105 results about "Bottom hole assembly" patented technology

Methods and systems for performing a formation pressure test include inserting a bottom hole assembly (“BHA”) into a wellbore. The BHA includes a drill bit and a formation testing tool with a battery and a fluid powered generator. An initial formation pressure test is performed while powering the formation testing tool with the fluid powered generator during the entire initial test. At least a portion of a formation pressure test is performed powering the formation testing tool with the battery during while the fluid powered generator is unavailable due to insufficient fluid circulation in the wellbore. The method also includes determining, using a processor, at least one characteristic of the formation based on results of the initial formation pressure test and the formation pressure test.

A bottom hole assembly includes a downhole conveyance that is extendable from a terranean surface, through a wellbore, and to a subterranean formation; and a perforating tool configured to couple to the downhole conveyance and create at least one pair of perforations. The at least one pair of perforations is arranged along a longitudinal direction of the wellbore such that a first perforation in the at least one pair of perforations is oriented at an azimuthal offset angle relative to a second perforation in the at least one pair of perforations.

A BHA (bottom hole assembly) hander comprises an arm, a support structure capable of securing to a tower base, a hydraulic cylinder connected pivotally between the arm and the support structure, actuating the hydraulic cylinder can drive the arm rotating relative to the support structure. When used to deploy a BHA, securing the support structure of the BHA hander to a tower base of the tower, loading the BHA onto the arm of the BHA hander and activating the hydraulic cylinder to raise the BHA hander to a vertical position.

In some implementations, a plurality of thermoelectric devices may be arranged to cool one or more components of a downhole drilling component during drilling operations. A current can be applied to one or more thermoelectric devices to generate a cooling effect. The thermoelectric devices can be located and arranged so that they cool some or all of a bottom hole assembly or components thereof, such as one or more sensors, batteries, processors, electrics, and the like. The thermoelectric devices also may be located and arranged to cool sensors, batteries, other downhole components, and / or drilling mud in a wellbore during drilling operations. A plurality of thermoelectric devices may be used to generate electric power downhole from a temperature difference. The electric power may be used to power sensors, processors, charge batteries, and be used by one or more downhole electric components, such as those in a bottom hold assembly. One or more thermal storage devices may be used with the thermoelectric devices to store thermal energy for use when needed. A control system may be used to control the activation and / or deactivation of one or more thermoelectric devices to provide cooling when desired.

Systems and methods provide a bottom hole assembly for a wellbore that includes a drill bit and multiple drilling tools. The multiple drilling tools include multiple sensors configured to capture a multiple instances of a common measurement type at multiple locations along a drill string. The multiple drilling tools also include processing circuitry configured to compare the multiple instances of the common measurement type to determine a difference among the multiple instances. The processing circuitry is also configured to determine that the difference is greater than a threshold corresponding to an inference of high frequency torsional oscillation. Furthermore, the processing circuitry is further configured to send an indication of an occurrence of high frequency torsional oscillation in the bottom hole assembly.

A bottom hole assembly includes a downhole conveyance that is extendable from a terranean surface, through a wellbore, and to a subterranean formation; and a perforating tool configured to couple to the downhole conveyance and create a perforation cluster in the subterranean formation. The perforation cluster includes perforations arranged along a longitudinal direction of the wellbore. The perforations includes one or more first perforations extending along a first azimuthal direction, one or more second perforations extending along a second azimuthal direction at a first offset angle with respective to the first azimuthal direction, and one or more third perforations extending along a third azimuthal direction at a second offset angle with respective to the first azimuthal direction. The one or more second perforations and the one or more third perforations are alternative with each other along the longitudinal direction of the wellbore.

A bottom hole assembly (BHA) deployable in a production tubing includes a foam assembly and a swab assembly. The foam assembly includes a check valve unit coupled to a chemical canister. The swab assembly is coupled to the foam assembly. The swab assembly includes a swab mandrel and a plurality of swab cups. A method for initiating natural flow in a well includes conveying a bottom hole assembly (BHA) on a slickline to a first depth into a production tubing, holding the BHA stationary in the static fluid, releasing a foaming chemical from the chemical canister to the production tubing via the check valve unit, activating the foaming chemical to form a foam, opening a well flowline, and swabbing at least a portion of the production tubing with the swabbing assembly of the BHA by at least partially removing the BHA from the production tubing.

A method for calibrating a steering model may comprise estimating an initial condition for one or more variables in the steering model and calibrating the steering model with a Markov Chain Monte Carlo Simulation (MCMC). A drilling system may comprise a bottom hole assembly, a drill string connected to the bottom hole assembly, and an information handling system connected to the bottom hole assembly. The information handling system may be configured to process one or more measurements from the bottom hole assembly, calibrate a steering model based at least in part on the one or more measurements, adjust a control logic based at least in part on the steering model, and adjust the bottom hole assembly based at least in part on the control logic.

