CN114427380A

CN114427380A - Underground fluid one-way conduction high-speed stop valve and method using same

Info

Publication number: CN114427380A
Application number: CN202011068839.0A
Authority: CN
Inventors: 钱钦; 王登庆; 李德忠; 韦敏; 刘艳霞; 任闽燕; 聂飞朋; 贺启强; 田俊
Original assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering Shengli Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering Shengli Co
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2022-05-03

Abstract

The invention discloses a downhole fluid one-way conduction high-speed stop valve which comprises a central tube and an outer tube, wherein an accommodating space is formed between the central tube and the outer tube, a multi-stage outer guide cylinder, a multi-stage inner guide cylinder, an outer guide cylinder and an inner guide cylinder are further arranged in the accommodating space, the upper end part of the outer tube is connected with the central tube in a positioning mode through an upper gland, the lower end part of the outer tube is connected with the central tube in a positioning mode through a lower gland, gaps are formed among the inner guide cylinder, the outer guide cylinder and the inner guide cylinder, and a continuous structure channel is formed in the accommodating space through the gaps. The invention controls the flow rate by utilizing the flow guiding and refluxing functions of the continuous structure channel, thereby ensuring the exploitation safety of the oil well. The invention also discloses a method for applying the underground fluid one-way conduction high-speed stop valve, and the fluid is injected into the stratum by using the method. The valve body of the device has no moving parts, high reliability and easy construction and installation.

Description

Underground fluid one-way conduction high-speed stop valve and method using same

Technical Field

The invention relates to the technical field of oil exploitation downhole tools, in particular to a downhole fluid one-way conduction high-speed stop valve and a method for using the same.

Background

At present, in a hydraulic control separate layer water injection and oil extraction process tubular column of an oil exploitation well, a one-way conduction valve used in the underground is usually in one-way conduction by virtue of a ball or a spring, and when the other direction is pressed, a channel of the one-way conduction valve can be blocked, so that the functions of anti-sand discharge and well control safety are realized, and the exploitation safety of an oil well is guaranteed.

In order to adapt to actual working conditions in the production process, fluid needs to be injected or extracted under the condition that the low-speed flow of fluid in an oil well is safely controlled, when the existing one-way conduction valve is used, when the fluid speed is increased to a designed critical value, the flow speed is not easy to control due to no corresponding flow speed control structure in the one-way valve, and at the moment, an oil layer is very easy to be damaged by impact due to overlarge fluid speed injected by a water injection well, or the oil layer is very easy to cause the abnormality such as well kick, blowout and the like due to the overlarge oil production due to the overlarge fluid speed injected by the water injection well.

The design of a downhole fluid one-way conduction high-speed stop valve with a flow rate control structure is a problem which needs to be solved urgently.

And (3) retrieval and comparison: keyword downhole fluid high-speed stop valve, oil exploitation stop valve.

Comparative document 1, publication (bulletin) No.: CN209638400U, publication (public notice) day: 2019-11-15 discloses a stop valve for oil exploitation, which comprises an outer shell, wherein a sleeve is fixedly installed on the outer surface of the middle of the upper end of the outer shell, a first disc is fixedly installed on the outer surface of the upper end of the sleeve, a second disc is fixedly installed on the outer surface of the upper end of the first disc, a threaded ring is fixedly installed on the outer surface of the middle of the upper end of the second disc, a corrugated pipe is fixedly installed on the outer surface of the upper end of the threaded ring, an interlayer and a valve block are arranged inside the outer shell, the valve block is located at the upper end of the interlayer, and a screw rod is fixedly installed on the outer surface of the middle of the upper end of the valve block. The utility model provides a stop valve for oil development, is equipped with bellows, rubber circle and bayonet socket through-hole, can also strengthen the leakproofness for the screw rod provides the protection, can also prevent each subassembly wearing and tearing, and valve block home range increases passes the bayonet socket through-hole, makes the stop valve lose the effect, brings better use prospect. The technical scheme, technical problems and technical effects of the disclosed technology are not relevant to the invention.

Reference 2, publication (bulletin) No.: CN202370476U, publication (public notice) day: 2012-08-08 discloses a stop valve which comprises a valve core, a valve body, a sealing element and an end cover. A valve core is arranged in the valve body, a sealing element is arranged on the valve core, and an end cover is arranged at one end of the valve body. The oil valve has the characteristics of preventing oil stealing and valve stealing events and environmental pollution events, reducing the operation cost of enterprises, adopting welding, screw threads and buckle connection, having simple structure, being firm and durable when adopting welding connection, being difficult to steal, being beneficial to management and the like, and being widely applied to oil production wellhead production trees. The technical scheme, technical problems and technical effects of the disclosed technology are not relevant to the invention.

Reference 3, publication (bulletin) No.: CN2145290Y, publication (public notice) day: 1993-11-03 relates to a stop valve used in industrial pipelines, in particular to a stop valve which is suitable for various oil, gas and water pipelines in the oil exploitation process. Mainly comprises a valve body, a gland, a bush, a plunger, a hand wheel and a valve rod. It is characterized in that the plunger is a hollow cylinder, a track is arranged on the outer circular surface and is in sliding fit with a groove in the valve body, the outer lower part of the plunger is provided with a taper of 45-60 degrees, and hard alloy is welded in a surfacing mode; the lower part of the plunger is provided with a seal; a valve rod gasket or a spring disc is arranged between the gland and the bush; a sealing culvert and a sealing gasket are arranged between the valve body and the plunger piston. The stop valve with simple structure has the advantages that the valve rod only rotates, the hydraulic self-balancing switch without up-down displacement is light and convenient, and the sealing performance is good. The technical scheme, technical problems and technical effects of the disclosed technology are not relevant to the invention.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a downhole fluid one-way conduction high-speed stop valve, which is characterized in that a continuous structural channel is designed between a central pipe and an outer pipe to form a valve body capable of enabling fluid to normally flow at low speed in one direction and be blocked at high speed and rapidly and continuously pass in the other direction. The valve body can effectively avoid sand production caused by scouring of the stratum by injected fluid, prevents the oil layer from being damaged by impact due to overlarge speed of the fluid injected by the water injection well, and ensures the exploitation safety of the oil well.

In order to solve the technical problems, the invention provides the following technical scheme:

a high-speed stop valve for one-way conduction of underground fluid comprises a central tube and an outer tube sleeved outside the central tube, wherein the central axes of the central tube and the outer tube are coincident, an accommodating space is formed between the central tube and the outer tube, a plurality of stages of outer guide cylinders are sequentially sleeved and embedded on the central tube from top to bottom in the accommodating space, the width of the outer guide cylinder on the single side of the radial section of the outer tube is smaller than the distance between the central tube and the outer tube, a plurality of stages of inner guide cylinders are sequentially sleeved and embedded on the position, which is close to the outer tube, of the accommodating space relative to the central tube from top to bottom, the width of the inner guide cylinder on the single side of the radial section of the outer tube is smaller than the distance between the central tube and the outer tube, an outer guide cylinder and an inner guide cylinder are further sleeved and embedded between the inner guide cylinder and the outer guide cylinder from top to bottom in the accommodating space, and the upper end part of the outer tube is positioned and connected through an upper gland, the lower end of the outer pipe is connected with the central pipe in a positioning mode through a lower pressing cover, the inner guide cylinder, the outer guide cylinder and the inner guide cylinder are all of annular structures with special shapes on the axial section of the outer pipe, spaced gaps are formed between the inner guide cylinder and the outer guide cylinder, between the outer guide cylinder and the outer guide cylinder, between the inner guide cylinder and between the outer guide cylinder and the inner guide cylinder, and a continuous structure channel is formed in the accommodating space through the spaced gaps.

