143 results about "Well control" patented technology

The invention relates to the field of petroleum well repair engineering, and particularly discloses a secondary well control automation system for conventional minor repair operation of an oil and gas field, which comprises the following steps of: firstly, performing time domain synchronization and Kalman filtering smoothing on multi-source sensor data, and constructing a high-precision synchronization data set; on the basis, the theoretical reference pressure value containing the excitation or swabbing effect is calculated in real time by utilizing the extracted tubular column instantaneous speed and operation modal characteristics and combining a fluid dynamic model. The core lies in that differential calculation is carried out on the theoretical value and actually measured pressure data, and pressure residual decoupling is achieved. The process can dynamically counteract normal physical fluctuation caused by tubular column tripping operation, and the reserved residual sequence is the pure stratum anomaly feature after interference stripping. And finally, a hierarchical control instruction is generated based on the residual sequence, so that the operation efficiency is guaranteed, and meanwhile, the real-time and accurate capture and automatic hierarchical disposal of the secondary well control risk are realized.

The invention belongs to the technical field of oil and gas drilling well control equipment, and particularly relates to a ram blowout preventer state confirmation method with a locking indication window, which comprises the following steps: arranging a transparent observation window on a blowout preventer shell, and calibrating the alignment position of the end face of a locking shaft and an inner side reference scribed line; after the locking action is executed, the alignment state is confirmed through multi-angle visual observation; a switchable auxiliary light source is integrated to eliminate visual interference; an industrial camera is used for collecting images, displacement deviation is recognized through an edge detection algorithm, and an alarm is given if the displacement deviation exceeds the limit; and generating an encrypted digital report containing a timestamp and equipment information, uploading the encrypted digital report to a monitoring platform, and supporting real-time check and electronic signature of a mobile terminal. Through three layers of mechanisms of standardized vision-mechanical mapping, optical enhancement and digital perception, high-reliability, high-compatibility and traceable locking state confirmation is realized.

The invention relates to the technical field of oil drilling and production well control equipment, in particular to a composite sealing rotary blowout preventer capable of regulating and controlling pressure while drilling. The blowout preventer comprises an execution module, a transmission module and a pressure sensing module. According to the execution module, radial extrusion force is applied to the rubber core through a radial shrinkage mechanism composed of a rotating ring, a connecting rod and a push block, meanwhile, a piston outer sleeve is matched with an inner shell in the axial direction under the limiting effect of an adaptive ring, axial compression force is applied to the rubber core, and therefore composite sealing of the rubber core is achieved. The transmission module drives a transmission gear to be meshed with a gear seat through a motor and drives a rotating ring to rotate, and power is transmitted to the radial contraction mechanism. The pressure sensing module is used for monitoring wellhead pressure in real time and actively triggering the generator to operate according to pressure changes, and self-adaptive adjustment of the sealing state is achieved. The device is suitable for the PCWD working condition, active sealing adjustment can be achieved based on wellhead pressure changes, the sealing reliability is improved in an axial and radial composite compression mode, and the device is particularly suitable for complex stratums, pressure fluctuation and continuous drilling scenes.

The invention provides a drilling fluid flow monitoring device and method suitable for a mud runway, relates to the field of petroleum drilling ground testing instruments, and solves the problem that an existing monitoring method is low in overflow prediction precision and cannot find overflow in time. The device comprises a flow measuring unit (1), and the left side and the right side of the flow measuring unit (1) are connected with a flow guide unit (2) and a flow blocking unit (4) through flange plates respectively. The upper part of the diversion unit (2) is connected with the video monitoring unit (3); the flow measuring unit (1) is an electromagnetic flowmeter and is used for measuring the outlet displacement; the flow guide unit (2) is used for guiding drilling fluid to flow to the flow meter; and the flow choking unit (4) is used for controlling stable flow of the drilling fluid. According to the drilling fluid flow monitoring device suitable for the mud runway, real-time accurate monitoring of the flow of a drilling fluid outlet can be achieved, then monitoring of overflow and leakage of the drilling fluid is achieved, and well control safety is ensured.

