Wellbore pipeline layout device and layout method

Abstract

The present invention provides a wellbore pipeline arrangement device and arrangement method, comprising a pipeline fixing unit; the pipeline fixing unit comprises a fixing plate and a pipeline; at least two pipeline through-holes are provided on the fixing plate; one end of the pipeline is a fixed end, and the other end is a lowering end, the fixed end of the pipeline is arranged in the pipeline through-hole and fixedly connected to the pipeline through-hole by a fixing element, and the pipe body of the pipeline is arranged along the inner wall of the wellbore; a reinforcement structure is provided between the fixing elements. The present invention can solve the problems in the existing technology such as the large number of filling boreholes occupying a large surface area, the long construction period, the difficulty in finding the filling boreholes underground, the poor ventilation of the underground drilling duct, and the large deviation of the boreholes causing the filling pipe to wear out and have a short service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of mining engineering, and more specifically, relates to a shaft pipeline arrangement device and an arrangement method. Background Art

[0002] Underground mine backfill pipes are typically arranged using drilled holes. However, due to deviations during construction, the actual borehole location underground often deviates significantly from the designed location. Deep mine backfill boreholes are deep, and to prevent adjacent backfill boreholes from intersecting, the spacing between adjacent boreholes must be increased based on the borehole's deviation rate. This often requires extensive tunneling underground to locate the boreholes. Furthermore, large borehole deviations lead to significant wear and tear on the backfill pipes, shortening their service life. Large-scale mines employing backfill mining often require the construction of multiple backfill boreholes, requiring a significant surface area and directly impacting the layout of the backfill mixing plant.

[0003] Traditional drainage pipes in underground mines are often located in auxiliary shafts or cable shafts. In high-volume mines, multiple large-diameter pipes are often required, which takes up significant shaft space, increases construction costs, and compromises ventilation. Drainage pipes installed in auxiliary shafts used for transporting personnel also pose safety risks, and the limited space makes subsequent maintenance difficult. Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a wellbore pipeline layout device and layout method to solve the current problems in the existing technology, such as the large number of filling boreholes occupying a large surface area, long construction period, difficulty in finding holes underground for filling boreholes, poor ventilation of underground drilling connecting channels, and large deflection of boreholes resulting in large wear of filling pipes and short service life.

[0005] The present invention provides a wellbore pipeline arrangement device, including a pipeline fixing unit; wherein the pipeline fixing unit includes a fixing plate and a pipeline; at least two pipeline through-holes are provided on the fixing plate; one end of the pipeline is a fixed end, and the other end is a lowering end; the fixed end of the pipeline is arranged in the pipeline through-hole and fixedly connected to the pipeline through-hole through a fixing element; the pipe body of the pipeline is arranged along the inner wall of the wellbore; and a reinforcement structure is provided between the fixing elements.

[0006] In addition, a preferred solution is that the number of the pipeline fixing units is at least two; the lowered end of the pipeline of a pipeline fixing unit is connected to the fixed end of the pipeline of the next adjacent pipeline fixing unit.

[0007] In addition, a preferred solution is that the lowered end of the pipe of the pipe fixing unit is connected to the fixed end of the pipe of the next adjacent pipe fixing unit through a sleeve.

[0008] In addition, a preferred solution is that the shape of the fixed disk and the shape of the cross section of the wellbore are both circular; and the disk surface diameter of the fixed disk is smaller than the diameter of the cross section of the wellbore.

[0009] In addition, a preferred solution is that the fixing plate is a flange plate; and / or the fixing element is a pipe clamp.

[0010] In addition, a preferred solution is that the pipes are evenly arranged on the inner wall of the wellbore; and the distances between adjacent pipes are equal.

[0011] In addition, a preferred solution is that the reinforcement structure is a reinforcement steel plate; a cross arm placement groove is provided on the reinforcement steel plate; and a cross arm is provided in the cross arm placement groove.

[0012] In addition, a preferred solution is to provide anti-slip structures at both ends of the cross arm.

