A multi-section siphon type air anchor for oil pumping wells and a method of using the same

Abstract

The present invention discloses a multi-section siphon air anchor for an oil pumping well and a method for using the same, comprising: a first filtering mechanism, the first filtering mechanism comprising a first outer tube, a first inner tube fixedly connected to the top surface of the first outer tube, a first separation tube penetrating the first inner tube, a row frame threadedly connected to the bottom end of the first separation tube, an inner gear ring rotatably connected to the bottom of the row frame, and a linkage impeller sleeved on the outer surface of the inner gear ring. In the present invention, when in use, the third outer tube is connected to the existing suction device, and the entire device is effectively inserted into the designated use position until the extension tube is completely immersed in the liquid. At this time, the existing suction device is started by control, and the suction force generated by the existing suction device is effectively transmitted to the inside of the filter tube through the connecting tube, the second separation tube, the second inner tube and the third outer tube, and the suction force can be effectively transmitted to the inside of the first inner tube through the second outer tube, the second delivery tube, the first delivery tube, the first separation tube and the first inner tube.

Description

Technical Field

[0001] The invention belongs to the technical field of air anchor equipment, and in particular relates to a multi-section siphon type air anchor for an oil pumping well and a use method thereof. Background Art

[0002] An oil well is a hole drilled by drilling methods. Generally, after the oil well reaches the oil layer, the oil layer casing is lowered, and oil well cement is injected into the annular space between the casing and the well wall to protect the well wall and seal the oil, gas and water layers. Then, according to the requirements of oil field development, the oil layer is perforated with a perforating gun to form a channel, and the oil pipe is lowered. Using appropriate flow induction methods, the oil is raised from the bottom of the oil well to the wellhead.

[0003] However, in the prior art, during the oil production process in the oil field, the crude oil is mixed with sand and gas into the oil pipe through the action of the oil pump. The entry of gas can easily reduce the pump efficiency of the oil pump. In severe cases, it can cause gas lock and prevent normal production, and the sand can cause the oil pump to get stuck or the ground flow meter to get stuck. Gas lock or pump sticking will cause repeated operations and increased costs. The structure of the existing filtering equipment is relatively fixed, which makes it inconvenient to replace the functional structure. As a result, when some functional structures are damaged, the entire equipment needs to be replaced, which can easily cause a waste of resources. At the same time, the existing filtering equipment actually separates sand particles through the cyclone effect. This method cannot prevent the residue of smaller sand particles, which leads to poor actual filtering effect of the equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-section siphon air anchor for oil wells and a method of using the same, which can fully filter and remove gas and sand in materials, and can conveniently replace functional structures, thereby effectively reducing actual production costs.

[0005] The technical solution adopted by the present invention is as follows: a multi-section siphon air anchor for an oil pumping well, comprising: a first filtering mechanism, the first filtering mechanism comprising a first outer tube, the inner top surface of the first outer tube being fixedly connected to the first inner tube, the first inner tube being penetrated by a first separation tube, the bottom end of the first separation tube being threadedly connected to a row frame, the bottom of the row frame being rotatably connected to an inner gear ring, the outer surface of the inner gear ring being sleeved with a linked impeller, the inner bottom surface of the row frame being equidistantly rotatably connected to a plurality of elastic limiting rollers, a rotating tube being embedded between the outer surfaces of one side of the plurality of elastic limiting rollers, the inner surface wall of the rotating tube being fixedly connected to a stirring frame, the bottom of the stirring frame being fixedly connected to a threaded rod, the bottom end of the first outer tube being threadedly connected to a limiting frame, a sealing cover being slidably embedded in the limiting frame, the sealing cover being threadedly connected to the threaded rod, and the top end of the first separation tube being threadedly connected to a first guide frame;

[0006] A second filtering mechanism, the second filtering mechanism comprising a second outer tube, the second outer tube being threadedly connected to the top end of the first guide frame, a second delivery tube being inserted at the bottom end of the second outer tube, a sealing frame being threadedly connected to the top end of the second outer tube, and a filtering tube being connected to the top surface of the sealing frame; and

[0007] The separation mechanism comprises a third outer tube, the third outer tube is threadedly connected to the top of the sealing frame, the interior of the third outer tube is fixedly connected to the second inner tube, and the interior of the second inner tube is inserted with a second separation tube.

