A downhole automatic dosing device for foam drainage gas well

Abstract

The application discloses a kind of automatic dosing devices of foam drainage gas production downhole, it is related to the technical field of foam drainage gas production, including casing, gas pipe, medicine storage tank, the outside of the medicine storage tank is equipped with liquid outlet pump, and medicine storage tank is fixedly connected with suction tube between liquid outlet pump, the liquid outlet pump is fixedly connected with liquid outlet main pipe, and the liquid outlet main pipe is equipped with valve, the liquid outlet main pipe is fixedly connected with liquid outlet branch pipe, and the lower end of liquid outlet branch pipe is located in gas pipe, the liquid outlet branch pipe is equipped with differential pressure control valve, the lower end of liquid outlet branch pipe is closed and is fixedly connected with one-way liquid inlet pipe.Occupation is in: by controlling the speed, angle of medicament flow, so that medicament is effectively contacted with effusion quickly, simultaneously, the angle of medicament flow has reciprocating swing and the different selection of any angle in swing amplitude, more quickly improve the effective contact of medicament and effusion, improve the efficiency of effusion removal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foam drainage gas recovery, in particular to a kind of foam drainage gas recovery downhole automatic dosing device. BACKGROUND

[0002] Gas well in the production process of middle and later period, water well is easy to form liquid, influence natural gas well operation, usually adopt the way of foam drainage gas recovery to carry out drainage gas recovery;Such as the patent document with application No.CN201310199496.5, it discloses a kind of foam drainage gas recovery downhole automatic dosing device and method, the device realizes automatic dosing, but there is certain deficiency in the process of using: medicament flows along fixed route, the contact range of same time with liquid is limited, and the efficiency of removing liquid needs to be improved, for this purpose, we propose a kind of foam drainage gas recovery downhole automatic dosing device to solve the above problems. SUMMARY

[0003] The present application is to solve the problems raised in the background art, and proposes a kind of foam drainage gas recovery downhole automatic dosing device.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] A kind of foam drainage gas recovery downhole automatic dosing device, including casing, gas pipe, medicine storage tank, the outside of the medicine storage tank is installed with liquid outlet pump, and medicine storage tank is fixedly connected with the suction tube between liquid outlet pump, the liquid outlet pump is fixedly connected with liquid outlet main pipe, and the liquid outlet main pipe is installed with valve, the liquid outlet main pipe is fixedly connected with liquid outlet branch pipe, and the lower end of liquid outlet branch pipe is located in gas pipe, the liquid outlet branch pipe is installed with differential pressure control valve, the lower end of liquid outlet branch pipe is closed and fixedly connected with a one-way liquid inlet pipe;

[0006] The liquid outlet branch pipe is rotatably installed with annular seat on the liquid outlet branch pipe by connecting member, the gas pipe and annular seat are installed with medicine outlet orientation control component, the liquid outlet branch pipe and annular seat are provided with medicine outlet angle control component, for controlling the angle of medicine outlet, the medicine outlet angle control component includes self-adjusting assembly, control angle assembly, and self-adjusting assembly cooperates with control angle assembly, for controlling the operation of control angle assembly;

[0007] The annular seat is installed with a plurality of liquid outlet barrels on the annular seat by a plurality of swing assemblies, and the swing assembly and liquid outlet barrel are one-to-one correspondence, and control angle assembly cooperates with control angle assembly, and annular seat and corresponding liquid outlet barrel are installed with elastic connecting pipe, the liquid outlet barrel is provided with open lower end.

[0008] In the automatic downhole chemical injection device for foam drainage gas production well, the connecting member comprises a connecting pipe, a connecting ring and an annular groove, a plurality of connecting pipes are fixedly connected to the liquid outlet branch pipe, the connecting pipes are fixedly penetrated by the connecting ring, and the annular groove is arranged on the annular seat and matched with the connecting ring.

