Integrated suspension device and oil pipe suspension method

Abstract

The invention relates to the technical field of oil pipe suspension, in particular to an integrated suspension device and an oil pipe suspension method.The integrated suspension device comprises a mounting part, a connecting part and a clamping part; a first through hole and a second through hole communicated with the first through hole are formed in the mounting part; the connecting part is movably arranged in the second through hole; the clamping part is arranged in the circumferential direction of the oil pipe and connected with the connecting end. And when the connecting part is far away from the first through hole, the connection between the connecting end and the clamping part is released, and the clamping part moves in the direction far away from the second through hole until the inner wall of the first through hole tightly presses the clamping part on the periphery of the oil pipe. According to the oil pipe hanging device, the oil pipe can be hung without detaching and lifting an external connecting tool, the operation steps are reduced, the operation efficiency is improved, the safety risk during oil pipe hanging is avoided, all parts of the clamping part can be kept at the same horizontal height, the clamping effect on the oil pipe is prevented from being affected, and the oil pipe hanging stability is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tubing hangers, and particularly relates to an integrated hanging device and a tubing hanging method. Background Art

[0002] In related projects of oil fields, auxiliary hanging for tubing is generally provided by setting up a hanging device, so as to facilitate the overall structural layout of the process string.

[0003] Existing tubing hanging devices usually insert two or more split tile pieces into a conversion flange in the wellhead, and clamp the tubing by squeezing the frictional force generated between each split tile piece and the tubing body, so as to realize the hanging of the tubing. However, the existing multi-piece split tile pieces and the conversion flange for inserting the split tile pieces are generally of a split structure, resulting in difficulty in keeping the multi-piece split tile pieces at the same horizontal height, and it is very easy to generate a height difference when placing the split tile pieces, thus affecting the clamping effect on the tubing, reducing the stability of tubing hanging. At the same time, when it is necessary to insert the split tile pieces, it is necessary to first disassemble and separate the external connection tool provided above the conversion flange from the conversion flange and lift it to a certain height, which not only results in low efficiency in completing tubing hanging due to the cumbersome operation process, but also poses a safety risk during the process of completing tubing hanging due to lifting the external connection tool.

[0004] Therefore, the existing tubing hanging device has low efficiency and poor effect when in use. Summary of the Invention

[0005] In view of the above problems, the present invention provides an integrated hanging device and a tubing hanging method. Among them, an integrated hanging device includes:

[0006] An installation part, in which a first through hole for the tubing to pass coaxially is provided, and a second through hole is further provided in the installation part. One end of the second through hole faces the first through hole and is communicated with the first through hole;

[0007] A connection part, which is movably arranged in the second through hole, and the connection end of the connection part faces the first through hole;

[0008] A clamping part, which is arranged around the circumference of the tubing in the first through hole and is connected to the connection end of the connection part;

[0009] When the connection part moves in a direction away from the first through hole, the connection between the connection end of the connection part and the clamping part is released;

[0010] The inner diameter dimension of one end of the first through hole far from the second through hole is smaller than the inner diameter dimension of one end of the first through hole close to the second through hole;

[0011] When the connection between the connection end of the connection part and the clamping part is released, the clamping part moves away from the second through hole in the first through hole until the inner wall of the first through hole presses the clamping part against the outer periphery of the oil pipe.

[0012] In some specific embodiments, one end of the second through hole close to the first through hole communicates with the top of the first through hole;

[0013] The inner diameter of the bottom of the first through hole is smaller than the inner diameter of the top of the first through hole;

[0014] When the connection between the connection end of the connection part and the clamping part is released, the clamping part falls to the bottom of the first through hole and is squeezed by the inner wall of the bottom of the first through hole.

[0015] In some specific embodiments, there are multiple second through holes, and the multiple second through holes are evenly distributed circumferentially around the first through hole;

[0016] There are multiple connection parts, and the multiple connection parts are arranged in one-to-one correspondence with the multiple second through holes.

[0017] In some specific embodiments, the second through hole is arranged in the radial direction of the first through hole.

[0018] In some specific embodiments, the mounting part includes:

[0019] A mounting post, and the mounting seat is coaxially installed on the wellhead;

[0020] The first through hole is axially opened in the middle of the mounting post along the axis of the mounting post;

[0021] The second through hole is radially opened on one side of the mounting post along the radial direction of the mounting post.

[0022] In some specific embodiments, the mounting post is a conversion flange.

[0023] In some specific embodiments, the clamping part is a slip, the slip is arranged around the outer periphery of the oil pipe circumferentially, and the outer wall of the slip is connected to the connection ends of the multiple connection parts;

[0024] A plurality of tensioning structures are arranged on the slip, and the slip can expand or contract radially along the oil pipe through the tensioning structures.

[0025] In some specific embodiments, a plurality of insertion slots are formed on the outer wall of the slip, and the plurality of insertion slots correspond one by one to the connection ends of the plurality of connection parts, and the connection ends of the connection parts are inserted into the corresponding insertion slots.

[0026] In some specific embodiments, the plurality of tensioning structures are evenly distributed, and each tensioning structure is respectively located between the connection ends of every two adjacent connection parts.

[0027] In some specific embodiments, the inner wall of the first through hole is an inner arc-shaped structure, the outer wall of the slip is an outer arc-shaped structure, and the inner arc-shaped structure is adapted to the outer arc-shaped structure.

[0028] In some specific embodiments, the inner wall of the first through hole is an inner stepped structure to form a plurality of abutting platforms along the axial direction of the first through hole on the inner wall of the first through hole;

[0029] The outer wall of the slip can abut against the plurality of abutting platforms in sequence.

[0030] In some specific embodiments, the connection part includes:

[0031] A moving component, the moving component is movably arranged in the second through hole, and one end of the moving component close to the first through hole forms the connection end of the connection part;

[0032] A sealing component, the sealing component is arranged circumferentially around the second through hole between the outer wall of the moving component and the inner wall of the second through hole.

[0033] In some specific embodiments, the moving component includes:

[0034] A movable rod, one end of the movable rod is movably inserted into the second through hole and connected to the clamping part, and the other end of the movable rod extends to the outside of the installation part in a direction away from the first through hole.

[0035] In some specific embodiments, the moving component further includes:

[0036] A threaded sleeve, the threaded sleeve is arranged circumferentially around the second through hole in the second through hole, and the movable rod is threadedly inserted through the threaded sleeve.

[0037] In some specific embodiments, a connecting rod is arranged at one end of the movable rod close to the first through hole;

[0038] One end of the connecting rod away from the movable rod is inserted into the outer wall of the clamping part.

[0039] In some specific embodiments, one end of the connecting rod inserted on the outer wall of the clamping portion is fixedly connected to the outer wall of the clamping portion;

[0040] The outer diameter of the connecting rod is smaller than the outer diameter of the movable rod.

[0041] In some specific embodiments, a stepped structure is provided on the inner wall of one end of the second through hole close to the first through hole, and the stepped structure and one end of the threaded sleeve close to the first through hole enclose a sealing groove;

[0042] The sealing assembly is circumferentially arranged around the second through hole in the sealing groove.

