630 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 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 the technical field of soil layer or rock drilling, in particular to a well drilling well control intelligent early warning system and method.The system comprises an acquisition unit, an establishment unit, an identification unit, an analysis unit, an evaluation optimization unit and an early warning generation unit; and performing multi-source data fusion analysis by combining edge calculation and a cloud platform, generating an optimized risk assessment result, and outputting a well control early warning instruction. According to the invention, the precision and real-time performance of well control risk monitoring can be improved, the problems that a traditional sensor is susceptible to interference and slow in response speed are effectively solved, and intelligent safety guarantee is provided for drilling operation.

A method may include obtaining reservoir data, hydraulic fracturing data, and static wellbore data for a geological region of interest. The method may further include obtaining temporal production data for the geological region of interest. The temporal production data may include a predetermined production rate with respect to a predetermined period of time. The method may further include determining various temporal features based on the temporal production data and an extraction process. The extraction process may include a deconvolution function that separates a portion of the temporal features from the predetermined production rate. The method may further include determining, using a machine-learning model, predicted hydrocarbon-in-place (HIP) data for the geological region of interest using the reservoir data, the hydraulic fracturing data, the static wellbore data, and the temporal features. The method may further include transmitting a command to a well control system based on the predicted HIP data.

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 well leakage prevention and treatment, in particular to a mud hanging and filling amount calculation method based on annulus liquid level monitoring, which comprises the following steps: establishing a relation model of leakage rate and liquid level height in the drilling fluid leakage process, predicting the position of a leakage balance point, and calculating the leakage pressure difference of each measuring point; establishing a relation model of the leakage pressure difference and the leakage rate, and determining a leakage dynamic function; calculating the liquid level height required to be compensated for the drill tool deficit of the lifting drill; calculating a liquid level height required for balancing formation high pressure, and determining a safe liquid level height; and calculating the time from the current liquid level height to the safe liquid level height to obtain the slurry hoisting and filling amount. By means of the liquid level monitoring technology, the reasonable slurry hanging and filling amount is calculated, calculation parameters are easy to obtain, the process is simple and convenient, and important technical guarantee is provided for well control safety and well leakage treatment measure optimization.

Disclosed is an electric elevator clamp for well workover, which clamp relates to the technical field of well control and blowout prevention. The electric elevator clamp comprises an elevator clamp body (1), a clamp leaf (2), a movable leaf (3), electric push rods (4), a lifting arm (5), a lifting ring (6) and an overturning mechanism, wherein a vertically-penetrating mounting hole is provided in the upper end of the elevator clamp body (1), and a vertically-penetrating notch, the rear portion of which is in communication with the mounting hole, is provided in the upper side of the front portion of the elevator clamp body (1); and after push rods of the two electric push rods (4) are extended, the movable leaf (3) and the clamp leaf (2) are engaged together, and the movable leaf (3), the clamp leaf (2) and the elevator clamp body (1) jointly clamp an oil pipe. By providing the electric push rods (4), traditional hydraulic drive is changed, the laying of a hydraulic pipeline is simplified, and the problem of hydraulic oil leakage is avoided; and the phenomenon in which hydraulic oil has increased viscosity due to the low temperature in winter, resulting in poor fluidity and slow and sluggish actions can be avoided. By providing the overturning mechanism, the upper end of the elevator clamp body (1) can be driven to turn-over back and forth, which facilitates the grasping of the oil pipe on an oil pipe rack; and the electric elevator clamp has the advantages of being safe, labor-saving, simple and efficient.

The invention discloses a new method for constructing an oil reservoir simulation agent model based on transfer learning, and relates to the technical field of petroleum engineering, and the method comprises the steps: building a fine-scale oil reservoir model; constructing a high-fidelity data set; carrying out scale upgrading and coarsening on the oil reservoir model; constructing a low-fidelity data set; constructing a deep learning model; training a pre-training model by using the low-fidelity data; finely tuning the pre-training model by using the high-fidelity data; and predicting output parameters. According to the method, it can be guaranteed that under the condition that a small amount of high-fidelity training data is used, oil reservoir multi-term flow under the variable well control condition can be accurately predicted, dependence on the high-fidelity training data in the agent model building process is effectively reduced, and the agent model building time is shortened on the premise that prediction precision is not affected. According to the method, the embedded module is introduced to process the time-varying well control parameters, the problem that matrix element parameters corresponding to well positions are difficult to effectively diffuse to the whole output result through finite times of convolution is solved, and the global influence of the well control parameters on the output result of the proxy model is improved.

