946 results about "Oil well" patented technology

The invention discloses an oil well intelligent monitoring and remote control system, which belongs to the technical field of oil well monitoring and control, and is characterized by comprising the following steps: acquiring oil well production data, and obtaining a real-time indicator diagram and indicator diagram characteristics according to a preset electrical parameter inverse demonstration indicator diagram model; sending a preset security perturbation instruction sequence and obtaining response data corresponding to the security perturbation instruction sequence; obtaining core mechanism parameters of the oil pumping unit system based on the response data and a preset safety perturbation instruction sequence; obtaining a digital shadow model according to the core mechanism parameters and the indicator diagram characteristics; according to the method, core mechanism parameters are identified through anti-demonstration indicator diagram characteristics of an electric parameter anti-demonstration indicator diagram model and a safety perturbation instruction, and closed-loop intelligent control from oil well state monitoring to liquid production flow regulation and control is formed through the digital shadow model. And the accuracy of oil well flow control, the safety of system operation and the energy efficiency management level are improved.

The invention provides an oil well load indicator diagram prediction method and system, and the method comprises the steps: synchronously collecting an initial electrical parameter data set, a load data set, an accelerometer data set and a barometer data set of an oil well, the initial electrical parameter data set comprising an active power data unit, and then obtaining an active power data segment and a load data segment; obtaining a time lag based on the two, and further obtaining a final electrical parameter data segment; acquiring a reference displacement sequence through the accelerometer data set and the barometer data set; obtaining a dynamic stroke length based on the reference displacement sequence and the load data segment, and further obtaining a final displacement sequence; and constructing a prediction neural network, and obtaining an oil well load indicator diagram based on the prediction neural network and the real-time electrical parameter data segment. According to the technical scheme, the indicator diagram is obtained through continuous and high-frequency real-time electric parameter data segments, motion period information loss caused by low-frequency data collection is avoided, accumulative errors are avoided, and the accuracy of the indicator diagram is ensured.

The invention relates to a physical knowledge-guided model interpretability analysis method and diagnosis system, and belongs to the technical field of oil well fault diagnosis, and the method comprises the steps: collecting sensor data in an indicator, carrying out the standardization processing of the data, and obtaining a preprocessed grayscale image, and taking the preprocessed grayscale image as an oil well fault diagnosis offline data set; constructing an oil well working condition intelligent diagnosis model guided by physical knowledge based on improved EffcientNet, and taking a well fault diagnosis offline data set as model input; optimizing parameters of the oil well working condition intelligent diagnosis model by adopting a multi-task cooperative training mechanism based on uncertainty weighting to obtain an optimized oil well working condition intelligent diagnosis model; performing performance quantitative evaluation on the optimized oil well working condition intelligent diagnosis model by adopting a multi-dimensional index; oil well working conditions are monitored and diagnosed in real time, a result is output, and abnormity is responded. According to the invention, accurate and explainable intelligent diagnosis of the real-time working condition of the oil well is realized.

Disclosed are methods, systems, and computer-readable medium to perform operations including: obtaining production data about the well; generating a simulated average reservoir pressure at the subsurface region that includes the well; computing a difference between an average reservoir pressure obtained from the production data and the simulated average reservoir pressure; determining, based on the computed difference, a performance deviation with reference to a particular area of the subsurface region that includes the well; comparing the performance deviation to a predetermined threshold value that represents an acceptable tolerance for variance in performance of the well; and triggering, when the performance deviation exceeds the predetermined threshold value, a particular type of automated response comprising an action that addresses the variance in performance of the well.