[0013] The present invention provides a wellbore pipeline arrangement method, which uses the wellbore pipeline arrangement device as described above to arrange pipelines in the wellbore, comprising the following steps:

[0014] S1. Pass the pipe through the pipe through-hole of the fixing plate and fix it to the pipe through-hole through a fixing element to obtain an assembled pipe fixing unit;

[0015] S2. Align and weld the pipes of the assembled pipe fixing units required for the determined number of wells according to the four-point limit method to obtain a preliminary wellbore pipe layout device;

[0016] S3. Fixing a guide device on the fixed plate at the lowest end of the preliminary wellbore pipe layout device; wherein the guide device includes a cone structure disposed at the bottom of the fixed plate, and the shape and area of ​​the bottom surface of the cone structure are the same as the shape and area of ​​the bottom surface of the fixed plate, thereby obtaining a ready-to-use wellbore pipe layout device;

[0017] S4, lowering the standby wellbore pipe layout device required by the wellbore from the wellbore mouth to the inside of the wellbore using a lifting device until the pipe reaches a preset height of the wellbore, thereby obtaining a preliminary pipe layout wellbore;

[0018] S5. Concrete slurry is poured into the upper port of the preliminary pipeline arrangement wellbore, and the lower port of the preliminary pipeline arrangement wellbore is blocked by an annular space blocking disk pre-opened at the top of the connecting channel of the wellbore to prevent the concrete slurry inside the wellbore from flowing out, thereby obtaining the pipeline arrangement wellbore after backfilling and pouring;

[0019] S6. Maintain the pipeline arrangement well after backfilling and pouring, and complete the pipeline arrangement of the well after the concrete slurry inside the well reaches a preset strength.

[0020] In addition, a preferred solution is that before lowering the standby wellbore pipe arrangement device required by the wellbore from the wellbore mouth to the inside of the wellbore by a lifting device until the pipe reaches a preset height of the wellbore to obtain a preliminary pipe arrangement wellbore, the method further includes:

[0021] A drilling rig is used to construct a wellbore to obtain a wellbore;

[0022] A test sphere is suspended by a thin steel wire rope and placed inside the wellbore to test the diameter of the wellbore.

[0023] From the above technical solution, it can be seen that the wellbore pipe layout device and layout method provided by the present invention are provided with at least two pipe through-holes through a fixed plate, and the fixed end of the pipe is arranged in the pipe through-hole and fixed to the pipe through-hole by a fixing element. Before lowering the pipe, the pipe fixing unit is first installed according to the wellbore height, and then lowered into the wellbore. It can quickly form or install multiple pipes, effectively saving site space and construction time, and facilitating production management and maintenance; avoiding wear of filling pipes due to large-scale deflected drilling holes, and extending the life of the pipes; the present invention can effectively solve the problems in the prior art such as large surface area occupied by a large number of filling boreholes, long construction period, difficulty in finding holes for filling boreholes underground, poor ventilation of underground drilling connecting channels, and large wear of filling pipes due to large-scale deflection of drilling holes, and short service life.

[0024] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all of these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By referring to the following description in conjunction with the accompanying drawings, and with a more complete understanding of the present invention, other objects and results of the present invention will become more clear and easy to understand. In the accompanying drawings:

[0026] Figure 1 Schematic diagram of the structure of a wellbore pipeline arrangement device according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the cross section in the II direction;

[0028] Figure 3 is a schematic cross-sectional view of a cross arm according to an embodiment of the present invention;

[0029] Figure 4 is a schematic cross-sectional view of another direction of a cross arm according to an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of the process of the wellbore pipeline arrangement method according to an embodiment of the present invention.

[0031] In the accompanying drawings, 1-fixing plate, 11-pipe through hole, 2-pipe, 3-fixing element, 4-wellbore, 5-reinforcement structure, 51-cross arm placement groove, 6-cross arm, 61-anti-slip structure.

[0032] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0033] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may be practiced without these specific details.

