Abstract: A method includes using a computing system in generating a land surface or sea floor digital image from post-stack seismic data and determining a clathrate stability zone from the land surface or sea floor digital image. The method also includes generating a laterally extensive subsurface digital image from the seismic data that is within or below the clathrate stability zone and filtering the laterally extensive subsurface digital image to generate a pull-up digital image. The method also includes generating a coarse-grained sediment digital image from the seismic data within the clathrate stability zone. The method also includes spatially superimposing the coarse-grained sediment digital image and the pull-up digital image to generate a combined digital image. The method also includes determining an overlap region from the combined digital image. The overlap region is indicative of a clathrate deposit.

Abstract: Systems and methods of down-hole communication facilitate communication across a mud motor. The systems and methods can employ a hysteresis brake that selectively slows a turbine shaft to thereby produce local pressure pules in a drilling fluid in a predetermined pattern. The hysteresis brake can be operated by providing a relatively small control current to produce a relatively large counter torque, which can be transmitted the turbine shaft. The turbine and the hysteresis brake may be provided below a mud motor, and the local pressure pulses may be transmitted to a receiver disposed above the mud motor while the mud motor is operating. The hysteresis brake can be employed when other communication systems fail, and thus can provide a back-up system to permit a drilling operation to be continued.

Abstract: Systems and methods for reducing or removing condensate blockage in a natural gas wellbore and a near-wellbore formation. Microwaves are used to heat a ceramic-containing material within a near-wellbore formation. Heat is transferred from the ceramic-containing material to the near-wellbore formation. Any gas condensate reservoirs in the near well-bore formation are heated, and condensed liquids accumulated around the wellbore are re-evaporated.

Abstract: A centralizer, a device and a system. An example centralizer includes: a longitudinal axis, and first and second opposing end collars positioned around the axis of the centralizer; and a plurality of spring bows extending from the first end collar via a generally convex curved portion to the second end collar. A radial distance from an outwardly facing portion of the first end collar to the axis is: greater than a radial distance from a first outwardly facing portion of a spring bow of the plurality of spring bows, at a longitudinal axial position where the spring bow extends from the first end collar, to the axis; and less than a radial distance from a second outwardly facing portion of the spring bow, at a longitudinal axial position between the first end collar and the second end collar that is farthest from the axis, to the axis.

Abstract: A gripper for gripping a pipe (P) has gripping bodies holding devices, and dies, the dies being fastened to respective holding devices that are fastened to respective gripping bodies with respective connection arrangements. The connection arrangements can be maneuvered to release the respective holding device for the holding device to assume a service position held by the respective gripping body. A die locking device of a holding device is adapted to be kept, by contact with the respective gripping body, in a locking position when holding device is in the operation position. The locking device can move to an open position when the holding device is moved away from the operation position. The die and a seat in the holding device have a notch and a protrusion, arranged so that, as the pipe contacting element is inserted into the seat in an insertion direction, the protrusion enters, in parallel with the insertion direction, into the notch.

Abstract: A production assembly for controlling production from a well includes a wellhead and a tubing hanger assembly. The wellhead includes a bore formed through the wellhead with a first groove and a second groove each extending into the wellhead and axially spaced apart from each other. The tubing hanger assembly is installable in the wellhead and includes a load segment expandable into engagement with the first groove to support the tubing hanger assembly within the wellhead and a lock ring expandable into engagement with the second groove to secure the tubing hanger assembly within the wellhead.

Abstract: Fluid densities can be monitored in real-time in a wellbore, such as during downhole stimulation operations, using an acoustic pressure-sensing system. The measured acoustic signal can be used to determine pressure fluctuations of a fluid in non-laminar flow. An estimated density of the fluid can be calculated based on the pressure fluctuations of the fluid and a known flow rate of the fluid. The flow rate of the fluid can be known, such as when being held constant by surface equipment or when measured at the surface.

Abstract: Optimizing deposit production in a well includes localizing the low resistivity fluid deposits in a geological formation. Once the deposits are mapped, production of the fluid deposit from the geological formation is optimized based on the localizing. The optimization may include adjustment of at least one of a drilling parameter or a production parameter.

Abstract: A self-adjusting spinner is provided that is capable of accommodating various pipe sizes without requiring the need for an operator to climb up the support mechanism and manually change the position of the drive assembly. The self-adjusting spinner includes a case having two pivotally connected members: a stationary case member and a moving case member. Upper and lower plates having gear racks are mounted on the stationary case member for moving a drive assembly horizontally across the case. The drive assembly includes a motor that drives gear sprocket through a drive shaft. The drive sprocket then drives a chain that rotates a drill pipe in an operative position relative to the case. The spinner also includes an adjusting assembly mounted on the case that moves the drive assembly along the gear rack upon the actuation of an adjustment sequence. When the adjustment sequence is initiated, the effective length of the chain is adjusted to accommodate drill pipes of varying diameters.

