Gas well borehole load linear discrete anti-slipping tool and self-lifting pipe string

Abstract

The application discloses a kind of gas well shaft load linear discrete anti-slip tool and self-lifting pipe column, belong to lifting pipe column in oil and gas field development, its purpose is to solve the technical problems of the existing pipe column, more back liquid, high downhole liquid holdup and low liquid carrying capacity.It includes multiple discrete units, discrete unit includes gas well shaft load linear discrete anti-slip tool, outer ring sleeve;Gas well shaft load linear discrete anti-slip tool is equipped with central passage;Gas well shaft load linear discrete anti-slip tool outside is provided with one-way check valve, lower flow channel, Tesla type anti-slip valve, upper flow channel, jet atomizing nozzle;The positive direction of one-way check valve and Tesla type anti-slip valve is downstream to upstream direction.Collaborative effect of one-way check valve and Tesla type anti-slip valve effectively inhibits the liquid back fall in anti-slip flow channel, enhances gas lifting capacity, reduces downhole liquid holdup and improves liquid carrying capacity, thereby significantly improves drainage gas recovery efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil and gas field development, and relates to a lifting string, in particular to a gas well borehole load linear discrete anti-slip tool and self-lifting string. BACKGROUND

[0002] With the extension of the development time of gas fields, liquid loading in gas wells is a common problem in the later stage of gas field development. The main reasons are the decrease of gas flow rate, the decrease of gas well productivity, the invasion of formation water, the restriction of wellbore structure and the imbalance of gas-liquid ratio, which leads to the gradual decrease of formation pressure and the weakening of the lifting capacity of gas wells, and the liquid in the wellbore cannot be effectively carried to the ground. The final result may also cause water flooding of gas wells, and even complete shutdown. Liquid loading in gas wells not only reduces the production efficiency and service life of gas wells, but also increases the equipment maintenance cost and environmental risk. Therefore, in view of the problem of liquid loading, many drainage gas recovery process measures have been developed, such as foam drainage, gas lift drainage, electric submersible pump drainage, etc., the purpose of which is to ensure the normal production of gas wells and the efficient development of gas reservoirs.

[0003] However, during the development of gas fields, the problem of liquid loading in water-producing gas wells still seriously restricts the stable production capacity and economic benefit of gas wells, especially for water-producing gas wells or gas wells in the middle and later stages of development. The gas flow rate is often lower than the critical liquid carrying flow rate, which leads to the fact that the liquid in the wellbore cannot be effectively carried to the ground, thereby forming liquid loading. At present, the existing drainage gas recovery technologies, such as velocity string and foam drainage gas recovery, although can enhance the liquid carrying capacity by increasing the gas flow rate or reducing the liquid surface tension, but in the process of continuous lifting, with the gas-liquid two-phase flow rising to a certain height, the liquid phase inevitably produces slip phenomenon due to the unbalanced action of gravity, interfacial tension and gas phase drag, which leads to the backfall of liquid and the increase of liquid holdup rate in the downhole. This slip effect not only increases the flow resistance, but also reduces the gas lifting efficiency, forcing the system to consume more energy to maintain production, and ultimately limiting the applicability and economy of the technology. Therefore, how to effectively inhibit the liquid slip and optimize the gas-liquid collaborative lifting has become a key challenge to improve the efficiency of drainage gas recovery.

[0004] The invention disclosed in CN118582190A discloses an oil and gas well liquid accumulation-free production and discharge system, which comprises a casing and a production pipe column arranged in the oil and gas well and inserted into the oil and gas liquid surface. The production pipe column is arranged in the casing to form an annular gap between the production pipe column and the casing. The production pipe column is sequentially connected by a plurality of oil and gas pipes, a plurality of anti-slip and anti-falling liquid accumulators, and a plurality of anti-slip and anti-falling gas injectors. One anti-slip and anti-falling liquid accumulator or anti-slip and anti-falling gas injector is arranged every several oil and gas pipes, and one anti-slip and anti-falling gas injector is arranged every several anti-slip and anti-falling liquid accumulators. The lower the position of the production pipe column, the fewer the number of anti-slip and anti-falling liquid accumulators spaced between adjacent anti-slip and anti-falling gas injectors. The anti-slip and anti-falling liquid accumulator comprises a pipe body, a gas main passage arranged in the center of the pipe body, an annular groove arranged on the inner wall of the pipe body and connected with the gas passage, a gas branch passage arranged in the annular groove, and an annular liquid receiving groove with an opening facing upward. The gas branch passage passes through the annular liquid receiving groove. The principle is that when the pressure difference decreases, the liquid on the inner wall of the production pipe column slides down along the pipe wall. During the sliding process, when the liquid slides to the anti-slip and anti-falling liquid accumulator, it will drip into the annular liquid receiving groove along the annular flow guide plate. The gas-liquid mixture running upward along the gas main passage will have some gas enter the gas branch passage when passing through the gas inlet. During the running of the gas along the gas branch passage, the liquid received in the annular liquid receiving groove is blown out, and the liquid is carried into the gas main passage again, thereby avoiding the sliding of the liquid at the pipe wall and improving the liquid carrying capacity.