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 discloses a method and device for improving reservoir resolution based on phase control inversion, and the inversion method comprises the steps: carrying out the investigation and measurement of a drilled well in a well control region, obtaining a logging data set, carrying out the recognition of a sandstone reservoir in the well control region according to the wave impedance data and target data of the logging data set, and carrying out the recognition of the sandstone reservoir in the well control region. As the target data is logging data which does not comprise wave impedance data and can identify the sandstone reservoir, when the wave impedance data cannot identify the sandstone reservoir and the target data can identify the sandstone reservoir, it is indicated that the position of the sandstone reservoir cannot be predicted based on the wave impedance, a well control area is divided into a plurality of well control blocks containing drilling, and the position of the sandstone reservoir cannot be predicted based on the drilling. According to the method, corresponding phase control simulation inversion is carried out on each well control block, and due to the fact that a more suitable phase control inversion method is carried out on each well control block, the reservoir position of each well control block can be predicted more accurately, and the reservoir prediction accuracy is further improved.

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 discloses a double-layer optimization method considering well control and profile control and flooding agent parameter setting, and belongs to the field of oil and gas field development engineering.The method comprises the following steps that an oil reservoir profile control and flooding synergistic optimization control model is built, and dynamic profile control and flooding optimization variables are defined; based on actual reservoir operation constraints, constructing a concentration and dosage constraint judgment method of the profile control and flooding agent; a data-driven optimization algorithm is adopted, and a prediction model is trained and constructed to evaluate the effects of different profile control and flooding schemes; a plurality of injection agent opportunity schemes are generated based on a Gibbs sampling method, and each injection agent scheme is optimized to obtain the optimal injection and production liquid quantity and the optimal injection agent concentration; constructing a proxy model mapping relation; iteratively optimizing the profile control and flooding scheme, performing profile control and flooding simulation real evaluation, and updating the profile control and flooding experience library; and iteratively optimizing and outputting an optimal scheme. By introducing the dynamic profile control and displacement strategy and the advanced optimization algorithm, the design efficiency and effect of the profile control and displacement scheme in the complex oil reservoir environment are improved, and powerful support is provided for efficient development of oil and gas fields.

The invention relates to the technical field of well drilling well control processes, in particular to a well sealing perfecting and adjusting device and a pressure control well drilling empty and measuring working condition wellhead sealing method. The sealing device comprises a sealer and a rotary blowout preventer, the lower end of the sealer is connected with the rotary blowout preventer, the sealer and the rotary blowout preventer are sealed through a rotary blowout preventer sealing piece, and a rotary blowout preventer hoop hydraulic cylinder is installed on the side face of the upper end of the rotary blowout preventer. The sealer comprises a shell, a rubber core is arranged on the inner side of the upper portion of the shell, a sealer inner cavity is formed in the inner side of the rubber core, the lower portion of the rubber core is connected with a hydraulic cylinder mechanism, and the shell and the sealer inner cavity are sealed through a shell sealing piece. According to the sealing device for perfecting and adjusting the well and the wellhead sealing method for the pressure-controlled drilling empty and measuring working conditions, the technical defects of a pressure-controlled drilling technology under the empty and measuring working conditions can be overcome, the pressure-controlled technology under the empty and measuring working conditions can be further achieved, and the drilling cost is saved.

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 present application relates to a pressure-operating machine and a conversion method that can be converted between the Additive and American installation modes, belonging to the technical field of pressure-operating machines, including a pressure-operating machine, the pressure-operating machine includes a bracket assembly, a lifting part, a slip device, a well control part, and a hydraulic control part. The slip device includes a fixed slip group and a movable slip group. The fixed slip group includes a movable anti-top slip, a fixed anti-top slip, a fixed load-bearing slip and an active turntable. The active turntable includes a turntable and an upper seat ring, and the movable slip group is connected to the turntable; the well control part includes an annular blowout preventer and a working blowout preventer, and the annular blowout preventer is connected to the fixed load-bearing slip, including a righting column, which is used to be installed between the movable anti-top slip and the lower load-bearing plate, and the fixed anti-top slip is arranged below the lower load-bearing plate to convert from a pressure-operating machine to an American pressure-operating machine. The present application has the effect of reducing the investment cost of oil production equipment.