[0009] The end surface of the annular groove is annular, and an annular groove is arranged on each side of the annular groove, and the annular seat is fixedly provided with a limiting sliding block matched with the annular groove.

[0010] The limiting sliding block is annular and is sealingly and slidingly installed in the corresponding annular groove.

[0011] In the automatic downhole chemical injection device for foam drainage gas production well, the medicine outlet direction control member comprises a gear ring one, an explosion-proof servo motor, a rotating shaft and a driving wheel, the annular seat is fixedly provided with the gear ring one on the upper surface, the outer side of the gas pipe is fixedly provided with the explosion-proof servo motor, the driving end of the explosion-proof servo motor is fixedly provided with the rotating shaft, the rotating shaft is sealingly and rotatably penetrated through the gas pipe and fixedly provided with the driving wheel, and the driving wheel is engaged with the gear ring one.

[0012] The gas pipe is provided with a mounting hole, and a bearing is sealingly arranged between the rotating shaft and the mounting hole.

[0013] In the automatic downhole chemical injection device for foam drainage gas production well, the self-adjusting assembly comprises a transmission groove, a shaft body one, a gear one, a vertical rod and a gear ring two, a plurality of transmission grooves are arranged on the inner wall of the annular seat, the transmission grooves are correspondingly arranged on the liquid outlet cylinder, a shaft body one is rotatably arranged on each transmission groove, the shaft body one is fixedly provided with the gear one, a vertical rod is fixedly arranged on each connecting pipe, a gear ring two is fixedly arranged on the vertical rods, and the gear one is engaged with the gear ring two.

[0014] The outer diameter of the gear ring two is smaller than the inner diameter of the annular seat, and the gear one is partially arranged on the outer side of the annular seat.

[0015] In the automatic downhole chemical injection device for foam drainage gas production well, the control angle assembly comprises a moving cavity, a reciprocating screw rod, a transmission structure and a moving seat, a plurality of moving cavities are arranged on the annular seat and communicated with the corresponding transmission grooves, a reciprocating screw rod is rotatably arranged on each moving cavity, a transmission structure is arranged between the reciprocating screw rod and the corresponding shaft body one, and a moving seat is arranged on each reciprocating screw rod through a nut.

[0016] The transmission structure comprises a one-way bearing and a bevel gear, a one-way bearing is arranged on each shaft body one, a bevel gear is arranged on the one-way bearing and the reciprocating screw rod, and the corresponding two bevel gears are engaged.

[0017] In the above-mentioned foam drainage gas recovery downhole automatic dosing device, the swing assembly comprises a toothed rod, a sliding groove and a swing structure, a plurality of sliding grooves and a plurality of connecting cavities are formed in the annular seat, the sliding grooves are in communication with the corresponding connecting cavities, the connecting cavities are in communication with the corresponding moving cavities, a short rod is fixedly installed at the lower end of each moving seat, the lower end of the short rod penetrates through the corresponding connecting cavity and is fixedly installed with a toothed rod, and the toothed rod is slidably installed in the corresponding sliding groove, and a plurality of swing structures are arranged on the annular seat and matched with the corresponding toothed rods.

[0018] In the above-mentioned foam drainage gas recovery downhole automatic dosing device, the swing structure comprises a swing groove, a shaft body two, a gear two and a connecting piece, a plurality of swing grooves are formed in the annular seat, and the swing grooves are in communication with the corresponding sliding grooves, a shaft body two is rotatably installed in each swing groove, a gear two is fixedly installed on each shaft body two, the gear two is engaged with the corresponding toothed rod, and the connecting piece is installed between the shaft body two and the corresponding liquid outlet cylinder.

[0019] In the above-mentioned foam drainage gas recovery downhole automatic dosing device, the elastic connecting pipe comprises a hard pipe and an expansion pipe, a plurality of hard pipes are fixedly installed on the annular seat, the upper end of the hard pipe is in communication with the annular groove, the lower end of the hard pipe penetrates through the lower side of the annular seat and is fixedly communicated with an expansion pipe, and the lower end of the expansion pipe is fixedly communicated with the corresponding liquid outlet cylinder.