[0043] In some specific embodiments, the sealing assembly includes:

[0044] A first pressing cap, a sealing ring and a second pressing cap which are sequentially abutted along the axial direction of the second through hole;

[0045] The first pressing cap, the sealing ring and the second pressing cap are all circumferentially arranged around the second through hole in the sealing groove;

[0046] One end of the first pressing cap abuts against one end of the threaded sleeve close to the first through hole.

[0047] In some specific embodiments, the outer wall of the threaded sleeve is threadedly connected to the inner wall of the second through hole, and the threaded sleeve can move axially along the second through hole in a direction close to or away from the first through hole.

[0048] In some specific embodiments, one end of the threaded sleeve away from the first through hole extends axially away from the first through hole to the outside of the mounting portion.

[0049] A tubing hanging method based on the same concept, using the integrated hanging device described in any of the above specific embodiments, includes the following steps:

[0050] The mounting portion is installed on the wellhead, so that the first through hole of the mounting portion is coaxially arranged with the wellhead, and the tubing passes through the first through hole and penetrates into the wellhead;

[0051] Drive the connecting portion to move in a direction away from the first through hole to release the connection between the connecting portion and the clamping portion;

[0052] After the connection is released, the clamping portion moves along the direction of the first through hole, and the inner wall of the first through hole presses the clamping portion, so that the clamping portion contracts in a direction close to the tubing to clamp the tubing.

[0053] The integrated suspension device of the present invention enables an oil pipe to pass through a wellhead through a first through-hole of an installation part. Under the action of a connecting part disposed in a second through-hole communicating with the first through-hole, a clamping part can be disposed around the outer periphery of the oil pipe in the first through-hole, so that the clamping part can form an integrated structure with the installation part through the connecting part. When the connecting part is driven to move away from the first through-hole, the connection between the connecting part and the clamping part is released, enabling the clamping part to move integrally in the first through-hole, and the inner wall of the first through-hole squeezes the clamping part towards the oil pipe, so that the clamping part clamps the oil pipe to complete the suspension of the oil pipe. This replaces the original method of setting split-type clamping tiles, enabling each part of the clamping part to remain at the same horizontal height, avoiding affecting the clamping effect on the oil pipe, improving the stability of the oil pipe suspension, and moreover, no longer requiring the disassembly and lifting of external connection tools to complete the suspension operation of the oil pipe, reducing the operation process steps, improving the operation process efficiency, and avoiding safety risks during the oil pipe suspension process.

[0054] The oil pipe suspension method of the present invention adopts the above-mentioned integrated suspension device, so it has the same beneficial effects as the above-mentioned integrated suspension device. Therefore, it will not be elaborated here again.

[0055] Other features and advantages of the present invention will be described in the subsequent description, and some of them will become obvious from the description or can be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0057] Figure 1 Shows a schematic diagram of the integrated suspension device in an embodiment of the present invention;

[0058] Figure 2 Shows a schematic diagram of the clamping part in an embodiment of the present invention;

[0059] Figure 3 Shows a top view of the clamping part in an embodiment of the present invention;

[0060] Figure 4 Shows a bottom view of the clamping part in an embodiment of the present invention;

[0061] Figure 5Shows a schematic diagram of the tensioning structure in an embodiment of the present invention;

[0062] Figure 6 is Figure 2 an enlarged view of A of;

[0063] Figure 7 Shows another schematic diagram of the integral suspension device in an embodiment of the present invention;

[0064] Figure 8 Shows a simulation diagram when the clamping part in an embodiment of the present invention contacts the outer wall of the oil pipe;

[0065] Figure 9 Shows a theoretical comparison diagram of the third strength theory and the fourth strength theory in an embodiment of the present invention;

[0066] Figure 10 Shows a simulation analysis diagram of the Mises stress of the oil pipe in an embodiment of the present invention;

[0067] Figure 11a Shows a simulation diagram of the finite element model in an embodiment of the present invention;

[0068] Figure 11b Shows a structural analysis diagram of the tooth profile in an embodiment of the present invention;

[0069] Figure 11c Shows a structural analysis diagram of the tooth profile of another specification in an embodiment of the present invention;

[0070] Figure 12 Shows a logical schematic diagram of the parameter design method of the tooth profile of the slip in an embodiment of the present invention;

[0071] Figure 13 Shows a flowchart of the oil pipe suspension method in an embodiment of the present invention.

[0072] In the figure, 100 is the installation part; 110 is the abutting platform; 200 is the connecting part; 210 is the moving component; 211 is the movable rod; 212 is the threaded sleeve; 213 is the connecting rod; 220 is the sealing component; 221 is the first compression cap; 222 is the sealing ring; 223 is the second compression cap; 300 is the clamping part; 310 is the slip piece; 311 is the insertion slot; 320 is the tensioning structure; 321 is the upper separation groove; 322 is the lower separation groove. Detailed implementation manners

[0073] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0074] Referring to Figure 1 , the present invention provides an integrated suspension device, including: a mounting portion 100, a connecting portion 200, and a clamping portion 300. A first through hole for the coaxial passage of an oil pipe is provided in the mounting portion 100. A second through hole is further provided in the mounting portion 100. One end of the second through hole faces the first through hole and communicates with the first through hole. The connecting portion 200 is movably disposed in the second through hole, and the connecting end of the connecting portion 200 faces the first through hole. The clamping portion 300 is disposed around the circumference of the oil pipe in the first through hole and is connected to the connecting end of the connecting portion 200. When the connecting portion 200 moves in a direction away from the first through hole, the connection between the connecting end of the connecting portion 200 and the clamping portion 300 is released. The inner diameter dimension of the end of the first through hole away from the second through hole is smaller than the inner diameter dimension of the end of the first through hole close to the second through hole. When the connection between the connecting end of the connecting portion 200 and the clamping portion 300 is released, the clamping portion 300 moves in the first through hole in a direction away from the second through hole until the inner wall of the first through hole presses the clamping portion 300 against the outer circumference of the oil pipe.

