Gas well shaft load linear discrete anti-slip tool and self-operated lifting tubular column

Abstract

The invention discloses a gas well shaft load linear discrete type anti-slip tool and a self-operated lifting tubular column, belongs to lifting tubular columns in oil and gas field development, and aims to solve the technical problems of more falling liquid, high underground liquid holdup and low liquid carrying capacity in an existing tubular column. The device comprises a plurality of discrete units, and each discrete unit comprises a gas well shaft load linear discrete anti-slip tool and an outer ring sleeve; a center channel is arranged in the gas well shaft load linear discrete anti-slip tool. A one-way check valve, a lower runner, a Tesla type anti-slip valve, an upper runner and a jet atomizing nozzle are arranged on the outer side of the gas well shaft load linear discrete type anti-slip tool; the forward direction of the one-way check valve and the forward direction of the Tesla type anti-slip valve are both the direction from the downstream to the upstream. Through the synergistic effect of the one-way check valve and the Tesla type anti-slip valve, liquid in the anti-slip flow channel is effectively restrained from falling back, the gas lifting capacity is enhanced, the underground liquid holdup rate is reduced, the liquid carrying capacity is improved, and therefore the drainage gas production efficiency is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas field development, and relates to a lifting pipe string, in particular to a gas wellbore load linear discrete anti-slip tool and a self-lifting pipe string. Background Art

[0002] As gas field development progresses, liquid accumulation in water-producing gas wells is a common problem in the later stages of gas field development. The main causes are reduced gas flow rate, decreased gas well productivity, formation water intrusion, wellbore structural limitations, and an imbalance in the gas-liquid ratio. These factors lead to a gradual decrease in formation pressure, a weakening of the gas well's lifting capacity, and an inability to effectively carry the liquid in the wellbore to the surface. This ultimately results in flooding of the gas well and even complete shutdown of production. Liquid accumulation in gas wells not only reduces the well's production efficiency and lifespan, but also increases equipment maintenance costs and environmental risks. Therefore, to address the problem of liquid accumulation, a number of drainage and gas production process measures have been developed, such as foam drainage, gas lift drainage, and electric submersible pump drainage, all with the goal of ensuring normal gas well production and efficient reservoir development.

[0003] However, during gas field development, liquid accumulation in water-producing wells continues to severely constrain stable production and economic efficiency. This is especially true for wells prone to water production or those entering the middle to late stages of development. Gas flow rates often fall below the critical liquid-carrying velocity, preventing the effective transport of liquid from the wellbore to the surface, leading to liquid accumulation. Existing drainage gas recovery technologies, such as velocity strings and foam drainage gas recovery, enhance liquid-carrying capacity by increasing gas velocity or reducing liquid surface tension. However, as the gas-liquid two-phase flow rises to a certain height during continuous lift, the liquid phase inevitably slips due to the imbalance of gravity, interfacial tension, and gas drag, causing the liquid to fall back and increasing downhole liquid holdup. This slippage effect not only increases flow resistance but also reduces gas lift efficiency, forcing the system to consume more energy to maintain production, ultimately limiting the technology's applicability and economic viability. Therefore, effectively suppressing liquid slippage and optimizing gas-liquid coordinated lift remain key challenges in improving drainage gas recovery efficiency.

[0004] The invention with publication number CN118582190A discloses an oil and gas well liquid-free production and drainage system, including a casing and a production tubing string arranged in the oil and gas well and with the bottom inserted below the oil and gas liquid level. The production tubing string is arranged in the casing, thereby forming an annular space gap between the production tubing string and the casing; the production tubing string is composed of a plurality of oil and gas pipes, a plurality of anti-slip liquid reservoirs and a plurality of anti-slip air injectors connected end to end, an anti-slip liquid reservoir or an anti-slip air injector is arranged every several oil and gas pipes, and an anti-slip air injector is arranged every several anti-slip liquid reservoirs, and the lower the production tubing string is, the fewer the number of anti-slip liquid reservoirs between adjacent anti-slip air injectors. The anti-slip liquid reservoir includes a tube body, a main gas channel disposed at the center of the tube body, an annular groove disposed on the inner wall of the tube body and connected to the gas channel, a gas branch channel disposed within the annular groove, and an upwardly opening annular liquid receiving groove, wherein the gas branch channel passes through the annular liquid receiving groove. The principle is as follows: when the pressure differential decreases, the liquid on the inner wall of the production string slides down the tube wall. During this process, when the liquid slides down to the anti-slip liquid reservoir, it drips into the annular liquid receiving groove along the annular guide plate. When the gas-liquid mixture flows upward along the gas main pipeline and passes through the air inlet, some gas enters the gas branch channel. As the gas flows along the gas branch channel, the liquid received in the annular liquid receiving groove is blown out and carried back into the gas main channel, thereby preventing the liquid from sliding off the tube wall and improving the liquid carrying capacity.

