355 results about "Well control" patented technology

The invention is suitable for the technical field of petroleum drilling engineering, and provides a drilling overflow early recognition method based on self-supervised learning, which comprises the following steps: constructing drilling multidimensional parameters into a time sequence sample by using a sliding time window, and inputting the time sequence sample into a multi-branch consistency constraint twinning network (MCSiam); the MCSiam firstly performs data enhancement on a sample, then extracts a local spatial-temporal feature and a long-term dependency relationship through an encoder composed of CNN-LSTM, and performs multi-branch comparative learning, consistency constraint optimization and predictor prediction and model optimization, and the finally trained model is used for early recognition of drilling overflow. The MCSiam is superior to a traditional method and other deep learning models in performance indexes such as accuracy, the calculation complexity is low, the applicability is wide, overflow early recognition is achieved, efficient and reliable technical support is provided for petroleum drilling safety and well control safety, and the method has good practicability and innovativeness in the field of drilling overflow early recognition.

The invention discloses an oil-water well acidification continuous construction electric control system based on multi-parameter monitoring, and relates to the technical field related to acidification control in oil-gas field development, and the system comprises a multi-source data fusion monitoring module which integrates wellhead pressure, temperature, flow, pH value, H2S concentration and acid liquid conductivity, and an underground microwave imaging sensor carries out multi-physical quantity collection; a multi-objective optimization controller is designed, and the acid etching depth, the crack flow conductivity and the construction cost are balanced; the self-adaptive construction control module is based on a variable-frequency and variable-speed acid pump system controlled by a fuzzy sliding mode and is used for realizing stepless regulation of displacement; an intelligent shunting system is arranged, and acid liquor distribution is dynamically adjusted according to the suction volume of each layer section. According to the variable-frequency acid pump system based on fuzzy sliding mode control, stepless adjustment of the displacement is achieved; the intelligent flow distribution system dynamically prepares liquid according to the suction volume of each layer section; and through a three-stage safety interlocking mechanism, power can be cut off and emergency acid discharge can be started within 0.5 second when the temperature rise is greater than or the pressure suddenly changes, so that the well control risk is reduced.

The invention discloses an ultra-deep well drilling wellbore pressure inversion correction method, and aims to improve pressure prediction precision and well control safety in an ultra-deep well drilling process. The method mainly comprises the following two parts: firstly, establishing a wellbore pressure calculation model, fully considering the change of drilling fluid density along with temperature and pressure based on a mass and momentum conservation equation in a drill rod and an annulus, performing discrete solution on the established control equation by adopting a finite difference method, and performing iterative calculation from a well bottom to a well mouth and from the well mouth to the well bottom, so as to obtain a well pressure calculation model; and acquiring pressure and physical property parameters of each node. Secondly, on the basis of model output, a friction correction factor is introduced, a nonlinear state space model is constructed, an unscented Kalman filter (UKF) algorithm is used for conducting dynamic estimation on the friction correction factor, and online self-adaptive correction on the wellbore pressure model is achieved; according to the method, the accuracy of wellbore pressure calculation is effectively improved, and reliable technical support is provided for ultra-deep well operation.

The invention relates to the technical field of natural gas well exploitation, in particular to a water drainage, sand pumping and plug removal device for a power-free gas production pipe column and a using method. According to the technical scheme, the water inlet end of the lower portion of a nozzle is connected with a power water inlet formed in the outer wall of a pump body, a center pipe is arranged at the lower end of the nozzle, the water outlet end of the upper portion of the nozzle is communicated with a formation liquid inlet cavity, an expansion rubber barrel is arranged on the lower side of the pump body, and an upper pressure transmission hole is formed between the expansion rubber barrel and the center pipe; a slip rubber sleeve is arranged on the lower side of the pump body, a slip piece is arranged on the outer side of the slip rubber sleeve, a lower pressure transmission hole is formed between the slip rubber sleeve and the central pipe, and a formation liquid suction inlet is formed in the lower end of the pump body. A washing pipe is arranged at the bottom of the central pipe, and a sand suspending nozzle is arranged at the bottom of the washing pipe. The device has the beneficial effects that under the condition that a gas production pipe column is not moved, a continuous oil pipe is put into an inner cavity of the gas production pipe column to drive the device to pump sand, the sand pumping and plug removal requirements special for a natural gas well are met, and the well control safety and environmental protection problems of the natural gas well are avoided.