[0005] Like the above-mentioned production and discharge system, the prior art solves the problem of liquid carrying in gas wells by arranging a liquid receiving groove or similar structure on the pipe wall to contain and collect part of the sliding liquid, and then blowing the liquid out through the gas pressure and discharging it to the wellhead through the main passage. However, this structure still has some defects: 1. The other end of each liquid receiving groove or similar structure is provided with an open gas inlet (such as the gas inlet 8 in the above-mentioned patent), and the excess liquid in the liquid receiving groove can slide down through the gas inlet, causing the liquid to fall back, increasing the liquid holdup rate in the well, and reducing the liquid carrying capacity; 2. Due to the location of the gas inlet, the size of the annular liquid receiving groove, and the length of the flow guide plate extending into the liquid receiving groove, part of the liquid is always collected in the liquid receiving groove and the gas inlet and cannot be blown out, and the liquid collected in the liquid receiving grooves and gas inlets at multiple positions in the gas well accumulates a large amount of liquid; 3. Arranging the liquid receiving groove and the bent passage on the radial side wall of the pipe column will make the side wall of the pipe column thicker, which also increases the weight and manufacturing cost of the pipe column. SUMMARY

[0006] The purpose of the present application is to solve the technical problems of excessive back-falling liquid, high liquid holdup rate, and low liquid carrying capacity in the existing pipe column, and to provide a gas well shaft load linear discrete anti-slip and anti-falling tool and a self-lifting pipe column.

[0007] The present application specifically adopts the following technical solutions to achieve the above-mentioned purpose.

[0008] The gas well borehole load linear discrete anti-slippage tool and self-lifting pipe column comprise a plurality of discrete units arranged along the trajectory direction of the gas well, each of the discrete units comprising a gas well borehole load linear discrete anti-slippage tool, and the gas well borehole load linear discrete anti-slippage tool is provided with an outer ring sleeve.

[0009] The gas well borehole load linear discrete anti-slippage tool is provided with a central passage in the axial direction; and a one-way check valve, a lower flow passage, a Tesla anti-slippage valve, an upper flow passage and a jet atomizing nozzle are sequentially arranged on the outer side of the gas well borehole load linear discrete anti-slippage tool from the upstream to the downstream to form an anti-slippage flow passage; the forward direction of the one-way check valve and the Tesla anti-slippage valve is from the upstream to the downstream, and the reverse direction of the one-way check valve and the Tesla anti-slippage valve is from the downstream to the upstream.

[0010] Further, the gas well borehole load linear discrete anti-slippage tool comprises a guide floating plate check nipple, a load anti-slippage nipple and a jet atomizing nipple arranged sequentially from the upstream to the downstream, the central holes of the guide floating plate check nipple, the load anti-slippage nipple and the jet atomizing nipple are sequentially connected to form the central passage, the one-way check valve is arranged on the outer side of the bottom of the guide floating plate check nipple, the Tesla anti-slippage valve is arranged on the outer side of the middle of the load anti-slippage nipple, the jet atomizing nozzle is arranged on the top of the jet atomizing nipple, the lower flow passage is arranged on the outer side of the upper end of the guide floating plate check nipple, the outer side of the lower end of the load anti-slippage nipple or the outer side of the connection part of the guide floating plate check nipple and the load anti-slippage nipple, and the upper flow passage is arranged on the outer side of the upper end of the load anti-slippage nipple, the outer side of the lower end of the jet atomizing nipple or the outer side of the connection part of the load anti-slippage nipple and the jet atomizing nipple.

[0011] Further, the one-way check valve comprises an inner guide sleeve and an outer guide sleeve arranged outside the inner guide sleeve, the bottom of the inner guide sleeve and the bottom of the outer guide sleeve are connected through a bottom strip-shaped baffle, the top of the inner guide sleeve and the top of the outer guide sleeve are connected through a top strip-shaped baffle, and a one-way check floating plate is arranged between the inner guide sleeve and the outer guide sleeve.

