Segmented telescoping conveyance for downhole servicing string

Abstract

The utility model discloses a segmented telescopic conveying device of downhole operation pipe column, and is characterized in that a conveying pipe body is sleeved in the fixed lumen of the oil pipe bridge, a plurality of bearing sleeves are sleeved on the outer circumference of the conveying pipe body exposed from the fixed lumen, a fixing assembly is penetrated in the inner cavity of the conveying pipe body, the extruding block of the inner side end of the fixing assembly is in extruding contact with the elastic sheet of the inner port of the conveying pipe body, and the outer side end of the fixing assembly is threadedly sleeved with the threaded hole of the locking assembly and exposed from the threaded section of the conveying pipe body. The utility model belongs to the technical field of petroleum engineering equipment, and solves the problems of unreasonable structure, low conveying efficiency, high labor intensity and hidden safety hazards of the conveying equipment of the downhole operation pipe column in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of petroleum engineering equipment technology, and relates to a segmented telescopic conveying device for downhole operation tubing. Background Technology

[0002] During minor, intermediate, and major well repairs, frequent tripping of the tubing string is required. This task accounts for more than 80% of the total workload of downhole operations and is the most labor-intensive part of downhole operations. Therefore, the optimization and modification of the operating equipment in this part is directly related to the overall construction efficiency.

[0003] When running tubing, the tubing needs to be lifted out of the wellhead using hoisting equipment, and then unloaded one by one onto the tubing bridge. After cleaning, measuring, reassembling, and replacing the downhole tools, the tubing is then lowered back into the well. During this process, manual labor is required to assemble and repair the tubing delivery channels. The existing technology has rudimentary facilities and primitive operating methods, mainly relying on manual labor, which is labor-intensive, poses significant safety hazards, and greatly restricts work efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a segmented telescopic conveying device for downhole working tubing, which solves the problems of unreasonable structure, low conveying efficiency, high labor intensity and safety hazards in existing downhole working tubing conveying equipment.

[0005] The technical solution adopted by this utility model is a segmented telescopic conveying device for downhole work tubing. A conveying pipe body is installed in the fixed cavity of the tubing bridge. Multiple bearing sleeves are installed on the outer circumference of the conveying pipe body that protrudes from the fixed cavity. A fixing component passes through the inner cavity of the conveying pipe body. The extrusion block at the inner end of the fixing component is in extrusion contact with the elastic sheet at the inner end of the conveying pipe body. The threaded section at the outer end of the fixing component that protrudes from the conveying pipe body is threadedly engaged with the threaded hole of the locking component.

[0006] The segmented telescopic conveying device for downhole working tubing of this utility model is further characterized by:

[0007] The structure of the conveying pipe is such that multiple slits are cut along the axial direction on the inner wall of the inner end of the conveying pipe. These slits cause multiple elastic plates to be formed on the inner end of the conveying pipe, and all the elastic plates are evenly arranged along the circumference.

[0008] The number of slits is 3 to 8, and correspondingly, these slits form 3 to 8 elastic plates on the inner end of the delivery tube.

[0009] The structure of the fixing component includes a connecting rod, a pressing block fixed to the inner end of the connecting rod, and a threaded section on the outer wall of the other end of the connecting rod.

[0010] The extrusion block is a cone.

[0011] The extrusion block is a triangular cone.

[0012] When the extrusion block is a triangular pyramid, there are three corresponding elastic plates, and the inner wall of the elastic plate is provided with alignment marks.

[0013] Each elastic sheet has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe. A limiting groove is formed between the two raised markings to hold the end of the triangular cone of the extrusion block, so that the end of the triangular cone of each extrusion block can be aligned with an elastic sheet.

[0014] The extrusion block is a cruciform cone.

[0015] When the extrusion block is a cross cone, there are four corresponding elastic plates, and the inner wall of the elastic plate is provided with alignment marks.

[0016] Each elastic sheet has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying tube. A limiting groove is formed between the two raised markings to hold the end of the cross cone of the extrusion block, so that the end of the cross cone of each extrusion block can be aligned with an elastic sheet.

[0017] The maximum outer diameter of the extrusion block is greater than the inner diameter of the conveying pipe, but less than the outer diameter of the conveying pipe.

