CN210622775U

CN210622775U - A salvageable downhole choke based on magnetorheological elastic rubber with adjustable air nozzle

Info

Publication number: CN210622775U
Application number: CN201921695772.6U
Authority: CN
Inventors: 王治国; 蔺靖杰; 宋金朋; 屈航
Original assignee: Xian Shiyou University
Current assignee: Xian Shiyou University
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-05-26
Anticipated expiration: 2029-10-11

Abstract

An air faucet adjustable salvageable downhole choke based on magnetorheological elastic rubber comprises a throwing head, wherein the throwing head is connected with a positioning ring, an inner ring of the positioning ring is connected with an oil pipe, the oil pipe penetrates through a fishing neck, a slip, a conical seat and a magnetorheological elastic rubber sealing rubber tube, and an air faucet is arranged at the end of the oil pipe; the air tap is internally provided with a spring and a small ball which can move up and down, and the flow of the fluid flowing through the air tap can be adjusted; the magnetorheological elastic rubber sealing rubber cylinder is divided into three layers, namely a manganese-zinc permanent magnet, magnetorheological elastic rubber and oil-resistant rubber from inside to outside, wherein the manganese-zinc permanent magnet is adsorbed with the magnetorheological elastic rubber; setting a rubber cylinder outside the well and then putting the rubber cylinder into the well, anchoring the sleeve by the slips, and sealing the rubber cylinder and the sleeve under the action of axial compression and expansion of oil gas; when the rubber barrel and the oil pipe are unsealed and fished, a high-temperature heat conductor is put in, the magnetism of the manganese-zinc permanent magnet disappears, the magneto-rheological elastic rubber is changed into a rubber body which can be deformed from a solid, and the rubber barrel and the oil pipe can be unsealed and fished; the utility model has the advantages of simple structure, time and labor saving, high efficiency and good safety.

Description

Air faucet adjustable salvageable underground throttle based on magnetorheological elastic rubber

Technical Field

The utility model relates to a choke in pit, concretely relates to salvage choke in pit based on magneto rheological elastic rubber with adjustable air cock.

Background

The downhole choke is an important downhole tool for realizing throttling and pressure reduction, yield control, hydrate formation control and surface flow simplification in the production process of gas wells, particularly high-pressure gas wells. The clamping mechanism of the currently applied oil pipe slip type underground throttleer is composed of 3 slips which are same in tooth shape, material and processing technology, and the slips and the inner wall of an oil pipe generate acting force to achieve fixation by means of pressure difference. However, as the pipe diameter of a production pipe column of a gas well increases, the sealing area of the slip type underground throttleer increases, the pressure difference born by the slip type underground throttleer after the slip type underground throttleer is sealed also increases, and meanwhile, the throttleer is unlocked by the fact that the slips and a cone generate relative displacement through downward shock; however, as the setting force of the choke is increased, the deblocking force is also increased, and after the underground choke is in service for a long time, a sealing rubber cylinder of the choke is easy to creep and age under the action of high-temperature, high-pressure and fatigue alternating loads and is adhered to a shaft, so that the choke is difficult to salvage, and even underground accidents can occur. In addition, because the parameters of each well are different, the collection amount is unstable, and in the oil and gas exploitation process, underground crude oil and natural gas contain certain impurities, silt can generate impact wear on a conveying pipeline and equipment in a high-temperature and high-speed environment, and especially erosion on a throttle valve is generated.

The new intelligent material magnetorheological elastic rubber with controllable magnetic flow volume and elasticity is prepared through mixing micron level ferromagnetic grain into polymer and curing in magnetic field environment, so that the grain inside the matrix has chain or column structure. The elastic modulus of the material can change along with the intensity of the external magnetic field, so that the material is expected to be widely applied to the variable-stiffness device and the like. The magnetorheological elastomer has the high technical characteristics of controllability, reversibility, quick response and the like, and also has the unique advantages of good stability and the like. The magnetorheological elastomer is widely applied to vibration reduction and noise reduction of vehicles such as automobiles, trains, ships and the like.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide an air tap adjustable salvageable underground throttle based on magnetorheological elastic rubber, which can automatically adjust the size of the air tap of the throttle in time according to the operation condition, avoid unstable acquisition amount caused by underground environment change and meet the requirement of centralized conveying; meanwhile, the problem that the choke is difficult to salvage due to the fact that the rubber sleeve is in a bonding mode with the oil pipe under the effects of high temperature, high pressure and fatigue alternating load when the rubber sleeve is sealed with the oil pipe is solved, and the choke has the advantages of being simple in structure, time-saving, labor-saving, high in efficiency and good in safety.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an adjustable air tap type salvageable downhole choke based on magnetorheological elastic rubber comprises: the device comprises a throwing head 1, wherein one end of the throwing head 1 is provided with a positioning ring 2, the inner ring of the positioning ring 2 is detachably connected with one end of an oil pipe 3, the other end of the oil pipe 3 sequentially penetrates through a fishing neck 4, a slip 5, a conical seat 6 and a magnetorheological elastic rubber sealing rubber cylinder 7, and the extending end of the oil pipe is provided with an air tap 8; salvage neck 4 and awl seat 6 and can dismantle with 3 outer walls of oil pipe and be connected, magnetic current becomes elastic rubber packing element 7 and adsorbs fixedly with oil pipe 3, elastic rubber packing element 7 can dismantle with the sand control cover 12 axial and be connected, be provided with sand control pipe 11 in the sand control cover 12, air cock 8 connects on the air cock seat 9 that sets up in sand control pipe 11, the opening part of air cock 8 contacts and is in by compression state with the spring A10 one end that sets up in sand control pipe 11.