[0075] Specifically, the installation part 100 is installed above the wellhead. The wellhead can be blocked through the installation part 100. Among them, the first through hole is axially opened on the installation part 100 along the wellhead for the oil pipe to pass through coaxially, so that the oil pipe can pass through the first through hole and reach the well. The second through hole is opened on one side of the installation part 100, so that the second through hole is located on one side of the first through hole, and one end of the second through hole faces the first through hole and is communicated with the first through hole. The connecting part 200 is arranged in the second through hole, and one end of the connecting part 200 faces the first through hole through the second through hole. The clamping part 300 is arranged around the circumference of the oil pipe and disposed on the outer periphery of the oil pipe, so that the clamping part 300 is located between the outer wall of the oil pipe and the inner wall of the first through hole. Among them, the clamping part 300 is connected to one end of the connecting part 200 facing the first through hole. Thus, the setting of the clamping part 300 can be fixed through the connecting part 200, and the clamping part 300 and the installation part 100 form an integral structure through the connecting part 200. The connecting part 200 is movably connected to the second through hole, so that the connecting part 200 can move in the second through hole in a direction close to or away from the first through hole. When the connecting part 200 is connected to the clamping part 300, the connecting part 200 is at its position closest to the first through hole at this time. When the connecting part 200 is driven to move a preset distance in a direction away from the first through hole, one end of the connecting part 200 facing the first through hole will also move a preset distance in a direction away from the first through hole, so that the connection between the connecting part 200 and the clamping part 300 is released, thus stopping the fixing effect of the connecting part 200 on the setting position of the clamping part 300, so that the released clamping part 300 can move integrally in the first through hole. Moreover, the inner diameter of the inner wall of the first through hole gradually decreases from the position close to the second through hole to the position far from the second through hole. Thus, the decrease in the inner diameter of the inner wall of the first through hole can abut against the outer wall of the clamping part 300 and gradually squeeze the clamping part 300, restricting the clamping part 300 from shrinking towards the oil pipe until the clamping part 300 is pressed against the outer periphery of the oil pipe, thus facilitating the clamping and suspension of the oil pipe by the clamping part 300. It replaces the original method of setting the split-type clamping tiles 310, enables each part of the clamping part 300 to maintain the same horizontal height, and still enables each part of the clamping part 300 to be basically at the same horizontal height after the oil pipe is clamped, greatly reducing the influence on the clamping effect of the oil pipe and improving the stability of the oil pipe suspension. Moreover, there is no need to disassemble and lift the external connection tool, and only by driving the connecting part 200 to move, the suspension operation of the oil pipe can be completed. While ensuring the suspension stability, the process steps of the oil pipe suspension operation are reduced, the process efficiency of the oil pipe suspension operation is improved, and when the oil pipe suspension operation is carried out, it is possible to avoid always hoisting heavy objects above the heads of the operators, avoiding the safety risks during the oil pipe suspension process.

[0076] In some specific embodiments of the present invention, with reference toFigure 1 , one end of the second through hole close to the first through hole communicates with the top of the first through hole. The inner diameter dimension of the bottom of the first through hole is smaller than the inner diameter dimension of the top of the first through hole. When the connection between the connection end of the connecting portion 200 and the clamping portion 300 is released, the clamping portion 300 can fall to the bottom of the first through hole and be squeezed by the inner wall of the bottom of the first through hole.

[0077] Specifically, one end of the second through hole close to the first through hole, that is, the end of the second through hole facing the first through hole, communicates with the top of the first through hole. Thus, after the connecting portion 200 in the second through hole is connected to the clamping portion 300, the clamping portion 300 can be fixedly arranged at the top in the first through hole. When the connection between the connecting portion 200 and the clamping portion 300 is released, the clamping portion 300 can fall towards the bottom of the first through hole under its own gravity. Among them, the inner diameter dimension of the bottom of the first through hole is smaller than the inner diameter dimension of the top of the first through hole, and the inner diameter dimension of the bottom of the first through hole is less than or equal to the outer diameter dimension of the clamping portion 300 in the contracted state, while the inner diameter dimension of the top of the first through hole is greater than or equal to the outer diameter dimension of the clamping portion 300 in the non-contracted state. When the connecting portion 200 is connected to the clamping portion 300 or at the moment when the connection between the connecting portion 200 and the clamping portion 300 is released, the clamping portion 300 is located at the top of the first through hole, and the inner wall of the first through hole abuts against the outer wall of the clamping portion 300 in the non-contracted state or there is a gap. As the clamping portion 300 falls from the top of the first through hole to the bottom of the first through hole, the inner diameter of the first through hole gradually decreases, so that the inner wall of the first through hole abuts against the outer wall of the clamping portion 300 and gradually increases the squeezing force on the clamping portion 300, thereby driving the clamping portion 300 to contract towards the direction close to the oil pipe until the clamping portion 300 becomes in the contracted state. When the clamping portion 300 is in the contracted state, the inner wall of the clamping portion 300 abuts against the outer wall of the oil pipe and squeezes the outer wall of the oil pipe, thereby increasing the friction between the clamping portion 300 and the oil pipe, enabling the relative position between the oil pipe and the clamping portion 300 to be fixed under the action of the friction force, so as to complete the hanging operation of the oil pipe. The structure is simple and easy to set. Only by driving the movement of the connecting portion 200 can the hanging operation of the oil pipe be completed, reducing the process steps of the oil pipe hanging operation, improving the process efficiency of the oil pipe hanging operation, and when performing the oil pipe hanging operation, it can avoid always hoisting heavy objects above the operator's head, avoiding the safety risks during the oil pipe hanging process.

[0078] In some specific embodiments of the present invention, referring to Figure 1 , there are multiple second through holes, and the multiple second through holes are evenly distributed around the circumference of the first through hole. There are multiple connecting portions 200, and the multiple connecting portions 200 are arranged in one-to-one correspondence with the multiple second through holes.

[0079] Specifically, a plurality of second through holes are evenly distributed on the mounting part 100, such that the plurality of second through holes are evenly distributed circumferentially around the first through hole, and the plurality of second through holes are all connected to the top of the first through hole. A plurality of connecting parts 200 are respectively arranged in the plurality of second through holes. Each connecting part 200 can be connected to the clamping part 300 through one end of the second through hole communicating with the first through hole, and each connecting part 200 can also move along the axial direction of the corresponding second through hole away from the first through hole. When the plurality of connecting parts 200 are all in the position closest to the first through hole, the plurality of connecting parts 200 are respectively connected to a plurality of parts of the clamping part 300, thereby improving the fixing stability of the clamping part 300. When the plurality of connecting parts 200 all move along the axial direction of the corresponding second through hole away from the first through hole, the connection between the plurality of connecting parts 200 and the clamping part 300 can be released. By simultaneously driving the plurality of connecting parts 200 to move along the axial direction of the corresponding second through hole away from the first through hole, the connection between the plurality of parts of the clamping part 300 and the plurality of connecting parts 200 can be simultaneously released, so that the plurality of parts of the clamping part 300 can fall simultaneously, keeping the plurality of parts of the clamping part 300 at the same horizontal height, ensuring the falling stability of the clamping part 300, avoiding height differences after the clamping part 300 falls, and improving the hanging stability of the oil pipe.

[0080] In some specific embodiments of the present invention, referring to Figure 1 , the second through hole is arranged along the radial direction of the first through hole. Specifically, the first through hole is vertically opened, and the second through hole is horizontally opened, such that the second through hole can be arranged along the radial direction of the first through hole, thereby avoiding jamming when driving the connecting part 200 to move away from the first through hole along the axial direction of the second through hole, and ensuring smooth movement of the connecting part 200. Moreover, this setting form is relatively simple to process, can save costs, and is convenient for installation and setting of components.