[0005] Like the above-mentioned production and drainage system, the existing technology for solving the problem of liquid carrying in gas wells mostly sets up a liquid receiving trough or similar structure on the pipe wall to accommodate and collect part of the sliding liquid through the liquid receiving trough or similar structure, and then blows out the liquid through air pressure and discharges it to the wellhead through the main channel. However, this structure still has some defects: 1. The other end of each liquid receiving trough or similar structure is provided with an open air inlet (such as the air inlet 8 in the above-mentioned patent), and the excess liquid in the liquid receiving trough can slide downward through the air inlet, causing the liquid to fall back, the downhole liquid holding rate to increase, and the liquid carrying capacity to decrease; 2. Due to the location of the opening of the air inlet, the size of the annular liquid receiving trough and the length of the guide plate extending into the liquid receiving trough, part of the liquid is always collected in the liquid receiving trough and near the air inlet and cannot be blown out. The liquid collected by the liquid receiving troughs and air inlets at multiple positions in the gas well accumulates, and the amount of liquid is also huge; 3. The radial arrangement of liquid receiving troughs and bending passages on the side wall of the pipe string will make the side wall of the pipe string thicker, which also increases the weight of the pipe string and the manufacturing cost. Summary of the Invention

[0006] The purpose of the present invention is to provide a gas wellbore load linear discrete anti-slip tool and a self-lifting pipe string in order to solve the technical problems of large amount of liquid falling back in the existing pipe string, high downhole liquid holdup and low liquid carrying capacity.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A gas wellbore load linear discrete anti-slip tool and a self-lifting pipe string, comprising a plurality of discrete units arranged along the gas well trajectory, each discrete unit comprising a gas wellbore load linear discrete anti-slip tool, the gas wellbore load linear discrete anti-slip tool being outer-sheathed with an outer ring sleeve; A central channel is arranged inside the linear discrete anti-slip tool for gas well bore load along the axial direction; a one-way check valve, a lower flow channel, a Tesla-type anti-slip valve, an upper flow channel, and a jet atomizing nozzle are arranged on the outside of the linear discrete anti-slip tool for gas well bore load from upstream to downstream, which are connected in sequence to form an anti-slip flow channel; the forward direction of the one-way check valve and the Tesla-type anti-slip valve is from upstream to downstream, and the reverse direction of the one-way check valve and the Tesla-type anti-slip valve is from downstream to upstream.

[0008] Furthermore, the gas wellbore load linear discrete anti-slip tool includes a guide float check nipple, a load anti-slip nipple, and a jet atomization nipple, which are arranged in sequence from upstream to downstream. The center holes of the guide float check nipple, the load anti-slip nipple, and the jet atomization nipple are connected in sequence to form a central channel. The one-way check valve is arranged on the outside of the bottom of the guide float check nipple, the Tesla anti-slip valve is arranged on the outside of the middle of the load anti-slip nipple, the jet atomization nozzle is arranged on the top of the jet atomization nipple, the lower flow channel is arranged on the outside of the upper end of the guide float check nipple or the outside of the lower end of the load anti-slip nipple or the outside of the connection between the guide float check nipple and the load anti-slip nipple, and the upper flow channel is arranged on the outside of the upper end of the load anti-slip nipple or the outside of the lower end of the jet atomization nipple or the outside of the connection between the load anti-slip nipple and the jet atomization nipple.

[0009] Furthermore, the one-way check valve includes an internal guide sleeve and an external guide sleeve sleeved outside the internal guide sleeve. The bottom of the internal guide sleeve is connected to the bottom of the external guide sleeve by a bottom strip baffle, and the top of the internal guide sleeve is connected to the top of the external guide sleeve by a top strip baffle. A one-way check float is provided between the internal guide sleeve and the external guide sleeve. A water inlet is provided between two adjacent bottom strip baffles, the outer diameter of the top of the internal guide sleeve is smaller than the outer diameter of the bottom, the outer diameter of the one-way check float is adapted to the inner diameter of the top strip baffle, and the inner diameter of the one-way check float is adapted to the outer diameter of the bottom of the internal guide sleeve, and the one-way check float can move back and forth between the bottom strip baffles.

