Abstract: A composition contains a polymer component comprising a crosslinked product of a polyarylene, a crosslinked product of a substituted polyphenylene, a crosslinked product of a polyphenylene sulfide and a polyphenylsulfone, or a combination comprising at least one of the foregoing; and a mesoporous silicate having an average pore size of about 5 nanometers to about 50 nanometers. The composition has high-temperature elastomeric properties and excellent mechanical strength. The compositions are useful in oil and gas downhole applications. Methods for the manufacture of the composition and articles comprising the composition are also disclosed.

Abstract: A water-insoluble manganese dioxide may be contacted with a solution having an effective amount of citric acid to form at least a portion of water-soluble manganese salt. The solution may have an initial pH of less than about 4. In a non-limiting embodiment, the solution may be fed into at least one equipment where the equipment has water-insoluble manganese dioxide therein.

Abstract: Methods of forming polycrystalline diamond compacts include employing field assisted sintering techniques with high temperature and high pressure sintering techniques. For example, a particle mixture that includes diamond particles may be sintered by subjecting the particle mixture to a high temperature and high pressure sintering cycle, and pulsing direct electrical current through the particle mixture during at least a portion of the high temperature and high pressure sintering cycle. The polycrystalline diamond compacts may be used to form cutting elements for earth-boring tools. Sintering systems are configured to perform such sintering processes.

Abstract: Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of an internal breaker composition that contains at least one mineral oil, at least one polyalphaolefin oil, at least one saturated fatty acid and/or at least one unsaturated fatty acid. The internal breaker may initially be dispersed oil droplets in an internal, discontinuous phase of the fluid. In one non-limiting embodiment, the internal breaker, e.g. mineral oil, is added to the fluid after it has been substantially gelled. An oil-soluble surfactant is present to enhance or accelerate the reduction of viscosity of the gelled aqueous fluid.

Abstract: Disclosed is a method for producing a crystal sensor. The method includes selecting a crystal configured to sense a property of interest. The method further includes implanting ions in the crystal using ion-implantation to produce a conductive region within the crystal where the conductive region is capable of providing a signal to sense the property of interest. Also disclosed is a method and apparatus for estimating a property of interest using the crystal sensor in a borehole penetrating the earth.

Abstract: Downhole cutting tools such as blade mills comprise a body having an upper end for connection with a rotating component of a drill string and a guide member disposed at lower end. The guide member can comprise a shape that is reciprocal to an engagement member disposed on an object within the well that is to be cut by the cutting mill. In certain embodiments, the guide member comprises a portion that is spherically shaped or an apex formed by two angled cutting elements. The cutting tools can also include one or more blades having cutting elements disposed thereon in a stepped arrangement. In one such embodiment, the cutting elements are disposed to cover one or more steps profiled on a lower end of the blade to lessen wear of the blade caused by the cutting of the object by the blade.

Abstract: A visualization system for visualizing data obtained in a borehole includes a processor configured to process the data based on user input and instructions and provide output for display on a display device. The system may also include a computer-readable medium configured to store the instructions, the instructions including commands to output values of two or more types of parameters at two or more depth values. The instructions may include commands to provide a perspective top-down or bottom-up fly-through display of the borehole including a zoomed-in image of values closest to a user. The processor may also output a display of a photographic image at each of the two or more depth values based on a correspondence between the values of the two or more types of parameters and the plurality of parameters associated with the photographic image.

Abstract: An actuation assembly including a sleeve member having a radially outwardly extending projection and a piston having an axis, the piston operatively coupled to the projection of the sleeve member and arranged to exert an actuation force on the projection of the sleeve member for actuating the sleeve member, the actuation force positioned about radially aligned with the axis or radially outwardly from the axis.

Abstract: In an embodiment is a seal including an elastomer; and boron nitride nanoparticles disposed in the elastomer, wherein the seal is thermally conductive and electrically insulating. In another embodiment, is a method of making a seal, the method includes compounding an elastomer with boron nitride nanoparticles to provide a composition; and molding the composition into a shape.

Abstract: An apparatus to be conveyed into a wellbore. The apparatus includes a housing configured to be conveyed downhole and a drive member located in the housing. The apparatus further includes a drive unit configured to actuate movement of the drive member by selectively coupling to the drive member, wherein the coupling of the device to the drive member is controlled by applying an energy to a selected material in the device.

Abstract: In some embodiments, apparatus useful for providing tubing into an underwater well includes at least one surface injector and at least one underwater injector. The surface injector is adapted and arranged to control the movement of the tubing into and out of the underground well below the sea floor during normal operations. At least one surface injector and/or underwater injector is arranged and adapted to maintain the tubing in substantial tension between the surface and underwater injectors.