The downhole fluid one-way conduction high-speed stop valve and the method for using the downhole fluid one-way conduction high-speed stop valve have at least the following advantages,

1. the invention designs a continuous structure channel formed by filling an inner guide cylinder, an outer guide cylinder, an inner guide cylinder and an outer guide cylinder in an outer pipe, and a valve body which can ensure that fluid can normally circulate at low speed in one direction and be blocked at high speed and can rapidly and continuously pass in the other direction is formed. Compared with the traditional one-way conduction valve without a flow rate control structure, when the flow rate of the injected water is too high, such as the fluid speed is increased to a designed critical value, backflow hydraulic force is easily formed due to the flow guiding and backflow effects of the continuous structure channel, the hydraulic force of the injected fluid is weakened, even the injected fluid is completely prevented from entering the stratum, sand production caused by scouring of the stratum by the injected fluid is effectively avoided, the flow rate is controlled, the phenomenon that the oil layer is easily damaged by impact due to the fact that the flow rate of the injected fluid of the injection well is too high, or abnormal conditions such as well kick, blowout and the like caused by the fact that the oil production is too high due to the fact that the flow rate of the injected fluid of the injection well is too high is avoided, and the safety of the oil exploitation well is guaranteed.

2. Compared with the condition that the one-way conduction valve used in the traditional underground is usually in one-way conduction by means of a ball or a spring, the valve body of the device has no moving part, and is high in reliability and easy to construct and install;

3. when the invention is used, the flow rate of the fluid in any layer can be limited at constant pressure according to the actual working condition. When the device is used in an oil well, the production speed can be controlled, and the well can be quickly pressed when abnormal conditions occur; when the device is used in a water well, the injection speed can be controlled, and the sand production of an oil deposit is prevented from being impacted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and are not intended to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of a downhole fluid one-way connection high-speed stop valve according to an embodiment of the invention;

fig. 2 is a structural schematic diagram of a first-stage outer guide shell of the embodiment of the invention on the right single side of the axial section of the outer pipe;

fig. 3 is a schematic structural view of the second-stage outer guide shell of the embodiment of the invention on the right single side of the axial section of the outer pipe;

fig. 4 is a schematic structural view of a three-stage outer guide shell of the embodiment of the invention on the right single side of the axial section of the outer pipe;

FIG. 5 is a schematic structural view of a first-stage inner guide shell of the embodiment of the invention on the right single side of the axial section of the outer pipe;

fig. 6 is a structural schematic diagram of the second-stage inner guide shell of the embodiment of the invention on the right single side of the axial section of the outer pipe;

fig. 7 is a structural schematic diagram of a three-stage inner guide shell of the embodiment of the invention on the right single side of the axial section of the outer pipe;

FIG. 8 is a schematic top view of the relative positions of the first positioning claw and the second positioning claw of the outer cylindrical guide shell on the radial section of the outer tube according to the embodiment of the present invention;

FIG. 9 is a schematic perspective view of an outer cylindrical draft tube according to an embodiment of the present invention;

FIG. 10 is a schematic top view of the relative positions of a first positioning claw of an inner guide cylinder and a second positioning claw of the inner guide cylinder on a radial section of an outer tube according to an embodiment of the present invention;

FIG. 11 is a schematic perspective view of an inner circular guide cylinder according to an embodiment of the present invention;

FIG. 12 is a schematic view of the overall structure of a downhole fluid one-way communication high-speed stop valve according to embodiment 2 of the invention;

wherein, 1-a central tube, 101-a sealing step, 102-a first liquid outlet hole, 103-an inner guide cylinder limiting step, 2-an upper gland, 3-a first-stage outer guide cylinder, 301-a first special-shaped sealing step, 302-a first special-shaped straight line second side, 303-a first special-shaped straight line first side, 304-a first special-shaped straight line third side, 305-a first special-shaped straight line fourth side, 4-an outer guide cylinder, 401-an outer guide cylinder first positioning claw, 402-a seventh special-shaped straight line first side, 403-a seventh special-shaped arc line second side, 404-an outer guide cylinder second positioning claw, 405-a seventh special-shaped straight line third side, 5-a first-stage inner guide cylinder, 501-a fourth special-shaped straight line fifth side, 502-a fourth special-shaped straight line fourth side, 503-a fourth special-shaped straight line first side, 504-a fourth shaped straight line second side, 505-a fourth shaped straight line third side, 6-a second stage outer draft tube, 601-a second shaped sealing step, 602-a second shaped arc second side, 603-a second shaped straight line third side, 604-a second shaped straight line fourth side, 605-a second shaped straight line first side, 606-a second shaped straight line fifth side, 607-a second shaped straight line sixth side, 7-an inner draft tube, 701-an inner draft tube first positioning claw, 702-an eighth shaped straight line first side, 703-an eighth shaped straight line third side, 704-an eighth shaped arc second side, 705-an inner draft tube second positioning claw, 8-a second stage inner draft tube, 801-a fifth shaped sealing step, 802-a fifth shaped arc sixth side, 803-a fifth shaped straight line fifth side, 804-a fourth side of a fifth special-shaped straight line, 805-a first side of a fourth special-shaped straight line, 806-a second side of the fifth special-shaped straight line, 807-a third side of the fifth special-shaped straight line, 9-a third-stage outer draft tube, 901-a third special-shaped sealing step, 902-a second side of a third special-shaped arc line, 903-a third special-shaped straight line, 904-a fourth side of the third special-shaped straight line, 905-a first side of the third special-shaped straight line, 906-a fifth side of the third special-shaped straight line, 907-a sixth side of the third special-shaped straight line, 10-a third-stage inner draft tube, 1001-a sixth special-shaped sealing step, 1002-a fifth side of the sixth special-shaped arc line, 1003-a fourth side of the sixth special-shaped straight line, 1004-a first side of the sixth special-shaped straight line, 1005-a second side of the sixth special-shaped straight line, 1006-a third side of the sixth special-shaped straight line, 11-flywheel type stop ring, 1101-pin, 1102-second liquid outlet hole, 12-outer tube, 1201-third liquid outlet hole and 13-lower gland.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Example 1:

