583 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 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.

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.

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.

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 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.

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.

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.

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. These are simultaneously actuated while rotating the drill string to mitigate stick slip, harmonic stick slip, or backward whirl oscillations.

The invention discloses a method for recognizing the batch stand column connecting and detaching working condition of a drilling machine through logging real-time data. The method comprises the steps that batch stand column connecting and detaching working condition samples in drilling historical data are counted; determining working condition charts of batched upright post connection and batched upright post disassembly; the normalized working condition charts of batch connection and batch disassembly of the stand columns are obtained; obtaining a standard comparison chart of the working conditions of batch connection and batch disassembly of the stand columns; obtaining height wave crest and wave trough values of the hook; obtaining possible batched connection and disassembly stand column charts in the real-time data; calculating the similarity of the two by using a Pearson's correlation coefficient method; if the similarity meets the judgment requirement, the captured window working condition is accurately recognized as the corresponding batched stand column connecting and disassembling working condition. According to the method, a specific rule is set to identify batch connection and batch disassembly data windows; a standard comparison plate of batch connection and batch disassembly is established, and accurate recognition of batch connection and batch disassembly of the stand columns is achieved by comparing real-time data with the standard comparison plate.

This invention relates to the field of oil and gas drilling engineering technology, and particularly to an active straightening drill string and well deviation control method based on umbrella-shaped corner contact sensing. The method includes: an umbrella-shaped corner contact sensing unit comprising multiple sets of linkage units, with a contact switch sensor integrated on the contact sensing rod of each linkage unit; a straightening unit comprising two robotic arms, two push blocks, and a linear drive assembly; a control unit electrically connected to the contact switch sensor, the robotic arms, and the push blocks; the contact switch sensor outputs a wellbore contact signal, and the control unit receives the wellbore contact signal to control the two robotic arms to press against the wellbore for auxiliary straightening, thereby controlling the two push blocks to move away from each other and press against the wellbore for active straightening. This invention utilizes a purely mechanical contact sensing principle, eliminating the need for complex electronic measurement circuits and improving the operational reliability of the drill string under harsh drilling conditions; the straightening method combining the robotic arms and push blocks effectively ensures the accuracy and stability of the push force control.

This invention relates to the field of exploration and development, and discloses a method, system, and equipment for quantitative analysis of friction resistance in directional drilling. The method includes: acquiring logging information and drill bit speed in the drilled section; constructing a drilling speed prediction model using the drill bit speed and the composite drilling data; determining a bottom hole pressure prediction model based on the directional drilling data and the drilling speed prediction model; combining the bottom hole pressure prediction model with the surface pressure to determine a drill string axial friction resistance model; and calculating the axial friction resistance in the real-time directional drilling process using the drill string axial friction resistance model based on the logging information and drill bit speed. The quantitative friction resistance analysis method disclosed in this application solves the problem of difficulty in accurately assessing bottom hole pressure and axial friction resistance, enabling dynamic assessment of theoretical bottom hole pressure and axial friction resistance. It allows for full-process monitoring and post-drilling analysis of sliding drilling, providing a basis for improving the bottom hole drill string load condition.

This invention discloses a core retrieval or recovery tool for drilling, relating to the field of drilling engineering technology. The internal drill string assembly is suspended within the central channel of the external drill string assembly via a centralizer. The lower end of the internal assembly is a retaining spring assembly, and the lower end of the external assembly comprises the drill bit and multiple sliding blocks. One end of each sliding block extends into one end of the drill bit and is suspended by an elastic element. One end of the retaining spring assembly passes through the drill bit and extends between the sliding blocks, with the outer wall of the retaining spring assembly engaging with the inner wall of each sliding block via a bevel. Drilling fluid is introduced into the internal drill string assembly, causing it to move downwards relative to the external assembly. The downward movement of the retaining spring assembly pushes the sliding blocks outwards away from the drill bit's centerline. When the internal drill string assembly resets, the elastic element drives the sliding blocks back towards the drill bit's centerline. This invention improves drill string throughput and prevents the loss of incomplete or fragmented core samples at the drill bit, thereby increasing the core retrieval rate or core recovery rate.

A mud pulse telemetry system is disclosed including a drill string positioned within a wellbore, a restriction positioned within the drill string and configured to create a pressure differential between a high pressure region and a low pressure region of the drill string, a piston including a piston opening positioned within a piston chamber and movable along an axis between a first position and a second position, a valve movable to selectively open the piston opening, and a pulser coupled to the piston and positioned for movement within the drill string along the axis. The pulser includes a pulser body having at least a portion thereof with a non-linear profile and a conduit extending through the pulser body and facilitating fluid communication between the drill string and the piston chamber. Movement of the pulser body generates a pressure wave through mud within the drill string.

