Continuous pipe butt joint equipment and method

Abstract

The invention provides continuous pipe butt joint equipment and method. The continuous pipe butt joint equipment comprises a straightening device, a centering device and a lifting device. The lifting device is used for driving the straightening device and the centering device to ascend and descend to the corresponding height of the two continuous pipes to be in butt joint. The straightening device comprises a straightening mechanism and two righting feeding mechanisms; the straightening mechanism is located between the two righting feeding mechanisms, and the straightening mechanism and the two righting feeding mechanisms are distributed along the same straight line. The righting feeding mechanism can reciprocate and drive the coiled tubing to step to the position of the straightening mechanism; the straightening mechanism is used for guiding and straightening the coiled tubing in the stepping process of the coiled tubing and clamping the coiled tubing in the returning movement process of the righting feeding mechanism; the centering device comprises a fixed clamping mechanism and a movable clamping mechanism which are oppositely arranged in a spaced mode. Rapid connection of the continuous pipe can be achieved, and the problem of pipe length in construction of the continuous pipe of an ultra-deep and ultra-long horizontal section well is solved.

Description

Technical Field

[0001] The present application relates to the technical field of oil pipe docking equipment, and in particular to a continuous pipe docking equipment and method. Background Art

[0002] Long horizontal wells can simultaneously cross multiple oil and gas layers at different depths, increasing the production of a single well, and therefore have been widely used in oilfield development at home and abroad. In response to the problem of the depth of the coiled tubing in the construction of long horizontal wells, research on the construction technology of long horizontal wells has been carried out at home and abroad, forming a series of downhole vibration friction reduction technologies and vibration friction reduction tools for coiled tubing, coiled tubing straightening technology, and a series of drag reducers. However, due to road transportation conditions, the current capacity of the coiled tubing drum can only meet the operation within a well depth of 6,500 meters, and it is difficult to carry out field operations for coiled tubing with a length of more than 7,000 meters.

[0003] In order to enhance the operating capacity of the coiled tubing and enable it to descend to a sufficient depth, it is usually connected by welding multiple coiled tubings together. However, during the well site construction process, due to the strict prohibition of fire operations, high welding quality requirements, and long welding time, special equipment is required to complete the work. Special equipment occupies a large area, and the construction site does not have the relevant personnel, equipment, and technical conditions. In the construction of oil and gas well coiled tubing, how to solve the pipe length problem of ultra-deep and ultra-long horizontal section coiled tubing construction through pipe-to-pipe docking is currently a major problem. Summary of the invention

[0004] In order to achieve rapid connection of coiled tubing and solve the pipe length problem of coiled tubing construction in ultra-deep and ultra-long horizontal wells, this application proposes a coiled tubing docking device and method, and adopts the following technical solutions:

[0005] In a first aspect, the present application discloses a continuous pipe docking device, including a straightening device, a centering device and a lifting device;

[0006] The lifting device is used to drive the straightening device and the centering device to rise and fall to the corresponding heights of the two coiled tubes to be butted;

[0007] The straightening device comprises a straightening mechanism and two straightening and feeding mechanisms;

[0008] The straightening mechanism is located between the two straightening and feeding mechanisms, and the straightening mechanism and the two straightening and feeding mechanisms are distributed along the same straight line;

[0009] The straightening and feeding mechanism can reciprocate and drive the coiled tubing to step to the position of the straightening mechanism;

[0010] The straightening mechanism is used to guide and straighten the coiled tubing during the stepping process of the coiled tubing, and to clamp the coiled tubing during the retracting movement of the straightening and feeding mechanism;

[0011] The centering device comprises a fixed clamping mechanism and a movable clamping mechanism which are arranged relatively spaced apart;

[0012] The fixed clamping mechanism is used to fixedly clamp one of the straightened continuous tubes, and the movable clamping mechanism is used to clamp the other straightened continuous tube and can drive the corresponding continuous tube to move so that the two continuous tubes are aligned.

[0013] Optionally, the centering device further includes an automatic detection mechanism;

[0014] The automatic detection mechanism is used to detect the centering deviation and can control the movable clamping mechanism to drive the corresponding continuous tube to move so as to center the two continuous tubes.

[0015] Optionally, the lifting device includes a lifting drive mechanism and an integrated base;

[0016] The lifting drive mechanism is connected to the integrated base and is used to drive the integrated base to lift;

[0017] The straightening device and the centering device are both installed on the integrated base.

[0018] Optionally, the straightening and feeding mechanism comprises a feeding support, a feeding driving member and a feeding clamping assembly;

[0019] The feed support is slidably arranged on the integrated base;

[0020] The feed drive is used to drive the feed support to reciprocate so as to step the coiled tube to the position of the straightening mechanism;

[0021] The feed clamping assembly is arranged on the feed support and is used for clamping and pulling the continuous pipe.

[0022] Optionally, the straightening and feeding mechanism further includes at least one set of guide components;

[0023] The guide assembly is arranged on the feed support, and at least one group of the guide assembly is located on a side of the feed clamping assembly away from the straightening mechanism;

[0024] The guide assembly is used to guide the continuous pipe.