referring to fig. 1-11, a downhole fluid one-way conduction high-speed stop valve comprises a central tube 1, an outer tube 12 sleeved outside the central tube, the central axes of the central tube 1 and the outer tube 12 are coincident, an accommodating space is formed between the central tube 1 and the outer tube 12, a plurality of stages of outer guide cylinders are sequentially sleeved and embedded on the central tube 1 from top to bottom in the accommodating space, the width of each outer guide cylinder on one side of the radial section of the outer tube is smaller than the distance between the central tube 1 and the outer tube 12, a plurality of stages of inner guide cylinders are sequentially sleeved and embedded on the outer tube from top to bottom in the accommodating space relative to the central tube, the width of each inner guide cylinder on one side of the radial section of the outer tube is smaller than the distance between the central tube 1 and the outer tube 12, an outer guide cylinder 4 and an outer guide cylinder 7 are further sleeved and embedded between the inner guide cylinder and the outer guide cylinder from top to bottom in the accommodating space, the upper end of the outer tube 12 is positioned and connected with the central tube 1 through an upper gland 2, the lower end of the outer pipe 12 is connected with the central pipe 1 in a positioning mode through a lower pressing cover 13, wherein the inner guide cylinder, the outer guide cylinder 4 and the inner guide cylinder 7 are all of annular structures with special shapes on the axial section of the outer pipe, gaps are formed between the inner guide cylinder and the outer guide cylinder, between the inner guide cylinder and the outer guide cylinder 4, between the outer guide cylinder and the outer guide cylinder 4, between the inner guide cylinder and the inner guide cylinder 7 and between the outer guide cylinder and the inner guide cylinder 7, and continuous structural channels are formed in the containing space by the gaps.

In the working state, the ground injected water can be injected into the stratum along a continuous structure formed by filling the inner guide cylinder, the outer guide cylinder, the inner guide cylinder and the outer guide cylinder in the outer pipe.

The side of the upper part of the central tube 1 is provided with a sealing step 101, the side of the upper part of the central tube 1 is also provided with a first liquid outlet hole 102, the first liquid outlet hole 102 is positioned below the sealing step 101, the sealing step 101 is positioned below the upper end part of the outer tube 12, the side of the upper part of the central tube 12 is also provided with an inner guide cylinder limiting step 103, and the inner guide cylinder limiting step 103 is positioned below the first liquid outlet hole 102. The inner guide cylinder limiting step 103 plays a role in assisting in fixing the inner guide cylinder.

The lower portion of the central tube 1 is further provided with a flywheel type stop ring 11, the flywheel type stop ring 11 is fixed on the outer tube 12 through a pin 1101, the flywheel type stop ring 11 is located on the upper portion of the lower pressing cover 13, and second liquid outlet holes 1102 are evenly distributed in the flywheel type stop ring 11.

The bottom of the outer tube 12 is further provided with a third liquid outlet hole 1201, and the third liquid outlet hole 1201 is located between the flywheel type stop ring 11 and the lower pressing cover 13.

The outer draft tube has three levels, including the outer draft tube 3 of one-level, outer draft tube 6 of second grade and tertiary outer draft tube 9, the outer draft tube 3 of one-level, outer draft tube 6 of second grade and tertiary outer draft tube 9 paste outer tube 12 department top-down and set up in order in the accommodation space, and interior draft tube has three levels, including draft tube 5 in the one-level, draft tube 8 in the second grade and draft tube 10 in the tertiary, draft tube 5 in the one-level, draft tube 8 in the second grade and draft tube 10 paste outer tube 12 department top-down and set up in order in the accommodation space.

The shape of one-level outer draft tube 3 on the right single side of the axial section of the outer tube 12 is a first special-shaped structure, and the first special-shaped structure comprises:

a first shaped straight first edge 303;

a first special-shaped straight line second edge 302, wherein one end of the first special-shaped straight line second edge 302 is connected with one end of the first special-shaped straight line first edge 303, an angle alpha 1 is formed between the two straight lines, and the angle alpha 1 is 60-75 degrees;

a first special-shaped straight line third side 304 arranged in parallel with the first special-shaped straight line first side 303, wherein one end of the first special-shaped straight line third side 304 is connected with the other end of the first special-shaped straight line second side 302;

a first modified straight line fourth side 305 perpendicular to the first modified straight line third side 304 and on the same side of the first modified straight line third side 304 as the first modified straight line second side 302, one end of the first modified straight line fourth side 305 being connected to the other end of the first modified straight line third side 304, the other end of the first modified straight line fourth side 305 being connected to the other end of the first modified straight line first side 303,

a gap first special-shaped sealing step 301 is formed between the first special-shaped straight line first edge 303 and the first special-shaped straight line fourth edge 305;

the shape of the second-stage outer draft tube 6 on the right single side surface of the axial section of the outer tube 12 is a second special-shaped structure, and the second special-shaped structure comprises:

a second shaped straight first edge 605;

a second side 602 of the second shaped arc, one end of the second side 602 of the second shaped arc is connected with one end of the first side 605 of the second shaped straight line;

a second special-shaped straight line third edge 603, which forms an angle alpha 2 with the second special-shaped straight line first edge 605, wherein the angle alpha 2 is 60-75 degrees, and one end of the second special-shaped straight line third edge 603 is connected with the other end of the second special-shaped arc line second edge 602;

a second special-shaped straight fourth edge 604 forming an angle α 3 with the second special-shaped straight third edge 603, the angle α 3 being the sum of the angle α 1 and the angle α 2, one end of the second special-shaped straight fourth edge 604 being connected to the other end of the second special-shaped straight third edge 603;

a second special-shaped straight line fifth side 606 parallel to the second special-shaped straight line first side 605, wherein one end of the second special-shaped straight line fifth side 606 is connected with the other end of the second special-shaped straight line fourth side 604;

a second special-shaped straight line sixth edge 607 which is perpendicular to the second special-shaped straight line fifth edge 606, one end of the second special-shaped straight line sixth edge 607 is connected with the other end of the second special-shaped straight line fifth edge 606, the other end of the second special-shaped straight line sixth edge 607 is connected with the other end of the second special-shaped straight line first edge 605, wherein the arc-shaped bulge of the second special-shaped arc line second edge 602 faces the direction of the second special-shaped straight line sixth edge 607, and a second special-shaped sealing step 601 which is interrupted is formed between the second special-shaped straight line first edge 605 and the second special-shaped straight line sixth edge 607;

the shape of the three-level outer guide cylinder 9 on the right single side surface of the axial section of the outer pipe 12 is a third differential structure, and the third differential structure comprises:

a third differential straight first side 905;

a third differential arc line second edge 902, wherein one end of the third differential arc line second edge 902 is connected with one end of a third differential straight line first edge 905;

a third different straight line third side 903 forming an angle α 4 with the third different straight line first side 905, the angle α 4 being the same as the angle α 2, one end of the third different straight line third side 903 being connected to the other end of the third different arc line second side 902;

a third differential straight-line fourth edge 904 having an angle α 5 with the third differential straight-line third edge 903, the angle α 5 being the same as the angle α 3, one end of the third differential straight-line fourth edge 904 being connected to the other end of the third differential straight-line third edge 903;

a third differential straight line fifth side 906 parallel to the third differential straight line first side 905, one end of the third differential straight line fifth side 906 being connected to the other end of the third differential straight line fourth side 904;