[0008] Wherein, the bottom end of one of the elastic limiting rollers extends to the outside of the row frame, and the bottom end of one of the elastic limiting rollers is fixedly connected to a linkage gear, and the linkage gear is meshed with the inner gear ring.

[0009] Wherein, a first guide bar is fixedly connected between the first outer tube and the first inner tube, and the interior of the first inner tube is communicated with the interior of the first separation tube.

[0010] Among them, a first conveying pipe is inserted into the top end of the first guide frame, the bottom end of the first conveying pipe extends to the inside of the first inner tube, and the inside of the first conveying pipe is connected with the inside of the second conveying pipe.

[0011] Wherein, a support frame is fixedly connected to the bottom end of the filter tube, and a support ring is inserted into the interior of the second outer tube.

[0012] The inner top surface of the second inner tube is connected with an air guide tube, the top of the second inner tube is connected with an exhaust pipe, and a one-way valve is arranged on the exhaust pipe.

[0013] One end of the exhaust pipe extends to the outside of the third outer pipe, and one end of the exhaust pipe is connected to an extension pipe.

[0014] Wherein, a second guide bar and a spacer bar are fixedly connected between the third outer tube and the second inner tube.

[0015] A connecting tube is passed through the outer surface of one side of the second separation tube, and one end of the connecting tube extends to the top of the second inner tube.

[0016] A method for using a multi-section siphon type air anchor for an oil well comprises the following steps:

[0017] S1. Installation and setting: Connect the existing suction device through the third outer tube, and then insert the whole device into the designated use position until the extension tube is completely immersed in the liquid. At this time, the existing suction device is started by control, so that the suction force generated by the existing suction device is transmitted to the inside of the filter tube through the connecting tube, the second separation tube, the second inner tube and the third outer tube, and then the suction force can be transmitted to the inside of the first inner tube through the second outer tube, the second delivery tube, the first delivery tube, the first separation tube and the first inner tube;

[0018] S2, first separation: under the position restriction of the first outer tube, the first inner tube, the first guide bar, the limit frame and the sealing cover, the external material can be sucked into the space between the first inner tube and the first outer tube, and then a swirl effect is generated through the first inner tube to the inside of the first separation tube, and then under the action of centrifugal force, the sand particles with larger mass will touch the inner wall of the first separation tube and slowly slide down, and at the same time, the liquid containing gas will be gradually transported to the inside of the second outer tube through the first conveying pipe and the second conveying pipe. At the same time, when the external material enters the inside of the first outer tube, the flowing material can drive the inner gear ring to rotate through the linkage impeller, and then the rotating inner gear ring can drive the corresponding elastic limit roller to rotate through the linkage gear, and then the elastic limit roller can drive the rotating tube to rotate, and then the rotating tube can drive the threaded rod to rotate, and then the rotating threaded rod can move the sealing cover out of the limit frame, and then the separated sand particles can be discharged through the limit frame;

[0019] S3, second separation: the liquid injected into the second outer tube is blocked by the abutment frame and the abutment ring, so that the flowing liquid cannot directly impact the filter tube, and the liquid flow rate can be reduced, so that the filter tube can fully filter the smaller volume of sand particles in the liquid, and the filtered fine sand particles can be gradually deposited on the bottom surface of the second outer tube under the blockage of the abutment ring;