The invention relates to the technical field of oil and gas well completion sand prevention, in particular to a sand blasting perforation and sand prevention integrated combined operation device and a construction method. According to the technical scheme, a central pipe is installed in the center of an inner cavity of a jet pump assembly, the lower end of the central pipe extends out of the jet pump assembly, a liquid suction opening is formed in the lower middle portion of the jet pump assembly, a liquid outlet is formed in the outer wall of an upper connector, and a mixing cavity and a diffusion cavity are formed between the jet pump assembly above the liquid suction opening and the central pipe. An outlet of the diffusion cavity is communicated with the liquid outlet; the inner side of the central pipe is movably connected with a lower sliding sleeve; a nozzle is mounted on the jet pump assembly outside the lower flow transfer hole; and the inner side of the upper flow transfer hole of the central pipe is movably connected with a middle sliding sleeve. The method has the beneficial effects that the three processes of sand blasting perforation, blockage removal after perforation and ground filling sand prevention are completed by tripping in the tubular column once, so that the times of tripping the tubular column and using ground construction equipment are reduced, the construction efficiency is improved, the construction cost is saved, and the well control risk in the construction process is reduced.

The utility model relates to a throttling pressure control manifold device, and relates to the technical field of drilling well control. The throttling pressure control manifold device comprises a throttling manifold, a pressure control manifold, a first connecting valve, a second connecting valve and a third connecting valve. The throttling manifold and the pressure control manifold are arranged at intervals in the first direction. And the throttle manifold is communicated with the pressure control manifold at the first connecting valve, the second connecting valve and the third connecting valve. The throttle manifold comprises a main throttle pipeline. The pressure control manifold comprises a main pressure control pipeline. Wherein the first connecting valve is connected with an inlet of the main throttling pipeline, and the first connecting valve is connected with an inlet of the main pressure control pipeline. The second connecting valve is connected with an outlet of the throttling manifold and connected with an inlet of the pressure control manifold. And the third connecting valve is connected with an outlet of the main throttling pipeline and an outlet of the pressure control manifold. According to the throttling pressure control manifold device, the throttling manifold and the pressure control manifold can work cooperatively to achieve two times of pressure control.

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 provides a controller for overflow leakage monitoring processing, an overflow leakage monitoring processing system, an overflow leakage monitoring processing method, an overflow leakage monitoring processing device, computer equipment and a computer readable storage medium. The controller is configured to be used for receiving ground monitoring information from a ground monitoring unit and underground monitoring information from an underground monitoring unit; performing working condition identification on the ground monitoring information and the underground monitoring information through a working condition identification model to obtain a working condition identification result; performing overflow monitoring on the ground monitoring information and the underground monitoring information through an overflow monitoring model corresponding to the working condition identification result; and in response to the monitored overflow condition, the overflow amount is calculated, and in response to the situation that the overflow amount is within a preset overflow range, the controller starts corresponding overflow processing operation. Overflow monitoring of complex well bottom conditions under various working conditions is achieved, overflow leakage can be treated automatically, the well control risk is reduced, and safe and efficient drilling operation is guaranteed.

The invention provides an experimental device and method for simulating gas invasion well control of a complex karst cave type stratum. The device comprises a well drilling simulation system, a liquid-gas simulation system and a computer control system. The computer control system simulates an overflow and leakage coexistence scene by adjusting the well drilling simulation system and the liquid-gas simulation system, and in actual well drilling, if overflow and leakage occur, corresponding well drilling parameters can be collected according to overflow signals generated by actual well drilling; and corresponding control instructions and control parameters are output through the drilling parameters and the overflow and leakage control strategy, and the treatment effect and treatment efficiency of overflow and leakage coexistence are improved.

The invention discloses an underground packer coupling integrity diagnosis system and a digital twinborn life prediction method. The system comprises a data acquisition layer, an edge computing layer, a cloud analysis layer with a built-in L4-level digital twin system and an application layer which are connected in sequence. According to the method, vibration, corrosion and other parameters are collected through a sensor, after preprocessing of an edge layer, a cloud calls a three-field coupling dynamic model, multi-field parameters, the failure probability and the remaining life are calculated in combination with an LSTM and Bayesian fusion algorithm, and an application layer outputs diagnosis results and maintenance suggestions and forms a closed loop. The problems that traditional methods depend on experience, multi-field coupling is difficult to quantify and the digital twinborn level is low are solved, the maintenance cost can be reduced, the well control accident risk is reduced, and a key technical support is provided for predictive maintenance of an oil and gas well.

