1481 results about "Drill string" patented technology

In one aspect of the present invention, a drill string has a drill bit with a body intermediate a shank and a working face. The working face has a plurality of blades converging at a center of the working surface and diverging towards a gauge of the working face. At least one blade has a cutting element with a carbide substrate bonded to a diamond working end with a pointed geometry. The diamond working end also has a central axis which intersects an apex of the pointed geometry. The axis is oriented between a 25 and 85 degree positive rake angle.

The invention provides an intelligent drilling guide method and system for a petroleum drilling tool face, and relates to the technical field of intelligent control, and the method comprises the steps: determining a first target point, a second target point and a third target point in the process of tracking a target azimuth angle according to a dynamic adjustment instruction; constructing a dynamic triangle through the first target point, the second target point and the third target point, and taking the barycentric coordinate of the dynamic triangle as an azimuth angle correction value; correcting forward and reverse rotation angles and periodic parameters of the drill string according to the azimuth angle correction value so as to obtain a corrected dynamic adjustment instruction; and controlling a drill string to act based on the corrected dynamic adjustment instruction, so that the underground tool surface continuously approaches the target azimuth angle through closed-loop iteration adjustment. The control efficiency and stability of the tool face under the complex working condition can be improved.

Vibrations in a drill string are damped with a sleeve that circumscribes and is rotatable about a portion of the drill string. Ribs project radially outward from an outer surface of the sleeve and into sidewalls of the wellbore to rotationally couple the sleeve and wellbore. A coupling device restricts free rotation of the sleeve about the drill string, and which is selectively engaged to counteract vibrational forces in the drill string. The coupling device can include a clutch-like device to introduce friction between the drill string and the sleeve, that is powered hydraulically or electrically. Activating the coupling device is based on a timer or in response to vibration sensed in the drill string.

An apparatus, that is part of a drill string for drilling a wellbore in a subsurface formation, comprises a drill bit that includes at least one electrode coupled to a power source, the at least one electrode to periodically emit an electrical discharge based on electrical pulses received from the power source; and a first port to output a first type of drilling fluid having a different composition than a second type of drilling fluid to flow downhole for removal of cuttings, wherein the electrical discharge is to be transmitted through the first type of drilling fluid and through a rock of the subsurface formation.

The invention discloses a drill string vibration identification and regulation method based on multi-modal data fusion, and belongs to the crossing field of petroleum drilling and artificial intelligence. According to the method, multi-modal input fusing space and time-frequency information is constructed by using a three-axis vibration acceleration signal of an underground drill string and a three-channel time-frequency diagram corresponding to the three-axis vibration acceleration signal. Through a deep neural network in which BiGRU and ResNet18-SENet are combined, an attention mechanism is fused, and accurate recognition of complex vibration modes such as general vibration, stick-slip and vortex motion is realized. Further combining the recognition result, driving the self-adaptive regulation and control of drilling parameters, and realizing the closed-loop control of the vibration state of the drill string. The method has the advantages of being high in recognition precision, high in robustness, intelligent in regulation and control and the like, and is suitable for underground vibration monitoring and drilling parameter optimization in a complex stratum environment.

This invention relates to a drill string (32) for use with micro tunnelling apparatus (1) having a cutter (21) at a distal end of the drill string (32) and external drive mechanism (2) at a proximal end of the drill string (32). The drill string (32) being formed by a plurality of connected string segments (13), each string segment (13) with a drive shaft (33) aligned along the central axis for rotation there about and an elongate casing (34) that houses the drive shaft (33). The front end of one string segment (13) is adapted to connect with the back end of another string segment (13) to form the drill string (32) by way of a latch connection, the latch connection being adjustable so as to vary the tolerance between said front end of one string segment (13) and said back end of another string segment (13) while connected.

Vibration in a drill string is damped with a damping system coupled to the drill string. The damping system includes a chamber, a gas and piston in the chamber, and a mass connected to the piston. The gas defines a spring having a spring coefficient that is dependent on a volume or temperature of the chamber. The damping system is tunable in real-time by varying the volume or temperature of the chamber. In alternatives with multiple chambers interconnected to one another via ports, chamber volume at the existing pressure can be varied by selective actuation of valves between the chambers or the pressure of the gas can be varied by compressing or expanding a connected bellows or by heating or cooling the temperature of the gas. The damping system can selectively damp both radial and torsional vibrations.