[0020] S4. The third separation: the liquid passing through the filter tube can be effectively injected into the second separation tube under the obstruction of the third outer tube, the second inner tube, the second guide bar and the partition bar, thereby generating a vortex inside the second separation tube, thereby separating the gas and the liquid, and allowing the liquid to gradually flow into the connecting tube along the inner wall of the second separation tube, and then be sucked into the existing suction device. The separated gas causes the pressure inside the air guide tube to increase, and then is injected into the exhaust pipe through the air guide pipe, and then is effectively discharged through the exhaust pipe and the extension pipe, thereby enabling the equipment to fully separate the fine sand gas and liquid.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] In the present invention, when in use, the third outer tube is connected to the existing suction device, and the entire device is effectively inserted into the designated use position until the extension tube is completely immersed in the liquid. At this time, the existing suction device is started by control, and the suction generated by the existing suction device is effectively transmitted to the inside of the filter tube through the connecting tube, the second separation tube, the second inner tube and the third outer tube, and the suction can be effectively transmitted to the inside of the first inner tube through the second outer tube, the second conveying tube, the first conveying tube, the first separation tube and the first inner tube, and then under the position restriction of the first outer tube, the first inner tube, the first guide bar, the limit frame and the sealing cover, the external material can be The material is effectively sucked into between the first inner tube and the first outer tube, and then a swirl effect is generated inside the first separation tube through the first inner tube. Then, under the action of centrifugal force, the sand particles with larger mass will touch the inner wall of the first separation tube and then slowly slide down. At the same time, the liquid containing gas will be gradually transported to the inside of the second outer tube through the first conveying pipe and the second conveying pipe. At the same time, when the external material enters the inside of the first outer tube, the flowing material can effectively drive the inner gear ring to rotate through the linked impeller, and then the rotating inner gear ring can effectively drive the corresponding elastic limiting roller to rotate through the linked gear, and then the elastic limiting roller can effectively drive the rotating tube to rotate, so that the rotating tube can The threaded rod is driven to rotate, so that the rotating threaded rod can effectively move the sealing cover out of the limit frame, so that the separated sand particles can be discharged through the limit frame, and at the same time, the liquid injected into the second outer tube is blocked by the abutment frame and the abutment ring, so that the flowing liquid cannot directly impact the filter tube, and at the same time, the liquid flow rate can be effectively reduced, so that the filter tube can fully filter the smaller volume of sand particles in the liquid. At the same time, the filtered fine sand particles can gradually settle on the bottom surface of the second outer tube under the obstruction of the abutment ring, and then the liquid passing through the filter tube can be effectively injected into the second separation tube under the obstruction of the third outer tube, the second inner tube, the second guide strip and the partition strip, so as to filter. A vortex is generated inside the second separation tube, thereby separating the gas and liquid, so that the liquid can gradually flow into the connecting tube along the inner wall of the second separation tube, and then be sucked into the existing suction device. The separated gas causes the pressure inside the air duct to increase, and then is injected into the exhaust pipe through the air duct, and then is effectively discharged through the exhaust pipe and the extension pipe, so that the equipment can fully separate the fine sand gas and liquid, so that the equipment can efficiently realize its functions, and at the same time, the corresponding functional components can be conveniently replaced according to actual usage, thereby effectively avoiding the waste of resources and effectively reducing the actual production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front perspective view of the present invention;

[0024] Figure 2 is a rear perspective view of the present invention;

[0025] Figure 3It is a front cutaway perspective view of the present invention;

[0026] Figure 4 It is a front view, cross-sectional and expanded stereoscopic view of the first filtering mechanism of the present invention;

[0027] Figure 5 For the present invention Figure 4 Enlarged view of part A in the middle;

[0028] Figure 6 It is a front view, cross-sectional and expanded stereoscopic view of the second filtering mechanism of the present invention;

[0029] Figure 7 The separation mechanism of the present invention is viewed from the front and in a sectional and expanded perspective.

[0030] Markings in the figure: 1, first filtering mechanism; 101, first outer tube; 102, first inner tube; 103, first guide strip; 104, row frame; 105, elastic limiting roller; 106, linkage gear; 107, inner gear ring; 108, linkage impeller; 109, rotating tube; 110, stirring frame; 111, threaded rod; 112, limiting frame; 113, sealing cover; 114, first separation tube; 115, first guide frame; 116, first conveying tube ; 2. Second filtering mechanism; 201. Second outer tube; 202. Second delivery tube; 203. Butt ring; 204. Sealing frame; 205. Filter tube; 206. Butt frame; 3. Separation mechanism; 301. Third outer tube; 302. Spacer; 303. Second inner tube; 304. Second separation tube; 305. Connecting tube; 306. Second guide strip; 307. Air guide tube; 308. Exhaust pipe; 309. One-way valve; 310. Extension tube. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] Embodiment 1