The invention discloses an oil and gas shaft multiphase flow simulator MphaseSim modeling method and a PINN solving method, and relates to the technical field of oil and gas field exploitation, and the method comprises the following steps: pre-calibrating a modeling strategy, including calibrating gas-liquid two-phase flow, and calculating the average flow velocity according to the section occupied by the gas-liquid two-phase flow; mass transfer can occur between the calibrated gas and liquid phases, but the gas and liquid phases are always in a thermodynamic equilibrium state; in calibration steady-state analysis, the mass flow of any section of the shaft is equal, and the liquid holdup is calculated through a drift-assisted equation. According to the method, on the basis of a mass-momentum-energy coupling mathematical model, the SRK state equation and the drift flow model are combined, the phase change characteristics, momentum transfer and energy conversion rules of the gas phase and the liquid phase can be accurately represented, the model sealing performance is good, and the physical significance is clear; and the device can be stably applied to different types of oil and gas well scenes such as gas wells, deep oil wells and electric submersible pump wells, has no obvious numerical value divergence problem in long shaft flow simulation, and can effectively reflect the real production state of the shaft.

The invention provides a fracture form prediction method, and the method comprises the steps: constructing a database based on geological parameters, engineering parameters and fracture form parameters corresponding to at least one oil well in a first preset time period; wherein any oil well comprises at least one fracture formed based on a volume fracturing technique. And acquiring logging curve parameters corresponding to at least one oil well. And based on the logging curve parameter corresponding to any oil well, carrying out expansion operation on the geological parameter corresponding to any oil well in the first preset time period so as to update the database. And training a preset model based on the updated database to obtain a target model. And acquiring geological parameters and engineering parameters corresponding to the to-be-predicted oil well in the second preset time period. And inputting the geological parameters and the engineering parameters corresponding to the to-be-predicted oil well in the second preset time period into the target model, and determining the output of the target model as the fracture form parameters corresponding to the to-be-predicted oil well in the second preset time period, so as to improve the accuracy of predicting the fracture form of the to-be-predicted oil well.

This disclosure belongs to the oil and gas exploitation industry, and specifically relates to a combination parameter optimization design method for fracturing and packing dual-particle-size proppants for an unconsolidated sandstone reservoir. According to this disclosure, specific parameters of proppants including a packing particle size, a packing fracture length ratio, and a packing sequence are subjected to optimization design based on reservoir and oil well conditions, as well as corresponding dual-particle-size combination modes. Ultimately, comprehensive effects of realizing effective sand blocking, reducing invasion, blockage, and permeability damage of formation sand to a fracture packing layer, reducing fracture flow resistance, improving comprehensive conductivity, and releasing a production capacity of oil and gas wells are achieved.

The invention provides a pumping unit and a fluid balancing method, and belongs to the field of petroleum extraction machinery. The pumping unit comprises a base, a supporting seat is fixedly installed on the base, and a motor, a speed reducer and a support are installed on the supporting seat. The walking beam is connected with the bracket through a bearing seat; an output shaft of the speed reducer is connected with the walking beam through a crank and a connecting rod of the four-rod mechanism; the two ends of the walking beam are connected with a first horse head and a second horse head respectively, the first horse head and the second horse head are communicated through a connecting pipe arranged between the first horse head and the second horse head, an electric valve is arranged on the connecting pipe, and an electric cabinet is further arranged on the supporting seat and electrically connected with the electric valve. The oil pumping unit is used for two oil wells close to each other, the function that one oil pumping unit pumps two oil wells is achieved, the equipment investment of one oil pumping unit can be saved, the running loss of one oil pumping unit is reduced, and fluid balance is used for balancing the load difference of the two oil wells; after the balance box is arranged on the second horse head, the second horse head can be only used for pumping oil of one oil well, and fluid balance is used for weight difference between the oil well and the balance box.

The invention relates to the technical field of oil field layered mining, in particular to a same-well layered injection-production pipe column. The same-well layered injection and production pipe column comprises a driving pipe column and a working pipe column, an oil well pump is arranged at the bottom end of the driving pipe column, an injection and production sealing connector is arranged below the oil well pump, and the flowing direction of underground fluid is changed through the injection and production sealing connector; the working pipe column is divided into a plurality of working sections through packers, and a water distributor or a bottom-hole regulator which works in a one-way mode is arranged in each working section. The top end of the working pipe column is provided with an insertion pipe detachably connected with the injection-production sealing connector. According to the same-well layered injection and production pipe column, the injection and production sealing connector is arranged to be matched with connection and separation between the insertion pipe and the injection and production sealing connector to achieve switching of a water injection channel and an oil production channel, and the same-well layered injection and production work can be continuously conducted under the condition that the pipe column is pulled out of a well opening through cooperation with the water distributor and the bottom-hole regulator which work in a one-way mode; the tubular column is simple in structure, low in operation difficulty and long in working time.

