1137 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.

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.

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.

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.

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.

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.

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.

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.

A pipe rack for a machine includes a drill carousel for supporting at least two drill strings. The drill carousel defines a first end and a second end spaced apart from the first end. The drill carousel includes a base disposed proximate to the first end of the drill carousel and a plurality of receptacles coupled to and extending from the base. At least two of the plurality of receptacles are adapted to at least partially receive a corresponding drill string from the at least two drill strings. The pipe rack also includes a retainer plate. The retainer plate is adapted to couple with the at least two drill strings. The pipe rack further includes at least one breaker plate disposed between the base and the retainer plate. The at least one breaker plate is spaced apart from the retainer plate along a first axis of the machine.

The invention belongs to a jet well washing process, and particularly relates to a high-pressure hydraulic jet well washing process for an in-situ leaching uranium mining layer. The in-situ leaching uranium mining layer high-pressure hydraulic jet well washing process comprises the following steps: step 1, drifting a well; step 2, ground testing; thirdly, a cleaning tool string is assembled and cleaned; and 4, pulling out of the hole. The high-pressure hydraulic jet well washing method has the advantages that 40 liquid pumping holes are cleaned in total in high-pressure hydraulic jet well washing, and in follow-up test effect tracking, the water quantity of 16 drilled wells (40%) is increased to 1.5 m < 3 > / h, and the maintaining time is longer than 150 d; when the liquid injection hole is removed, the effect of the hole washing mode is far better than that of a liquid pumping hole, the water amount is increased by 1.3 m < 3 > / h, and the maintaining time is only 32.5 d.

A rock housing for horizontal directional drilling machine includes a cylindrical housing body with walls defining a longitudinal cavity. A bearing assembly is provided as a part of the housing and is located above a bit box region of the housing. The bearing assembly is lubricated by drilling mud which flows through the drill string of the drilling machine, which mud flow is normally used for cooling the drill bit and removing cuttings. A portion of the drilling mud is diverted and passes through a gap formed between the bearing races of the bearing assembly, the gap being sized so as to create the necessary back pressure to divert the needed flow of drilling mud to the assembly.

Methods and systems are provided for drilling a secondary wellbore relative to a target wellbore, which involve drilling the secondary wellbore with a bottomhole assembly (BHA) that extends from a drill string. The BHA includes a magnetic field detector, a steering component, a drill bit, and at least one processor. The magnetic field detector is configured to detect a time- varying magnetic field generated from a rotating magnetic source of a drilling tool disposed in the target wellbore. The at least one processor is configured to i) use data output by the magnetic field detector to continually determine distance and direction or azimuth of the magnetic source relative to the BHA while drilling, and ii) use the distance and direction or azimuth of the magnetic source relative to the BHA while drilling to adjust the steering of the drilling performed by the BHA as controlled by the steering component of the BHA. The operations of the least one processor can be configured to adjust steering of the drilling of the BHA in order to maintain a set distance and direction or azimuth relative to the target wellbore, autonomously without surface input or interference, whilst drilling with the BHA.

A device and a method for changing the drill bits, tricone bits or DTH bits of drill strings on a drilling platform is describe herein, the device comprising an arm element (1) moveable in a rotating, vertical or horizontal manner. A post or supporting element (5) is connected to one of the ends of arm (1) and it is connected to arm (1) in such a way that it moves the arm. Element (5) serves as a base for arm element (1) and includes a drive unit (6)) allowing arm (1) to retract and extend in a controlled manner. A drill bit storage and receiving element (3) is at the other end of the arm (1), and element (3) has a rotating surface, in addition to having a hydraulic motor (7) or other type of motor to move same.

A torsional damping system includes a housing having an interior space. An inertia ring is located in the interior space, and a torsion fluid is located between the inertia ring and the housing. The inertia ring is rotatably installed relative to the housing. As the housing oscillates, the inertia ring damps at least a portion of the oscillation. The torsional damping system may be included in a downhole tool or bottomhole assembly, and used to damp oscillations along a drill string or along the bottomhole assembly, including between a downhole motor and a cutting tool.

The invention relates to the technical field of automatic control, in particular to a chip device for integrated control of an electric workover rig. According to the method and the device, through fine analysis of the job data, dynamic adjustment of the task priority in the job stage is realized, so that calculation resource allocation is more accurate, and the execution efficiency of the key task is improved. In the stress optimization process of the drill column, real-time monitoring on the lateral deviation trend is introduced, additional load calculation is conducted in combination with the stratum rebound influence, the overall stress of the drill column is more balanced, and the problem of abnormal stress concentration caused by lateral deviation is solved. The torque adjusting mechanism is dynamically optimized based on the stress distribution condition of the drill bit, it is ensured that the torque adjusting direction is matched with the stress trend of the drill bit, abnormal abrasion caused by uneven stress of the drill bit is reduced, and the drilling stability is improved. Trend analysis under various bit pressure conditions is adopted in drilling depth prediction, and in combination with a stratum permeability mapping relation, bit pressure adjustment is more reasonable, and the risk of sudden change of drill bit load is reduced.