[0033] Reference Figure 1-Figure 7A multi-section siphon air anchor for an oil well, comprising: a first filtering mechanism 1, a second filtering mechanism 2 and a separating mechanism 3, wherein the first filtering mechanism 1 comprises a first outer tube 101, the establishment of the first outer tube 101 provides an installation basis for the arrangement of other functional components of the equipment, the inner top surface of the first outer tube 101 is fixedly connected with a first inner tube 102, the establishment of the first inner tube 102 is convenient for the installation of other functional components of the equipment, a first separating tube 114 runs through the inside of the first inner tube 102, the establishment of the first separating tube 114 can generate an effective vortex, thereby effectively separating sand particles and liquid, the bottom end of the first separating tube 114 is threadedly connected with a row frame 104, the establishment of the row frame 104 is convenient for the installation of other functional components, the row frame 104 The bottom is rotatably connected with an inner gear ring 107. The establishment of the inner gear ring 107 cooperates with the linkage gear 106 so that the linkage impeller 108 can effectively drive the corresponding elastic limiting roller 105 to rotate. The outer surface of the inner gear ring 107 is sleeved with a linkage impeller 108. The establishment of the linkage impeller 108 provides the power required for the rotation of the elastic limiting roller 105. The inner bottom surface of the frame 104 is equidistantly rotatably connected with multiple elastic limiting rollers 105. The establishment of the elastic limiting roller 105 can effectively limit the position of the rotating tube 109 and can effectively drive the rotating tube 109 to rotate. A rotating tube 109 is embedded between the outer surfaces of one side of the multiple elastic limiting rollers 105. The establishment of the rotating tube 109 can effectively drive the stirring frame 110 and the threaded rod 111 to rotate. The wall is fixedly connected with a stirring frame 110, and the establishment of the stirring frame 110 can be used for conveying and processing accumulated sand particles. The bottom of the stirring frame 110 is fixedly connected with a threaded rod 111, and the establishment of the threaded rod 111 can effectively move and adjust the use position of the sealing cover 113. The bottom end of the first outer tube 101 is threadedly connected to a limiting frame 112. The establishment of the limiting frame 112 is convenient for installing and setting the sealing cover 113, and can effectively limit the movement of the position of the sealing cover 113. The sealing cover 113 is slidably embedded in the limiting frame 112. The establishment of the sealing cover 113 enables external materials to be effectively injected between the first outer tube 101 and the first inner tube 102 when the equipment is used for the first time. The sealing cover 113 is threadedly connected to the threaded rod 111, and the top of the first separation tube 114 is threaded. The first guide frame 115 is connected, and the establishment of the first guide frame 115 is convenient for installing and setting other functional components of the equipment. The second filtering mechanism 2 includes a second outer tube 201, and the establishment of the second outer tube 201 is convenient for installing and setting other functional components of the equipment, and can effectively transport the liquid after the initial filtration. The second outer tube 201 is threadedly connected to the top of the first guide frame 115, and a second delivery pipe 202 is inserted at the bottom of the second outer tube 201. The establishment of the second delivery pipe 202 cooperates with the first delivery pipe 116 to effectively inject the liquid after the initial filtration into the second outer tube 201. The top of the second outer tube 201 is threadedly connected with a sealing frame 204, and the establishment of the sealing frame 204 is convenient for installing and setting other functional components of the equipment.At the same time, it can effectively block the communication between the second outer tube 201 and the third outer tube 301. The top surface of the sealing frame 204 is connected with a filter tube 205. The establishment of the filter tube 205 can fully filter the fine sand particles. The separation mechanism 3 includes a third outer tube 301. The establishment of the third outer tube 301 is convenient for the installation and setting of other functional components of the equipment. The third outer tube 301 is threadedly connected to the top of the sealing frame 204. The third outer tube 301 is fixedly connected with the second inner tube 303. The establishment of the second inner tube 303 is convenient for the installation and setting of other functional components of the equipment. The second inner tube 303 is inserted with a second separation tube 304. The establishment of the second separation tube 304 enables the equipment to effectively generate a vortex to separate gas and liquid.

