Tensile composite pipe for vertical shaft and matched pipe placing auxiliary device

Abstract

According to the tensile composite pipe for the vertical shaft and the matched pipe placing auxiliary device, the design principle of performance complementation is adopted, the layered design of the lining layer, the reinforcing layer, the optimized tensile layer and the outer protection layer is adopted to form the tensile composite pipe which is high in performance, resistant to abrasion, resistant to corrosion, capable of bearing pressure and resistant to tension, the pipeline investment cost is greatly reduced, and the production efficiency is improved. Meanwhile, the later maintenance cost caused by frequent pipeline replacement is reduced; by designing a matched pipe placing auxiliary device used for placing the tensile composite pipe in the vertical shaft and fixedly installing the tensile composite pipe, the problems that the construction period is long and the pipe placing process is complex due to the fact that a hanging scaffold is used for carrying and placing the pipe repeatedly in a reciprocating mode are solved, repeated reciprocating carrying of the hanging scaffold is not needed, the hoisting and fixing process is simplified, the construction period is remarkably shortened, and the construction efficiency is improved. The installation stability is high, deviation accumulation during long-distance arrangement of the pipelines is reduced, the risk that the pipelines deviate from the preset position is reduced, and the later adjustment workload is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil and gas medium conveying, and particularly relates to a tension-resistant composite pipe for a vertical shaft and a matching pipe placing auxiliary device. BACKGROUND

[0002] As the best carrier for medium transmission, a pipeline system plays an important role in conveying under various working conditions. With the development of oil and gas exploitation, underground energy storage, and deep geological exploration engineering, it is inevitable to place various functional pipelines in a vertical shaft that can reach hundreds of meters or even thousands of meters in depth. In addition to water supply, power supply, and ventilation pipelines for daily life, many work pipelines also need to be installed, and the selection and installation of such work pipelines are often very difficult.

[0003] The work pipeline in the vertical shaft has high reliability requirements, especially for the pressure-bearing capacity and corrosion resistance of the pipeline. For most mining enterprises, the work pipeline often needs to meet the requirements of wear resistance, corrosion resistance, pressure-bearing capacity, and installation convenience. However, due to the limitations of existing technologies, only the requirements can be reduced, and most enterprises can only use steel pipelines to meet the most basic pressure-bearing transportation capacity to have production capacity, and then compensate for the requirements of wear resistance and corrosion resistance by frequently replacing the pipeline, which is a defect in the pipeline system. If the conveying medium has very high requirements for the wear resistance and corrosion resistance of the pipeline, only high-performance steel pipelines such as stainless steel pipes, bimetallic steel pipes, and even duplex stainless steel pipes or titanium steel pipes can be used, which is a huge investment for the initial mining investment of the enterprise. The shortcomings of traditional technologies not only exist in the performance of the pipeline itself but also exist in the construction and installation. The length of a single traditional metal pipeline is usually 6m or 12m, and the length of 6m is more common for easy installation. The steel pipeline needs to be installed with a dedicated hoisting device due to its heavy weight. Many enterprises will install a hoist platform inside the vertical shaft, place several fixed-length steel pipes on the hoist platform each time, run the hoist platform to the specified point, install and fix the steel pipes, return the hoist platform to the ground, transport the steel pipes again, and install them in the vertical shaft again. The construction period during this period is extremely long. The flange for joint connection at the end of the steel pipeline is limited by the welding process and cannot be guaranteed to be completely perpendicular to the axial direction of the pipeline. For the internal vertical shaft, the arrangement position of the pipeline has high requirements. The arrangement of long-distance rigid pipelines may gradually increase the deviation due to the contact problem of the flange connection surface, eventually causing the pipeline to deviate from the preset position, and it is difficult to adjust in the later period. Therefore, it is necessary to improve the above problems. SUMMARY

[0004] The technical problems solved by the present application are to provide a vertical shaft tensile composite pipe and a matching pipe laying auxiliary device, adopt a complementary design principle, adopt a high-performance wear-resistant, corrosion-resistant, pressure-resistant and tensile-resistant tensile composite pipe formed by a layered design including an inner lining layer, a reinforcing layer, an optimized tensile layer and an outer protective layer, greatly reduce the pipeline investment cost, and at the same time reduce the later maintenance cost caused by frequent replacement of the pipeline; and through the design of the matching pipe laying auxiliary device for fixing and installing the tensile composite pipe in the vertical shaft, the problems of long construction period and complex pipe laying process caused by the hoist plate multiple back-and-forth carrying pipe laying mode are solved, the hoist plate multiple back-and-forth carrying is not needed, the hoisting and fixing process is simplified, the construction period is significantly shortened, the installation stability is high, the deviation accumulation of the long-distance arrangement of the pipeline is maximally reduced, the risk of deviation of the pipeline from the preset position is reduced, and the later adjustment workload is reduced.