The invention belongs to the technical field of intelligent oil field and oil and gas yield prediction, and particularly discloses an oil well yield prediction method and system based on a frequency domain enhanced BiLSTM-Transformer hybrid model, and the method comprises the steps: collecting oil well historical production time sequence data, and carrying out the abnormal value elimination and normalization preprocessing; constructing a multi-scale feature system, and integrating a time domain lag term, a rolling statistic, and frequency domain dominant frequency and amplitude features extracted through Fourier transform; introducing an oil well embedding vector to explicitly compensate the inter-well static difference; the features are input into a BiLSTM-Transform hybrid model, a local dynamic state is captured by the BiLSTM, and a global trend is modeled by the Transform; an oil well level adaptive optimization strategy is adopted, sample imbalance is relieved through sample dynamic weighting and adaptive learning rate scheduling, and the generalization ability is improved in combination with gradient cutting and an early stop mechanism; and finally outputting an oil well yield prediction value. According to the method, the problem of prediction deviation caused by yield sequence non-stationarity, inter-well difference and sample imbalance is effectively solved, and the prediction precision is remarkably improved.

The invention provides a self-adaptive pressure compensation type oil-water separation control system for an oil well, and relates to the field of oil exploitation, and the system comprises a working condition sensing module which is used for collecting state data of an oil-water separation mixture; the working condition pre-judging module is used for identifying a current oil-water separation working condition and a fluid characteristic change trend; the pressure compensation module is used for determining an optimal pressure parameter based on the current oil-water separation working condition and the fluid characteristic change trend; the pressure regulation execution module is used for controlling the operation of the oil-water separation control system based on the optimal pressure parameter; the feedback calibration module is used for collecting the mixing uniformity of an oil-water separation mixture, the water content of separated crude oil and the oil content of water, and optimizing a time window for fluid characteristic change trend identification; and the multi-mode switching module is used for indicating the pressure compensation module to adjust the optimal pressure parameter based on the sand content data and the instantaneous flow data of the oil-water separation mixture, and has the advantage of improving the oil-water separation effect.

The utility model discloses an oil well casing pipe deflation valve which comprises a protection box, a deflation unit is arranged on the inner side of the protection box, a PLC is fixedly connected to the front side of the protection box, an alarm is fixedly connected to the upper side of the protection box, the deflation unit comprises a first fixing cylinder, the first fixing cylinder is fixedly connected to the inner side of the protection box, and a second fixing cylinder is fixedly connected to the inner side of the protection box. The outer side of the first fixing cylinder is fixedly connected with a fixing pipe, the right end of the fixing pipe is fixedly connected with a control box, the lower side of the control box is fixedly connected with a connecting pipe, the lower end of the connecting pipe is fixedly connected with a second fixing cylinder, and the lower side of the first fixing cylinder is fixedly connected with an insertion pipe. By arranging the first fixing cylinder, the second fixing cylinder, the first spring, the second spring, the first valve ball, the second valve ball, the first deflation pipe, the second deflation pipe and the control box, the second valve ball in the second fixing cylinder can be conveniently switched to be used after the springs of the deflation valve are fatigued for a long time, the deflation valve can be normally used, and pressure unbalance in an oil well is avoided.

The application provides a direct push storage type production logging system and method, which comprises a depth-time recording device, which obtains a real-time logging depth signal by using a sensor and a winch assembly parameter of a working machine; a downhole detection module connected with a winch of an oil well working machine and a tubing, which pushes the detection module to a measurement target layer by connecting the tubing to form a pipe column with a certain length to obtain downhole logging data; a downhole storage module which stores the downhole detection data; and a collection control module which communicates with the depth-time recording device and the downhole storage module, and which is used for realizing data collection and correction and generating a logging file corresponding to data and depth. By using the above system, even under the condition of complex well conditions such as inclined wells or horizontal wells, the target layer can be reliably and stably reached, and the overall downhole production or injection condition can be obtained, and the data is corrected based on the downhole magnetic positioning data, so that repeated data processing is avoided, and the detection efficiency and reliability are significantly improved.