[0025] Optionally, the feed clamping assembly includes a clamping drive member and two clamping members arranged opposite to each other;

[0026] A passage for the continuous pipe to pass through is formed between the two clamping members;

[0027] The clamping driving member is used to drive the two clamping members to move toward or away from each other.

[0028] Optionally, the guide assembly includes a guide drive member and two guide rollers arranged opposite to each other;

[0029] The two guide rollers are arranged on the feed support at a relative interval;

[0030] The guide driving member is used for driving the two guide rollers to move toward or away from each other.

[0031] Optionally, the straightening mechanism includes several groups of straightening rollers and several groups of straightening pre-tightening components;

[0032] A plurality of groups of the straightening and pre-tightening components and the straightening rollers are arranged at intervals relative to each other to form a channel for the continuous tube to pass through;

[0033] Several groups of the straightening and pre-tightening components are distributed along the same straight line, and several groups of the straightening rollers are distributed along the same straight line;

[0034] The straightening rollers and the straightening pre-tightening components are distributed alternately and at intervals along the feeding direction of the straightening feeding mechanism.

[0035] Optionally, each group of the straightening and pre-tightening components includes a pre-tightening driving member and a pre-tightening member;

[0036] The pre-tightening driving member is connected to the pre-tightening member and is used to drive the pre-tightening member to move toward the opposite side so as to clamp the continuous pipe together with the straightening roller during the retracting movement of the straightening feeding mechanism.

[0037] Optionally, it further comprises a mounting frame, the mounting frame is connected to the integrated base, and the mounting frame comprises a docking layer located at the upper end;

[0038] Both ends of the butt joint layer along the feeding direction are provided with fixing grooves for fixing the continuous tube.

[0039] Optionally, the lifting device further comprises a fixed support, wherein the fixed support is located at one side of the integrated base and is used to fix the integrated base at a corresponding height of the continuous pipe.

[0040] Optionally, the mobile clamping mechanism comprises a multi-degree-of-freedom mobile assembly, a mounting panel and at least one set of mobile clamping assemblies;

[0041] The multi-degree-of-freedom moving assembly is arranged on the integrated base, and is used to drive the mounting panel to move in multiple directions;

[0042] The movable clamping assembly is arranged on the mounting panel and is used for clamping the continuous pipe.

[0043] Optionally, the lifting drive mechanism includes a double-scissor hydraulic lifting platform, which is arranged at the bottom of the integrated base and can drive the integrated base to rise and fall.

[0044] In a second aspect, the present application further discloses a method for butt jointing a continuous tube, using the continuous tube butt jointing device as described in the first aspect.

[0045] Optionally, the coiled tube docking method includes moving the coiled tube docking equipment between two coiled tubes, and raising the straightening device and the centering device to a height corresponding to the coiled tubes;

[0046] Extract two continuous pipe ends to the corresponding straightening and feeding mechanisms respectively;

[0047] The coiled tubing is fed into the straightening mechanism through the corresponding straightening and feeding mechanism to straighten the coiled tubing;

[0048] Pull one of the continuous tubes onto the fixed clamping mechanism, and pull the other continuous tube onto the movable clamping mechanism;

[0049] Align the two continuous pipes and connect them to each other;

[0050] Lower the straightening device and centering device and transport them back

[0051] Based on the above technical solution, the beneficial effects of this application compared with the prior art are as follows:

[0052] The continuous pipe docking equipment in the embodiment of the present application integrates the straightening device and the centering device, realizes the continuity of the straightening and centering process during the continuous pipe docking process, improves the efficiency of continuous pipe-to-pipe docking, and greatly reduces the floor space, making construction convenient. In addition, the lifting device drives the straightening device and the centering device to descend to the lowest position so that the lifting device, the straightening device and the centering device can be removed, and then all the continuous pipes on the auxiliary roller are poured onto the main roller, and related operations are carried out after completion. Compared with withdrawing the continuous pipe from the docking equipment, the present application withdraws the straightening device and the centering device after the docking is completed, and there is no need to transfer the continuous pipe from the docking equipment by a crane, which can shorten the operation speed of the continuous pipe after docking and ensure construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a schematic diagram of the overall structure of the continuous pipe docking equipment in the embodiment of the present application;

[0054] Figure 2 is a schematic structural diagram of a straightening device in an embodiment of the present application;

[0055] Figure 3 is a schematic structural diagram of a centering device in an embodiment of the present application;

[0056] Figure 4 is a flow chart of the method for connecting coiled tubes in an embodiment of the present application;

[0057] Description of reference numerals:

[0058] 1. Straightening device; 11. Straightening feed mechanism; 111. Feed support; 112. Feed drive; 113. Feed clamping assembly; 1131. Clamping drive; 1132. Clamping member; 114. Guide assembly; 1141. Guide drive; 1142. Guide roller; 115. Feed slide rail; 12. Straightening mechanism; 121. Straightening preload assembly; 1211. Preload drive; 1212. Preload member; 122. Straightening roller; 2. Centering device; 21. Fixing clamp Tightening mechanism; 211, fixed support; 212, fixed clamping assembly; 22, mobile clamping mechanism; 221, multi-degree-of-freedom mobile assembly; 2211, X-axis moving part; 2212, Y-axis moving part; 2213, Z-axis moving part; 222, mounting panel; 223, mobile clamping assembly; 3, lifting device; 31, lifting drive mechanism; 311, double-scissor hydraulic lifting platform; 32, integrated base; 33, fixed support; 34, flip pedal; 4, mounting frame; 41, fixing groove. DETAILED DESCRIPTION

[0059] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0060] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0061] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0062] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0063] The inventors found that the coiled tube formed by welding two coiled tubes has a severely reduced internal pressure resistance, tensile strength, and fatigue resistance compared to the original pipe column. In order to minimize the impact of welding on its performance, the coiled tube needs to be straightened and centered before connection. To ensure the accuracy of straightening and centering, it is generally necessary to use special equipment to complete it. However, since the coiled tube itself is relatively large in size, and the current special equipment occupies a large area as a whole, it is not conducive to the convenience of construction. In addition, after the pipes are butt-jointed, the butt-jointing equipment is also likely to affect the subsequent construction of the coiled tube. How to improve the operation speed of the coiled tube after the butt-jointing work is also a major difficulty at present.

[0064] In order to solve the problems in the above-mentioned related technologies, the embodiments of the present application propose a continuous pipe docking device and method. The following describes in detail various embodiments of the anti-clogging filtering device, system and method in the embodiments of the present application.

[0065] In the first aspect, the present application embodiment discloses a continuous pipe docking device, referring to Figure 1, including a straightening device 1, a centering device 2 and a lifting device 3. The lifting device 3 is used to drive the straightening device 1 and the centering device 2 to rise and fall to the corresponding heights of the two continuous pipes to be butted. The straightening mechanism 12 is located between the two straightening and feeding mechanisms 11, and the straightening mechanism 12 and the two straightening and feeding mechanisms 11 are distributed along the same straight line; the straightening and feeding mechanism 11 can reciprocate and drive the continuous pipe to step to the position of the straightening mechanism 12; the straightening mechanism 12 is used to guide and straighten the continuous pipe during the stepping process of the continuous pipe, and clamp the continuous pipe during the retreating movement of the straightening and feeding mechanism 11; the centering device 2 includes a fixed clamping mechanism 21 and a movable clamping mechanism 22 arranged at a relative interval; the fixed clamping mechanism 21 is used to fix and clamp one of the straightened continuous pipes, and the movable clamping mechanism 22 is used to clamp the other straightened continuous pipe and can drive the corresponding continuous pipe to move, so that the two continuous pipes are centered.

[0066] When connecting and fixing two coiled pipes, first move the coiled pipe docking equipment between the two coiled pipes to be docked, and drive the straightening device 1 and the centering device 2 to move to the corresponding height of the coiled pipes through the lifting device 3. Then, the ends of the two coiled pipes are respectively sent to the straightening mechanism 12 in the middle by the corresponding straightening feeding mechanism 11 to straighten the coiled pipes. After straightening, one of the coiled pipes is further pulled to the fixed clamping mechanism 21 and stably clamped; the other coiled pipe is pulled to the mobile clamping mechanism 22. While clamping the coiled pipe, the mobile clamping mechanism 22 can drive it to align with the fixed coiled pipe on the opposite side. After centering, the two coiled pipes are connected and fixed by the docking extension tool.

[0067] The continuous pipe docking equipment in the embodiment of the present application integrates the straightening device 1 and the centering device 2, realizes the continuity of the straightening and centering process during the continuous pipe docking process, improves the efficiency of continuous pipe-to-pipe docking, and greatly reduces the floor space, making construction convenient. In addition, the lifting device 3 drives the straightening device 1 and the centering device 2 to descend to the lowest position so that the lifting device 3, the straightening device 1 and the centering device 2 can be removed, and then all the continuous pipes on the auxiliary roller are poured onto the main roller, and related operations are carried out after completion. Compared with withdrawing the continuous pipe from the docking equipment, the present application withdraws the straightening device 1 and the centering device 2 after the docking is completed, and there is no need to transfer the continuous pipe from the docking equipment by a crane, which can shorten the operation speed of the continuous pipe after docking and ensure construction efficiency.

[0068] In an alternative embodiment, referring to Figure 1The mounting frame 4 is a double-layer type. Specifically, the mounting frame 4 includes a docking layer at the upper end and an installation layer at the lower end, wherein the docking layer is used to fix the continuous pipe to further carry out docking work; the installation layer is used to install the mounting frame 4 as a whole on the corresponding lifting device 3. Furthermore, both ends of the docking layer along the feeding direction are correspondingly provided with fixing grooves 41 for fixing the continuous pipe. Specifically, the shape of the fixing groove 41 can be adjusted according to actual conditions, such as one of V-shaped, square or circular. The number of the fixing grooves 41 is specifically two groups, and the two groups of fixing grooves 41 correspond to the straightening device 1 and the centering device 2, respectively, so as to facilitate the continuous pipe to be smoothly pulled to the centering device 2 for centering after straightening.