Abstract: A bottomhole assembly for deployment within a wellbore is disclosed. The wellbore string includes a port and a flow control member, wherein the latter is displaceable to open and close the port. The flow control member comprises a first mandrel; a second mandrel including a locator for disposition within a locate profile of the wellbore string to resist displacement of the second mandrel, relative to the locate profile, and locating the bottomhole assembly within the wellbore string. A shifting tool is disclosed, the shifting tool including two gripper surfaces; and two shifting tool actuators, translatable with the first mandrel. The shifting tool actuators displace the shifting tool by displacing the first mandrel downhole or uphole relative to the second mandrel; and the second mandrel includes a retainer for limiting displacement of the shifting tool, relative to second mandrel, in both of downhole and uphole directions.

Abstract: Systems and methods for artificial lift via a downhole piezoelectric pump including methods of removing a wellbore liquid from a wellbore that extends within a subterranean formation and/or methods of locating the downhole piezoelectric pump within the wellbore. The systems include hydrocarbon wells that include the wellbore, a casing, the downhole piezoelectric pump, and a liquid discharge conduit and the systems may be utilized with and/or configured to perform the methods.

Abstract: An earth-boring drilling tool comprises a cutting element. The cutting element comprises a substrate, a diamond table, and at least one sensing element formed from a doped diamond material disposed at least partially within the diamond table. A method for determining an at-bit measurement for an earth-boring drill bit comprises receiving an electrical signal generated within a doped diamond material disposed within a diamond table of a cutting element of the earth-boring drill bit, and correlating the electrical signal with at least one parameter during a drilling operation.

Abstract: Disclosed embodiments may relate to devices or tools for diverting flow within a wellbore. For example, disclosed tool embodiments may allow for more efficiently cutting and pulling of casing from a wellbore during well abandonment operations, since diverting fluid flow as disclosed may allow for a single tool string trip to allow the flow patterns for both cutting and cleanup.

Abstract: A tubing anchoring tool connectable to a tubing string and positionable within a well conduit is provided, for preventing movement of a tubing string. The tool comprises one or more axial grooves formed along the length of an outer surface thereof, for accommodating cables placed therein.

Abstract: A downhole vibratory tool for placement in drillstrings is disclosed. The downhole vibratory tool creates vibrations in the drillstring while drilling. A rotary drive rotates in response to fluid flow through it, rotating a rotor having a lower end engaging an upper end of a mandrel. The mandrel is held in a main body such that it is rotationally locked with respect to the main body, but can move longitudinally within a restricted range. The lower end of the rotor and the upper end of the mandrel have interfacing surfaces. Rotation of the rotor and interaction of the interfacing surfaces creates a back-and-forth movement of the mandrel with respect to the rest of the tool, creating the desired vibratory motion.

Abstract: A drilling device is brought into an idling state by maintaining the engine speed at a first speed while waiting for a drilling operation. The engine speed is increased to a second speed that is higher than the first speed when any one of a rotation operation, a feeding operation, a rod exchange operation, or a boom operation is performed for a rock drill. The engine speed is increased to a third speed that is higher than the second speed when a striking operation or a flushing operation is performed, and the engine speed is decreased from the third speed to the first speed after the striking operation and the flushing operation finish. For example, the first speed is a low speed, the second speed is a medium speed, and the third speed is a high speed.

Abstract: A digging bit includes a reaming portion whose diameter is larger than a rear end portion of a bit body, and which is formed in a front end portion of the bit body rotated around an axis, a digging tip which is arranged in a front end portion of the reaming portion, a debris groove which extends in a direction of an axis, and which is formed in an outer peripheral portion of the reaming portion, and a communication groove which communicates with the debris groove, and which is formed from the outer peripheral portion to a rear end portion of the reaming portion.

Abstract: A method and system for a hole opener are provided. The hole opener includes a shaft including a plurality of axial slots formed in an outer periphery and spaced circumferentially about the shaft, a plate coupled to the outer periphery between each pair of slots, the plate including fastening wings that extend radially outwardly from each circumferential end of the plate, and a blade extending radially outwardly from a respective one of the plurality of axial slots between a fastening wing of each of adjacent plates, the blade coupled to each fastening wing.

Abstract: A method of formation testing and a formation testing instrument are provided. The formation testing instrument includes a first pump, a dual packer module, a reverse injection module and a second pump. The dual packer module is provided with a support arm at one side thereof capable of setting after deployed; and the dual packer module is provided with first and second probes at the other side. The first probe is located above the second probe and the first and second probes can establish a channel with the formation. The second pump injects the acidizing liquid in the reverse injection module into the fluid region in the formation by the second probe; and the first pump sucks the fluid in the formation by the first probe.

Abstract: A system for selectively treating zones in a cased well-bore, including a downhole tool, having a body, an inner bore, and an outer surface. The tool body has at least one treatment port disposed on the outer surface and a sliding sleeve disposed within the inner bore for selectively isolating the inner bore from the outer surface. The sliding sleeve can be positioned in a closed position or open position with respect to the treatment port. A collet disposed around an outer surface of the sliding sleeve is for maintaining the sliding sleeve in an open position. At least one finger on the collet engages the inner surface of the bore for maintaining the sleeve in an open position. The sliding sleeve also has a means for maintaining the inner sliding sleeve in a closed position.