[0020] In the above-mentioned foam drainage gas recovery downhole automatic dosing device, the outer side of the gas pipe is fixedly installed with an isolation cover, and the explosion-proof servo motor is located in the isolation cover.

[0021] In the above-mentioned foam drainage gas recovery downhole automatic dosing device, the connecting piece comprises a swing block and a swing rod, a swing block is fixedly installed on each shaft body two, a swing rod is fixedly installed at the lower end of the swing block, and the lower end of the swing rod is fixedly arranged with the upper end of the corresponding liquid outlet cylinder.

[0022] The maximum straight-line distance between the swing block and the shaft body two is less than the radius of the swing groove.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] 1: By controlling the speed and angle of the drug flow, the drug can quickly and effectively contact the effusion, and the angle of the drug flow has reciprocating swing and different selection within the swing amplitude, which further improves the effective contact of the drug with the effusion and improves the effusion removal efficiency.

[0025] 2: the rotation of the rotating shaft can drive the liquid outlet cylinder to revolve, so that the medicament enters the effusion at a certain speed, and the speed of the medicament entering the effusion can be changed by controlling the rotating speed of the rotating shaft, so that the medicament is better mixed with effusions of different depths.

[0026] 3: the angle of the liquid outlet cylinder during revolution can be selected according to the needs, and the direction of the medicament outflow can be changed by selecting reciprocating swing, so as to expand the contact range with the effusion, and the liquid outlet cylinder can also stop swinging after swinging to a certain angle, so as to control the outflow angle of the medicament. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 A structural schematic diagram of a foam drainage gas recovery downhole automatic dosing device is provided.

[0029] Figure 2 A Figure 1 A structural sectional view of the lower end part of the middle sleeve pipe.

[0030] Figure 3 A Figure 2 A structural schematic diagram from another perspective.

[0031] Figure 4 A Figure 3 An enlarged structural schematic diagram of part A of the middle.

[0032] Figure 5 A Figure 2 A structural schematic diagram of removing the sleeve pipe, gas pipe and rotating a certain angle.

[0033] Figure 6 A Figure 5 An enlarged structural schematic diagram of part B of the middle.

[0034] Figure 7 A Figure 5 A structural schematic diagram of rotating a certain angle and partially cutting the annular seat.

[0035] Figure 8 A Figure 7 An enlarged structural schematic diagram of part C of the middle.

[0036] Figure 9 A Figure 5 A structural schematic diagram of the connection ring part after rotating a certain angle.

[0037] Figure 10 For Figure 8 Structure diagram of the liquid outlet cylinder part after rotating a certain angle in the middle;

[0038] Figure 11 For Figure 7 Structure diagram of the connecting ring from another perspective in the middle;

[0039] Figure 12 For Figure 11 Structure enlarged diagram of the D part in the middle.

[0040] In the figure: 1, sleeve; 2, air pipe; 3, medicine storage tank; 4, liquid outlet pump; 5, liquid outlet main pipe; 6, valve; 7, liquid outlet branch pipe; 8, differential pressure control valve; 9, bearing; 10, connecting pipe; 11, connecting ring; 12, annular seat; 13, gear ring one; 14, explosion-proof servo motor; 15, rotating shaft; 16, driving wheel; 17, transmission groove; 18, shaft body one; 19, gear one; 20, vertical rod; 21, gear ring two; 22, moving cavity; 23, reciprocating screw rod; 24, one-way bearing; 25, helical gear; 26, moving seat; 27, gear rod; 28, sliding groove; 29, swing groove; 30, shaft body two; 31, gear two; 32, swing block; 33, swing rod; 34, liquid outlet cylinder; 35, hard pipe; 36, telescopic pipe; 37, annular groove; 38, connecting cavity; 39, isolation cover DETAILED DESCRIPTION

[0041] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0042] The structure, proportion, size, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the present specification, to be understood and read by those skilled in the art, and do not have technical substantial significance to limit the conditions that can be implemented by the present application. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects that can be produced by the present application and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "slightly" and "one" in the present specification are only for the convenience of clear description, and are not used to limit the scope of implementation of the present application. The change or adjustment of relative relationship, without substantially changing the technical content, is also considered as the implementation scope of the present application.