[0012] A water inlet is arranged between the two adjacent bottom strip-shaped baffles, the outer diameter of the top of the inner guide sleeve is smaller than the outer diameter of the bottom, the outer diameter of the one-way check floating plate is matched with the inner diameter of the top strip-shaped baffle, the inner diameter of the one-way check floating plate is matched with the outer diameter of the bottom of the inner guide sleeve, and the one-way check floating plate can move back and forth between the bottom strip-shaped baffles.

[0013] Further, the inner guide sleeve is provided with a boss, the top strip-shaped baffle is an L-shaped baffle, and a gap exists between the inner side of the vertical section of the top strip-shaped baffle and the outer side of the corresponding position of the inner guide sleeve.

[0014] The one-way check floating plate is sleeved outside the boss and can slide on the boss and the vertical section of the top strip-shaped baffle.

[0015] Further, the lower flow channel is a groove provided outside the upper end of the guide floating plate check nipple or outside the lower end of the load anti-slip nipple or outside the connection position of the guide floating plate check nipple and the load anti-slip nipple, and the flow channel is formed between the inner side of the groove and the inner wall of the outer ring sleeve.

[0016] The upper flow channel is a groove provided outside the upper end of the load anti-slip nipple or outside the lower end of the jet atomization nipple or outside the connection position of the load anti-slip nipple and the jet atomization nipple, and the flow channel is formed between the inner side of the groove and the inner wall of the outer ring sleeve.

[0017] Further, the Tesla type anti-slip valve comprises a Tesla type load anti-slip flow channel provided on the outer cylindrical surface of the load anti-slip nipple of the gas well bore load linear discrete anti-slip tool, the Tesla type load anti-slip flow channel adopts a Tesla valve structure, and the resistance of fluid flowing from upstream to downstream in the Tesla valve structure is smaller than the resistance of liquid flowing from downstream to upstream in the Tesla valve structure.

[0018] Further, the Tesla type load anti-slip flow channel is a groove provided on the outer cylindrical surface of the load anti-slip nipple, and the flow channel is formed between the inner wall of the groove and the inner wall of the jet atomization nipple of the gas well bore load linear discrete anti-slip tool.

[0019] Further, the Tesla type load anti-slip flow channel is spirally arranged on the outer cylindrical surface of the load anti-slip nipple.

[0020] Further, the central hole of the jet atomization nipple is arranged as a jet cavity with a gradually decreasing inner diameter from upstream to downstream, the diameter of the exit hole of the jet cavity is the same as and coaxial with the diameter of the central jet hole of the jet atomization nozzle, and a plurality of small jet holes which are in communication with the anti-slip flow channel are uniformly distributed around the central jet hole of the jet atomization nozzle.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. In the application, a plurality of discrete units are arranged in the trajectory direction of the gas well, and the plurality of discrete units can prevent slip from the plurality of positions of the gas well, reduce the liquid holdup rate in the well, and improve the liquid carrying capacity; a one-way check valve and a Tesla type anti-slip valve are arranged outside the linear discrete anti-slip tool of the gas well wellbore load, and the positive direction of the one-way check valve and the Tesla type anti-slip valve is from upstream to downstream (upstream in the well and downstream in the well), part of the liquid is discharged to the wellhead through the central channel, and part of the liquid is discharged to the wellhead through the one-way check valve and the Tesla type anti-slip valve; when the pressure in the well is reduced, the liquid slips and falls back, in this process, the one-way check valve is closed, the resistance of the liquid falling back in the Tesla type anti-slip valve is increased, the one-way check valve and the Tesla type anti-slip valve cooperate to effectively inhibit the liquid falling back in the anti-slip flow passage, enhance the gas lifting capacity, reduce the liquid holdup rate in the well, and improve the liquid carrying capacity, thereby significantly improving the drainage gas recovery efficiency and prolonging the stable production period of the gas well.

[0023] 2. In the application, there is no liquid storage dead angle in the one-way check valve and the Tesla type anti-slip valve, when the pressure in the well is large, the liquid in the one-way check valve and the Tesla type anti-slip valve will be discharged (or a small part will be left), the liquid discharge efficiency in the well is high, and the discharge quality is high.