[0005] The technical scheme adopted by the present application is that the vertical shaft tensile composite pipe comprises an inner lining layer, a reinforcing layer, a tensile layer and an outer protective layer arranged from inside to outside, the reinforcing layer is tightly wound on the outer wall of the inner lining layer in a multi-layer cross manner along the axis direction of the inner lining layer, the tensile layer is used to provide axial tensile strength to the vertically hoisted pipe body, the tensile layer is tightly wound on the outer wall of the reinforcing layer in a multi-layer variable-angle manner, and the winding angles of adjacent two layers are symmetrically distributed in the range of 10°-65°, and the outer protective layer is wrapped and fixed outside the tensile layer.

[0006] Among them, the inner lining layer adopts any one of HDPE, PERT, PA, PVDF, PEX and UHMWPE, and the outer protective layer adopts any one of HDPE, PERT, PA, PVDF, PEX, UHMWPE and double-anti-polyethylene material.

[0007] Further, the reinforcing layer adopts one of polyester pre-impregnated tape, aramid pre-impregnated tape, steel cord pre-impregnated tape or carbon fiber pre-impregnated tape, and the number of winding layers of the reinforcing layer is determined according to the pressure requirement.

[0008] Further, the length of the tensile layer from the wellhead or the starting end of the pipe body to the well bottom or the end of the pipe body is L, and the tensile layer is divided into a tensile section of 0-0.2L, a tensile and pressure section of 0.2L-0.8L and a pressure section of 0.8L-L from the wellhead or the starting end of the pipe body to the well bottom or the end of the pipe body, the winding angles of adjacent two layers of the tensile section are symmetrically distributed in the range of 10°-25°, the winding angles of adjacent two layers of the tensile and pressure section are symmetrically distributed in the range of 25°-45°, and the winding angles of adjacent two layers of the pressure section are symmetrically distributed in the range of 45°-65°.

[0009] Further, the tensile layer adopts a high-strength pre-impregnated tape made of steel strips or a plurality of materials.

[0010] Further, the inner lining layer is also provided with a wear-resistant layer for contacting the medium in the pipe body, the wear-resistant layer adopts a modified thermoplastic elastomer material, and the inner lining layer and the wear-resistant layer are extruded by a co-extrusion process.

[0011] The anti-tension composite pipe supporting and placing auxiliary device for shaft comprises a sleeve, a pressing plate and a clamping plate, a non-slip groove one is formed on the sleeve, an anti-tension composite pipe which is adapted to the non-slip groove one and penetrates through the non-slip groove one is fixedly connected with the sleeve through the clamping plate which is buckled in the lateral slot position of the non-slip groove one and can be detachably fixed on the sleeve, and the outer protective layer on the anti-tension composite pipe is tightly embedded in the non-slip groove one and the clamping plate to achieve non-slip, a non-slip groove two is formed on the other side wall of the sleeve, and a steel wire rope which is adapted to the non-slip groove two and penetrates through the non-slip groove two is fixed on the sleeve through the pressing plate which is buckled in the lateral slot position of the non-slip groove two and can be detachably fixed on the sleeve; when the anti-tension composite pipe is lowered into place in the shaft, the sleeve is fixed on the shaft wall or the beam in the shaft to complete the fixation of the anti-tension composite pipe in the shaft.

[0012] Further, the non-slip groove one is a U-shaped groove which is formed on the right side wall of the sleeve and penetrates through the upper end face and the lower end face of the sleeve, the non-slip groove two is an arc-shaped groove which is adapted to the steel wire rope, and the semicircular groove face of the non-slip groove one is provided with two ladder-shaped non-slip clamping grooves which respectively extend to the corresponding vertical groove face, and the arc-shaped groove face of the non-slip groove two is also provided with a ladder-shaped non-slip clamping groove.