[0081] In some specific embodiments of the present invention, referring to Figure 1 , the mounting part 100 includes: a mounting column. The mounting seat is coaxially installed on the wellhead. The first through hole is axially opened in the middle of the mounting column along the axial direction of the mounting column. The second through hole is radially opened on one side of the mounting column along the radial direction of the mounting column. Specifically, the mounting column is fixedly placed above the wellhead, and the bottom surface of the mounting column is in contact with the end of the wellhead, making the axis of the mounting column collinear with the axis of the wellhead. Among them, the first through hole is axially opened along the mounting column, so that the first through hole can also be axially opened along the wellhead. The second through hole is radially opened along the mounting column, so that the second through hole can also be radially opened along the wellhead. This setting form is relatively simple to process, can save costs, and is convenient for installation and setting of components.

[0082] In some specific embodiments of the present invention, referring to Figure 1, the installation column is a conversion flange. A first through hole of the installation column is formed by the middle pipe of the conversion flange, and a second through hole of the installation column is formed by radially opening holes on the conversion flange along the radial direction of the conversion flange. It is convenient for processing, installation and setting, and saves costs.

[0083] In some specific embodiments of the present invention, referring to Figure 2 , the clamping part 300 is a slip. The slip is arranged around the outer circumference of the oil pipe in the circumferential direction of the oil pipe, and the outer wall of the slip is connected to the connection ends of the plurality of connecting parts 200. A plurality of tensioning structures 320 are arranged on the slip, and the slip can expand or contract radially along the oil pipe through the tensioning structures 320. Specifically, the clamping part 300 is a slip, and the slip is a cylindrical structure, so that the slip can be arranged around the outer circumference of the oil pipe in the circumferential direction of the oil pipe. The outer wall of the slip is respectively connected to one end of the plurality of connecting parts 200 facing the first through hole, so as to realize the setting and fixing of the slip. Among them, a plurality of tensioning structures 320 are arranged on the slip, and the tensioning structures 320 have elasticity. When the slip is not squeezed, that is, when the slip is connected to the plurality of connecting parts 200, the elastic force of the tensioning structures 320 can drive the slip to expand, so as to avoid the slip from rubbing the outer wall of the oil pipe. At the same time, through the tensioning structures 320, when the slip is squeezed, that is, when the connection between the slip and the plurality of connecting parts 200 is released and the slip is squeezed by the inner wall of the first through hole, the elastic force of the tensioning structures 320 can reserve space for the contraction of the slip.

[0084] Furthermore, the slip includes a plurality of slip pieces 310. The plurality of slip pieces 310 can cooperate with each other to be arranged around the circumferential direction of the oil pipe so as to be arranged around the outer circumference of the oil pipe. The plurality of slip pieces 310 and the plurality of connecting parts 200 are arranged in one-to-one correspondence. The connection end of each connecting part 200 is respectively connected to the outer wall of the corresponding slip piece 310. The setting positions of the plurality of slip pieces 310 can be fixed respectively through the plurality of connecting parts 200, ensuring the setting stability of each slip piece 310. And, keeping the plurality of slip pieces 310 at the same horizontal height can make the plurality of slip pieces 310 fall at the same horizontal height, ensuring the falling stability between the plurality of slip pieces 310, reducing the probability of generating height differences between the plurality of slip pieces 310 after falling, and further improving the hanging stability of the oil pipe.

[0085] In some specific embodiments of the present invention, referring to Figure 2 , a plurality of insertion slots 311 are opened on the outer wall of the slip. The plurality of insertion slots 311 correspond to the connection ends of the plurality of connecting parts 200 one by one, and the connection ends of the connecting parts 200 are inserted into the corresponding insertion slots 311. Specifically, referring to Figure 3, a plurality of insertion slots 311 are arranged in one-to-one correspondence with a plurality of clamping tiles 310. Each insertion slot 311 is formed on the outer wall of the corresponding clamping tile 310, and the plurality of insertion slots 311 are in one-to-one correspondence with the connection ends of the plurality of connection parts 200, so as to improve that the plurality of connection parts 200 can be respectively connected to the corresponding clamping tiles 310 through the corresponding insertion slots 311. The connection end of the connection part 200, that is, the end of the connection part 200 close to the first through hole, is inserted into the insertion slot 311 on the outer wall of the corresponding clamping tile 310. Thus, by inserting the connection ends of the plurality of connection parts 200 into the corresponding insertion slots 311 respectively, the setting and fixing of the clamping part 300, that is, the clamping tile surrounded by the plurality of clamping tiles 310, can be realized.

[0086] Further, the connection end of the connection part 200 is fixedly inserted and connected with the insertion slot 311. When it is necessary to release the connection relationship between the connection part 200 and the clamping tile, by driving the connection part 200 to move away from the first through hole along the second through hole, the part of the connection end of the connection part 200 fixedly inserted and connected with the insertion slot 311 can be broken, so as to release the connection relationship between the connection part 200 and the clamping tile. Ensure the stable connection between the connection part 200 and the clamping tile, and avoid the unauthorized disconnection between the connection part 200 and the clamping tile before starting to release the connection relationship between the connection part 200 and the clamping tile.

[0087] Further, the connection part 200 is rotatably connected with the second through hole, so that the connection part 200 can be driven to rotate around the circumference of the second through hole. Thus, when driving the connection part 200 to move away from the first through hole along the second through hole, a rotational force can be applied to the part of the connection end of the connection part 200 fixedly inserted and connected with the insertion slot 311, so as to twist off the part of the connection end of the connection part 200 fixedly inserted and connected with the insertion slot 311, which is more labor-saving and convenient for releasing the connection relationship between the connection part 200 and the clamping tile.

[0088] In some specific embodiments of the present invention, refer to Figure 3 , the plurality of tensioning structures 320 are evenly distributed. Each tensioning structure 320 is respectively located between the connection ends of every two adjacent connection parts 200. Specifically, the plurality of tensioning structures 320 are respectively arranged between every two adjacent clamping tiles 310, that is, every two adjacent clamping tiles 310 are connected by one of the tensioning structures 320. Under the combined action of the plurality of tensioning structures 320, the plurality of clamping tiles 310 can be contracted in the radial direction of the oil pipe by squeezing the clamping tiles 310.

[0089] Further, the adjacent sides between every two adjacent clamping tiles 310 are fixedly connected. Refer to Figure 4 , a plurality of lower separation slots 322 are axially formed at the bottom of the junction of every two adjacent clamping tiles 310 along the axial direction of the oil pipe. Refer to Figure 3, at the top of the junction of every two adjacent card tiles 310, a plurality of upper separation grooves 321 are axially formed along the oil pipe, where, referring to Figure 5 , the plurality of upper separation grooves 321 are respectively located between every two adjacent lower separation grooves 322, so as to form a tension structure 320 through the plurality of upper separation grooves 321 and the plurality of lower separation grooves 322. Moreover, by forming the tension structure 320 in the form of the upper separation grooves 321 and the lower separation grooves 322 among the plurality of card tiles 310, it can be ensured that the plurality of card tiles 310 are at the same horizontal height, and after the slips fall, it can still be ensured that the plurality of card tiles 310 are at the same horizontal height, avoiding the situation of height difference among the plurality of card tiles 310, enabling the slips to uniformly receive the extrusion force and contract, thereby ensuring the clamping effect of the slips on the oil pipe and improving the stability during the hanging of the oil pipe.

