104 results about "Production string" patented technology

The invention relates to the technical field of oil and gas field development, in particular to an ultra-deep gas well production string multi-mode leakage simulation experiment device and method. According to the technical scheme, the outer side of a shaft temperature and pressure coupling simulation system is connected with a reservoir gas supply simulation system, the middle of the shaft temperature and pressure coupling simulation system is provided with a multi-mode leakage simulation assembly, the lower end of a production oil pipe is connected with a reservoir-shaft coupling connector, and the upper portion of one side of a layered sand filling seepage tank of the reservoir gas supply simulation system is connected with a confining pressure loading unit through a pipeline; the lower portion of the layered sand filling seepage tank is connected with a reservoir fluid supply unit, and the outlet end of the layered sand filling seepage tank is connected with a reservoir-shaft coupling connector through a pipeline. The experimental device has the beneficial effects that the experimental device for coupling the reservoir and the shaft is constructed, and the multi-mode leakage simulation assembly is adopted to realize body perforation leakage simulation and screw thread sealing failure simulation, so that the simulation of the ultra-deep gas well under complex working conditions is realized, and a scientific basis and a technical support are provided for leakage prevention and control of a production string of the ultra-deep gas well.

The invention relates to a production string leakage positioning method. The method comprises the steps that an initial pressure stable value of an oil sleeve annulus and a pressure fluctuation value of the oil sleeve annulus are obtained; calculating a pressure fluctuation threshold value of the oil jacket annulus according to the initial pressure stable value and the sensor monitoring error; the pressure fluctuation value is compared with a pressure fluctuation threshold value, and whether a new leakage point appears or not is judged; if no new leakage point appears, the depth of the leakage point is calculated according to the U-shaped pipe pressure balance principle, and a positioning result is obtained; and operating oil pressure fluctuation based on a positioning result to obtain an oil pressure fluctuation calculation value, and comparing the oil pressure fluctuation calculation value with an actually-monitored oil pressure fluctuation monitoring value to judge the positioning reliability. According to the method, the leakage point position is determined and the positioning result is verified by judging the state of the leakage point of the production pipe column in advance, so that the positioning precision is improved, the leakage pressure rising phenomenon of the production pipe column is effectively controlled, and the working efficiency is improved.

The present invention addresses to a method of removing scale from the DHSV of the oil production string aiming at maintaining the production of the wells and thus avoiding the loss of production. First, a neutralizing solution is placed in the service line, before pumping the scale removing solution through the string to act on the DHSV. Next, the acid is pumped into the production string to react with the calcium carbonate scale. After the time for the dissolution of the scale inside the DHSV, the well is opened for production by the service line. The spent acid is mixed with the neutralizing solution inside the service line, reducing its corrosiveness in relation to the service line, contributing to its preservation.

The invention relates to the technical field of petroleum separate recovery, in particular to an under-pump interactive intelligent separate recovery system and an implementation method thereof. The method comprises the steps that firstly, at least one bottom-hole regulator packing assembly, an electric energy interaction receiving end and a releasing anchor are sequentially arranged from bottom to top through a tubular column; secondly, after a wellhead is pressed and a packer is set, all production layers are packed; the wellhead continues to be pressurized, the releasing anchor conducts releasing anchoring to achieve anchoring of the production allocation tubular column, then the releasing anchor conducts releasing disengaging to achieve hanging of the production allocation tubular column, and at the moment, the releasing anchor is pulled out so that the tubular column can be released; thirdly, the electric energy interaction transmitting end, the electric submersible pump and the oil pipe telescopic adjuster are sequentially connected from bottom to top; when the production tubular column is slowly lowered and the lowering position approaches to the butt joint position of the electric energy interaction transmitting end and the electric energy interaction receiving end, a wellhead oil pipe telescopic adjuster is adjusted through a ground controller, so that a wellhead oil pipe has the well completion length, and meanwhile, the hanging load of the pump hanging tubular column is controlled to meet the axial load capable of being borne by the electric submersible pump.