[0013] Further, the clamping plate is a cross-shaped plate structure which is adapted to the non-slip groove one in the middle and is adapted to the mounting groove on the right side wall of the sleeve at both ends, the arc-shaped groove wall of the clamping plate towards the non-slip groove one is also provided with a ladder-shaped non-slip clamping groove, and the clamping plate is fixed on the right side of the sleeve through the fastening bolt one which is adaptedly connected through the through hole on the plate face at both ends and the threaded hole on the groove side wall of the mounting groove. The side wall of the pressing plate towards the non-slip groove two is also provided with the non-slip groove two with a ladder-shaped non-slip clamping groove on the groove wall, and the pressing plate is fixedly connected with the sleeve through the locking bolt two which is adaptedly connected through the through hole of the four corners and the threaded hole on the corresponding position of the left side wall of the sleeve.

[0014] Further, the sleeve left side wall is provided with bolt holes which penetrate through to the right side wall at the four corner positions, and the anti-tension composite pipe lowered into place in the shaft is fixedly installed on the shaft wall or the beam in the shaft by the high-strength bolt which is adapted to the four corner bolt holes of the sleeve on the premise that the fastening bolt one for connecting the sleeve and the clamping plate is removed, so that the anti-tension composite pipe is fixedly installed in the shaft.

[0015] Compared with the prior art, the present application has the following advantages: 1. This technical solution adopts the design principle of complementary performance, and uses a layered design including an inner lining layer, a reinforcing layer, an optimized tensile layer and an outer protective layer to form a high-performance wear-resistant, corrosion-resistant, pressure-bearing and tensile-resistant composite pipe. This significantly reduces pipeline investment costs and reduces the later maintenance costs caused by frequent pipeline replacements. The tensile composite pipe has a stable structure and superior performance. The structural layers are bonded together as a whole, and the tensile layer fully bears the axial load inside and outside the pipeline, avoiding delamination and collapse after the pipeline is subjected to excessive axial load, thus enhancing reliability. 2. Based on the characteristics of use in vertical pipe shafts, this technical solution designs and optimizes the tensile layer by using a variable-angle winding method to maximize the axial tensile strength of the material, preventing the pipe from being torn apart during vertical hoisting and installation. It has high tensile strength and more stable performance, meeting the tensile requirements in vertical shafts while making the pipe lighter, reducing raw material consumption, lowering costs, and increasing market economic benefits. 3. This technical solution solves the problems of long construction cycle and complicated pipe laying process caused by the method of multiple round trips of lifting and moving pipes in the vertical shaft by designing a matching pipe laying auxiliary device for laying and fixing tensile composite pipes in the vertical shaft. It eliminates the need for multiple round trips of lifting and moving pipes, simplifies the lifting and fixing process, significantly shortens the construction period, has high installation stability, minimizes the accumulation of deviations when the pipeline is laid over a long distance, reduces the risk of the pipeline deviating from the preset position, and reduces the amount of adjustment work in the later stage. 4. Based on the requirements of the medium for the wear resistance of the pipeline, this technical solution takes into account the performance advantages of the tensile composite pipe for vertical shafts, and at the same time, by setting a wear-resistant layer integrally formed with the inner lining through a co-extrusion process, it has good wear resistance, which can meet the needs of different fields and expand the scope of application. 5. The tensile composite pipe of this technical solution has a certain degree of flexibility, which can be supplied in coils, so that the length of a single tensile composite pipe can reach hundreds of meters, greatly reducing the number of pipe joints, increasing pipeline installation efficiency, and eliminating the need for repeated back-and-forth transportation of pipes as in traditional technology. This also results in higher construction efficiency for a single pipe and significantly reduced installation costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the tensile composite pipe structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the tensile composite pipe of the present invention being lowered using a pipe-laying auxiliary device; Figure 3 This is a schematic diagram of the structure of the tensile composite pipe of the present invention when it is lowered into place in a vertical shaft and fixed to the shaft wall or the crossbeam (not shown) inside the shaft; Figure 4 This is a schematic diagram of the three-dimensional structure of the card sleeve of the present invention. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with Figures 1-3 It should be noted that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0018] It should be noted that, in this document, unless otherwise specified, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0019] In this document, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations. The element defined by the statement "includes a..." does not exclude the presence of another identical element in the process, method, article or device that includes the element.

