Abstract: A junk basket, comprising: mating parts, each mating part comprising an annulus covering portion, a cylindrical wall portion, a nipple seat portion and a nipple connector secured to the annulus covering portion, the cylindrical wall portion forming an interior wall to the annulus covering part; and the mating parts when mated forming an annulus covering surface, a nipple seat and a cylindrical wall forming an interior boundary to the annulus covering surface.

Abstract: A stabilizer for a pipe being removed from a well comprises a body formed of body segments where the body segments are separable to allow the body to open and be wrapped around the pipe. The stabilizer has a first annular seal formed by first seal elements within the body for receiving and stripping the pipe, and may have a second annular seal. The body segments may be hinged together about a hinge that may be configured to limit the movement of the body segments relative to each other. The hinge may comprise an interdigitated first and second row of fingers.

Abstract: A system and method for selective isolation of multiple wellbore intervals that can include an isolation mandrel interconnected in a tubing string, where the isolation mandrel includes an entry bore, a transition chamber, and an exit bore, the transition chamber being positioned between the entry and exit bores, and the transition chamber being radially enlarged relative to the entry and exit bores. An isolation device, with a predetermined length, is displaced through the tubing string to the isolation mandrel, where the length of the isolation device relative to a length of the isolation mandrel can determine if the isolation device passes through the isolation mandrel or lands in the isolation mandrel.

Abstract: A system and method for selectively locking open or close a gravel pack-circulating sleeve is disclosed. The sleeve is movably coupled to a first chamber containing a fluid. The first chamber is fluidly connected to a second chamber through a fluid flow controller. Shifting of the sleeve between open and closed positions is resisted by a the fluid flow controller. The resistance to fluid flow can reduce or eliminate inadvertent shifting of the sleeve due to short bumps and small loads upon the sleeve. To overcome the resistance to fluid flow and to shift the sleeve, a continuous load can be applied to the sleeve.

Abstract: A counterweighted well pumping unit comprises two or more reversible motors, each of which is directly and operatively connected to a rotatable drive component mounted on a support structure positioned over a wellhead. For each motor, an elongate, flexible drive element is trained over the associated rotatable drive component, with one end of the flexible drive element connected to a counterweight assembly and the other end connected to a pump rod string associated with the wellhead. Actuation of the motors rotates the rotatable drive components, thus causing the drive elements to move the pump rod string and the counterweight assembly in opposite vertical directions. The rotational direction of the drive motors is alternated so as to alternate the directions of vertical movement of the pump rod string and the counterweight. The counterweight assembly may be concentric with or offset from the wellhead.

Abstract: A modular carousel for holding a drill pipe segment in a drilling rig includes a central support having a top end and a bottom end, and a top plate removably coupled to the top end of the central support, the top plate including a top plate slot sized to receive an upper end portion of the drill pipe segment. A breaker plate has a breaker plate slot sized to receive an intermediate portion of the drill pipe segment, and a coupler assembly is configured to removably attach the breaker plate to the bottom end of the central support. A base plate is coupled to the breaker plate by an extension support, the base plate including a cup sized to receive a bottom end portion of the drill pipe segment.

Abstract: A drill bit for obtaining core sample fragments from a subterranean formation includes a bit body having a bit centerline and a bit face, a plurality of blades extending radially along the bit face, including a coring blade, a plurality of cutting elements on the blades, and a non-planar insert embedded in the bit body proximate the bit centerline. One of the cutting elements is a first cutting element on the coring blade at a first radial position from the bit centerline, and at least a portion of the coring blade is radially outward from a most radially interior cutting part of the first cutting element.

Abstract: A downhole plug for use in oil and gas well completions made of aluminum, dissolves in natural wellbore fluids, has a dissolvable seal made of aluminum 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, to provide an interventionless plug in a well.

Abstract: An exemplary embodiment of the amplification device generally includes amplification springs, complementary amplification spring seats for the respective ends of the amplification springs, and a corresponding hammer and anvil surface. A knocker bit comprises an impact surface on its upper end for interacting with the hammer surface of an impact tool, and a hammer surface on its lower end proximate its downward facing amplification spring seat. A bottom sub provides the corresponding anvil surface at its upper end proximate its upward facing amplification spring seat. The amplification device is used with an impact tool wherein the device amplifies the impact loads. The amplification device may be utilized with an oscillating device to provide rotational frequency in addition to the amplification device's axial frequency.

Abstract: Roll reduction system for rotary steerable system. A well drilling system includes a tubular housing that attaches inline in a drill string and a bit drive shaft supported to rotate in the housing by a roll reduction system. The roll reduction system includes a first gear carried by the housing to rotate relative to the housing and coupled to rotate with the bit drive shaft, and a second gear carried by the housing to rotate relative to the housing and coupled to the first gear to rotate in an opposite direction to the first gear.