A system includes a bottom hole assembly (BHA), including at least one valve including a bistable actuator coupled to a stem having a valve element, wherein the bistable actuator is configured to move the stem along an axial path of travel to position the valve element in an open position or a closed position relative to a valve seat. The at least one valve also includes a pressure-compensated seal disposed about the stem, wherein the pressure-compensated seal is disposed between an interior fluid chamber and a fluid flow path through the at least one valve.

Systems and methods disclosed herein may comprise a bottom hole assembly; and a cable disposed in the wellbore. In examples, the cable may comprise a superconducting material configured to provide at least power to the bottom hole assembly; one or more liquid supply channels configured to supply a fluid to reduce temperature of the superconducting material; and one or more liquid return channels. Further, cryogenic liquid may be pumped through the liquid supply channels.

Devices, systems, and methods for a bottom hole assembly to form perforations are provided. An abrasive jet perforating tool is configured to couple to a downhole conveyance that is extendable from a terranean surface, through a wellbore, and to a subterranean formation. The abrasive jet perforating tool is configured to inject abrasive particles along a radial direction to create perforations in the subterranean formation. A hydraulically actuated subassembly is attached to the abrasive jet perforating tool and configured to move the abrasive jet perforating tool towards or away from the subterranean formation along the radial direction.

A system comprising: a bottom hole assembly having a MWD tool comprising: a wireless telemetry module; sensor(s); a MWD processor; and medium storing instructions that when executed by the MWD processor cause the MWD processor to: obtain, from the sensor(s), a measurement value of a downhole parameter; determine an encoding format for the measurement value by comparing the measurement value to at least two ranges with each range associated with a separate encoding format having a compression level; apply the determined encoding format to the measurement value to generate a compressed measurement value; and transmit, utilizing the wireless telemetry module using wireless telemetry, the compressed measurement value; and a surface computer system configured to decode the compressed measurement value and utilize the decoded measurement value.

The application relates to a kind of calculation methods of the dynamic characteristics of drill string under simple harmonic impact, which comprises the following steps: one, drill pipe, collar, bottom hole assembly, drill bit are equivalent to two-degree-of-freedom axial and torsional coupling physical model of lumped mass;Two, based on the related theory of vibration mechanics, the mathematical model of two-degree-of-freedom axial and torsional coupling is described by Newton's theorem, and the mathematical model of drill string dynamics is established;Three, the mathematical model is modified by using state-dependent time delay method;Four, according to the dynamic characteristics of the drill string, the amplitude and angular frequency of the applied simple harmonic dynamic load are adjusted, and the dynamic characteristics of the drill string system are analyzed and determined.The application analyzes the influence of the amplitude and angular frequency of the applied simple harmonic impact on the dynamics of the drill string, which provides theoretical guidance for controlling the motion characteristics of the drill string, speeding up and reducing cost, and ensuring the safety of downhole.

A bottom hole assembly (BHA) deployable in a production tubing includes a foam assembly and a swab assembly. The foam assembly includes a check valve unit coupled to a chemical canister. The swab assembly is coupled to the foam assembly. The swab assembly includes a swab mandrel and a plurality of swab cups. A method for initiating natural flow in a well includes conveying a bottom hole assembly (BHA) on a slickline to a first depth into a production tubing, holding the BHA stationary in the static fluid, releasing a foaming chemical from the chemical canister to the production tubing via the check valve unit, activating the foaming chemical to form a foam, opening a well flowline, and swabbing at least a portion of the production tubing with the swabbing assembly of the BHA by at least partially removing the BHA from the production tubing.

Method for transmitting digital data between a bottom hole assembly and a surface assembly of a drilling rig, wherein at least one of the bottom hole assembly and the surface assembly comprises a transmitting transducer actuatable to generate acoustic waves propagating in a drilling fluid and the other of the bottom hole assembly and the surface assembly comprises a receiving transducer configured to detect acoustic waves, comprising the following steps : processing in sequence the data by means of convolutional coding, an interleaving operation and at least one spread spectrum modulation technique, obtaining a processed digital signal; - converting the processed digital signal into an analog signal; - actuating the transmitting transducer in such a way as to generate, in the drilling fluid, acoustic waves that correspond to the analogue signal; receiving the analog signal through the receiving transducer; converting the analog signal into a received digital signal; - processing in sequence the digital signal received by means of at least one demodulation technique, one "de- interleaving" operation and one convolutional decoding, obtaining the received data.