[0018] The locking assembly consists of a locking block and a drive handle. The locking block is a stepped cylindrical shape, and multiple drive handles are installed on the outer circumference of its large-diameter outer step. A threaded hole is opened in the axis of the locking block, and the small-diameter outer circle of the locking block is called a boss.

[0019] The outer wall of the drive handle is provided with anti-slip texture.

[0020] The outer diameter of the large-diameter outer circular step of the locking block is greater than the inner diameter of the conveying pipe, and the outer diameter of the boss is smaller than the inner diameter of the conveying pipe.

[0021] The beneficial effects of this utility model are that it has a simple structure, is easy to install, can reduce the labor intensity of workers and improve work efficiency, including the following aspects:

[0022] 1) By pulling the fixing component, the inner end of the delivery pipe expands, thereby conveniently fixing the delivery pipe to the end of the oil pipe bridge. The outer length of the delivery pipe can be adjusted according to the fixed position. Multiple bearing sleeves can be installed on the outside of the delivery pipe as needed. When the pipe column is lifted or lowered, the pipe column can roll on the bearing sleeves, reducing the labor intensity of the workers.

[0023] 2) Multiple independent bearing sleeves are fitted on the outside of the conveying pipe. When the pipe column is tilted and pulled, only the single bearing sleeve supporting the pipe column needs to rotate, which reduces the rolling friction.

[0024] 3) It has achieved semi-automation of the tubing conveying process, which has significantly improved the efficiency of operation. It is expected to increase the efficiency of tubing lifting and lowering operations by more than 30%.

[0025] 4) It reduces the labor intensity of workers and reduces the risk of occupational injuries caused by manual operations.

[0026] 5) It has a simple structure, low manufacturing cost, and is easy to promote and apply on a large scale. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0028] Figure 2 This is a schematic diagram of the disassembled structure of the device of this utility model;

[0029] Figure 3 This is a schematic diagram of the conveying pipe body in the device of this utility model;

[0030] Figure 4 This is a schematic diagram of the fixing component in the device of this utility model;

[0031] Figure 5 This is a schematic diagram of the fixing component in the device of this utility model, which adopts a triangular pyramid shape.

[0032] Figure 6 A schematic diagram of the cross-shaped structure of the fixing component in the device of this utility model;

[0033] Figure 7 This is a schematic diagram of the locking assembly in the device of this utility model;

[0034] Figure 8 This is a schematic diagram showing the usage state of the device of this utility model.

[0035] In the diagram, 1 is the delivery pipe; 2 is the bearing sleeve; 3 is the locking assembly; 4 is the fixing assembly; 5 is the oil pipe bridge; 6 is the pipe string; 101 is the slit; 102 is the elastic plate; 301 is the locking block; 302 is the drive handle; 303 is the threaded hole; 304 is the boss; 401 is the connecting rod; 402 is the extrusion block; and 403 is the threaded section. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figure 1 , Figure 2The structure of the downhole operation tubing segmented telescopic conveying device of this utility model includes a conveying pipe body 1. Multiple bearing sleeves 2 are fitted on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0038] See Figure 8 The inner end of the conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the oil pipe bridge 5 to support the pipe column 6 that needs to be lifted and lowered; multiple bearing sleeves 2 are arranged and are sleeved on the outside of the conveying pipe body 1 as needed, so that the pipe column 6 rolls on the bearing sleeve 2 when lifting and lowering the pipe column 6.

[0039] The fixing component 4 is installed through the inner cavity of the delivery pipe body 1. By pulling, the inner end of the delivery pipe body 1 expands and is fixed in the fixing cavity of the oil pipe bridge 5.

[0040] The locking component 3 is located outside the outer port of the delivery pipe body 1 and is threadedly connected to the fixing component 4. By rotating, the fixing component 4 is pulled to securely fix the delivery pipe body 1 to the oil pipe bridge 5.

[0041] like Figure 3 The conveying pipe 1 has a structure in which multiple slits 101 are cut axially on the inner wall of the conveying pipe 1. These slits 101 form multiple elastic plates 102 on the inner end of the conveying pipe 1, and all elastic plates 102 are evenly arranged circumferentially. The material of the part where the elastic plates 102 are located can be a material with better elasticity than the main body of the conveying pipe 1.