a sixth edge 907 of the third differential straight line, which is perpendicular to the fifth edge 906 of the third differential straight line, one end of the sixth edge 907 of the third differential straight line is connected with the other end of the fifth edge 906 of the third differential straight line, and the other end of the sixth edge 907 of the third differential straight line is connected with the other end of the first edge 905 of the third differential straight line; the arc-shaped bulge of the third differential arc second edge 902 faces the direction of the third differential straight line sixth edge 907, and a third differential sealing step 901 which is absent is formed between the third differential straight line first edge 905 and the third differential straight line sixth edge 907;

the shape of the right single-sided surface of the axial section of the outer pipe 12 of the first-level inner guide cylinder 5 is a fourth special-shaped structure, and the fourth special-shaped structure comprises:

a fourth shaped straight first edge 503;

a fourth special-shaped straight line second side 504 perpendicular to the fourth special-shaped straight line first side 503, one end of the fourth special-shaped straight line second side 504 being connected to one end of the fourth special-shaped straight line first side 503;

a fourth special-shaped straight line third side 505 which is parallel to the fourth special-shaped straight line first side 503, wherein one end of the fourth special-shaped straight line third side 505 is connected with the other end of the fourth special-shaped straight line second side 504, and the fourth special-shaped straight line third side 505 and the fourth special-shaped straight line first side 503 are on the same side surface of the fourth special-shaped straight line second side 504;

a fourth special-shaped straight line fourth edge 502, wherein one end of the fourth special-shaped straight line fourth edge 502 is connected with one end of a fourth special-shaped straight line third edge 505, the fourth special-shaped straight line fourth edge 502 and the fourth special-shaped straight line third edge 505 form an angle alpha 6, and the angle alpha 6 is an angle alpha 2 complement angle.

A fifth side 501 of the fourth special-shaped straight line, one end of the fifth side 501 of the fourth special-shaped straight line is connected with the other end of the fourth special-shaped straight line 502, the other end of the fifth side 501 of the fourth special-shaped straight line is connected with the other end of the first side 503 of the fourth special-shaped straight line, the fifth side 501 of the fourth special-shaped straight line and the fourth special-shaped straight line 502 form an angle of α 7, and the angle of α 7 is the same as the angle of α 3.

The shape of the second-level inner guide cylinder 8 on the right single side surface of the axial section of the outer pipe is a fifth special-shaped structure, and the fifth special-shaped structure comprises:

a fifth shaped straight first side 805;

a fifth modified straight line second side 806 perpendicular to the fourth modified straight line first side 805, one end of the fifth modified straight line second side 806 being connected to one end of the fourth modified straight line first side 805;

a fifth special-shaped straight line third side 807 which is parallel to the fifth special-shaped straight line first side 805, wherein one end of the fifth special-shaped straight line third side 807 is connected with the other end of the fifth special-shaped straight line second side 806, and the fifth special-shaped straight line third side 807 and the fifth special-shaped straight line first side 805 are on the same side of the fifth special-shaped straight line second side 806;

a fifth special-shaped straight-line fourth side 804 forming an angle α 8 with the fifth special-shaped straight-line third side 807, the angle α 8 being the same as the angle α 6, one end of the fifth special-shaped straight-line fourth side 804 being connected to the other end of the fifth special-shaped straight-line third side 807;

a fifth special-shaped straight line fifth edge 803, one end of the fifth special-shaped straight line fifth edge 803 is connected with the other end of the fifth special-shaped straight line fourth edge 804, the fifth special-shaped straight line fifth edge 803 and the fifth special-shaped straight line fourth edge 804 form an angle alpha 9, and the angle alpha 9 is the same as the angle alpha 3.

A fifth special-shaped arc line sixth edge 802, one end of the fifth special-shaped arc line sixth edge 802 is connected with the other end of the fifth special-shaped straight line fifth edge 803, an arc-shaped bulge of the fifth special-shaped arc line sixth edge 802 faces the direction of the fifth special-shaped straight line second edge 806, and a fifth special-shaped sealing step 801 is formed between the fifth special-shaped straight line first edge 805 and the fifth special-shaped straight line second edge 806;

the shape of tertiary inner draft tube 10 at outer tube 12 axial section right single flank is sixth dysmorphism structure, and sixth dysmorphism structure includes:

a sixth shaped straight first side 1004;

a sixth modified straight line second side 1005 connected to one end of the sixth modified straight line first side 1004, the sixth modified straight line second side 1005 being perpendicular to the sixth modified straight line first side 1004;

a sixth special-shaped straight line third side 1006 which is parallel to the sixth special-shaped straight line first side 1004, wherein one end of the sixth special-shaped straight line third side 1006 is connected with the other end of the sixth special-shaped straight line second side 1005, and the sixth special-shaped straight line third side 1006 and the sixth special-shaped straight line first side 1004 are on the same side of the sixth special-shaped straight line second side 1005;

a sixth special-shaped straight fourth side 1003 forming an angle α 10 with the sixth special-shaped straight third side 1006, the angle α 10 being the same as the angle α 1, one end of the sixth special-shaped straight fourth side 1003 being connected with the other end of the sixth special-shaped straight third side 1006;

a sixth special-shaped arc line fifth side 1002, one end of the sixth special-shaped arc line fifth side 1002 is connected with the other end of the sixth special-shaped straight line fourth side 1003, the other end of the sixth special-shaped arc line fifth side 1002 is connected with the other end of the sixth special-shaped straight line first side 1004, an arc-shaped bulge of the sixth special-shaped arc line fifth side 1002 faces the direction of the sixth special-shaped straight line second side 1005, and a sixth special-shaped sealing step 1001 which is arranged in a gap is formed between the sixth special-shaped straight line first side 1004 and the sixth special-shaped straight line second side 1005;

the shape of excircle draft tube at outer tube axial section right single side is seventh dysmorphism structure, and seventh dysmorphism structure includes:

the seventh shaped straight first side 402,

a second side 403 of the seventh shaped arc, wherein one end of the second side 403 of the seventh shaped arc is connected with one end of the first side 402 of the seventh shaped straight line;

a third side 405 of the seventh special-shaped straight line, one end 405 of the third side of the seventh special-shaped straight line is connected with one end of the second side 403 of the seventh special-shaped arc line, and the other end 405 of the third side of the seventh special-shaped straight line is connected with the other end of the first side 402 of the seventh special-shaped straight line, wherein the arc-shaped protrusion of the second side 403 of the seventh special-shaped arc line faces away from the included angle formed by the third side 405 of the seventh special-shaped straight line and the first side 402 of the seventh special-shaped straight line;

the shape of the right single side surface of the axial section of the outer pipe of the inner circular guide cylinder is an eighth special-shaped structure, and the eighth special-shaped structure comprises:

an eighth shaped linear first side 702;

a second side 704 of the eighth shaped arc, one end of the second side 704 of the eighth shaped arc being connected to one end of the first side 702 of the eighth shaped straight line;

an eighth special-shaped straight third side 703;

one end of a third edge 703 of the eighth special-shaped straight line is connected with one end of a second edge 704 of the eighth special-shaped arc line, and the other end of the third edge 703 of the eighth special-shaped straight line is connected with the other end of the first edge 702 of the eighth special-shaped straight line, wherein an arc-shaped bulge of the second edge 704 of the eighth special-shaped arc line faces away from an included angle formed by the third edge 703 of the eighth special-shaped straight line and the first edge 702 of the eighth special-shaped straight line;

wherein, the included angle between the seventh special-shaped straight line first side 402 and the central axis of the outer tube, the included angle between the eighth special-shaped straight line first side 702 and the central axis of the outer tube, and the included angle between the first special-shaped straight line second side 302 and the central axis of the outer tube are all the same; the included angle between the third side 405 of the seventh special-shaped straight line and the central axis of the outer tube, the included angle between the third side 703 of the eighth special-shaped straight line and the central axis of the outer tube, and the included angle between the fourth side of the fourth special-shaped straight line and the central axis of the outer tube are all the same.