[0010] Furthermore, a boss is provided on the outer cover of the internal guide sleeve, and the top strip baffle is an L-shaped baffle. There is a gap between the inner side surface of the vertical section of the top strip baffle and the outer side surface of the corresponding position of the internal guide sleeve, and the bottom of the vertical section of the top strip baffle is connected to the top of the boss; The one-way non-return floating plate is sleeved outside the boss and can slide on the boss and the vertical section of the top strip baffle.

[0011] Furthermore, the lower flow channel is a groove provided on the outer side of the upper end of the guide floating plate check sub or the outer side of the lower end of the load anti-slip sub or the outer side of the connection between the guide floating plate check sub and the load anti-slip sub, and a flow channel is formed between the inner side of the groove and the inner wall of the outer ring sleeve; The upper flow channel is a groove arranged on the outer side of the upper end of the load anti-slip short section or the outer side of the lower end of the jet atomization short section or the outer side of the connection between the load anti-slip short section and the jet atomization short section, and a flow channel is formed between the inner side of the groove and the inner wall of the outer ring sleeve.

[0012] Furthermore, the Tesla-type anti-slip valve includes a Tesla-type load anti-slip flow channel arranged on the outer cylindrical surface of the load anti-slip short section of the gas wellbore load linear discrete anti-slip tool. The Tesla-type load anti-slip flow channel adopts a Tesla valve structure. The resistance of the fluid when flowing from upstream to downstream in the Tesla valve structure is less than the resistance of the liquid when flowing from downstream to upstream in the Tesla valve structure.

[0013] Furthermore, the Tesla-type load anti-slip flow channel is a groove provided on the outer cylindrical surface of the load anti-slip short section, and a flow channel is formed between the inner wall of the groove and the inner wall of the jet atomization short section of the gas wellbore load linear discrete anti-slip tool.

[0014] Furthermore, the Tesla-type load anti-slip flow channel is spirally arranged on the outer cylindrical surface of the load anti-slip short section.

[0015] Furthermore, the center hole of the jet atomization short section is set as a jet cavity with an inner diameter gradually decreasing from upstream to downstream, and the aperture of the outlet hole of the jet cavity is the same as the aperture of the central spray hole of the jet atomization nozzle and is coaxial; the jet atomization nozzle is also evenly distributed around the central spray hole with multiple small spray holes connected to the anti-slip flow channel.

[0016] The beneficial effects of the present invention are as follows: 1. In the present invention, multiple discrete units are provided in the direction of the gas well trajectory. Through the multiple discrete units, anti-slip treatment can be performed from multiple positions of the gas well, thereby reducing the downhole liquid holdup and improving the liquid carrying capacity. By providing a one-way check valve and a Tesla-type anti-slip valve on the outside of the gas wellbore load linear discrete anti-slip tool, and the positive direction of the one-way check valve and the Tesla-type anti-slip valve is from upstream to downstream (downhole is upstream, and uphole is downstream), part of the liquid is discharged to the wellhead through the central channel. In the process, part of the liquid will be discharged to the wellhead through the one-way check valve and the Tesla anti-skid valve; when the pressure in the well decreases, the liquid will slip and fall back downward. During this process, the one-way check valve is closed, and the resistance of the liquid falling back in the Tesla anti-skid valve increases. The one-way check valve and the Tesla anti-skid valve work together to effectively suppress the liquid from falling back in the anti-skid flow channel, enhance the gas lifting capacity, reduce the downhole liquid holdup, and improve the liquid carrying capacity, thereby significantly improving the drainage and gas production efficiency and extending the stable production period of the gas well.

[0017] 2. In the present invention, there is no dead angle for liquid storage in the one-way check valve and the Tesla-type anti-slip valve. When the downhole pressure is high, the liquid in the one-way check valve and the Tesla-type anti-slip valve will be discharged (or only a small amount will remain), and the downhole liquid discharge efficiency and discharge quality are high.