Shown and described herein is a choke assembly for use with a downhole drill string. The choke assembly may include a rotating choke carrier, a stationary seat disposed on the rotating choke carrier and a rotating choke positioned adjacent to the stationary seat to create a seal surface. The choke assembly may further comprise a biasing mechanism applying a biasing force to press the rotating choke against the stationary seat and a flow port within the stationary seat which controls drilling fluid to allow some drilling fluid to become a bypass fluid and pass through the stationary seat.

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 invention relates to the technical field of petroleum drilling engineering, and particularly discloses an analysis and prediction system based on petroleum drilling and production data, which realizes virtual reconstruction of a physical drilling system by constructing a digital mapping body, and adopts a multi-source sensor network to collect drill string vortex frequency and wellbore temperature field gradient data. Forming a time sequence feature set through time sequence alignment and fusion processing; performing differential transformation and modal decomposition on the feature set to extract transient response feature vectors and generate a risk distribution diagram; establishing a parameter-risk correlation model, and decoupling mechanical vibration and thermal stress interference by solving a physical equation to obtain a dynamic risk index; the risk indexes and the process parameters are mapped to a three-dimensional grid to construct a multi-dimensional feature space, a feature fusion grid is adopted to achieve information aggregation and reconstruction, and comprehensive risk assessment indexes are generated; a dynamic early warning threshold value is established according to the evaluation indexes, and drilling parameters are optimized in real time through closed-loop control.

The invention discloses a well drilling vibration measurement and real-time calibration system based on a vibration sensor, and relates to the technical field of data processing. The system comprises a signal measurement part, a signal correction compensation part, a signal analysis part and a signal calibration part, the signal measuring part is used for installing a vibration sensor and an accelerometer near a drill bit or a drill column and generating a fundamental frequency vibration signal; the signal correction compensation part is used for performing stick-slip effect compensation on the fundamental frequency vibration signal to obtain a first compensation signal; calculating the resonant frequency of the drilling system; calculating the bending stress of the drill string; calculating well track deviation; the signal analysis part is used for calculating the dynamic load of the drilling system to obtain the vibration energy dissipation of the drilling system; calculating the system response of the drilling system; and the signal calibration part is used for calculating a calibration coefficient. According to the invention, the precision and calibration capability of vibration signal measurement are significantly improved.

A method can include acquiring resistivity measurements using a downhole tool of a drillstring disposed in a borehole in a subsurface environment; performing a resistivity measurement-based inversion to generate a structural representation of a portion of the subsurface environment that includes an end of the borehole; generating a control instruction using an artificial intelligence framework and the structural representation, where the control instruction is for lengthening the borehole along a current borehole trajectory or a different borehole trajectory; and controlling the drillstring to lengthen the borehole based on the control instruction.

This disclosure relates to a predictive lookahead system that generates simulated or predicted wellbore trajectory plans in a drilling environment and determines when a simulated wellbore trajectory plan is at risk based on various lookahead metrics, such as torque and drag (T&D) metrics and hydraulic pressure metrics. For instance, the predictive lookahead system uses a predictive framework with various steps to determine if drilling metrics for a predictive wellbore trajectory plan, such as T&D metrics and / or hydraulic pressure metrics corresponding to subsurface formations, may exceed one or more risk threshold limits and cause damage to the drill bit, drill string, casing, and / or surface rig. The predictive lookahead system determines whether a predictive wellbore trajectory, which aims to converge with a previously planned wellbore trajectory, can proceed safely along the projected trajectory without exceeding T&D, pressure window, or other lookahead metric limits in the wellbore.

A method can include receiving data for a bottom hole assembly of a drillstring and a drill plan; generating candidate trajectories using at least a portion of the data; generating drill command schedules for the candidate trajectories; ranking the candidate trajectories based at least in part on the drill command schedules; and outputting at least a top ranked candidate trajectory and its corresponding drill command schedule.

