Downhole flow adjusting device

Abstract

The invention relates to an underground flow adjusting device which comprises a pipeline assembly, a movable pipe section and a hydraulic control assembly. The pipeline assembly is used for being connected with an underground pipeline, the movable pipe section is arranged in the pipeline assembly, and the movable pipe section is movably connected with the pipeline assembly. The outer wall of the movable pipe section is in sealed connection with the inner wall of the fixed pipe section so as to block the through groove. The hydraulic control assembly comprises a hydraulic control pipeline and a hydraulic control part, the hydraulic control part is in transmission connection with the pipeline assembly and the movable pipe section, the hydraulic control pipeline extends towards the ground for wiring, the hydraulic control pipeline is used for controlling the movable pipe section to move in the pipeline assembly, and the end of the transmission movable pipeline moves at the through groove so as to adjust the plugging area of the through groove. Compared with the prior art, the device has the advantages that the flow of fluid flowing through the device can be adjusted by adjusting and controlling the position of the movable pipe section, the whole adjusting structure is simple, underground installation operation can be conveniently completed, and meanwhile the hydraulic control adjusting mode further has high adjusting stability.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum production, and in particular to a downhole flow regulating device. Background Art

[0002] During the development of oil and gas fields, it is often necessary to inject gas or water into the reservoir to increase the oil and gas recovery rate. In the context of the presence of formation gas sources in the oil field, injecting gas to drive oil in the same well can greatly increase the recovery rate of the oil layer, and at the same time save the cost of ground gas injection equipment. Therefore, the same well with a gas source layer adopts the self-flowing gas injection process technology, that is, the high-pressure gas from the gas-producing layer in the same well flows into the oil layer through the pipe string process, achieving the purpose of gas injection to drive oil.

[0003] Not only for the purpose of gas injection to drive oil, but also in other downhole components, there is a common problem of difficulty in adjusting the flow rate. First, the downhole pressure is relatively high, and simple valve-type adjustment has poor overall stability and often requires inspection and maintenance. Second, in order to facilitate installation and improve installation efficiency, the overall structure of the downhole components needs to meet installation requirements and everything is kept simple, resulting in the lack of a regulating device that can easily adjust the downhole flow rate. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a downhole flow regulating device, which has the advantages of simple regulating method and high stability of regulating effect.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A downhole flow regulating device, comprising:

[0007] A pipeline assembly, the pipeline assembly is used to connect the underground pipeline, a fixed pipe section is arranged inside the pipeline assembly, one end of the fixed pipe section is a plugged end, and the other end is an open end, a through groove is opened on the side of the fixed pipe section, and the fluid flows in from one end of the pipeline assembly, flows through the fixed pipe section and the through groove in sequence, and then flows out from the other end of the pipeline assembly;

[0008] a movable pipe segment, the movable pipe segment being arranged inside the pipeline assembly and movably connected to the pipeline assembly; an outer wall of the movable pipe segment being sealedly connected to an inner wall of the fixed pipe segment to block the through groove; and

[0009] A hydraulic control assembly, the hydraulic control assembly includes a hydraulic control pipeline and a hydraulic control component, the hydraulic control component is connected to the pipeline assembly and the movable pipe section, the hydraulic control pipeline is extended to the wellbore, the hydraulic control pipeline is used to control the movable pipe section to move in the pipeline assembly, and drives the end of the movable pipeline to move at the through groove to adjust the blocking area of ​​the through groove.

[0010] In one embodiment, the pipeline assembly includes:

[0011] A first pipe segment, one end of which is used to connect to a downhole pipeline, and the other end of which is connected to the fixed pipe segment, and the fixed pipe segment is connected to the first pipe segment; and

[0012] The second pipe section is sleeved on the outside of the first pipe section, and a cavity for fluid to pass through is provided between the second pipe section and the fixed pipe section, and the cavity is connected with the fixed pipe section through the through groove.

[0013] In one embodiment, the hydraulic control component includes:

[0014] an annular groove, the annular groove is formed on the inner wall of the first pipe section, the outer edge of the movable pipe section seals the groove edge of the annular groove, the movable pipe section and the annular groove form a hydraulic control cavity for hydraulic control liquid to enter; the hydraulic control pipeline includes a first pipeline and a second pipeline, the two ends of the hydraulic control cavity along the axial direction are respectively provided with a first connecting port and a second connecting port, the first connecting port is connected to the first pipeline, and the second connecting port is connected to the second pipeline; and

[0015] A first seal, wherein the first seal sleeve is disposed on the outer edge of the movable pipe section, the first seal is located inside the annular groove, and the first seal is used to seal and isolate the first connecting port from the second connecting port;

[0016] When the first seal moves to one side of the hydraulic control chamber, the movable pipe section closes the through groove;

[0017] When the first seal moves to the other side of the hydraulic control cavity, the movable pipe section is separated from the through groove.