The invention belongs to the technical field of petroleum and natural gas drilling, and provides an accurate jam releasing device and method, and the jam releasing device comprises a shell, a power module, an anchoring module, a vibration module and a sound wave receiving and transmitting identification module; the sound wave receiving and transmitting identification modules are arranged at the top and the bottom of the inner side wall of the shell and used for sending and receiving sound signals, identifying the position of a drill column sticking point and controlling starting and stopping of the anchoring module and the vibration module; the anchoring module is arranged in the middle of the shell and used for fixing the jam releasing device to the inner wall of a drill string water hole, and accurate positioning of a drill string sticking point is achieved. The vibration module is arranged in the shell, located below the anchoring module and used for driving the whole jam releasing device to vibrate and assisting jam releasing operation. The power module is arranged in the shell and located above the anchoring module, and the power module is electrically connected with the sound wave receiving and transmitting recognition module, the anchoring module and the vibration module and provides energy for starting of the whole jam releasing device.

A method including drilling a wellbore using a drill bit connected to a drill string. The drill string includes a vibrational energy harvester and a tool disposed inside a casing of the drill string. The vibrational energy harvester includes a stator including a conductive coil, and a rotor including magnets disposed outside the conductive coil. The rotor is unpowered. The rotor is free to rotate outside the conductive coil, and the rotor is unattached to other components of the drill string. The method also includes generating vibrations in the drill string by engaging the drill bit to a bottom of the wellbore. The method also includes harvesting electricity generated in the stator as the rotor rotates in response to the vibrations. The method also includes supplying, via an electrical connection between the stator and the tool, the electricity to the tool.

A table bushing lifting ring and method for automatically lifting a table bushing during drill bit changing. The method includes providing a drill string and bit sub with a step formed thereon, positioning a table bushing lifting ring on the step, the lifting ring including a plurality of flanges extending beyond the step, lowering the drill string such that the table bushing is received within a deck aperture, providing an automated bit handling mechanism slidable between a standby position during the lowering step where the mechanism is not centered with the drill bit or pipe and an engaged position where the bit handling mechanism is centered with the drill bit or pipe, separating the lifting ring from the table bushing as the drill string is lowered, retracting the same, and lifting the table bushing out of the aperture via engagement between the lifting ring flanges and the table bushing.

An earth boring system includes a drill-out bit disposed at a distal end of a drill string. The drill-out bit includes blades. The system also includes a casing drill bit that has a drill bit body with a bottom profile. The bottom profile at least partially matches a profile of the blades of the drill-out bit. The drill-out bit is operable to drill through the casing drill bit.

This invention discloses an intelligent directional closed-loop control method and system for a curved-shell screw drill string assembly. The method includes intelligent switching control of sliding / compound drilling modes and intelligent tool face control. The intelligent switching control of sliding / compound drilling modes uses a single drill string or column as the controlled object, intelligently designing the sliding / compound drilling length of the single drill string or column to be drilled and the switching scheme between the two, which is executed by an automated actuator to achieve intelligent switching between sliding / compound drilling. The intelligent tool face control includes changing the drill pressure control tool face and the wellhead rotary drill string control tool face. Before tool face control, the tool face control parameters are intelligently designed and executed by an automated actuator to achieve intelligent closed-loop control of the tool face. This invention can avoid the large amount of non-drilling time consumed by repeated adjustments, improving drilling efficiency.

The fluid circulation device for the drilling equipment comprises a supply mechanism, a conveying mechanism and a driving mechanism which are sequentially communicated, and the driving mechanism is configured to be connected with a drill column, can drive the drill column to work and allows fluid from the conveying mechanism to move to the drill column. Thus, the supply mechanism, the conveying mechanism and the driving mechanism jointly define a passage for fluid movement. And valves for opening or closing the passages can be selectively arranged on the supply mechanism and the driving mechanism. In this way, when fluid circulation needs to be formed, all the valves in the passage need to be opened, and when fluid circulation needs to be stopped, any valve in the passage is closed, so that the passage for fluid movement can be interrupted. Therefore, the technical problems that in the prior art, the opening and closing modes of a fluid circulation channel are single, and the stability is low during equipment operation are solved.