[0034] Reference Figure 3-Figure 7: The bottom end of one of the elastic limiting rollers 105 extends to the outside of the row frame 104, and the bottom end of one of the elastic limiting rollers 105 is fixedly connected to a linkage gear 106. The establishment of the linkage gear 106 enables the inner gear ring 107 to effectively drive the corresponding elastic limiting roller 105 to rotate. The linkage gear 106 is meshed with the inner gear ring 107. A first guide bar 103 is fixedly connected between the first outer tube 101 and the first inner tube 102. The establishment of the first guide bar 103 can effectively adjust the flow direction of the material injected into the first separation tube 114, and effectively accelerate the flow speed of the material. The interior of the first inner tube 102 is connected to the interior of the first separation tube 114, the first delivery tube 116 is inserted at the top of the first guide frame 115, the bottom end of the first delivery tube 116 extends to the interior of the first inner tube 102, the interior of the first delivery tube 116 is connected to the interior of the second delivery tube 202, the bottom end of the filter tube 205 is fixedly connected to the anti-frame 206, the establishment of the anti-frame 206 can effectively reduce the impact of the liquid on the filter tube 205, and thus can effectively prevent the sand from blocking the filter tube 205, the second outer tube 201 is inserted with an anti-ring 203, the establishment of the anti-ring 203 can effectively prevent continuous injection The liquid introduced disturbs the precipitated sand particles, thereby improving the actual filtering effect of the equipment. The top surface of the second inner tube 303 is connected to an air guide pipe 307. The establishment of the air guide pipe 307 can effectively carry out the centralized transportation of gas. The top of the second inner tube 303 is connected to an exhaust pipe 308. The establishment of the exhaust pipe 308 can effectively discharge the collected gas through the extension pipe 310, so that the flowing air flow can continuously extract the gas inside the second separation tube 304. A one-way valve 309 is provided on the exhaust pipe 308, which can effectively prevent the backflow of external materials. One end of the exhaust pipe 308 extends to Outside the third outer tube 301, one end of the exhaust pipe 308 is connected to an extension tube 310, and the second guide bar 306 and the partition bar 302 are fixedly connected between the third outer tube 301 and the second inner tube 303. The establishment of the second guide bar 306 and the partition bar 302 can effectively fill the space between the third outer tube 301 and the second inner tube 303. A connecting tube 305 passes through the outer surface of one side of the second separation tube (304). The establishment of the connecting tube 305 can effectively transport the completely separated liquid to the existing suction device, and one end of the connecting tube 305 extends to the top of the second inner tube 303.

[0035] The following is a detailed description of a method for using a multi-section siphon air anchor for an oil well provided in an embodiment of the present invention, and the method for using the multi-section siphon air anchor comprises the following steps:

[0036] Step 1, installation and setting: connect the third outer tube 301 to the existing suction device, and then effectively insert the entire device into the designated use position until the extension tube 310 is completely immersed in the liquid. At this time, the existing suction device is started by control, so that the suction force generated by the existing suction device is effectively transmitted to the inside of the filter tube 205 through the connecting tube 305, the second separation tube 304, the second inner tube 303 and the third outer tube 301, and then the suction force can be effectively transmitted to the inside of the first inner tube 102 through the second outer tube 201, the second delivery tube 202, the first delivery tube 116, the first separation tube 114 and the first inner tube 102;

[0037] Step 2, first separation: Under the position restriction of the first outer tube 101, the first inner tube 102, the first guide bar 103, the limit frame 112 and the sealing cover 113, the external materials can be effectively sucked into the space between the first inner tube 102 and the first outer tube 101, and then a swirl effect is generated inside the first separation tube 114 through the first inner tube 102, and then under the action of centrifugal force, the sand particles with larger mass will touch the inner wall of the first separation tube 114 and slowly slide down, and at the same time, the liquid containing gas will be gradually transported to the inside of the second outer tube 201 through the first delivery tube 116 and the second delivery tube 202. At the same time, when the external materials enter the first outer tube 101, the flowing materials can effectively drive the inner gear ring 107 to rotate through the linkage impeller 108, so that the rotating inner gear ring 107 can effectively drive the corresponding elastic limiting roller 105 to rotate through the linkage gear 106, so that the elastic limiting roller 105 can effectively drive the rotating tube 109 to rotate, and the rotating tube 109 can drive the threaded rod 111 to rotate, so that the rotating threaded rod 111 can effectively move the sealing cover 113 out of the limiting frame 112, so that the separated sand particles can be discharged through the limiting frame 112;