[0034] In response to the above-mentioned problems in the existing technology, such as the large number of filling boreholes occupying a large surface area, long construction period, difficulty in finding holes underground for filling boreholes, poor ventilation of underground drilling connecting channels, and large deviations of boreholes resulting in large wear of filling pipes and short service life, a wellbore pipeline layout device and layout method are proposed.

[0035] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] In order to illustrate the wellbore pipeline arrangement device provided by the present invention, Figure 1 The structure of the wellbore pipe arrangement device according to an embodiment of the present invention is shown; Figure 2 Shown Figure 1 The cross section in the II direction; Figure 3 shows a cross-arm cross-section of an embodiment of the present invention; Figure 4 Another cross-section of a cross-arm according to an embodiment of the present invention is shown.

[0037] like Figures 1 to 4 As shown together, the wellbore pipeline arrangement device provided by the present invention includes a pipeline fixing unit; wherein, the pipeline fixing unit includes a fixing plate 1 and a pipeline 2; at least two pipeline through holes 11 are provided on the fixing plate 1; one end of the pipeline 2 is a fixed end, and the other end is a lowering end, the fixed end of the pipeline 2 is arranged in the pipeline through hole 11, and is fixedly connected to the pipeline through hole 11 through a fixing element 3, and the pipe body of the pipeline 2 is arranged along the inner wall of the wellbore 4; a reinforcement structure 5 is provided between the fixing elements 3.

[0038] Wherein, pipeline 2 is a filling pipe or a drainage pipe. Of course, it can also be other pipelines that need to be arranged inside the wellbore, which is not particularly limited here.

[0039] like Figure 1As shown, taking the filling pipe as an example, according to the distribution of the filling system and the middle filling pipe, 8 φ168mm filling pipes are set, of which 3 filling pipes are used for normal filling work, and the other 5 filling pipes are spare. The spare filling pipes can be used to improve the ventilation of the filling connecting channel. The net diameter of the wellbore 4 is selected to be φ1200mm, and the 8 filling pipes are distributed in the wellbore 4. In order to facilitate the lowering of the pipeline, the fixed plate 1 needs to be processed before the pipe is lowered. The fixed plate 1 is made of 20mm thick steel plate, and 8 φ195mm holes are arranged in a row on the plate. The fixing element 3 is set in the pipe through hole 11 of the fixing plate 1, and both ends of the fixing plate 1 are exposed 65mm. The circumferences on both sides of the fixing element 3 that contact the disk surface of the fixing plate are reinforced by manual arc welding. Every two corresponding fixing elements 3 on the disk surface are connected by a reinforcement structure, and the connected parts are reinforced by welding; as shown Figure 1 There are four pairs of relatively positioned fixing elements 3, so four reinforcing structures are used to connect two relatively positioned fixing elements 3, so that the fixing plate 1, the fixing elements 3 and the reinforcing structure 5 form an integral group pipe plate.

[0040] At least two pipe through holes 11 are provided on the fixing plate 1, and the fixed end of the pipe 2 is provided in the pipe through hole 11 and fixed to the pipe through hole 11 by the fixing element 3. Before lowering the pipe, the pipe fixing unit is first installed according to the height of the wellbore, and then lowered into the wellbore 4, so that multiple pipes can be quickly formed or installed, effectively saving site space and construction time, and facilitating production management and maintenance; avoiding wear of the filling pipe due to large-scale deflected drilling holes, and extending the life of the pipe; the present invention can effectively solve the problems in the prior art such as large surface area occupied by a large number of filling boreholes, long construction period, difficulty in finding holes underground for filling boreholes, poor ventilation of underground drilling ducts, and large wear of the filling pipe due to large-scale deflection of drilling holes, and short service life.

[0041] As a preferred embodiment of the present invention, there are at least two pipe fixing units; the lowered end of the pipe 2 of a pipe fixing unit is connected to the fixed end of the pipe 2 of the next adjacent pipe fixing unit. The number of pipe fixing units required for each wellbore layer is determined based on the wellbore height. To ensure that the pipe is straight when lowered into the wellbore, at least two pipe fixing units are used. Of course, the number of pipe fixing units can be determined based on actual needs and is not particularly limited here.