Abstract: A rotary dill bit with a drill bit head and a connecting portion, wherein the rotary bit is positioned and oriented for shearing a surface of a subterranean formation. The drill bit head is comprised of one or more cutting discs, wherein each cutting disc is rotatably mounted to at least one shaft between a pair of support structures with each cutting disc having a cutting disc edge extending outwardly beyond the support structures. The cutting discs have cutting inserts in an overlapping pattern, wherein each cutting insert comprises a projection extending from the cutting disc edge and angled from the cutting disc edge at a side rake and a front rake angle.

Abstract: A barrier valve is operable to close using pressure on a ball landed on a seat associated with a sleeve whose movement opens a port to allow tubing pressure to move the ball to a closed position. Another sleeve is located on the opposite side of the closure ball in the barrier valve. Actuation of the second sleeve opens another passage to allow tubing pressure above ball to rotate the valve member back to an open position with the production tubing in the production packer so that production can begin. The balls disintegrate or disappear by virtue of exposure to well fluids and/or temperatures.

Abstract: A method of testing a barrier in a wellbore that includes isolating a volume in the wellbore between an isolation device connected with an apparatus and the barrier, and pressure testing the barrier using the apparatus to adjust the pressure in the volume.

Abstract: A cutter assembly, which may include a rotatable cutting element disposable within a pocket of an earth-boring tool, a sleeve configured to receive the rotatable cutting element, and at least one retention mechanism configured to secure the rotatable cutting element within the sleeve. The rotatable cutting element may include a substrate, a table, which may be comprised of a superhard, polycrystalline material disposed on a first end of the substrate, and a recess extending into a second, opposite end of the substrate. The sleeve may comprise at least one radial bearing surface, a backing support sized, shaped, and positioned to extend into the recess of the rotatable cutting element, and at least one axial thrust-bearing surface located on the backing support and positioned to contact the substrate within the recess.

Abstract: The disclosure relates to polycrystalline diamond compact (PDC) drill bits utilized for drilling wellbores.

Abstract: A ground working tool comprising a tubular base body with an inner receiving space for receiving a cylindrical core of solid ground material, connector mechanism for connecting the tubular base body with a rotary drive and locking mechanism for locking the core in the receiving space of the tubular base body. The locking mechanism involves at least one locking unit having a guide rail being disposed at an inner side of the tubular base body and arranged with a deviation angle relative to a tangential direction of the tubular base body and the locking unit further comprises at least one locking element, which is moveably mounted on the guide rail between a radially outer releasing position and a radially inner locking position, in which the core is clamped within the receiving space by means of the at least one locking element.

Abstract: An improved cementing tool is presented which allows for relatively easy removal and insertion of the tool through the use of non-threaded low-torque connections. The cementing tool uses a combination of threaded connections and non-threaded, low-torque connections configured to create a stack of components including plug launchers, ball launchers and plug launch indicator/counters. Use of non-threaded low-torque connections allows for breaking down the tool by hand, requiring no special torquing equipment.

Abstract: An annular space is made smaller with a hub on an inner member that supports a base ring from which extend bristles that are preferably wire whose proximity is close enough to retain debris from passing through while leaving sufficient fluid paths to allow fluid movement in opposed directions in response to relative axial movement of the components that define the annular space. In one application a running tool for a liner string that has a hanger/packer is contemplated. Movement of the running string after the hanger is set and the liner is released from the string keeps the barrier in the annular space while allowing movement of an initially inserted gel put there on assembly to migrate from the annular space through the debris barrier. The running tool can have a cap on the liner top that eventually is moved away as the running tool is picked up.

Abstract: A brake device for engaging an inner surface of a drill string within a borehole. The brake device has a driving member that defines a plurality of wedge surfaces, a brake retainer that receives at least a portion of the driving member, and a plurality of braking elements positioned in contact with at least a portion of the outer surface of the driving member. The brake retainer has a biasing member that is operatively coupled to the driving member. The biasing member of the brake retainer biases the driving member in a proximal direction relative to the longitudinal axis of the drill string to position the wedge surfaces in contact with corresponding braking elements, and the wedge surfaces drive the braking elements radially outwardly to engage the inner surface of the drill string. The brake device is not coupled to an inner tube assembly.

Abstract: A system and method of gathering sample cores from a subterranean formation with coring bit assemblies, where each of the coring bit assemblies retain a sample core within. Included is a container equipped with compartments for individual storage of each coring bit assembly and coring sample, so that each sample can be stored at the pressure at which it was obtained. The coring bit assemblies can be sequentially inserted into the container after being used to collect its sample core. In this instance, scaling devices, such as o-ring seals or a coining surface, are provided in the container. Bach coring bit assembly can also be disposed in a chamber, that is selectively scaled after the coring bit assembly gathers its coring sample.