The petroleum drilling system comprises a base, the base is horizontally placed on the ground, a through hole is formed in the middle of the base, a transverse plate is arranged above the base in a lifting mode, a first motor is arranged above the transverse plate, and an outer pipe is arranged below the transverse plate; the top of the outer pipe is connected with an output shaft of the first motor pair, a drill bit is arranged at the bottom of the outer pipe, and a hole channel is formed in the drill bit in a penetrating mode and communicates with the outer pipe. An inner pipe is arranged on the inner side of the outer pipe, a plurality of adjusting assemblies are arranged below the inner pipe, each adjusting assembly is connected with the inner side wall of the outer pipe, and the size of an opening in the upper end of a space formed by the adjusting assemblies is larger than that of an opening in the lower end of the space. A water pump and a liquid tank are further arranged on the base; the water pump can control the liquid tank to enable drilling fluid to enter and exit from the inner pipe and the outer pipe; by replacing the manufacturing material of the inner pipe, the overall mass of the inner pipe is lighter, and then the fixing degree of the plug pin to the inner pipe is improved.

The application discloses an oil well development method and device, and belongs to the technical field of oil exploitation. The method comprises the following steps: acquiring reservoir data of a target oil reservoir, wherein the reservoir data comprises oil layer thickness and oil saturation of N oil-bearing sand layers; drilling to a first position with a first length in the target oil reservoir at a first angle of inclination to obtain a first section of oil layers of an oil well; determining a target oil-bearing sand layer based on the oil layer thickness and the oil saturation of the N oil-bearing sand layers; adjusting the angle of inclination to a second angle, drilling to a second position with a second length from the first position at the second angle to obtain a second section of oil layers of the oil well; adjusting the angle of inclination to a third angle, and drilling to a third position from the second position at the third angle to obtain a third section of oil layers of the oil well; determining a target oil well based on the first section of oil layers of the oil well, the second section of oil layers of the oil well and the third section of oil layers of the oil well, and carrying out oil extraction based on the target oil well. The method can improve the oil production of the target oil well and improve the oil layer drilling rate of the target oil well.

The invention relates to the technical field of oil and gas development, in particular to a carbonate reservoir oil well parameter screening method and a geological well selection method. The carbonate reservoir oil well parameter screening method comprises the steps that dependent variable parameters and a plurality of independent variable parameters are screened out, test values of all variable parameters of a plurality of sets of known oil wells are obtained, a dimensionless regression model is established, estimated values of dimensionless regression coefficients before all the independent variable parameters are calculated through a least square method, and the estimated values of the dimensionless regression coefficients before all the independent variable parameters are calculated. And evaluating the dimensionless regression model, determining dimensionless regression coefficients conforming to evaluation as influence factors, screening out key influence factors, and determining well selection key parameters. According to the method, key well selection parameters are rapidly screened out through the dimensionless regression model, the average level of variable parameters does not need to be found, processing is more convenient, a foundation is provided for rapid well selection, the well selection efficiency is effectively improved, and meanwhile the requirement for high recovery efficiency can be met.

The invention relates to the technical field of oil well paraffin removal, in particular to an electric submersible screw pump well anti-paraffin-deposition chemical injection and thermal washing integrated device. Comprising a pesticide injection barrel, a high-pressure plunger pump, a three-way valve and a connecting pipe, the connecting pipe is fixedly connected and communicated with a plurality of butt-joint pipes, annular injection assemblies with the same number as the butt-joint pipes are arranged outside an oil pipe, and the butt-joint pipes are communicated with the corresponding annular injection assemblies respectively. A paraffin remover and hot water are injected at fixed points at different depths of an oil pipe through a plurality of butt joint pipes, so that a paraffin removal medium completely bypasses the electric submersible screw pump, chemical swelling and high-temperature thermal damage of the agent to stator rubber are avoided fundamentally, the service life of the pump is remarkably prolonged, meanwhile, the paraffin remover and the hot water are continuously supplemented at different depths, and the service life of the pump is prolonged. The concentration of the paraffin remover is kept stable, the temperature of hot water is kept, the dissolving strength of the paraffin remover on a paraffin precipitation layer and the melting effect of the hot water on wax are ensured, and the paraffin removal thoroughness and the operation efficiency are greatly improved.