[0018] In one embodiment, limit rings are provided on both sides of the first seal.

[0019] In one embodiment, a limit block is provided on the inner wall of the fixed pipe section, and a guide groove structure is further provided on the movable pipe section, and the guide groove structure is provided corresponding to the limit block;

[0020] The guide groove structure includes a guide section and at least three positioning sections, and the number and length of the positioning sections are arranged in a gradient manner corresponding to the total length of the through groove; the positioning sections are arranged at even intervals along the circumference of the movable pipe section, and one end of the positioning section is a positioning port and the other end is a closed end, the positioning ports are flush with each other, and the positioning port is connected to the guide section;

[0021] When the movement of the movable pipe segment drives the limit block to enter the guide segment from one of the positioning ports, the movable pipe segment closes the through slot, and the guide segment guides the movable pipe segment to rotate; when the movable pipe segment moves in the opposite direction, the limit block continues to rotate under the guidance of the guide segment until it enters the adjacent positioning port, and when the limit block moves to the closed end corresponding to the positioning segment, the open length of the through slot corresponds to the length of the positioning segment.

[0022] In one embodiment, the guide section includes a transition end, a first inclined edge, and a second inclined edge;

[0023] The number of the transition ends is set corresponding to the positioning segments, and the transition ends and the positioning segments are staggered;

[0024] The ports adjacent to the transition ends are connected by the first inclined edge, and the adjacent positioning ports are connected by the second inclined edge; the inclination directions of the first inclined edge and the second inclined edge are arranged opposite to each other, and the first inclined edge is arranged opposite to the positioning port, and the second inclined edge is arranged opposite to the transition end, and there is an avoidance spacing between the first inclined edge and the second inclined edge for the positioning block to move.

[0025] In one of the embodiments, one of the transition ends extends in a direction away from the positioning segment to form a zero position segment, and the zero position segment is located between the positioning segments corresponding to the highest gear position and the lowest gear position.

[0026] In one embodiment, the positioning port is located at a middle position corresponding to the first inclined edge, and the transition end is located at a middle position corresponding to the second inclined edge.

[0027] In one embodiment, the limit block is circular or elliptical.

[0028] In one embodiment, the number of positioning segments is 7.

[0029] In one embodiment, a flow monitoring component is further provided in the pipeline component to monitor the liquid flow in the pipeline component.

[0030] In one embodiment, the flow monitoring component includes:

[0031] An outer cylinder, wherein the outer cylinder is fixedly connected to the second pipe section, and a confluence area for liquid flow is formed between the outer edge of the outer cylinder and the inner wall of the second pipe section;

[0032] An inner cylinder, wherein the inner cylinder is coaxially sealed and arranged inside the outer cylinder;

[0033] A heating belt, the heating belt is sleeved on the outer edge of the inner cylinder, and the heating belt is used to heat the outer cylinder; and

[0034] A temperature sensor is provided in plurality and is arranged at intervals on the heating belt. The temperature sensor is used to monitor the temperature of the outer cylinder.

[0035] The present invention adopts the above technical solution, which has the following advantages:

[0036] After completing the installation of the device and all underground pipelines, and before starting the operation, the movable pipe section is driven to move through the hydraulic control pipeline, so that the end of the movable pipe section enters the through groove position, and the through groove is adjusted from the state of being completely closed by the movable pipe section to the state of being appropriately opened. The specific blocking area can be adjusted according to the needs of the site. At this time, the through groove is in a connected state. During the operation, the fluid in the underground pipeline flows through the fixed pipe section and the through groove in the pipeline assembly in sequence, and then flows out from the other end of the pipeline assembly. When it is necessary to adjust the fluid flow of the underground pipeline, the movable pipe section can be driven to move again through the hydraulic control pipeline, and the end of the movable pipe section moves to adjust the blocking area of ​​the through groove. Compared with the prior art, the present device can adjust the fluid flow through the device by adjusting the position of the movable pipe section. The overall adjustment structure is simple, which can facilitate the completion of the underground installation operation. At the same time, the hydraulic control adjustment method also has a high adjustment stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the specific structure of a downhole flow regulating device in one embodiment of the present invention;

[0038] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0039] Figure 3 for Figure 2 A partial enlarged view of point B in the middle;

[0040] Figure 4 This is a schematic diagram of the specific structure of a fixed pipe section in one embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the internal structure of a fixed pipe section in one embodiment of the present invention;

[0042] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0043] Figure 7 This is a schematic diagram of the specific structure of the movable pipe section in one embodiment of the present invention;

[0044] Figure 8A schematic diagram of the specific structure of a sealing plate in one embodiment of the present invention;

[0045] Fig. 9 A schematic diagram of the specific structure of a flow monitoring component in one embodiment of the present invention;

[0046] Fig.10 Schematic diagram of the specific structure of the heating belt in one embodiment of the present invention.