[0043] Reference Figures 1-12 A kind of foam drainage gas downhole automatic dosing device, including casing 1, gas pipe 2, medicine storage tank 3, liquid outlet pump 4 is installed on the outside of medicine storage tank 3, and medicine storage tank 3 is fixedly connected with the suction tube between liquid outlet pump 4, liquid outlet pump 4 is fixedly connected with liquid outlet main pipe 5, and valve 6 is installed on liquid outlet main pipe 5, liquid outlet main pipe 5 is fixedly connected with liquid outlet branch pipe 7, and the lower end of liquid outlet branch pipe 7 is located in gas pipe 2, and differential pressure control valve 8 is installed on liquid outlet branch pipe 7;The above part is prior art, and automatic dosing can be carried out according to the degree of gas well liquid loading by using differential pressure control valve 8, and dosing is automatically stopped after liquid loading is reduced to a certain degree;The lower end of liquid outlet branch pipe 7 is closed and is fixedly connected with a one-way liquid inlet pipe, and the setting of one-way liquid inlet pipe makes the bottom of liquid outlet branch pipe 7 have liquid loading, specifically, the lower part of differential pressure control valve 8 has liquid loading, to meet the pressure difference detection required by differential pressure control valve 8, and the setting of one-way liquid inlet pipe makes that the medicament will not flow directly into liquid loading through this place.

[0044] Annular seat 12 is rotatably installed on liquid outlet branch pipe 7 by connecting member, and the connecting member includes connecting pipe 10, connecting ring 11 and annular groove 37, a plurality of connecting pipes 10 are fixedly connected with liquid outlet branch pipe 7, connecting ring 11 is fixedly installed through the plurality of connecting pipes 10, and annular groove 37 is formed in annular seat 12 and matched with connecting ring 11;The end surface of annular groove 37 is annular, and an annular groove is formed on both sides of the end surface, and a limiting sliding block matched with the annular groove is fixedly installed on both sides of annular seat 12, and the annular groove and the limiting sliding block are not shown in the figure, which is a common structure for realizing rotation, and the limiting sliding block can be further arranged in an annular shape and sealingly installed in the corresponding annular groove, to further improve the sealing cooperation effect of this part.

[0045] Reference Figures 1-12 Medicine outlet orientation control member is installed between gas pipe 2 and annular seat 12, and the medicine outlet orientation control member includes gear ring one 13, explosion-proof servo motor 14, rotating shaft 15 and driving wheel 16, gear ring one 13 is fixedly installed on the upper surface of annular seat 12, explosion-proof servo motor 14 is fixedly installed on the outside of gas pipe 2, isolation cover 39 can be fixedly installed on the outside of gas pipe 2, and explosion-proof servo motor 14 is located in isolation cover 39, to further protect explosion-proof servo motor 14;Driving end of explosion-proof servo motor 14 is fixedly installed with rotating shaft 15, rotating shaft 15 is sealingly rotatably penetrated through gas pipe 2 and fixedly installed with driving wheel 16, and driving wheel 16 is engaged with gear ring one 13;Further, mounting hole is formed in gas pipe 2, and sealingly matched bearing 9 is installed between rotating shaft 15 and mounting hole, to better support rotating shaft 15.

