstract: A dissolvable aluminum alloy can be used for components of a downhole tool in hydraulic fracturing operations with low salinity fluid at low temperatures, including fresh water. The dissolvable aluminum alloy can be dissolved completely and controlled at a dissolving rate compatible with hydraulic fracturing operations. The alloy comprises aluminum having grain boundaries, magnesium at 8.25-12% by weight, gallium at 2.5-4% by weight, and indium at 2-4% by weight. At least portions of magnesium, gallium, and indium are located in the grain boundaries. There are secondary phase particles, including Al—Mg Beta, Mg2Si, Mg and Al—Ga Gamma phases at the grain boundaries.

Abstract: The tool assembly vibrates a casing string or drill string in a wellbore. The tool assembly includes a housing, an insert mounted in the housing as a fluidic agitator, a coating on the insert, and a cover fitted over the insert. The coating on the insert provides erosion resistance and a smooth surface compatible with high velocity fluid flow required to achieve the strength and frequency of desired high strength and low frequency pressure pulses.

Abstract: The tool assembly vibrates a casing string or drill string in a wellbore. The tool assembly includes a housing, an insert mounted in the housing as a fluidic agitator, a coating on the insert, and a cover fitted over the insert. The coating on the insert provides erosion resistance and a smooth surface compatible with high velocity fluid flow required to achieve the strength and frequency of desired high strength and low frequency pressure pulses.

Abstract: A dissolvable composite slip can include at least in part a dissolvable material. A dissolvable composite slip can include at least in part a non-dissolvable metallic material. The dissolvable material should be strong enough to support the non-dissolvable metallic material which serves as teeth to set into the casing during the function of the downhole tool. The dissolvable material can include but is not limited to a polymeric material or a metallic material. At least a part of the slip is able to be set as well as be dissolved.

Abstract: A support ring prevents an elastomer seal from extruding. The support ring is expanded and supports the expanded seal, preventing the elastomer seal failing due to extrusion.

Abstract: Surface fluorination treatment of elastomers provides an oil-resistant, mechanically robust, and cost-effective elastomer for use as seals, O-rings, and plugs for oilfield tools. The fluorination treatment of the elastomers provides resistance to oil swelling.

Abstract: A multi-sectional swellable packer for a wellbore has a mandrel and multiple packer elements mounted on the mandrel. The packer elements are formed of swellable materials that swell when contacted with a swelling fluid. In various embodiments, the outer diameter of the central element is larger than that of the end elements with or without gap between elements. In other embodiments, a multi-sectional swellable packer for a wellbore has multiple mandrels with multiple packer elements which are interconnected by flexible joints/connections. The outer diameter of the central element can be different from that of the end elements. The swellable rubber of the central element can be different from that of the end elements. The packer increases flexibility of operation and reduces the risk of run-in-hole.

Abstract: A dissolvable composite slip can include at least in part a dissolvable material. A dissolvable composite slip can include at least in part a non-dissolvable metallic material. The dissolvable material should be strong enough to support the non-dissolvable metallic material which serves as teeth to set into the casing during the function of the downhole tool. The dissolvable material can include but is not limited to a polymeric material or a metallic material. At least a part of the slip is able to be set as well as be dissolved.

Abstract: A virtual storage migration method is provided, including: starting a data migration process, and copying, from a source storage device to a destination storage device, a data block in a virtual disk to be migrated; when a VM front-end I/O read request is received, directly reading, corresponding data from the source storage device; when a VM front-end I/O write request is received, determining whether a migration data block that corresponds to the write request is being migrated, if yes, executing a write operation that corresponds to the write request after the migration of the migration data block is completed, if no, executing a write operation that corresponds to the write request; and after all the data blocks in the virtual disk to be migrated are copied to the destination storage device, stopping the data migration, and switching the virtual disk from the source storage device to the destination storage device.

Abstract: A faucet connecting structure contains a body including a chamber having a receiving trench, the receiving trench including an opening; an outlet pipe including a first end to input water and a second end to output water, the first end including a connector inserted into the receiving trench; an engaging member including a peripheral fringe, an inner surface, an outer surface, a first and a second segments, a slot, and the inner and the outer surfaces including at least one first deformable area and at least one second deformable area respectively to generate a radial-direction deformation when being forced in a radial direction so as to act against a radial-direction engaging force resulting from connecting the first engaging member and body together; a retaining means to retain the engaging member and the body together so that the outlet pipe is limited to move and rotate axially relative to the body.

Abstract: An insert for a drill bit and method of making an insert is disclosed herein. An insert has a grip region, a cutting extension having a cutting surface, and at least one implant embedded in the cutting extension, wherein the cutting extension comprises a first carbide material and the implant comprises a second carbide material, and wherein the second carbide material has a hardness that is greater than the first carbide material.

Abstract: A virtual storage migration method is provided, including: starting a data migration process, and copying, from a source storage device to a destination storage device, a data block in a virtual disk to be migrated; when a VM front-end I/O read request is received, directly reading, corresponding data from the source storage device; when a VM front-end I/O write request is received, determining whether a migration data block that corresponds to the write request is being migrated, if yes, executing a write operation that corresponds to the write request after the migration of the migration data block is completed, if no, executing a write operation that corresponds to the write request; and after all the data blocks in the virtual disk to be migrated are copied to the destination storage device, stopping the data migration, and switching the virtual disk from the source storage device to the destination storage device.