[0047] Reference numerals:

[0048] 1. Pipe assembly; 11. Fixed pipe section; 111. Blocking end; 112. Open end; 12. First pipe section; 13. Second pipe section; 14. Limit block;

[0049] 2. Active pipe section;

[0050] 3. Hydraulic control assembly; 31. Annular groove; 32. First seal; 33. First pipeline; 34. Second pipeline; 35. First connection port; 36. Second connection port; 37. Limiting ring;

[0051] 4. Through slot;

[0052] 5. Guide groove structure; 51. Guide section; 511. Transition end; 512. First inclined edge; 513. Second inclined edge; 52. Positioning section; 521. Positioning port; 522. Closed end;

[0053] 6. Sealing plate; 61. Through hole;

[0054] 7. Flow monitoring assembly; 71. Outer tube; 72. Inner tube; 73. Heating belt; 74. Temperature sensor; 75. Confluence area; 76. Insulation layer; 77. Cable connector; 8. Connecting pipe fittings; 81. Tank body. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0056] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0057] During the development of oil and gas fields, it is often necessary to inject gas or water into the reservoir to increase the oil and gas recovery rate. In the context of the presence of formation gas sources in the oil field, injecting gas to drive oil in the same well can greatly increase the recovery rate of the oil layer, and at the same time save the cost of ground gas injection equipment. Therefore, the same well with a gas source layer adopts the self-flowing gas injection process technology, that is, the high-pressure gas from the gas-producing layer in the same well flows into the oil layer through the pipe string process, achieving the purpose of gas injection to drive oil.

[0058] Not only for the purpose of gas injection and oil recovery, but also in other downhole components, there is a common problem of difficulty in adjusting the flow rate. First, the downhole pressure is relatively high, and the simple valve-type adjustment has poor overall stability and often requires inspection and maintenance. Second, in order to facilitate installation and improve installation efficiency, the overall structure of the downhole components needs to meet the installation requirements, and everything is kept simple, resulting in the lack of a regulating device that can easily adjust the downhole flow rate. In view of the above technical problems, the present invention provides a downhole flow regulating device, which has the advantages of simple adjustment method and high stability of adjustment effect. The technical solution of the present invention is described in detail below in conjunction with specific examples.

[0059] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, a downhole flow regulating device according to the present invention comprises a pipeline component 1, a movable pipe section 2 and a hydraulic control component 3.

[0060] The pipeline assembly 1 is used to connect the underground pipeline. A fixed pipe section 11 is arranged inside the pipeline assembly 1. One end of the fixed pipe section 11 is a blocked end 111, and the other end is an open end 112. A through groove 4 is opened on the side of the fixed pipe section 11. The fluid flows in from one end of the pipeline assembly 1, flows through the fixed pipe section 11 and the through groove 4 in sequence, and then flows out from the other end of the pipeline assembly 1.

[0061] The movable pipe section 2 is arranged inside the pipeline assembly 1, and the movable pipe section 2 is movably connected to the pipeline assembly 1. The outer wall of the movable pipe section 2 is sealedly connected to the inner wall of the fixed pipe section 11 to block the through groove 4.

[0062] The hydraulic control assembly 3 includes a hydraulic control pipeline and a hydraulic control component. The hydraulic control component drives and connects the pipeline assembly 1 and the movable pipe section 2. The hydraulic control pipeline is extended to the wellbore for wiring. The hydraulic control pipeline is used to control the movable pipe section 2 to move in the pipeline assembly 1, and drives the end of the movable pipeline to move in the through groove 4 to adjust the blocking area of ​​the through groove 4.

[0063] It should be noted that the device as a whole is used to connect downhole pipelines. During the installation of downhole pipelines, the pipeline component 1 needs to be connected to the downhole pipeline according to the operation plan. During subsequent normal operations, the fluid in the downhole pipeline will flow through the fixed pipe section 11 and the through groove 4 in the pipeline component 1 in sequence and then flow out from the other end of the pipeline component 1. Therefore, by controlling and adjusting the sealing area of ​​the through groove 4, the flow rate of the fluid passing through the device can be regulated, and finally the fluid flow rate in the downhole pipeline can be controlled and regulated.

