Directional well casing centralizer

Abstract

The utility model discloses a directional well casing centralizer relates to casing centralizer technical field, including installation pipe no.

Description

Technical Field

[0001] This utility model relates to the technical field of casing centralizers, specifically a casing centralizer for directional wells. Background Technology

[0002] The casing centralizer supports the casing, aligning its axis with the wellbore axis. This ensures uniform distribution of cement slurry, prevents narrow-edge stagnation, forms a complete cement ring, reduces the contact area between the casing and the wellbore, lowers casing running resistance, prevents sticking, and improves interlayer sealing, preventing oil, gas, and water channeling.

[0003] A search revealed a utility model patent with Chinese patent publication number CN206668173U, which discloses a directional well casing centralizer, comprising a fixed body and a first rigid centralizer plate. The fixed body has a centralizer cavity on its inner side, and the fixed body is fixed to the inner side of the first rigid centralizer plate. A spring plate is connected in the sliding groove, and a second rigid centralizer plate is connected to the lower end of the spring plate. The fixed body has a main body window, and a fixing pin is installed in the second rigid centralizer plate. The fixed body is fixed to the inner side of the second rigid centralizer plate.

[0004] The above-mentioned device connects the centralizer and the sleeve by passing bolts through the screw holes. Therefore, multiple operations are required during installation, which consumes a lot of time. During the installation of the sleeve, the centralizer must be fixed to each sleeve, which is a large amount of work and does not improve work efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a directional well casing centralizer to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a directional well casing centralizer, comprising an installation pipe one, an installation pipe two, and several support bars. The installation pipe one is located directly above the installation pipe two. The several support bars are evenly distributed outside the installation pipe one and the installation pipe two. A connecting component is fixedly connected to the top of the installation pipe one. A positioning component is provided on the outside of both the installation pipe one and the installation pipe two. The connecting component includes a threaded line one formed on the top of the outer circumference of the installation pipe one. A compression ring one is threadedly connected to the outside of the threaded line one. A contact ring is coaxially fixed to the bottom outer wall of the compression ring one. Several equally distributed clearance grooves are formed on the outer circumference of the installation pipe one. An inclined contact piece is fixedly connected to the inner wall of the top of each of the clearance grooves, and one bottom end of each of the contact pieces is inclined towards the contact ring. A reinforcing structure is provided on the top of the installation pipe one.

[0007] While ensuring a stable connection between the installation tube and the sleeve, the installation process is quick and convenient, which helps to improve installation efficiency. Furthermore, it eliminates the need for processing the outer wall of the sleeve, thus ensuring the strength of the sleeve. Using a chain wrench, the compression ring is rotated, and the compression ring moves downward along its matching thread. The contact ring at the bottom of the compression ring then contacts the contact piece. Since the contact piece is in an inclined state, as the contact ring continues to move, the contact piece is squeezed and flipped towards the sleeve. Its inner anti-slip pad is then tightly pressed against the outer wall of the sleeve, greatly increasing the static friction between the two and keeping the installation tube stable, thereby achieving the connection.

[0008] As a further preferred embodiment of this technical solution, the reinforcing structure includes an insertion groove formed on the inner side of the outer wall of the top of the mounting tube, a plurality of friction plates distributed at equal intervals are fixedly connected to the inner side of the bottom inner wall of the insertion groove, and a triggering structure is fixedly connected to the top of the extrusion ring.

[0009] As a further preferred embodiment of this technical solution, the triggering structure includes four support columns fixedly connected to the top outer wall of the compression ring one, and the four support columns are fixedly connected to the same compression ring two, with one bottom end of the compression ring two located outside the plurality of friction plates.

[0010] As a further preferred embodiment of this technical solution, the positioning component includes several receiving grooves formed on the outer circumference of the second mounting tube. A second threaded wire is fixedly connected to the bottom of the outer circumference of the second mounting tube. A restraining ring is threaded to the outside of the second threaded wire. A reinforcing member is fixedly connected inside the receiving groove. One bottom end of several support bars is respectively engaged inside several receiving grooves.