The invention provides an adsorption pressure return type blowout control method, which comprises the following steps: intervening when well control abnormity occurs at the beginning (such as overflow precursor), compounding a methane adsorbent and a conventional drilling fluid additive to prepare high-density composite well control fluid, and injecting the high-density composite well control fluid into a shaft by a special device at a position 100-200m below a wellhead according to preset displacement and pressure parameters. According to the method, bubbles in a shaft are adsorbed through an adsorbent, the slippage speed and the gas phase volume fraction are reduced, and the synergistic effect of static pressure constraint and active adsorption is achieved. Therefore, back pressure fluctuation can be stabilized in the early stage of gas cut, gas column expansion and pressure rising are limited, the risk of pressure leakage and secondary eruption is reduced, the purpose of preventing or restraining blowout is achieved, and the gas cut blowout prevention device is suitable for complex working conditions such as fractured stratums, deep water, high temperature and high pressure and narrow-density windows.

The application discloses a kind of prediction methods for determining recovery ratio of stratified gas reservoir under different well interference conditions, and belongs to the technical field of oil and gas field development.It includes collecting and arranging gas reservoir basic data;Establish well control area under different well interference, and, based on the existing production pressure difference condition gas reservoir waste gas pressure determination formula;Finally, consider the determination of stratified gas reservoir recovery ratio of well control area.The present application determines the accurate gas reservoir abandonment condition by definite integral principle under the maximum production pressure difference, overcomes the problem that gas reservoir abandonment pressure is difficult to obtain;And based on the existing well pattern condition, establish the determination method of gas reservoir recovery ratio, achieve the purpose of quickly and accurately obtaining gas reservoir recovery ratio.

The invention relates to the technical field of mining, in particular to a dual-purpose well control blowout prevention foundation pier for oil and gas wells, which comprises a foundation pier body, supporting bases are fixed at four corners of the bottom surface of the foundation pier body, a connecting plate is fixed on the bottom surface of the foundation pier body, and two hoop plates are mounted below two ends of the connecting plate. Two threaded rods are inserted into the two ends of the two hoop plates, the top ends of the threaded rods penetrate through the connecting plate, the top ends of the threaded rods are in threaded connection with threaded sleeves in a sleeving mode, the bottom ends of the threaded sleeves are fixed to the top face of the connecting plate, and a plurality of clamping blocks are inserted into the surfaces of the threaded sleeves; the device has the beneficial effects that the multiple clamping blocks are inserted into the surface of the screw sleeve, and the pushing rings are arranged to push the clamping blocks to clamp the screw rod. After the screw rod and the screw sleeve are screwed and locked, the push ring is screwed downwards, and the push ring pushes the clamping block to retract into the insertion hole along the inclined surface of the top surface of the clamping block, so that the rubber ring is tightly clamped on the surface of the screw rod by the clamping block, the friction force between the screw rod and the screw sleeve is increased, and the screw rod and the screw sleeve are effectively prevented from being loosened in the using process.

The application discloses a system and method for monitoring the operation state data of an ultra-high pressure blowout preventer control device, and relates to the technical field of well control in oil drilling and production. The application provides the following scheme: a large number of devices linked with the blowout preventer control device are comprehensively monitored under the ultra-high pressure working condition, and a monitoring system is designed to include multiple devices, multiple gateway nodes, multiple gateway subnodes and a cloud server. The devices are the devices linked with the blowout preventer control device for operation control. Each gateway node is previously associated with an edge network, the edge network is a local area network designed based on the components of the blowout preventer control device, and the edge network is designed to deploy multiple gateway subnodes in a tree structure. Each gateway subnode is an edge computing terminal carried by a remote console of the blowout preventer control device, and each gateway subnode is previously associated with at least one device. The monitoring system can upload the preprocessed data in each edge network to the cloud server.

