2741 results about "Wellhead" patented technology

The invention relates to the technical field of pressure detection, in particular to an oil well pressure anomaly detection method and system based on deep learning, and the method comprises the following steps: collecting a control signal and pressure data, calculating a slope difference and fluctuation to mark a sudden change point, extracting a multi-dimensional feature group to generate a training sample, and constructing a deep learning model to recognize pressure difference anomaly. The oil well pressure abnormal time period is predicted in real time. According to the method, accurate attribution of abnormal fluctuations in the oil well operation process is achieved by constructing the time sequence corresponding relation between control signals and pressure difference sudden change, the target pertinence of pressure change recognition is improved, a sliding structure extracts multi-dimensional dynamic characteristics, the capacity of capturing wellhead or underground pressure micro-amplitude abnormity is enhanced, and the training sample is combined with a control behavior label, so that the accuracy of the abnormal fluctuations in the oil well operation process is improved. The distinguishing capability of the model to different abnormal forms is optimized, the adaptability under complex working conditions is improved, a real-time prediction mechanism ensures that oil well pressure state recognition has continuity, rapidness and high confidence, and risk early warning and operation guarantee in the oil extraction process are effectively supported.

The invention relates to an abandoned mine methane source detection-monitoring-analysis method and system based on air-ground cooperation, and belongs to the technical field of coal mine safety monitoring. The method comprises the following steps: carrying a high-sensitivity CH4 detection device and a camera by an unmanned aerial vehicle, carrying out aerial inspection according to a route, and carrying out source detection and inspection on methane distribution around the abandoned mine by returning three-dimensional concentration; the method comprises the following steps: deploying holder laser telemetering equipment and meteorological sensors in a wellhead, a fracture dense area and an air flow path, and transmitting monitoring data through LoRa / ZigBee; the method comprises the following steps: fusing air-ground data, constructing a methane concentration gradient field and a diffusion model, and predicting a leakage trend while performing large-range and continuous monitoring in combination with geological and meteorological data; and the system triggers multi-stage early warning and automatically starts emergency response. According to the invention, all-directional and high-precision monitoring of CH4 in the abandoned mine is realized, the leakage source positioning error is less than 5m, the response efficiency is improved, the operation and maintenance cost is reduced, the explosion and environmental pollution risks are effectively prevented and controlled, and the safety management level of the abandoned mine is improved.

The invention relates to the technical field of underground gas production, and discloses a metal sealing gas production wellhead device which comprises a body. A housing; the filtering assembly is used for circularly filtering gas in the wellhead; the self-discharging assembly is used for automatically discharging impurity particles attached to the filtering assembly; the filtering assembly comprises a screening device and an indexing rotating device; and the screening device is used for filtering gas impurities in the well. According to the metal sealing gas production wellhead device, drum-type double-layer filtering can be achieved through the arranged filtering assembly, so that it can be guaranteed that impurity particles in mined gas can be greatly filtered out, and the purity of the extracted gas is guaranteed. And the indexing rotation of the circular filter cartridge can be controlled by utilizing the indexing rotation device, so that the gradually blocked circular filter cartridge can be rotated, and clean filter holes face the underground again, and therefore, circulating automatic anti-blocking screening is carried out, and the operation stability of the gas production wellhead device is ensured.

A water injection regulation system for water injection well has a float limiting device (A) provided at a wellhead configured to release and capture a float; a ground water delivery device (B) having an outlet in communication with the float limiting device (A), and is configured to inject water into well through the float limiting device (A); and a plurality of downhole water distribution devices, each arranged in a target layer and outside a sidewall of a water-injection string, and configured to monitor production data of the target layer. The float is configured to receive a water distribution instruction to regulate water distribution of each downhole water distribution device, enter the water-injection string (11) with water flow, and float upwards to the wellhead after completing data collection. Each downhole water distribution device is configured to exchange the production data with the water distribution instruction carried by the float.

The invention relates to the technical field of mine safety, and discloses a mine extreme weather emergency defense and up-and-down pre-alarm system, which comprises a ground surface monitoring module used for monitoring the water level, rainfall and environment humidity of a mine wellhead and a ground surface low-lying area in real time and generating a dynamic water level pre-alarm signal; the wellhead flood control module comprises an automatic emergency flood control door and is used for receiving the early warning signal of the earth surface monitoring module and automatically closing the flood control door when the water level reaches a warning line so as to prevent surface accumulated water from flowing backwards to the underground; and the underground early warning and evacuation module comprises a sound-light alarm device and a wireless communication system. By adopting the technical scheme of multi-sensor fusion and water level trend prediction, through multi-dimensional real-time monitoring of the wellhead water level, the rainfall intensity and the environment humidity, the pre-closing state of the flood gate is triggered in advance in combination with dynamic data analysis and an intelligent algorithm, and the technical effects of timely responding to rapid rising of the water level and reducing the operation pressure of equipment are achieved.

