阅读说明：本技术 一种气举动力源井下涡流排液采气装置 (Gas lift power source underground vortex liquid drainage gas production device ) 是由 钟海全 郑传根 程长坤 李志伟 杜竟 许鸷宇 任呈祥 凌金权 梁道远 于 2021-07-25 设计创作，主要内容包括：本发明公开了一种气举动力源井下涡流排液采气装置。涉及天然气开采技术领域,该装置包括涡流管、圆柱滚子轴承、导流块、对中环、射流管、卡扣脚杆、脚触弹簧、封隔器、卡扣固定螺栓、卡扣脚座、卡扣脚触等构件,装置工作时,油管内气液两相在离心力作用下分层流动,将垂直向上的无序紊流转换为有序的涡流；注入气体通过气举阀进入油管内,一部分在导流块的作用下推动涡流管旋转,另一部分进入射流管,加速管内流动,在涡流装置出口处,油管径向上将形成独特的气芯－液膜－气膜流动型态,有效提升气井携液能力。装置采用卡座形式座封油管内,安装方便适用性强,大大提高排水效率进而提高天然气采收率,拥有良好的应用前景。(The invention discloses a gas lift power source underground vortex liquid drainage gas production device. The device comprises a vortex tube, a cylindrical roller bearing, a flow guide block, a centering ring, a jet tube, a buckle foot rod, a foot contact spring, a packer, a buckle fixing bolt, a buckle foot seat, a buckle foot contact and other components, wherein when the device works, gas-liquid two phases in an oil pipe flow in layers under the action of centrifugal force, and disordered turbulence vertically upwards is converted into ordered turbulence; injected gas enters the oil pipe through the gas lift valve, one part of the injected gas pushes the vortex pipe to rotate under the action of the flow guide block, the other part of the injected gas enters the jet pipe to accelerate the flow in the pipe, and a unique gas core-liquid film-gas film flow pattern is formed in the radial direction of the oil pipe at the outlet of the vortex device, so that the liquid carrying capacity of the gas well is effectively improved. The device adopts in the cassette form seat seal oil pipe, and simple to operate suitability is strong, improves drainage efficiency and then improves the natural gas recovery ratio greatly, has good application prospect.)

1. The utility model provides a gas lift power supply vortex flowing back gas production device in pit which characterized in that: the device comprises a centrifugal acceleration module, a buckle module, a jet flow acceleration module and a packing module; the centrifugal acceleration module comprises a vortex tube (1), a cylindrical roller bearing (2), a flow guide block (3), a centering ring (4), a flow guide block fixing bolt (6), an air inlet cylinder (13) and other components, the inner part and the outer part of the vortex tube (1) are both provided with spiral upward blades to form a vortex flow channel, a round channel is reserved below the vortex flow channel, is matched with the cylindrical roller bearing (2), the middle part of the flow guide block (3) is provided with a ventilation hole channel, the upper part and the lower part of the flow guide block are provided with a flow guide block air outlet (17), the side edge is provided with a flow guide block air inlet (16), the size of the baffle block is consistent with the outer diameter of the air inlet cylinder (13), the inner wall of the air inlet of the baffle block is provided with a baffle block air inlet buffer lug boss (18), the inner wall of the baffle block is provided with a baffle block fixing lug boss (19) with a threaded hole (20), 4 baffle block fixing lug bosses with threaded holes are uniformly distributed along the circumference of the inner wall of the baffle block, the centering ring (4) is positioned between the cylindrical roller bearing (2) and the jet pipe (5) and is in transition fit with the cylindrical roller bearing; the buckle module comprises components such as a buckle foot rod (7), a foot contact spring (8), a packer (9), a buckle fixing bolt (10), a buckle foot seat (11), a buckle foot contact (12) and the like, wherein the buckle foot seat (11) is fixed below the packer (9) through the buckle fixing bolt (10), a movable space is reserved in the middle of the buckle foot seat, a spring fixing hole is formed in the lower part of the movable space, the buckle foot rod (7) is connected with the buckle foot contact (12) through the foot contact spring (8), the buckle foot rod (7) is connected with the buckle foot seat (11) through a foot rod spring (25), and the buckle foot rod (7) is limited at the bottom of the movable space of the buckle foot seat (11) through the foot rod spring (25) and can rotate around the foot rod spring (25); the jet flow acceleration module comprises a jet flow pipe (5), a jet flow pipe jet flow channel (21), a cylindrical roller bearing (2), a flow guide block (3), a centering ring (4), a packer (9), an air inlet cylinder (13) and other components; the packer module comprises components such as a packer (9), a packer sealing ring (23), a pressing positioning ring (24) and the like, wherein anti-rebound sawteeth are arranged inside the pressing positioning ring (24) and outside the packer (9).