The magnetorheological elastic rubber sealing rubber cylinder 7 is divided into three layers, the inner layer of the magnetorheological elastic rubber sealing rubber cylinder 7 is a manganese-zinc permanent magnet 7-1, the magnetorheological elastic rubber 7-2 is arranged outside the manganese-zinc permanent magnet 7-1, the magnetorheological elastic rubber 7-2 is coated with oil-resistant rubber 7-3, and the manganese-zinc permanent magnet 7-1 and the magnetorheological elastic rubber 7-2 are adsorbed.

The air faucet 8 comprises a nozzle 8-1 arranged at the top of the air faucet 8, a small ball 8-2 is arranged below the nozzle 8-1 in the air faucet 8, the small ball 8-2 is fixed in the middle of the upper part of a support plate 8-3 through a support rod 8-5, the outer ring of the support plate 8-3 is connected with a spring B8-4, and the spring B8-4 is fixedly arranged in a spring groove formed in the middle upper part of the vertical inner wall of the air faucet 8.

The detachable connection is a threaded connection or a clamping connection.

And an elastic snap ring 14 is arranged outside the slip 5.

The diameter of the small ball 8-2 is larger than that of the nozzle 8-1.

The carrier plate 8-3 is in a wheel-shaped hollow structure.

The utility model discloses a set up magnetic current becomes elasticity rubber packing element 7, wherein magnetic current becomes elasticity rubber packing element 7 and divide into the three-layer, its inlayer is manganese zinc permanent magnet 7-1, manganese zinc permanent magnet 7-1 is provided with magnetic current elasticity rubber 7-2 outward, the outer cladding of magnetic current elasticity rubber 7-2 has resistant oil rubber 7-3, manganese zinc permanent magnet 7-1 adsorbs with magnetic current elasticity rubber 7-2 mutually, manganese zinc permanent magnet 7-1 can be stereotyped magnetic current becomes elasticity rubber packing element 7 outside the well, transfer target location in the well afterwards, slips 5 and sleeve pipe 13 preliminary anchoring, then lift the steel wire tool string, slips 5 and sleeve pipe 13 further anchor die; in addition, due to the acting force of axial compression and expansion of oil gas, the sealing between the magnetorheological elastic rubber sealing rubber cylinder 7 and the sleeve 13 is realized; when fishing, a high-temperature heat conductor is put in, the magnetism of the manganese-zinc permanent magnet 7-1 disappears, the magnetorheological elastic rubber 7-2 is changed from solid into a rubber body which can deform, and the unsealing and fishing of the rubber cylinder and the oil pipe are completed; the small ball 8-2 which can move up and down is arranged in the air nozzle 8 to control and adjust the flow of fluid flowing through the nozzle 8-1, when the flow of fluid at the well head is higher, the fluid impacts the small ball 8-2 and drives the loading pad 8-3 to move upwards, and at the moment, the small ball limits a part of fluid to pass through the air nozzle; when the flow rate of fluid at the well head is lower, the upward impact force of the fluid on the small ball 8-2 is not enough to counteract the gravity borne by the small ball 8-2, and at the moment, the ballast pad 8-3 and the spring B8-4 move downwards under the gravity of the small ball 8-2, so that the space of the nozzle 8-1 is released, and the fluid flows smoothly. The utility model solves the problem that the choke is difficult to salvage because the rubber cylinder is creep and aging under the action of high temperature, high pressure and fatigue alternating load when the rubber cylinder is sealed with the oil pipe in the prior art and is adhered with the oil pipe into a whole, and realizes the controllable deformation of the rubber cylinder and the smooth salvage of the choke on the premise of not influencing the sealing sleeve of the rubber cylinder; meanwhile, the automatic adjustment of the size of the nozzle meets the requirement of constant yield of the oil well. Has the advantages of simple structure, time and labor saving, high efficiency and good safety.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the magnetorheological elastic rubber packing rubber cylinder 7 of the present invention.