[0090] Furthermore, there are three lower separation grooves 322 and two upper separation grooves 321, and the two upper separation grooves 321 are respectively located between every two adjacent ones of the three lower separation grooves 322. It can not only ensure that there is sufficient space for expansion and contraction in the radial direction of the oil pipe among the plurality of card tiles 310, but also ensure the firm connection among the plurality of card tiles 310.

[0091] In some specific embodiments of the present invention, referring to Figure 1 , the inner wall of the first through hole is an inner arc structure, and the outer wall of the slip is an outer arc structure, and the inner arc structure and the outer arc structure are adapted to each other. Specifically, the outer wall of the card tile 310 is an outer arc structure with an outer diameter gradually decreasing from the top to the bottom of the card tile 310, and the inner wall of the first through hole is an inner arc structure with an inner diameter gradually decreasing from the top to the bottom of the first through hole. The outer arc structure and the inner arc structure are adapted to each other, so as to facilitate the smooth falling of the slip formed by the card tiles 310 in the first through hole after the connection between the connecting part 200 and the slip is released, and also facilitate the inner wall of the first through hole to extrude the card tile 310.

[0092] Furthermore, the arc angles of the outer arc structure and the inner arc structure are 8 degrees, which can ensure the smooth falling of the slip while enabling the inner wall of the first through hole to radially extrude the card tile 310 along the oil pipe, avoiding deviation in the contraction direction of the slip.

[0093] In some specific embodiments of the present invention, referring to Figure 7, the inner wall of the first through hole is an inner stepped structure to form a plurality of abutment platforms 110 along the axial direction of the first through hole on the inner wall of the first through hole. The outer wall of the slip can sequentially abut against the plurality of abutment platforms 110. Specifically, a plurality of abutment platforms 110 are sequentially formed on the inner wall of the first through hole from top to bottom, and each abutment platform 110 is arranged around the axial direction of the first through hole. Moreover, the inner diameters of the plurality of abutment platforms 110 gradually decrease from top to bottom. During the falling process of the slip, it will first contact the vertex angle of the first abutment platform 110, so as to squeeze the outer wall of the slip through the vertex angle of the first abutment platform 110, causing a contraction movement between the plurality of slip segments 310. When the outer diameter of the slip shrinks to be smaller than the inner diameter of the first abutment platform 110, the slip can continue to fall through the first abutment platform 110 until it contacts the vertex angle of the second abutment platform 110, and then squeeze the outer wall of the slip through the vertex angle of the second abutment platform 110. And so on. When the slip contacts the vertex angle of the last abutment platform 110, each slip segment 310 can be pressed against the outer periphery of the tubing through the vertex angle of the last abutment platform 110, thereby completing the clamping and fixing of the tubing by the slip. When squeezing the slip, the slip only contacts the vertex angle of the abutment platform 110, so that the squeezing force on the slip can be increased by reducing the contact area, and further the stability of the clamping and fixing of the tubing by the slip can be ensured.

[0094] Further, referring to Figure 6 , a tooth profile with a serrated structure is arranged on the inner wall of the slip segment 310 along the axial direction of the tubing. When the inner wall of the slip segment 310 contacts the outer wall of the tubing, as the slip continues to contract, the tooth profile with the serrated structure on the inner wall of the slip segment 310 will gradually adhere to the outer wall of the tubing until the clamping of the tubing is completed. By arranging the serrated structure, the friction force between the inner wall of the slip segment 310 and the outer wall of the tubing can be increased, thereby improving the clamping stability of the tubing.

[0095] Further, the design of the tooth profile of the serrated structure incorporates the requirements of downhole high-power electrothermal processes and refers to Figure 8 , and according to the simulation of the forces on the tubing, a mechanical model suitable for the forces on the tubing is correspondingly established;

[0096] The mechanical model of the forces on the tubing includes:

[0097] First, the weight of the tubing is obtained through the following formula:

[0098] Q = qL

[0099] where Q is the weight of the tubing, q is the density of the tubing, and L is the running-in depth of the tubing.

[0100] Second, the radial load when the integral suspension device contacts the tubing is obtained through the following formula:

[0101]

[0102] Among them, F is the radial load when the integral hanging device contacts the tubing, α is the slip cone angle of the integral hanging device, and φ is the friction angle between the slip of the integral hanging device and the tubing.

[0103] Third, obtain the contact stress at the anchoring position of the tubing through the following formula:

[0104]

[0105] Among them, σ r is the contact stress at the anchoring position of the tubing, R2 is the outer diameter of the tubing, h is the anchoring depth of the tooth profile of the slip, and β is the angle of the tooth profile of the slip of the integral hanging device.

[0106] Fourth, obtain the tensile stress at the anchoring position of the tubing through the following formula:

[0107]

[0108] Among them, σ l is the tensile stress at the anchoring position of the tubing, and R1 is the inner diameter of the tubing.

[0109] Finally, obtain the circumferential stress generated when the tubing at the anchoring position bears internal pressure through the following formula:

[0110]

[0111] Among them, σ θ is the circumferential stress generated when the tubing at the anchoring position bears internal pressure, P1 is the internal pressure borne by the tubing, and P2 is the external pressure borne by the tubing.

[0112] The design of the tooth profile of the sawtooth structure needs to meet the requirements of the above various formulas;

[0113] At the same time, the design of the tooth profile of the sawtooth structure also needs to meet the existing fourth strength theory. Referring to Figure 9 , the theoretically designed tensile limit load of the slip effect based on the fourth strength theory and the third strength theory when the half cone angle of the tooth profile is the same is compared. It can be seen that the tensile limit load of the slip effect of the tooth profile of the sawtooth structure designed based on the fourth strength theory is higher than that of the tooth profile of the sawtooth structure designed based on the third strength theory.

[0114] Referring to Figure 10 , before determining the design parameters of the tooth profile based on the sawtooth structure, it is necessary to conduct a simulation analysis based on the fourth strength theory to obtain the Mises (equivalent) stress of the tubing. At the same time, referring to Figure 11a , a corresponding finite element model can also be established. Referring toFigure 11b and Figure 11c , so that the structural analysis and comparison of the tooth profiles of slips with different specifications can be carried out, and then based on the final simulation analysis results, the design parameters of the tooth profiles of the slips can be verified, and then the design parameters of the tooth profiles of the slips can be determined to ensure low damage to the tubing.

[0115] Specifically, referring to Figure 12 , the parameter design method of the tooth profile of the slip includes the following steps:

[0116] According to the running-in depth of the tubing, obtain the weight of the tubing.

[0117] Preset the tooth profile parameters of the slip, and according to the tooth profile parameters of the slip, combined with the weight of the tubing, obtain the radial load when the integral hanging device contacts the tubing. Then, according to the radial load when the integral hanging device contacts the tubing, obtain the contact stress at the anchoring place of the tubing.