2. The gas lift power source downhole vortex liquid drainage gas production device of claim 1, wherein: the flow guide block (3) is provided with a flow guide block air inlet buffer boss (18) which divides a ground high-pressure air source into two parts, wherein an upper air source acts on the outer tube wall of the vortex tube (1) to drive the vortex tube to rotate to form a vortex, and a lower air source enters the jet tube (5) under the guiding action of the flow guide block to form jet flow.

3. The gas lift power source downhole vortex liquid drainage gas production device of claim 1, wherein: the outer wall and the inner part of the vortex tube (1) are also provided with helical blades, and helical parameters of the helical blades are consistent with helical parameters including a screw pitch, a helix angle, a helical blade shape and a linear number.

4. The gas lift power source downhole vortex liquid drainage gas production device of claim 1, wherein: jet pipe (5) shaft middle part, evenly set up 8 total 45 degrees jet pipe efflux passageway (21) of 4 x 2 along the pipe wall circumference, jet pipe export section internal diameter shrinks gradually, has jet pipe acceleration channel (22), jet pipe export section is 4 recesses of pipe wall circumference equipartition all around, passes through water conservancy diversion piece fixing bolt (6) fixed connection with water conservancy diversion piece fixed boss (19).

Technical Field

The invention relates to an underground device for improving the liquid drainage and gas production efficiency of a gas well, in particular to a device for improving the liquid carrying capacity of the gas well in the middle and later periods of a low-pressure and low-capacity gas well.

Background

Along with continuous production of natural gas, part of gas fields gradually enter the middle and later stages of development, the gas well liquid accumulation problem becomes serious day by day, and the liquid accumulation problem of the gas well cannot be solved at high efficiency and low cost because the liquid accumulation effect of the gas well with serious low-pressure and low-yield liquid accumulation is poor by a single conventional liquid-discharging gas production process, such as preferable tubular column liquid-discharging gas production, foam liquid-discharging gas production, gas-lifting liquid-discharging gas production, machine-pumping liquid-discharging gas production, jet pump liquid-discharging gas production and the like. Aiming at the current situation that the single drainage gas production process cannot meet the high-efficiency low-cost drainage gas production of a gas well, the current drainage gas production process is developed towards the direction of a deepened composite drainage gas production process, the advantages of each process can be effectively integrated, and the defect of the single process is avoided.

The technology utilizes the self energy of the stratum to form the vortex through an underground vortex tool so as to improve the liquid carrying capacity of the gas well. But the process has short acting distance for forming the vortex, the gas well needs higher energy, and for the low-pressure and low-yield liquid accumulation gas well, the self energy of the stratum is not enough to realize the vortex; the single continuous gas lift liquid drainage gas production is not suitable for low-pressure and low-yield liquid accumulation gas wells due to high back pressure to the bottom of the well. Therefore, by combining gas lift energy supplement and utilizing the modes of vortex, gas lift and high-speed gas jet, the invention provides the underground vortex liquid-discharging gas production device of the gas lift power source, the device can obviously reduce the back pressure at the bottom of a well, greatly improve the drainage and gas production efficiency of a liquid-accumulating gas well, and has wide application prospect.

Disclosure of Invention

The invention aims to solve the problems that the conventional drainage gas production process is not enough to economically and efficiently discharge formation water and accumulated liquid in a shaft due to low formation energy and productivity and obvious accumulated liquid in the shaft of a gas well during natural gas production, the drainage gas production effect is poor, and the production condition is unstable.