[0069] In an alternative embodiment, referring to Figure 1 The lifting device 3 includes a lifting drive mechanism 31, an integrated base 32 and a fixed support 33. The straightening device 1 and the centering device 2 are sequentially installed on the integrated base 32 along the width direction, and can be detachably installed on the integrated base 32 by bolts or the like. The lifting drive mechanism 31 is connected to the integrated base 32 to drive the integrated base 32 to move in the vertical direction. The fixed support 33 is arranged in the vertical direction, and a plurality of positioning holes are evenly opened on the fixed support 33 in the vertical direction to fix the integrated base 32. When the lifting drive mechanism 31 drives the integrated base 32 to rise to the docking layer, the integrated base 32 and the fixed support 33 can be fixed by a latch or a pin. The lifting device 3 is used to drive the straightening device 1 and the centering device 2 to rise and fall in the mounting frame 4, so as to reduce the overall footprint of the docking equipment as much as possible. When the docking is completed, the lifting device 3 is used to drive the straightening device 1 and the centering device 2 to descend, so as to facilitate the removal of the straightening device 1 and the centering device 2, thereby improving the operation speed of the continuous pipe after docking.

[0070] In an alternative embodiment, referring to Figure 1 In this embodiment, the lifting drive mechanism 31 is a double-scissor type hydraulic lifting platform 311, and the mounting frame 4 is mounted on the outer frame of the double-scissor type hydraulic lifting platform 311 through the sliding card of the mounting layer at the lower end, and the integrated base 32 is connected to the mounting frame 4, so that the double-scissor type hydraulic lifting platform 311 can simultaneously drive the integrated base 32 and the mounting frame 4 to rise together. Since the scissor-type lifting platform belongs to the existing technology, it will not be described in detail. In other embodiments, the lifting function can also be achieved by other lifting drive mechanisms 31, such as a motor, a screw rod matching lifting structure, a cylinder drive lifting structure, or a gear rack matching lifting structure. Since the above lifting structures are all relatively mature existing technologies, they will not be described here.

[0071] In an alternative embodiment, referring to Figure 1The lifting device 3 further includes a flip pedal 34, which is rotatably arranged on both sides of the integrated base 32 perpendicular to the feeding direction. Before the integrated base 32 is raised to a suitable height, the flip pedal 34 is flipped up to protect the straightening device 1 and the centering device 2.

[0072] In an alternative embodiment, referring to Figure 1 and Figure 2 , two groups of straightening and feeding mechanisms 11 are respectively located at the two ends of the mounting frame 4 near the fixed groove 41, and each group of straightening and feeding mechanisms 11 includes a feeding support 111, a feeding drive 112, a feeding clamping assembly 113 and a guiding assembly 114. The feeding support 111 is slidably arranged on the integrated base 32. Specifically, the integrated base 32 is provided with a feeding slide rail 115 for the feeding support 111 to slide, and extends toward the straightening mechanism 12. The feeding drive 112 is used to drive the feeding support 111 to reciprocate along the feeding slide rail 115 to step the continuous pipe to the position of the straightening mechanism 12. The feeding drive 112 is specifically a hydraulic cylinder, and in other embodiments, any driving method such as a motor, a cylinder, etc. can also be adopted.

[0073] In an optional embodiment, the feeding drive 112 pushes the continuous tube to feed stepwise on the feeding slide 115, and each feeding is 200mm to 500mm, which is adjusted to 300mm in this embodiment. It should be understood that the feeding slide 115 should extend to both sides of the straightening mechanism 12 to ensure that the end of the continuous tube can extend into the straightening mechanism 12 when the straightening feeding mechanism 11 completes the first feeding action.

[0074] Reference Figure 2 In an optional embodiment, referring to Figure 2 The guide assembly 114 and the feed clamping assembly 113 are sequentially arranged on the feed support 111 along the feeding direction, wherein the guide assembly 114 is used to guide the coiled tube, and the feed clamping assembly 113 is used to clamp the corresponding coiled tube end to fix the coiled tube and feed it into the straightening mechanism 12 by stepping. The guide assembly 114 and the feed clamping assembly 113 are located on the same horizontal line to better feed the coiled tube in a stable direction.

[0075] Specifically, in an optional embodiment, refer to Figure 2The feed clamping assembly 113 includes a clamping drive 1131 and two clamping members 1132 arranged opposite to each other. The two clamping members 1132 form a channel for the continuous pipe to pass through. The clamping drive 1131 is used to drive the two clamping members 1132 to move closer or farther away from each other. It should be noted that in this embodiment, one of the clamping members 1132 is fixed on the feed support 111, and the other clamping member 1132 is slidably arranged on the feed support 111 and driven by the clamping drive 1131. The clamping drive 1131 is specifically any one of a hydraulic cylinder, a cylinder or a motor, and the clamping member 1132 is specifically a clamping slip, which is specifically in an arc shape that fits the outer wall of the continuous pipe to avoid damage to the continuous pipe. By replacing the matching clamping member 1132, it can adapt to continuous pipes of different diameters.