[0118] At the same time, according to the weight of the tubing, the tensile stress at the anchoring place of the tubing, and according to the pressure-bearing condition of the tubing, obtain the circumferential stress generated when the anchoring place of the tubing bears the internal pressure.

[0119] According to the obtained contact stress at the anchoring place of the tubing, the tensile stress at the anchoring place of the tubing, and the circumferential stress generated when the anchoring place of the tubing bears the internal pressure, and based on the fourth strength theory, obtain the equivalent stress of the tubing.

[0120] By comparing the equivalent stress of the tubing with the preset allowable tensile stress of the tubing, when the equivalent stress of the tubing meets the requirements of the preset allowable tensile stress of the tubing, the preset tooth profile parameters of the slip can be used as the determined parameter results. When the equivalent stress of the tubing does not meet the requirements of the preset allowable tensile stress of the tubing, the tooth profile parameters of the slip are reset and the above steps are repeated until the equivalent stress of the tubing meets the requirements of the preset allowable tensile stress of the tubing.

[0121] Through the parameter design method of the tooth profile of the slip, it can be determined that while the integral hanging device meets the anchoring requirements, the tubing is not damaged.

[0122] In some specific embodiments of the present invention, referring to Figure 1 , the connecting portion 200 includes: a moving component 210 and a sealing component 220. The moving component 210 is movably disposed in the second through hole, and one end of the moving component 210 close to the first through hole forms the connecting end of the connecting portion 200. The sealing component 220 is disposed circumferentially around the second through hole between the outer wall of the moving component 210 and the inner wall of the second through hole.

[0123] Specifically, the moving component 210 is disposed within the second through hole, and the moving component 210 is movably connected to the second through hole, such that the moving component 210 can be driven to move along the axial direction of the second through hole towards or away from the first through hole. The sealing component 220 is disposed circumferentially around the second through hole and is located between the outer wall of the moving component 210 and the inner wall of the second through hole, that is, the outer wall of the moving component 210 can be movably connected to the inner wall of the second through hole through the sealing component 220, so that the sealing component 220 can seal the gap between the outer wall of the moving component 210 and the inner wall of the second through hole, thereby preventing the gap between the outer space of the oil pipe, i.e., the outside of the oil pipe, and the inner wall of the first through hole from leaking through the gap between the inner wall of the second through hole and the outer wall of the moving component 210.

[0124] In some specific embodiments of the present invention, referring to Figure 1 , the moving component 210 includes: a movable rod 211. One end of the movable rod 211 is movably inserted into the second through hole and is connected to the clamping portion 300, and the other end of the movable rod 211 extends in a direction away from the first through hole to the outside of the mounting portion 100. Specifically, one end of the movable rod 211 is movably inserted into the second through hole and extends in a direction towards the first through hole until it is fixedly inserted into the insertion slot 311 of the corresponding clamping tile 310. The other end of the movable rod 211 extends along the axial direction of the second through hole in a direction away from the first through hole to the outside of the end of the second through hole away from the first through hole. By the end of the movable rod 211 extending to the outside of the second through hole, it is convenient for the operator to drive the movable rod 211 to move within the second through hole.

[0125] In some specific embodiments of the present invention, referring to Figure 1 , the moving component 210 further includes: a threaded sleeve 212. The threaded sleeve 212 is disposed circumferentially around the second through hole within the second through hole, and the movable rod 211 is threadedly inserted through the threaded sleeve 212. Specifically, the threaded sleeve 212 has a cylindrical structure, and one end of the threaded sleeve 212 is inserted into the second through hole along the axial direction of the second through hole from the end of the second through hole away from the first through hole, and the threaded sleeve 212 is coaxially disposed with the second through hole. Among them, the inner wall of the threaded sleeve 212 is provided with internal threads, and the outer wall of the movable rod 211 is provided with external threads adapted to the internal threads of the threaded sleeve 212, such that the movable rod 211 can be inserted through the threaded sleeve 212 and is threadedly connected to the threaded sleeve 212. Through the threaded connection relationship between the threaded sleeve 212 and the movable rod 211, a stepped sealing structure can be formed between the movable rod 211 and the threaded sleeve 212, thereby enhancing the sealing performance. Moreover, for the threadedly connected movable rod 211 and threaded sleeve 212, the relative position between the movable rod 211 and the threaded sleeve 212 can be adjusted by rotating the movable rod 211, thereby realizing the movement of the movable rod 211 within the second through hole, and the movable rod 211 can also be driven to rotate relative to the second through hole, which is convenient for breaking the connection between the movable rod 211 and the clamping tile 310.

[0126] In some specific embodiments of the present invention, referring to Figure 1 , a connecting rod 213 is provided at one end of the movable rod 211 close to the first through hole. One end of the connecting rod 213 away from the movable rod 211 is inserted into the outer wall of the clamping portion 300. Specifically, one end of the connecting rod 213 is fixedly connected to one end of the movable rod 211 close to the first through hole, and the other end of the connecting rod 213 is inserted into the insertion slot 311 of the corresponding clamping tile 310. The connecting rod 213 and the movable rod 211 are coaxially arranged, and when the movable rod 211 rotates, it can drive the connecting rod 213 to rotate together. Through the connection arrangement of the connecting rod 213 and the movable rod 211, the position where it is broken can be limited within the range of the connecting rod 213 when the movable rod 211 rotates, thereby avoiding damaging the movable rod 211 itself and preventing the damaged movable rod 211 from getting stuck in the second through hole.

[0127] In some specific embodiments of the present invention, referring to Figure 1 , one end of the connecting rod 213 inserted into the outer wall of the clamping portion 300 is fixedly connected to the outer wall of the clamping portion 300. The outer diameter dimension of the connecting rod 213 is smaller than the outer diameter dimension of the movable rod 211. Specifically, one end of the connecting rod 213 inserted into the corresponding insertion slot 311 is fixedly connected to the insertion slot 311, and the outer diameter dimension of the connecting rod 213 is smaller than the outer diameter dimension of the movable rod 211, which can further facilitate breaking the connecting rod 213, thereby further limiting the position where it is broken within the range of the connecting rod 213, greatly reducing the probability of damaging the movable rod 211 itself and preventing the damaged movable rod 211 from getting stuck in the second through hole.

[0128] In some specific embodiments of the present invention, referring to Figure 1 , a stepped structure is provided on the inner wall of the second through hole close to the first through hole. The stepped structure and one end of the threaded sleeve 212 close to the first through hole enclose a sealing groove. The sealing assembly 220 is arranged circumferentially around the second through hole in the sealing groove. Specifically, the inner wall of the second through hole close to the first through hole extends towards the direction close to the axis of the second through hole, so as to form a stepped structure on the inner wall of the second through hole close to the first through hole. There is a gap between the stepped structure and the end face of the threaded sleeve 212 close to the first through hole, so that the stepped structure and one end of the threaded sleeve 212 close to the first through hole can enclose a sealing groove. The sealing assembly 220 is arranged circumferentially around the second through hole in the sealing groove, which is convenient for arranging the sealing assembly 220 and can form a stepped sealing structure around the movable rod 211 at one end of the second through hole close to the first through hole, thereby further improving the sealing performance.