[0064] For example, after the installation of the device and all underground pipelines is completed, and before the operation begins, the movable pipe section 2 is driven to move through the hydraulic control pipeline, so that the end of the movable pipe section 2 enters the position of the through groove 4, and the through groove 4 is adjusted from the state of being completely closed by the movable pipe section 2 to the state of being properly opened. The specific blocking area can be adjusted according to the needs of the site, and the through groove 4 is in a connected state. During the operation, the fluid in the underground pipeline flows through the fixed pipe section 11 and the through groove 4 in the pipeline assembly 1 in sequence, and then flows out from the other end of the pipeline assembly 1. When it is necessary to adjust the fluid flow of the underground pipeline, the movable pipe section 2 can be driven to move again through the hydraulic control pipeline, and the end of the movable pipe section 2 moves to adjust the blocking area of ​​the through groove 4. Compared with the prior art, the present device can adjust the fluid flow through the device by adjusting the position of the movable pipe section 2. The overall adjustment structure is simple, which can facilitate the completion of the underground installation operation. At the same time, the hydraulic control adjustment method also has a high adjustment stability.

[0065] Reference Figure 3 , Figure 4 as well as Figure 5 As shown, in one embodiment, the overall structure of the pipeline assembly 1 is further refined, and the pipeline assembly 1 includes a first pipe section 12 and a second pipe section 13, wherein one end of the first pipe section 12 is used to connect to the downhole pipeline, and the other end is connected to the fixed pipe section 11. The second pipe section 13 is sleeved on the outside of the first pipe section 12, and there is a cavity for fluid to pass between the second pipe section 13 and the fixed pipe section 11, and the cavity is connected to the fixed pipe section 11 through the through groove 4, and the second pipe section 13 is used to connect to the downhole pipeline.

[0066] It should be noted that, in this embodiment, the first pipe section 12 and the second pipe section 13 are sealed and connected to each other. The first pipe section 12 and the second pipe section 13 form a shell component of the device and are used to connect the downhole pipeline. After the fluid flows into the first pipe section 12 from the downhole pipeline, it flows through the fixed pipe section 11 and the through groove 4 in sequence, flows into the cavity, the second pipe section 13, and finally flows into the downhole pipeline of the subsequent part through the second pipe section 13.

[0067] Reference Figure 4 , Figure 5 as well as Figure 6 As shown, in this embodiment, the overall structure of the hydraulic control component is further refined, and the hydraulic control component includes an annular groove 31 and a first seal 32.

[0068] The annular groove 31 is formed on the inner wall of the first pipe section 12, the outer edge of the movable pipe section 2 seals the groove edge of the annular groove 31, and the movable pipe section 2 and the annular groove 31 form a hydraulic control cavity for the hydraulic control liquid to enter. The hydraulic control pipeline includes a first pipeline 33 and a second pipeline 34, and the two ends of the hydraulic control cavity along the axial direction are respectively provided with a first connecting port 35 and a second connecting port 36, the first connecting port 35 is connected to the first pipeline 33, and the second connecting port 36 is connected to the second pipeline 34.

[0069] The first seal 32 is sleeved on the outer edge of the movable pipe section 2, and the first seal 32 is located inside the annular groove 31. The first seal 32 is used to seal and isolate the first connection port 35 and the second connection port 36. When the first seal 32 moves to one side of the hydraulic control chamber, the movable pipe section 2 closes the through groove 4. When the first seal 32 moves to the other side of the hydraulic control chamber, the movable pipe section 2 is separated from the through groove 4.

[0070] For example, when the sealing area of ​​the through groove 4 needs to be adjusted, the on-site operator adjusts the second pipeline 34 to a normally open state and injects high-pressure hydraulic control fluid into the first pipeline 33. The hydraulic control fluid enters one side of the hydraulic control cavity through the first connecting port 35. At this time, the first seal 32 is located on the side of the hydraulic control cavity close to the first connecting port 35, and the movable pipe section 2 completely blocks the through groove 4. Since the first seal 32 is used to seal the hydraulic control chamber and isolate the first connection port 35 from the second connection port 36, when the hydraulic control fluid enters the hydraulic control chamber from the first connection port 35, the high-pressure hydraulic control fluid will push the first seal 32 to move in the direction of the second connection port 36. Since the second pipeline 34 connected to the second connection port 36 is in a normally open state, the second pipeline 34 plays a role of pressure balance at this time. The hydraulic control fluid injected by the first pipeline 33 will drive the movable pipe section 2 to move to gradually open the through groove 4. When the flow rate is adjusted to the required flow rate, the injection of the hydraulic control fluid is stopped, and the first pipeline 33 and the second pipeline 34 are synchronously adjusted to the normally closed state. At this time, the pressure in the hydraulic control chamber is balanced, and the movable pipe section 2 is positioned in the hydraulic control chamber.