[0046] The explosion-proof servo motor 14 is selected to meet the explosion-proof standard to prevent electrical sparks, heat sources and other potential gas explosion hazards during operation. Common explosion-proof standards include EX explosion-proof standards, such as EXd (explosion-proof enclosure) or EXe (enhanced explosion-proof), and specific requirements are selected according to the risk level of the gas well environment; At the same time, the material selected for the structure of the driving wheel 16 and other structures during preparation also needs to be explosion-proof, to avoid sparks caused by electrical equipment or mechanical wear, and appropriate sealing elements can be provided, such as a isolation cover (sealing element) between the driving wheel 16 and the gear ring 13, to further improve safety during use. Some of these are existing technologies and will not be described in detail here; At the same time, the above-mentioned parts can also be set in the accumulated liquid, so that the residual accumulated liquid can submerge the parts.

[0047] Referring to Figures 1-12 , the medicine outlet angle control member is provided between the liquid outlet branch pipe 7 and the annular seat 12, which is used to control the angle of the medicine outlet, and the medicine outlet angle control member includes a self-adjusting assembly and a control angle assembly, and the self-adjusting assembly cooperates with the control angle assembly to control the operation of the control angle assembly; The self-adjusting assembly includes a transmission groove 17, a shaft body 18, a gear 19, a vertical rod 20, and a gear ring 21, a plurality of transmission grooves 17 are formed on the inner wall of the annular seat 12, and each transmission groove 17 corresponds to a liquid outlet cylinder 34, one shaft body 18 is rotatably installed on each transmission groove 17, a gear 19 is fixedly installed on the shaft body 18, one vertical rod 20 is fixedly installed on each connecting pipe 10, and a plurality of vertical rods 20 are fixedly installed on a gear ring 21, and the gears 19 are engaged with the gear ring 21; The outer diameter of the gear ring 21 is smaller than the inner diameter of the annular seat 12, and part of the gear 19 is located outside the annular seat 12, so that there is a certain gap between the gear ring 21 and the annular seat 12, which reduces the obstruction to the flow of natural gas caused by the overall setting; Further, the lower surfaces of the annular seat 12 and the gear ring 21 can be arc-shaped.

[0048] The control angle assembly includes a moving cavity 22, a reciprocating screw rod 23, a transmission structure, and a moving seat 26, a plurality of moving cavities 22 are formed on the annular seat 12, and the moving cavities 22 are in communication with the corresponding transmission grooves 17, one reciprocating screw rod 23 is rotatably installed on each moving cavity 22, and the transmission structure is installed between the reciprocating screw rod 23 and the corresponding shaft body 18, the transmission structure includes a one-way bearing 24 and a bevel gear 25, one one-way bearing 24 is installed on each shaft body 18, and one bevel gear 25 is installed on each one-way bearing 24 and reciprocating screw rod 23, and the corresponding two bevel gears 25 are engaged, and one moving seat 26 is installed on each reciprocating screw rod 23 through a nut.

[0049] Referring to Figures 1-12The plurality of liquid outlet barrels 34 are installed on the annular seat 12 through a plurality of swing assemblies, the swing assemblies correspond to the liquid outlet barrels 34 one by one, the liquid outlet barrels 34 are provided with an open lower end, and the liquid outlet barrels 34 are further provided in a spiral shape, so that the medicament flows out of the liquid outlet barrels 34 in a spiral trajectory. When the medicament enters the spiral pipeline, it flows along the curved direction of the pipeline. The shape of the curve changes the flow direction of the medicament by a certain angle, causing the liquid to generate a spiral trajectory during flow. The control angle assembly cooperates with the control angle assembly, the swing assembly includes a tooth rod 27, a sliding groove 28, and a swing structure, the annular seat 12 is provided with a plurality of sliding grooves 28 and a plurality of connecting cavities 38, and the sliding grooves 28 are in communication with the corresponding connecting cavities 38, and the connecting cavities 38 are in communication with the corresponding moving cavities 22. The lower end of each moving seat 26 is fixedly installed with a short rod, the lower end of the short rod penetrates through the corresponding connecting cavity 38 and is fixedly installed with a tooth rod 27, and the tooth rod 27 is slidably installed in the corresponding sliding groove 28. The annular seat 12 is provided with a plurality of swing structures, and the swing structures cooperate with the corresponding tooth rods 27.