[0020] The anti-tension composite pipe for shaft, such as Figure 1 As shown, the anti-tension composite pipe 8 includes an inner liner 1, a reinforcing layer 2, an anti-tension layer 3 and an outer protective layer 4 arranged from inside to outside, the reinforcing layer 2 is tightly wound on the outer wall of the inner liner 1 in the axial direction of the inner liner 1 in a multi-layer cross manner, as shown Figure 1 As shown, the reinforcing layer 2 is even layers, the anti-tension layer 3 is used to provide axial tensile strength to the pipe body hoisted vertically, and the anti-tension layer 3 is tightly wound on the outer wall of the reinforcing layer 2 in a variable angle manner with the winding angle of adjacent two layers symmetrically distributed in the range of 10°-65°, and the outer protective layer 4 is wrapped and fixed outside the anti-tension layer 3.

[0021] The inner liner 1 is mainly used for transmitting medium, plays a role of contacting with medium and sealing internal medium, is made of any one of HDPE, PERT, PA, PVDF, PEX and UHMWPE, and for acidic medium, the inner liner 1 made of non-metal material can effectively avoid internal medium from being corroded by the pipeline; The outer protective layer 4 is generally made of any one of HDPE, PERT, PA, PVDF, PEX, UHMWPE and other thermoplastic resins, is mainly used for protecting the pipe body, avoiding the anti-tension composite pipe 8 from being affected by knocking and rubbing during transportation and installation, and if there is a demand for flame-retardant and anti-static anti-tension composite pipe 8, a double anti-polyethylene material (i.e. polyethylene with flame-retardant and anti-static functions, commonly known as double anti-polyethylene material) can also be used to meet the use demand; The number of winding layers of the reinforcing layer 2 is generally determined according to the pressure bearing requirement, the reinforcing layer 2 can be made of polyester pre-impregnated tape, aramid pre-impregnated tape, steel cord pre-impregnated tape or carbon fiber pre-impregnated tape, and this layer is mainly used for pressure bearing, and the reinforcing layer 2 formed in a multi-layer cross mode has high pressure bearing capacity and high reliability; The anti-tension layer 3 is mainly used for providing axial tensile strength to the pipe body, avoiding the pipe body from being torn when being vertically hoisted and installed, and the anti-tension layer 3 is made of steel belt or high-strength pre-impregnated tape composed of multiple materials; wherein the high-strength pre-impregnated tape composed of multiple materials is a pre-impregnated tape made of steel cord, steel wire rope, aramid fiber, carbon fiber and other materials with high tensile strength and PE material through a plastic process, and the pre-impregnated tape has higher tensile strength and more stable performance, and is more stable and reliable in the application of vertical shaft working conditions. The material of the anti-tension layer 3 is mainly high-strength pre-impregnated tape, and some materials such as steel belt that cannot be made into pre-impregnated tape are also used. The anti-tension layer 3 in the form of pre-impregnated tape is bonded to an adjacent structural layer as a whole after fusion, and the material such as steel belt that cannot be made into pre-impregnated tape is also bonded to other structural layers through a gluing process in the subsequent production process. After the anti-tension layer 3 and other structural layers are bonded as a whole by using the bonding process, the layers will not be delaminated, and the integrated structure can make the anti-tension layer 3 completely bear the load of the internal medium of the anti-tension composite pipe 8 during transmission, and will not be delaminated and collapsed.

[0022] The anti-tension layer 3 is the most critical structural layer of the downhole anti-tension composite pipe 8, and the winding of the anti-tension layer 3 adopts a variable-angle winding mode to maximize the axial anti-tension effect of the material. When a pipe vertically runs, the internal load will change in stages. Starting from the wellhead or the beginning of the pipe, the first section (anti-tension section) bears a larger load, mainly the axial tensile load. At this time, a stronger axial anti-tension strength is needed to offset it. Therefore, the winding angle of the anti-tension layer 3 in the anti-tension section needs to be smaller to provide a larger axial anti-tension strength. After reaching the middle section of the pipe (anti-tension and pressure-bearing section), the axial tensile load gradually decreases, and the radial pressure gradually increases. Therefore, this section of the pipe needs to balance the axial anti-tension strength and the radial pressure-bearing strength, and the winding angle needs to be appropriately increased. In the last section of the pipe (pressure-bearing section), the radial pressure borne by the pipe is larger, and the axial tension is very small. Therefore, this section needs to provide additional pressure-bearing strength, and a larger-angle winding mode is adopted. Therefore, according to the distribution stages of the pipe in the shaft, the winding angle is specifically as follows: the length of the anti-tension layer 3 from the wellhead or the beginning of the pipe body to the bottom of the shaft or the end of the pipe body is L, and the anti-tension layer 3 is divided into an anti-tension section from 0 to 0.2L, an anti-tension and pressure-bearing section from 0.2L to 0.8L, and a pressure-bearing section from 0.8L to L. The winding angles of the adjacent two layers of the anti-tension section are symmetrically distributed in the range of 10° to 25°, the winding angles of the adjacent two layers of the anti-tension and pressure-bearing section are symmetrically distributed in the range of 25° to 45°, and the winding angles of the adjacent two layers of the pressure-bearing section are symmetrically distributed in the range of 45° to 65°. The variable-angle winding mode can achieve the requirements with a more optimal technical solution, the pipe is more lightweight, the raw material consumption is reduced, the cost is reduced, and the market economic benefits are higher. The modified thermoplastic elastomer material is POE or TPU. As shown in Figure 1 The anti-tension layer 3 is provided with two layers of closely wound layers in a variable-angle mode. Taking the anti-tension section as an example, the winding angle of the previous layer is 10° to 25°, and the winding angle of the next layer is -10° to -25°. The angle changes of the other two sections are the same as those of the anti-tension section.