[0071] When the fluid flow rate of the through groove 4 needs to be reduced, the first pipeline 33 is adjusted to the normally open state, and high-pressure hydraulic control fluid is injected into the second pipeline 34. The hydraulic control fluid enters one side of the hydraulic control cavity through the first connecting port 35. The high-pressure hydraulic control fluid will push the first seal 32 to move in the direction of the first connecting port 35. Since the first pipeline 33 connected to the first connecting port 35 is in the normally open state, the first pipeline 33 plays a role of pressure balance at this time. The hydraulic control fluid injected by the second pipeline 34 will drive the movable pipe section 2 to move, so as to gradually reduce the fluid passing area of ​​the through groove 4. When the flow rate is adjusted to the required size, the injection of hydraulic control fluid is stopped, and the first pipeline 33 and the second pipeline 34 are synchronously adjusted to the normally closed state. At this time, the pressure in the hydraulic control cavity is balanced, and the movable pipe section 2 is positioned in the hydraulic control cavity.

[0072] In this embodiment, in order to improve the overall structural strength of the first seal 32 , limit rings 37 are provided on both sides of the first seal 32 , and the limit rings 37 play a role in assisting in positioning and fixing the first seal 32 .

[0073] Reference Figure 3 , Figure 6 as well as Figure 7 As shown, in one embodiment, it is more preferred that a limit block 14 is provided on the inner wall of the fixed pipe section 11 , and the movable pipe section 2 is further provided with a guide groove structure 5 , and the guide groove structure 5 is provided corresponding to the limit block 14 .

[0074] The guide groove structure 5 includes a guide section 51 and at least three positioning sections 52. The number and length of the positioning sections 52 are arranged in a gradient manner corresponding to the total length of the through groove 4. The positioning sections 52 are arranged at even intervals along the circumference of the movable pipe section 2, and one end of the positioning section 52 is a positioning port 521, and the other end is a closed end 522. The positioning ports 521 are flush with each other, and the positioning port 521 is connected to the guide section 51.

[0075] When the movement of the movable pipe segment 2 drives the limit block 14 to enter the guide segment 51 from one of the positioning ports 521, the movable pipe segment 2 closes the through slot 4, and the guide segment 51 guides the movable pipe segment 2 to rotate; when the movable pipe segment 2 moves in the opposite direction, the limit block 14 continues to rotate under the guidance of the guide segment 51 until it enters the adjacent positioning port 521, and when the limit block 14 moves to the closed end 522 of the corresponding positioning segment 52, the open length of the through slot 4 corresponds to the length of the positioning segment 52.

[0076] It should be noted that, in this embodiment, there are 7 positioning segments 52 as a whole, and the lengths of the positioning segments 52 are arranged in a gradient increasing manner, wherein the length value of the longest positioning segment 52 corresponds to the overall length of the through groove 4, and when the movable pipe segment 2 moves to the limit block 14 and contacts the closed end 522 of the positioning segment 52, the open length of the through groove 4 corresponds to the length of the positioning segment 52, so in this embodiment, the 7 positioning segments 52 form 7 flow adjustment gears.

[0077] For example, when the fluid flow of the downhole pipeline is adjusted by the device, the control of the hydraulic control pipeline drives the movable pipe section 2 to move in the fixed pipe section 11, and during the movement, the limit block 14 guides and limits the guide groove structure 5 on the movable pipe section 2. Because the positioning section 52 is arranged at circumferential intervals as a whole, when the movement of the movable pipe section 2 drives the limit block 14 to enter the guide section 51 from one of the positioning ports 521, the movable pipe section 2 closes the through groove 4, and the guide section 51 guides the movable pipe section 2 to rotate. When the movable pipe section 2 moves in the opposite direction, the limit block 14 continues to rotate under the guidance of the guide section 51 until it enters the adjacent positioning port 521. When the limit block 14 moves to the closed end 522 corresponding to the positioning section 52, the open length of the through groove 4 corresponds to the length of the positioning section 52.

[0078] In this embodiment, specifically, the guide section 51 includes a transition end 511, a first inclined edge 512 and a second inclined edge 513. The number of the transition ends 511 is arranged corresponding to the positioning section 52, and the transition ends 511 and the positioning section 52 are arranged in a staggered manner.

[0079] The ports of adjacent transition ends 511 are connected by a first inclined edge 512, and adjacent positioning ports 521 are connected by a second inclined edge 513; the inclination directions of the first inclined edge 512 and the second inclined edge 513 are arranged opposite to each other, and the first inclined edge 512 is arranged opposite to the positioning port 521, and the second inclined edge 513 is arranged opposite to the transition end 511, and there is an avoidance spacing between the first inclined edge 512 and the second inclined edge 513 for the positioning block to move.