A method for the time-depth conversion of a concealed structure in a foreland thrust belt with a low exploration degree. The method comprises: obtaining velocity variation characteristics of a study area; using seismically interpreted horizons and fault data in a time domain to establish a geological structure model; by means of a stratigraphically controlled and fault-block-division-based velocity assignment method, converting the geological structure model into an interval velocity model; establishing virtual well control points in the study area, and extracting from the interval velocity model an interval velocity curve at each virtual well control point (S400); converting the interval velocity curve at each virtual well control point into an average velocity curve (S500); using a stratigraphically controlled and fault-block-division-based virtual well control point spatial interpolation method to construct a three-dimensional average velocity volume; and performing time-depth conversion on target horizons. Further provided is an apparatus for the time-depth conversion of a concealed structure in a foreland thrust belt with a low exploration degree. By means of an obtained depth-domain structural map, the identification of a concealed structure in a foreland thrust belt with a low exploration degree can be realized, thereby providing reliable depth data for the detailed description of traps.

The invention discloses an automatic hard well shut-in method and system integrated with a petroleum drilling machine control system, and relates to the technical field of petroleum drilling machine well control. According to the method, the drilling working condition is monitored in real time, an overflow trigger index is calculated, the overflow risk in a shaft is judged, and a hard well shut-in process is started after an alarm is given; the position of a hook and the position of a drill rod joint are monitored in real time, a winch safety stop index is calculated, whether the operation state of the winch is safe or not is judged, the hook is automatically moved to the optimal stop point, and the winch is braked; top drive and slurry pump linkage control is started, a top drive and slurry pump linkage control coefficient is calculated, whether the static working condition before well control is met or not is judged, and equipment is stopped or a strategy is executed accordingly; monitoring the action of the blowout preventer and the state of the hydraulic system, calculating the consistency index of the action of the blowout preventer, judging whether the action of the blowout preventer meets the well shut-in requirement or not, and giving a strategy if the action does not meet the well shut-in requirement; real-time judgment of the overflow risk and automatic hard shut-in of the well can be achieved, the safety of the well mouth is guaranteed, and the risk of manual misoperation is reduced.

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.

A control system for controlling pressure of fluid within a wellbore includes a rotating control device (RCD), a distribution manifold, a choke and kill (CK) manifold, and a managed pressure drilling (MPD) manifold fluidly connected with each other, a sensor operable to facilitate fluid measurements indicative of a property of the fluid, and a controller communicatively connected with the distribution manifold and the sensor. The controller is operable to receive the fluid measurements, cause the distribution manifold to direct the fluid discharged out of the wellbore via the RCD to flow through the MPD manifold to thereby permit the MPD manifold to control the pressure of the fluid within the wellbore, and cause the distribution manifold to direct the fluid discharged out of the wellbore via the RCD to flow through the CK manifold to thereby permit the CK manifold to control the pressure of the fluid within the wellbore.

The invention provides a marine drilling shallow gas monitoring and shunting device and method. The marine drilling shallow gas monitoring and shunting device comprises a wellhead sealing and shunting device, a formation fluid monitoring and shunting device and a remote control device. The method comprises the steps of determining the direction of a blowout prevention pipeline, selecting the size of a blowout pipeline suitable for construction, establishing a calculation model and conducting risk assessment, conducting software comprehensive analysis to achieve early warning on early discovery of shallow gas, designing a pipeline anti-blocking purging device, and remotely controlling the blowout direction of the blowout pipeline. Through the novel wellhead sealing and shunting device, the micro-flow shallow gas monitoring device, the remote rapid shunting blowout device and the pipeline anti-blocking device, and a remote monitoring and control module, rapid judgment and early warning of early discovery of shallow gas are realized in a real-time sealed wellhead environment, and related valve states are rapidly acted, so that the safety of a well is ensured. And the well control risk is reduced, and the harm of shallow gas to a drilling platform and operators can be fundamentally solved.