The present application relates to a kind of oil well metering technical field, and is a kind of oil well production metering device, metering method, the former includes the pipeline expansion pipe being connected with upper chamber in the upper part of upper chamber, siphon pipe and communication pipe are arranged between upper chamber and lower chamber, siphon pipe inlet is connected with upper chamber, siphon pipe outlet is connected with lower chamber, siphon pipe upper portion elbow pipe is located in the upper part of upper chamber, water content measuring instrument is arranged on siphon pipe, liquid level sensing unit is set at the position corresponding siphon pipe upper portion elbow pipe and siphon pipe inlet in the inside or outside of upper chamber, the end of communication pipe is connected with upper chamber at the position higher than siphon pipe upper portion elbow pipe.The present application utilizes siphon principle to realize the change of oil well production output from irregular oil-gas mixed phase flow to regular gas or liquid single phase flow, realizes the metering of oil well production output, and the metering result can meet the accuracy required by oilfield geology, and the cost is low, safe and reliable, and the degree of automation is high.

A system comprising: a bottom hole assembly having a MWD tool comprising: a wireless telemetry module; sensor(s); a MWD processor; and medium storing instructions that when executed by the MWD processor cause the MWD processor to: obtain, from the sensor(s), a measurement value of a downhole parameter; determine an encoding format for the measurement value by comparing the measurement value to at least two ranges with each range associated with a separate encoding format having a compression level; apply the determined encoding format to the measurement value to generate a compressed measurement value; and transmit, utilizing the wireless telemetry module using wireless telemetry, the compressed measurement value; and a surface computer system configured to decode the compressed measurement value and utilize the decoded measurement value.

The embodiment of the invention relates to the technical field of oil and gas field development, and discloses a shale oil reservoir carbon dioxide huff and puff recovery ratio prediction method and equipment, and the method comprises the steps: determining a first influence weight for a fracturing fracture morphological parameter in geological parameters and fracturing construction parameters; determining a second influence weight of the geological parameter, the fracturing construction parameter, the fracturing fracture morphological parameter and the carbon dioxide huff and puff mining parameter on the shale oil well productivity; according to the fracturing fracture propagation key parameters, the microseism monitoring fracture morphological parameters, the numerical simulation fracturing fracture morphological parameters and a pre-generated type-2 fuzzy logic model, determining a fracturing fracture morphological propagation key parameter range under different geological parameter, rock mechanics and fracturing construction parameter grade conditions; and predicting the recovery ratio of the target shale work area according to the fracturing fracture form extension key parameter range and different artificial neural networks. According to the method, the shale oil reservoir CO2 huff and puff recovery efficiency can be efficiently, intelligently and accurately predicted.

The invention belongs to the field of oil field well site energy supply, and discloses a gravity and electrochemistry hybrid energy storage oil well micro-grid system and an energy supply method. The system comprises a clean energy power generation device, an energy storage device, a production load, a power distribution device and an energy management device. Wherein the energy storage device comprises gravity energy storage equipment and electrochemical energy storage equipment, and the gravity energy storage equipment is formed by transforming an idle well in a well site. According to the system, the super-generating capacity of wind and light power generation is converted into potential energy to be stored in the gravity energy storage equipment, the gravity energy storage equipment can serve as a long-time energy storage device, when wind and light output is insufficient and the electrochemical energy storage equipment is insufficient in energy supply, the potential energy of the gravity energy storage equipment can be converted into electric energy to supply power to a load, and the energy utilization rate is increased; and the energy supply stability of the system is enhanced. In addition, the gravity energy storage device is formed by transforming an idle well in a well site, and is economical and environmentally friendly.