[0023] Some mining enterprises have certain requirements for the wear resistance of the pipe. Therefore, the inner lining layer 1 is further provided with a wear-resistant layer for contacting the medium in the pipe body. The wear-resistant layer adopts a modified thermoplastic elastomer material, and the inner lining layer 1 and the wear-resistant layer are extruded by a co-extrusion process. Under the consideration of the physicochemical performance advantages of the anti-tension composite pipe for shafts, the wear-resistant layer has good wear resistance and a wider application field.

[0024] The anti-tension composite pipe disclosed by the technical scheme adopts a complementary design principle, adopts a layered design of an inner lining layer 1, a reinforcing layer 2, an optimized anti-tension layer 3 and an outer protective layer 4 to form a high-performance anti-tension composite pipe 8 with wear resistance, corrosion resistance, pressure bearing and tension resistance, greatly reducing the pipeline investment cost and reducing the subsequent maintenance cost caused by frequent replacement of the pipeline; the anti-tension composite pipe 8 has stable structure layers and superior performance, and is integrally connected between the structure layers, the anti-tension layer 3 completely bears the axial load inside and outside the pipeline, avoids the phenomenon of delamination and collapse of the pipeline after the pipeline bears excessive axial load, and has higher reliability; according to the use characteristics in the pipeline shaft, the anti-tension layer 3 is designed and optimized in a variable-angle winding form to maximize the axial tension effect of the material, avoid the pipe body from being torn during vertical hoisting and installation, have high anti-tension strength, more stable performance, meet the anti-tension use requirements in the shaft, make the pipeline more lightweight, reduce the raw material consumption, reduce the cost, and have higher market economic benefits; wherein, according to the requirement of the medium on the wear resistance of the pipeline, the wear-resistant layer is integrally formed with the inner lining layer 1 through a co-extrusion process to have good wear resistance, meet the use requirements in different fields, and expand the application range; the anti-tension composite pipe itself has a certain flexibility, can be coiled for delivery, the single length of the anti-tension composite pipe 8 can reach hundreds of meters, the number of pipeline joints is greatly reduced, the pipeline installation efficiency is higher, and the pipeline does not need to be repeatedly transported back and forth as in the traditional technology, the single pipeline construction efficiency is higher, and the installation cost is greatly reduced.

[0025] The anti-tension composite pipe for the shaft is matched with a pipe placing auxiliary device, as shown in the figure, which comprises a clamping sleeve 5, a pressing plate 6 and a clamping plate 7. Figures 2-4 The anti-tension composite pipe 8 is fixedly connected with the clamping sleeve 5 through the clamping plate 7 and the clamping sleeve 5 is fixed on the well wall or the horizontal beam in the well when the anti-tension composite pipe 8 is placed in the shaft, and the fixation of the anti-tension composite pipe 8 in the shaft is completed.

[0026] As shown in the figure, the anti-tension composite pipe 8 is integrally connected with the clamping sleeve 5 through the clamping plate 7, and the clamping sleeve 5 is fixed on the well wall or the horizontal beam in the well when the anti-tension composite pipe 8 is placed in the shaft, and the fixation of the anti-tension composite pipe 8 in the shaft is completed. Figure 4As shown, the anti-skid groove one 9 is a U-shaped groove provided on the right side wall of the sleeve 5, and the anti-skid groove two 10 is an arc-shaped groove matched with the steel wire rope 11. The semicircular groove surface of the anti-skid groove one 9 is provided with two stepped anti-skid clamping grooves respectively extending to the corresponding vertical groove surface on the side, and the arc-shaped groove surface of the anti-skid groove two 10 is also provided with a stepped anti-skid clamping groove, which can increase the friction and prevent the steel wire rope 11 or the tensile composite pipe 8 from slipping off.