[0129] In some specific embodiments of the present invention, referring to Figure 1, the sealing assembly 220 includes: a first compression cap 221, a sealing ring 222, and a second compression cap 223 that are sequentially abutted along the axial direction of the second through-hole. The first compression cap 221, the sealing ring 222, and the second compression cap 223 are all circumferentially arranged in the sealing groove around the second through-hole. One end of the first compression cap 221 abuts against one end of the threaded sleeve 212 close to the first through-hole. Specifically, the first compression cap 221, the sealing ring 222, and the second compression cap 223 are all arranged in the sealing groove around the outer periphery of the movable rod 211. Among them, one end of the first compression cap 221 abuts against one end of the threaded sleeve 212 close to the first through-hole, one end of the sealing ring 222 abuts against the end of the first compression cap 221 away from the threaded sleeve 212, one end of the second compression cap 223 abuts against the end of the sealing ring 222 away from the threaded sleeve 212, and the other end of the second compression cap 223 abuts against the stepped structure on the inner wall of the second through-hole close to one end of the first through-hole. Through the mutual abutting relationship between the components, the existence of gaps can be reduced, the sealing performance can be improved, and moreover, the first compression cap 221 and the second compression cap 223 can squeeze the sealing ring 222 located between the first compression cap 221 and the second compression cap 223, so that the sealing ring 222 undergoes initial deformation, and further seals the gap, ensuring the sealing performance.

[0130] In some specific embodiments of the present invention, referring to Figure 1 , the outer wall of the threaded sleeve 212 is threadedly connected to the inner wall of the second through-hole, and the threaded sleeve 212 can move along the axial direction of the second through-hole towards or away from the first through-hole. Specifically, the outer wall of the threaded sleeve 212 and the inner wall of the second through-hole are provided with mutually adapted external threads and internal threads, so that a threaded connection relationship is also formed between the threaded sleeve 212 and the second through-hole, and the threaded sleeve 212 can be driven to move along the axial direction of the second through-hole towards the first through-hole or away from the first through-hole by rotating the threaded sleeve 212. First, when driving the threaded sleeve 212 to move along the axial direction of the second through-hole towards the first through-hole, the first compression cap 221 can be pushed by the threaded sleeve 212, and the sealing ring 222 can be further squeezed, so that the sealing ring 222 undergoes further deformation, thereby ensuring the sealing performance. Second, after the sealing ring 222 is squeezed and deformed, the deformed sealing ring 222 can be arranged closely against the outer wall of the movable rod 211, so that the friction force between the sealing ring 222 and the movable rod 211 can be increased, thereby fixing the set position of the movable rod 211, avoiding the movable rod 211 from rotating easily due to misoperation, and ensuring the connection stability with the slip. At the same time, the threaded sleeve 212 and the second through-hole with a threaded connection can form a stepped sealing structure between the outer wall of the threaded sleeve 212 and the inner wall of the second through-hole, thereby further improving the sealing performance.

[0131] Furthermore, the inner wall of the threaded sleeve 212 and the outer wall of the movable rod 211 are connected in a forward threaded relationship. The outer wall of the threaded sleeve 212 and the inner wall of the second through hole are connected in a reverse threaded relationship. This can prevent the threaded sleeve 212 from rotating when the movable rod 211 is rotated, and can also prevent the movable rod 211 from easily rotating when the threaded sleeve 212 is rotated.

[0132] In some specific embodiments of the present invention, referring to Figure 1 , the end of the threaded sleeve 212 away from the first through hole extends to the outside of the mounting portion 100 along the axial direction of the second through hole in a direction away from the first through hole. Specifically, the end of the threaded sleeve 212 away from the first through hole extends to the outside of the end of the second through hole away from the first through hole along the axial direction of the second through hole in a direction away from the first through hole, and the end of the threaded sleeve 212 away from the first through hole does not extend to the position of the end of the movable rod 211 away from the first through hole, that is, the end of the threaded sleeve 212 away from the first through hole is located between the end of the movable rod 211 away from the first through hole and the end of the second through hole away from the first through hole. The threaded sleeve 212 extending to the outside of the end of the second through hole away from the first through hole facilitates the operator to rotate the threaded sleeve 212, and the threaded sleeve 212 located between the end of the movable rod 211 away from the first through hole and the end of the second through hole away from the first through hole can avoid affecting the operator's rotation of the movable rod 211.

[0133] Reference Figure 13 The present invention also provides a method for hanging an oil pipe, using the integrated hanging device as described in any of the above specific embodiments, comprising the following steps: the mounting part 100 is mounted on the wellhead, the first through hole of the mounting part 100 is coaxially arranged with the wellhead, and the oil pipe is passed through the first through hole into the wellhead. The connecting part 200 is driven to move in a direction away from the first through hole, so that the connection between the connecting part 200 and the clamping part 300 is released. After the connection is released, the clamping part 300 moves along the direction of the first through hole, and the inner wall of the first through hole squeezes the clamping part 300, so that the clamping part 300 shrinks in a direction close to the oil pipe to clamp the oil pipe.

[0134] Specifically, the installation column is fixedly placed above the wellhead, such that the first through hole of the installation column is coaxially arranged with the wellhead. The oil pipe is inserted into the well through the first through hole of the installation column and is disposed through the slip. The movable rod 211 is driven to drive the connecting rod 213 to rotate together. While the movable rod 211 drives the moving rod to rotate, it can also drive the moving rod away from the first through hole, thereby breaking the connecting rod 213 and releasing the connection between the movable rod 211 and the corresponding slip piece 310. After the connection is released, the slip formed by the slip pieces 310 falls along the first through hole under its own gravity until the outer arc structure of the outer wall of the slip piece 310 collides with the inner arc structure of the inner wall of the first through hole. The slip formed by the slip pieces 310 continues to fall along the first through hole under its own gravity, such that the inner arc structure of the inner wall of the first through hole exerts a squeezing force on the slip formed by the slip pieces 310 along the radial direction of the slip towards the direction close to the oil pipe, causing the plurality of slip pieces 310 to be further squeezed and approximated to each other through the tensioning structure 320, and further causing the slip to contract until the inner walls of the plurality of slip pieces 310 are in contact with and tightly attached to the outer wall of the oil pipe, thereby realizing the clamping and suspension of the oil pipe. By rotating the threaded sleeve 212, the threaded sleeve 212 moves towards the direction close to the first through hole, thereby fully squeezing the sealing ring 222 through the threaded sleeve 212 and the stepped step, such that the sealing ring 222 can be deformed due to the squeezing and fill the gap between the movable rod 211 and the second through hole. It replaces the original method of setting the split slip pieces 310, enabling each part of the slip to be maintained at the same horizontal height, greatly reducing the influence on the clamping effect of the oil pipe, improving the stability of the oil pipe suspension, and moreover, no longer requiring the disassembly and hoisting of external connection tools to complete the suspension operation of the oil pipe, reducing the operation process steps, improving the operation process efficiency, and avoiding safety risks during the oil pipe suspension process.