[0076] In an alternative embodiment, referring to Figure 2 The guide assembly 114 includes a guide drive 1141 and two guide rollers 1142 arranged opposite to each other. The two guide rollers 1142 are arranged on the feed support 111 at a relative interval. The guide drive 1141 is used to drive the two guide rollers 1142 to move closer to or away from each other. It should be noted that in this embodiment, one of the guide rollers 1142 is fixed on the feed support 111, and the other guide roller 1142 is slidably arranged on the feed support 111 and driven by the clamping drive 1131. The guide drive 1141 is also specifically any one of a hydraulic cylinder, a cylinder, and a motor. Continuous pipes of different diameters can also be connected by replacing the guide rollers 1142.

[0077] In an alternative embodiment, referring to Figure 2 , the straightening mechanism 12 includes a plurality of straightening rollers 122 and a plurality of straightening pre-tightening components 121. Specifically, a plurality of straightening pre-tightening components 121 and straightening rollers 122 are arranged at intervals relative to each other to form a channel for the continuous pipe to pass through; a plurality of straightening pre-tightening components 121 are distributed along the same straight line, and a plurality of straightening rollers 122 are distributed along the same straight line, so as to guide and straighten the continuous pipe; the straightening rollers 122 and the straightening pre-tightening components 121 are alternately and spaced along the feeding direction of the straightening and feeding mechanism 11. Under the joint action of the straightening and feeding mechanism 11 and the straightening mechanism 12, the continuous pipe moves forward in a fixed direction between the straightening pre-tightening components 121 and the straightening rollers 122, and the forward distance is 1.2m to 1.6m, which is specifically set to 1.5m in this embodiment.

[0078] In an optional embodiment, the number of straightening pre-tightening components 121 and straightening rollers 122 can be adjusted according to actual needs. Specifically, in this embodiment, three groups of straightening pre-tightening components 121 and two groups of straightening rollers 122 are included.

[0079] In an alternative embodiment, referring to Figure 2Each group of straightening and pre-tightening components 121 includes a pre-tightening drive 1211 and a pre-tightening member 1212. The pre-tightening member 1212 is slidably arranged along the width direction of the integrated base 32. The pre-tightening drive 1211 is connected to the pre-tightening member 1212 and is used to drive the pre-tightening member 1212 to move toward the opposite side, so as to clamp the continuous pipe together with the straightening roller 122 during the retracting movement of the straightening and feeding mechanism 11. Specifically, the pre-tightening drive 1211 is also any one of a cylinder or a hydraulic cylinder, and the pre-tightening member 1212 is specifically waist-shaped. When used specifically, the movement mode of the pre-tightening drive 1211 can be selected according to the bending type of the continuous pipe.

[0080] In an alternative embodiment, referring to Figure 2 The specific feeding process is as follows: first, the continuous pipe end is fixed by the feeding clamping assembly 113, and the clamped continuous pipe end should exceed the feeding clamping assembly 113 by about 0.5m, and then the feeding driving member 112 drives the feeding support 111 to feed step by step toward the straightening mechanism 12. After the first feeding, the continuous pipe end enters between a group of straightening rollers 122 and the straightening pre-tightening assembly 121 inside the straightening mechanism 12, and the pre-tightening driving member 1211 at the end starts to work to clamp the continuous pipe end; then the straightening feeding mechanism 11 is relaxed and returned to its original position, and the above feeding steps are repeated at the next position of the continuous pipe. The straightening feeding mechanism 11 advances 300 mm each time, and the feeding clamping assembly 113 is alternately clamped and loosened, and the straightening mechanism 12 clamps the coiled tubing during the retracting movement of the straightening feeding mechanism 11, thereby achieving guidance and automatic straightening, and minimizing damage to the coiled tubing during the straightening process, thereby improving the straightening efficiency and quality.

[0081] In an alternative embodiment, referring to Figure 3 The fixed clamping mechanism 21 is located at one side adjacent to one end of the straightening mechanism 12. The fixed clamping mechanism 21 includes a fixed support 211 and a plurality of fixed clamping assemblies 212. The fixed clamping assemblies 212 are used to clamp and fix one of the straightened continuous pipes. Specifically, the fixed support 211 is arranged on the integrated base 32, and a plurality of fixed clamping assemblies 212 are arranged on the fixed support 211 at intervals along the same straight line. The number of fixed clamping assemblies 212 is specifically two groups, and the two groups of fixed clamping assemblies 212 are spaced apart along the length direction of the integrated base 32.

[0082] In an optional embodiment, the fixed clamping assembly 212 adopts the same structure as the feed clamping assembly 113 in the straightening feed mechanism 11, which will not be described again here.