The invention belongs to the technical field of petroleum drilling tools, discloses an intelligent-control friction-reducing, resistance-reducing and speed-increasing tool for a screw drill, and achieves the purpose of friction-reducing, resistance-reducing and speed-increasing. The lower portion of the tool is connected with a screw drill through a measurement-while-drilling pup joint, the upper portion of the tool is connected with an upper drill column, and the tool comprises a movable shaft connected with the screw drill; the mechanical transmission system comprises an inner shaft connected with the transmission shaft, the inner shaft rotates along with the transmission shaft to transmit torque, the friction sleeve is dynamically connected with the inner shaft through a gear clutch mechanism, and the driving assembly is used for driving the friction sleeve to move axially so as to adjust the friction force between the friction sleeve and the inner shaft; the tool face angle measuring system is used for measuring the tool face angle of the screw drill in real time and transmitting a measuring signal to the intelligent automatic control system; and the intelligent automatic control system is used for automatically regulating and controlling the friction force between the friction sleeve and the inner shaft according to the received measurement signal so as to balance the reaction torque generated by the drill bit of the screw drill and keep the tool surface stable.

The invention provides a blowout preventer and a rubber core sealing adjusting method, and belongs to the technical field of drilling equipment. The blowout preventer comprises an upper shell and a lower shell connected with the upper shell, the self-aligning blowout preventer further comprises a self-aligning assembly, and the self-aligning assembly is installed between the upper shell and the lower shell and is positioned and fixed through the upper shell and the lower shell; the self-aligning assembly comprises a first shell, a rubber core, an upper aligning unit and a lower aligning unit, the first shell is fixedly arranged between the upper shell and the lower shell, the rubber core is arranged in the first shell and makes contact with the upper aligning unit and the lower aligning unit which are installed in the first shell, and the upper aligning unit is used for adjusting the position between the upper portion of the rubber core and the drill rod. The technical problem that in the prior art, in the dynamic well drilling process of a drill column, due to heterogeneity of stratum lithology, the drill column generates high-frequency vibration, so that sealing deviation of a rubber core of the rotary blowout preventer and a drill rod causes sealing failure can be effectively solved.

The invention discloses a wireless measurement-while-drilling directional drilling protection pore-forming drilling tool which comprises a directional drill bit, a hollow screw motor short section, a hollow non-magnetic short section, a drill rod and a water feeder which are sequentially communicated from front to back, and the water feeder is connected with a pressure sensor; a first overflowing channel is arranged in the directional drill bit; a second overflowing channel is arranged in the hollow screw motor short section; the hollow non-magnetic short section comprises a non-magnetic short section outer pipe and a recoverable wireless measurement-while-drilling instrument assembly arranged in the non-magnetic short section outer pipe in a sleeved mode. According to the drilling tool, the recoverable wireless measurement-while-drilling instrument assembly is arranged in the non-magnetic short section outer pipe, wireless measurement-while-drilling in the drilling process can be achieved, and the measurement instrument assembly can be recovered without lifting the drill after measurement is completed; after the recoverable wireless measurement-while-drilling instrument assembly is lifted out, a physical channel can be provided for lowering of the screen pipe while drilling, and therefore wireless measurement-while-drilling directional drilling and protection integrated construction is achieved.

The invention relates to the field of offshore oilfield development, and discloses an offshore drilling well control automation simulation system and an operation debugging method thereof.The offshore drilling well control automation simulation system is characterized in that an upper computer is connected with a PLC control box through an optical fiber, and a controller transmits a control signal to the PLC control box through the optical fiber; the PLC control box transmits information of the sensors arranged at the key connection points to the controller through optical fibers; the throttle manifold and control device is connected with the PLC control box through an optical fiber to simulate fluid flowing out of the annulus to generate a throttling effect; the blowout preventer group and the control device are connected with the PLC control box through a cable; the liquid circulation simulation device is connected with the PLC control box through a cable and simulates liquid circulation during well drilling. The gas invasion annulus simulation device is connected with the PLC control box through a cable and simulates gas invasion annulus during well drilling; the simulation top drive and the simulation winch are connected with the PLC control box through cables until the simulation drill column is located at a preset position. According to the invention, manual misoperation probability and manual operation time can be reduced, and offshore drilling well control efficiency can be improved.