The first special-shaped straight line first edge 303 is connected with the upper gland 2 in a sealing way through a first special-shaped sealing step 301, and a sealing material such as a sealing strip is filled in a gap between the first special-shaped sealing step and the upper gland; the first special-shaped straight line third side 304 is connected with the second special-shaped straight line first side 605 in a sealing mode through a second special-shaped sealing step 601, a sealing material such as a sealing strip is filled in a gap between the second special-shaped sealing step and the first special-shaped straight line third side 304, the second special-shaped straight line fifth side 606 is connected with the third special-shaped straight line first side 905 in a sealing mode through a third special-shaped sealing step 901, a sealing material such as a sealing strip is filled in a gap between the third special-shaped sealing step and the second special-shaped straight line fifth side 606, one end of the fourth special-shaped straight line first side 503 is in contact with the inner guide cylinder limiting step 101, the fourth special-shaped straight line third side 505 is connected with the fifth special-shaped straight line first side 805 through a fifth special-shaped sealing step 801, a sealing material such as a sealing strip is filled in a gap between the fifth special-shaped sealing step and the fourth special-shaped straight line third side 505, and the fifth special-shaped straight line third side 807 and the sixth straight line first side 1004 are connected in a sealing step 1001 in a sealing mode A gap between the sixth special-shaped sealing step and the fifth special-shaped straight line third side 807 is filled with a sealing material such as a sealing strip, the first special-shaped straight line second side 302, the second special-shaped straight line fourth side 604, the third special-shaped straight line fourth side 904, the fourth special-shaped straight line fifth side 501, the fifth special-shaped straight line fifth side 803 and the sixth special-shaped straight line fourth side 1003 are all parallel to each other, the second special-shaped straight line third side 603, the third special-shaped straight line third side 903, the fourth special-shaped straight line fourth side 502 and the fifth special-shaped straight line fourth side 804 are all parallel to each other, the radians of the second special-shaped arc line second side 602, the third special-shaped arc line second side 902, the fifth special-shaped arc line sixth side 802, the sixth special-shaped arc line fifth side 1002, the seventh special-shaped arc line second side 403 and the eighth special-shaped arc line second side 704 are all the same,

an outer circle guide cylinder first positioning claw 401 is arranged at the intersection of a seventh special-shaped straight line first edge 402 and a seventh special-shaped straight line second edge 405 of the outer circle guide cylinder with the annular structure, the outer circle guide cylinder first positioning claws 401 are distributed in an annular array relative to the center of the outer circle guide cylinder on the outer diameter radial section, an outer circle guide cylinder second positioning claw 404 is arranged at the intersection of a seventh special-shaped straight line third edge 405 and a seventh special-shaped arc line second edge 403 of the outer circle guide cylinder with the annular structure, the outer circle guide cylinder second positioning claw 404 is distributed in an annular array relative to the center of the outer circle guide cylinder on the outer diameter radial section, an inner circle guide cylinder first positioning claw 701 is arranged at the intersection of an eighth special-shaped straight line first edge 702 and an eighth special-shaped straight line second edge 703 of the inner circle guide cylinder with the annular structure, and the inner circle guide cylinder first positioning claws 701 are distributed in an annular array relative to the center of the inner circle guide cylinder on the outer diameter radial section, an inner circular guide cylinder second positioning claw 705 is arranged at the intersection of an eighth special-shaped straight line third edge 703 and an eighth special-shaped arc line second edge 704 of the inner circular guide cylinder in the annular structure, the inner circular guide cylinder second positioning claw 705 is distributed on the radial section of the outer pipe in an annular array relative to the center of the inner circular guide cylinder, and the lengths of the outer circular guide cylinder first positioning claw 401, the outer circular guide cylinder second positioning claw 404, the inner circular guide cylinder first positioning claw 701 and the inner circular guide cylinder second positioning claw 705 are the same as the width of a gap between the inner guide cylinder and the outer guide cylinder. The outer guide cylinder is supported and arranged between the inner guide cylinder and the outer guide cylinder through a first positioning claw 401 of the outer guide cylinder and a second positioning claw 404 of the outer guide cylinder, the inner guide cylinder is supported and arranged between the inner guide cylinder and the outer guide cylinder through a first positioning claw 701 of the inner guide cylinder and a second positioning claw 705 of the inner guide cylinder, and the arrangement of each positioning claw plays a role in supporting the arrangement position of the outer guide cylinder and the inner guide cylinder in the accommodating space.

Compared with the condition that the one-way conduction valve used in the traditional underground is usually in one-way conduction by means of a ball or a spring, the valve body of the device has no moving part, and is high in reliability and easy to construct and install. In the invention, gaps are arranged between the inner guide cylinder and the outer guide cylinder, between the inner guide cylinder and the outer guide cylinder 4, between the outer guide cylinder and the outer guide cylinder 4, between the inner guide cylinder and the inner guide cylinder 7 and between the outer guide cylinder and the inner guide cylinder 7, and the gaps form a continuous structure channel in the accommodating space. The structure channel enables the fluid to be blocked at a high speed in a low-speed normal circulation mode in one direction and to pass through the valve body in a rapid and continuous mode in the other direction, so that the flow speed is conveniently controlled, and the oil well exploitation safety is guaranteed.

A method for applying a downhole fluid one-way conduction high-speed stop valve is characterized in that the method is applied to the downhole fluid one-way conduction high-speed stop valve, and the method comprises the following steps:

s1, connecting the central tube 1 to a water injection well process tubular column, and lowering the central tube into a water injection layer, wherein ground injection water enters the first liquid outlet hole 102 of the central tube 1 through the process tubular column;

s2, the injected fluid flows through a continuous structure channel formed by the inner guide cylinder, the outer guide cylinder, the inner guide cylinder 7 and the outer guide cylinder 4 filled in the outer pipe 12, enters the second liquid outlet hole of the flywheel type stop ring 11 and the third liquid outlet hole of the outer pipe 12, and is injected into the stratum.