[0083] In an alternative embodiment, referring to Figure 3The mobile clamping mechanism 22 is located on the same side of the other end of the straightening mechanism 12 and is arranged opposite to the fixed clamping mechanism 21. The mobile clamping mechanism 22 includes a multi-degree-of-freedom mobile component 221, a mounting panel 222, and a plurality of groups of mobile clamping components 223. The multi-degree-of-freedom mobile component 221 is arranged on the integrated base 32 and is used to drive the mounting panel 222 to move in multiple directions. The plurality of groups of mobile clamping components 223 are arranged on the mounting panel 222 at intervals along the length direction of the integrated base 32.

[0084] In an alternative embodiment, referring to Figure 3 The multi-degree-of-freedom moving assembly 221 includes an X-axis moving part 2211, a Y-axis moving part 2212 and a Z-axis moving part 2213 connected in sequence from bottom to top. Specifically, the X-axis moving part 2211 includes an X-axis slide rail and an X-axis driving part; the Y-axis moving part 2212 includes a Y-axis slide rail and a Y-axis driving part; the Z-axis moving part 2213 includes a vertical guide column and a screw motor. It should be noted that the X-axis slide rail and the Y-axis slide rail are perpendicular to each other, and the X-axis driving part and the Y-axis driving part are both cylinders or hydraulic cylinders. The mounting panel 222 is threadedly connected to the output shaft of the screw motor to achieve lifting and lowering, and is guided by the vertical guide column.

[0085] Therefore, the multi-degree-of-freedom moving assembly 221 is built up layer by layer, so that the Y-axis moving part 2212 can move along the X-axis slide rail as a whole; the Z-axis moving part 2213 can further move along the Y-axis slide rail as a whole; and the mounting panel 222 on the Z-axis moving part 2213 can further move along the vertical guide column. This drives the moving clamping mechanism 22 on the panel to move to correspond to the fixed clamping mechanism 21 on the opposite side. It should be noted that this embodiment only provides an implementation method of a multi-degree-of-freedom moving assembly 221. In other embodiments, any one or more moving parts can also be adjusted, which will not be repeated here.

[0086] In an optional embodiment, the number of the movable clamping assemblies 223 is specifically two groups, and the two groups of movable clamping assemblies 223 are spaced apart along the length direction of the integrated base 32. It should be noted that the movable clamping assemblies 223 have the same structure as the fixed clamping assemblies 212, and will not be described again here.

[0087] In an optional embodiment, the centering device 2 further includes an automatic detection mechanism (not marked in the figure), which is used to detect the centering deviation and can control the displacement of the multi-degree-of-freedom moving assembly 221. Specifically, the automatic detection mechanism includes a grating displacement sensor and a controller, wherein the displacement sensor can automatically detect the centering deviation of the two continuous tubes and feed it back to the controller; the controller is connected to the X-axis driving member, the Y-axis driving member and the lead screw motor of the multi-degree-of-freedom moving assembly 221, and according to the obtained displacement deviation value, a control instruction is issued to the corresponding driving member to make it move to complete the centering.

[0088] It needs to be further explained that in this embodiment, the two continuous tubes can be straightened and pulled to the centering device 2 in steps. Specifically, after one of the continuous tubes is straightened for 1.5m in the straightening mechanism 12, the straightening mechanism 12 and the straightening feeding mechanism 11 are opened, and the continuous tube is fixed by a crane, and the continuous tube is pulled to the fixed clamping mechanism 21 on the side of the centering device 2 through the fixed groove 41, and the clamped continuous tube end exceeds the fixed clamping mechanism 21 by 0.5m; then the other continuous tube is pulled into the centering device 2 in the same way. Of course, the two continuous tubes can also be straightened and pulled at the same time, and when each enters the centering device 2, the centering device 2 performs the centering.

[0089] In an optional embodiment, in order to facilitate the transportation and movement of the entire device, a moving mechanism, such as a universal wheel, may be connected to the lifting device 3 according to actual needs.

[0090] In summary, the continuous pipe docking equipment in the embodiment of the present application centrally installs the straightening device 1 and the centering device 2 through the integrated base 32, thereby reducing the space area occupied by the entire equipment; and the lifting device 3 drives the lifting of the integrated base 32, so that the straightening device 1 and the centering device 2 are close to the continuous pipe for docking. The lifting device 3 is lifted and lowered vertically to facilitate the docking work and the withdrawal of the straightening device 1 and the centering device 2 after the docking is completed. The straightening device 1 adopts the straightening feeding mechanism 11 to realize automatic feeding, and the straightening mechanism 12 to straighten, thereby ensuring the efficiency and quality of straightening. The centering device 2 adopts a fixed clamping mechanism 21 and a movable clamping mechanism 22, so that one continuous pipe is kept fixed during centering, and the other continuous pipe is moved to align the two, and the centering deviation is automatically detected by the automatic detection mechanism to improve the centering accuracy.