[0024] 3. In the application, the anti-slip flow passage is mostly arranged in the axial and circumferential spiral direction outside the linear discrete anti-slip tool of the gas well wellbore load, and the side wall of the pipe string is not arranged in a detour structure along the axial direction of the linear discrete anti-slip tool of the gas well wellbore load; therefore, on the basis of meeting the safety requirements of tool operation, the thickness of the pipe wall of the pipe string can be made thinner, and the weight and manufacturing cost of the tool are significantly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The structure diagram of the anti-slip tool of the application;

[0026] Figure 2 The application Figure 1 The structure diagram of the A-A section of the application;

[0027] Figure 3 The application Figure 1 The enlarged structure diagram of the one-way floating plate guide sleeve of the application;

[0028] Figure 4 The combined half-section structure diagram of the anti-slip tool and the outer ring sleeve of the application;

[0029] The attached diagram is labeled as follows: 001-Guide float check valve short section, 002-Load anti-slip short section, 003-Jet atomizing short section, 004-Boss, 005-Central channel, 101-One-way check valve float, 102-One-way float guide sleeve, 201-Tesla-type load anti-slip flow channel, 202-Lower flow channel, 301-Jet atomizing nozzle, 302-Jet cavity, 303-Upper flow channel, 1000-Gas wellbore load linear discrete anti-slip tool, 2000-Outer ring sleeve, 10201-Outer guide sleeve, 10202-Inner guide sleeve, 10203-Bottom strip baffle, 10204-Top strip baffle. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0031] Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment provides a linear discrete anti-slip tool for gas wellbore load and a self-lifting tubing string, which is used to suppress / reduce liquid slippage, improve the liquid carrying capacity of water-producing gas wells, and improve drainage and gas production efficiency.

[0034] like Figure 4 As shown, the tubing string comprises multiple discrete units arranged along the gas well trajectory. The term "discrete" in the title of this application refers to the multiple discrete units being distributed discretely along the gas well trajectory. Figure 4 It only illustrates the structure of a discrete unit.

[0035] Each discrete unit includes a gas wellbore load linear discrete anti-slip tool 1000 and an outer ring sleeve 2000, with the outer ring sleeve 2000 fitted over the gas wellbore load linear discrete anti-slip tool 1000.

[0036] The outer ring sleeve 2000 is a hollow cylinder with a certain thickness and length, which can be used to house the gas well shaft load linear discrete anti-slip tool 1000 inside it. Figure 4 The diagram only shows the structure and arrangement of the Tesla-style load-bearing anti-slip flow channel, and does not show the thickness of the 2000mm outer ring sleeve.

[0037] like Figure 2As shown, the gas wellbore load linear discrete anti-slip tool 1000 has a central channel 005 arranged along its axial direction. The central channel 005 is coaxial with the gas wellbore load linear discrete anti-slip tool 1000. The lower part of the central channel 005 is a cylindrical channel, and the top of the central channel 005 is a conical channel that is smaller at the top and larger at the bottom, which is intended to form a jet cavity 302.

[0038] like Figure 1 , Figure 2 As shown, a one-way check valve is provided at the bottom outer side of the gas wellbore load linear discrete anti-slip tool 1000. A one-way check float 101 is installed inside the one-way check valve. The one-way check valve can be opened and closed by moving the one-way check float 101 up and down. A lower flow channel 202 is formed radially inward on the lower middle part of the outer side of the gas wellbore load linear discrete anti-slip tool 1000. A Tesla-style anti-slip valve is provided in the middle of the outer side of the gas wellbore load linear discrete anti-slip tool 1000. An upper flow channel 303 is formed radially inward on the upper middle part of the outer side of the gas wellbore load linear discrete anti-slip tool 1000. A jet atomizing nozzle 301 is provided at the top of the gas wellbore load linear discrete anti-slip tool 1000. The outer surface of the jet atomizing nozzle 301 is in close contact with the inner surface of the outer ring sleeve 2000. When the gas wellbore load linear discrete anti-slip tool 1000 is fitted inside the outer ring sleeve 2000, the one-way check valve, the lower flow channel 202, the Tesla-type anti-slip valve, the upper flow channel 303, and the jet atomizing nozzle 301 can be connected in sequence to form a circumferentially closed, open-end anti-slip flow channel.

[0039] Both the one-way check valve and the Tesla-style anti-slip valve have a forward direction from upstream to downstream (upstream in the well and downstream above ground, i.e., from downhole to above ground), while both have a reverse direction from downstream to upstream.

[0040] The specific process of this lifting string in operation is as follows:

[0041] In the production process of a gas well, as water is produced in the gas well, gas-water two-phase fluid enters the wellbore and flows in the upstream-to-downstream direction (upstream in the downhole and downstream in the wellhead, i.e. from the downhole to the wellhead direction). When the gas and water pass through the discrete unit, a first part of the gas and water moves downstream through the central passage 005; a second part of the gas and water pushes the one-way check floating plate 101 in the one-way check valve to enter the one-way check valve and continues to move downstream, and after passing through the lower flow passage 202, the gas and water enter the Tesla anti-slip valve tangentially, and the gas and water move along the flow passage of the Tesla anti-slip valve, and when the gas and water flow in the positive direction of the Tesla anti-slip valve, the resistance is small, and the gas and water can more easily move to the upper flow passage 303 in the downstream and enter the jet atomizing nozzle 301. Under the action of the jet atomizing nozzle 301, the gas and water are fully mixed and further atomized. At this time, the large amount of gas and water moving to the jet cavity 302 through the central passage 005 will produce accelerated impact movement, quickly reach the jet atomizing nozzle 301, further drive the second part of the gas and water to accelerate movement, so as to further carry all the gas and water at the jet atomizing nozzle 301 to a more distant downstream, improve the liquid carrying capacity of the gas, and realize the lifting of the gas and water in the discrete unit.