The invention belongs to a monitoring method, and provides a real-time monitoring method for the amount of liquid accumulated in an oil pipe of a natural gas well and a related device aiming at the technical problems that whether accurate prediction is carried out or not cannot be judged and dynamic changes cannot be monitored in real time in two methods for judging the state of the liquid accumulated in the gas well at present. The method comprises the following steps: acquiring instantaneous wellhead oil pressure, instantaneous wellhead temperature, instantaneous gas production rate and instantaneous water production rate of a natural gas wellhead in real time, and then respectively determining a gas well water-gas ratio, natural gas phase real density, natural gas real kinematic viscosity, natural gas phase real flow rate, natural gas phase Reynolds number and non-dimensional liquid accumulation amount in an oil pipe; and obtaining the actual liquid phase content according to the non-dimensional liquid accumulation amount in the oil pipe, the diameter of the oil pipe and the depth of the oil pipe. Production structure parameters such as instantaneous gas production, instantaneous water production, instantaneous wellhead oil pressure, instantaneous wellhead temperature and the like which are easy to obtain on site can be directly utilized to obtain a liquid accumulation amount evolution dynamic curve of the gas well in the continuous production process.

The invention belongs to the technical field of petroleum machinery, and particularly relates to a combined type polish rod breakage blowout prevention wellhead device which comprises a valve body, a horizontally symmetrical penetrating cavity is formed in the valve body, the two ends of the cavity are blocked and fixed through glands, and a vertically-penetrating annular channel is further formed in the valve body and allows an oil pumping polish rod to pass through. Two gate plates are further symmetrically arranged in the valve body corresponding to the horizontally-symmetrical penetrating cavity, a rib plate is arranged on one side of the cover plate, and a right-angle rubber base is fixedly connected between the gate plates and the rib plate through bolts. The device can be automatically triggered after the oil pumping polish rod is broken and disengaged, a blowout channel is rapidly sealed, oil well back pressure spraying is prevented, environment pollution caused by crude oil spraying is avoided, and the device has the function of guaranteeing sealing between a wellhead device and the oil pumping polish rod during normal production of a rod-pumped well. And the wellhead device can be isolated from the shaft when the packing is maintained and replaced by the oil extraction system of the pumping unit.

The derrick type continuous oil pipe integrated sidetrack drilling operation device is provided with a base, a derrick, an injection head installation support, an injection head, a lifting oil cylinder, a hydraulic clamp and a remote operation room, one side of the derrick is fully opened, the derrick and the base are both of a lightweight rigid structure, and the injection head is installed at the top of the derrick for remote control. After the base is arranged at a wellhead and is unfolded and installed, one side of the base is connected with the lifting oil cylinder, the other side of the base is in butt joint with the ramp and the pipe rack, the derrick is rapidly erected through the lifting oil cylinder, and after the injection head is hoisted to the top of the derrick, the injection head is rapidly installed and subjected to alignment adjustment through the injection head installation support and the adjusting structure. Meanwhile, the tool rod and the elevator are arranged at the injection head, the tool rod is pulled and placed through the injection head, an oil pipe column and a sucker rod can be independently lifted or lowered, the oil pipe column and the sucker rod are pushed into a ramp from one side of an opening of a derrick, integrated sidetrack drilling operation of the coiled tubing is achieved, and sidetrack drilling efficiency and operation safety of the coiled tubing are remarkably improved.

The invention provides a method, medium and system for calculating the extension length of a hydraulic fracturing main fracture, and belongs to the technical field of hydraulic fracturing. The method, medium and system for calculating the extension length of the hydraulic fracturing main fracture comprise the steps that a water hammer wave signal at the position of a well mouth after hydraulic fracturing pump stopping is obtained; performing cepstrum analysis on the water hammer wave signal; the minimum period of the positive pulse extreme point of the complex cepstrum curve is calculated, and the time of the water hammer wave moving from a wellhead to a bridge plug is obtained; calculating the average speed of movement of the water hammer waves in the well; performing linear trend removal processing on the local signal of the water hammer wave; fourier transform is carried out on the local signal after linear trend removal processing, and a water hammer wave local signal frequency spectrum is obtained; extracting a fundamental frequency corresponding to a maximum value point in the water hammer wave local signal spectrum as a response frequency in the main crack; according to the response frequency in the main fracture, the propagation time of the water hammer wave in the main fracture is calculated; and calculating the extension length of the main crack.