A drill string comprising: an elongate hollow main length section (101); a male casing portion (108) provided at a second end (106), the male casing portion having an externally threaded section (107) and a non-threaded shank (109) axially positioned intermediate the main length section (101) and the threaded section (107); the shank (109) having a transition section (206) positioned adjacent a radially protruding shoulder (110) at the second end (106) or the main length section (101), the transition section (206); wherein a cross-sectional shape profile of an outer surface of the transition section (206) in a plane of a longitudinal axis (204) comprises a segment of an ellipse having a semi-major axis (a), a semi-minor axis (b); wherein a ratio of the semi-major axis to the semi-minor axis (a:b) is within a range 2b

This invention provides an operating platform and wellhead equipment. The operating platform includes: a connecting structure comprising a detachably connected first connecting plate and a second connecting plate; a platform body integrally formed with the second connecting plate; a retractable core-filling mechanism disposed on the lower surface of the platform body, comprising an outer core-filling mechanism and an inner core-filling mechanism, the outer core-filling mechanism comprising a first telescopic device and an outer core-filling component connected to the telescopic end of the first telescopic device, the inner core-filling mechanism comprising a second telescopic device and an inner core-filling component connected to the telescopic end of the second telescopic device, the outer core-filling component and the inner core-filling component being arranged opposite to each other to form at least two drill string passage holes for different specifications of drill strings to pass through; and a retractable fork disposed on the upper surface of the platform body, comprising a third telescopic power and a pad fork detachably connected to the telescopic end of the third telescopic power. This invention can accommodate the passage of multiple specifications of drill strings and can also assist in wellhead drill pipe uncoupling operations.

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.

The invention relates to the technical field of safety protection, in particular to a protection device for well drilling safety engineering, which comprises a derrick and a drill column, a drill bit is fixedly connected to the bottom of the drill column, a drill floor is fixedly connected to the lower part of the derrick, protection plates are fixedly connected to the periphery of the bottom of the drill floor, a protection cavity is formed at the bottom of the drill floor, and each protection plate comprises an outer layer plate and an inner layer plate; a plurality of springs are arranged between the outer-layer plates and the inner-layer plates, the tops of the outer-layer plates are fixedly connected with the corresponding edges of the bottom of the drill floor, and the bottoms of the outer-layer plates are fixedly connected with the ground; the tops of the inner-layer plates are in sliding fit with the bottom of the drill floor, and transmission assemblies used for decomposing stress of the inner-layer plates to provide supporting force for the drill floor are arranged on the outer-layer plates. By means of the design of the protection plate of the double-layer structure, buffering is formed on impact of drilling splash, the service life of the protection plate is prolonged, and meanwhile the impact force of the splash is converted into supporting force on the drill floor through the transmission assembly so as to reduce vibration of the drill floor.

The invention particularly relates to an intelligent routing inspection scheduling method based on 5G big data fusion, and relates to the technical field of water area drilling guiding and routing inspection scheduling, and the method comprises the steps: coupling geology, drill string mechanics and a guiding tool response model to construct a digital twin system, and combining an LSTM prediction model to quantify a rail deviation risk; and generating a grading task based on the trigger condition, and scheduling inspection resources. According to the method, multiple physics fields are coupled to construct a digital twin system, the LSTM prediction model is matched to realize accurate track prediction in the future 10 m, the track deviation risk is quantified through the three-dimensional Euclidean distance, post deviation correction is upgraded to pre-deviation prevention, an intervention time window is reserved in advance, a high-risk scene is effectively avoided, the strict requirement of underwater drilling engineering for the guiding precision is met, and the method is suitable for large-scale popularization and application. And the core pain points of fuzzy track and delayed deviation correction in the traditional technology are solved.

The invention discloses a site multifunctional tubular column processing device and a drilling tool feeding and throwing method thereof. The device comprises a base, a turnover arm assembly is hinged to one end of the base, and the turnover arm assembly can turn over relative to the base so as to be switched into a horizontal state / a vertical state; the turnover arm assembly comprises a main body frame, at least one group of holding clamps is arranged on the main body frame, the holding clamps can hold / release a drilling tool placed on the turnover arm assembly, and when the number of the holding clamps is more than two, the holding clamps are arranged at intervals in the length direction of the turnover arm assembly. The drilling tool is turned over from the horizontal state to the vertical state through the light and energy-saving concept, and then the function that the drilling tool of multiple specifications is lifted to the drill floor face on the site is achieved. Meanwhile, by means of flexible configuration and collaborative operation of the device and a power drill rod box or a drill rod frame, the requirements of drilling tools with different lengths for getting on and off a drill floor are met.