[0091] In a second aspect, the present application also discloses a method for connecting a continuous tube, using the continuous tube connecting device of the first aspect. Figure 4 , the coiled tubing docking methods include:

[0092] S101: Move the coiled tube docking device between two coiled tubes, and raise the straightening device 1 and the centering device 2 to the corresponding height of the coiled tubes;

[0093] S102: extracting two continuous pipe ends respectively into corresponding straightening and feeding mechanisms 11;

[0094] S103: The coiled tubing is fed into the straightening mechanism 12 through the corresponding straightening and feeding mechanism 11 to straighten the coiled tubing;

[0095] S104: pulling one of the continuous tubes onto the fixed clamping mechanism 21, and pulling the other continuous tube onto the movable clamping mechanism 22;

[0096] S105: Align the two continuous pipes to complete the docking;

[0097] S106: lower the straightening device 1 and the centering device 2 and transport them back.

[0098] In an optional embodiment, in step S101, before the straightening device 1 and the centering device 2 are raised, two rollers are independently transported to the well, and the continuous pipes to be docked are wound on the rollers. It should be noted that the roller on which the continuous pipe after docking is located is the main roller, and the other roller is the auxiliary roller. The main roller and the auxiliary roller are placed in the specified position for the equipment to enter the site, and the main roller is expanded and raised and lowered accordingly. The auxiliary roller is installed on the pipe reverser. The continuous pipe docking equipment is placed in the middle of the two rollers, the flip pedal 34 is opened, and the lifting device 3 is operated after the guardrail is installed to make the integrated base 32 rise between the two continuous pipe ends.

[0099] In an optional embodiment, in steps S102 to S103, a crane may be used to pull the coiled tubes on the main drum and the auxiliary drum through the mounting frame 4 to the straightening and feeding mechanism 11. Specifically, the coiled tube on one of the drums may be first fed into the straightening and feeding mechanism 11, and further straightened through the straightening mechanism 12, and then the other coiled tube may be fed into the straightening mechanism 12 through the straightening and feeding mechanism 11 for straightening. Alternatively, the ends of the two coiled tubes may be fed into the straightening mechanism 12 at the same time, and the straightening is completed at the same time.

[0100] In an optional embodiment, in step S105, when two continuous tubes are aligned, the centering offset is mainly detected by a displacement sensor, and the centering offset is fed back to a controller to control the displacement of the multi-degree-of-freedom displacement assembly.

[0101] In an optional embodiment, in step S105, before the two continuous tubes are aligned, the ends of the continuous tubes should be pre-processed. Specifically, a continuous tube cutting tool is used to select suitable positions for cutting the continuous tubes at both ends, and a continuous tube inner hole trimming tool is used to grind the inner hole weld of the continuous tube and chamfer the tube ends. In addition, the butt joint should be performed by a butt joint extension tool. Specifically, the butt joint extension tool is first installed on the continuous tube on the fixed clamping mechanism 21, and the butt joint extension tool is fixed by a pit pressing tool; the two continuous tubes are aligned by an automatic detection mechanism through XYZ three-directional movement, and then the other end of the butt joint extension tool is installed on the opposite side of the continuous tube, and the butt joint extension tool is fixed by a pit pressing tool. Thus, the centering and connection process is completed.

[0102] It should be noted that the butt extension tool and the pit suppression tool belong to the prior art. For example, the butt extension tool can be the butt tube described in patent CN206458333U, and the pit suppression tool can be the suppression tool described in patent CN2016214924601.

[0103] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", as explained by "including" used as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A continuous pipe docking device, characterized in that: It comprises a straightening device (1), a centering device (2) and a lifting device (3); The lifting device (3) is used to drive the straightening device (1) and the centering device (2) to rise and fall to the corresponding height of the two coiled tubes to be butted; The straightening device (1) comprises a straightening mechanism (12) and two straightening and feeding mechanisms (11); The straightening mechanism (12) is located between the two straightening and feeding mechanisms (11), and the straightening mechanism (12) and the two straightening and feeding mechanisms (11) are distributed along the same straight line; The straightening and feeding mechanism (11) is capable of reciprocating and driving the coiled tubing to step to the position of the straightening mechanism (12); The straightening mechanism (12) is used to guide and straighten the coiled tube during the stepping process of the coiled tube, and to clamp the coiled tube during the retracting movement of the straightening and feeding mechanism (11); The centering device (2) comprises a fixed clamping mechanism (21) and a movable clamping mechanism (22) which are arranged relatively spaced apart; The fixed clamping mechanism (21) is used to fixedly clamp one of the straightened continuous tubes, and the movable clamping mechanism (22) is used to clamp the other straightened continuous tube and can drive the corresponding continuous tube to move so that the two continuous tubes are aligned.

2. The continuous pipe butt jointing equipment according to claim 1, characterized in that: The centering device (2) also includes an automatic detection mechanism; The automatic detection mechanism is used to detect the centering deviation and can control the movable clamping mechanism (22) to drive the corresponding continuous tube to move so as to center the two continuous tubes.

3. The continuous pipe butt jointing equipment according to claim 1, characterized in that: The lifting device (3) comprises a lifting drive mechanism (31) and an integrated base (32); The lifting drive mechanism (31) is connected to the integrated base (32) and is used to drive the integrated base (32) to lift; The straightening device (1) and the centering device (2) are both mounted on the integrated base (32).