[0042] As a preferred solution of the present invention, the lower end of the pipe 2 of the pipe fixing unit is connected to the fixed end of the pipe 2 of the next adjacent pipe fixing unit through a sleeve. Connecting the pipes of two adjacent pipe fixing units through a sleeve can make the connection between the pipes more convenient.

[0043] As a preferred embodiment of the present invention, the shape of the fixed plate 1 and the cross-section of the shaft 4 are both circular; moreover, the diameter of the fixed plate 1 is smaller than the cross-section diameter of the shaft 4. The cross-section of a shaft used in mining is typically circular, but other shapes are possible. The shape of the fixed plate 1 is identical to the cross-section of the shaft 4, facilitating the arrangement of the pipe 2 within the shaft 4.

[0044] As a preferred embodiment of the present invention, the fixing plate 1 is a flange; and / or the fixing element 3 is a pipe clamp. Flanges are readily available and have high strength. Pipe clamps are commonly used to fix pipes. During use, the pipe clamp is passed across the flange to secure the pipe in the pipe through-hole 11.

[0045] As a preferred embodiment of the present invention, pipes 2 are evenly arranged along the inner wall of wellbore 4; the distance between adjacent pipes is equal. Each pipe 2 is evenly arranged along the inner wall of wellbore 4, and the clearance between adjacent pipes 2 is preferably no less than 150 mm to facilitate welding between the pipes.

[0046] As a preferred embodiment of the present invention, the reinforcement structure 5 is a reinforcement steel plate, a cross arm placement groove 51 is provided on the reinforcement steel plate, and a cross arm 6 is provided in the cross arm placement groove 51. The cross arm placement groove 51 and the cross arm 6 are provided to lift the entire device.

[0047] As a preferred embodiment of the present invention, anti-slip structures 61 are provided at both ends of the cross arm 6. The anti-slip structures 61 can prevent the device from falling off during the hoisting process of the device.

[0048] Figure 5 The flowchart of the wellbore pipeline arrangement method according to an embodiment of the present invention is shown.

[0049] like Figure 5 As shown, the wellbore pipeline arrangement method provided by the present invention uses the wellbore pipeline arrangement device as described above to arrange pipelines in the wellbore, including the following steps:

[0050] S1. Pass the pipe 2 through the pipe through-hole 11 of the fixing plate 1 and fix it to the pipe through-hole 11 through the fixing element 3 to obtain an assembled pipe fixing unit;

[0051] S2. Align and weld the pipes of the assembled pipe fixing units required for the determined number of wells according to the four-point limit method to obtain a preliminary wellbore pipe layout device;

[0052] S3. Fixing a guide device on the bottommost fixed plate of the preliminary wellbore pipe arrangement device; wherein the guide device includes a cone structure provided at the bottom of the fixed plate 1, and the shape and area of ​​the bottom surface of the cone structure are the same as those of the bottom surface of the fixed plate 1, thereby obtaining a ready-to-use wellbore pipe arrangement device;

[0053] S4, lowering the standby wellbore pipe layout device required by the wellbore from the wellbore mouth to the inside of the wellbore using a lifting device until the pipe reaches the preset height of the wellbore 4, thereby obtaining a preliminary pipe layout wellbore;

[0054] S5. Concrete slurry is poured into the upper port of the preliminary pipeline layout wellbore, and the lower port of the preliminary pipeline layout wellbore is blocked by an annular space blocking plate pre-opened at the top of the wellbore's connecting channel to prevent the concrete slurry inside the wellbore from flowing out, thereby obtaining the pipeline layout wellbore after backfilling and pouring;

[0055] S6. Maintain the pipe arrangement well after backfill pouring. After the concrete slurry inside the well reaches the preset strength, complete the pipe arrangement of the well.