When the invention is used, when the flow velocity of the injected water is too large, such as the fluid velocity is increased to a designed critical value, due to the diversion and backflow effects of the continuous structure channel, backflow hydraulic force is easily formed, the hydraulic force of the injected fluid is weakened, even the injected fluid is completely prevented from entering the stratum, and sand production caused by scouring of the stratum by the injected fluid is effectively avoided. When the invention is used, the flow rate of the fluid in any layer can be limited at constant pressure according to the actual working condition. When the device is used in an oil well, the production speed can be controlled, and the well can be quickly pressed when abnormal conditions occur; when the device is used in a water well, the injection speed can be controlled, and the sand production of an oil deposit is prevented from being impacted.

Example 2:

referring to fig. 12, unlike embodiment 1, in this embodiment, the first-stage outer draft tube 3, the second-stage outer draft tube 6 and the third-stage outer draft tube 9 are sequentially inserted into the central tube from bottom to top at the position where they are attached to the outer tube 12 in the accommodating space, and the first-stage inner draft tube 5, the second-stage inner draft tube 8 and the third-stage inner draft tube 10 are sequentially inserted into the central tube in the accommodating space from bottom to top. The outer circle guide cylinder 4 and the inner circle guide cylinder 7 are also reversely arranged in the outer tube 12. The scheme can be used in an oil or gas well for controlling the production rate of an oil and gas layer. When output speed surpassed the critical value, the output value reduced, and the well head measurement descends, and the accessible is injected into the kill fluid and is got into the oil gas reservoir fast and deal with, reduces oil gas reservoir output speed, prevents the kick blowout, effectively protects the pit shaft and what cycle of extension oil well, improves the oil gas and deposits the output rate.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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.

Claims

1. A high-speed stop valve for one-way conduction of underground fluid is characterized by comprising a central tube and an outer tube sleeved outside the central tube, wherein the central axes of the central tube and the outer tube are coincident, an accommodating space is formed between the central tube and the outer tube, a plurality of stages of outer guide cylinders are sequentially sleeved and embedded on the central tube from top to bottom in the accommodating space, the width of the outer guide cylinder on the single side surface of the radial section of the outer tube is smaller than the distance between the central tube and the outer tube, a plurality of stages of inner guide cylinders are sequentially sleeved and embedded on the central tube from top to bottom at the position of the accommodating space, which is close to the outer tube, relative to the central tube, the width of the inner guide cylinders on the single side surface of the radial section of the outer tube is smaller than the distance between the central tube and the outer tube, an outer guide cylinder and an inner guide cylinder are further sleeved and embedded between the inner guide cylinders and the outer guide cylinders from top to bottom in the accommodating space, and the upper end part of the outer tube is positioned and connected with the central tube through an upper gland, the lower end of the outer pipe is connected with the central pipe in a positioning mode through a lower pressing cover, the inner guide cylinder, the outer guide cylinder and the inner guide cylinder are all of annular structures with special shapes on the axial section of the outer pipe, spaced gaps are formed between the inner guide cylinder and the outer guide cylinder, between the outer guide cylinder and the outer guide cylinder, between the inner guide cylinder and between the outer guide cylinder and the inner guide cylinder, and a continuous structure channel is formed in the accommodating space through the spaced gaps.

2. The downhole fluid one-way conduction high-speed stop valve according to claim 1, wherein a sealing step is arranged on the side surface of the upper portion of the central tube, a first liquid outlet hole is further arranged on the side surface of the upper portion of the central tube, the first liquid outlet hole is located below the sealing step, the sealing step is located below the upper end portion of the outer tube, an inner guide cylinder limiting step is further arranged on the side surface of the upper portion of the central tube, and the inner guide cylinder limiting step is located below the first liquid outlet hole.

3. The downhole fluid one-way conduction high-speed stop valve according to claim 2, wherein a flywheel type stop ring is further arranged on the lower portion of the central tube, the flywheel type stop ring is fixed on the outer tube through a pin, the flywheel type stop ring is located on the upper portion of the lower gland, and second liquid outlet holes are further uniformly distributed in the flywheel type stop ring.

4. The downhole fluid one-way conduction high-speed stop valve as claimed in claim 3, wherein the bottom of the outer tube is further provided with a third liquid outlet hole, and the third liquid outlet hole is positioned between the flywheel type stop ring and the lower pressing cover.

5. The downhole fluid one-way conduction high-speed stop valve according to claim 1, wherein the outer guide cylinder has three stages, including a first-stage outer guide cylinder, a second-stage outer guide cylinder and a third-stage outer guide cylinder, the first-stage outer guide cylinder, the second-stage outer guide cylinder and the third-stage outer guide cylinder are sequentially arranged from top to bottom at the position where the first-stage outer guide cylinder, the second-stage outer guide cylinder and the third-stage outer guide cylinder are attached to the outer pipe in the accommodating space, the inner guide cylinder has three stages, including a first-stage inner guide cylinder, a second-stage inner guide cylinder and a third-stage inner guide cylinder, and the first-stage inner guide cylinder, the second-stage inner guide cylinder and the third-stage inner guide cylinder are sequentially arranged from top to bottom at the position where the first-stage inner guide cylinder, the second-stage inner guide cylinder and the third-stage inner guide cylinder are attached to the outer pipe in the accommodating space.

6. The downhole fluid one-way conduction high-speed stop valve as claimed in claim 2, wherein the shape of the right single side surface of the axial section of the outer pipe of the primary outer guide cylinder is a first profile structure, and the first profile structure comprises:

a first shaped straight first edge;

one end of the first special-shaped straight line second edge is connected with one end of the first special-shaped straight line first edge, an angle alpha 1 is formed between the two straight lines, and the angle alpha 1 is 60-75 degrees;

the first special-shaped straight line third edge is arranged in parallel with the first special-shaped straight line first edge, and one end of the first special-shaped straight line third edge is connected with the other end of the first special-shaped straight line second edge;

a first special-shaped straight line fourth edge which is perpendicular to the first special-shaped straight line third edge and is positioned at the same side of the first special-shaped straight line third edge with the first special-shaped straight line second edge, one end of the first special-shaped straight line fourth edge is connected with the other end of the first special-shaped straight line third edge, the other end of the first special-shaped straight line fourth edge is connected with the other end of the first special-shaped straight line first edge,

a gap first special-shaped sealing step is formed between the first special-shaped straight line first edge and the first special-shaped straight line fourth edge;

the shape of the right single-sided surface of the axial section of the outer pipe of the second-stage outer guide cylinder is a second special-shaped structure, and the second special-shaped structure comprises:

a second shaped straight first edge;

one end of the second edge of the second special-shaped arc line is connected with one end of the first edge of the second special-shaped straight line;

a third edge of the second special-shaped straight line and the first edge of the second special-shaped straight line form an angle alpha 2, and the angle alpha 2 is 60-75 degrees;

one end of a third edge of the second special-shaped straight line is connected with the other end of a second edge of the second special-shaped arc line;

a fourth edge of the second special-shaped straight line and a third edge of the second special-shaped straight line form an angle alpha 3, and the angle alpha 3 is the sum of the angle alpha 1 and the angle alpha 2;

one end of the fourth edge of the second special-shaped straight line is connected with the other end of the third edge of the second special-shaped straight line;