[0042] like Figure 4 , Figure 5 , Figure 6 The structure of the fixing component 4 includes a connecting rod 401, with a pressing block 402 fixed to the inner end of the connecting rod 401, and a threaded section 403 (or threaded protrusion) on the outer wall of the other end of the connecting rod 401. The pressing block 402 can be a cone (see...). Figure 4 ), triangular vertebra (see Figure 5 ) or cruciate vertebrae (see Figure 6 ).

[0043] In use, the connecting rod 401 extends into the inner cavity of the conveying pipe body 1, and the squeezing block 402 extends out of the inner end of the conveying pipe body 1. The threaded section 403 is fitted with a locking component 3 by means of threaded connection. By pulling the connecting rod 401, the squeezing block 402 squeezes the elastic piece 102 on the conveying pipe body 1, causing each elastic piece 102 to expand radially outward until it is locked in the cavity of the oil pipe bridge 5, thereby fixing the conveying pipe body 1 in the oil pipe bridge 5.

[0044] The maximum outer diameter of the extrusion block 402 is greater than the inner diameter of the conveying tube 1 and less than the outer diameter of the conveying tube 1, ensuring that the extrusion block 402 can provide sufficient expansion force to the elastic sheet 102 and that the extrusion block 402 can extend into the cavity of the tube column 6 along with the conveying tube 1.

[0045] like Figure 7 The locking assembly 3 comprises a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 (three in this embodiment) are installed on the outer circumference of its large-diameter outer step. The outer wall of the drive handle 302 is provided with anti-slip texture to increase friction and facilitate gripping. A threaded hole 303 is opened in the axis of the locking block 301, and the small-diameter outer circle of the locking block 301 is called a boss 304. The outer diameter of the large-diameter outer step of the locking block 301 is larger than the inner diameter of the conveying pipe 1, and the outer diameter of the boss 304 is smaller than the inner diameter of the conveying pipe 1, so that the boss 304 can be fitted into the inner wall of the conveying pipe 1 and engage with the threaded section 403 at the outer end of the connecting rod 401.

[0046] In use, the boss 304 is inserted into the inner cavity of the conveying pipe 1, and the large-diameter outer circular step of the locking block 301 abuts against the port of the conveying pipe 1, thereby ensuring that the connecting rod 401 is pulled. The locking block 301 is threadedly connected to the threaded section 403 on the outer end of the connecting rod 401 through the threaded hole 303. Then, the drive handle 302 is rotated, so that the locking block 301 and the connecting rod 401 rotate relative to each other. Due to the limitation of the outer port of the conveying pipe 1, the connecting rod 401 and the squeezing block 402 are pulled.

[0047] The working principle and working process of this utility model device are as follows:

[0048] In use, first determine the installation length of the delivery pipe 1 in the tubing bridge 5 according to the pre-set positions of the tubing bridge 5 and the wellhead, and then, as needed, install multiple bearing sleeves 2 on the outside of the delivery pipe 1. Insert the delivery pipe 1, which is fitted with the fixing component 4, into the fixing cavity of the tubing bridge 5. Fit the locking component 3 on the threaded section 403 at the outer end of the fixing component 4. Then, rotate the drive handle 302 to make the locking block 301 and the connecting rod 401 rotate relative to each other, thereby pulling the connecting rod 401 and its compression block 402. The compression block 402 forces the elastic plate 102 to expand radially outward, thereby expanding the inner end of the delivery pipe 1 and thus conveniently and securely fixing the delivery pipe 1 to the end of the tubing bridge 5.

[0049] like Figure 8As shown, when lifting or lowering the tubing string 6, the tubing string 6 can roll on the bearing sleeve 2, reducing the labor intensity of direct handling by the workers. In addition, since the distance and position between the oil pipe bridge 5 and each tubing string 6 may be deviated, the tubing string 6 needs to be tilted and dragged when lifting or lowering it. However, when the tubing string 6 is tilted and pulled, only the single bearing sleeve 2 supporting the tubing string 6 needs to rotate, which reduces the rolling friction and reduces the labor intensity of the workers.

[0050] Example 1

[0051] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0052] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0053] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 4. The 4 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0054] Example 2

[0055] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0056] The structure of the conveying pipe 1 is such that six slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make six elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0057] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed to the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401. The pressing block 402 is a cone.