The invention relates to the technical field of oil and gas drilling and production well control safety, and discloses a hydraulic blowout preventer monitoring method and device and a storage medium. The method comprises the steps that hydraulic flow data in a hydraulic pipeline opening and / or closing process of a hydraulic blowout preventer are obtained, and whether the hydraulic flow data are normal or not is judged; based on the hydraulic flow data, whether the hydraulic blowout preventer completes closing or opening operation or not is judged, and whether closing or opening is normal or not is judged; when it is judged that the hydraulic blowout preventer completes the closing operation, air pressure data associated with an air path for controlling the drilling machine to brake are obtained; judging whether the air pressure data is lower than a safety threshold; and if the air pressure data is lower than the safety threshold value, a first alarm signal indicating brake failure is generated and output. According to the system, the well shut-in state and brake effectiveness can be verified, and an alarm can be given in time when safety interlocking is abnormally removed, so that the accident that a drilling tool is lifted and broken due to state misjudgment or human negligence is fundamentally eradicated, and the problem that the safety state cannot be monitored is solved.

The invention provides a drilling fluid outlet flow anti-disturbance monitoring method and device, a medium and a program product, and the method comprises the steps: obtaining a liquid level echo signal through a millimeter-wave radar liquid level meter installed above a drilling fluid outlet buffer tank, and inhibiting an environment interference factor through time domain and frequency domain fusion adaptive filtering of dynamically adjusting a weight according to a signal-to-noise ratio; inputting the filtering signal into a BP neural network to obtain phase information influenced by the liquid level disturbance interference factor, and combining a physical information neural network to obtain a radar wave attenuation coefficient corresponding to the phase information; on the basis of a liquid level fluctuation and radar echo attenuation quantitative model, liquid level height variation is obtained by integrating phase information and radar wave attenuation coefficient inversion calculation, the current liquid level height is obtained by combining the liquid level height with radar ranging liquid level height, and the relative flow change of the drilling fluid in the buffer tank is judged. High-precision flow monitoring is achieved under the conditions of liquid level disturbance and environment disturbance, and well control safety and the intelligent level of drilling operation are improved.

The invention provides a blowout control method based on wellhead methane adsorption, which comprises the following steps of: compounding a methane adsorption material with other necessary drilling fluid additives to form high-density composite well killing fluid in a key stage (namely when well control dangerous conditions such as overflow or well kick occur) before blowout; and then, at the position 100-200 m below a well mouth, the composite well killing fluid is injected into a shaft through special well killing fluid injection equipment according to preset injection parameters. According to the method, slipping and rising of methane bubbles invading a shaft are effectively restrained through the high density of well killing fluid, meanwhile, methane gas in the shaft is adsorbed in real time through a methane adsorption material compounded in the well killing fluid, gas column expansion and pressure rising are effectively controlled in the early stage of gas invasion through the dual-action mechanism of density suppression and active adsorption, and the gas invasion safety is effectively improved. Therefore, blowout is prevented or development of blowout is restrained.

The invention discloses a water seal pressure test system and method for oil field well control equipment, belongs to the technical field of pressure test systems, and provides the following scheme that the water seal pressure test system comprises water seal pressure test equipment, and a detection mechanism is arranged on one side of the water seal pressure test equipment; according to the invention, water seal pressure test equipment is ventilated to enter a hose, so that gas is shunted to enter a piston cylinder, a piston rod and a rotating roller are controlled by air pressure to displace, the rotating roller displaces to drive an annular plate and a gear ring to rotate through an obliquely arranged guide port, and after the gear ring and a gear are in transmission, a limiting piece can rotate; the angle of the annular plate is kept fixed until the rotating roller enters a short guide opening, the position of the sealing assembly can be locked through clamping between a limiting piece and a limiting part, and therefore in the upward resetting process of misoperation of the hydraulic equipment, an adjusting plate presses a second switch to give an alarm through an alarm, and the situation that the equipment is prone to being damaged due to disassembly in the under-pressure state is prevented; and meanwhile, the safety risk is increased.