[0027] The connecting structure of the clamping plate 7 and the sleeve 5 is as follows: the clamping plate 7 is a cross-shaped plate structure, the middle part of which is matched with the anti-skid groove one 9, and the two ends of which are matched with the mounting grooves 13 on the right side wall of the sleeve 5. The arc-shaped groove wall of the clamping plate 7 towards the anti-skid groove one 9 is also provided with a stepped anti-skid clamping groove 12. The clamping plate 7 is fixed to the right side of the sleeve 5 by the fastening bolt one 14 matched and connected with the threaded holes on the groove side wall of the mounting groove 13 through the through holes on the two end plate surfaces. After the clamping plate 7 is fixed on the sleeve 5 to clamp and fix the tensile composite pipe 8, the outer wall of the clamping plate 7 cannot be retracted into the anti-skid groove one 9. Therefore, after the sleeve 5 is fixed with the shaft wall or the in-shaft beam, the clamping plate 7 can be in contact with the shaft wall or the in-shaft beam, so that the tensile composite pipe 8 can be reliably clamped and fixed without the fastening bolt one 14. The connecting structure of the clamping plate 7 and the sleeve 5 is as follows: the clamping plate 7 is a cross-shaped plate structure, the middle part of which is matched with the anti-skid groove one 9, and the two ends of which are matched with the mounting grooves 13 on the right side wall of the sleeve 5. The arc-shaped groove wall of the clamping plate 7 towards the anti-skid groove one 9 is also provided with a stepped anti-skid clamping groove 12. The clamping plate 7 is fixed to the right side of the sleeve 5 by the fastening bolt one 14 matched and connected with the threaded holes on the groove side wall of the mounting groove 13 through the through holes on the two end plate surfaces. After the clamping plate 7 is fixed on the sleeve 5 to clamp and fix the tensile composite pipe 8, the outer wall of the clamping plate 7 cannot be retracted into the anti-skid groove one 9. Therefore, after the sleeve 5 is fixed with the shaft wall or the in-shaft beam, the clamping plate 7 can be in contact with the shaft wall or the in-shaft beam, so that the tensile composite pipe 8 can be reliably clamped and fixed without the fastening bolt one 14.

[0028] The connecting structure of the clamping plate 7 and the sleeve 5 is as follows: the clamping plate 7 is a cross-shaped plate structure, the middle part of which is matched with the anti-skid groove one 9, and the two ends of which are matched with the mounting grooves 13 on the right side wall of the sleeve 5. The arc-shaped groove wall of the clamping plate 7 towards the anti-skid groove one 9 is also provided with a stepped anti-skid clamping groove 12. The clamping plate 7 is fixed to the right side of the sleeve 5 by the fastening bolt one 14 matched and connected with the threaded holes on the groove side wall of the mounting groove 13 through the through holes on the two end plate surfaces. After the clamping plate 7 is fixed on the sleeve 5 to clamp and fix the tensile composite pipe 8, the outer wall of the clamping plate 7 cannot be retracted into the anti-skid groove one 9. Therefore, after the sleeve 5 is fixed with the shaft wall or the in-shaft beam, the clamping plate 7 can be in contact with the shaft wall or the in-shaft beam, so that the tensile composite pipe 8 can be reliably clamped and fixed without the fastening bolt one 14.

[0029] When the tensile composite pipe auxiliary device for vertical shaft is used, the power equipment is mainly used for dragging the pipeline during the pipeline lowering and installation process to prevent the pipeline from slipping off. The equipment can select a winch. The winch is very mature and is applied to multiple industries. The power equipment of the auxiliary pipe laying device can select a winch. The winch is matched with a steel wire rope. The steel wire rope is fixed on the upper tensile composite pipe auxiliary device for vertical shaft connected with the pipeline. The winch is started to release the rope, and the tensile composite pipe 8 is lowered at the same time.

[0030] The auxiliary device is mainly a traction machine for conveying the tensile composite pipe 8 and reducing the use of manpower. The traction machine is currently a very mature product, and is selected as the auxiliary conveying device for the composite pipe, and the adaptability is also very strong.