[0011] By using a chain wrench to rotate the restraining ring, the restraining ring moves downward along the second thread. Then, the end of the support bar inserted into the receiving groove will no longer be restricted. It can be removed simply by pulling it outward. After reinstallation, drive the restraining ring to surround the end of the support bar. Under the restriction of the receiving groove, the support bar will be stable enough and will not easily come off.

[0012] As a further preferred embodiment of this technical solution, the reinforcing member includes a limiting pin fixedly connected to the inner wall of one end of the receiving groove. The limiting pin is horizontally positioned, and a sleeve groove adapted to the limiting pin is provided at one bottom end of the support bar.

[0013] As a further preferred embodiment of this technical solution, the outer circumference of the extrusion ring and the restraint ring are provided with a number of equally spaced vertical grooves.

[0014] As a further preferred embodiment of this technical solution, an anti-slip pad is fixedly connected to the outer wall of one side of the contact pads and the outer wall of one side of the friction pads.

[0015] This utility model provides a directional well casing centralizer, which has the following beneficial effects: (1) By setting up a connecting component, this utility model ensures a stable connection between the installation tube and the sleeve, and the installation process is quick and convenient, which is conducive to improving the installation efficiency. Moreover, there is no need to process the outer wall of the sleeve, which can ensure the strength of the sleeve. The chain wrench drives the compression ring to rotate, and the compression ring moves downward along the thread line that matches it. The contact ring at the bottom of the compression ring then contacts the contact piece. Since the contact piece is in an inclined state, when the contact ring continues to move, the contact piece will be squeezed and flipped towards the sleeve. The anti-slip pad on its inner side will be tightly squeezed on the outer wall of the sleeve. The static friction between the two will be greatly increased, so that the installation tube remains stable, thereby achieving the connection.

[0016] (2) By setting a positioning component, the chain wrench drives the restraining ring to rotate. The restraining ring moves downward along the thread line. Then, the end of the support bar inserted into the receiving groove will no longer be restricted. It can be removed by simply pulling it outward. After reinstallation, the restraining ring is driven to surround the end of the support bar. Under the restriction of the receiving groove, the support bar will be stable enough and will not easily come off. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model; Figure 2 This is a schematic diagram of the overall second-view structure of this utility model; Figure 3 This is an enlarged structural diagram of the connecting component of this utility model; Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle; In the diagram: 1. Mounting tube one; 2. Mounting tube two; 3. Support bar; 4. Connecting assembly; 5. Positioning assembly; 401. Thread one; 402. Compression ring one; 403. Clearance groove; 404. Contact piece; 405. Contact ring; 406. Anti-slip pad; 407. Insertion groove; 408. Friction piece; 409. Compression ring two; 501. Receiving groove; 502. Limiting pin; 503. Thread two; 504. Restraint ring. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] This utility model provides a technical solution: such as Figure 2 and Figure 3As shown in this embodiment, a directional well casing centralizer includes an installation pipe 1, an installation pipe 2, and several support bars 3. The installation pipe 1 is located directly above the installation pipe 2. Several support bars 3 are evenly distributed outside the installation pipe 1 and the installation pipe 2. A connecting component 4 is fixedly connected to the top of the installation pipe 1. A positioning component 5 is provided on the outside of both the installation pipe 1 and the installation pipe 2. The connecting component 4 includes a threaded line 401 opened on the top of the outer circumference of the installation pipe 1. A compression ring 402 is threadedly connected to the outside of the threaded line 401. A contact ring 405 is coaxially fixed to the bottom outer wall of the compression ring 402. Several equally distributed clearance grooves 403 are opened on the outer circumference of the installation pipe 1. An inclined contact piece 404 is fixedly connected to the top inner wall of each clearance groove 403. One bottom end of each contact piece 404 is inclined towards the contact ring 405. A reinforcing structure is provided on the top of the installation pipe 1.