The invention belongs to a drilling operation tool, and particularly relates to a rock breaking drilling simulation experiment bench of a drilling tool system. The rock breaking drilling simulation experiment bench of the drilling tool system is mainly composed of a main frame, a bottom frame, a hydraulic cylinder, a power module, a vibration measurement module and a bit pressure-torque measurement module. A certain drilling tool combination can be selected to perform a drilling experiment on a certain rock, a single-drill-bit rock breaking or / and while-drilling reaming rock breaking drilling operation experiment can be realized, and drilling pressure, rotating speed, torque and drilling tool and drill bit vibration and motion trail parameters are acquired in a multi-point manner; the experiment bench is provided with a hydraulic lifting device, so that conditions of a horizontal well, a vertical well, an inclined well and the like can be simulated. According to the invention, different drilling operation modes such as simulation of a horizontal well, a vertical well and different types of boreholes with different inclination angles, single-drill-bit drilling and reaming while drilling can be realized, the universality of the experiment bench is improved, and diversified and perfect experiment conditions are provided for related research.

A system and method that may include receiving real-time downhole data from one or more sensors of a drillstring disposed in a borehole in a subsurface geologic region during a directional drilling operation. The system and method also include selecting a drillstring drilling mode from a plurality of drillstring drilling modes. The system and method may additionally include predicting, in real-time, characteristics of a hole bottom of the borehole using the drilling mode model and at least a portion of the real-time downhole data. The system and method may further include controlling the directional drilling operation using one or more of the characteristics.

A longitudinally extending detector drill rod is connectable at each of its longitudinal ends to another drill rod in a drill string and is deployable, as part of the drill string, to a location below a surface of the earth for detecting cosmic ray muons that penetrate the surface of the earth. The detector drill rod comprises: a drill rod bore-defining surface that defines a longitudinally extending drill rod bore; and one or more muon sensors located in the drill rod bore, the one or more muon sensors responsive to muons interacting therewith.

The invention discloses a safety analysis method for a deepwater riser-free drilling string considering vortex-induced vibration, which comprises the following steps of: S1, simulating the deepwater riser-free drilling string according to related parameters, and simulating the vibration condition of the drilling string in the actual drilling process; s2, establishing a seawater section drill string mechanical model, and calculating dynamic characteristics of the seawater section drill string under different influence factors; s3, establishing a mud line boundary, and taking the sea water section drill string parameters as initial parameters of a stratum section drill string; s4, calculating and considering the dynamic characteristics of the drill string of the stratum section under the drill string-well wall contact and drill bit-stratum coupling effects; s5, analyzing the drill string according to the dynamic characteristics; and S6, predicting the safety condition of the drill column. According to the method, the effects of the marine environment load and the stratum are considered at the same time, the overall dynamic characteristics of the riser-free drilling string are obtained, and theoretical guidance is provided for guaranteeing the safety of the riser-free drilling string in the later period.

The invention discloses a torsional pendulum drilling string dynamical model and a torsional pendulum control parameter prediction method. The torsional pendulum control parameter prediction method comprises the following steps: S1, establishing the torsional pendulum drilling string dynamical model; s2, solving the torsional pendulum drilling drill string dynamic model to obtain drill string torsional pendulum control parameters; the method specifically comprises the following sub-steps that S21, a drill string is divided into m units and m + 1 nodes, and a time sequence division method is adopted to form a grid with a time domain and a space domain; s22, inputting parameters, and setting a time step length, a space step length, a time node and a space node; s23, initializing the space-time node, and setting a convergence condition; s24, carrying out iteration on the space-time nodes until a convergence condition is met; and S25, according to an iteration result when the convergence condition is met in the step S24, drill column torsional pendulum control parameters are calculated. According to the method, the torsional pendulum control parameters of the drill column in the torsional pendulum drilling process can be accurately predicted, and technical support is provided for optimizing the drilling parameters on site and improving the torsional pendulum drilling effect.