[0058] Five bearing sleeves 2 are fitted on the outside of the conveying pipe body 1. The five bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0059] Example 3

[0060] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0061] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0062] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0063] like Figure 4 The extrusion block 402 is conical in shape, and the maximum outer diameter of the extrusion block 402 is greater than the inner diameter of the conveying pipe body 1 and less than the outer diameter of the conveying pipe body 1, so that the extrusion block 402 can provide expansion force to the elastic sheet 102 and allow the extrusion block 402 to extend into the cavity of the pipe column 6 along with the conveying pipe body 1.

[0064] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 3. The 3 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0065] Example 4

[0066] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0067] The structure of the conveying pipe 1 is such that three slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make three elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0068] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0069] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0070] like Figure 5 The extrusion block 402 is in the shape of a triangular pyramid, and there are three corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0071] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the triangular cone end of the extrusion block 402, ensuring that the triangular cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0072] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 4. The 4 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0073] Example 5

[0074] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0075] The structure of the conveying pipe 1 is such that eight slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make eight elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0076] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0077] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0078] like Figure 6 The extrusion block 402 is in the shape of a cross cone, and there are four corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0079] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the cross cone end of the extrusion block 402, so as to ensure that the cross cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0080] Five bearing sleeves 2 are fitted on the outside of the conveying pipe body 1. The five bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0081] Example 6

[0082] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0083] The structure of the conveying pipe 1 is such that six slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make six elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0084] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0085] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0086] like Figure 4 The extrusion block 402 is conical in shape, and the maximum outer diameter of the extrusion block 402 is greater than the inner diameter of the conveying pipe body 1 and less than the outer diameter of the conveying pipe body 1, so that the extrusion block 402 can provide expansion force to the elastic sheet 102 and allow the extrusion block 402 to extend into the cavity of the pipe column 6 along with the conveying pipe body 1.

[0087] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 3. The 3 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0088] Example 7

[0089] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0090] The structure of the conveying pipe 1 is such that six slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make six elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0091] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed to the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401. The pressing block 402 is a cone.

[0092] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0093] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 4. The 4 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0094] Example 8

[0095] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0096] The structure of the conveying pipe 1 is such that three slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make three elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0097] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed to the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401. The pressing block 402 is a cone.

[0098] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0099] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 5. The 5 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0100] like Figure 8 As shown, the tubing bridge 5 is fixedly installed on the ground near the oil well. The tubing bridge 5 holds 3 to 8 tubing strings 6, each with a length of 9.6 meters and an outer diameter of 73 millimeters.

[0101] One end of the tubing 6 is an enlarged joint with internal threads on the inner wall, and the other end of the tubing 6 is externally threaded. In use, the externally threaded end of the tubing 6 is connected to the internally threaded end of the adjacent tubing 6.

[0102] Example 9

[0103] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0104] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0105] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed to the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401. The pressing block 402 is a cone.

[0106] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0107] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 2. The two bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0108] When the tubing 6 is lifted, the tubing 6 rolls on the bearing sleeve 2, which can reduce the labor intensity of the workers.

[0109] Example 10

[0110] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0111] The structure of the conveying pipe 1 is such that three slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make three elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0112] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0113] like Figure 5 The extrusion block 402 is in the shape of a triangular pyramid, and there are three corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0114] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the triangular cone end of the extrusion block 402, ensuring that the triangular cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0115] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0116] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 3. The 3 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0117] When the tubing 6 is lifted, the tubing 6 rolls on the bearing sleeve 2, which can reduce the labor intensity of the workers.

[0118] Example 11

[0119] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0120] The structure of the conveying pipe 1 is such that three slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make three elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0121] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0122] like Figure 5 The extrusion block 402 is in the shape of a triangular pyramid, and there are three corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0123] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the triangular cone end of the extrusion block 402, ensuring that the triangular cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0124] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0125] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 4. The 4 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0126] The four bearing sleeves 2 can increase the load-bearing length of the conveying pipe 1, thereby increasing the load-bearing space. When the pipe column 6 is lifted or lowered, the pipe column 6 rolls on the bearing sleeves 2, which can reduce the labor intensity of the workers.

[0127] Example 12

[0128] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0129] The structure of the conveying pipe 1 is such that three slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make three elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0130] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0131] like Figure 5 The extrusion block 402 is in the shape of a triangular pyramid, and there are three corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0132] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the triangular cone end of the extrusion block 402, ensuring that the triangular cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0133] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0134] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 5. The 5 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0135] The five bearing sleeves 2 can further increase the load-bearing length of the conveying pipe 1, thereby increasing the load-bearing space. When the pipe column 6 is lifted or lowered, the pipe column 6 rolls on the bearing sleeves 2, which can reduce the labor intensity of the workers.