[0031] During installation, the sleeve 5 and the tensile composite pipe 8 are matched with the clamping plate 7, the tensile composite pipe 8 is clamped between the sleeve 5 and the clamping plate 7, the fastening bolt 14 is tightened, the internal stepped anti-skid clamping groove 12 is tightly clamped on the outer protective layer 4 of the tensile composite pipe 8, the outer protective layer 4 of the tensile composite pipe 8 allows indentation at this stage, the indentation is embedded in the stepped anti-skid clamping groove 12 of the auxiliary device, and relative displacement of the tensile composite pipe and the sleeve 5 is ensured not to occur.

[0032] After the tensile composite pipe 8 is installed and fixed, the pressing plate 6 and the steel wire rope 11 are matched according to the same principle, the steel wire rope 11 is tightly clamped and fixed on the sleeve 5, and the preparation of the sleeve 5 and the tensile composite pipe 8 before being lowered into the well is completed.

[0033] The traction machine is used with the winch to slowly release the pipe, and a set of the pipe releasing auxiliary device is installed on the tensile composite pipe 8 at a certain interval during the gradual release of the pipeline. During the installation process of the sleeve 5, the construction personnel are always on the ground, which greatly reduces the probability of accidents. When the pipeline is lowered to the preset position in the shaft, the winch and the traction machine are braked. Figure 3 In this way, the fastening bolt 14 on the clamping plate 7 is first removed, high-strength bolts 16 are used through the bolt holes reserved on the sleeve 5, the sleeve 5 is installed on the shaft wall or the beam in the well, the clamping plate 7 is pressed tightly as the high-strength bolts 16 are gradually tightened, the tensile composite pipe 8 is clamped and fixed, and finally the installation is realized.

[0034] According to the above form, the clamping plate 7 is removed one by one and the sleeve 5 is installed and fastened on the shaft wall or the beam, the installation of the entire pipeline is realized, and finally the pressing plate 6 can be removed. The installation process is efficient and the use of manpower is greatly reduced, which maximally reduces the deviation accumulation when the pipeline is arranged for a long distance and reduces the risk of deviation of the pipeline from the preset position.

[0035] The technical scheme solves the problems of long construction period and complex pipe releasing process caused by the repeated lifting and transporting of the pipe by the lifting platform, does not need to rely on the repeated lifting and transporting of the pipe by the lifting platform, simplifies the lifting and fixing process, significantly shortens the construction period, has high installation stability, maximally reduces the deviation accumulation when the pipeline is arranged for a long distance, reduces the risk of deviation of the pipeline from the preset position, and reduces the workload of the later adjustment.

[0036] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0037] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A tensile composite pipe for vertical shafts, characterized in that: The structure includes an inner lining (1), a reinforcing layer (2), a tensile layer (3), and an outer protective layer (4) arranged from the inside out. The reinforcing layer (2) is tightly wound around the outer wall of the inner lining (1) in a multi-layer cross manner along the axial direction of the inner lining (1). The tensile layer (3) is used to provide axial tensile strength for the vertically hoisted pipe body. The tensile layer (3) is symmetrically distributed between adjacent layers with winding angles in the range of 10° to 65° and is tightly wound around the outer wall of the reinforcing layer (2) in a multi-layer variable angle manner. The outer protective layer (4) is wrapped and fixed to the outside of the tensile layer (3). The inner wall of the tensile layer (3) and the outer wall of the reinforcing layer (2), and the outer wall of the tensile layer (3) and the inner wall of the outer protective layer (4) are all bonded and fixed together as a whole.

2. The tensile composite pipe for vertical shafts according to claim 1, characterized in that: The inner lining layer (1) is made of any one of HDPE, PERT, PA, PVDF, PEX, and UHMWPE, and the outer protective layer (4) is made of any one of HDPE, PERT, PA, PVDF, PEX, UHMWPE, and double-resistant polyethylene material.

3. The tensile composite pipe for vertical shafts according to claim 1, characterized in that: The reinforcing layer (2) is made of one of polyester prepreg tape, aramid prepreg tape, steel cord prepreg tape or carbon fiber prepreg tape, and the number of winding layers of the reinforcing layer (2) is determined according to the pressure requirements.