[0080] More preferably, in order to optimize the guiding effect of the limit block 14, the limit block 14 is arranged in a circular or elliptical shape. Specifically, in this embodiment, the limit block 14 is arranged in an elliptical shape.

[0081] Exemplarily, the seven positioning segments 52 represent seven flow adjustment gears that increase in sequence. For example, when it is necessary to adjust from the first gear to the second gear, the first pipeline 33 is adjusted to a normally open state, and a high-pressure hydraulic fluid is injected into the second pipeline 34. The injected hydraulic fluid will drive the movable pipe segment 2 to move, and the current limit block 14 will gradually move from the closed end 522 of the positioning segment 52 to the positioning port 521. The continued movement of the movable pipe segment 2 will cause the limit block 14 to contact the first bevel opposite, until the limit block 14 squeezes the first bevel and enters the corresponding transition end 511 under the inclined guidance of the first bevel, until the limit block 14 contacts the bottom of the transition end 511. At this time, the movable pipe segment 2 is restricted from continuing to move, and the through groove 4 is in a transitional closed state completely blocked by the movable pipe segment 2. The wellhead can know whether the movable pipe segment 2 is in place through the pressure of the hydraulic fluid.

[0082] After knowing that the through slot 4 is in the transitional closed state, the movable pipe section 2 is controlled to move in the reverse direction. The well operator adjusts the second pipeline 34 to the normally open state, and injects high-pressure hydraulic fluid into the first pipeline 33. The hydraulic fluid injected by the first pipeline 33 will drive the movable pipe section 2 to move in the direction of leaving the through slot 4 to gradually open the through slot 4. At this time, the limit block 14 gradually separates from the transition end 511 and gradually contacts the opposite second bevel. When the movable pipe section 2 continues to move, the second bevel guides the limit block 14 and enters the positioning section 52 of the second gear position adjacent to the first gear position, until the limit block 14 continues to move to the closed end 522 of the positioning section 52, the movement of the movable pipe section 2 is restricted again, and the open length of the through slot 4 corresponds to the length of the positioning section 52. At this time, the through slot 4 is adjusted to the flow gear corresponding to the gear position. Similarly, whether the movable pipe section 2 is in place is known on the well by the pressure of the hydraulic fluid.

[0083] When the flow rate needs to be increased again in the future, the above operation can be repeated in a cycle. It should be noted that when downshifting, the limit block 14 needs to complete one circle of adjustment operation in the guide groove structure 5, which has a time problem. However, due to the long length of the overall downhole pipeline in the downhole operation, the flow rate change in the downhole is not adjusted instantaneously during the adjustment process, and there is no requirement for the timeliness of the adjustment. Therefore, the timeliness of the adjustment will not have an adverse effect on the overall operation during the downhole operation.

[0084] In addition, during the adjustment process, the operator on the well cannot observe which gear position the limit block 14 is in, but each positioning section 52 has a different length, and the operator can observe the flow rate of the injected hydraulic control fluid and the gear position. At the same time, the operator can also determine the current gear position based on the flow rate feedback from the downhole measurement equipment.

[0085] In this embodiment, it is more preferred that one of the transition ends 511 extends in a direction away from the positioning segment 52 to form a zero-position segment, and the zero-position segment is located between the positioning segments 52 corresponding to the highest gear position and the lowest gear position.

[0086] The setting of the zero position segment can facilitate the operating personnel to carry out daily maintenance operations. At the same time, the setting of the zero position segment can also serve as a reminder for well operations.

[0087] Reference Figure 7 As shown, in this embodiment, the overall positions of the first inclined edge 512 and the second inclined edge 513 corresponding to each positioning port 521, the transition end 511 are further refined, the positioning port 521 is located at the middle position corresponding to the first inclined edge 512, and the transition end 511 is located at the middle position corresponding to the second inclined edge 513, so as to optimize the guiding effect of the overall structure.

[0088] Reference Figure 8 As shown, in some embodiments, a sealing plate 6 is provided at the through groove 4, and seven through holes 61 are opened on the sealing plate 6 corresponding to the positions of the seven positioning segments 52. When the limit block 14 is located at the positioning segment 52 corresponding to the 1st gear, the movable pipe segment 2 is disengaged from one through hole 61, and when the limit block 14 is located at the positioning segment 52 corresponding to the 7th gear, the movable pipe segment 2 is disengaged from all seven through holes 61. The setting of this structure is suitable for underground operations with higher flow control accuracy, and the operating personnel can make adaptive selections for installation during the early installation of operations according to the actual situation on site.