The present application relates to a kind of determination methods of fracturing horizontal well controlled reserves, belong to oil and gas reservoir exploration and development technical field.The determination method of fracturing horizontal well controlled reserves of the present application, comprising the following steps: based on the length of horizontal section of fracturing horizontal well, the angle between horizontal section and maximum horizontal principal stress, limit drainage radius and the half fracture length of fracturing fracture, the area of the region surrounded by the maximum envelope line of fracturing horizontal well seepage field is calculated, and the control area of fracturing horizontal well is obtained;Based on the product of fracturing horizontal well control area, oil layer effective thickness and single storage coefficient, the control reserves of fracturing horizontal well is determined.The determination method of fracturing horizontal well controlled reserves of the present application simplifies single well control area into the maximum drainage area of single well that can control oil layer fluid seepage from the seepage angle, which can effectively simplify the calculation process and improve the calculation efficiency.

The anti-pollution device is arranged in a shaft and located between a lifting tubular column and an oil production stratum, the oil layer is separated from working liquid in well washing, paraffin removal and other measure operations on the upper portion of the device through a leather cup assembly, in an oil field producing well, the oil layer is effectively protected, and long-term stable production of the oil well is guaranteed; when the anti-pollution device needs to be moved out of the oil well, crude oil in the upper space of the leather cup assembly can be prevented from being splashed to the ground through oil unloading operation of the oil unloading mandrel, the environment is protected, and meanwhile the well control risk caused by the upward swabbing effect of the anti-pollution device is avoided.

The invention discloses a method for predicting the erosion rate of a control manifold of an offshore oil and gas exploration well. The method comprises the following steps: constructing a support vector machine model; wherein the input parameters of the support vector machine model are the manifold diameter, the manifold bending angle, the fluid speed, the fluid density and the fluid viscosity, and the output parameter of the support vector machine is the maximum erosion rate of the well control manifold; optimizing penalty function coefficients and kernel function parameters of the support vector machine model by adopting a genetic algorithm to obtain an optimized support vector machine model; training the optimized support vector machine model to obtain a well control manifold erosion rate prediction model; and acquiring the manifold diameter, manifold bending angle, fluid velocity, fluid density and fluid viscosity of the to-be-predicted well control manifold, and inputting into the well control manifold erosion rate prediction model to obtain the maximum erosion rate of the to-be-predicted well control manifold. According to the well control manifold erosion rate prediction method provided by the invention, the maximum erosion rate of the well control manifold can be accurately predicted.

The invention relates to a pipe retrieval arrangement (1a, 1b) with at least one pipe retrieval (2, 3), wherein the at least one pipe retrieval (2, 3) has a retrieval cylinder (4, 9) and a piston (5, 10), wherein the piston (5, 10) is connected to a piston rod (6, 11), wherein the piston (5, 10) and the retrieval cylinder (4, 9) define a pressure chamber (7, 12), wherein a gas (8) is arranged in the pressure chamber (7, 12), wherein the gas (8) is compressed in the pressure chamber (7, 12) during a pipe return and expands during a pipe advance. Better control of the retraction force is made possible by the provision of two pipe retractors (2, 3), namely a first pipe retractor (2) and a second pipe retractor (3), wherein the first pressure chamber (12) of the first pipe retractor (2) is connected to a first end (14) of a first line (13) and a second end (15) of the first line (13) is connected to a first pressure gauge (16), wherein the second pressure chamber (12) of the second pipe retractor (3) is connected to a first end (18) of a second line (17) and a second end (19) of the second line (17) is connected to a second pressure gauge (20).

The present application belongs to the technical field of ocean engineering equipment, and particularly relates to a kind of integrity design method of ocean oil and gas development well control equipment mechanical system. The integrity design method realizes the guarantee of the whole life cycle working reliability of the ocean oil and gas development well control equipment by constructing the integrity index factor of the ocean oil and gas development well control equipment mechanical system integrating multi-source information, and balances the working reliability of each component in the whole life cycle. The integrity design method of the ocean oil and gas development well control equipment mechanical system comprises the following steps: obtaining the performance parameters of the key components of the ocean oil and gas development well control equipment mechanical system; calculating the performance parameters of the overall structure of the ocean oil and gas development well control equipment mechanical system; determining the working condition environmental parameters of the ocean oil and gas development well control equipment; calculating the time-varying reliability of the ocean oil and gas development well control equipment mechanical system; constructing the integrity index factor of the ocean oil and gas development well control equipment mechanical system; and completing the integrity optimization design.