Fig. 3 is a schematic view of the setting state of the present invention.

Fig. 4 is a schematic structural diagram of the adjustable air faucet 8 of the present invention.

Fig. 5 is a top view of the carrier plate 8-3 of the present invention.

In the figure: 1. a delivery head; 2. a positioning ring; 3. an oil pipe; 4. fishing a neck; 5. slips; 6. a conical seat; 7. the magnetorheological elastic rubber sealing rubber cylinder; 7-1, manganese zinc permanent magnet; 7-2, magnetorheological rubber filling liquid; 7-3 parts of an oil-resistant rubber layer; 8. an air tap; 8-1, a nozzle; 8-2, small balls; 8-3, a carrier plate; 8-4, a spring B; 8-5, a support rod; 9. an air nozzle seat; 10. a spring A; 11. a sand control pipe; 12. a sand prevention cover; 13. a sleeve; 14. an elastic snap ring; 15. and (5) buckling.

Detailed Description

The following detailed description is made for the structural principle and the working principle of the present invention with reference to the accompanying drawings:

referring to fig. 1 and 2, the salvageable downhole choke with an adjustable air tap and based on magnetorheological elastic rubber comprises a throwing head 1, wherein one end of the throwing head 1 is provided with a positioning ring 2, the inner ring of the positioning ring 2 is detachably connected with one end of an oil pipe 3, the other end of the oil pipe 3 sequentially penetrates through a fishing neck 4, a slip 5, a conical seat 6 and a magnetorheological elastic rubber sealing rubber cylinder 7, and the extending end of the oil pipe is provided with an air tap 8; salvage neck 4 and awl seat 6 and can dismantle with 3 outer walls of oil pipe and be connected, magnetic current becomes elastic rubber packing element 7 and adsorbs fixedly with oil pipe 3, elastic rubber packing element 7 can dismantle with the sand control cover 12 axial and be connected, be provided with sand control pipe 11 in the sand control cover 12, air cock 8 connects on the air cock seat 9 that sets up in sand control pipe 11, the opening part of air cock 8 contacts and is in by compression state with the one end of the spring A10 that sets up in sand control pipe 11.

The magnetorheological elastic rubber sealing rubber cylinder 7 is divided into three layers.

The inner layer of the magnetorheological elastic rubber sealing rubber cylinder 7 is a manganese-zinc permanent magnet 7-1, magnetorheological elastic rubber 7-2 is arranged outside the manganese-zinc permanent magnet 7-1, oil-resistant rubber 7-3 is coated outside the magnetorheological elastic rubber 7-2, and the manganese-zinc permanent magnet 7-1 is adsorbed with the magnetorheological elastic rubber 7-2.

The detachable connection is a threaded connection or a clamping connection.

And an elastic snap ring 14 is arranged outside the slip 5.

The diameter of the small ball 8-2 is larger than that of the nozzle 8-1, so that the spring B8-4 or the supporting rod 8-5 is prevented from being broken, and the small ball is prevented from being separated from the nozzle 8-1.

The carrier plate 8-3 is a wheel-shaped hollow structure, so that fluid can smoothly pass through the carrier plate.

The utility model discloses a theory of operation does:

the utility model discloses an use and divide into to sit and seal and the deblocking:

firstly, setting: the steel wire tool is connected into a ring buckle 15 arranged on the throwing head 1, the utility model is put into a sleeve 13 until a positioning ring 2 is put into a position reserved in the sleeve 13 in advance, at the moment, the slips 5 are radially extended by the pursuit of the conical seat 6, the elastic snap ring 14 is separated from the slips 5, the slips 5 and the sleeve 13 are primarily anchored, then the steel wire tool string is lifted, the throwing head 1, the conical seat 6 and the magnetorheological elastic rubber sealing rubber cylinder 7 move upwards relative to the slips 5, and the slips 5 and the sleeve 13 are anchored; the magnetorheological elastic rubber sealing rubber cylinder 7 is divided into three layers, the inner layer is a manganese-zinc permanent magnet 7-1, the magnetorheological elastic rubber 7-2 is arranged outside the manganese-zinc permanent magnet 7-1, oil-resistant rubber 7-3 is coated outside the magnetorheological elastic rubber 7-2, the manganese-zinc permanent magnet 7-1 is adsorbed with the magnetorheological elastic rubber 7-2, and the magnetorheological elastic rubber sealing rubber cylinder 7 and the sleeve 13 are sealed and successfully set due to the acting force of axial compression and expansion of oil gas during oil extraction.