[0042] Similarly, the gas and water can realize continuous lifting in multiple discrete units. However, when the pressure in the gas well is insufficient, the lifting capacity of a certain discrete unit decreases, and the liquid slips. Due to the action of gravity and frictional resistance, the liquid will slip downward along the inner wall of the wellbore. When the slipped liquid enters any discrete unit, on the one hand, part of the liquid enters the anti-slip flow passage of the anti-slip tool 1000 through the jet atomizing nozzle 301. Since the liquid falls in the downstream-to-upstream direction, the Tesla anti-slip valve is reversed in the path, and the flow resistance becomes very large, making it difficult for the slipped liquid to continue to fall. On the other hand, the one-way check floating plate 101 in the one-way check valve moves downward under the action of gravity or / and the downward slipping liquid and closes the one-way check valve. More liquid will be contained in the space of the upper flow passage 303 under the action of the Tesla anti-slip valve and the one-way check valve, effectively preventing the liquid from falling while ensuring the efficient lifting of other discrete units, which helps to improve the lifting capacity of the entire wellbore and realize more efficient exploitation.

[0043] Embodiment 2

[0044] On the basis of the first embodiment, the present embodiment provides a specific structure of the gas well wellbore load linear discrete anti-slip tool 1000.

[0045] As Figure 1 , Figure 2As shown, the gas wellbore load linear discrete anti-slip tool 1000 includes a guide float check valve short section 001, a load anti-slip short section 002, and a jet atomizing short section 003 arranged sequentially from downstream to upstream (upstream in the wellbore and downstream in the wellbore, i.e., from downstream to upstream). The outer surface of the large-diameter part of the load anti-slip short section 002 is in close contact with the inner surface of the outer ring sleeve 2000.

[0046] The central through holes of the guide float check section 001, the load anti-slip section 002, and the jet atomizing section 003 are all coaxial and interconnected, forming a central channel 005.

[0047] A one-way check valve is located on the bottom outer side of the guide float check section 001, a Tesla-type anti-slip valve is located on the middle outer side of the load anti-slip section 002, and a jet atomizing nozzle 301 is located on the top of the jet atomizing section 003. The lower flow channel 202 is located on the upper outer side of the guide float check section 001, the lower outer side of the load anti-slip section 002, or the outer side of the connection between the guide float check section 001 and the load anti-slip section 002. The upper flow channel 303 is located on the upper outer side of the load anti-slip section 002, the lower outer side of the jet atomizing section 003, or the outer side of the connection between the load anti-slip section 002 and the jet atomizing section 003.

[0048] A one-way check valve, a lower flow channel 202, a Tesla-type anti-slip valve, an upper flow channel 303, and a jet atomizing nozzle 301 are provided on the outside of the gas wellbore load linear discrete anti-slip tool 1000. When the gas wellbore load linear discrete anti-slip tool 1000 is fitted inside the outer ring sleeve 2000, the one-way check valve, the lower flow channel 202, the Tesla-type anti-slip valve, the upper flow channel 303, and the jet atomizing nozzle 301 are connected to form a circumferentially closed and open-end anti-slip flow channel.

[0049] Example 3

[0050] Based on either Embodiment 1 or Embodiment 2, this embodiment provides a specific structure for a one-way check valve.

[0051] like Figure 3 As shown, the one-way check valve includes a one-way float guide sleeve 102 sleeved outside the guide float check section 001. The one-way float guide sleeve 102 includes an inner guide sleeve 10202, and an outer guide sleeve 10201 is sleeved on the inner guide sleeve 10202. The outer side of the outer guide sleeve 10201 is in close contact with the inner surface of the outer ring sleeve 2000. The inner guide sleeve 10202 and the outer guide sleeve 10201 are coaxial.