The invention belongs to the technical field of oil and gas equipment detection, and particularly relates to a well control device structure defect detection method based on dual-frequency electromagnetic excitation and a probe. According to the structural defect detection method and the probe, reflection-type electromagnetic detection signals and transmission-type electromagnetic detection signals with different frequencies are demodulated through dual-frequency electromagnetic excitation and phase locking, so that detection and identification of structural defects at different positions of the ocean well control device are realized. The well control device structure defect detection probe based on dual-frequency electromagnetic excitation comprises a probe shell, a first magnetic field sensor, a second magnetic field sensor, a first excitation coil, a second excitation coil, a first magnetic core and a second magnetic core, the probe shell is of a U-shaped structure, and a groove space is formed between a first supporting leg and a second supporting leg of the U-shaped structure; a first fixing groove is formed in the first supporting leg of the U-shaped structure, a second fixing groove is formed in the second supporting leg of the U-shaped structure, and the first fixing groove and the second fixing groove are symmetrically arranged.

A modular oil-control incense diffuser, comprises: a shell body with an fuel tank preset in the inner space, an atomization piece at the bottom of the oil tank, an universal oil control module with an universal connector at one end thereof for a commercial aromatic container connected each other, the other end thereof is configured with a combined oil control pipe correspondingly to extend into the fuel tank. A spring in the oil outlet pipe contacted an oil needle to reach the atomization piece, so as to provide precise oil control and atomization, the nozzle is connected to the atomizing piece to release the atomizing gas to outside of the shell body, to effectively control the dripping speed of essential oils, exert a regulating effect to well control the flow rate and atomization speed of essential oils, greatly improving the atomization efficiency while avoiding the waste of excessive dripping thereof.

This application discloses an integrated gas invasion control method that combines inhibition and absorption, applied to wellbores experiencing gas invasion. The method includes the following steps: constructing a composite slurry column system in the wellbore, comprising, from bottom to top, a gas-intake slug and a gas-enhancing slug; the gas-intake slug converts free gas into a solid-phase adsorbed state or a liquid-phase dissolved state by adding gas-intake material to the drilling fluid, thereby reducing the gas volume in situ within the wellbore; the gas-enhancing slug triggers viscosity enhancement when residual gas enters by adding a gas-responsive material to the drilling fluid, increasing fluid resistance and mitigating gas slippage. This application achieves a synergistic gas control effect through a segmented composite slurry column system, first reducing gas volume through absorption and then increasing viscosity and reducing gas flow rate, enabling early proactive intervention in gas invasion, avoiding fluid instability and gas channeling risks, and improving well control success rate.

This invention belongs to the field of overflow events, specifically relating to a hierarchical multi-joint learning-based method, system, and equipment for predicting well control overflow events. It aims to address the problems of equipment damage, production interruption, safety accidents, and environmental pollution caused by overflow event risks. The invention includes: training multiple well control overflow event prediction base models based on the training set; obtaining prediction results based on the test set; calculating the accuracy of the base models and selecting retained models to obtain a final feature set; integrating the retained models based on the final feature set to construct a voting-based ensemble model; and inputting the data to be predicted into the ensemble model to obtain the well control overflow event prediction result. This invention improves prediction accuracy and robustness by constructing an ensemble model, optimizes resource utilization, enhances operational safety and decision-making efficiency, effectively prevents well control overflow events, and ensures the safety and economic benefits of oilfield operations.

The invention provides a plugging material for an oil jacket annulus of a liquid carbon dioxide injection well and a preparation method and application thereof, the plugging material for the oil jacket annulus of the liquid carbon dioxide injection well is a mixture of C6-C60 alkane and asphalt, and the mixture comprises the following components in percentage by weight: 60-65 wt% of C6-C36 alkane, 25-30 wt% of C37-C60 alkane and 5-10 wt% of asphalt. The preparation method of the plugging material is simple, the cost is saved, the plugging material has a long-time effective plugging effect, the well control risk is reduced, and therefore the plugging material is suitable for large-scale production and has wide industrial application prospects.