A subsea wellbore monitoring system of the present disclosure includes hanger, plug, and monitoring assemblies. The hanger assembly installs on landing in the wellhead, engages the lock profile, and has a hanger seal sealing in the wellhead. The plug assembly is supported in the hanger assembly and has a plug seal to seal in the landing. Ports of the plug assembly communicate with a bore envelope and an annulus envelope. The monitoring assembly has pressure monitors that communicate with the ports and measure pressure measurements related to the envelopes. The hanger and plug seals can be elastomeric and / or metal elements. The hanger and plug seals are preferably expandable or can be energized outward so the seals can pass any shoulders and profiles when installed in the wellbore and can then seal against the internal surfaces.

The invention belongs to the technical field of overflow monitoring and judgment in the petroleum and natural gas drilling process, and discloses an overflow monitoring device and method based on a shaft multiphase flow flowing rule. A simulation switch connected with an overflow simulation device is arranged at the bottom of a simulation shaft, and gas invasion, water invasion and oil invasion can be simulated respectively; electromagnetic flow meters are installed on a wellhead drilling fluid injection manifold and a wellhead drilling fluid return manifold respectively, a liquid level pressure sensor is installed in a mud pit, dynamic change data of the electromagnetic flow meters and the liquid level pressure sensor are monitored and obtained in real time through a monitoring machine and stored, analyzed and processed in real time, and characteristic parameters of different types of overflow are determined. And on the basis, overflow monitoring and judgment are carried out, and theoretical support and guidance are provided for field well control operation. The whole device disclosed by the invention does not monitor underground, does not need expensive hardware equipment, is low in investment and operation and maintenance cost, is not limited by underground complex environmental factors, and can avoid signal transmission power loss and improve the monitoring effect.

The invention relates to a gas well annulus gas leakage monitoring method and system. The method comprises the steps that the casing side pressure of an initial leakage point is determined; determining the gas leakage flow of the leakage point; determining a time step length required for generating a single bubble under the gas leakage flow; sampling by taking the time step length as a time interval, and obtaining a gas column volume and a liquid column volume in the annulus protection liquid in the current time step length; determining a target wellhead oil sleeve annulus pressure; the casing side pressure of the target leakage point is determined; if the casing side pressure of the target leakage point is smaller than the pressure in the pipe column at the leakage point, the gas column volume and the liquid column volume are updated and serve as the gas column volume and the liquid column volume of the next time step respectively; and the casing side pressure of the target leakage point is repeatedly obtained till the casing side pressure of the target leakage point is larger than or equal to the pressure in the pipe column at the leakage point, and it is determined that gas leakage in the gas well annulus is stopped. The problem that the leakage point casing side pressure detection result error is large due to the fact that the migration process of leaked gas in a liquid column section is ignored in the detection process is solved.

The invention discloses a wellhead valve capable of taking out impurities in a pipeline for oil exploitation, relates to the field of oil exploitation, and solves the problems that when an existing wellhead valve for oil exploitation is used, the impurities in a filter screen are difficult to be self-cleaned in the process of screening and filtering the impurities in the pipeline, and the service life of equipment is short. Comprising a shell, a filtering mechanism, a cleaning mechanism and a switching mechanism, the side face of the shell communicates with an input pipe and an output pipe, the filtering mechanism comprises a rotating shaft and a filtering plate, multiple sets of screen holes are evenly formed in the filtering plate, and the cleaning mechanism comprises a cleaning rod. Impurities on the two sets of filter plates are synchronously removed through the cleaning rod, when one sides of the filter plates are cleaned through the cleaning rod, the directions of the filter plates are switched through linkage of the switching mechanism, small-particle impurities which are not cleaned in sieve holes are pushed to one side of the output pipe through flowing of petroleum to be discharged, and the self-cleaning function of the filter plates is achieved.