[0052] The bottom of the inner guide sleeve 10202 and the bottom of the outer guide sleeve 10201 are connected by the bottom strip baffle 10203. The bottom strip baffle 10203 is provided in multiple groups, and the multiple groups of bottom strip baffles 10203 are arranged radially along the inner guide sleeve 10202 in a radial manner. An included angle exists between adjacent two bottom strip baffles 10203, so as to form a water inlet between the inner guide sleeve 10202, the outer guide sleeve 10201 and the adjacent two bottom strip baffles 10203, and liquid can enter the one-way check valve through the water inlet. The top of the inner guide sleeve 10202 and the top of the outer guide sleeve 10201 are connected by the top strip baffle 10204, and the top strip baffle 10204 is arranged in the same manner as the bottom strip baffle 10203. In addition, the one-way check floating plate 101 is further arranged between the inner guide sleeve 10202 and the outer guide sleeve 10201, and the one-way check floating plate 101 can slide back and forth along the axial direction between the inner guide sleeve 10202 and the outer guide sleeve 10201.

[0053] The outer diameter of the top of the inner guide sleeve 10202 is smaller than the outer diameter of the bottom, that is, the inner guide sleeve 10202 is a conical frustum with the top smaller than the bottom. The outer diameter of the one-way check floating plate 101 is matched with the inner diameter of the top strip baffle 10204, and the inner diameter of the one-way check floating plate 101 is matched with the outer diameter of the bottom of the inner guide sleeve 10202. The one-way check floating plate 101 can move back and forth between the bottom strip baffles 10203.

[0054] In operation, the gas and water push the one-way check floating plate 101 to move upwards. The outer wall of the one-way check floating plate 101 is always attached to the outer guide sleeve 10201, while the inner wall of the one-way check floating plate 101 is separated from the outer wall of the inner guide sleeve 10202. The one-way check valve is conducted, the gas and water enter the one-way check valve through the water inlet, and flow to the lower flow channel 202, the Tesla anti-slip valve, the upper flow channel 303 and the jet flow atomizing nozzle 301 through the gap between the inner wall of the one-way check floating plate 101 and the outer wall of the inner guide sleeve 10202. When the pressure in the gas well is insufficient, the one-way check floating plate 101 will move downwards under the action of gravity, and when the pressure is too low, the one-way check floating plate 101 will move to the lowest position. The inner wall of the one-way check floating plate 101 is attached to the outer wall of the inner guide sleeve 10202, the one-way check valve is blocked, and the liquid in the anti-slip flow channel cannot continue to slip.

[0055] As preferred, the boss 004 can be sleeved outside the inner guide sleeve 10202, and the outer surface of the boss 004 is a cylindrical surface. The top strip-shaped baffle 10204 is an L-shaped baffle, the horizontal section of the top strip-shaped baffle 10204 is arranged along the radial direction of the outer guide sleeve 10201, the vertical section of the top strip-shaped baffle 10204 is connected to the top of the boss 004, and there is a gap between the inner side of the vertical section of the top strip-shaped baffle 10204 and the outer side of the corresponding position of the inner guide sleeve 10202; since the inner guide sleeve 10202 has a structure of being small at the top and large at the bottom, the size of the gap becomes larger and larger from bottom to top.

[0056] The one-way check floating plate 101 is sleeved outside the boss 004, and when the gas and water push the one-way check floating plate 101 to move upward, the one-way check floating plate 101 can slide on the boss 004 and the vertical section of the top strip-shaped baffle 10204.

[0057] Embodiment 4

[0058] On the basis of the above-mentioned embodiment, the embodiment provides a specific structure of the lower flow channel 202 and the upper flow channel 303.

[0059] The lower flow channel 202 is a groove arranged outside the upper end of the guide floating plate check short section 001 or outside the lower end of the load anti-slip short section 002 or outside the connection between the guide floating plate check short section 001 and the load anti-slip short section 002. When the gas well borehole load linear discrete anti-slip tool 1000 is sleeved in the outer ring sleeve 2000, a circumferentially closed flow channel with two open ends is formed between the inner side of the groove and the inner wall of the outer ring sleeve 2000.

[0060] Similarly, the upper flow channel 303 is a groove arranged outside the upper end of the load anti-slip short section 002 or outside the lower end of the jet atomization short section 003 or outside the connection between the load anti-slip short section 002 and the jet atomization short section 003. When the gas well borehole load linear discrete anti-slip tool 1000 is sleeved in the outer ring sleeve 2000, a circumferentially closed flow channel with two open ends is formed between the inner side of the groove and the inner wall of the outer ring sleeve 2000.

[0061] Embodiment 5

[0062] On the basis of the above-mentioned embodiment, the embodiment provides a specific structure of the Tesla type anti-slip valve.