The present application relates to a kind of well gas invasion and loss parameter inversion methods based on unscented Kalman filter, belong to petroleum engineering technical field, comprising: step 1: establish overflow wellbore multiphase flow model;Step 2: establish inversion model;Step 3: solve inversion model;Calculate the inversion result of downhole gas invasion and loss parameter.The application method combines wellbore multiphase flow equation with state space model, uses the nonlinear estimation characteristics of UKF algorithm, carries out dynamic filtering and state updating to wellhead measurable data, realizes the real-time inversion of downhole gas volume fraction, gas invasion flow and loss amount.UKF method can accurately capture the nonlinear characteristics of system without linearization, thereby improving the inversion accuracy and calculation stability under complex conditions.Through example verification, this method has good applicability under single reservoir, multiple reservoir and overflow and leakage coexistence conditions, provides reliable boundary conditions and intelligent control basis for well control system.

The present application relates to a kind of CO2 injection dynamic optimization method based on deep reinforcement learning and MRST reservoir numerical simulation coupling, belong to petroleum engineering intelligent optimization control technical field, to solve the serious dependence of artificial trial calculation in existing CO2 injection system optimization, dynamic decision-making ability is insufficient, physical simulation and intelligent decision-making are disjointed and safety constraint processing is insufficient and other problems.Through MRST, CO2 injection numerical simulation environment is established, state variables such as pressure field, CO2 saturation field, well control state, cumulative injection amount, storage amount index and constraint margin are constructed from simulation state, injection control action is output by deep reinforcement learning agent, MRST simulation is promoted after engineering constraint processing, reward is calculated and strategy is updated.The present application can be adjusted according to reservoir dynamic response Rolling injection strategy, applicable to CO2 geological storage and CO2 flooding and storage collaborative optimization scene.

This invention relates to the field of collaborative well testing technology for coal reservoirs, specifically disclosing a constant flow rate-limited pressure collaborative control method and system for coal reservoir well testing. The method includes: collecting cluster-single-well dual-dimensional parameters; constructing a regional reservoir pressure field coupling model based on the dual-dimensional parameters, wherein the regional reservoir pressure field coupling model embeds fluid-structure interaction equations and a pulverized coal critical velocity model; configuring a cluster-single-well dual-level priority dynamic allocation rule based on the dual-dimensional parameters; and configuring a cluster-level multi-objective optimization algorithm with single-well flow deviation, single-well pressure, regional pressure field uniformity, and cluster pulverized coal blockage risk as constraint indicators. This invention successfully resolves the contradiction between rapid pressure relief and prevention of pulverized coal explosions, minimizing reservoir damage and wellbore blockage risks while ensuring well control safety, and significantly improving the success rate and data quality of coalbed methane well cluster testing operations.

This invention relates to the field of oilfield well workover, and discloses an automatic well sealing switch device and well workover operation equipment. The automatic well sealing switch device includes a height adjustment mechanism, a rotation mechanism, a telescopic mechanism, and an automatic switching mechanism; the height adjustment mechanism includes an adjustment cylinder, an adjustment cylinder, and a support rod; the rotation mechanism is connected to the upper end of the adjustment cylinder; the telescopic mechanism is arranged laterally; the automatic switching mechanism includes a fixed outer sleeve, a lifting cylinder, a lifting outer sleeve, an outer cylinder, an outer cylinder end cap, a well sealing end cap, a guide rod, a suspension blowout preventer short connector, a variable-strut short connector, a lower section short connector, an upper spring sealing sleeve, an upper spring, a bearing, a short connector connecting sleeve, and a lower spring. This invention replaces the traditional rotary valve with an automatic well sealing switch device, achieving rapid well control and emergency blowout control in automated operations, ensuring operational safety; through the reasonable layout and coordinated actions of each mechanism, efficient automatic well sealing is achieved, saving manpower and time.