The present application relates to the technical field of deep well natural gas exploitation, and particularly relates to an oil and foam removal separation device and a use method. The device comprises an inertial separator and a cyclone sand remover. The inertial separator comprises an inertial chamber, a conical tube and a gas distribution cone. The conical tube is located in the inertial chamber, the uphole section of the production string penetrates the bottom plate of the inertial chamber and is fixedly connected with the small end of the conical tube. The tip of the gas distribution cone is inserted into the large end of the conical tube, and there is a gap between the conical surface of the gas distribution cone and the inner wall of the conical tube. The other end of the gas distribution cone is provided with a connecting part which is fixedly connected to the top plate of the inertial chamber. The gas inlet pipe of the cyclone sand remover penetrates the top plate and is connected to the side of the connecting part which is towards the inside of the gas distribution cone. The device can avoid the rock and soil debris from entering the cyclone sand remover, thereby avoiding the impact damage of the rock and soil debris to the cyclone sand remover, and can also realize the continuous exploitation and separation of the deep well raw gas.

The application provides a wellbore safety experiment device and method for electric heating in-situ exploitation of oil shale, and the wellbore safety experiment device comprises a thermal insulation layer, a simulated injection-production assembly arranged outside the thermal insulation layer, and oil shale raw rock, a simulated wellbore assembly, a simulated production pipe column assembly and a first stress collection assembly arranged in the thermal insulation layer. The sealed cavity is heated by an electric heater, heat is transmitted to the oil shale raw rock through the oil pipe, the casing and the closed wellbore, the cracked product of the oil shale raw rock after being heated and cracked flows into the oil pipe through the product channel, the cracked product in the oil pipe is collected through the simulated injection-production assembly, the temperature in the oil pipe is collected through the first temperature sensor, the stress borne by the casing and the oil pipe at different positions is collected in real time through the first stress collection assembly, the real downhole in-situ exploitation process is simulated, the safety of the casing and the oil pipe can be evaluated in advance before downhole exploitation, and the safety and reliability of the casing and the oil pipe during downhole exploitation can be ensured.

The invention relates to an oil well intelligent separate production system based on flow wave coding control and an implementation method.The oil well intelligent separate production system based on flow wave coding control comprises a plurality of intelligent separate production devices and packers which are alternately arranged in the axial direction of an oil well, and the intelligent separate production devices and the packers are connected through production pipe columns; the production pipe column is connected with an oil conveying pipeline, and the oil conveying pipeline is provided with a flow wave generator used for generating flow fluctuation of a certain rule. The flow generator is adopted to generate the regular flow waves, the valve opening degree of the intelligent separate recovery device is wirelessly controlled through the regular flow waves, allocation is performed according to the water outlet condition of each oil layer, the opening degree of the bottom-hole regulator corresponding to each production layer is controllably adjusted, and therefore fine adjustment and control of the liquid production capacity are achieved, the construction process is simple, and the cost is low. The working intensity is reduced, the construction cost of an oil well is reduced, and the crude oil exploitation efficiency is improved.

The present invention discloses an integrated system for heavy oil injection and production by using a small oil pipe to launch and salvage an electric pump, comprising an outer heat injection string and an inner production string, wherein the production string comprises a small oil pipe, an electric submersible pump connector, and an inverted electric submersible pump from top to bottom, and the electric submersible pump connector is provided with a second guide flow hole. The present application involves less ground operation equipment, high operation efficiency, and saves operation resources and costs; a small oil pipe is selected as the output fluid output channel to avoid fluid immersion and scouring in the annulus between the inner production string and the outer heat injection string, thereby protecting the thermal insulation performance of the insulated oil pipe and the insulation performance of the cable, and reducing the risk of failure; the electric submersible pump unit adopts an inverted pump design, and the cable is directly connected to the electric submersible pump motor after passing through the upper production packer, reducing the risk of cable crushing and improving the operating stability of the electric submersible pump in highly deviated wells; the small oil pipe has a strong launching and salvaging capability, and can realize launching and salvaging of the electric submersible pump in highly deviated wells and horizontal wells.