The invention belongs to the field of petroleum and natural gas drilling engineering, and particularly relates to an ocean fine pressure control drilling inspection device and method. A wellhead monitoring device is used for monitoring locking information of a hoop of an annular blowout preventer; the drill floor monitoring device is used for monitoring the coupling information of the drilling tool; the gas cut monitoring device is used for monitoring gas cut information in the well pipe; the pressure monitoring and automatic control system state monitoring device is used for monitoring valve information of the wellhead device; and the remote control center is used for receiving information sent by the wellhead monitoring device, the drill floor monitoring device, the gas cut monitoring device and the pressure monitoring and automatic control system state monitoring device. According to the invention, state monitoring of different processes such as a drill floor surface, a well mouth, a gas cut state, pressure monitoring and an automatic control system is realized, information interaction with a fine pressure control well drilling control center can be realized, whole-process monitoring of an equipment operation process is guaranteed, safety of a fine pressure control well drilling operation process is guaranteed, and labor force is saved.

The present application belongs to the field of production safety technology, and specifically provides a wellhead safety protection device, including a guardrail and a first cover plate, wherein the guardrail is a foldable frame structure, and the guardrail is erected around the wellhead; the first cover plate is installed on the side of the guardrail, and the first cover plate is used to cover the wellhead. The wellhead safety protection device provided by the present application not only meets the requirements for the inspection, maintenance and access functions of the lower facilities of the belt conveyor corridor, but also completely solves the potential safety hazards caused by the failure to cover the wellhead cover in time; the present application designs the first cover plate and the guardrail as a linkage device with an integrated structure, which has a compact structure and is easy to retract and fold. When the first cover plate is opened, the guardrail is unfolded at the same time to form a fence around the wellhead, which also plays a role in safety protection; when the guardrail is folded down, the first cover plate can move downward together with it to close and cover the wellhead, which is simple and convenient to operate, thereby improving the convenience of operation.

The invention belongs to the technical field of gas production wellhead devices, and particularly relates to a sulfur-resistant and carbon dioxide-resistant gas injection and production wellhead device which comprises an injection and production four-way assembly, a crossover flange assembly and a desanding assembly. The desanding assembly comprises a first pipe body, a second pipe body, a treatment box, a desanding barrel, one end of the desanding barrel, an inner spiral piece, a spiral groove, an air cylinder and an internally-tangent spiral blade. When the air pressure of the natural gas is reduced, the air cylinder pushes the internally-tangent spiral blade downwards through the bearing, the internally-tangent spiral blade rotates along the spiral groove in the downward pushing process, the path of the natural gas passing through the inner spiral blade is reduced, the centrifugal force of the natural gas is increased along with increase, and gravel in the natural gas can be thrown out of the sand removing barrel. Due to the fact that the pressure of the natural gas is reduced, a vortex-shaped gas column is formed on the shaft portion of the desanding cylinder and begins to diffuse, when the natural gas passes through the internally-tangent spiral blade, the internally-tangent spiral blade can guide the diffused gas column, the diffused gas column is gathered towards the shaft portion of the desanding cylinder again, the stability of the gas column is improved, and the influence of the gas column on gravel is reduced.

The invention relates to the technical field of sensor calibration, in particular to a multi-type sensor calibration detection method and system. The method comprises the following steps: a plurality of high-temperature acceleration sensors to be calibrated, high-temperature directional sensors and high-temperature vibration sensors are integrated and installed in a logging-while-drilling high-temperature environment chamber corresponding to high-temperature, high-pressure and strong-vibration simulation functions, and zero-position output static calibration is carried out; obtaining a multi-type zero drift static calibration sensor; corresponding temperature, pressure and vibration frequency constraint condition ranges from a well mouth to a well bottom are designed through simulation of a well logging-while-drilling high-temperature environment chamber, dynamic simulation calibration and calibration are carried out, and multiple types of dynamic calibration and calibration sensors are generated; a well logging-while-drilling high-temperature environment chamber is used for simulating corresponding downhole instant strong impact interference constraints and temperature shock interference constraints and carrying out sensing detection verification optimization, and multi-type calibration verification optimization sensors are generated. According to the invention, high-precision calibration and detection of the logging-while-drilling high-temperature sensor can be realized.