This invention relates to the field of offshore oil and gas extraction, providing a production well control method, system, equipment, and medium based on dual load values. The method includes acquiring initial production data of the production well; calculating the drainage height based on the initial production data, causing the production plunger to drop from its initial position, and collecting well environment data; calculating the gas column height and a well temperature correction value, correcting the gas column height using the well temperature correction value to obtain the target gas column height; acquiring the internal acceleration of the liquid, determining the liquid state based on the internal acceleration, and calculating the liquid depth; calculating distance judgment parameters based on the liquid depth and drainage height to control the expansion of the production plunger; collecting well shut-in production data, calculating a first load value, executing a well opening command based on the first load value, causing the production plunger to return to the initial position, collecting well opening production data, calculating a second load value, and executing a well shut-in command based on the second load value. This invention effectively improves the production output of production wells.

The invention provides a coal measure strata tight sandstone gas earthquake identification method and device, and relates to the technical field of earthquake gas reservoir prediction, and the method comprises the steps: carrying out the coal seam multiple suppression processing of the seismic data of a target work area, and obtaining the preprocessed seismic data; generalized S transformation is carried out on the preprocessed seismic data to obtain time-frequency spectrum data; extracting a plurality of gas layer sensitive time-frequency attributes from the time-frequency spectrum data; and performing multi-attribute well control fusion processing on the plurality of gas reservoir sensitive time-frequency attributes to obtain a gas reservoir sensitive factor, and based on the gas reservoir sensitive factor, generating an earthquake identification map for identifying the tight sandstone gas of the coal measure strata. According to the method, the data signal-to-noise ratio is increased by pressing coal bed interlayer multiples, multi-angle gas bed sensitive time-frequency attributes are extracted through high-resolution time-frequency analysis, a visual recognition map is generated through well control fusion, the problem that tight sandstone gas weakness response is difficult to recognize due to coal bed strong shielding is systematically solved, and the method has the advantages of being high in practicability and the like. And the identification precision and reliability are improved.

The invention discloses an intelligent intercepting well control method and system based on water quality on-line monitoring, and relates to the field of intelligent intercepting well control, after a rainfall event is identified, the system immediately extracts key features in the initial stage of rainfall, and matches the key features with a historical event database, so as to quickly predict a complete pollution process curve of the rainfall event. And then, dynamically correcting the prediction curve by using water quality monitoring data obtained in real time. Based on the corrected curve capable of predicting future pollution change, the system can predict the arrival time and intensity of a pollution peak value in advance, and a prospective optimal control strategy is generated according to the arrival time and intensity of the pollution peak value. In this way, a control instruction can be issued in advance, sufficient time is reserved for response of actuators such as a gate, it is ensured that the closure action is completed before the pollution peak value reaches the closure opening, and therefore system delay is effectively overcome, and accurate capture of initial high-concentration rainwater is achieved.

This invention relates to the field of oil and gas well drilling technology, and discloses a method for reducing the bottom hole drilling fluid circulation temperature, S1, determining the minimum drilling fluid density ρ that satisfies wellbore stability. min And the drilling fluid upper limit density ρ that meets well control requirements max S2. Determine the drilling fluid system based on the formation lithology; S3. Combine the drilling fluids that satisfy steps S1 and S2 according to their density difference x g / cm³. 3 Divided into multiple density gradients; S4, from the upper limit density ρ of the drilling fluid max Start drilling and record the circulating temperature of the drilling fluid at the bottom of the well; S5, determine whether the circulating temperature is within the specified range. If the circulating temperature is higher than the specified range, gradually reduce the upper limit density ρ of the drilling fluid according to the density gradient of the drilling fluid. m This invention also discloses a drilling fluid system for reducing the bottom hole drilling fluid circulation temperature until the bottom hole drilling fluid circulation temperature reaches a specified range. This invention discloses a novel method for reducing the bottom hole drilling fluid circulation temperature.