The invention relates to the technical field of oil pipe cutting, and discloses an anchoring shoe type production pipe column inner cutting tool which comprises a shell, an anchoring assembly, an unfolding assembly, a rotating assembly and a tool bit assembly. The cutter head assembly comprises a cutter disc, a central gear and a plurality of cutting knife mechanisms which are uniformly distributed on the circumference, each cutting knife mechanism comprises a cutter and a planetary gear, the rotating assembly comprises a rotating motor, a spiral spline cylinder and a driving cylinder, the unfolding assembly comprises an unfolding motor, an unfolding screw rod, an unfolding seat and a spiral spline shaft, and the anchoring assembly comprises an anchoring driving mechanism and two anchoring mechanisms. The anchoring mechanism comprises an anchoring cylinder and a plurality of anchoring pieces which are evenly distributed in the circumferential direction. Each anchoring piece comprises a fixed part, a movable part and an anchoring shoe. The anchoring shoe type cutting tool in the production pipe column is compact in structure, mechanical cutting operation of a seriously-scaled oil pipe of a small-pipe-diameter oil well can be achieved, and the problem that the cutting process is unstable due to mechanical shaking can be effectively solved.

The invention relates to a three-dimensional heterogeneous formation water control oil extraction multi-parameter synchronous simulation experiment device which comprises a device body, a plug, a production pipe column and a sensor unit. The device body is of a coaxial multi-layer nested structure, a plurality of independent simulation units are constructed in an internal annular sand filling area through replaceable sieve pore partition plates, and heterogeneous stratum reconstruction of fluid communication and sand body isolation is achieved. The production pipe column adopts a modular water control short section series connection structure, a replaceable fluid sensitive valve and a tracer agent storage cabin are integrated, and performance evaluation and fluid traceability of multiple types of water control tools are achieved; the sensor unit synchronously acquires outlet, wall surface and radial gradient pressure through three-dimensional arrangement of mandrels with various lengths, and realizes multi-dimensional data collaborative analysis in combination with flow and water content monitoring. The problems that an existing device is difficult to restore complex fluid channeling physical characteristics and is single in monitoring dimension are solved, full-process high-fidelity simulation from stratum seepage to tool water control is achieved, and key technical support is provided for water control strategy optimization.

A gravel pack production string component of a production string used for a gravel pack operation may include a body having a wall that forms a cavity, and also may include a gravel load disposed around an outer surface of the wall of the body. The gravel pack production string component may also include a gravel containment apparatus that is configured to secure the gravel load against the outer surface of the wall of the body as the gravel pack production string component is inserted into a wellbore. The gravel pack production string component may further include a release mechanism that is configured to release the gravel load from the gravel containment apparatus after the gravel pack production string component is positioned within the wellbore for the gravel pack operation and when the release mechanism interacts with a release agent.

The present application relates to a production string for oil development and a use method, in particular to a multi-layer real-time separate layer measurement and control safety production string for offshore oilfield. The production string comprises an electric pump overhang cylinder, an electric pump unit, an electric pump cable, a signal cable, a safety valve, a cable through packer, a hydraulic transmission joint, a check valve, a hydraulic drainage device, a plurality of compression type packers, a plurality of measurement and control devices, a tubing, a plug, and a pressure transmission pipeline. The production string has the advantages of realizing the multi-layer real-time separate layer measurement and control function of the electric pump lifting well in the offshore oilfield, improving the utilization efficiency of the oil well, overcoming the problem that the large-scale electric pump lifting well in the offshore application cannot realize the hanging of the separate layer string and the setting of the compression type packer to realize the separate layer, and has a wide application range.