[0050] The swing structure includes a swing groove 29, a shaft body two 30, a gear two 31, and a connecting piece. The annular seat 12 is provided with a plurality of swing grooves 29, and the swing grooves 29 are in communication with the corresponding sliding grooves 28. A shaft body two 30 is rotatably installed on each swing groove 29. A gear two 31 is fixedly installed on each shaft body two 30. The gear two 31 is engaged with the corresponding tooth rod 27. A connecting piece is installed between the shaft body two 30 and the corresponding liquid outlet barrel 34. The connecting piece includes a swing block 32 and a swing rod 33. A swing block 32 is fixedly installed on each shaft body two 30. The maximum straight-line distance between the swing block 32 and the shaft center of the shaft body two 30 is less than the radius of the swing groove 29, thereby ensuring the required swing. An elastic seal such as an elastic rubber pad can be provided between the swing groove 29 and the connecting piece to keep the part in a relatively sealed state under the premise of meeting the required use. The lower end of the swing block 32 is fixedly installed with a swing rod 33, and the lower end of the swing rod 33 is fixedly provided with the upper end of the corresponding liquid outlet barrel 34.

[0051] An elastic connecting pipe piece is installed between the annular seat 12 and the corresponding liquid outlet barrel 34. The elastic connecting pipe piece includes a hard pipe 35 and an expansion pipe 36. A plurality of hard pipes 35 are fixedly installed on the annular seat 12, and the upper ends of the hard pipes 35 are in communication with the annular groove 37. The lower ends of the hard pipes 35 penetrate below the annular seat 12 and are fixedly connected with an expansion pipe 36. The lower end of the expansion pipe 36 is fixedly connected with the corresponding liquid outlet barrel 34. The expansion pipe 36 is provided to satisfy the reciprocating swing of the liquid outlet barrel 34 without affecting the normal flow of the medicament.

[0052] Further, the fixed connection described above should be understood in a broad sense unless otherwise specified and limited, for example, it can be welding, or gluing, or integrally formed, etc.

[0053] In the present application, when the pressure difference control valve 8 is opened to add the medicament, the medicament is delivered into the annular seat 12 through the connecting pipe 10, then delivered into the liquid outlet cylinder 34 through the hard pipe 35 and the telescopic pipe 36, and then flows into the accumulated liquid from the liquid outlet cylinder 34;

[0054] The explosion-proof servo motor 14 is turned on, and the explosion-proof servo motor 14 works to drive the gear ring I 13 to rotate through the rotating shaft 15 and the driving wheel 16, the gear ring I 13 drives the annular seat 12 to rotate, the annular seat 12 drives the liquid outlet cylinder 34 to rotate, and thus the medicament enters the accumulated liquid at a certain speed, and the speed of the medicament entering the accumulated liquid can be changed by controlling the rotating speed of the rotating shaft 15, so that the medicament can be better mixed with the accumulated liquid at different depths;

[0055] When the gear ring I 13 rotates, the gear I 19 mounted thereon also rotates, and the gear I 19 rotates through the cooperation of the gear ring II 21, and the shaft body I 18 rotates, which is divided into two states, the first state: the one-way bearing 24 drives the reciprocating screw rod 23 to rotate through the bevel gear 25, and the second state: the one-way bearing 24 does not drive the reciprocating screw rod 23 to rotate, which can be used by swinging first and then selecting different inclination angles, or vice versa, and the specific setting can be made before use according to the needs.