A stress sensitivity analysis method for a fractured gas reservoir includes: S1, calculating a material balance quasi-time; S2, calculating a normalized production; S3, calculating a single well controlled reserve; S4, analyzing and judging a stress sensitivity. Based on the normalized quasi-pressure and quasi-time, the gas well test analysis is carried out, and the stress sensitivity of the actual reservoir is determined by taking the original bottom hole flowing pressure of the actual reservoir as the starting point, the obtained reservoir stress sensitivity is more in line with the actual situation of the reservoir, and the obtained reservoir stress sensitivity is more accurate, which provides more valuable values for reservoir protection, oilfield development, and development planning.

The well control emergency throttling device comprises a throttling valve assembly, a connecting mechanism and an executor, the executor is an electric executor, one end of the executor is an output end, the other end of the executor is a manual end, the manual end is of a regular hexagon structure, and the size of the manual end is the same as that of the regular hexagon structure of a valve rod nut; the output end is connected with the connecting mechanism, and the manual end is provided with a hand wheel. One end of the actuator is arranged to be the manual end, the manual end is of a regular hexagon structure and is the same as the regular hexagon structure of the valve rod nut in size, the output end is connected with the connecting mechanism, the manual end is provided with a hand wheel, the throttle valve can be changed in a manual and electric driving mode, and after the actuator is detached, the manual end is connected with the valve rod nut. The hand wheel of the actuator can be directly installed on the regular hexagon structure of the valve rod nut of the connecting mechanism, so that the well control emergency throttling device can still be operated manually, and the throttling valve can continue to work.

The invention discloses a digital twinning-based intelligent control system and method for butt-joint drilling of a horizontal well penetrating through a goaf coal pillar, and relates to the technical field of drilling and coal mine safety. The system comprises a data acquisition and transmission module for acquiring and transmitting multi-source heterogeneous data of a to-be-drilled goaf; the digital twinning module constructs a digital twinning model; the while-drilling perception and dynamic risk assessment module is used for acquiring and processing while-drilling measurement data and fusing the data with digital twinborn model data to generate a visual dynamic risk field; the intelligent decision and control module is used for generating a safe drilling path and a drilling parameter control instruction; the execution and well control module executes the control instruction and regulates and controls drilling equipment and a well control device; and the man-machine interaction module is used for displaying the risk information and realizing man-machine According to the method, the conversion of drilling safety from passive response to active prediction and intelligent control is realized, and the safety and the success rate of drilling operation penetrating through the goaf coal pillar are improved.

The utility model discloses a novel standard valve which comprises a fishing head, an outer pipe assembly is fixedly arranged on the fishing head, an inner pipe assembly is movably arranged in the outer pipe assembly, a valve element assembly is fixedly arranged on the inner pipe assembly, and the valve element assembly is arranged at one end of the outer pipe assembly. According to the novel standard valve, the outer pipe assembly, the inner pipe assembly and the shear pin are used in cooperation, so that the novel standard valve is in different states in the working process and the throwing and fishing process, and in the working state, fluid can be blocked from left to right and can circulate from right to left; in a salvage state, left and right fluids can circulate; the Tesla valve is characterized in that when the Tesla valve is in a working state, fluid needs to pass through the Tesla valve channel, due to the uniflow property of the Tesla valve channel, the fluid cannot pass through the fluid channel smoothly, the purpose of preventing the fluid from flowing is achieved, when the right liquid flows through the Tesla valve channel in the forward direction, the right liquid can pass through the Tesla valve channel smoothly, the overall structure is simple, and operation is convenient. Not only is the use cost reduced, but also the well control risk during oil well operation is reduced.

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 invention discloses a well cementation sealing compensation device. The method comprises the steps that limiting bosses are arranged at the two ends of a framework body respectively, and at least one hole is formed in the framework body; the framework body is sleeved with the protective sleeve, and the two ends of the protective sleeve are limited through limiting bosses. And the vulcanized colloid is filled between the outer wall of the framework body and the protective sleeve and on the inner wall of the framework body. The auxiliary sealing device can assist in well cementation conveniently and efficiently at low cost, achieves the sealing effect, provides a new auxiliary sealing method for solving the problem of annulus pressure caused by oil-gas-water channeling caused by cement sheath micro-ring gaps / insufficient cementation, effectively relieves the problem of annulus pressure, and accordingly improves well cementation quality, prolongs the service life of a shaft and guarantees well control safety of oil and gas fields.

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.