This invention relates to a smart stratified injection-production string for carbon dioxide injection, comprising a first tubing and a second tubing connected by a backwash valve or a release tool. A hydraulic feedback pump is installed on the first tubing, and several packers are installed at intervals on the second tubing. A smart control switch tool is installed between two adjacent packers, each corresponding to an oil layer. An anchoring tool is also installed on the second tubing. This invention enables stratified injection, well shut-in, well release, and stratified production of carbon dioxide in any one or more layers without moving the injection-production string. This effectively improves the effective utilization rate of carbon dioxide, the degree of oil layer utilization, and the injection-production conversion efficiency, thereby increasing injection-production efficiency and oil recovery rate, reducing well workover work, well occupation time, and well cleaning and well layer contamination, and lowering operating costs.

The invention discloses an unconventional natural gas horizontal well sectional synchronous injection and production energy supplement replacement method, and relates to the technical field of unconventional natural gas exploitation, which comprises the following steps: after perforation fracturing is performed on a horizontal section sleeve of an unconventional natural gas horizontal well, a plurality of packers are used for dividing the horizontal section sleeve into a plurality of horizontal packing sections; the side wall of each horizontal packing section comprises a perforation hole and an artificial fracturing crack network communicated with the perforation hole; the horizontal packing sections are divided into a plurality of gas injection sections and a plurality of gas production sections, the gas injection sections are sequentially connected through gas injection pipe columns, and the gas production sections are sequentially connected through gas production pipe columns; the gas injection sections and the gas production sections are arranged at intervals; carbon dioxide gas is injected into the multiple gas injection sections so that the carbon dioxide gas can replace and displace the methane gas through the artificial fracturing fracture network; and the methane gas obtained through replacement and displacement is extracted through the multiple gas extraction sections. The technical problem that in the prior art, the recovery efficiency improvement range of the unconventional natural gas reservoir is limited is solved.

The application relates to a recoverable adjustable layered injection-production pipe column for offshore thermal recovery wells and a use method thereof, wherein the injection-production pipe column comprises a plurality of pipe column assemblies connected in sequence from top to bottom, packers, a tail-end tubing and a bottom plug; each pipe column assembly comprises a first tubing, a prefabricated working barrel, an adjustable injection-production core, a second tubing and a reverse circulation production valve; the upper end of the prefabricated working barrel is connected with the first tubing, and the lower end thereof is connected with the upper end of the second tubing; the lower end of the second tubing is connected with the reverse circulation production valve; the adjustable injection-production core is arranged in the prefabricated working barrel; the first tubing in each pipe column assembly is connected with a packer; the first tubing of the uppermost pipe column assembly is connected with a wellhead of a wellbore; the bottom of the reverse circulation production valve in the lowermost pipe column assembly is connected with the tail-end tubing, and the bottom plug is arranged at the bottom of the tail-end tubing; wherein the prefabricated working barrel and the adjustable injection-production core cooperate to guide part of steam injected from the wellhead into a stratum.

The present application relates to a kind of bridge plug with self-sealing capability, including setting structure, bridge plug body and rupture disc structure, setting structure is arranged in the upper end of bridge plug body, and setting mechanism can move downward along the axial direction of bridge plug body, the bottom end of bridge plug body is equipped with rupture disc structure, and rupture disc structure realizes the self-sealing of bridge plug.The present application realizes bridge plug self-sealing and rapid unsealing, effectively solves the problems of wellbore plugging and rapid unsealing when production string is run in production, has the advantages of fast sealing establishment, unsealing, high sealing performance, convenient operation, safety, reliability and good economy.