A natural gas hydrate in-situ drilling and drilling fluid treatment system, comprising an offshore control platform (16), a natural gas hydrate subsea in-situ drilling device, a disassembly and assembly servo system, a drilling fluid feeding system, a wellhead flowback drilling fluid treatment system, a hydrate decomposition gas treatment system, a wellhead flowback drilling fluid tailings treatment system, a buoyancy control system (15), and a main control electric-power communication support system (17) connected to each system and controlling same, wherein the natural gas hydrate subsea in-situ drilling device and the drilling fluid feeding system are separately detachably connected to the wellhead flowback drilling fluid treatment system; and the hydrate decomposition gas treatment system is separately connected to the wellhead flowback drilling fluid treatment system, the natural gas hydrate subsea in-situ drilling device and the drilling fluid feeding system. Using unattended automation technology realizes the operation of the natural gas hydrate in-situ drilling and drilling fluid treatment system, such that the production process is simplified, automation and modularization are achieved, and subsea in-situ drilling can be performed on a large scale, thus greatly reducing the operation costs.

The invention particularly relates to the technical field of multi-source data fusion, and discloses an intelligent deformation monitoring system for a well drilling wellhead rising short section flange, which comprises a multi-source data acquisition module, a data fusion processing module, an intelligent deformation analysis module, a digital twin modeling module, a risk grading early warning module and a man-machine interaction feedback module, a flange deformation associated data set is obtained through a multi-source data acquisition module, a multi-dimensional fusion feature set is constructed through a data fusion processing module, a flange deformation abnormal index is calculated in real time through an intelligent deformation analysis module, a three-dimensional model of a rising short section flange is constructed through a digital twin modeling module, and a three-dimensional model of the rising short section flange is obtained. A grading early warning strategy is formulated through the risk grading early warning module, monitoring data, an early warning signal and a three-dimensional model are displayed in real time through the man-machine interaction feedback module, and an operation interface is provided; all-directional data acquisition of flange deformation and associated environments is realized, the comprehensiveness of data monitoring is improved, the accuracy of deformation monitoring is improved, and the decision-making efficiency is improved.

The present disclosure relates to a method for evaluating a temporary plugging effect of fracturing in a low-permeability oil-gas reservoir based on monitoring pressure. The method comprises: calculating a wellbore friction resistance along a way from a wellhead to a target fracturing segment; calculating, based on a wellhead pressure monitored at the wellhead in real time, a wellbore pressure at the target fracturing segment; calculating a fluid pressure at a crack opening of each perforation cluster; calculating a perforation friction resistance coefficient of each perforation cluster; calculating a fracturing fluid instantaneous displacement of each perforation cluster; calculating, based on the fracturing fluid instantaneous displacement of each perforation cluster, a variation coefficient of a fracturing fluid displacement distribution after a fracturing construction is completed; and evaluating the temporary plugging effect of fracturing based on the variation coefficient.

The invention belongs to the technical field of well logging monitoring, and discloses a long-term monitoring device in a marine scientific drilling well and a laying method.The device comprises a wellhead reentry cone sleeve system and a monitoring system, the wellhead reentry cone sleeve system abuts against the seabed mud surface, and the monitoring system is arranged on the wellhead reentry cone sleeve system in a penetrating mode and extends into a drilling well; the in-well monitoring unit comprises a casing pipe, a packing pipeline, a stratum monitoring structure and a geological monitoring structure, the casing pipe is arranged in a drilling well in a penetrating mode, the packing pipeline is arranged on the outer side of the casing pipe in a sleeving mode, a plurality of packers are arranged on the packing pipeline at intervals in the vertical direction in a sleeving mode, and the packers have an expanded packing state and an unexpanded contraction state. In the packing state, the packers abut against the inner wall of a drilling well, and a packing space is defined by every two adjacent packers and the inner wall of the drilling well; a monitoring assembly is arranged in each packing space, the monitoring assemblies can monitor the temperature and pressure in the corresponding packing space and sample fluid in the corresponding packing space, and long-term in-situ monitoring of multiple stratums is achieved.

The invention discloses an automatic oil pipe transfer system and method, and belongs to the technical field of oil automation under-pressure workover pipe column transfer, the system comprises a pipe bin, a storing and taking manipulator, a variable-amplitude arm, a lifting manipulator and a control system, and the pipe bin, the storing and taking manipulator, the variable-amplitude arm and the lifting manipulator are all connected with the control system. Supporting legs of the pipe bin are adjusted, so that the oil pipe column can roll to a pipe column baffle; the control system starts a lifting mechanism of the storing and taking manipulator, and the oil pipe column is transferred between the pipe bin and the variable-amplitude arm; the variable-amplitude arm is converted from a horizontal state to a vertical state under the driving of the displacement device, the variable-amplitude arm and a second manipulator of the lifting manipulator are connected with an oil pipe string, the lifting manipulator is vertically lifted to a preset position under the driving of the lifting mechanism, and the lifting manipulator is driven by the horizontal rotation driving mechanism to complete horizontal rotation and transfer the oil pipe string to a wellhead; according to the invention, operators can be liberated from a high-altitude operation platform, the safety risk in the operation process is reduced, and the operation accuracy is improved.