[0136] Example 13

[0137] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0138] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0139] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0140] like Figure 6 The extrusion block 402 is in the shape of a cross cone, and there are four corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0141] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the cross cone end of the extrusion block 402, so as to ensure that the cross cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0142] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0143] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 3. The 3 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0144] Example 14

[0145] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0146] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0147] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0148] like Figure 6 The extrusion block 402 is in the shape of a cross cone, and there are four corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0149] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the cross cone end of the extrusion block 402, so as to ensure that the cross cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0150] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0151] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 4. The 4 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0152] Example 15

[0153] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0154] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0155] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0156] like Figure 6 The extrusion block 402 is in the shape of a cross cone, and there are four corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0157] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the cross cone end of the extrusion block 402, so as to ensure that the cross cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0158] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0159] Five bearing sleeves 2 are fitted on the outside of the conveying pipe body 1. The five bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0160] Example 16

[0161] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0162] The structure of the conveying pipe 1 is such that three slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make three elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0163] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0164] like Figure 5 The extrusion block 402 is in the shape of a triangular pyramid, and there are three corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0165] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the triangular cone end of the extrusion block 402, ensuring that the triangular cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0166] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 7. The 7 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0167] The seven bearing sleeves 2 can increase the load-bearing length of the conveying pipe 1, thereby increasing the load-bearing space. When the pipe column 6 is lifted or lowered, the pipe column 6 rolls on the bearing sleeves 2, which can reduce the labor intensity of the workers.

[0168] Example 17

[0169] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0170] The structure of the conveying pipe 1 is such that three slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make three elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0171] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0172] like Figure 5 The extrusion block 402 is in the shape of a triangular pyramid, and there are three corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0173] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the triangular cone end of the extrusion block 402, ensuring that the triangular cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0174] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0175] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 8. The 8 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0176] The eight bearing sleeves 2 can further increase the load-bearing length of the conveying pipe 1, thereby increasing the load-bearing space. When the pipe column 6 is lifted or lowered, the pipe column 6 rolls on the bearing sleeves 2, which can reduce the labor intensity of the workers.

[0177] Example 18

[0178] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0179] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0180] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0181] like Figure 6 The extrusion block 402 is in the shape of a cross cone, and there are four corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0182] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the cross cone end of the extrusion block 402, so as to ensure that the cross cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0183] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0184] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 6. The 6 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0185] Example 19

[0186] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0187] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0188] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0189] like Figure 6 The extrusion block 402 is in the shape of a cross cone, and there are four corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0190] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the cross cone end of the extrusion block 402, so as to ensure that the cross cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0191] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0192] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 7. The 7 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0193] Example 20

[0194] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0195] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0196] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed on the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401.

[0197] like Figure 6 The extrusion block 402 is in the shape of a cross cone, and there are four corresponding elastic sheets 102. The inner wall of the elastic sheet 102 is provided with alignment marks.

[0198] Specifically, each elastic sheet 102 has raised markings on both sides of its inner wall, and the markings are set along the axial direction of the conveying pipe 1. A limiting groove is formed between the two raised markings to lock the cross cone end of the extrusion block 402, so as to ensure that the cross cone end of each extrusion block 402 can be aligned with an elastic sheet 102 during use, thereby ensuring the expansion effect.

[0199] The locking assembly 3 has the following structure: a locking block 301 and a drive handle 302. The locking block 301 is a stepped cylindrical shape, and multiple drive handles 302 are installed on the outer circumference of its large-diameter outer step. The locking block 301 has a threaded hole 303 at its axis, and the small-diameter outer circle of the locking block 301 is called a boss 304.

[0200] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 8. The 8 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0201] Example 21

[0202] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0203] The structure of the conveying pipe 1 is such that eight slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make eight elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0204] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed to the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401. The pressing block 402 is a cone.

[0205] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 8. The 8 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0206] Example 22

[0207] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0208] The structure of the conveying pipe 1 is such that six slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make six elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0209] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed to the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401. The pressing block 402 is a cone.