A method for downhole measurement operations. The method may include taking one or more measurements with a sensor disposed in a bottom hole assembly, converting the one or more measurements into one or more revolutions-per-minute (RPM) measurements, identifying one or more frequency components of the one or more RPM measurements using a Fast Fourier Transform, identifying one or more peaks of the one or more frequency components, and identifying torsional oscillation based at least in part on the one or more peaks. The method may be performed on a non-transitory computer-readable tangible medium comprising executable instructions that cause a computer device to take one or more signal measurements, identify one or more frequency components of the one or more signal measurements using a Fast Fourier Transform, and identify one or more peaks of the one or more frequency components.

The invention relates to the technical field of unconventional oil and gas resource development, in particular to a real-time control method for safe borehole drilling of a horizontal well, which comprises the following steps of: fitting stratum forced vectors of all drilled sections and actual track adjustment vectors of a bottom drilling tool combination to obtain a stratum-drilling tool coupling mapping function; establishing a system error vector for predicting the to-be-drilled section by taking the stratum forced vector of the to-be-drilled section and the actual trajectory adjustment vector of the bottom drilling tool combination of the drilled section as a reference and combining a stratum-drilling tool coupling mapping function; and actual trajectory control parameters of the section to be drilled are determined according to the prediction system error vector, so that the borehole trajectory meets the geological target spot requirement. According to the real-time control method for horizontal section track adjustment, accurate pre-judgment of track adjustment can be achieved, improvement of the precision of horizontal section track adjustment is facilitated, the mechanical drilling speed is increased, and the real-time control method is particularly suitable for well track adjustment in coal seam horizontal section drilling.

A bottom hole assembly includes a downhole conveyance that is extendable from a terranean surface, through a wellbore, and to a subterranean formation; and a perforating tool configured to couple to the downhole conveyance and create a perforation cluster in the subterranean formation. The perforation cluster includes perforations arranged along a longitudinal direction of the wellbore. The perforations includes one or more first perforations extending along a first azimuthal direction, one or more second perforations extending along a second azimuthal direction at a first offset angle with respective to the first azimuthal direction, and one or more third perforations extending along a third azimuthal direction at a second offset angle with respective to the first azimuthal direction. The one or more second perforations and the one or more third perforations are alternative with each other along the longitudinal direction of the wellbore.

This invention relates to the field of circulation bypass tools, specifically a downhole drilling circulation bypass tool and an unlimited circulation bypass method. The former includes a main body, an upper guide sleeve, a lower guide sleeve, a central tube, an indexing sleeve, an activation ball seat, and an isolation ball seat. The main body contains an indexing sleeve, with an upper guide sleeve and a lower guide sleeve located above and below it, respectively, to assist in the indexing sleeve's rotation. The upper and lower guide sleeves are installed at corresponding positions on the main body. A central tube is installed inside the indexing sleeve, with its lower end located below the lower guide sleeve. This invention features a reasonable and compact structure, is easy to use, and utilizes a combination of an upper guide sleeve, an indexing sleeve, and a lower guide sleeve to control the periodic alignment and misalignment of the circulation holes, enabling the tool to switch between different working states. The absence of a ball basket at the bottom shortens the effective length of the drill string, facilitating bottom hole assembly design, wellhead installation, and transportation.

A bottom hole assembly includes a downhole conveyance that is extendable from a terranean surface, through a wellbore, and to a subterranean formation; and a perforating tool configured to couple to the downhole conveyance and create at least one pair of perforations. The at least one pair of perforations is arranged along a longitudinal direction of the wellbore such that a first perforation in the at least one pair of perforations is oriented at an azimuthal offset angle relative to a second perforation in the at least one pair of perforations.

A bypass tool including a bypass tubing insertable through a tubing anchor. The bypass tool also includes a lower bypass nipple supported by a lower end of the tubing anchor and to permit gas to pass from outside of a bottom hole assembly (BHA) to between the bypass tubing and the tubing anchor and an upper bypass nipple supported by an upper end of the tubing anchor to permit the gas to pass from between the bypass tubing and the tubing anchor to back outside of the BHA. A method of recovering production fluids from a well using the bypass tool. The method includes positioning a bypass tool at a desired location in a well. The method also includes pumping a gas through the bypass tool.

Some implementations include a system comprising at least one coiled tubing extending from a surface of a wellbore to a bottomhole assembly (BHA); a power cable to be housed either inside or outside the at least one coiled tubing and to electrically couple a power supply at the surface of the wellbore with the BHA. The BHA comprises at least one capacitor to store electrical power received from the power supply via the power cable housed in the at least one coiled tubing; and at least one electrode electrically coupled to the at least one capacitor to receive the stored electrical power from the at least one capacitor and to periodically emit pulsed power discharges into a subsurface formation to drill the wellbore based on the stored electrical power received from the at least one capacitor.

