52 results about "Bottom hole assembly" patented technology

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.

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.

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.

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 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.

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.

An accurate and elegant model is provided to characterize HFTO. For Type 1 HFTO, the model can predict frequency of the HFTO based on the distance between a reference location on the bottomhole assembly (e g., the end of the drill bit) and a point 40% up the motor. In short BHA strings there is the fundamental frequency while in longer BHA the first harmonic is used. For Type 2 HFTO, the model can predict frequency of the HFTO based on distance between a reference location on the bottomhole assembly (e.g., the end of the drill bit) and the first slick contact point, which is optionally in the middle of a long flex joint.

Embodiments presented provide for stress testing of downhole wireline formation testing equipment. Certain embodiments provide for stress testing of geological stratum which exhibit high permeability. A method to perform a stress test is disclosed. The method may comprise conveying a bottom hole assembly on a drill pipe to a testing location and setting at least two packers at the testing location. The method may comprise performing an injection of a fluid obtained from the drill pipe into the testing location and stopping the injection of the fluid from the drill pipe. The method may comprise performing at least one breakdown cycle injection with the fluid from the drill pipe and determining when the at least one breakdown cycle injection with fluid results in an open reservoir. The method may comprise performing an injection followed by falloff cycles using surface based pumps and deflating the at least two packers.

Apparatus including a bottom hole assembly (BHA) with a drill bit 108, and a downhole anchor 113 having a gripping element for engaging the borehole to control relative movement and load transfer bet

The invention belongs to the field of petroleum and natural gas development, and particularly relates to a fatigue life prediction method based on drill string dynamic stress, and the method comprises the following steps: inputting basic parameters: the basic parameters comprise a well track, a bottom drilling tool combination, a drill string structure and drilling parameters; according to a Lagrange equation, a drill string system dynamic model is established; node velocity, displacement and acceleration are obtained through a drill string system dynamics model, and drill string dynamic equivalent stress is calculated according to the node velocity, displacement and acceleration; counting a stress amplitude and a stress mean value by adopting a rain flow counting method; correcting the stress amplitude and the stress mean value by adopting a goodman formula; substituting into an S-N curve and calculating to obtain the fatigue life. According to the method, the fatigue life of the whole-well drill string can be analyzed, the fatigue service life of the whole-well drill string under the working condition is predicted through data analysis and processing, the presented result is the specific service time of the drill string, and the method has a very strong guiding effect on field engineering practice.

A method for drilling with a drill bit includes communicating a fluid from a bottom hole assembly to a center of the bit; directing the fluid through at least one peripheral port or nozzle whose axis does not intersect with a surface of a bore of the drill bit; distributing the fluid through ports or nozzles coupled to a plurality of blades and junk slot areas distributed circumferentially around a center axis; and directing fluid with a plurality of ports or nozzles to the cutting elements for cleaning and cooling.

A jarring tool used to dislodge a stuck tubular string or bottom hole assembly within an underground wellbore. A funnel element is placed underground either within, or as part of, a tubular string. A deformable ball may be seated within the funnel element to block fluid from passing within the tubular string. Hydraulic pressure may build within the tubular string until it exceeds the pressure the ball can withstand. This will cause the ball to deform and be expelled through the funnel element. With no ball to block its flow, fluid will be rapidly released through the funnel element. The rapid release of fluid will cause a powerful jarring or jolting to the tubular string or bottom hole assembly. Deformed balls may be captured in a cartridge chamber installed within the drill string and sized to create turbulent fluid flow within the drill string.

The present application relates to a kind of downhole while drilling instrument circuit cooling system and downhole bottom hole assembly, it is related to oilfield drilling and production technical field, for solving the problem of downhole while drilling instrument circuit board due to overheating damage or service life shortening.Downhole while drilling instrument circuit cooling system includes: electronic warehouse framework, which is sealed with downhole while drilling instrument connection, electronic warehouse framework is used to place the circuit board of downhole while drilling instrument;Circuit cooling assembly is sealed in electronic warehouse framework;Wherein, circuit cooling assembly is used to reduce the temperature of circuit board, to ensure that downhole while drilling instrument works at preset temperature.In the present application, electronic warehouse framework is separately arranged, the circuit board of downhole while drilling instrument, i.e. main heat source, is placed in electronic warehouse framework.And, a set of circuit cooling assembly is separately arranged, and the circuit board is cooled by using circuit cooling assembly.This ensures that downhole while drilling instrument works below preset temperature.

A system and method for drilling comprising receiving, during drilling of a wellbore, drilling plan information and information from a bottom hole assembly (BHA) located in the wellbore; determining a target toolface for drilling a planned path according to the drilling plan information; modeling one or more forces on the BHA based at least in part on the information from the BHA and the drilling plan information; determining, based at least in part on the modeled one or more forces, a predicted delivered toolface when drilling the planned path according to the drilling plan information using the target toolface; responsive to a difference between the predicted delivered toolface and the target toolface, determining an adjusted target toolface accounting for the one or more forces; and sending one or more control signals to orient the BHA to the adjusted target toolface and drilling according to the adjusted target toolface.