[0210] The number of bearing sleeves 2 fitted on the outside of the conveying pipe body 1 is 6. The 6 bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0211] Example 23

[0212] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0213] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0214] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed to the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401. The pressing block 402 is a cone.

[0215] Ten bearing sleeves 2 are fitted on the outside of the conveying pipe body 1. The ten bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0216] Example 24

[0217] The downhole operation tubing string segmented telescopic conveying device has the following overall structure: a conveying pipe body 1 is installed in the fixed cavity at the inlet and outlet of the tubing bridge 5. Multiple bearing sleeves 2 are installed on the outer circumference of the conveying pipe body 1 that protrudes from the fixed cavity. A fixing component 4 passes through the inner cavity of the conveying pipe body 1. The extrusion block 402 at the inner end of the fixing component 4 is in extrusion contact with the elastic plate 102 at the inner port of the conveying pipe body 1. The threaded section 403 at the outer end of the fixing component 4 that protrudes from the conveying pipe body 1 is threadedly connected to the threaded hole 303 of the locking component 3.

[0218] The structure of the conveying pipe 1 is such that four slits 101 are opened axially on the pipe wall at the inner end of the conveying pipe 1. These slits 101 make four elastic plates 102 form at the inner end of the conveying pipe 1, and all the elastic plates 102 are evenly arranged along the circumference.

[0219] The structure of the fixing component 4 includes a connecting rod 401, a pressing block 402 fixed to the inner end of the connecting rod 401, and a threaded section 403 on the outer wall of the other end of the connecting rod 401. The pressing block 402 is a cone.

[0220] Ten bearing sleeves 2 are fitted on the outside of the conveying pipe body 1. The ten bearing sleeves 2 are limited by the end of the oil pipe bridge 5 and the locking assembly 3, so that the bearing sleeves 2 will not move along the axial direction of the conveying pipe body 1, while ensuring that the bearing sleeves 2 can roll on the conveying pipe body 1.

[0221] Conclusions of comparative experiments between this invention and existing technologies:

[0222] 1) Labor intensity is significantly reduced.

[0223] The original working mode: the coefficient of sliding friction between the drill pipe and the drill pipe bridge is as high as 0.45 to 0.55, requiring 2 to 3 people to operate, which is extremely labor-intensive.

[0224] After the application of this utility model device:

[0225] The coefficient of friction is reduced to 0.05 (rolling friction), and the number of operators is reduced to 1.

[0226] The drill pipe conveying position has changed from the "most labor-intensive position" to the "preferred position for employees", significantly improving the comfort of workers.

[0227] 2) Work efficiency has been significantly improved.

[0228] Daily workload: Add 50 drill rods to the workload for each effective construction day.

[0229] Construction period: The average construction period for a single well has been shortened by 5 days, resulting in a significant improvement in overall operational efficiency.

[0230] 3) The ability to be applied in all scenarios has been significantly improved.

[0231] Site adaptability: The device can be plugged into and fixed to the pipe bridge, and its length can be freely extended from 0.2 meters to 1.8 meters to match the site according to the terrain. 1 to 12 rollers can be spliced ​​together arbitrarily.

[0232] Drill pipe compatibility: Adjustable via variable thread coupling, covering all drill pipe models.

[0233] Pipeline adaptability: It can be extended to various pipeline operations.

[0234] Slide Adaptation: The slide limit groove adjustment range is 220mm~350mm, which fully matches the slide standard for well workover operations.

[0235] in conclusion:

[0236] 1) Significant economic benefits.

[0237] Cost savings: A total of 5.76 million yuan in construction costs were saved.

[0238] Increased production benefits: The production of crude oil increased by 744 tons, which, at a price of 4,500 yuan per ton, generated a revenue of 3.348 million yuan.

[0239] Overall benefits: Total economic benefits reached 8.646 million yuan (cost savings + increased production revenue).

[0240] 2) Outstanding social benefits.

[0241] Human resource optimization: Reduce on-site operators and lower the risk of human-caused accidents.

[0242] Technology Leadership: As the first of its kind in China, this device promotes the upgrading of well workover operation technology.

[0243] 3) Promote and apply the results.

[0244] Production scale: Mass production has been completed, and it has the foundation for large-scale promotion.