An ultrasonic system for downhole cleaning of a wellbore includes: an ultrasonic generator that generates high-frequency electric power; a measurement device that monitors electrical parameters related to operation of the ultrasonic system; and an ultrasonic emitter including one or more transducers that break drill cuttings in the wellbore. The ultrasonic emitter is disposed on a Bottom Hole Assembly (BHA) and breaks the drill cuttings made by the BHA in drilling operations.

A method of the invention prepares a hydrocarbon-bearing formation for stimulation. A bottom hole assembly comprising a plug and a perforation tool connected to a wireline is lowered into a wellbore having a casing. An acidic composition is injected into the wellbore; wherein a spacer separates the acidic composition from said bottom hole assembly, but the acidic composition is in direct contact with both the wireline and casing. The spacer may be existing water in the wellbore or water injected into the wellbore. The plug is positioned downhole beyond a location where a first perforation area is to be made in the casing. The perforation tool is activated creating the first perforation area. The acid then contacts the first perforation area and cementitious debris generated from the casing being perforated. The perforation tool is next moved up-hole to a second location and the casing is again perforated to create a second perforation area. The acid also contacts the second perforated area and cementitious debris generated from the perforated casing. The perforation tool is lastly removed from the wellbore.

An automated system and process for vertically assembling and disassembling a wireline bottom hole assembly (BHA) comprises one or more robots, and a structure comprising a receiver assembly. The receiver assembly comprises a conduit adapted to permit respective bottom hole assembly sections to be moved between an interior and an exterior of the structure. The robots are structured to retrieve bottom hole assembly components from bins and assemble bottom hole assembly sections that make up a bottom hole assembly. The robots move each section to the receiver assembly to connect the section to a partial assemblage comprising a wireline and respective subassemblies. After use of the BHA, the robots disassemble sections of the BHA and move the components to used component bins and / or to a dispensing shoot leading to a waste container. The system has modules adapted to provide information regarding the status of components and the BHA.

A bottom hole assembly (BHA) comprising a deformation tool, wherein the BHA is adapted for performing a deformation and cementing operation in a wellbore in a single trip.

A method can include a computing device receiving a drill plan for the borehole. The drill plan can include survey information providing formation information for one or more sections of the borehole. The method can include accessing a plurality of capability data for one or more bottom hole assemblies that may include: a neutral capability score, a steering capacity score, and a sliding ratio score. The method can include determining an overall score for each of the one or more bottom hole assemblies based at least in part on the neutral capability score, the steering capacity score, and the sliding ratio score. The method can include determining, by the computing device, a select bottom hole assembly of the one or more bottom hole assemblies based at least in part on the overall score. The method may include displaying the overall score and an identification of the select bottom hole assembly.

A wireless short hop assembly includes a transmitter antenna and an integrated receiver / pulser module. A receiver antenna and a pulser assembly are consolidated into the receiver / pulser module. The transmitter antenna is configured to transmit a wireless signal to the receiver antenna. When the wireless short hop assembly is deployed on subterranean drilling bottom hole assembly (BHA) such that a shock reduction tool is interposed on the BHA between the transmitter antenna and the integrated receiver / pulser module, the integrated receiver / pulser module positions the receiver antenna closer to the shock reduction tool and the transmitter antenna than if the receiver antenna and the pulser assembly were discrete. The wireless signal as received by the receiver antenna is stronger and more stable than if the receiver antenna and the pulser assembly were discrete.

Methods and systems are provided for monitoring operational characteristics of a drilling system that includes a bottom hole assembly having a drill collar operably coupled to a drill bit. A device having an elongate beam and at least one pair of sensors is rigidly secured to a part of the bottom hole assembly to measure strain in the part of the bottom hole assembly. The measurement of strain can be used to derive a measurement of at least one operational parameter of the drilling system, such as dog leg severity of a wellbore, torque on bit, and / or weight on bit.

The application belongs to the technical field of drilling trajectory control, and specifically discloses a drilling trajectory azimuth control method with drilling pressure fluctuation suppression, which comprises the following steps: establishing a nonlinear delay differential equation describing the evolution relationship between the drilling trajectory azimuth and the bottom hole assembly azimuth; separating and modeling the drilling pressure change term in the equation as a drilling pressure uncertainty term to obtain a trajectory azimuth dynamic state equation containing the drilling pressure uncertainty term; based on the state equation, a double-loop control system containing an inner loop and an outer loop is constructed, the inner loop comprises a state observer and an angle estimator, and the outer loop comprises an inner model controller and a state feedback controller; a Lyapunov function is constructed based on the state space equation of the double-loop control system, the system robust stability condition is converted into a linear matrix inequality through stability analysis, and the gain matrix of the state observer and the state feedback controller is solved to obtain the gain matrix of the state observer and the state feedback controller. The application can effectively suppress the influence of drilling pressure fluctuation on drilling trajectory azimuth control.