[0018] 3. In the present invention, the anti-slip flow channels are mostly arranged in the axial and circumferential spirals along the outer side of the linear discrete anti-slip tool for the gas well bore load, and the side wall of the pipe string is not arranged in a circuitous structure along the axial direction of the linear discrete anti-slip tool for the gas well bore load; therefore, the wall thickness of the pipe string can be made thinner on the basis of meeting the safety requirements of the tool construction operation, and the weight of the tool and the manufacturing cost are significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of the anti-slip tool of the present invention; Figure 2 The present invention Figure 1 Schematic diagram of the AA section structure; Figure 3 The present invention Figure 1 Figure 102: Enlarged structural diagram of the one-way floating plate guide sleeve; Figure 4 A schematic diagram of a half-section structure of the combination of the anti-slip tool and the outer ring sleeve of the present invention; Among them, the figure markings are: 001-guide float check short section, 002-load anti-slip short section, 003-jet atomization short section, 004-boss, 005-center channel, 101-one-way check float, 102-one-way float guide sleeve, 201-Tesla type load anti-slip flow channel, 202-lower flow channel, 301-jet atomization nozzle, 302-jet cavity, 303-upper flow channel, 1000-gas wellbore load linear discrete anti-slip tool, 2000-outer ring sleeve, 10201-external guide sleeve, 10202-inner guide sleeve, 10203-bottom strip baffle, 10204-top strip baffle. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0021] Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0022] Example 1 This embodiment provides a gas wellbore load linear discrete anti-slip tool and a self-lifting pipe string, which are used to inhibit / reduce liquid slippage, improve the liquid carrying capacity of water-producing gas wells, and improve water drainage and gas production efficiency.

[0023] like Figure 4 As shown, the string includes multiple discrete units, and the multiple discrete units are arranged along the trajectory direction of the gas well. The "discrete type" in the title of the subject of this application means that the multiple discrete units are distributed in a discrete manner along the trajectory direction of the gas well ( Figure 4 It only illustrates the structure of a discrete unit).

[0024] Each discrete unit includes a gas well bore load linear discrete anti-slip tool 1000 and an outer ring sleeve 2000. The outer ring sleeve 2000 is sleeved on the gas well bore load linear discrete anti-slip tool 1000.

[0025] The outer ring sleeve 2000 is a hollow cylinder with a certain thickness and length, and can be used to set the gas wellbore load linear discrete anti-slip tool 1000 inside it ( Figure 4 Only the structure and setting method of the Tesla-type load anti-slip flow channel are shown, and the thickness of the outer ring sleeve 2000 is not shown).

[0026] like Figure 2As shown, the gas wellbore load linear discrete anti-slip tool 1000 has a central channel 005 disposed along its axis. The central channel 005 is coaxial with the gas wellbore load linear discrete anti-slip tool 1000. The lower portion of the central channel 005 is a cylindrical channel, and the top of the central channel 005 is a conical channel that is narrower at the top and wider at the bottom, which is used to form the jet cavity 302.

[0027] like Figure 1 、 Figure 2 As shown, the outer bottom of the gas wellbore load linear discrete anti-slip tool 1000 is provided with a one-way check valve, and a one-way check float 101 is provided inside the one-way check valve. The one-way check float 101 can be opened and closed by moving the one-way check float 101 up and down. The lower middle portion of the outer side of the gas wellbore load linear discrete anti-slip tool 1000 is radially concave to form a lower flow channel 202. The middle portion of the outer side of the gas wellbore load linear discrete anti-slip tool 1000 is provided with a Tesla-type anti-slip valve. The upper middle portion of the outer side of the gas wellbore load linear discrete anti-slip tool 1000 is radially concave to form an upper flow channel 303. The top of the gas wellbore load linear discrete anti-slip tool 1000 is provided with a jet atomizing nozzle 301. The outer surface of the jet atomizing nozzle 301 is tightly fitted with the inner surface of the outer ring sleeve 2000. When the gas wellbore load linear discrete anti-slip tool 1000 is installed in the outer ring sleeve 2000, the one-way check valve, the lower flow channel 202, the Tesla anti-slip valve, the upper flow channel 303, and the jet atomizing nozzle 301 can be connected in sequence to form an anti-slip flow channel that is circumferentially closed and open at both ends.

[0028] The forward direction of the one-way check valve and Tesla-type anti-slip valve is from upstream to downstream (downhole is upstream, uphole is downstream, that is, downhole to uphole), and the reverse direction of the one-way check valve and Tesla-type anti-slip valve is from downstream to upstream.