[0089] The present invention also provides a better implementation method, referring to Fig. 9 as well as Fig.10 As shown, a flow monitoring component 7 is also provided in the pipeline component to monitor the liquid flow in the pipeline component. In this embodiment, the flow monitoring component 7 is specifically a thermal flow meter monitoring, specifically, the flow monitoring component 7 includes an outer cylinder 71, an inner cylinder 72, a heating belt 73 and a temperature sensor 74.

[0090] The outer cylinder 71 is fixedly connected to the second pipe section 13, and a confluence area 75 for liquid flow is formed between the outer edge of the outer cylinder 71 and the inner wall of the second pipe section 13, and the inner cylinder 72 is coaxially sealed and arranged inside the outer cylinder 71. The heating belt 73 is sleeved on the outer edge of the inner cylinder 72, and the heating belt 73 is used to heat the outer cylinder 71. A plurality of temperature sensors 74 are provided and are arranged at intervals on the heating belt 73, and the temperature sensors 74 are used to monitor the temperature of the outer cylinder 71.

[0091] In addition, specifically, at the end of the second pipe segment 13, a connecting pipe fitting 8 is sealed and connected, the outer edge of the connecting pipe fitting 8 is sealed and connected to the port thread of the second pipe segment 13, one end of the connecting pipe fitting 8 is connected to the lower pipeline through an internal thread, and the other end of the connecting pipe fitting 8 is inserted into the second pipe segment 13, and a groove body 81 is opened on the inner wall of the connecting pipe fitting 8, and the groove body 81 is used to connect the liquid in the second pipe segment 13.

[0092] The flow monitoring assembly 7 also includes a cable connector 77, and the outer tube 71 is specifically a fixed installation component of the flow monitoring assembly 7. One end of the outer tube 71 is threadedly connected to the insertion end of the connecting pipe 8, and the other end is threadedly connected to the end of the fixed bone segment 11 to achieve overall installation and fixation.

[0093] The power supply of the flow monitoring component 7 and the feedback of the monitoring data are both connected to the well through the cable connector 77, and the well control system is connected to the cable connector 77 downhole through the single-core steel pipe cable for signal transmission.

[0094] It should be noted that three temperature sensors 74 are arranged along the axial direction of the inner tube 72, and four groups are evenly distributed along the circumferential direction. During operation, the heating belt 73 heats the outer edge of the outer tube 71, and the temperature sensor 74 monitors the temperature of the outer tube 71, and feeds back the measurement signal to the well control system through the cable plug. When the fluid passes through, the flow of the fluid will carry away part of the heat of the outer edge of the outer tube 71, and the temperature sensor 74 can monitor the temperature change in real time, and then analyze the heat carried away by the fluid, and analyze the flow rate, water content and other physical parameters of the fluid from the heat carried away.

[0095] More preferably, in order to achieve the heat preservation effect, a heat insulation layer 76 is provided on one side of the heating belt 73 , wherein a closed space is formed between the inner end of the outer cylinder 71 and the heat insulation layer 76 , which can achieve a better heat preservation effect on the heat of the heating belt 73 .

[0096] Through the setting of this structure, the present invention can integrate regulation and monitoring. After completing the installation of the device and all underground pipelines, during the working process, the staff can adjust the flow rate by hydraulic control according to the data feedback of the flow monitoring component 7. The overall adjustment structure is simple, which can facilitate the completion of the underground installation operation. At the same time, the hydraulic control adjustment method also has a higher adjustment stability.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A downhole flow regulating device, characterized in that: include: A pipeline assembly, the pipeline assembly is used to connect the underground pipeline, a fixed pipe section is arranged inside the pipeline assembly, one end of the fixed pipe section is a plugged end, and the other end is an open end, a through groove is opened on the side of the fixed pipe section, and the fluid flows in from one end of the pipeline assembly, flows through the fixed pipe section and the through groove in sequence, and then flows out from the other end of the pipeline assembly; A movable pipe segment, the movable pipe segment is arranged inside the pipeline assembly and is movably connected to the pipeline assembly; the outer wall of the movable pipe segment is sealedly connected to the inner wall of the fixed pipe segment to block the through groove; as well as A hydraulic control assembly, the hydraulic control assembly includes a hydraulic control pipeline and a hydraulic control component, the hydraulic control component is connected to the pipeline assembly and the movable pipe section, the hydraulic control pipeline is extended to the wellbore, the hydraulic control pipeline is used to control the movable pipe section to move in the pipeline assembly, and drives the end of the movable pipeline to move at the through groove to adjust the blocking area of ​​the through groove.