In order to achieve the purpose, the invention provides the following technical scheme: the gas lift power source underground vortex liquid drainage gas production device comprises a centrifugal acceleration module, a buckle module, a jet flow acceleration module and a packing module; the centrifugal accelerating module comprises a vortex tube 1, a cylindrical roller bearing 2, a flow guide block 3, a centering ring 4, a flow guide block fixing bolt 6, an air inlet cylinder 13 and other components, wherein a spiral upward blade is arranged in the vortex tube 1 to form a vortex flow channel, the outer wall of the vortex tube is also provided with a spiral blade, the spiral parameters of the spiral blade comprise a thread pitch, a spiral rising angle, a spiral blade shape, the number of lines and the like, a circular channel is reserved below the spiral upward blade and matched with the cylindrical roller bearing 2, a ventilation hole channel is reserved in the middle of the flow guide block 3, flow guide block air outlets 17 are formed in the upper and lower parts of the flow guide block, a flow guide block air inlet 16 is reserved on the side edge, the size of the flow guide block air inlet is consistent with the outer diameter of the air inlet cylinder 13, a flow guide block air inlet buffering boss 18 is arranged on the inner wall of the flow guide block, a flow guide block fixing boss 19 with a threaded hole 20 is reserved on the inner wall of the flow guide block, 4 flow guide block fixing bosses with threaded holes are uniformly distributed along the circumference of the inner wall of the flow guide block, the centering ring 4 is positioned between the cylindrical roller bearing 2 and the jet pipe 5 for transition fit; the buckle module comprises a buckle foot rod 7, a foot contact spring 8, a packer 9, a buckle fixing bolt 10, a buckle foot seat 11, a buckle foot contact 12, a foot rod spring 25 and other components, wherein the buckle foot seat 11 is fixed below the packer 9 through the buckle fixing bolt 10, a necessary moving space of the buckle foot rod, the foot rod spring, the buckle foot contact and the foot contact spring is reserved in the middle of the buckle foot seat, a foot rod spring fixing hole is formed in the lower part of the moving space, the buckle foot rod 7 is connected with the buckle foot contact 12 through the foot contact spring 8, the buckle foot rod 7 is connected with the buckle foot seat 11 through the foot rod spring 25, high-strength anti-skidding rubber is arranged at the front end of the buckle foot contact 12, and the buckle foot rod 7 is limited at the bottom of the moving space of the buckle foot seat 11 through the foot rod spring 25 and can rotate around the foot rod spring 25; the jet flow accelerating module comprises a jet flow pipe 5, a jet flow pipe jet flow channel 21, a jet flow pipe accelerating channel 22, a cylindrical roller bearing 2, a flow guide block 3, a centering ring 4, a packer 9, an air inlet cylinder 13 and other components, wherein the middle part of a pipe body of the jet flow pipe is uniformly provided with 8 45-degree jet flow pipe jet flow channels 21 with the diameter of 4 multiplied by 2 along the circumference of the pipe wall, the inner diameter of an outlet section of the jet flow pipe is gradually contracted, the jet flow pipe accelerating channel 22 is arranged, 4 grooves are uniformly distributed around the outlet section of the jet flow pipe along the circumference of the pipe wall, and the jet flow accelerating module is fixedly connected with a flow guide block fixing boss 19 through a flow guide block fixing bolt 6; the packer module comprises a packer 9, a packer sealing ring 23, a pressing positioning ring 24 and other members, wherein anti-rebound sawteeth are arranged inside the pressing positioning ring 24 and outside the packer 9, and the packer sealing ring 23 is in interference fit with the pressing positioning ring 24.

Preferably, the flow guide block 3 is provided with a flow guide block air inlet buffer boss 18, the ground high-pressure air source is divided into two parts, wherein the upper air source acts on the outer pipe wall of the vortex tube to drive the vortex tube to rotate to form a vortex drainage gas production process, and the lower air source enters the jet tube under the guiding action of the flow guide block to form a jet drainage gas production process.

Preferably, the outer wall and the inner part of the vortex tube 1 are also provided with helical blades, helical parameters of the helical blades comprise a helical pitch, a helical lead angle, a helical blade shape, a linear number and the like, a gas-liquid centrifugal area is formed in the vortex tube, gas-liquid two-phase flow passes through the centrifugal area, and a unique gas core-liquid film-gas film three-layer structure area is formed because the liquid density of the gas-liquid two-phase flow is greater than that of gas and gas is separated from the gas and a high-speed gas film is wrapped outside.

Preferably, 5 body middle parts of the efflux pipe 5 evenly set up 8 efflux pipe jet flow channels 21 of 45 inclinations altogether of 4 x 2 along the pipe wall circumference, efflux pipe export section internal diameter shrinks gradually, is equipped with efflux pipe acceleration channel 22, because the air around is rolled away by the efflux at efflux pipe acceleration channel 22 entrance and forms the vacuum for the air water mixture of low-speed in the oil pipe is under high-speed gas effect, jets out in coordination, accelerates the flowing back effect.