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.

Systems and methods presented herein facilitate coiled tubing operations, and generally relate to conveying, via coiled tubing, a downhole well tool into a wellbore extending through a hydrocarbon-bearing reservoir, and performing a plurality of downhole well operations (production operations, perforation operations, testing operations, clean out operations, and so forth) using the downhole well tool. In general, the plurality of downhole well operations may be performed using the downhole well tool while maintaining full well control and without removing the downhole well tool from the wellbore.

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 relates to a natural gas hydrate generation inhibitor for deepwater shaft working fluid as well as a preparation method and application thereof. The natural gas hydrate inhibitor SYZ-3 provided by the invention is synthesized by taking a monomer containing a cyclic functional group and a monomer containing a chain functional group as raw materials, azodiisobutyronitrile as a free radical polymerization reaction initiator and dimethylformamide as a free radical polymerization reaction solvent through free radical polymerization reaction. The natural gas hydrate inhibitor SYZ-3 provided by the invention can effectively inhibit secondary generation of hydrates in a shaft, and also can reduce the requirements of a sea area natural gas hydrate drilling fluid system on salt and alcohol thermodynamic inhibitors, so that the drilling fluid performance is guaranteed, the shaft is prevented from being blocked, the well control risk is reduced, and the hydrate exploitation safety is guaranteed; the mining work efficiency is improved, and the method has important significance on construction of a sea area natural gas hydrate low-density strong-inhibition drilling fluid system.

The invention relates to the field of offshore oilfield development, and discloses an offshore drilling well control automation simulation system and an operation debugging method thereof.The offshore drilling well control automation simulation system is characterized in that an upper computer is connected with a PLC control box through an optical fiber, and a controller transmits a control signal to the PLC control box through the optical fiber; the PLC control box transmits information of the sensors arranged at the key connection points to the controller through optical fibers; the throttle manifold and control device is connected with the PLC control box through an optical fiber to simulate fluid flowing out of the annulus to generate a throttling effect; the blowout preventer group and the control device are connected with the PLC control box through a cable; the liquid circulation simulation device is connected with the PLC control box through a cable and simulates liquid circulation during well drilling. The gas invasion annulus simulation device is connected with the PLC control box through a cable and simulates gas invasion annulus during well drilling; the simulation top drive and the simulation winch are connected with the PLC control box through cables until the simulation drill column is located at a preset position. According to the invention, manual misoperation probability and manual operation time can be reduced, and offshore drilling well control efficiency can be improved.

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 belongs to the technical field of natural gas underground, and particularly provides a gas reservoir type gas storage working gas volume optimization design method, which comprises the following steps: determining a gas well seepage radius r and a single well control area Szc by adopting seepage theoretical calculation, numerical simulation II and a well control storage capacity conversion method; the method comprises the following steps: researching the proportional relation between the capacity of a built reservoir and dynamic reserves in the reservoir building process, determining the effective reservoir capacity GKR and the effective area S of the gas reservoir, designing the number n of wells required to be deployed for reservoir building, analyzing the matching between the daily total gas production capacity of the gas reservoir and the designed daily gas production quantity according to peak regulation requirements, optimizing the working gas quantity of the gas reservoir, and finally realizing the benefit building of the gas reservoir.

The utility model discloses a different-stroke type buried pipe loop hydraulic balance structure applied to single well control, which comprises at least one buried pipe group, and the buried pipe group comprises a water segregator, a water collector and a plurality of buried pipes; each buried pipe is correspondingly buried in a pipe well, the pipe wells are arranged in an isosceles right triangle shape, the water segregator and the water collector are arranged at the midpoint of the hypotenuse of the isosceles right triangle, the pipe wells are symmetrically arranged in the isosceles right triangle with the perpendicular bisector of the isosceles right triangle as the boundary, and the closer the buried pipes are to the water segregator and the water collector. And the buried depth is deeper. On the premise that the number of the buried pipes is not changed, hydraulic balance of a system meets requirements, energy consumption of a water pump is reduced, and operation cost of the system is reduced by changing the division mode of the buried pipe group, changing the pipeline arrangement mode of the horizontal connecting pipes and adjusting the buried depth of the vertical buried pipes; meanwhile, the number of sub-catchers is reduced, and initial investment is reduced.