[0063] The Tesla type anti-slip valve is a Tesla type load anti-slip flow channel 201 arranged on the outer cylindrical surface of the load anti-slip short section 002 of the gas well borehole load linear discrete anti-slip tool 1000. The Tesla type load anti-slip flow channel 201 adopts a Tesla valve structure, and the structure of the Tesla valve structure is as shown in Figure 1 、 Figure 4 .

[0064] The Tesla-type load anti-slip flow channel 201 is a groove on the outer cylindrical surface of the load anti-slip short section 002. The groove of the Tesla valve structure is spirally arranged along the outer cylindrical surface of the load anti-slip short section 002. When the gas wellbore load linear discrete anti-slip tool 1000 is sleeved inside the outer ring sleeve 2000, a circumferentially closed, open-end flow channel is formed between the inner side of the groove of the Tesla valve structure and the inner wall of the outer ring sleeve 2000. Therefore, the resistance of fluid flowing from downstream to upstream (upstream in the wellbore and downstream in the wellbore, i.e., from downhole to uphole) in the Tesla valve structure is less than the resistance of fluid flowing from upstream to downstream in the Tesla valve structure.

[0065] like Figure 1 As shown, this Tesla valve structure achieves unidirectional fluid flow characteristics through a special structural design, exhibiting low forward flow resistance and high reverse flow resistance. The Tesla valve structure consists of a series of alternating pipe branches, each branch dividing into two paths—a straight or inclined channel and a semi-circular loop. During forward flow (the design direction), the liquid primarily flows along the straight path, with the branch structure generating only slight frictional resistance. During reverse flow, the fluid is forced into the semi-circular loop, colliding with the fluid in subsequent branches to create turbulence, generating resistance up to 200 times greater than the forward flow resistance.

[0066] Example 6

[0067] Based on the above embodiment, this embodiment provides a specific structure for a jet atomization short circuit.

[0068] The central hole of the jet atomizing section 003 is configured as a jet cavity 302 with an inner diameter that gradually decreases from downstream to upstream. The diameter of the outlet hole of the jet cavity 302 is the same as and coaxial with the diameter of the central nozzle of the jet atomizing nozzle 301. The jet atomizing nozzle 301 also has multiple small nozzles that are evenly distributed around the central nozzle and are connected to the anti-slip flow channel.

[0069] The first part of the gas and water moves through the central channel 005 to the jet chamber 302. The large amount of gas and water will generate accelerated impact motion and quickly reach the jet atomizing nozzle 301. The second part of the gas and water enters the jet atomizing nozzle 301 after passing through the Tesla-type anti-slip valve. Under the action of the jet atomizing nozzle 301, the two parts of gas and water will generate sufficient gas-water mixing, realize atomization, and move to a more distant downstream location, thereby improving the liquid carrying capacity of the gas and realizing the lifting of gas and water in this discrete unit.

Claims

1. A gas well borehole load linear discrete anti-slippage tool and self-lifting pipe column, characterized in that: The application relates to a gas well anti-slippage tool, which comprises a plurality of discrete units arranged along the direction of a gas well track, each of the discrete units comprising a gas well shaft load linear discrete anti-slippage tool (1000) which is externally sleeved with an outer sleeve (2000). The gas well shaft load linear discrete anti-slippage tool (1000) is internally provided with a central passage (005) along the axial direction; the outer side of the gas well shaft load linear discrete anti-slippage tool (1000) is provided with a one-way check valve, a lower flow channel (202), a Tesla anti-slippage valve, an upper flow channel (303) and a jet atomizing nozzle (301) which are sequentially communicated to form an anti-slippage flow channel in the upstream-to-downstream direction; the forward directions of the one-way check valve and the Tesla anti-slippage valve are both in the upstream-to-downstream direction, and the reverse directions of the one-way check valve and the Tesla anti-slippage valve are both in the downstream-to-upstream direction.

2. The gas well borehole load linear discrete anti-unloading tool and self-lifting pipe column of claim 1, characterized in that: The gas well shaft load linear discrete anti-slippage tool (1000) comprises a guide floating plate check nipple (001), a load anti-slippage nipple (002) and a jet atomizing nipple (003) which are sequentially arranged in the upstream-to-downstream direction; the central holes of the guide floating plate check nipple (001), the load anti-slippage nipple (002) and the jet atomizing nipple (003) are sequentially communicated to form the central passage (005); the one-way check valve is arranged at the bottom outer side of the guide floating plate check nipple (001); the Tesla anti-slippage valve is arranged at the middle outer side of the load anti-slippage nipple (002); the jet atomizing nozzle (301) is arranged at the top of the jet atomizing nipple (003); the lower flow channel (202) is arranged at the outer side of the upper end of the guide floating plate check nipple (001), the outer side of the lower end of the load anti-slippage nipple (002) or the connection position between the guide floating plate check nipple (001) and the load anti-slippage nipple (002); and the upper flow channel (303) is arranged at the outer side of the upper end of the load anti-slippage nipple (002), the outer side of the lower end of the jet atomizing nipple (003) or the connection position between the load anti-slippage nipple (002) and the jet atomizing nipple (003).