Preferably, the locking leg 7 is rotatable about the locking leg, the device is lowered into the desired position by means of a wire, the force of the tightening spring to the center is cut off, and the locking leg is outwardly sprung under the action of the moment of the foot contact spring and the leg spring.

Preferably, the buckle foot touch 12 front ends be equipped with high strength anti-skidding rubber, buckle foot pole pops out, extrudes the buckle foot and touches front end high strength anti-skidding rubber and oil pipe tightly contact, realizes fixedly.

Preferably, the pressing positioning ring moves downwards under high-pressure airflow to extrude the packer sealing ring 23 to deform and seal, setting is realized, and the anti-rebound sawteeth are arranged inside the pressing positioning ring 24 and outside the packer 9, so that the packer sealing ring is prevented from deforming again.

The invention has the following technical effects and advantages: the invention discloses a gas lift power source underground vortex liquid drainage gas production device by combining a gas lift liquid drainage gas production process, an underground vortex liquid drainage gas production process and a jet flow water drainage gas production process. The invention is based on the gas lift mining technology, high-speed and high-pressure gas is injected into the hollow part of the oil sleeve, the injected gas flows into the oil pipe through the gas lift valve, and under the action of the flow guide block, the injected gas is divided into two parts, one part is upward and the other part is downward. The downward injected gas can only flow through the annular space of the oil pipe, the jet pipe jet flow channel and the jet pipe acceleration channel due to the existence of the packer, the jet flow is carried out to the jet pipe through the jet pipe jet flow channel, the vacuum is formed at the inlet of the jet pipe acceleration channel due to the fact that the surrounding air is entrained by the jet flow, so that the gas-water mixture at low speed in the oil pipe is ejected out in a synergistic mode under the action of high-speed gas, the liquid-discharging and liquid-carrying capacity effect is improved, the mixed fluid flows upwards through the jet pipe acceleration channel, the fluid flow rate is further increased, the vortex pipe section at the part which flows upwards is rapidly generated under the special structure of the vortex pipe, and the liquid discharge of a gas well is carried out based on the vortex liquid discharge principle. Meanwhile, upward injected gas passes through the annular space of the vortex tube and the oil tube, the vortex tube is pushed to rotate under the action of the synchronous spiral sheet, the centrifugal acting force is further increased, and the fluid form of annular space fluid is converted into vortex under the action of the spiral sheet outside the vortex tube, so that a vortex gas film is formed. At the uppermost part of the device, namely the outlet of the vortex tube, a three-layer structure of an air core, a liquid film and an air film is generated, and the middle liquid film is clamped by the high-speed air core and the air film to flow, so that the viscous resistance of the liquid phase of the traditional vortex tube on an oil pipe is effectively avoided, and the liquid carrying capacity of a shaft is increased.

The device combines three drainage gas production processes of jet flow, vortex flow and gas lift, greatly improves drainage gas production efficiency, can implement drainage gas production of the gas well under the condition of high liquid loading of the gas well, and has good application prospect and effect.

Drawings

FIG. 1 is a schematic structural view of an underground vortex liquid-discharging gas production device with a gas lift power source according to the present invention;

FIG. 2 is a schematic diagram of the gas lift power source downhole vortex liquid drainage gas production device working in an oil pipe;

FIG. 3 is a bottom view of the gas lift power source downhole vortex liquid drainage gas production device;

FIG. 4 is a full sectional view A-A of the gas lift power source downhole vortex liquid drainage gas production device;

FIG. 5 is a schematic diagram of the operation of a buckle module in the downhole vortex fluid drainage gas production device with a gas lift power source;