[0038] Step 3, second separation: the liquid injected into the second outer tube 201 is blocked by the abutment frame 206 and the abutment ring 203, so that the flowing liquid cannot directly impact the filter tube 205, and the liquid flow rate can be effectively reduced, so that the filter tube 205 can fully filter the smaller volume of sand particles in the liquid, and the filtered fine sand particles can be gradually deposited on the bottom surface of the second outer tube 201 under the blockage of the abutment ring 203;

[0039] Step 4, third separation: the liquid passing through the filter tube 205 can be effectively injected into the second separation tube 304 under the obstruction of the third outer tube 301, the second inner tube 303, the second guide strip 306 and the partition strip 302, thereby generating a vortex in the second separation tube 304, thereby separating the gas and the liquid, so that the liquid can gradually flow into the connecting tube 305 along the inner wall of the second separation tube 304, and then be sucked into the existing suction device. The separated gas causes the internal pressure of the air guide tube 307 to increase, and then is injected into the exhaust pipe 308 through the air guide tube 307, and then is effectively discharged through the exhaust pipe 308 and the extension tube 310, so that the equipment can fully separate the fine sand gas and liquid, so that the equipment can efficiently realize its functions, and at the same time, it can conveniently replace the corresponding functional components according to actual usage, thereby effectively avoiding the waste of resources, and effectively reducing the actual production cost.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-section siphon air anchor for an oil well, characterized in that: include: A first filtering mechanism (1), the first filtering mechanism (1) comprising a first outer tube (101), the top surface of the interior of the first outer tube (101) being fixedly connected to a first inner tube (102), a first separation tube (114) running through the interior of the first inner tube (102), a row frame (104) being threadedly connected to the bottom end of the first separation tube (114), the bottom of the row frame (104) being rotatably connected to an inner gear ring (107), the outer surface of the inner gear ring (107) being sleeved with a linked impeller (108), and a plurality of elastic limiters being rotatably connected to the bottom surface of the row frame (104) at equal intervals Roller (105), a rotating tube (109) is embedded between the outer surfaces of one side of the plurality of elastic limiting rollers (105), the inner surface wall of the rotating tube (109) is fixedly connected with a stirring frame (110), the bottom of the stirring frame (110) is fixedly connected with a threaded rod (111), the bottom end of the first outer tube (101) is threadedly connected with a limiting frame (112), a sealing cover (113) is slidably embedded inside the limiting frame (112), the sealing cover (113) and the threaded rod (111) are threadedly connected, and the top end of the first separation tube (114) is threadedly connected with a first guide frame (115); A second filtering mechanism (2), the second filtering mechanism (2) comprising a second outer tube (201), the second outer tube (201) being threadedly connected to the top end of the first guide frame (115), a second delivery tube (202) being inserted into the bottom end of the second outer tube (201), a sealing frame (204) being threadedly connected to the top end of the second outer tube (201), a filtering tube (205) being arranged on the top surface of the sealing frame (204); and A separation mechanism (3), the separation mechanism (3) comprising a third outer tube (301), the third outer tube (301) being threadedly connected to the top of the sealing frame (204), the interior of the third outer tube (301) being fixedly connected to a second inner tube (303), and the interior of the second inner tube (303) being inserted with a second separation tube (304).

2. A multi-section siphon type air anchor for an oil well as claimed in claim 1, characterized in that: The bottom end of one of the elastic limiting rollers (105) extends to the outside of the row frame (104), and the bottom end of one of the elastic limiting rollers (105) is fixedly connected to a linkage gear (106), and the linkage gear (106) is meshed with an inner gear ring (107).

3. A multi-section siphon type air anchor for an oil well as claimed in claim 2, characterized in that: A first guide strip (103) is fixedly connected between the first outer tube (101) and the first inner tube (102), and the interior of the first inner tube (102) is communicated with the interior of the first separation tube (114).

4. A multi-section siphon type air anchor for an oil well as claimed in claim 3, characterized in that: A first conveying pipe (116) is inserted at the top end of the first guide frame (115), and the bottom end of the first conveying pipe (116) extends into the interior of the first inner pipe (102). The interior of the first conveying pipe (116) is connected to the interior of the second conveying pipe (202).