The invention relates to the technical field of oil field workover treatment, in particular to a rapid blowout wrecking device and method for minor repair operation. According to the technical scheme, a lifting mechanism is installed on workover treatment equipment through a fixing mechanism, a rotary speed reducer is installed at the upper end of the lifting mechanism, a blowout wrecking rotating arm is installed on the upper portion of the rotary speed reducer, the outer end of the blowout wrecking rotating arm is fixedly connected with a fixing base, a turbine is installed in the fixing base, and a rotating short section is installed in the center of the turbine. The lower end of the rotary short section is movably connected with a full-bore plug valve; the worm is installed on one side of the turbine, the worm is driven by the hydraulic cycloid motor to rotate, the worm drives the turbine and the rotary short section to rotate, then the full-bore plug valve is driven to be rotationally connected to an oil pipe of a wellhead, then the switch knob is closed, and blowout wrecking is completed. The full-bore plug valve is installed through mechanical rotation, the follow-up loading function is achieved, potential safety hazards caused by manual installation of the full-bore plug valve are avoided, and rapid blowout wrecking work of blowout is achieved.

The invention relates to the technical field of oil extraction well mouths, and discloses a full-sealed leakproof oil extraction well mouth which comprises a pipe valve, an oil pipe fitting is installed below the pipe valve, the bottom of the oil pipe fitting is connected with a sleeve pipe fitting, and a sealing assembly is arranged on the oil pipe fitting; the sealing assembly comprises a flow channel sealing device, an inflation sealing device and a filtering device. According to the full-sealed leakproof oil extraction wellhead, liquid can be provided through the arranged flow channel sealing device to surround and seal the joints of a Christmas tree, tureen type sealing with the principle similar to that of a pickled Chinese cabbage jar is arranged, absolute sealing of the inner layer and the outer layer is guaranteed, the liquid surrounds the peripheral joints of all components of the pipe valve, and then the liquid is solidified along with the room temperature; the curing sealing layer is generated, integral sealing of oil and gas is achieved, a good sealing effect can be provided for an oil way through the sealing mode, and the situation that the sealing effect is reduced along with limitation of using time is avoided.

The invention relates to the technical field of oil and gas drilling, in particular to a drill rod transfer system and method for an ocean platform. The drill rod transferring system comprises a drill rod conveying device, a drill rod transferring device and a traveling hoisting assembly, the drill rod transferring device is arranged on one side of the drill floor face, the traveling hoisting assembly is installed on the drill floor face through a derrick, the drill rod conveying device is arranged above a pipe column storage yard, and therefore the position of the pipe storage yard does not need to be occupied, more drill rods can be placed in the pipe storage yard, and the construction efficiency is improved. Therefore, continuity and efficiency of drilling operation are improved. The drill rod conveying device can grab drill rods in a pipe column storage yard and reciprocate in front of the pipe column storage yard and the drill floor face, the drill rod conveying device is used for cleaning and buckling the drill rods, overturning and lifting the drill rods to be in a vertical state after oil coating, and the drill rod transferring device is used for grabbing the drill rods in the vertical state in the drill rod conveying device and transferring the drill rods to a well opening or a mouse hole. And therefore, the drill rod can be transferred from the pipe storage yard to the drill floor surface.

The invention provides a shale oil well pressure recovery well test interpretation method and device and electronic equipment.The method comprises the steps that effective well shut-in pressure test data and well entering time of a pressure gauge are obtained, the effective well shut-in pressure test data are well bottom pressure data after well shut-in and after the pressure gauge is lowered to the target test depth away from a well opening, and the well entering time is obtained; the well entering time is the time required for lowering the pressure gauge to a target test depth from a well mouth after the well is closed; obtaining well shut-in starting time and a pressure gradient in a well entering process of the pressure gauge; according to the pressure gradient, fluid pressure data at the well shut-in starting time and the target test depth from the well mouth are calculated to serve as supplementary pressure data; according to the effective shut-in pressure test data, the well entering time and the supplementary pressure data, a complete pressure recovery well test curve is determined; and on the basis of the complete pressure recovery well test curve, pressure recovery well test interpretation is carried out. According to the method, the problem of data missing in the early stage of well shut-in testing can be solved, the integrity of a pressure recovery well testing curve is guaranteed, and the accuracy of pressure recovery well testing interpretation is improved.