[0056] When the reciprocating screw rod 23 rotates, the gear rod 27 moves through the moving seat 26, the shaft body II 30 reciprocates through the gear II 31 driven by the gear rod 27, and the liquid outlet cylinder 34 reciprocates through the swing block 32 and the swing rod 33 driven by the shaft body II 30, so as to change the direction of the medicament flowing out and expand the contact range with the accumulated liquid, and in use, the liquid outlet cylinder 34 can be selected to reciprocate continuously, or stop swinging after swinging to a certain angle (at this time, the one-way bearing 24 does not drive the reciprocating screw rod 23 to rotate), so that the liquid outlet cylinder 34 rotates with the annular seat 12 at a certain inclination; after the medicament is added, the explosion-proof servo motor 14 is turned off.

[0057] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A foam drainage gas automatic downhole dosing device, comprising a sleeve (1), a gas pipe (2), a medicine storage tank (3), characterized in that, The outer side of the medicine storage tank (3) is provided with a liquid outlet pump (4), and the medicine storage tank (3) is fixedly communicated with the liquid outlet pump (4) through a medicine suction pipe, the liquid outlet pump (4) is fixedly communicated with a liquid outlet main pipe (5), and the liquid outlet main pipe (5) is provided with a valve (6), the liquid outlet main pipe (5) is fixedly communicated with a liquid outlet branch pipe (7), and the lower end of the liquid outlet branch pipe (7) is located in the air pipe (2), the liquid outlet branch pipe (7) is provided with a differential pressure control valve (8), and the lower end of the liquid outlet branch pipe (7) is closed and fixedly communicated with a one-way liquid inlet pipe; The liquid outlet branch pipe (7) is rotatably provided with an annular seat (12) through a connecting member, the air pipe (2) and the annular seat (12) are provided with a medicine outlet direction control member, the liquid outlet branch pipe (7) and the annular seat (12) are provided with a medicine outlet angle control member for controlling the angle of medicine outlet, the medicine outlet angle control member comprises a self-adjusting assembly and a control angle assembly, and the self-adjusting assembly cooperates with the control angle assembly to control the operation of the control angle assembly; A plurality of liquid outlet cylinders (34) are installed on the annular seat (12) through a plurality of swing assemblies, the swing assemblies correspond to the liquid outlet cylinders (34) one by one, the control angle assembly cooperates with the control angle assembly, and the annular seat (12) and the corresponding liquid outlet cylinder (34) are provided with an elastic connecting pipe; The connecting member comprises a connecting pipe (10), a connecting ring (11) and an annular groove (37), the liquid outlet branch pipe (7) is fixedly communicated with a plurality of connecting pipes (10), and the connecting ring (11) is fixedly and penetratively installed on the plurality of connecting pipes (10), and the annular seat (12) is provided with an annular groove (37) matched with the connecting ring (11); The end face of the annular groove (37) is annular, and an annular groove is formed on both sides thereof, and the annular seat (12) is fixedly provided with a limiting sliding block matched with the annular groove on both sides thereof; The limiting sliding block is annular and is sealingly and slidingly installed on the corresponding annular groove; The medicine outlet direction control member comprises a gear ring one (13), an explosion-proof servo motor (14), a rotating shaft (15) and a driving wheel (16), the upper surface of the annular seat (12) is fixedly provided with the gear ring one (13), the outer side of the air pipe (2) is fixedly provided with the explosion-proof servo motor (14), the driving end of the explosion-proof servo motor (14) is fixedly provided with the rotating shaft (15), the rotating shaft (15) is sealingly and rotatably penetrates the air pipe (2) and is fixedly provided with the driving wheel (16), and the driving wheel (16) is engaged with the gear ring one (13); The air pipe (2) is provided with a mounting hole, and the rotating shaft (15) and the mounting hole are provided with a sealing bearing (9). The self-adjusting assembly comprises transmission grooves (17), shaft bodies one (18), gear wheels one (19), vertical rods (20) and a gear ring two (21), a plurality of transmission grooves (17) are formed in the inner wall of the annular seat (12), and the transmission grooves (17) correspond to the liquid outlet cylinders (34) one by one, one shaft body one (18) is rotatably installed on each transmission groove (17), a gear wheel one (19) is fixedly installed on the shaft body one (18), one vertical rod (20) is fixedly installed on each connecting pipe (10), and a plurality of vertical rods (20) are fixedly installed on the gear ring two (21), and the gear wheels one (19) are engaged with the gear ring two (21). The outer diameter of the gear ring two (21) is smaller than the inner diameter of the annular seat (12), and the gear wheels one (19) are partially located outside the annular seat (12). The control angle assembly comprises moving cavities (22), reciprocating lead screws (23), transmission structures and moving seats (26), a plurality of moving cavities (22) are formed in the annular seat (12), and the moving cavities (22) are communicated with the corresponding transmission grooves (17), one reciprocating lead screw (23) is rotatably installed on each moving cavity (22), and the transmission structure is installed between the reciprocating lead screw (23) and the corresponding shaft body one (18), and one moving seat (26) is installed on each reciprocating lead screw (23) through a nut. The transmission structure comprises one-way bearings (24) and bevel gears (25), one one-way bearing (24) is installed on each shaft body one (18), and one bevel gear (25) is installed on each one-way bearing (24) and reciprocating lead screw (23), and the corresponding two bevel gears (25) are engaged. The swinging assembly comprises tooth rods (27), sliding grooves (28) and swinging structures, a plurality of sliding grooves (28) and a plurality of connecting cavities (38) are formed in the annular seat (12), the sliding grooves (28) are communicated with the corresponding connecting cavities (38), the connecting cavities (38) are communicated with the corresponding moving cavities (22), the lower end of each moving seat (26) is fixedly installed with a short rod, the lower end of the short rod penetrates through the corresponding connecting cavity (38) and is fixedly installed with a tooth rod (27), the tooth rod (27) is slidably installed on the corresponding sliding groove (28), and a plurality of swinging structures are arranged on the annular seat (12) and matched with the corresponding tooth rods (27).