a fifth edge of the second special-shaped straight line, which is parallel to the first edge of the second special-shaped straight line, wherein one end of the fifth edge of the second special-shaped straight line is connected with the other end of the fourth edge of the second special-shaped straight line;

a second special-shaped straight line sixth edge which is perpendicular to the second special-shaped straight line fifth edge, one end of the second special-shaped straight line sixth edge is connected with the other end of the second special-shaped straight line fifth edge, the other end of the second special-shaped straight line sixth edge is connected with the other end of the second special-shaped straight line first edge, an arc-shaped bulge of the second special-shaped arc line second edge faces the direction of the second special-shaped straight line sixth edge, and a second special-shaped sealing step which is arranged in a gap is formed between the second special-shaped straight line first edge and the second special-shaped straight line sixth edge;

the shape of the three-level outer guide cylinder on the right single side surface of the axial section of the outer pipe is a third differential structure, and the third differential structure comprises:

a third differential straight line first side;

a second edge of a third different-shaped arc line, wherein one end of the second edge of the third different-shaped arc line is connected with one end of the first edge of the third different-shaped straight line;

a third edge of a third differential straight line, which forms an angle alpha 4 with the first edge of the third differential straight line, wherein the angle alpha 4 is the same as the angle alpha 2;

one end of a third edge of the third differential straight line is connected with the other end of the second edge of the third differential arc line;

a fourth edge of the third differential straight line, which forms an angle α 5 with the third edge of the third differential straight line, wherein the angle α 5 is the same as the angle α 3;

one end of the fourth edge of the third differential straight line is connected with the other end of the third edge of the third differential straight line;

a fifth edge of the third different-shaped straight line, which is parallel to the first edge of the third different-shaped straight line, wherein one end of the fifth edge of the third different-shaped straight line is connected with the other end of the fourth edge of the third different-shaped straight line;

a sixth edge of the third differential straight line, which is perpendicular to the fifth edge of the third differential straight line, wherein one end of the sixth edge of the third differential straight line is connected with the other end of the fifth edge of the third differential straight line, and the other end of the sixth edge of the third differential straight line is connected with the other end of the first edge of the third differential straight line; the arc-shaped bulge of the second edge of the third different-shaped arc line faces to the direction of the sixth edge of the third different-shaped straight line, and a third different-shaped sealing step which is absent between the first edge of the third different-shaped straight line and the sixth edge of the third different-shaped straight line is formed;

the shape of the right single-sided surface of the axial section of the outer pipe of the first-stage inner guide cylinder is a fourth special-shaped structure, and the fourth special-shaped structure comprises:

a fourth special-shaped straight first edge;

a fourth special-shaped straight line second edge which is perpendicular to the fourth special-shaped straight line first edge, wherein one end of the fourth special-shaped straight line second edge is connected with one end of the fourth special-shaped straight line first edge;

a fourth special-shaped straight line third edge which is parallel to the fourth special-shaped straight line first edge, wherein one end of the fourth special-shaped straight line third edge is connected with the other end of the fourth special-shaped straight line second edge, and the fourth special-shaped straight line third edge and the fourth special-shaped straight line first edge are arranged on the same side surface of the fourth special-shaped straight line second edge;

and one end of the fourth special-shaped straight line fourth edge is connected with one end of the fourth special-shaped straight line third edge, the fourth special-shaped straight line fourth edge and the fourth special-shaped straight line third edge form an angle alpha 6, and the angle alpha 6 is an angle alpha 2 complement angle.

And one end of the fifth edge of the fourth special-shaped straight line is connected with the other end of the fourth special-shaped straight line, the other end of the fifth edge of the fourth special-shaped straight line is connected with the other end of the first edge of the fourth special-shaped straight line, the fifth edge of the fourth special-shaped straight line and the fourth edge of the fourth special-shaped straight line form an angle alpha 7, and the angle alpha 7 is the same as the angle alpha 3.

The shape of the right single-sided surface of the axial section of the outer pipe of the second-stage inner guide cylinder is a fifth special-shaped structure, and the fifth special-shaped structure comprises:

a fifth special-shaped straight first edge;

a fifth special-shaped straight line second edge which is perpendicular to the fourth special-shaped straight line first edge, wherein one end of the fifth special-shaped straight line second edge is connected with one end of the fourth special-shaped straight line first edge;

a fifth special-shaped straight line third edge which is parallel to the fifth special-shaped straight line first edge, wherein one end of the fifth special-shaped straight line third edge is connected with the other end of the fifth special-shaped straight line second edge, and the fifth special-shaped straight line third edge and the fifth special-shaped straight line first edge are arranged on the same side of the fifth special-shaped straight line second edge;

a fourth side of the fifth special-shaped straight line and the third side of the fifth special-shaped straight line form an angle alpha 8, and the angle alpha 8 is the same as the angle alpha 6;

one end of a fourth edge of the fifth special-shaped straight line is connected with the other end of the third edge of the fifth special-shaped straight line;

and one end of the fifth special-shaped straight line is connected with the other end of the fourth edge of the fifth special-shaped straight line, the fifth special-shaped straight line and the fourth edge of the fifth special-shaped straight line form an angle alpha 9, and the angle alpha 9 is the same as the angle alpha 3.

A sixth edge of a fifth special-shaped arc line, wherein one end of the sixth edge of the fifth special-shaped arc line is connected with the other end of the fifth edge of the fifth special-shaped straight line, an arc-shaped bulge of the sixth edge of the fifth special-shaped arc line faces the direction of the second edge of the fifth special-shaped straight line, and a fifth special-shaped sealing step which is arranged in a gap is formed between the first edge of the fifth special-shaped straight line and the second edge of the fifth special-shaped straight line;

the shape of the right single side surface of the axial section of the outer pipe of the three-level inner guide cylinder is a sixth special-shaped structure, and the sixth special-shaped structure comprises:

a sixth special-shaped straight first edge;

the sixth special-shaped straight line second edge is connected with one end of the sixth special-shaped straight line first edge, and the sixth special-shaped straight line second edge is perpendicular to the sixth special-shaped straight line first edge;

a sixth special-shaped straight line third edge which is parallel to the sixth special-shaped straight line first edge, wherein one end of the sixth special-shaped straight line third edge is connected with the other end of the sixth special-shaped straight line second edge, and the sixth special-shaped straight line third edge and the sixth special-shaped straight line first edge are arranged on the same side of the sixth special-shaped straight line second edge;

a sixth special-shaped straight line fourth edge, which forms an angle alpha 10 with the sixth special-shaped straight line third edge, wherein the angle alpha 10 is the same as the angle alpha 1;

one end of the fourth edge of the sixth special-shaped straight line is connected with the other end of the third edge of the sixth special-shaped straight line;

a fifth edge of a sixth special-shaped arc line, wherein one end of the fifth edge of the sixth special-shaped arc line is connected with the other end of the fourth edge of the sixth special-shaped straight line, the other end of the fifth edge of the sixth special-shaped arc line is connected with the other end of the first edge of the sixth special-shaped straight line, an arc-shaped bulge of the fifth edge of the sixth special-shaped arc line faces the direction of the second edge of the sixth special-shaped straight line, and a sixth special-shaped sealing step which is arranged in a gap is formed between the first edge of the sixth special-shaped straight line and the second edge of the sixth special-shaped straight line;