4. The tensile composite pipe for vertical shafts according to claim 1, characterized in that: The tensile layer (3) has a length of L from the wellhead or the beginning of the pipe to the bottom of the well or the end of the pipe. The tensile layer (3) is divided into the following sections from the wellhead or the beginning of the pipe to the bottom of the well or the end of the pipe: a tensile section of 0 to 0.2L, a tensile and pressure-bearing section of 0.2L to 0.8L, and a pressure-bearing section of 0.8L to L. The winding angles of two adjacent layers of the tensile section are symmetrically distributed in the range of 10° to 25°. The winding angles of two adjacent layers of the tensile and pressure-bearing section are symmetrically distributed in the range of 25° to 45°. The winding angles of two adjacent layers of the pressure-bearing section are symmetrically distributed in the range of 45° to 65°.

5. The tensile composite pipe for vertical shafts according to claim 1, characterized in that: The tensile layer (3) is a high-strength prepreg made of steel strip or a composite of multiple materials.

6. The tensile composite pipe for vertical shafts according to claim 1, characterized in that: The inner lining (1) is also provided with a wear-resistant layer for contacting the medium inside the pipe. The wear-resistant layer is made of modified thermoplastic elastomer material, and the inner lining (1) and the wear-resistant layer are extruded by co-extrusion process.

7. A pipe-laying auxiliary device for vertical shaft tensile composite pipe, wherein the pipe-laying auxiliary device is used for vertical shaft tensile composite pipe as described in any one of claims 1-6, characterized in that: The device includes a sleeve (5), a pressure plate (6), and a clamping plate (7). The sleeve (5) has an anti-slip groove (9), and a tensile composite tube (8) that is adapted to and passes through the anti-slip groove (9) is fixedly connected to the sleeve (5) by the clamping plate (7) which is fastened to the side opening of the anti-slip groove (9) and is detachably fixed to the sleeve (5). The anti-slip effect is achieved by the outer protective layer (4) on the tensile composite tube (8) being tightly fitted with the anti-slip groove (9) and the clamping plate (7). On the other side of the sleeve (5), there is a second anti-slip groove (10), and a steel wire rope (11) that is adapted to and passes through the second anti-slip groove (10) is fixed to the sleeve (5) by a pressure plate (6) that is fastened to the side opening of the second anti-slip groove (10) and detachably fixed to the sleeve (5); when the tensile composite pipe (8) is lowered into place in the vertical shaft, the sleeve (5) is fixed to the well wall or the crossbeam in the well to complete the fixation of the tensile composite pipe (8) in the vertical shaft.

8. The auxiliary device for laying pipes for vertical shaft tensile composite pipes according to claim 7, characterized in that: The first anti-slip groove (9) is a U-shaped groove with a slot that runs through the upper and lower surfaces of the sleeve (5) and located on the right side wall of the sleeve (5). The second anti-slip groove (10) is an arc-shaped groove that is adapted to the wire rope (11). The semi-circular groove surface of the first anti-slip groove (9) has a stepped anti-slip groove (12) with both ends extending to the vertical groove surface on the corresponding side. The arc-shaped groove surface of the second anti-slip groove (10) also has a stepped anti-slip groove (12).

9. The auxiliary device for laying pipes for vertical shaft tensile composite pipes according to claim 7, characterized in that: The card plate (7) is a cross-shaped plate structure that fits into the anti-slip groove (9) in the middle and into the mounting groove (13) on the right side wall of the sleeve (5) at both ends. The card plate (7) also has a stepped anti-slip groove (12) on the arc-shaped groove wall facing the anti-slip groove (9). The card plate (7) is fixed to the right side of the sleeve (5) by a fastening bolt (14) that fits into the threaded hole on the side wall of the mounting groove (13) through the through hole on both ends of the plate. The pressure plate (6) also has an anti-slip groove two (10) with a stepped anti-slip groove (12) on the side wall facing the anti-slip groove two (10). The pressure plate (6) is fixedly connected to the sleeve (5) by a locking bolt two (15) that is adapted to the threaded hole at the corresponding position on the left side wall of the sleeve (5) through the four corner through holes.

10. The auxiliary device for laying pipes for vertical shaft tensile composite pipes according to claim 7, characterized in that: The sleeve (5) has bolt holes at the four corners of the left side wall that extend to the right side wall. The tensile composite pipe (8) lowered into the shaft is fixedly installed on the shaft wall or the crossbeam by high-strength bolts (16) that are compatible with the bolt holes at the four corners of the sleeve (5) after the fastening bolts (14) used to connect the sleeve (5) and the plate (7) are removed, thereby realizing the fixed installation of the tensile composite pipe (8) in the shaft.

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