The invention discloses a downhole casing pipe external windowing experiment device and method, and belongs to the technical field of downhole casing pipe windowing, the downhole casing pipe external windowing experiment device comprises an experiment bench, an angle control mechanism, a drilling mechanism and a drill column mechanism, the angle control mechanism is arranged on the experiment bench and used for adjusting the position of a casing pipe, and the drilling mechanism is arranged on the experiment bench and used for controlling the drilling mechanism; a first driving assembly of the drilling mechanism is used for driving a working plate to move in the direction close to the outer wall of the casing pipe, and a first pressure sensor is used for detecting thrust of the first driving assembly. A first servo motor of the drill string mechanism can drive a drill rod to drive a milling shoe to rotate so as to open a window from the outer wall of the casing pipe, a torque sensor is arranged between an output shaft of the first servo motor and the drill rod and used for detecting the cutting torque of the milling shoe, and a second pressure sensor is arranged on a working plate and used for detecting the cutting pressure of the milling shoe on the casing pipe. The underground casing pipe external windowing experiment method adopts the underground casing pipe external windowing experiment device. According to the method, data support is provided for an actual casing pipe external windowing process, and the windowing quality is improved.

The invention discloses a low-frequency model building method and device, equipment and a medium, and relates to the field of seismic data inversion and reservoir prediction, and the method comprises the steps: obtaining underground near-bit engineering parameters, carrying out the motion characteristic analysis and excitation characteristic analysis of the underground near-bit engineering parameters, and obtaining the motion characteristics of a shaft bottom drilling tool and the excitation characteristics of bit pressure and torque; establishing an initial drill bit-drill string system dynamic control equation by using the motion characteristics of the well bottom drilling tool and the bit pressure torque excitation characteristics, and performing parameter correction and supplementation on the initial drill bit-drill string system dynamic control equation to obtain a target drill bit-drill string system dynamic control equation; and solving the dynamic control equation of the target drill bit-drill string system to obtain a dynamic response value, and identifying and analyzing the motion state of the underground drilling tool based on the dynamic response value. According to the method, the accuracy of state recognition of the underground drilling tool can be improved, so that the profit level of a long horizontal section shale gas drilling single well is improved, the well building period is shortened, and the drilling cost is reduced.

A method may include receiving real-time data relating to drilling fluid for drilling operations that utilize a drilling fluid system that includes tanks and pumps, where the drilling operations include operations that pump the drilling fluid to a drill bit on a drillstring that rotates to extend a borehole in a formation, and where the drilling fluid flows to an annulus between the drillstring and the formation to apply pressure to the formation; detecting a tank state from a group of tank states based at least in part on the real-time data, where the group of tank states includes tank states defined with respect to one or more operations of the pumps; and detecting a change in tank volume, based at least in part on the tank state, as an indicator of an undesirable interaction between the drilling fluid and the formation.

In an example, a tubular slip for a drill rig can include a plurality of size adjusting systems which can be radially arranged about a well access hole of the drill rig and can be configured to cooperate to adjust a diameter of a through opening of the tubular slip to accommodate various tubular sizes. The tubular slip can also include a slip component which can include a wedge arranged on a radially inner portion of each of the size adjusting systems and can be configured to cooperate to further constrict the diameter of the through opening when a drill string is suspended by the tubular slip.

An electronically controlled full rotary clutch controller includes a drive assembly, an executive assembly and an auxiliary assembly. The device can have two working states: directional drilling and compound drilling. When compound drilling, drilling parameter information is obtained through the main control board, and the data is fed back to a ground processing system, which transmits a control signal to the main control board. The main control board controls a rotating motor, and pushes a screw sleeve and a push block shaft on a ball screw. The push block shaft pushes a push block radially, and a mandrel shell transmits torque to a roller shell through the push block. The roller shell and the mandrel shell rotate together to realize compound drilling. When directional drilling, the main control board reverses the rotary motor, the push block shaft pulls the push block radially, and the roller shell does not rotate.

The invention provides a drill string vibration reduction method and device.The method comprises the steps that longitudinal vibration data and torsional vibration data of a target drill string when a vibration reduction tool is tripped into multiple positions are obtained, and the longitudinal vibration data comprise hook load, a mass matrix, a stiffness matrix, a structural damping matrix, a drilling fluid damping effect matrix, a speed vector and an acceleration vector; the torsional vibration data comprises a rotational acceleration vector, a rotational speed vector, a rotational inertia matrix, a torsional rigidity matrix, a torsional structure damping matrix and a torsional drilling fluid damping matrix; the vibration intensity of the whole well section is determined by applying the longitudinal vibration model, the torsional vibration model, the longitudinal vibration data and the torsional vibration data; and according to the vibration intensity of the whole well section, the optimal tripping-in position of the vibration reduction tool is selected from all the positions, the vibration reduction tool is tripped into the optimal tripping-in position, and the vibration reduction process of the target drill column is completed. The reliability of the tripping-in position of the vibration reduction tool can be improved, and then the vibration reduction effect of the drill column can be improved.