3. The gas well borehole load linear discrete anti-unloading tool and self-lifting pipe column according to claim 1 or 2, characterized in that: The one-way check valve comprises an inner guide sleeve (10202) and an outer guide sleeve (10201) which is sleeved outside the inner guide sleeve (10202); the bottom of the inner guide sleeve (10202) is connected with the bottom of the outer guide sleeve (10201) through a bottom strip baffle (10203); the top of the inner guide sleeve (10202) is connected with the top of the outer guide sleeve (10201) through a top strip baffle (10204); and a one-way check floating plate (101) is arranged between the inner guide sleeve (10202) and the outer guide sleeve (10201). The water inlet is arranged between two adjacent bottom strip baffles (10203), the outer diameter of the top of the inner guide sleeve (10202) is smaller than the outer diameter of the bottom, the outer diameter of the one-way check floating plate (101) is matched with the inner diameter of the top strip baffle (10204), the inner diameter of the one-way check floating plate (101) is matched with the outer diameter of the bottom of the inner guide sleeve (10202), and the one-way check floating plate (101) can move back and forth between the bottom strip baffle (10203) and the bottom strip baffle (10203).

4. The gas well borehole load linear discrete anti-unloading tool and self-lifting pipe column of claim 3, characterized in that: The inner guide sleeve (10202) is externally sleeved with a boss (004), the top strip baffle (10204) is an L-shaped baffle, there is a gap between the inner side of the vertical section of the top strip baffle (10204) and the outer side of the corresponding position of the inner guide sleeve (10202), and the bottom of the vertical section of the top strip baffle (10204) is connected with the top of the boss (004); The one-way check floating plate (101) is sleeved outside the boss (004) and can slide on the boss (004) and the vertical section of the top strip baffle (10204).

5. The gas well borehole load linear discrete anti-slip tool and self-lifting pipe column of claim 2, characterized in that: The lower flow channel (202) is a groove arranged on the outer side of the upper end of the guide floating plate check short section (001), the outer side of the lower end of the load anti-slip short section (002), or the connection between the guide floating plate check short section (001) and the load anti-slip short section (002), and a flow channel is formed between the inner side of the groove and the inner wall of the outer ring sleeve (2000); The upper flow channel (303) is a groove arranged on the outer side of the upper end of the load anti-slip short section (002), the outer side of the lower end of the jet atomization short section (003), or the connection between the load anti-slip short section (002) and the jet atomization short section (003), and a flow channel is formed between the inner side of the groove and the inner wall of the outer ring sleeve (2000).

6. The gas well borehole load linear discrete anti-unloading tool and self-lifting pipe column of claim 1 or 2, characterized in that: The Tesla type anti-slip valve includes a Tesla type load anti-slip flow channel (201) arranged on the outer cylindrical surface of the load anti-slip short section (002) of the gas well borehole load linear discrete anti-slip tool (1000), the Tesla type load anti-slip flow channel (201) adopts a Tesla valve structure, and the resistance of fluid flowing from upstream to downstream in the Tesla valve structure is smaller than the resistance of liquid flowing from downstream to upstream in the Tesla valve structure.

7. The gas well borehole load linear discrete anti-unloading tool and self-lifting pipe column of claim 6, characterized in that: The Tesla type load anti-slip flow channel (201) is a groove arranged on the outer cylindrical surface of the load anti-slip short section (002), and a flow channel is formed between the inner wall of the groove and the inner wall of the jet atomization short section (003) of the gas well borehole load linear discrete anti-slip tool (1000).

8. The gas well borehole load linear discrete anti-unloading tool and self- lifting pipe column of claim 6, characterized in that: The Tesla type load anti-slip flow channel (201) is arranged in a spiral on the outer cylindrical surface of the load anti-slip short section (002).

9. The gas well borehole load linear discrete anti-unloading tool and self-lifting pipe column of claim 1 or 2, characterized in that: The center hole of the jet atomization nipple (003) is arranged as a jet cavity (302) with gradually decreasing inner diameter from upstream to downstream, and the hole diameter of the exit hole of the jet cavity (302) is the same as and coaxial with the hole diameter of the center jet hole of the jet atomization nozzle (301); the jet atomization nozzle (301) is also uniformly provided with a plurality of small jet holes in communication with the anti-slip separation flow channels around the center jet hole.

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