4. The continuous pipe docking equipment according to claim 3, characterized in that: The straightening and feeding mechanism (11) comprises a feeding support (111), a feeding driving member (112) and a feeding clamping assembly (113); The feed support (111) is slidably arranged on the integrated base (32); The feed drive (112) is used to drive the feed support (111) to reciprocate so as to step the coiled tube to the position of the straightening mechanism (12); The feed clamping assembly (113) is arranged on the feed support (111) and is used for clamping and pulling the continuous pipe.

5. The continuous pipe butt jointing equipment according to claim 3, characterized in that: The straightening and feeding mechanism (11) further comprises at least one set of guide components (114); The guide assembly (114) is arranged on the feed support (111), and at least one group of the guide assembly (114) is located on a side of the feed clamping assembly (113) away from the straightening mechanism (12); The guide assembly (114) is used to guide the continuous pipe.

6. The continuous pipe butt jointing equipment according to claim 3, characterized in that: The feeding clamping assembly (113) comprises a clamping driving member (1131) and two clamping members (1132) arranged opposite to each other; A passage for the continuous tube to pass through is formed between the two clamping members (1132); The clamping driving member (1131) is used to drive the two clamping members (1132) to move towards or away from each other.

7. The continuous pipe butt jointing equipment according to claim 4, characterized in that: The guide assembly (114) comprises a guide driving member (1141) and two guide rollers (1142) arranged opposite to each other; The two guide rollers (1142) are arranged on the feed support (111) at a relative interval; The guide driving member (1141) is used to drive the two guide rollers (1142) to move toward or away from each other.

8. The continuous pipe docking equipment according to claim 3, characterized in that: The straightening mechanism (12) comprises a plurality of groups of straightening rollers (122) and a plurality of groups of straightening pre-tightening components (121); A plurality of groups of the straightening and pre-tightening components (121) and the straightening rollers (122) are arranged at intervals relative to each other to form a channel for the continuous tube to pass through; A plurality of groups of the straightening and pre-tightening components (121) are distributed along the same straight line, and a plurality of groups of the straightening rollers (122) are distributed along the same straight line; The straightening rollers (122) and the straightening pre-tightening components (121) are distributed alternately and at intervals along the feeding direction of the straightening feeding mechanism (11).

9. The continuous pipe butt jointing equipment according to claim 7, characterized in that: Each group of the straightening and pre-tightening components (121) comprises a pre-tightening driving member (1211) and a pre-tightening member (1212); The pre-tightening drive member (1211) is connected to the pre-tightening member (1212) and is used to drive the pre-tightening member (1212) to move toward the opposite side so as to clamp the continuous tube together with the straightening roller (122) during the retracting movement of the straightening feeding mechanism (11).

10. The continuous pipe butt jointing equipment according to claim 3, characterized in that: It also includes a mounting frame (4), the mounting frame (4) is connected to the integrated base (32), and the mounting frame (4) includes a docking layer located at the upper end; Both ends of the butt joint layer along the feeding direction are provided with fixing grooves (41) for fixing the continuous tube.

11. The continuous pipe butt jointing equipment according to claim 3, characterized in that: The lifting device (3) further comprises a fixed support (33), wherein the fixed support (33) is located on one side of the integrated base (32) and is used to fix the integrated base (32) at a corresponding height of the continuous pipe.

12. The continuous pipe butt jointing equipment according to claim 3, characterized in that: The mobile clamping mechanism (22) comprises a multi-degree-of-freedom mobile component (221), a mounting panel (222) and at least one group of mobile clamping components (223); The multi-degree-of-freedom moving component (221) is arranged on the integrated base (32) and is used to drive the installation panel (222) to move in multiple directions; The movable clamping assembly (223) is arranged on the mounting panel (222) and is used for clamping the continuous pipe.

13. The continuous pipe butt jointing equipment according to claim 3, characterized in that: The lifting drive mechanism (31) is a double-scissor type hydraulic lifting platform (311), and the double-scissor type hydraulic lifting platform (311) is arranged at the bottom of the integrated base (32) and can drive the integrated base (32) to rise and fall.

14. A method for butt-jointing coiled tubing, using the coiled tubing butt-jointing apparatus according to any one of claims 1 to 13.

15. The method for butt jointing coiled tubes according to claim 14, characterized in that: include: Move the coiled tube docking device between two coiled tubes, and raise the straightening device (1) and the centering device (2) to a height corresponding to the coiled tubes; Respectively extracting two continuous pipe ends to corresponding straightening and feeding mechanisms (11); The coiled tubing is fed into a straightening mechanism (12) through a corresponding straightening and feeding mechanism (11) to straighten the coiled tubing; Pulling one of the continuous tubes onto a fixed clamping mechanism (21), and pulling the other continuous tube onto a movable clamping mechanism (22); Align the two continuous pipes and connect them to each other; The straightening device (1) and the centering device (2) are lowered and transported back.

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