Examples described herein provide a method for drilling a wellbore by a wellbore operation system into a subsurface of the earth. The wellbore operation system includes a bottom hole assembly. The met

In the context of downhole tools, fixed volume power charge initiator assemblies and bottom hole assemblies utilizing fixed volume power charge initiator assembly are disclosed. The fixed volume power charge initiator assembly has a pressure bulkhead coupled to a cartridge. The cartridge includes an igniter disposed within an interior cavity of the cartridge. When used in a bottom hole assembly the fixed volume power charge initiator assembly is located in a setting tool adjacent to a power charge located within a combustion chamber of the setting tool. The combustion chamber and the cartridge together define a fixed total combustion volume. In some instances, the fixed volume power charge initiator assembly includes a power charge detector switch. Other assemblies are discussed.

A pulsation dampening device includes a body having an upper connection end and a lower connection end, each connection end adapted to connect the body to connectors for a drill string pipe segment that are part of one of a top drive, a lower Kelly valve, a saver sub, drill string sub, a drill string pipe and a bottom hole assembly. Flow restriction is provided within an internal flow path extending axially through the body and is configured to reduce pumped fluid pressure pulses originating from an agitator within downhole tools. The flow restriction is provided by a combination of one or more orifice(s) restricting fluid flow within the internal flow path, optionally coupled with relief feature(s) gradually increasing or decreasing a cross-section of the internal flow path, or by an orifice device. Flow restriction operates unidirectionally or bidirectionally relative to predominant fluid flow in attenuating pressure pulses.

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 the wellbore. Acid is injected into the wellbore such that the acid is in direct contact with the perforation tool, wireline and casing of 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.

A method of deploying plugging devices can include conveying a bottom hole assembly into a well, the bottom hole assembly comprising a plug deployment tool, and actuating the plug deployment tool, thereby dispensing at least one of the plugging devices from an interior of the plug deployment tool. A plug deployment tool can include a first chamber, a valve that isolates the first chamber from a second chamber, multiple plugging devices contained in an outer housing, and a piston that displaces one or more of the plugging devices out of the outer housing in response to the valve being opened. The second chamber can be disposed in the piston and can displace with the piston in response to the valve being opened.

Systems and methods presented herein facilitate coiled tubing operations, and generally relate to reduction of shock and vibrations to portions of the coiled tubing string. A device includes a first end configured to be disposed downstream of a bottom hole assembly of a coiled tubing drilling string; a second end configured to be disposed downstream of the first end and upstream of a drive of the coiled tubing drilling string; and a moveable valve configured to move from a first position to a second position to divert at least a portion of drilling fluid flow away from the drive when the drilling fluid flow is greater than a preset flow value or a weight on bit is less than a preset weight value and thereby reduce a rotation rate of the drive.

The present disclosure describes a borehole radar system (100) for a drill string (200). The system (100) includes a radar transmitter (102) placed within or adjacent to a housing of a bottom hole assembly (202) of the drill string (200). The radar transmitter (102) includes a transmit antenna (104) for coupling electromagnetic waves to the drill string (200) to propagate in a forward direction along an axis of the drill string (200) in one or more predefined modes including TEM, TE 11 and / or higher order modes. A radar receiver (106) is placed within or adjacent to the housing of the bottom hole assembly (202). The radar receiver (106) includes a receiver antenna (108) adapted to receive electromagnetic waves reflected or scattered from the surrounding medium (302).

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.

Examples described herein provide a computer-implemented method for performing automatic geosteering. The method includes receiving, by a processing system, formation evaluation data from a bottom hole assembly disposed in a wellbore. The method also includes determining, by the processing system, position data of a formation boundary from the formation evaluation data. The method also includes extrapolating, by the processing system, the position data to generate extrapolated position data of the formation boundary. The method also includes adjusting a trajectory of the wellbore based at least in part on the extrapolated position data of the formation boundary.

A method and / or system comprising: disposing a bottom hole assembly into a wellbore, wherein the bottom hole assembly comprises: a transmitter sub comprising a transmitter coil; a first receiver sub comprising a first receiver coil; transmitting an electromagnetic wave into a subterranean formation with the transmitter coil; receiving a plurality of response signals with the first receiver coil, wherein the plurality of response signals are from two or more depths and are formed from the electromagnetic wave interacting with the subterranean formation. Additionally, the method and / or system may be configured to analyze a gradient of the response signals to determine if the gradient exceeds a threshold, wherein the threshold indicates a presence of a fracture or fault.