The application discloses a cable-through packer setting auxiliary tool, which comprises an upper joint, a sealing ball, a ball seat and a lower joint, the upper joint is sequentially connected with an outer protection pipe and the lower joint, the ball seat is fixed in the outer protection pipe through a constant-pressure shear pin, and the sealing ball is arranged between a limiting plate in the outer protection pipe and the ball seat; flow grooves are arranged in the limiting plate, the outer protection pipe, the ball seat and the lower joint, and the sealing ball is a soluble metal ball; and the cable-through packer setting auxiliary tool is connected in a production pipe string below the cable-through packer. The cable-through packer setting auxiliary tool is connected in the production pipe string through the upper joint and the lower joint, and the connection is simple, convenient to operate and in line with offshore well control requirements. After well completion, if immediate production is needed, the cable-through packer connected in the production pipe string can be directly set by pressing the well mouth, the setting process and setting construction time of the cable-through packer are reduced and shortened, the time of the marine platform occupied by the cable-through packer setting construction is saved, the construction efficiency is improved, and the production cost is reduced.

The invention relates to an electric pump and gas lift combined lifting separate production pipe column which comprises an upper production pipe column body used for oil production through electric pump lifting and / or oil production through gas lift production. The upper production pipe column is connected with the lower partial production pipe column through the underground communication controller, and the lower partial production pipe column is used for dividing an oil layer where the lower partial production pipe column is located into production layers, collecting production information of the production layers and sending the collected production information to the ground system through the underground communication controller. The ground system can make a corresponding mining quantity instruction according to the mining information; the underground communication controller is used for sending a mining quantity instruction to the lower mining pipe column and supplying power to the lower mining pipe column, and the lower mining pipe column is further used for controlling the mining quantity of each production layer according to the mining quantity instruction issued by the underground communication controller. The aims of exerting the productivity of the oil well to a large extent and improving the overall development effect of the oil well are achieved, and then the productivity of the oil well is fully exerted.

A valve system controls flow into a downhole production string, and which includes a downhole valve with a port formed in a sidewall of a production string disposed in a wellbore, and a sleeve that is slidable along the production string to block or allow flow through the port. An actuator assembly exerts a sliding force onto the sleeve, and is made up of multiple actuators arranged along an outer surface of the production string. Each actuator has an electrically powered motor and a stem connected to the motor. An opposite end of each stem connects to an end of the sleeve. Energizing the motors causes linear movement of the stems and connected sleeve to open and close the valve.

The application discloses a kind of well down pipe string erosion risk assessment method based on gas field production parameters, comprising the following steps, step 1, based on the relationship between the deformation wear amount, cutting wear amount and particle impact load of parent material, the production situation is established;Step 2, based on the production pipe string structure, the gas-solid erosion prediction model of production pipe string is established, and the grid-independent solution is obtained;Step 3, according to the relationship between the deformation wear amount, cutting wear amount and particle impact load in step 1, the gas-solid erosion prediction model is optimized to the error within 5% range;Step 4, based on the direct relationship between the optimized gas-solid erosion prediction model and production parameters, determine the production parameters corresponding to the erosion degree;Step 5, establish three-dimensional critical production parameter chart containing yield, pressure, sand production, according to the production parameters in step 4, erosion risk assessment is carried out on production pipe string of different materials.

The present invention seeks to solve the problem of hydraulic discontinuity by combining two approaches. It promotes the reduction of fluid density, via dilution of the inhibitor product with a water-based fluid, as well as increasing the fluid flow rate. The first approach reduces the hydrostatic gradient in the injection line, and the second approach increases the pressure drop due to friction in the line. Combined phenomena that prevent hydraulic discontinuity of the injection.To this end, the present invention adds to the surface equipment an assembly of an industrial water tank, pump and a line junction (flow T). This assembly will be responsible for diluting the inhibitor in the injection line, ensuring the minimum inhibitory concentration.