Secondly, deblocking: when the utility model discloses a pressure balance back to go into the position that magnetic current becomes elastic rubber sealing rubber tube 7 is sealed under the fishing tool that the steel wire polyphone has high temperature heat conductor, manganese zinc permanent magnet 7-1 disappears because of high temperature heating magnetism, and magnetic current becomes elastic rubber 7-2's modulus of elasticity and reduces, becomes the elastomer that can take place deformation by the solid that can not become, at this moment, lifts the steel wire instrument cluster, and slips 5 radially contracts under the effect of external force and contracts and the deblocking of sleeve pipe 13, continues to lift the steel wire instrument cluster, until will the utility model discloses the device provides the pit shaft.

The utility model also arranges a small ball 8-2 which can move up and down in the air nozzle 8 to control and adjust the flow of the fluid flowing through the nozzle 8-1, when the flow of the fluid at the well mouth is higher, the fluid impacts the small ball 8-2 and drives a bearing pad 8-3 connected with a spring B8-4 to move upwards, and at the moment, the small ball limits a part of the fluid to pass through the air nozzle; when the flow rate of fluid at the well head is lower, the upward impact force of the fluid on the small ball 8-2 is not enough to counteract the gravity borne by the small ball 8-2, and at the moment, the ballast pad 8-3 and the spring B8-4 move downwards under the gravity of the small ball 8-2, so that the space of the nozzle 8-1 is released, and the fluid flows smoothly. The automatic adjustment of the size of the nozzle meets the requirement of constant production of the oil well.

The above description of the embodiments is only intended to facilitate the understanding of the method of the present invention and its core idea; for the person skilled in the art, the details of the embodiments, applications and materials may vary widely according to the spirit of the embodiments of the present invention, and the content of the present description should not be construed as limiting the present invention.

Claims

1. A salvageable downhole choke with an adjustable gas nozzle based on magnetorheological elastic rubber, comprising a throwing head (1), characterized in that: one end of the throwing head (1) is provided with a positioning ring (2), so The inner ring of the positioning ring (2) is detachably connected to one end of the oil pipe (3), and the other end of the oil pipe (3) passes through the salvage neck (4), the slips (5), the cone seat (6) and the magnetic current in sequence. The elastic rubber sealant cylinder (7) is provided with a gas nozzle (8) at its protruding end, and the salvage neck (4) and the cone seat (6) are detachably connected to the outer wall of the oil pipe (3). The magnetorheological elastic rubber sealant cartridge (7) is adsorbed and fixed to the oil pipe (3), the magnetorheological elastic rubber sealant cartridge (7) is axially detachably connected to the sand-proof cover (12), and the sand-proof cover (12) ) is provided with a sand control pipe (11), the gas nozzle (8) is connected to the gas nozzle seat (9) provided in the sand control pipe (11), and the opening of the gas nozzle (8) is connected to the sand control pipe (11). One end of the spring A (10) set in ) is in contact and is in a compressed state.

2. A salvageable downhole choke with adjustable air nozzle based on magnetorheological elastic rubber according to claim 1, characterized in that: the magnetorheological elastic rubber sealant cylinder (7) is divided into three layers , its inner layer is a manganese-zinc permanent magnet (7-1), a magneto-hydroelastic rubber (7-2) is arranged outside the manganese-zinc permanent magnet (7-1), and the magneto-hydroelastic rubber (7-2) is covered with Oil-resistant rubber (7-3), manganese-zinc permanent magnet (7-1) and magneto-hydroelastic rubber (7-2) are adsorbed.

3. The salvageable downhole choke with adjustable gas nozzle based on magnetorheological elastic rubber according to claim 1, characterized in that: the gas nozzle (8) comprises a mouth (8) arranged on the top thereof -1), in the air nozzle (8), a small ball (8-2) is arranged below the mouth (8-1), and the small ball (8-2) is fixed on the The upper part of the carrier plate (8-3) is in the center, the outer ring of the carrier plate (8-3) is connected with the spring B (8-4), and the spring B (8-4) is fixedly installed in the middle of the vertical inner wall of the gas nozzle (8). in the spring groove set in the upper part.

4 . The salvageable downhole choke based on magnetorheological elastic rubber with an adjustable gas nozzle according to claim 1 , wherein the detachable connection is a threaded connection or a snap connection. 5 .

5 . The salvageable downhole choke based on magnetorheological elastic rubber with an adjustable air nozzle according to claim 1 , wherein an elastic snap ring ( 14 ) is provided outside the slips ( 5 ). 6 .

The salvageable downhole choke based on magnetorheological elastic rubber with adjustable gas nozzle according to claim 3, characterized in that: the diameter of the small ball (8-2) is larger than that of the mouth (8-2). 1) Diameter.

7 . The salvageable downhole choke based on magnetorheological elastic rubber with an adjustable air nozzle according to claim 3 , wherein the carrier plate ( 8 - 3 ) is a wheel-shaped hollow structure. 8 .