5. A multi-section siphon type air anchor for an oil well as claimed in claim 4, characterized in that: The bottom end of the filter tube (205) is fixedly connected to a support frame (206), and a support ring (203) is inserted into the interior of the second outer tube (201).

6. A multi-section siphon type air anchor for an oil well as claimed in claim 5, characterized in that: The inner top surface of the second inner tube (303) is connected to an air guide tube (307), and the top of the second inner tube (303) is connected to an exhaust pipe (308), and a one-way valve (309) is provided on the exhaust pipe (308).

7. A multi-section siphon type air anchor for an oil well as claimed in claim 6, characterized in that: One end of the exhaust pipe (308) extends to the outside of the third outer pipe (301), and one end of the exhaust pipe (308) is connected to an extension pipe (310).

8. A multi-section siphon type air anchor for an oil well as claimed in claim 7, characterized in that: A second guide bar (306) and a spacer bar (302) are fixedly connected between the third outer tube (301) and the second inner tube (303).

9. A multi-section siphon type air anchor for an oil well as claimed in claim 8, characterized in that: A connecting tube (305) penetrates the outer surface of one side of the second separation tube (304), and one end of the connecting tube (305) extends to the top of the second inner tube (303).

10. A method for using a multi-section siphon air anchor for an oil well, characterized in that: The method is applied to a multi-section siphon type air anchor for an oil well as claimed in any one of claims 1 to 9, comprising the following steps: S1. Installation and setting: The third outer tube (301) is connected to the existing suction device, and the whole device is inserted into the designated use position until the extension tube (310) is completely immersed in the liquid. At this time, the existing suction device is started by control, so that the suction force generated by the existing suction device is transmitted to the inside of the filter tube (205) through the connecting tube (305), the second separation tube (304), the second inner tube (303) and the third outer tube (301), and the suction force is transmitted to the inside of the first inner tube (102) through the second outer tube (201), the second delivery tube (202), the first delivery tube (116), the first separation tube (114) and the first inner tube (102); S2, first separation: under the position restriction of the first outer tube (101), the first inner tube (102), the first guide bar (103), the limit frame (112) and the sealing cover (113), external materials can be sucked into between the first inner tube (102) and the first outer tube (101), and then a swirling effect is generated inside the first separation tube (114) through the first inner tube (102), and then under the action of centrifugal force, the sand particles with larger mass will touch the inner wall of the first separation tube (114) and slowly slide down, and at the same time, the liquid containing gas will be gradually transported to the second outer tube (201) through the first delivery tube (116) and the second delivery tube (202). At the same time, when external materials enter the first outer tube (101), the flowing materials can drive the inner gear ring (107) to rotate through the linkage impeller (108), thereby causing the rotating inner gear ring (107) to drive the corresponding elastic limiting roller (105) to rotate through the linkage gear (106), thereby causing the elastic limiting roller (105) to drive the rotating tube (109) to rotate, thereby causing the rotating tube (109) to drive the threaded rod (111) to rotate, thereby causing the rotating threaded rod (111) to move the sealing cover (113) out of the limiting frame (112), thereby causing the separated sand particles to be discharged through the limiting frame (112); S3, second separation: the liquid injected into the second outer tube (201) is blocked by the abutment frame (206) and the abutment ring (203), so that the flowing liquid cannot directly impact the filter tube (205), and the liquid flow rate can be reduced, so that the filter tube (205) can fully filter the smaller volume of sand particles in the liquid, and the filtered fine sand particles can be gradually deposited on the bottom surface of the second outer tube (201) under the blockage of the abutment ring (203); S4, third separation: the liquid passing through the filter tube (205) can be effectively injected into the second separation tube (304) under the obstruction of the third outer tube (301), the second inner tube (303), the second guide strip (306) and the spacer strip (302), thereby generating a vortex inside the second separation tube (304), thereby separating the gas and the liquid, thereby allowing the liquid to gradually flow into the connecting tube (305) along the inner wall of the second separation tube (304), and then be sucked into the existing suction device. The separated gas causes the internal pressure of the air guide tube (307) to increase, and then is injected into the exhaust pipe (308) through the air guide tube (307), and then is effectively discharged through the exhaust pipe (308) and the extension tube (310), thereby enabling the device to fully separate the fine sand gas and liquid.

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