The utility model provides a permanent distributed optical fiber deployment device for an oil and gas well. The device comprises a well bottom far end, an oil pipe middle part and a well mouth near end, the well bottom far end comprises an oil pipe and a downward-entering optical cable which are arranged in a sleeve, the lower portion of the oil pipe is connected with a punching pipe, the chamfering portion of the chamfering oil pipe is inserted into a through hole of a round plug with a hole, pressure meter supporting cylinders are arranged at different positions of the oil pipe, and the pressure meter supporting cylinders are connected with the downward-entering optical cable; an optical cable protector is arranged in the middle of the oil pipe, the wellhead near end comprises an oil pumping unit pump assembly and a cable passing packer, the oil pumping unit pump assembly is connected with the upper portion of the oil pipe, and the cable passing packer is arranged on the lower portion of the oil pipe. The cable passing packer is used for sealing an oil pipe and enabling a cable to pass through, and a penetrating sealing assembly is arranged on one side of the cable passing packer. Through combined use of the optical fiber protector, the coupler and other devices and a production pipe column, not only are safe tripping-in and long-term stable working states of distributed optical fibers realized, but also random matching and combination of testing tools such as an underground pressure gauge and the like are realized.

The present application relates to a kind of plugging water drive oilfield perforation completion horizontal well fracturing main fracture plug type chemical water shutoff process.Mainly solve the problem that existing water shutoff control water mode cannot plug perforation completion fracturing horizontal well water breakthrough fracture.It includes the following steps:1) preferably chemical water shutoff target horizontal well;Lower into construction pipe column;2) determine to inject three plugs and the chemical plugging agent dosage of each plug;3) sequentially inject first plug, second plug, third plug chemical plugging agent;4) inject polyacrylamide polymer solution to displace, until chemical plugging agent is extrapolated to 5-10 meters outside perforation gun;5) shut-in waiting for 48-72 hours;6) verify process effectiveness;7) lift construction pipe column, lower into production pipe column and normally produce.The chemical water shutoff process can effectively plug the high water cut fracturing main fracture of horizontal well, while protecting the oil flow channel established by fracturing branch crack, increase the flow distance of injected water, expand water drive sweep range.

The present application relates to the technical field of oil and gas exploitation, and particularly relates to a kind of ultra-deep production string leakage detection system and method.The technical scheme is: through production string pressure detection unit and annulus pressure detection unit, real-time pressure data is obtained, and through first electric throttle control valve and second electric throttle control valve, the pressure of string side and annulus side is adjusted, so that wellbore forms controllable differential pressure condition under the premise of meeting safety conditions;The downhole detection sub is connected by armored cable and lowered into the production string, moves in the direction of well depth for continuous detection or fixed-point detection, and the multi-band signals detected are gathered through data transmission sub and then uploaded to the ground control and analysis system to complete the processing of detection data analysis and leakage result output.The present application improves the accuracy, stability and engineering applicability of leakage type, leakage location and leakage intensity discrimination, and provides technical support for ultra-deep gas well production string leakage diagnosis, workover decision and wellbore integrity management.

This application provides a shot-and-penetrate production string, comprising a tubing string, a first screen pipe, a self-sealing device, a differential pressure normally open valve, a second screen pipe, and a perforating gun connected in sequence. The self-sealing device has a cup fitted on its outer wall, with the outer diameter of the cup closer to the first screen pipe being larger than the outer diameter of the cup further away. The cup is adapted to fit against the inner wall of the wellbore and divide the annulus into an upper and lower zone. The cup allows fluid to enter the upper zone from the lower zone and prevents fluid from entering the lower zone from the upper zone. The differential pressure normally open valve closes when fluid is introduced from the tubing string, thereby preventing fluid from entering the lower zone within the shot-and-penetrate production string. Through this configuration, the internal and external actions of the cup and the differential pressure normally open valve jointly protect the oil layer from contamination by well-washing fluids and other liquids within the shot-and-penetrate production string.