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

The utility model relates to the technical field of oil extraction, in particular to an efficient temporary plugging anti-overflow device. Comprising an upper connector, the upper connector is fixedly and hermetically connected with a valve connector, the lower end of the valve connector is fixedly and hermetically connected with a filter pipe and an outer cylinder, the filter pipe is located on the inner side of the outer cylinder, the valve connector is provided with an air hole communicated with an annular cavity between the outer cylinder and the filter pipe, and a check valve is installed in the air hole; the lower end of the filter pipe is fixedly and hermetically connected with a lower pipe located inside the outer cylinder, the lower end of the lower pipe is blocked and fixedly connected with the lower end of the outer cylinder through a lower connector, and a temporary blocking plate is detachably, fixedly and hermetically connected into the lower connector. Through soluble temporary plugging, multi-stage filtering, gas-liquid separation and modular sealing design, the device has the core advantages of efficient overflow prevention, rapid production, airlock prevention, low maintenance cost and the like, has both environmental protection property and economical efficiency, and is suitable for oil well operation under complex working conditions.

The utility model discloses a clockwise rotation sucker rod anti-falling centralizer which comprises a centralizing assembly used for centralizing and antifriction of a sucker rod and a connecting assembly used for being in butt joint with a sucker rod string, the connecting assembly is arranged on the centralizing assembly, and an anti-falling assembly used for one-way locking is arranged in the connecting assembly. An outer sleeve used for wrapping the anti-disengaging assembly is arranged between the centralizing assembly and the connecting assembly. By means of the linkage design of the anti-disengaging assembly and the upper spiral angle teeth, the functions that the sucker rod is clamped and prevented from disengaging during clockwise rotation and is loosened and convenient to install during anticlockwise rotation are achieved, and the technical problem that in the prior art, the sucker rod is prone to disengaging is solved; meanwhile, when the oil rod reciprocates up and down, the anti-falling centralizer is driven through the pressure of the liquid amount, eccentric wear of the oil rod is prevented through rotation of the anti-falling centralizer, and oil field production equipment such as the oil rod and an oil pipe is protected; underground accidents caused by breakage and falling of the oil rod are avoided, the maintenance cost is saved, the productivity of an oil well is improved, and the labor intensity of workers is reduced.

This invention belongs to the technical field of oil well drilling equipment, specifically relating to a dual-feedback multidimensional impactor. It aims to solve the problems of significantly reduced rock-breaking efficiency and increased drill bit wear when encountering hard or medium-hard coarse-grained heterogeneous rock formations during drilling. The invention includes a main body and a fluid channel disposed within the main body. The main body is arranged inside the drill bit. The fluid channel includes a fluid inlet, a jet channel, an attached-wall oscillation chamber, a first outlet, a second outlet, and a feedback channel. The fluid inlet, jet channel, attached-wall oscillation chamber, and feedback channel are arranged along the axial direction of the main body, while the first and second outlets are arranged radially. The fluid inlet, first outlet, and second outlet are connected to the outside of the main body. A mechanical feedback component is installed in the feedback channel. This invention can generate axial and radial impacts, improving operational efficiency.

The invention belongs to the technical field of oil and gas field development, and discloses a common heavy oil reservoir yield splitting method based on principal component analysis, which comprises the following steps: S1, collecting dynamic and static data in a research area; s2, according to liquid production profile data and production dynamic measure adjustment, analyzing the output condition of the small layer of the multi-layer commingling production well in the research area, and representing the output limit by using the permeability level difference and the viscosity level difference; s3, based on the output limit, first-stage splitting is conducted on the multi-layer combined producing well, and non-output layers are removed; s4, according to the production condition, static, dynamic and technological parameters related to the productivity serve as productivity influence factors, principal component analysis is conducted through SPSS software, and the main influence factors higher in productivity correlation are determined; and S5, based on the main influence factors, establishing a yield splitting model, and completing yield splitting of each output layer. According to the method, the established model is simple and effective, heavy oil reservoir development can be guided, and block reserve utilization and development benefits are remarkably improved.