2. The automatic downhole dosing device for foam drainage gas well according to claim 1, characterized in that, The swinging structure comprises swinging grooves (29), shaft bodies two (30), gear wheels two (31) and connecting pieces, a plurality of swinging grooves (29) are formed in the annular seat (12), and the swinging grooves (29) are communicated with the corresponding sliding grooves (28), one shaft body two (30) is rotatably installed on each swinging groove (29), one gear wheel two (31) is fixedly installed on each shaft body two (30), the gear wheel two (31) is engaged with the corresponding tooth rod (27), and the connecting piece is installed between the shaft body two (30) and the corresponding liquid outlet cylinder (34).

3. The automatic downhole dosing device for foam drainage gas well according to claim 1, characterized in that, The elastic connecting pipe comprises a hard pipe (35) and a telescopic pipe (36), a plurality of hard pipes (35) are fixedly installed on the annular seat (12), the upper end of the hard pipe (35) is communicated with the annular groove (37), the lower end of the hard pipe (35) penetrates through the lower side of the annular seat (12) and is fixedly communicated with a telescopic pipe (36), and the lower end of the telescopic pipe (36) is fixedly communicated with a corresponding liquid outlet cylinder (34).

4. The automatic downhole dosing device for foam drainage gas well according to claim 1, characterized in that, The outer side of the air pipe (2) is fixedly installed with an isolation cover (39), and the explosion-proof servo motor (14) is located in the isolation cover (39).

5. The automatic downhole dosing device for foam drainage gas wells according to claim 2, characterized in that, The connecting piece comprises a swing block (32) and a swing rod (33), one swing block (32) is fixedly installed on each shaft body two (30), the lower end of the swing block (32) is fixedly installed with a swing rod (33), and the lower end of the swing rod (33) is fixedly arranged with the upper end of a corresponding liquid outlet cylinder (34). The maximum straight line distance between the swing block (32) and the shaft center of the shaft body two (30) is less than the radius of the swing groove (29).

Images