The invention relates to the technical field of deep well natural gas extraction, in particular to a deoiling and defoaming separation device and a using method. The device comprises an inertia separator and a cyclone desander, the inertia separator comprises an inertia chamber, a taper pipe and a gas distribution cone; the taper pipe is located in the inertia chamber, and the ground section of a production pipe column penetrates through a bottom plate of the inertia chamber and is fixedly connected with the small end of the taper pipe. The tip end of the gas distribution cone is inserted into the large end of the taper pipe, and a gap exists between the conical surface of the gas distribution cone and the inner wall of the taper pipe; a connecting part is arranged at the other end of the gas distribution cone and is fixedly connected to a top plate of the inertia chamber; and an air inlet pipe of the cyclone desander penetrates through the top plate and is communicated to one side, facing the interior of the air distribution cone, of the connecting part. The rock-soil disintegrating slag can be prevented from entering the cyclone desander, so that impact damage to the cyclone desander by the rock-soil disintegrating slag is avoided, and continuous exploitation and separation work of raw gas in a deep well can be realized.

The invention discloses an operation method for converting self-spraying of an offshore oil and gas well production pipe column into pumping, and relates to the technical field of oil and gas well extraction equipment. The self-sealing pump cylinder is composed of a pump cylinder upper outer cylinder, two self-sealing pieces, a locking ring, a middle pump cylinder, an overflowing pump cylinder, a lower pump cylinder, an anchoring pawl cylinder, a lower self-sealing outer cylinder, a ball seat, an overflowing check ring and a steel ball. The pump cylinder sections are sequentially connected from top to bottom. A self-sealing piece is limited through a locking ring, a lower self-sealing outer barrel is matched with the conical surface of an anchoring pawl barrel, underground pressing can synchronously achieve packing and anchoring, a pump core can be installed in an input mode, an original self-spraying pipe column does not need to be pulled out, operation is convenient and fast, packing and anchoring are reliable, and the self-sealing device is suitable for self-spraying-to-pumping operation of an offshore oil and gas well.

A production string includes one or more segments each including a solid core defining a plurality of non-intersecting production conduits. Flow through the conduits can be selected such that, as a first instance, substantially all of the fluid flowing from the subterranean zone to the surface location is permitted to flow through one or more of the plurality of production conduits. In response to a liquid loading event, as a second instance, flow is prevented through at least one of the plurality of production conduits, such that a total cross-sectional area of the production conduits in the second instance is less than a total cross-sectional area of the production conduits in the first instance.

The present application relates to a liquid accumulation-free production and drainage system for oil and gas well, including a casing and a production string, and the casing is arranged in the oil and gas well, and the bottom of the casing is inserted below the oil and gas liquid level, the production string is arranged in the casing, so that an annular gap is formed between the casings and the production string. The production string is formed by connecting a plurality of oil and gas pipes, a plurality of anti-skid liquid accumulators and a plurality of anti-skid gas injectors end to end, one of the anti-skid liquid accumulators or one of the anti-skid gas injectors is arranged at intervals of several of the oil and gas pipes and and one of the anti-skid gas injectors is arranged at intervals of several of the anti-skid liquid accumulators.

This invention belongs to the field of oil and gas field development technology, and discloses an intelligent production process string and implementation method suitable for small wellbores. The intelligent production process string includes: a sand control string, including a sand control screen located in the open hole section, a sand control top packer located at the front end of the sand control screen, and at least one open hole segment sand control packer for segmenting the open hole section to form multiple sub-open hole sections; a production string, including at least a production distributor located in each sub-open hole section, an electrically controlled setting packer that sets and cooperates with the open hole segment sand control packer and is connected to the adjacent production distributor, a lower intelligent node connected to the foremost production distributor, and a drop tool connected to the lower intelligent node; and a production string, including at least an upper intelligent node and an electric submersible pump connected sequentially from bottom to top. The upper intelligent node is connected to the surface control device via a first steel pipe cable, the production distributor is connected to the lower intelligent node via a second steel pipe cable, and the upper intelligent node is magnetically coupled to the lower intelligent node through the drop tool.