2. The downhole flow regulating device according to claim 1, characterized in that: The pipeline assembly comprises: a first pipe section, one end of which is used to connect to a downhole pipeline, and the other end of which is connected to the fixed pipe section; and The second pipe section is sleeved on the outside of the first pipe section, and a cavity for fluid to pass through is provided between the second pipe section and the fixed pipe section, the cavity is connected with the fixed pipe section through the through groove, and the second pipe section is used for connecting to the downhole pipeline.

3. The downhole flow regulating device according to claim 2, characterized in that: The hydraulic control component comprises: an annular groove, the annular groove is formed on the inner wall of the first pipe section, the outer edge of the movable pipe section seals the groove edge of the annular groove, the movable pipe section and the annular groove form a hydraulic control cavity for hydraulic control liquid to enter; the hydraulic control pipeline includes a first pipeline and a second pipeline, the two ends of the hydraulic control cavity along the axial direction are respectively provided with a first connecting port and a second connecting port, the first connecting port is connected to the first pipeline, and the second connecting port is connected to the second pipeline; and A first seal, wherein the first seal sleeve is disposed on the outer edge of the movable pipe section, the first seal is located inside the annular groove, and the first seal is used to seal and isolate the first connecting port from the second connecting port; When the first seal moves to one side of the hydraulic control chamber, the movable pipe section closes the through groove; When the first seal moves to the other side of the hydraulic control cavity, the movable pipe section is separated from the through groove.

4. The downhole flow regulating device according to claim 3, characterized in that: Limiting rings are arranged on both sides of the first seal.

5. The downhole flow regulating device according to any one of claims 1 to 4, characterized in that: The inner wall of the fixed pipe section is provided with a limit block, and the movable pipe section is also provided with a guide groove structure, and the guide groove structure is arranged corresponding to the limit block; The guide groove structure includes a guide section and at least three positioning sections, and the number and length of the positioning sections are arranged in a gradient manner corresponding to the total length of the through groove; the positioning sections are arranged at even intervals along the circumference of the movable pipe section, and one end of the positioning section is a positioning port and the other end is a closed end, the positioning ports are flush with each other, and the positioning port is connected to the guide section; When the movement of the movable pipe segment drives the limit block to enter the guide segment from one of the positioning ports, the movable pipe segment closes the through slot, and the guide segment guides the movable pipe segment to rotate; when the movable pipe segment moves in the opposite direction, the limit block continues to rotate under the guidance of the guide segment until it enters the adjacent positioning port, and when the limit block moves to the closed end corresponding to the positioning segment, the open length of the through slot corresponds to the length of the positioning segment.

6. The downhole flow regulating device according to claim 5, characterized in that: The guide section includes a transition end, a first inclined edge, and a second inclined edge; The number of the transition ends is set corresponding to the positioning segments, and the transition ends and the positioning segments are staggered; The ports adjacent to the transition ends are connected by the first inclined edge, and the adjacent positioning ports are connected by the second inclined edge; the inclination directions of the first inclined edge and the second inclined edge are arranged opposite to each other, and the first inclined edge is arranged opposite to the positioning port, and the second inclined edge is arranged opposite to the transition end, and there is an avoidance spacing between the first inclined edge and the second inclined edge for the positioning block to move.

7. The downhole flow regulating device according to claim 6, characterized in that: One of the transition ends extends in a direction away from the positioning segment to form a zero position segment, and the zero position segment is located between the positioning segments corresponding to the highest gear and the lowest gear.

8. The downhole flow regulating device according to claim 6, characterized in that: The positioning port is located at a middle position corresponding to the first inclined edge, and the transition end is located at a middle position corresponding to the second inclined edge.

9. The downhole flow regulating device according to claim 6, characterized in that: The limiting block is arranged in a circular or elliptical shape.

10. The downhole flow regulating device according to claim 6, characterized in that: The number of positioning segments is 7.

11. The downhole flow regulating device according to claim 2, characterized in that: A flow monitoring component is also provided in the pipeline component to monitor the liquid flow in the pipeline component.

12. The downhole flow regulating device according to claim 11, characterized in that: The flow monitoring component comprises: An outer cylinder, wherein the outer cylinder is fixedly connected to the second pipe section, and a confluence area for liquid flow is formed between the outer edge of the outer cylinder and the inner wall of the second pipe section; An inner cylinder, wherein the inner cylinder is coaxially sealed and arranged inside the outer cylinder; A heating belt, the heating belt is sleeved on the outer edge of the inner cylinder, and the heating belt is used to heat the outer cylinder; and A temperature sensor is provided in plurality and is arranged at intervals on the heating belt. The temperature sensor is used to monitor the temperature of the outer cylinder.

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