Abstract: In one aspect an apparatus for determining a distance between a first borehole and a second borehole during drilling of the second borehole is disclosed that in one embodiment includes a magnet on a drilling tool that rotates in the second borehole to induce a primary magnetic field in a magnetic object in the first borehole, a substantially stationary sensor on the drilling tool that detects a secondary magnetic field from the magnetic object responsive to the induced primary magnetic field, and a controller that determines the distance between the first borehole and the second borehole from the detected magnetic field.

Abstract: The extrusion barrier for a sealing element for a packer or bridge plug is energized when set to store a retractive force that can be deployed when the packer or plug is released. The structure is a coiled spring that has gaps in the run in position and has a relaxed diameter smaller than the borehole or surrounding tubular dimension. When the packer is set a cone acts in conjunction with the spring to compress the coils together into contact while increasing the diameter to bridge an annular gap to act as an extrusion barrier. In the set position there is a restorative potential energy force that when the spring is allowed to relax retracts the shape back to the run in shape for removal of the packer or plug. Some of the trailing end coils are of a smaller diameter so that the structure can be clamped there for forcible axial movements in opposed directions.

Abstract: A drilling system, method and drilling apparatus for determining a parameter of a formation at a downhole location is disclosed. A member having a longitudinal axis is disposed in a borehole at the downhole location. A first magnetometer and a second magnetometer are disposed at an axial location of the member as separate azimuthal locations around the member and oriented tangential to a circumference of circle in a plane transverse to a longitudinal axis of the member. Magnetic fields resulting from a current flowing longitudinally through the member due to a spontaneous potential in the formation are measured to determine the spontaneous potential. The parameter of the formation is determined from the determined spontaneous potential.

Abstract: An embodiment of a method of estimating a property of an earth formation includes: disposing an acoustic tool in a borehole in an earth formation, the acoustic tool including an acoustic source and an acoustic receiver, the borehole having an axial direction; transmitting an acoustic signal into the borehole by the acoustic source, the acoustic signal having a selected frequency and transmitted at a propagation angle relative to the axial direction, the propagation angle selected to excite a desired guided flexural wave mode that propagates along a surface of the borehole; detecting an received acoustic signal by the acoustic receiver; calculating, by a processor, an incident angle of the received acoustic signal, the incident angle relative to the axial direction; measuring a shift of the propagation angle based on the incident angle; and estimating a property of the formation based on the shift of the propagation angle.

Abstract: An acoustic energy source that amplifies the stroke of electrically reactive elements having a body with an elastomer filled first cavity, a highly incompressible fluid filling a second cavity, and bores intersecting the second cavity that extend radially outward from second cavity. Quill assemblies in the bores each include an electrically reactive element and a tip projecting radially into the second cavity. A dynamic yoke having a lower portion projecting into the second cavity, and a pressure disk projects into the first cavity. A diaphragm on the body and on a side of the dynamic yoke opposite its lower portion. A fluid forms a film between the dynamic yoke, static yoke and quill tips. Applying alternating electricity reciprocates the tips into and out of the second cavity; reciprocates the dynamic yoke and diaphragm to generate the acoustic energy.

Abstract: A method of forming a tubular by additive manufacturing, where the method includes forming passages in a sidewall of the tubular and conductive elements in the passages as the tubular is being formed. Additional tubulars can be formed, so that when the tubulars are connected together the conductive elements in each tubular are in signal communication with one another. Adding threads to each tubular enables the tubulars to be coupled together to form a string. Conductive rings simultaneously formed in the ends of the tubulars provides contact means between adjacent tubulars in the string.

Abstract: The disclosure provides an apparatus for use in a wellbore that includes a first device that provides a first pressure differential based on a first constituent of a fluid and a second pressure differential based on a second constituent of the fluid and a second device that utilizes the first and second pressure differentials to operate a third device that performs an operation in the wellbore.

Abstract: An embodiment of an acoustic transducer assembly includes: a piezoelectric active element configured to emit acoustic signals, the active element having an emitting surface and a back surface located opposite the emitting surface, at least a portion of the back surface having a shape that forms a curve, the shape configured to cause the active element to have a variable thickness between the emitting surface and the back surface; and a backing material disposed in contact with the backing surface and configured to absorb the acoustic signals, the backing material shaped to conform to the back surface.

Abstract: An apparatus for protecting a module used in a borehole may include a plurality of shock protection elements associated with the module. The plurality of shock protection elements cooperatively has a macroscopic non-linear spring response to an applied shock event. The plurality of shock protection elements may include at least an enclosure and a dampener connecting the module with the enclosure. A related method for protecting a module used in a borehole may include enclosing the module within the plurality of shock protection elements; disposing the module in the borehole; and subjecting the module to a shock event. The plurality of shock protection elements cooperatively has a macroscopic non-linear spring response to the shock event.