[0029] When the lifting string is working, the specific process is as follows: During the production process of a gas well, as the gas well produces water, a two-phase fluid of gas and water enters the wellbore and flows along the wellbore from upstream to downstream (downhole is upstream, uphole is downstream, that is, downhole to uphole). When the gas and water pass through the discrete units, the first part of the gas and water will move downstream through the central channel 005; the second part of the gas and water will push the one-way check float 101 in the one-way check valve upward to enter the one-way check valve and continue to move downstream, passing through the lower flow channel 202 and then tangentially entering the Tesla anti-slip valve. The gas and water move along the flow channel of the Tesla anti-slip valve, and the gas and water have less resistance when flowing in the forward direction of the Tesla anti-slip valve, so they can move more easily to the upper flow channel 303 downstream and enter the jet. Inside the atomizing nozzle 301, sufficient gas-water mixing is generated under the action of the jet atomizing nozzle 301, and further atomization is achieved; at this time, a large amount of gas and water in the first part moving from the central channel 005 to the jet cavity 302 will produce an accelerated impact motion, quickly reaching the jet atomizing nozzle 301, further driving the second part to achieve accelerated motion of the atomized gas and water, thereby further carrying all the gas and water at the jet atomizing nozzle 301 to a farther downstream, thereby improving the liquid carrying capacity of the gas and achieving the lifting of the gas and water in the discrete unit.

[0030] Similarly, gas and water can achieve continuous lifting in multiple discrete units mentioned above. However, when the pressure in the gas well is insufficient, the lifting capacity of a certain discrete unit decreases and liquid slips. Due to the effects of gravity and friction resistance, the liquid will slide along the inner wall of the wellbore. When the slipped page enters any discrete unit, on the one hand, part of the liquid enters the anti-slip flow channel of the gas wellbore load linear discrete anti-slip tool 1000 along the jet atomizing nozzle 301. Since the liquid falls back from downstream to upstream, the Tesla anti-slip valve is in the opposite direction on the path, and its flow resistance becomes very large, making it difficult for the slipped liquid to continue to fall back. On the other hand, the one-way check float 101 in the one-way check valve moves downward under the action of gravity and / or the liquid sliding downward and closes the one-way check valve. Under the action of the Tesla anti-slip valve and the one-way check valve, more liquid will be accommodated in the space of the upper flow channel 303, which effectively prevents the liquid from falling back while ensuring the efficient lifting of other discrete units, helping to improve the lifting capacity of the entire gas wellbore and achieve more efficient mining.

[0031] Example 2 On the basis of the first embodiment, this embodiment provides a specific structure of a gas wellbore load linear discrete anti-slip tool 1000.

[0032] like Figure 1 、 Figure 2As shown, the gas wellbore load linear discrete anti-slip tool 1000 includes a guide floating plate check short section 001, a load anti-slip short section 002, and a jet atomization short section 003, which are arranged in sequence from downstream to upstream (downhole is upstream, uphole is downstream, that is, downhole to uphole). The outer surface of the large-diameter part of the load anti-slip short section 002 is tightly matched with the inner surface of the outer ring sleeve 2000.

[0033] The central through holes of the guide floating plate check sub 001 , the load anti-slip sub 002 , and the jet atomizing sub 003 are all coaxial and interconnected to form a central channel 005 .

[0034] The one-way check valve is located outside the bottom of the guide float check sub 001, the Tesla anti-slip valve is located outside the middle of the load anti-slip sub 002, and the jet atomizing nozzle 301 is located at the top of the jet atomizing sub 003. The lower flow channel 202 is located outside the upper end of the guide float check sub 001, outside the lower end of the load anti-slip sub 002, or outside the connection between the guide float check sub 001 and the load anti-slip sub 002. The upper flow channel 303 is located outside the upper end of the load anti-slip sub 002, outside the lower end of the jet atomizing sub 003, or outside the connection between the load anti-slip sub 002 and the jet atomizing sub 003.

[0035] 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 arranged 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 sleeved in 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 an anti-slip flow channel that is circumferentially closed and open at both ends.

[0036] Example 3 Based on the first or second embodiment, this embodiment provides a specific structure of a one-way check valve.