[0245] Application coverage: It has been put into use at dozens of construction sites of multiple units;

[0246] User feedback: On-site operators generally approve, saying it "significantly liberates productivity".

[0247] This device has achieved a quadruple breakthrough in "cost reduction, efficiency improvement, safety, and comfort" through technological innovation, which is of revolutionary significance in the field of oilfield well workover. It is recommended to further expand its application scope.

Claims

1. A segmented telescoping conveyance device for a downhole servicing string, characterized by: The conveying pipe body (1) is sleeved in the fixed lumen of the tubing bridge (5), a plurality of bearing sleeves (2) are sleeved on the outer circumference of the fixed lumen exposed by the conveying pipe body (1), the fixed assembly (4) penetrates through the inner cavity of the conveying pipe body (1), the extrusion block (402) at the inner side end of the fixed assembly (4) is in extrusion contact with the elastic sheet (102) of the inner port of the conveying pipe body (1), and the threaded segment (403) of the outer side end of the fixed assembly (4) exposed from the conveying pipe body (1) is threadedly sleeved with the threaded hole (303) of the locking assembly (3).

2. The segmented, telescoping conveyance for a well intervention string as defined in claim 1, wherein, The structure of the conveying pipe body (1) is that a plurality of slits (101) are axially formed on the pipe wall of the inner side end of the conveying pipe body (1), and the inner side end of the conveying pipe body (1) is formed into a plurality of elastic sheets (102) through the slits (101), and all the elastic sheets (102) are uniformly arranged along the circumference.

3. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 2, wherein, The slits (101) are 3-8, and correspondingly, the inner side end of the conveying pipe body (1) is formed into 3-8 elastic sheets (102).

4. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 1, wherein, The structure of the fixed assembly (4) is that the fixed assembly (4) comprises a connecting rod (401), the extrusion block (402) is fixed at the inner side end of the connecting rod (401), and the threaded segment (403) is arranged on the outer wall of the other end of the connecting rod (401).

5. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 4, wherein, The extrusion block (402) is a circular cone.

6. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 4, wherein, The extrusion block (402) is a triangular pyramid.

7. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 6, wherein, When the extrusion block (402) is a triangular pyramid, the number of corresponding elastic sheets (102) is three, and the inner wall of the elastic sheet (102) is provided with alignment marks; The inner wall of each elastic sheet (102) is provided with two protruding marks on both sides, and the marks are arranged along the axis direction of the conveying pipe body (1), and a limiting groove for clamping the triangular pyramid end of the extrusion block (402) is formed between the two protruding marks, so that the triangular pyramid end of each extrusion block (402) can be aligned with one elastic sheet (102).

8. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 4, wherein, The extrusion block (402) is a cross pyramid.

9. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 8, wherein, When the extrusion block (402) is a cross pyramid, the number of corresponding elastic sheets (102) is four, and the inner wall of the elastic sheet (102) is provided with alignment marks; The two protruding marks are arranged on both sides of the inner wall of each elastic sheet (102), and the marks are arranged along the axis direction of the conveying pipe body (1), and a cross pyramid end of the extrusion block (402) is formed between the two protruding marks, and the cross pyramid end of each extrusion block (402) can be aligned with one elastic sheet (102) through the limiting groove.

10. A sectionalized telescoping conveyance apparatus for a downhole servicing string as claimed in any one of claims 4, 5, 6, 7, 8 or 9, characterized in that, The maximum outer diameter of the extrusion block (402) is greater than the inner diameter of the conveying pipe body (1) and less than the outer diameter of the conveying pipe body (1).

11. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 1, wherein, The structure of the locking assembly (3) is that the locking assembly (3) comprises a locking block (301) and a driving handle (302), the locking block (301) is a stepped cylindrical shape, a plurality of driving handles (302) are mounted on the outer circumference of the large-diameter outer circle step of the locking block (301); the axis of the locking block (301) is provided with a threaded hole (303), and the outer circle of the small-diameter of the locking block (301) is referred to as a boss (304).

12. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 11, wherein, The outer wall of the driving handle (302) is provided with anti-skid lines.

13. The segmented, telescoping conveyance of a downhole servicing string as defined in claim 11, wherein, The outer diameter of the large-diameter outer circular step of the locking block (301) is greater than the inner diameter of the conveying pipe body (1), and the outer diameter of the boss (304) is less than the inner diameter of the conveying pipe body (1).

Images