the shape of excircle draft tube at outer tube axial section right unilateral is seventh dysmorphism structure, and seventh dysmorphism structure includes:

the seventh special-shaped straight line first side,

one end of the second side of the seventh special-shaped arc line is connected with one end of the first side of the seventh special-shaped straight line;

a third edge of the seventh special-shaped straight line, wherein one end of the third edge of the seventh special-shaped straight line is connected with one end of the second edge of the seventh special-shaped arc line, and the other end of the third edge of the seventh special-shaped straight line is connected with the other end of the first edge of the seventh special-shaped straight line, and an arc-shaped bulge on the second edge of the seventh special-shaped arc line backs on an included angle formed by the third edge of the seventh special-shaped straight line and the first edge of the seventh special-shaped straight line;

an eighth special-shaped straight first edge;

one end of the second edge of the eighth special-shaped arc line is connected with one end of the first edge of the eighth special-shaped straight line;

a third side of the eighth special-shaped straight line;

one end of a third edge of the eighth special-shaped straight line is connected with one end of a second edge of the eighth special-shaped arc line, and the other end of the third edge of the eighth special-shaped straight line is connected with the other end of the first edge of the eighth special-shaped straight line, wherein an arc-shaped bulge of the second edge of the eighth special-shaped arc line faces away from an included angle formed by the third edge of the eighth special-shaped straight line and the first edge of the eighth special-shaped straight line;

the included angle between the first edge of the seventh special-shaped straight line and the central axis of the outer tube, the included angle between the first edge of the eighth special-shaped straight line and the central axis of the outer tube and the included angle between the second edge of the first special-shaped straight line and the central axis of the outer tube are the same; the included angle between the third edge of the seventh special-shaped straight line and the central axis of the outer tube, the included angle between the third edge of the eighth special-shaped straight line and the central axis of the outer tube and the included angle between the fourth edge of the fourth special-shaped straight line and the central axis of the outer tube are the same.

7. The downhole fluid one-way conduction high-speed stop valve according to claim 6, wherein the first special-shaped straight line first edge is connected with the upper gland in a sealing manner through a first special-shaped sealing step, and a sealing material is filled in a gap between the first special-shaped sealing step and the upper gland; the third edge of the first special-shaped straight line is connected with the first edge of the second special-shaped straight line in a sealing mode through a second special-shaped sealing step, and a sealing material is filled in a gap between the second special-shaped sealing step and the third edge of the first special-shaped straight line; the fifth edge of the second special-shaped straight line is in sealing connection with the first edge of the third special-shaped straight line through a third special-shaped sealing step, and a gap between the third special-shaped sealing step and the fifth edge of the second special-shaped straight line is filled with a sealing material; one end of the first edge of the fourth special-shaped straight line is contacted with the limiting step of the inner guide cylinder, the third edge of the fourth special-shaped straight line is connected with the first edge of the fifth special-shaped straight line through a fifth special-shaped sealing step, and a gap between the fifth special-shaped sealing step and the third edge of the fourth special-shaped straight line is filled with a sealing material; the third edge of the fifth special-shaped straight line is in sealing connection with the first edge of the sixth special-shaped straight line through a sixth special-shaped sealing step, and a sealing material is filled in a gap between the sixth special-shaped sealing step and the third edge of the fifth special-shaped straight line; the first special-shaped straight line second edge, the second special-shaped straight line fourth edge, the third special-shaped straight line fourth edge, the fourth special-shaped straight line fifth edge, the fifth special-shaped straight line fifth edge and the sixth special-shaped straight line fourth edge are parallel to each other, the second special-shaped straight line third edge, the third special-shaped straight line third edge, the fourth special-shaped straight line fourth edge and the fifth special-shaped straight line fourth edge are parallel to each other, the radians of the second special-shaped arc line second edge, the third special-shaped arc line second edge, the fifth special-shaped arc line sixth edge, the sixth special-shaped arc line fifth edge, the seventh special-shaped arc line second edge and the eighth special-shaped arc line second edge are all the same, an outer circular guide cylinder first positioning claw is arranged at the intersection of the seventh special-shaped straight line first edge and the seventh special-shaped straight line second edge of the circular structure outer circular guide cylinder, and the outer circular guide cylinder first positioning claws are distributed in a circular array relative to the center of the outer circular guide cylinder in the radial section, the first locating claw of circle draft tube is provided with circle draft tube second locating claw in the crossing department on outer tube radial cross section for the center of circle draft tube in the circle draft tube, and the first locating claw of circle draft tube is provided with circle draft tube second locating claw in the crossing department on the first side of the eighth dysmorphism straight line of circle draft tube in the circle structure and the crossing department on eighth dysmorphism straight line second limit, the first locating claw of circle draft tube is the circular array distribution in outer tube radial cross section for the center of circle draft tube in the circle draft tube, and the second locating claw of circle draft tube is provided with circle draft tube second locating claw in the crossing department on the second limit of the eighth dysmorphism straight line of circle draft tube in the circle structure, circle draft tube second locating claw is the circular array distribution in outer tube radial cross section for the center of circle draft tube, first locating claw of draft tube, The lengths of the second positioning claw of the outer guide cylinder, the first positioning claw of the inner guide cylinder and the second positioning claw of the inner guide cylinder are the same as the width of a gap between the inner guide cylinder and the outer guide cylinder.

8. The downhole fluid one-way conduction high-speed stop valve according to claim 1, wherein the first-stage outer guide cylinder, the second-stage outer guide cylinder and the third-stage outer guide cylinder are sequentially nested and embedded relative to the central tube at the position where the first-stage outer guide cylinder, the second-stage outer guide cylinder and the third-stage outer guide cylinder are attached to the outer tube in the accommodating space from bottom to top, the first-stage inner guide cylinder, the second-stage inner guide cylinder and the third-stage inner guide cylinder are sequentially nested and embedded on the central tube in the accommodating space from bottom to top, and the outer guide cylinder and the inner guide cylinder are also reversely and inversely installed in the outer tube.

9. The downhole fluid one-way communication high-speed stop valve as claimed in claim 7, wherein the sealing material is a sealing strip.

10. A method for applying a downhole fluid one-way conduction high-speed stop valve, which is applied to the downhole fluid one-way conduction high-speed stop valve according to any one of claims 1 to 9, and comprises the following steps:

s1, connecting the central pipe to a water injection well process pipe column and putting the central pipe into a water injection layer, wherein ground injection water enters a liquid outlet hole of the central pipe through the process pipe column;

s2, the injected fluid flows through a continuous structure channel formed by filling the inner guide cylinder, the outer guide cylinder, the inner guide cylinder and the outer guide cylinder in the outer pipe, enters the second liquid outlet hole of the flywheel type stop ring and the third liquid outlet hole of the outer pipe, and is injected into the stratum.