[0056] In step S2, the pipe grooves are butt-welded. Due to the varying ovality of the pipe grooves, alignment is difficult. Therefore, a four-point positioning method is used for alignment. The assembled pipe fixing units are connected by sleeves, and the sleeves and pipes are welded continuously. The weld height is the same as the pipe wall thickness. After welding, the transverse welds are reinforced with concentric arcs using square arc plates of equal thickness. The reinforcing square arc plates are preferably 100 mm wide and 10 mm thick. The butt welds between the reinforcing plates and the pipe openings must be perpendicular. Rust removal is required at the pipe welding locations before welding.

[0057] In step S3, the wellbore being constructed by the raise boring machine has a certain degree of deflection. A guide device can be installed at the lower end of the bottom fixed plate to facilitate the lowering of the machine. The guide device is preferably made of 8mm thick steel plate and has a cone shape. The cone base has the same diameter as the fixed plate.

[0058] In step S4, a lifting device is lifted using a crossbeam, with the lifting height being no less than the length L of each pipe section. The maximum rated total lifting capacity of the lifting device is no less than the total weight of all pipes and the fixing plate.

[0059] Before lowering the device into the wellbore, a cross-beam is installed at the wellhead of the wellbore. The cross-beam is preferably made of 40C I-steel. During the lowering of the device, the standby wellbore pipe layout device hanging on the crossarm is slowly lowered by a crane until both ends of the crossarm fall steadily on the crossarm groove of the crossbeam. The weight of the standby wellbore pipe layout device and the crossarm is evenly transferred to the concrete foundation of the wellhead through the cross-beam.

[0060] In step S5, the concrete slurry is preferably high-strength cement slurry with a strength grade not less than C40; the pouring section height is preferably 5m, and the cement slurry is waited to solidify to complete the lower port annulus plugging.

[0061] In step S6, after the concrete slurry inside the shaft reaches a preset strength, the pipeline can be put into use, and the excess pipeline is used as a ventilation hole for the connecting channel and can also be used for other purposes.

[0062] As a preferred embodiment of the present invention, before lowering the standby wellbore pipe arrangement device required by the wellbore from the wellbore mouth to the inside of the wellbore by a lifting device until the pipe reaches a preset height of the wellbore to obtain a preliminary pipe arrangement wellbore, the method further includes:

[0063] A drilling rig is used to construct a wellbore to obtain a wellbore;

[0064] The test sphere is suspended by a thin steel wire rope and placed inside the wellbore to test the diameter of the wellbore.

[0065] Specifically, in the process of using a wellbore drilling rig to construct a wellbore,

[0066] Use high-precision wellbore drilling rigs (raised well drilling rigs) for wellbore construction, including:

[0067] Before pouring the wellbore drilling rig foundation, a connecting channel is drilled from the bottom of the wellbore to the center of the wellbore;

[0068] Drill a pilot hole downward at the center of the wellbore; wherein the pilot hole is connected to the drilling channel;

[0069] Expand the hole from bottom to top along the guide hole to the pre-designed section of the wellbore;

[0070] The rock cuttings produced by drilling the pilot hole are carried out of the ground by the circulating fluid, and the rock cuttings produced by expanding the hole fall into the drilling channel by their own weight and are transported out by a loader or other loading equipment.

[0071] The test sphere is suspended by a thin steel wire rope and placed inside the wellbore to test the wellbore diameter. Specifically:

[0072] In the wellbore, a hard plastic pipe with a diameter of 30mm±5mm is braided into a sphere with a diameter of φ1m±0.05m, which is suspended into the wellbore by a thin steel wire rope for aperture testing.

[0073] It can be seen from the above specific embodiments that the wellbore pipe layout device and layout method provided by the present invention are provided with at least two pipe through-holes through a fixed plate, and the fixed end of the pipe is arranged in the pipe through-hole and fixed to the pipe through-hole by a fixing element. Before lowering the pipe, the pipe fixing unit is first installed according to the wellbore height, and then lowered into the wellbore, which can quickly form or install multiple pipes, effectively saving site space and construction time, and facilitating production management and maintenance; avoiding wear of the filling pipe due to large drilling deviation, and extending the life of the pipe; the present invention can effectively solve the problems in the prior art such as large surface area occupied by a large number of filling boreholes, long construction period, difficulty in finding holes for filling boreholes underground, poor ventilation of underground drilling connecting channels, and large wear of the filling pipe due to large drilling deviation, and short service life.