[0037] like Figure 3 As shown, the one-way check valve includes a one-way floating plate guide sleeve 102 which is sleeved on the outside of the guide floating plate check short section 001. The one-way floating plate guide sleeve 102 includes an internal guide sleeve 10202. The internal guide sleeve 10202 is outer-mounted with an external guide sleeve 10201. The outer side surface of the external guide sleeve 10201 is tightly fitted with the inner surface of the outer ring sleeve 2000. The internal guide sleeve 10202 is coaxial with the external guide sleeve 10201.

[0038] The bottom of the inner guide sleeve 10202 is connected to the bottom of the outer guide sleeve 10201 by a bottom strip baffle 10203. Multiple groups of bottom strip baffles 10203 are provided, radially arranged along the radial direction of the inner guide sleeve 10202. An angle exists between adjacent bottom strip baffles 10203, thereby forming a water inlet between the inner guide sleeve 10202, the outer guide sleeve 10201, and adjacent bottom strip baffles 10203. Liquid can enter the one-way check valve through the water inlet. The top of the inner guide sleeve 10202 is connected to the top of the outer guide sleeve 10201 by a top strip baffle 10204. The top strip baffle 10204 is arranged in the same manner as the bottom strip baffle 10203. In addition, a one-way non-return floating plate 101 is provided between the inner guide sleeve 10202 and the outer guide sleeve 10201 . The one-way non-return floating plate 101 can slide back and forth between the inner guide sleeve 10202 and the outer guide sleeve 10201 along their axial directions.

[0039] The outer diameter of the top of the internal guide sleeve 10202 is smaller than the outer diameter of the bottom, that is, the internal guide sleeve 10202 is a cone shape with a small top and a large bottom; the outer diameter of the one-way check float 101 is adapted to the inner diameter of the top strip baffle 10204, and the inner diameter of the one-way check float 101 is adapted to the outer diameter of the bottom of the internal guide sleeve 10202, and the one-way check float 101 can move back and forth between the bottom strip baffle 10203 and the bottom strip baffle 10203.

[0040] During operation, the gas and water push the one-way check float 101 upward, and the outer wall of the one-way check float 101 always fits with the outer guide sleeve 10201, while the inner wall of the one-way check float 101 separates from the outer wall of the inner guide sleeve 10202. The one-way check valve is turned on, and the gas and water enter the one-way check valve through the water inlet and flow to the bottom through the gap between the inner wall of the one-way check float 101 and the outer wall of the inner guide sleeve 10202. The lower flow channel 202, the Tesla-type anti-slip valve, the upper flow channel 303 and the jet atomizing nozzle 301; when the pressure in the gas well is insufficient, the one-way check float 101 will move downward under the action of gravity, and when the pressure is too low, the one-way check float 101 will move down to the lowest position, and the inner wall of the one-way check float 101 will fit with the outer wall of the internal guide sleeve 10202, the one-way check valve will be blocked, and the liquid in the anti-slip flow channel cannot continue to slip.

[0041] Preferably, a boss 004 may be provided on the outer surface of the inner guide sleeve 10202, and the outer surface of the boss 004 is a cylindrical surface. The top strip baffle 10204 is an L-shaped baffle, with the horizontal section of the top strip baffle 10204 arranged along the radial direction of the outer guide sleeve 10201. The vertical section of the top strip baffle 10204 is connected to the top of the boss 004, and a gap is formed between the inner side surface of the vertical section of the top strip baffle 10204 and the outer side surface of the corresponding position of the inner guide sleeve 10202. Since the inner guide sleeve 10202 is a structure with a small top and a large bottom, the size of the gap increases from bottom to top.

[0042] The one-way check float 101 is sleeved outside the boss 004. When the gas and water push the one-way check float 101 upward, the one-way check float 101 can slide on the boss 004 and the vertical section of the top strip baffle 10204.

[0043] Example 4 On the basis of the above embodiment, this embodiment provides a specific structure of a lower flow channel 202 and an upper flow channel 303 .

[0044] Lower flow channel 202 is a groove located on the outside of the upper end of guide float check sub 001, the outside of the lower end of load anti-slip sub 002, or the outside of the connection between guide float check sub 001 and load anti-slip sub 002. When gas wellbore load linear discrete anti-slip tool 1000 is installed within outer ring sleeve 2000, a circumferentially closed flow channel with open ends is formed between the inner side of the groove and the inner wall of outer ring sleeve 2000.