The invention relates to the technical field of aluminum alloy drill rods, in particular to an aluminum alloy drill rod body thread high-temperature fatigue life prediction method, which comprises the following steps: establishing a drill string dynamic model to obtain load spectrum initial data; establishing an aluminum alloy drill rod body thread thermal-mechanical coupling finite element model to obtain initial stress-strain distribution; performing a high-temperature fatigue test to obtain fatigue life data of the aluminum alloy material at different temperatures; establishing a high-temperature fatigue damage model; and constructing a high-temperature fatigue life prediction model based on the load spectrum initial data, the initial stress-strain distribution, the fatigue life data and the high-temperature fatigue damage model. Therefore, the problems that the fatigue failure mechanism of the aluminum alloy drill rod body thread in the high-temperature environment is not explored, the coupling effect of creep damage and fatigue damage is not fully considered, the influence rule of vibration load characteristics on the fatigue life and the failure mode is not clear, and engineering practice cannot be accurately guided are solved.

A drill string tool can be used in a drilling system, with the drill string tool configured for wireless communication. The drill string can include a central structural member, a wire coil, an antenna core, and a wear protection shell. The antenna core can surround the central structural member. The wire coil can be positioned around an outside of the antenna core, with the antenna core and the wire coil forming an antenna assembly. The antenna assembly can be configured to wirelessly transmit the data signals from electronics associated with the drill string tool. The wear protection shell can surround the antenna assembly and be configured to minimize a formation of eddy currents therein during operation of the antenna assembly. In an embodiment, the drill string tool can be a drill head wireless transmitter.

The utility model provides a horizontal and vertical drilling rig, which relates to the technical field of drilling rigs, and includes a mainboard, a control room is fixed on the top of the mainboard, a fixed block is fixed on the bottom of the mainboard, crawler assemblies are installed on both ends of the fixed block, and a bracket is fixed on one end of the fixed block. Through the arrangement of springs and dampers, when the drill string drives the drill bit to drill holes, the springs and dampers can buffer the force of the drill bit hitting hard objects, thereby avoiding the drill bit from being broken and damaged due to sudden and violent impacts. The utility model is more practical. Through the arrangement of the scale plate, the extension plate and the pointer, when the first motor is running, the rotating block connected to the connecting column will be driven to rotate, thereby driving the frame to rotate as a whole. When the frame rotates as a whole, the extension plate and the pointer will be driven to rotate, and the position of the pointer moving on the circular scale plate can accurately obtain the angle of rotation of the frame.

A device for damping vibrations of a rotary drill string in motion in a wellbore, a related method, drill string and drill string sub or section, where at least one component of motion of the drill string is communicated to the device, and brake means counter the vibrations, resisting the motion in dependence upon the speed of motion. The device may have an outer sleeve arranged on an inner, tubular body which is rotatably arranged within the outer sleeve. Roller wheels support the sleeve on the wellbore wall and facilitate longitudinal movement of the device and prevent rotational slipping of the outer sleeve relative to the wall upon rotating the tubular body and drill string. One brake part of the brake means on the outer sleeve and another on the tubular body operate to resist rotational vibration components.

The invention relates to the field of drilling ship manufacturing, in particular to a data acquisition method and system of a driver for oil exploitation. Six-degree-of-freedom motion data of a ship motion reference unit, pressure data of a hydraulic cylinder of a marine riser tensioner, hook load data of a drill string hung by a top driving system, torque data and radial acceleration data are synchronously collected, and collected multiple paths of signals are aggregated to form synchronous multi-source vibration data flow. According to the method, multiple types of vibration, load and pressure signals are synchronously collected and aggregated and segmented under the unified time reference in the operation process of the drilling ship, so that the consistency of multi-source data on the time scale is ensured, and the real dynamic coupling relation can be reflected by subsequent calculation; in the signal processing stage, key acceleration and pressure fluctuation information are extracted, and the actual working state of the marine riser system is represented through dynamic response characteristics constructed by the peak position, the peak amplitude and the power spectral density.