FIG. 6 is a schematic view of a structure of a flow guide block in the downhole vortex liquid drainage gas production device with a gas lift power source;

in the figure: 1. a vortex tube; 2. a cylindrical roller bearing; 3. a flow guide block; 4. a centering ring; 5. a jet pipe; 6. the guide block is fixed by a bolt; 7. buckling a foot bar; 8. a foot-contact spring; 9. a packer; 10. fastening a fixing bolt; 11. a fastening foot seat; 12. the buckle is contacted with the foot; 13. an air inlet cylinder; 14. an oil pipe; 15. a gas lift valve; 16. a flow guide block air inlet; 17. an air outlet of the flow guide block; 18. the air inlet buffering boss of the flow guide block; 19. the guide block fixes the boss; 20. the guide block fixes the boss threaded hole; 21. a jet pipe jet channel; 22. a jet pipe acceleration channel; 23. a packer sealing ring; 24. pressing the positioning ring; 25. a foot lever spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is described in detail below with reference to the accompanying drawings. As shown in the figure, the invention mainly comprises the following components: 1 vortex tube, 2 cylindrical roller bearing, 3 water conservancy diversion pieces, 4 centering rings, 5 efflux pipe, 6 water conservancy diversion piece fixing bolt, 7 buckle foot bars, 8 feet touch the spring, 9 packers, 10 buckle fixing bolt, 11 buckle footstands, 12 buckle feet touch, 13 air inlet cylinders, 16 water conservancy diversion piece air inlets, 17 water conservancy diversion piece gas outlets, 18 water conservancy diversion piece buffering boss that admits air, 19 fixed boss of water conservancy diversion piece, 20 fixed boss screw holes of water conservancy diversion piece, 21 efflux pipe jet flow channel, 22 efflux pipe acceleration channel, 23 packer sealing rings, 24 pressure move the position circle, parts such as 25 foot bar springs constitute, its concrete operating procedure is as follows:

1. and (6) assembling. As shown in fig. 4, the vortex tube 1 and the deflector block 3 are centered on the central axis by the centering ring 4, and the cylindrical roller bearing 2 is installed outside the centering ring 4; the jet pipe 5 is arranged from the lower part of the flow guide block 3, an air inlet cylinder 13 is arranged, and the flow guide block fixing bolt 6 is used for realizing the fixation; the buckle foot rod 7 is connected with the buckle foot contact 12 through a foot contact spring 8, the buckle foot rod 7 is fixed in the activity space of the buckle foot seat 11 through a foot rod spring 25, and the buckle foot seat 11 is connected with the packer 9 through a buckle fixing bolt 10.

2. And (4) throwing. Tighten buckle foot pole 7 through the iron wire, go into the expectation and act on the position down, cut off and tighten the spring to the power at center, touch the moment effect of spring and foot pole spring at the foot under, buckle foot pole outwards pops out, and the extrusion buckle foot touches, and the buckle foot touches the front end and is equipped with high strength anti-skidding rubber, can tightly fix with oil pipe, like fig. 5.

3. And (3) completing the installation work of the equipment, and setting, wherein as shown in figure 2, the pressing positioning ring moves downwards under high-pressure airflow to extrude the sealing ring of the packer to deform and seal, so that setting is realized.

4. The gas lift drainage gas production process is carried out, and the device works stably.

The working principle is as follows: after entering the gas injection valve, the gas lift injection gas is divided into two parts under the shunting action of the flow guide block, one part of the injection gas flows upwards along the flow guide block to enter the oil pipe and is mixed with the fluid in the shaft, the density of the mixed liquid in the shaft is reduced by utilizing the expansion of the gas, the accumulated liquid in the shaft is lifted to the ground, meanwhile, the upward gas passes through the annular space of the vortex tube and the oil pipe, and under the action of the synchronous spiral sheet, the vortex tube is pushed to rotate, and the centrifugal acting force of the turbine is increased; the other part of the injected gas flows downwards along the flow deflector and enters the vortex liquid drainage device, the injected gas and the fluid produced by the stratum are converged at the front end of the jet pipe and enter the incident jet pipe together, the injected gas and the fluid produced by the stratum are accelerated in the jet pipe due to the jet effect generated by the special structure of the jet pipe, high-speed mixed fluid is formed at the tail end of the jet pipe, the mixed fluid flows upwards and passes through the reducing section at the bearing, the flow rate of the fluid is further increased, and then the mixed fluid continues to flow to the upward part of the vortex pipe section. Under the intraductal special structure of vortex, after the two-phase turbulent mixture of irregular gas-liquid gets into this instrument, make the fluid rotate fast, make heavier liquid get rid of to the pipe wall flow owing to centrifugal action, lighter gas then flows in the middle of the pipe, and the final flow state changes the laminar flow that the resistance is little to upwards propagate and maintain longer distance, thereby reduced the flow friction and hindered and can carry more liquid, improve the drainage gas recovery ability of gas well.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.