[0045] Similarly, upper flow channel 303 is a groove disposed on the outer side of the upper end of load-preventing sub 002, the outer side of the lower end of jet atomizing sub 003, or the outer side of the connection between load-preventing sub 002 and jet atomizing sub 003. When gas wellbore load linear discrete anti-slip tool 1000 is sleeved within outer annular sleeve 2000, a circumferentially closed flow channel with open ends is formed between the inner side of the groove and the inner wall of outer annular sleeve 2000.

[0046] Example 5 On the basis of the above embodiment, this embodiment provides a specific structure of a Tesla-type anti-slip valve.

[0047] The Tesla type anti-slip valve is a Tesla type load anti-slip flow channel 201 provided on the outer cylindrical surface of the load anti-slip short section 002 of the gas wellbore load linear discrete anti-slip tool 1000. The Tesla type load anti-slip flow channel 201 adopts a Tesla valve structure. The structure of the Tesla valve structure is as follows: Figure 1 、 Figure 4 shown.

[0048] The Tesla-style load-preventing slip channel 201 is a groove disposed on the outer cylindrical surface of the load-preventing slip nipple 002. The groove of the Tesla valve structure is arranged in a spiral pattern along the outer cylindrical surface of the load-preventing slip nipple 002. When the gas wellbore load linear discrete anti-slip tool 1000 is sleeved within the outer ring sleeve 2000, a circumferentially closed flow channel with open ends 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 to fluid flow from downstream to upstream (downhole is upstream, uphole is downstream, that is, from downhole to uphole) within the Tesla valve structure is less than the resistance to fluid flow from upstream to downstream within the Tesla valve structure.

[0049] like Figure 1 As shown, the Tesla valve structure achieves unidirectional flow through a unique structural design, resulting in low resistance in the forward direction and high resistance in the reverse direction. The Tesla valve structure consists of a series of alternating pipe branches, each of which divides into two paths: a straight or inclined channel and a semi-circular loop. During forward flow (the design direction), the liquid primarily flows along a straight path, with the branching structure generating only slight frictional resistance. During reverse flow, the fluid is forced into the semi-circular loop, colliding with the fluid in the subsequent branches, creating turbulence and generating resistance up to 200 times that of the forward flow.

[0050] Example 6 On the basis of the above embodiment, this embodiment provides a specific structure of a jet atomization short circuit.

[0051] The central hole of the jet atomizing short section 003 is set as a jet cavity 302 whose inner diameter gradually decreases from downstream to upstream. The aperture of the outlet hole of the jet cavity 302 is the same as the aperture of the central spray hole of the jet atomizing nozzle 301 and is coaxial; the jet atomizing nozzle 301 also has multiple small spray holes evenly distributed around the central spray hole that are connected to the anti-slip flow channel.

[0052] The first part of the gas and water moves through the central channel 005 to the jet cavity 302, where a large amount of gas and water will produce 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 anti-slip valve; under the action of the jet atomizing nozzle 301, the two parts of gas and water produce sufficient gas-water mixing, achieve atomization, and move to a farther downstream, thereby improving the liquid carrying capacity of the gas and realizing the lifting of the gas and water in the discrete unit.

Claims

1. A linear discrete anti-slip tool for gas wellbore load and a self-lifting pipe string, characterized by: It comprises a plurality of discrete units arranged along the trajectory direction of the gas well, each discrete unit comprising a gas well bore load linear discrete anti-slipping tool (1000), and the gas well bore load linear discrete anti-slipping tool (1000) is provided with an outer ring sleeve (2000) on its outer shell; A central channel (005) is provided inside the gas wellbore load linear discrete anti-slip tool (1000) along the axial direction; 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) from upstream to downstream, which are sequentially connected to form an anti-slip flow channel; the forward direction of the one-way check valve and the Tesla type anti-slip valve is from upstream to downstream, and the reverse direction of the one-way check valve and the Tesla type anti-slip valve is from downstream to upstream.