[0135] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated suspension device, characterized in that, Comprising: An installation part (100), a first through hole for the coaxial passage of an oil pipe is provided in the installation part (100), and a second through hole is further provided in the installation part (100). One end of the second through hole faces the first through hole and is communicated with the first through hole; A connecting part (200), the connecting part (200) is movably arranged in the second through hole, and the connecting end of the connecting part (200) faces the first through hole; A clamping part (300), the clamping part (300) is arranged circumferentially around the oil pipe in the first through hole and is connected to the connecting end of the connecting part (200); When the connecting part (200) moves in a direction away from the first through hole, the connection between the connecting end of the connecting part (200) and the clamping part (300) is released; The inner diameter of the end of the first through hole far from the second through hole is smaller than the inner diameter of the end of the first through hole close to the second through hole; When the connection between the connecting end of the connecting part (200) and the clamping part (300) is released, the clamping part (300) moves in the first through hole in a direction away from the second through hole until the inner wall of the first through hole presses the clamping part (300) against the outer periphery of the oil pipe.

2. The integrated suspension device according to claim 1, characterized in that, One end of the second through hole close to the first through hole is communicated with the top of the first through hole; The inner diameter of the bottom of the first through hole is smaller than the inner diameter of the top of the first through hole; When the connection between the connecting end of the connecting part (200) and the clamping part (300) is released, the clamping part (300) falls to the bottom of the first through hole and is squeezed by the inner wall of the bottom of the first through hole.

3. The integrated suspension device according to claim 1, characterized in that, There are multiple second through holes, and the multiple second through holes are evenly distributed circumferentially around the first through hole; There are multiple connecting parts (200), and the multiple connecting parts (200) are arranged in one-to-one correspondence with the multiple second through holes.

4. The integrated suspension device according to claim 1, characterized in that, The second through hole is arranged in the radial direction of the first through hole.

5. The integrated suspension device according to any one of claims 1 to 4, characterized in that, The installation part (100) includes: An installation column, the installation seat is coaxially installed on the wellhead; The first through hole is axially provided in the middle of the installation column along the axis of the installation column; The second through hole is radially provided on one side of the installation column along the radius of the installation column.

6. The integrated suspension device according to claim 5, characterized in that, The installation column is a conversion flange.

7. The integrated suspension device according to claim 3, characterized in that, The clamping part (300) is a slip, the slip is arranged circumferentially around the outer periphery of the oil pipe, and the outer wall of the slip is connected to the connecting ends of the multiple connecting parts (200); Multiple tensioning structures (320) are arranged on the slip, and the slip can expand or contract radially along the oil pipe through the tensioning structures (320).

8. The integrated suspension device according to claim 7, wherein, Multiple insertion slots (311) are provided on the outer wall of the slip, the multiple insertion slots (311) correspond to the connecting ends of the multiple connecting parts (200) one by one, and the connecting ends of the connecting parts (200) are inserted into the corresponding insertion slots (311).

9. The integrated suspension device according to claim 7, wherein They are evenly distributed among multiple tensioning structures (320), and each tensioning structure (320) is respectively located between the connecting ends of every two adjacent connecting parts (200).

10. The integrated suspension device according to any one of claims 7 to 9, characterized in that, The inner wall of the first through hole is an inner arc-shaped structure, the outer wall of the slip is an outer arc-shaped structure, and the inner arc-shaped structure is adapted to the outer arc-shaped structure.

11. The integrated suspension device according to any one of claims 7 to 9, characterized in that, The inner wall of the first through hole is an inner stepped structure to form a plurality of abutting platforms (110) along the axial direction of the first through hole on the inner wall of the first through hole; The outer wall of the slip can abut against a plurality of the abutting platforms (110) in sequence.

12. The integrated suspension device according to any one of claims 1 to 4, characterized in that, The connecting part (200) includes: A moving component (210), the moving component (210) is movably arranged in the second through hole, and one end of the moving component (210) close to the first through hole forms the connecting end of the connecting part (200); A sealing component (220), the sealing component (220) is arranged circumferentially around the second through hole between the outer wall of the moving component (210) and the inner wall of the second through hole.

13. The integrated suspension device according to claim 12, characterized in that, The moving component (210) includes: A movable rod (211), one end of the movable rod (211) is movably inserted into the second through hole and connected to the clamping part (300), and the other end of the movable rod (211) extends away from the first through hole to the outside of the mounting part (100).

14. The integrated suspension device according to claim 13, characterized in that, The moving component (210) further includes: A threaded sleeve (212), the threaded sleeve (212) is arranged circumferentially around the second through hole in the second through hole, and the movable rod (211) is threadedly inserted through the threaded sleeve (212).

15. The integrated suspension device according to claim 13, characterized in that, One end of the movable rod (211) close to the first through hole is provided with a connecting rod (213); The end of the connecting rod (213) away from the movable rod (211) is inserted into the outer wall of the clamping part (300).

16. The integrated suspension device according to claim 15, characterized in that, The end of the connecting rod (213) inserted into the outer wall of the clamping part (300) is fixedly connected to the outer wall of the clamping part (300); The outer diameter dimension of the connecting rod (213) is smaller than the outer diameter dimension of the movable rod (211).

17. The integrated suspension device according to claim 14, characterized in that, A stepped structure is provided on the inner wall of the second through hole close to the first through hole, and the stepped structure and one end of the threaded sleeve (212) close to the first through hole enclose a sealing groove; The sealing component (220) is arranged circumferentially around the second through hole in the sealing groove.

18. The integrated suspension device according to claim 17, characterized in that, The sealing component (220) includes: A first pressing cap (221), a sealing ring (222) and a second pressing cap (223) which are abutted and arranged in sequence along the axial direction of the second through hole; The first pressing cap (221), the sealing ring (222) and the second pressing cap (223) are all arranged circumferentially around the second through hole in the sealing groove; One end of the first pressing cap (221) abuts against one end of the threaded sleeve (212) close to the first through hole.

19. The integrated suspension device according to claim 18, wherein, The outer wall of the threaded sleeve (212) is threadedly connected to the inner wall of the second through hole, and the threaded sleeve (212) can move along the axial direction of the second through hole towards or away from the first through hole.

20. The integrated suspension device according to claim 18, wherein One end of the threaded sleeve (212) away from the first through hole extends axially along the second through hole in a direction away from the first through hole to the outside of the mounting portion (100).

21. A tubing string hanging method, which uses the integral hanging device as described in any one of claims 1 to 19, characterized in that Comprising the following steps: The mounting portion (100) is installed on the wellhead, such that the first through hole of the mounting portion (100) is coaxially arranged with the wellhead, and the tubing passes through the first through hole into the wellhead; Drive the connecting portion (200) to move in a direction away from the first through hole, such that the connection between the connecting portion (200) and the clamping portion (300) is released; After the connection is released, the clamping portion (300) moves along the direction of the first through hole, and the inner wall of the first through hole presses the clamping portion (300), such that the clamping portion (300) contracts in a direction close to the tubing to clamp the tubing.

Images