[0074] The wellbore piping arrangement device and method according to the present invention have been described above by way of example with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications may be made to the wellbore piping arrangement device and method without departing from the scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A wellbore pipe arrangement device, characterized in that: Comprising a pipeline fixing unit; wherein, The pipeline fixing unit includes a fixing plate and a pipeline; At least two pipeline through holes are provided on the fixing plate; One end of the pipe is a fixed end, and the other end is a lowered end. The fixed end of the pipe is disposed in the pipe through-hole and fixedly connected to the pipe through-hole via a fixing element. The pipe body of the pipe is disposed along the inner wall of the wellbore. There are at least two pipe fixing units. The lowered end of the pipe of a pipe fixing unit is connected to the fixed end of the pipe of the next adjacent pipe fixing unit. A reinforcement structure is provided between the fixing elements; The reinforcing structure is a reinforcing steel plate; a cross arm placement groove is provided on the reinforcing steel plate; a cross arm is provided in the cross arm placement groove; and anti-slip structures are provided at both ends of the cross arm.

2. The wellbore pipe arrangement device according to claim 1, characterized in that: The lowered end of the pipe of the pipe fixing unit is connected to the fixed end of the pipe of the next adjacent pipe fixing unit through a sleeve.

3. The wellbore pipe arrangement device according to claim 1, characterized in that: The shape of the fixing plate and the cross-section of the shaft are both circular; and, The diameter of the fixed disk is smaller than the diameter of the cross section of the wellbore.

4. The wellbore pipe arrangement device according to claim 1, characterized in that: The fixing plate is a flange; and / or, The fixing element is a pipe clamp.

5. The wellbore pipe arrangement device according to claim 1, characterized in that: The pipes are evenly arranged on the inner wall of the wellbore; The distances between adjacent pipes are equal.

6. A method for arranging a wellbore pipeline, characterized in that: Arranging pipelines in a wellbore using the wellbore pipeline arrangement device according to any one of claims 1 to 5 comprises the following steps: S1. Pass the pipe through the pipe through-hole of the fixing plate and fix it to the pipe through-hole through a fixing element to obtain an assembled pipe fixing unit; S2. Align and weld the pipes of the assembled pipe fixing units required for the determined number of wells according to the four-point limit method to obtain a preliminary wellbore pipe layout device; S3. Fixing a guide device on the fixed plate at the lowest end of the preliminary wellbore pipe layout device; wherein the guide device includes a cone structure disposed at the bottom of the fixed plate, and the shape and area of ​​the bottom surface of the cone structure are the same as the shape and area of ​​the bottom surface of the fixed plate, thereby obtaining a ready-to-use wellbore pipe layout device; S4, lowering the standby wellbore pipe layout device required by the wellbore from the wellbore mouth to the inside of the wellbore using a lifting device until the pipe reaches a preset height of the wellbore, thereby obtaining a preliminary pipe layout wellbore; S5. Concrete slurry is poured into the upper port of the preliminary pipeline arrangement wellbore, and the lower port of the preliminary pipeline arrangement wellbore is blocked by an annular space blocking disk pre-opened at the top of the connecting channel of the wellbore to prevent the concrete slurry inside the wellbore from flowing out, thereby obtaining the pipeline arrangement wellbore after backfilling and pouring; S6. Maintain the pipeline arrangement well after backfilling and pouring, and complete the pipeline arrangement of the well after the concrete slurry inside the well reaches a preset strength.

7. The wellbore pipeline arrangement method according to claim 6, characterized in that: Before lowering the standby wellbore pipe arrangement device required by the wellbore from the wellbore opening to the inside of the wellbore by a lifting device until the pipe reaches a preset height of the wellbore to obtain a preliminary pipe arrangement wellbore, the method further includes: A drilling rig is used to construct a wellbore to obtain a wellbore; A test sphere is suspended by a thin steel wire rope and placed inside the wellbore to test the diameter of the wellbore.

Images