The sucker rod wellhead polish rod sealing structure comprises a sealing box arranged on a sucker rod wellhead polish rod in a sleeving mode, the upper end and the lower end of the sealing box are open, the lower end of the sealing box is fixed to the upper end of a wellhead pipe, a gland is arranged at the upper end of the sealing box, a connecting pipe is arranged in the middle of the sealing box, and the connecting pipe is communicated with an inner cavity of the sealing box. The upper end and the lower end of an inner cavity of the sealing box are each provided with a sealing packing, and a containing cavity is formed between the interval space and the inner wall of the sealing box. A detachable reducer union is arranged at the outer end of the connecting pipe, and a detachable sealing cock is further arranged on the outer wall of the connecting pipe. According to the combined sealing structure, when sealing fails, sealant can be injected into the containing cavity through the sealant injection gun, the damaged combined sealing structure is repaired, shutdown is not needed, disassembly is not needed either, repairing is rapid, and the oil extraction efficiency is improved; meanwhile, a glue injection gun is used for glue injection repair, and operation is convenient. The combined sealing structure can be repeatedly used, and the service life is long.

The invention relates to the technical field of fracturing well mouths, and discloses a porous injection fracturing head for fracturing well mouth equipment and a using method thereof.The porous injection fracturing head comprises a fixing frame, a conveying pipe is fixedly connected to the bottom of the fixing frame, a containing groove is formed in the inner wall of the conveying pipe, and an external solution is conveyed into the conveying pipe through a water inlet pipe; when natural gas expands, water flow in the output pipe moves upwards along the output pipe under thrust and returns to the interior of the conveying pipe again, at the moment, backflow liquid makes contact with the first flow dividing block and the second flow dividing block again, the liquid is subjected to flow dividing under the influence of the first flow dividing block, the second flow dividing block and the appearance, and therefore the natural gas expands. According to the water pump, split water flows along the outer walls of the second arc-shaped grooves and the first arc-shaped grooves, when two different water flows interact, most impact force is offset, backflow water impacts each other in the conveying pipe, and when the water flows pass through the first split-flow blocks and the second split-flow blocks, the influence of the impact force on the water pump is effectively weakened.

The invention discloses an automatic oil pipe feeding and positioning system and an integrated workover rig, and mainly relates to the field of workover equipment. Comprising a second-order feeding module, the second-order feeding module comprises a supporting stand column with a lifting stroke, a supporting rod with a lifting stroke is installed on the supporting stand column, a groove frame horizontally extending in the length direction of the well repair vehicle is arranged at the top end of the supporting stand column, and the groove frame has a horizontal follow-up stroke in the length direction of the groove frame; the hoisting module comprises a mast stand column installed on one side of the derrick, and an elevator mechanism with a lifting stroke is installed on the mast stand column; the wellhead positioning module comprises a strip-shaped frame mounted on one side of the derrick, a large-arm truss with a rotating stroke is mounted on the strip-shaped frame in a liftable manner, a small-arm truss is rotatably mounted on one side of the large-arm truss, and a mechanical gripper is mounted on the small-arm truss. The oil pipe feeding and positioning device has the beneficial effects that the structure is simple, vehicle-mounted installation and use are achieved, actions of all links are tightly and smoothly linked, and oil pipe feeding and positioning in automatic workover operation can be completed.

The utility model discloses a fracturing wellhead water hammer wave tester, which relates to the technical field of petroleum physical exploration, and comprises a wellhead oil pipe buckle joint, a copper gasket, a pressure gauge and a connecting plug, the wellhead oil pipe buckle joint is connected with a wellhead; the copper gasket is arranged between the wellhead oil pipe buckling head and the pressure gauge and is used for sealing and buffering between the wellhead oil pipe buckling head and the pressure gauge; the pressure gauge is used for monitoring wellhead pressure changes in real time; the connecting plug is used for connecting the pressure gauge with an external data processing system. Based on the tester provided by the invention, the pressure change generated during underground fracturing can be accurately and reliably monitored.