The utility model relates to the technical field of throttling well killing manifolds, in particular to a novel throttling well killing manifold device which comprises a blowout preventer connected with a well mouth, and a first flange connected with the two ends of the blowout preventer is connected with a second flange through bolts. The flange has the beneficial effects that when the first flange and the second flange need to be connected, the first flange and the second flange can be in threaded connection only through quick positioning, when the first flange and the second flange are in butt joint and butt joint is not successful, whether the convex hull on the second flange is in the sliding groove or not is observed, and if the convex hull is in the sliding groove, the distance between the first flange and the second flange is shortened, the flange can be connected. At the same time, when the first flange and the second flange are in threaded connection, the sealing gasket embedded in the second flange can be pressed into the clamping groove to achieve sealing, the sealing gasket is located on the outer side of the convex hull and the outer side of the sliding groove, and therefore the sealing effect of the first flange and the second flange is improved. And the sealing gasket is difficult to slide off due to the blocking of the convex hulls.

The invention belongs to the technical field of blowout preventer tests for deep wells and ultra-deep wells, and discloses a differential well control dynamic pressure performance test device and test method. The differential type well control dynamic pressure performance testing device comprises a simulation shaft, a tripping hydraulic cylinder and a hydraulic control module, the bottom end of the simulation shaft is fixed underground, the top end of the simulation shaft is connected with a blowout preventer through a wellhead four-way joint, and a simulation drill rod is arranged in the blowout preventer in a penetrating mode; the tripping hydraulic cylinder is arranged on the lifting frame and located above the blowout preventer, and a piston rod of the tripping hydraulic cylinder is connected with the simulation drill rod; and the hydraulic control module is connected with the tripping hydraulic cylinder through a hydraulic pipeline, has a differential control mode and can perform differential control on the tripping hydraulic cylinder. The reciprocating motion speed of the piston rod of the tripping hydraulic cylinder can be increased, meanwhile, the reciprocating lifting speed of the simulation drill rod in the blowout preventer is increased, the contradiction that the required liquid amount of the tripping hydraulic cylinder is large and the flow of a hydraulic control module is small is solved, and the average speed of the piston rod can be increased to 1.5 times.

The utility model provides a tapping and drilling all-in-one machine with an adjustable tapping and drilling head, and belongs to the technical field of machine tools. The drilling and tapping all-in-one machine solves the problem that an existing drilling and tapping all-in-one machine cannot be well controlled to carry out precise machining on products. The tapping and drilling all-in-one machine with the adjustable tapping drill bit comprises a machine body base, a machine body frame is arranged on the machine body base, the tapping drill bit used for machining is arranged on the machine body frame, the tapping drill bit is movably arranged on the machine body frame through a mechanical arm, an adjusting mechanism for adjusting the position of the tapping drill bit is arranged on the machine body base, and the adjusting mechanism comprises a positioning seat, an adjusting rod and a clamping assembly. The adjusting rod is arranged on the positioning seat, a plurality of racks matched with the clamping assembly are arranged on the adjusting rod, the clamping assembly is composed of a clamping head, a rotating shaft and a rotating disc, the front end of the clamping head is arranged on the tapping drill bit and used for clamping the tapping drill bit, a mounting groove is formed in the rear end of the clamping head, and a gear is arranged in the mounting groove. The utility model has the advantage of improving the processing efficiency.

The application discloses a well control velocity modeling method based on structure guidance and application thereof, and belongs to the technical field of seismic data processing in oil exploration. The application utilizes logging, VSP velocity and seismic velocity analysis, establishes a space variable factor field based on structure guidance, further uses the space variable factor field to constrain a multi-azimuth grid tomography residual velocity field, optimizes velocity update quantity, completes multi-azimuth grid tomography multi-round iteration of the well control velocity field based on structure guidance, and obtains the well control velocity model based on structure guidance. The well control velocity model obtained by using the modeling method provided by the application can consider the longitudinal resolution and the lateral change law of the velocity field, ensures that the updated velocity field is consistent with the well velocity, and the velocity change trend is also consistent with the seismic geology. The application can be used for establishing a high-precision velocity field and a Q field and for "true" surface TTI prestack depth migration, and is further applied to the fields of prestack inversion and calculation of geomechanical parameters.