Abstract: Detector device (10) mounts to a drilling rig (12) to sense sound or vibration signalled from downhole. The device (10) has a transmitter (10,20) to transmit data and/or an alert relating to sensed sound and/or vibration associated with deployment and/or positioning of a tool downhole. The device (10) recognises that one or more predetermined events or a pattern of events or one or more particular sound and/or vibration signatures occur(s). Downhole device (36) has a transmitter (38) transmitting a signal indicating a sensed pressure, position or motion change downhole. Communication between the downhole device and the device at the surface to determine depth or distance e.g. time of flight of a signal emitted by one device and the return signal from the other device or from the send and received times of the signal between the two devices based on their respective timers.

Abstract: A distributed control system for a well string includes a first control section configured to be positioned at a first location. The first control section includes a first control module configured to control a first device positioned at the first location, and the first control module includes a first electric actuator configured to control flow of a fluid to the first device based on a first control signal to control the first device. The distributed control system also includes a second control section configured to be positioned at a second location, remote from the first location. The second control section includes a second control module configured to control a second device positioned at the second location, and the second control module includes a second electric actuator configured to control flow of the fluid to the second device based on the second control signal to control the second device.

Abstract: Methods, systems, and storage media are presented for operating a drill string within a well. Exemplary implementations may: detect, using one or more sensors, data representing an analog control command sequence; analyze the analog control command sequence; determine that the control command sequence represents a command to change an operational mode of the drill string from a first operational mode to a second operational mode; and transmit a signal to an actuator of the drill string, the signal representing an electronic command to activate the actuator in such a way as to change the drill string from the first operational mode to the second operational mode. In some embodiments, the analog control sequence may comprise a predetermined sequence of rotational inputs, vibrational inputs, pressure inputs, or a combination thereof.

Abstract: A wellhead monitoring system includes a conversion assembly, the conversion assembly including an actuator element for modifying an operating mode of a valve from manual to remote. The system also includes one or more sensors, associated at least one of a fracturing tree or the conversion assembly, the one or more sensors obtaining wellhead operating conditions. The system further includes a control unit, adapted to receive information from the one or more sensors, the control unit presenting the information, on a display, and transmitting the information to a remote system for analysis.

Abstract: A system comprising a ground drilling device with a control device, the system including an input device functionally coupled to the control device for entering at least one parameter for operating the ground drilling device. The at least one parameter may include a parameter that causes the ground drilling device to start drilling. The input device may be configured as a remote control with a feedback device, which outputs a variable that a user can perceive i) tactilely, ii) visually, and/or iii) auditorily, and that depends on a) the operation of the ground drilling device, b) the operating state of the ground drilling device, and/or c) the signal of a detection device.

Abstract: A method of imaging a wellbore casing using an ultrasonic sensing system through the material of a drill string as the drill string is tripped out of the wellbore.

Abstract: A compact downhole tool, such as a frac plug, may include a single frustoconical member and a single set of slips. The slips may further include an internal button that engages with the frustoconical member. Various elements in the downhole tool may be dissolvable or degradable.

Abstract: A perforation gun having a modified pin end for positioning a blast shield between adjacent guns, the blast shield electrically joining movable contact pins and propagating firing signals between while protecting against blast forces from previous explosions. The perforation guns also having a wiring port in the charge carrier and alignment pin for opening and adding detonation circuitry at time of use, positioned within the charge carrier where it is protected from damages caused by rough handling, flooding, vibrations, and blast forces.

Abstract: A circulation sleeve including a housing, a mandrel disposed at least partially within the housing, the mandrel and the housing together configured to respond to pressure applied to the sleeve from radially outward of the housing by moving the housing to a position relative to the mandrel where a treatment port through a radial wall of the mandrel is exposed outside of the housing and to respond to fluid flow rate within the mandrel to move the housing to a position relative to the mandrel where the treatment port is disposed within the housing.

Abstract: A gun assembly for perforating a well, the gun assembly including a single carrier; a first gun cluster, the first gun cluster including first plural shaped charges; and a second gun cluster, the second gun cluster including second plural shaped charges. The first gun cluster and the second gun cluster are placed in the single carrier.

Abstract: Seals for pressure control fittings are disclosed, where such pressure control fittings are located at a wellhead, for example. Embodiments of cam lock seals, a spring-driven ball race seal and wedge seals are disclosed.