The invention belongs to the technical field of oil-gas field development, and discloses a low-salinity formation water identification method, which comprises the following steps of: obtaining data corresponding to a test oil well through drilling data, and comparing step by step according to the obtained data to judge whether water is discharged from a formation; the invention further discloses a low-salinity formation water recognition device and equipment and a storage medium. The method is suitable for identifying the low-salinity formation water, whether water flows out of the formation or not is judged in real time by draining the test oil well, an important basis is provided for identifying the low-salinity formation water, and the defects of a formation water judgment method are overcome.

The utility model relates to an electromagnetic valve switch type oil well sound wave oscillation plug removal device, belongs to oil production technology technical field, including oil pipe nitrogen car, hose, oil jacket annulus blow -off groove, first pressure relief electromagnetic valve, oil pipe blow -off groove, second pressure relief electromagnetic valve, oil pipe, sleeve, one -way gas valve, electromagnetic control valve, oscillation sounder, dead plug, oil pipe nitrogen car is connected with oil pipe through hose, sleeve is sleeved in the outer wall of oil pipe, and oil pipe forms oil jacket annulus with the inner wall of sleeve, and oil jacket annulus is connected with oil jacket annulus blow -off groove through first pressure relief electromagnetic valve, and oil pipe is connected with oil pipe blow -off groove through second pressure relief electromagnetic valve, and one -way gas valve is fixed in oil pipe, and oscillation sounder is fixed on oil pipe below one -way gas valve, and the end of oil pipe is connected with dead plug, and the below of one -way gas valve and the above of oscillation sounder form control cavity, and the below of oscillation sounder and dead plug form gas storage cavity, the utility model has big energy, and the big radius of plug removal is effectively realized to the downhole plug removal.

The application discloses a method for judging the extension of the oil reservoir swept range of a microbial polymer system, and the steps are as follows: (1) taking the oil well samples in the oil reservoir before and after the microbial polymer flooding to perform the whole hydrocarbon gas chromatographic analysis of crude oil, and determining the small molecular weight light hydrocarbon marker component reflecting the change rule of the crude oil composition; (2) comparing the chromatographic peak area of the small molecular weight light hydrocarbon marker component with the chromatographic peak area of the high molecular weight carbon number, and obtaining the parameter for characterizing the effective action of the microbial polymer; (3) comparing and analyzing the crude oil samples in the oil well before and after the parameter for characterizing the effective action of the microbial polymer, and determining the swept degree of the oil reservoir by the microbial polymer. The application discloses the application of the above method in the microbial oil production for judging the swept volume of the microbial polymer in the oil reservoir.

The invention belongs to the technical field of oil well windowing, and discloses a double-layer casing windowing sidetrack drilling test device and test method. The double-layer casing windowing sidetrack drilling test device comprises an inner-layer casing, an outer-layer casing, a filler, a guide piece and a drilling piece, the outer-layer casing is arranged outside the inner-layer casing in a sleeving mode, and an oil well with the double-layer casing can be simulated; the filling space between the inner-layer sleeve and the outer-layer sleeve can be filled with the filling material, and the filling material is used for simulating a cement sheath in actual construction; the guide piece fixed in the inner hole of the inner-layer sleeve is used for simulating a whipstock; a drilling part used for simulating a milling cone can move to be in contact with the guiding inclined face of the guiding part and move to be in contact with an inner-layer sleeve, a filling material or an outer-layer sleeve under the guiding of the guiding inclined face, the drilling part can mill the inner-layer sleeve, the filling material or the outer-layer sleeve through rotation so as to open windows and drill holes in the inner-layer sleeve, the filling material and the outer-layer sleeve, and the inner-layer sleeve, the filling material and the outer-layer sleeve can be driven by the drilling part to rotate. Double-layer casing windowing sidetrack drilling is simulated on the ground, and the success rate of actual windowing sidetrack drilling is increased.