898 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 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.

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 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.

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 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.

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.

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.

Herein are described methods and systems for characterizing noise and noise level in pressure measurements in a downhole pressure testing operation in formation testing while drilling. The pressure measurements are acquired using a formation testing tool disposed on a drill string. The methods include drilling a borehole, extending the one or more probes into an inner surface of the borehole, performing a pressure testing operation with a first mud pump rate, wherein the pressure testing operation comprises a drawdown period and a build up period, decreasing the first mud pump rate to a second mud pump rate while measuring pressure during the build up period, decreasing the second mud pump rate to a third mud pump rate while measuring pressure during the build up period, and calculating a noise associated with pore pressure measurements during the first pressure testing operation.

The invention relates to the technical field of drilling engineering, and particularly discloses an intelligent torque control method suitable for a high-torque drilling screw rod, and the method comprises the steps: collecting drill string vibration frequency data and bit pressure adjustment frequency data in real time in a drilling process, extracting a zero-sequence vibration frequency characteristic value in combination with sparse Fourier transform, and evaluating the vibration stability of a drill string; meanwhile, differential adjustment frequency is analyzed through empirical mode decomposition and Hilbert transform, differential adjustment frequency characteristic values are constructed to measure bit pressure adjustment stability, the two characteristic values are fused into a comprehensive characteristic vector, the comprehensive characteristic vector is input into a risk prediction model trained based on a random forest algorithm, and the bit pressure adjustment stability is improved. Intelligent identification of whether the drill column is in a high-frequency resonance critical state or not is achieved, and when it is judged that resonance risks exist, the system automatically triggers a torque compensation mechanism, and bit pressure and torque output are dynamically adjusted.

Wellbore operations include rotating a drill string in a wellbore. The drill string includes a rotary steerable system having at least three pads configured to contact the wellbore wall to steer a direction of drilling. The pads are simultaneously actuated while rotating the drill string to mitigate high frequency torsional oscillations.

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

A method can include receiving data acquired via a drillstring in a borehole in a subsurface environment; determining boundary locations for formations in the subsurface environment using at least a portion of the data, where an end of the borehole is disposed in one of the formations; determining extended boundary locations in the subsurface environment for a region beyond the end of the borehole using the boundary locations; determining a target location in the region; generating a trajectory from an end of the borehole location to the target location; and executing a directional drilling system to control directional drilling of the drillstring that extends the borehole beyond the end of the borehole towards the target location.

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.

A releasable and re-seat-able locking electrical wireline wet connection associated with sections of wireline used in an HDD drill string in a borehole. Said connection comprising a male member on one end of the wireline section having an externally exposed electrical contact receptacle that connects to a subsequent wireline section by mating and locking on to the female member. Mating is achieved by a simple “J”-shaped set of latching features, a second axis having a conductive part extending into a hollow body whereby the electrical contact element is fastened to the wireline coaxial center conductor for electrical continuity and with the wireline's protective armor also physically secured inside the hollow body for extreme mechanical and electrical integrity during the HDD drilling process. Reliable electrical connections are established and maintained notwithstanding wet and contaminated contacts and continuous rotation and wireline tension.

The invention provides an ultra-deep well large annulus flexible righting transverse vibration reduction method, which belongs to the technical field of well drilling and drilling, and comprises the following steps of: inputting pre-drilling well drilling engineering information, and calculating a whole well section drill string vibration distribution form based on an established drill string finite element dynamic model; the tripping-in positions and the number of the flexible stabilizers and the layer number and the compression space of plate springs in the flexible stabilizers are designed, and an initial vibration reduction scheme is generated; comparing the real-time vibration data with the predicted vibration distribution pattern, carrying out real-time risk assessment, carrying out dynamic optimization on the initial vibration reduction scheme according to the real-time risk assessment, adjusting the tripping-in position and number of flexible stabilizers, the number of plate spring layers and the compression space, and generating an optimized real-time vibration reduction scheme; a flexible stabilizer is put in the designated position of the drill column; when the drill column transversely vibrates and collides with the well wall, the buffer block of the flexible stabilizer is pressed, the plate spring is driven to generate radial elastic deformation, part of radial impact kinetic energy is converted into elastic potential energy of the plate spring to be stored, and radial vibration reduction is achieved.

The invention relates to the technical field of petroleum and natural gas drilling engineering, and discloses a deep well geological exploration tunneling parameter control system and method, and the system comprises a signal collection and synchronization module which collects drilling parameters and aligns timestamps; the initialization and modeling module is used for calculating fluid transmission time lag and blade skim-over frequency; the active disturbance generation module generates a target bit pressure instruction superposed with sine disturbance to drive load application; the two-channel feature extraction and verification module aligns the historical torque and the current pressure according to time delay and calculates the confidence coefficient in combination with the frequency; the adaptive decision and closed-loop control module uses the confidence coefficient to correct the gain and update the reference bit pressure to form a closed loop. A dual-channel verification framework based on fluid-structure interaction transmission time lag and blade characteristic frequency is constructed, the covering effect of long-distance drill column friction torque on real cutting torque in deep well operation is effectively stripped, and it is ensured that a control system only responds to effective rock breaking action.

A drill stem grease injector for a directional drill and associated methods are disclosed. Example drill stem grease injectors include a piston within an injection chamber, and a grease port in a side of the injection chamber, wherein grease port is configured to actuate before motion of the piston during an injection operation. Drill stem grease systems shown provide refill capabilities that reduce or eliminate a user's need to touch grease.

The invention discloses a drill string state real-time monitoring and analyzing method under limit drilling parameters, which comprises the following steps of: acquiring multi-source sensor data of a drill string in real time, and transmitting the acquired original multi-source sensor data to a data processing center in real time; de-noising and drift correction are carried out on the multi-source sensor data by adopting a self-adaptive filtering algorithm; the preprocessed multi-source sensor data are input into the multi-parameter fusion analysis model subjected to data equalization processing optimization, and the current drill string state is recognized; outputting a drill string state identifier by using a multi-layer neural network structure and a nonlinear activation function, and transmitting the drill string state identifier to a monitoring terminal on a drilling site in real time; and the data processing center classifies and stores the information in a distributed database. According to the invention, the working state information of the drill string under the complex working condition can be comprehensively and timely obtained, and the state of the drill string can be accurately identified. Major accidents are effectively avoided, and the personal safety of drilling operators and the safety of drilling equipment are guaranteed.

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.

The invention relates to the technical field of underground measurement-while-drilling data transmission, in particular to an electromagnetic wave mode-while-drilling conversion relay transmission method and system. The method comprises the following steps: acquiring measurement data and transmitting a signal through a double-insulation controlled dipole transmitting structure; receiving the measurement data signal through a repeater arranged along the drill string; determining an equivalent emission impedance characteristic by outputting a detection signal to an external medium and collecting an output end voltage and a current effective value; receiving a propagable guidance response formed by the measurement data signal; judging the type of the current well section based on the equivalent emission impedance characteristic and the propagable guide response; switching to a casing guide injection path or an open hole coupling injection path is selected according to the type of the well section; and carrying out relay forwarding on the signal based on the corresponding emission parameter group. Intelligent identification and conversion of signal modes are achieved, the relay transmission success rate and stability of cased well measurement data signals are improved, the link building distance is shortened, and power consumption and risks caused by working condition uncertainty are reduced.