2. The gas wellbore load linear discrete anti-slip tool and self-lifting string according to claim 1, characterized in that: A gas well bore load linear discrete anti-slip tool (1000) comprises a guide float check nipple (001), a load anti-slip nipple (002), and a jet atomizing nipple (003) which are sequentially arranged from upstream to downstream. The central holes of the guide float check nipple (001), the load anti-slip nipple (002), and the jet atomizing nipple (003) are sequentially connected to form a central channel (005). A one-way check valve is arranged on the outside of the bottom of the guide float check nipple (001), and a Tesla anti-slip valve is arranged in the middle of the load anti-slip nipple (002). On the outside, the jet atomizing nozzle (301) is arranged at the top of the jet atomizing short section (003), the lower flow channel (202) is arranged on the outside of the upper end of the guide floating plate check short section (001) or the outside of the lower end of the load anti-slip short section (002) or the outside of the connection between the guide floating plate check short section (001) and the load anti-slip short section (002), and the upper flow channel (303) is arranged on the outside of the upper end of the load anti-slip short section (002) or the outside of the lower end of the jet atomizing short section (003) or the outside of the connection between the load anti-slip short section (002) and the jet atomizing short section (003).

3. The gas wellbore load linear discrete anti-slip tool and self-lifting string according to claim 1 or 2, characterized in that: The one-way check valve comprises an internal guide sleeve (10202) and an external guide sleeve (10201) sleeved outside the internal guide sleeve (10202); the bottom of the internal guide sleeve (10202) and the bottom of the external guide sleeve (10201) are connected via a bottom strip baffle (10203); the top of the internal guide sleeve (10202) and the top of the external guide sleeve (10201) are connected via a top strip baffle (10204); and a one-way check float (101) is provided between the internal guide sleeve (10202) and the external guide sleeve (10201); A water inlet is provided between two adjacent bottom strip baffles (10203); the outer diameter of the top of the internal guide sleeve (10202) is smaller than the outer diameter of the bottom; the outer diameter of the one-way check float (101) is adapted to the inner diameter of the top strip baffle (10204); the inner diameter of the one-way check float (101) is adapted to the outer diameter of the bottom of the internal guide sleeve (10202); and the one-way check float (101) can move back and forth between the bottom strip baffles (10203) and the bottom strip baffles (10203).

4. The gas wellbore load linear discrete anti-slip tool and self-lifting string according to claim 3, characterized in that: The outer cover of the internal guide sleeve (10202) is provided with a boss (004), the top strip baffle (10204) is an L-shaped baffle, a gap exists between the inner side surface of the vertical section of the top strip baffle (10204) and the outer side surface of the corresponding position of the internal guide sleeve (10202), and the bottom of the vertical section of the top strip baffle (10204) is connected to the top of the boss (004); The one-way non-return 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 wellbore load linear discrete anti-slip tool and self-lifting pipe string according to claim 2, characterized in that: The lower flow channel (202) is a groove provided on the outer side of the upper end of the guide floating plate check short section (001) or the outer side of the lower end of the load anti-slip short section (002) or the outer side of 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 provided on the outer side of the upper end of the load anti-slip short section (002) or the outer side of the lower end of the jet atomization short section (003) or the outer side of 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 wellbore load linear discrete anti-slip tool and self-lifting string according to claim 1 or 2, characterized in that: The Tesla type anti-slip valve comprises a Tesla type load anti-slip flow channel (201) arranged on the outer cylindrical surface of a load anti-slip short section (002) of a gas wellbore load linear discrete anti-slip tool (1000). The Tesla type load anti-slip flow channel (201) adopts a Tesla valve structure. The resistance of the fluid when flowing from upstream to downstream in the Tesla valve structure is less than the resistance of the liquid when flowing from downstream to upstream in the Tesla valve structure.

7. The gas wellbore load linear discrete anti-slip tool and self-lifting string according to claim 6, characterized in that: The Tesla-type load anti-slip flow channel (201) is a groove provided 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 wellbore load linear discrete anti-slip tool (1000).

8. The gas wellbore load linear discrete anti-slip tool and self-lifting string according to claim 6, characterized in that: The Tesla type load anti-slip flow channel (201) is spirally arranged on the outer cylindrical surface of the load anti-slip short section (002).

9. The gas wellbore load linear discrete anti-slip tool and self-lifting string according to claim 1 or 2, characterized in that: The central hole of the jet atomizing nipple (003) is configured as a jet cavity (302) whose inner diameter gradually decreases from upstream to downstream. The aperture of the outlet hole of the jet cavity (302) is the same as the aperture of the central spray hole of the jet atomizing nozzle (301) and is coaxial. The jet atomizing nozzle (301) is also evenly distributed with a plurality of small spray holes connected to the anti-slip flow channel around the central spray hole.

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