Abstract: Provided herein is a method for constructing a pumping-injection well of a groundwater reservoir in a dump of an open-pit mine. The pumping-injection well includes a bottom pipe, intermediate pipes, and a top pipe in sequence from bottom to top connected from bottom to top. The method includes: arranging a rubble barrier around the pumping-injection well, and installing the bottom pipe of the pumping-injection well at a designed position of the pumping-injection well as a center of circle; continuing to install an intermediate pipe on the bottom pipe, and pile up a rubble pile; continuing to stack multiple intermediate pipes, and starting the construction of the groundwater reservoir; discarding discarded materials from the open-pit mine to form a dump; continuing to stack intermediate pipes to build an inverted trapezoidal surface sump around the pumping-injection well; and installing the top pipe and a well cover to form a complete pumping-injection well.

Abstract: A self-positioning system for a perforating gun or gun string is provided. The self-positioning system includes a plurality of protrusions extending outwardly from the perforating gun or the gun string for providing a finite number of rotational positions and/or for providing a desired water clearance. The protrusions include one or more groupings of at least three protrusions, the protrusions being angularly offset from each other about the outer circumference of the perforating gun or gun string.

Abstract: A frac plug with lower slips and a lower cone. In embodiments, a lower cone ramp angle is greater than or equal to a cone bevel angle and a slip inner cut angle. This geometry enables the fins of the cone to not interact with the lower slips, which may not break the lower slips as the lower slips move over the cone. Instead, the lower slips may break due to stresses caused by the tendency of the lower slips to expand as they lower slips interact with the ramp of the lower cone.

Abstract: A perforation gun that includes a monolithic bulkhead electrical contact that includes no resilient members but that is resiliently coupled to two perforating guns. The bulkhead electrical contact is configured to transmit a signal across a bulkhead from one gun to another gun.

Abstract: A system used to dislodge and, if necessary, sever a tubular string that is stuck within a cased wellbore. The system utilizes a jar, a plurality of plugs, and a tubular severance device. Components of the system are carried to their respective desired downhole positions by downward fluid flow within the wellbore. The jar is configured to jar the string in an effort to dislodge the string from its stuck point. The plugs are configured to fill open perforations formed in the casing in order to direct the fluid toward the stuck point and away from the perforations. If the string cannot be freed by the jar, the tubular severance device is deployed within the string above the stuck point. Detonation of the device severs the string above the stuck point.

Abstract: A drill bit includes a bit body defining a bit rotational axis and a blade attached to the bit body. The apparatus also includes a cutter comprising a cutting arc on a cutting surface of the cutter, wherein the cutter comprises at least one relief comprising a straight edge and a curved edge having an end that interrupts the cutting arc.

Abstract: A perforating apparatus and method are disclosed wherein voids and inclusions may be configured to promote fragmentation of the charge case into pieces of less than a target size. In one example, the charge case of a shaped charge has a plurality of inclusions of a material interspersed with a plurality of voids of the material to promote fragmentation of the charge case. The inclusions and voids may be disposed along the periphery, such as along a mounting flange. In some examples, the voids may be holes of any of a variety of shapes, geometries, and positioning formed in the parent material of the charge case. In other examples, pieces of hardened material may be embedded in the parent material of the charge case to displace the parent material as well as to initiate probable locations of fragmentation.

Abstract: Methods for optimization of liquid oil production by huff-n-puff in shale reservoirs to achieve an improved (and optimal) oil recovery factor. The process determines and utilizes the optimum huff and puff times, number of cycles and soaking time under practical operation and reservoir conditions. The huff time in the process is a period so long that the pressure near the wellbore reaches the set maximum injection pressure during the huff period. The puff time in the process is the time required for the pressure near the wellbore to reach the set minimum production pressure during the puff period. Soaking is typically not necessary during the huff-n-puff gas injection in shale oil reservoirs. The number of huff-n-puff cycles is determinable by the time in which the economic rate cut-off is reached.

Abstract: A system comprising a ground drilling device with a control device, the system including an input device functionally coupled to the control device for entering at least one parameter for operating the ground drilling device. The at least one parameter may include a parameter that causes the ground drilling device to start drilling. The input device may be configured as a remote control with a feedback device, which outputs a variable that a user can perceive i) tactilely, ii) visually, and/or iii) auditorily, and that depends on a) the operation of the ground drilling device, b) the operating state of the ground drilling device, and/or c) the signal of a detection device.