[0020] Using a chain wrench, the compression ring 402 is rotated. The compression ring 402 moves downward along the thread 401 that it is adapted to. The contact ring 405 at the bottom of the compression ring 402 then contacts the contact piece 404. Since the contact piece 404 is in an inclined state, as the contact ring 405 continues to move, the contact piece 404 will be squeezed and flipped towards the sleeve. The anti-slip pad 406 on its inner side will be tightly pressed against the outer wall of the sleeve. The static friction between the two will be greatly increased, so that the mounting tube 1 remains stable, thereby achieving the connection.

[0021] The reinforcing structure includes a plug groove 407 on the inner side of the outer wall of the top of the mounting tube 1, and a number of friction plates 408 distributed at equal intervals are fixedly connected to the inner side of the bottom inner wall of the plug groove 407. A triggering structure is fixedly connected to the top of the compression ring 402.

[0022] The triggering structure includes four support columns fixedly connected to the top outer wall of the compression ring 402. The four support columns are fixedly connected to the same compression ring 409. One bottom end of the compression ring 409 is located outside a number of friction plates 408.

[0023] As the compression ring 402 moves downward, the compression ring 409 at the top of the compression ring 402 will move downward simultaneously. The compression ring 409 will then enter the insertion groove 407 and contact the edge of the friction plate 408. The friction plate 408 will be pushed by the compression ring 409 to press against the sleeve, which can further improve the static friction between the installation tube 1 and the sleeve, thereby making the state of the centralizer more stable.

[0024] like Figure 2 and Figure 4As shown, the positioning component 5 includes several receiving grooves 501 formed on the outer circumference of the mounting tube 2. A threaded wire 503 is fixedly connected to the bottom of the outer circumference of the mounting tube 2. A restraining ring 504 is threaded to the outside of the threaded wire 503. A reinforcing member is fixedly connected inside the receiving groove 501. One end of the bottom of several support bars 3 is respectively snapped into the inside of several receiving grooves 501.

[0025] The reinforcement includes a limiting pin 502 fixedly connected to the inner wall of one end of the receiving groove 501. The limiting pin 502 is horizontally set, and a sleeve groove adapted to the limiting pin 502 is opened at one end of the bottom of the support bar 3.

[0026] Because the support bar 3 is assembled with the mounting tube 1 and mounting tube 2, the problem of partial damage rendering the whole unit unusable can be avoided. Furthermore, if one of the support bars 3 is damaged during the installation of the stabilizer, the damaged support bar 3 can be removed using the method described later. Then, a new support bar 3 can be reinstalled. By using a chain wrench to drive the restraint ring 504 to rotate, the restraint ring 504 will move downward along the thread 2 503. Subsequently, the end of the support bar 3 inserted into the receiving groove 501 will no longer be restricted and can be removed simply by pulling it outward. After reinstallation, the restraint ring 504 will surround the end of the support bar 3. Under the restriction of the receiving groove 501, the support bar 3 will be stable enough and will not easily detach.

[0027] like Figure 1 As shown in Figure 2, the outer circumference of the compression ring 402 and the restraint ring 504 has several equally spaced vertical grooves. This increases the friction between the chain wrench and the compression ring 402, preventing slippage.

[0028] like Figure 3 As shown, a number of contact pieces 404 are fixedly connected to an anti-slip pad 406 on one side of the outer wall and a number of friction pieces 408 are fixedly connected to an outer wall on one side of the outer wall. This can improve the friction between the two and the collar and prevent the sleeve from being damaged by pressure.

[0029] This utility model provides a directional well casing centralizer, the specific working principle of which is as follows: When the device is in operation, the centralizer is fitted onto the outside of the sleeve, and then pushed to slide along the sleeve. Once it reaches the appropriate position, the mounting tube 1 and the sleeve are connected using the connecting assembly 4. The compression ring 402 is then rotated using a chain wrench. The compression ring 402 moves downwards along its mating thread 401. The contact ring 405 at the bottom of the compression ring 402 then contacts the contact piece 404. Because the contact piece 404 is tilted, as the contact ring 405 continues to move, the contact piece 404 is squeezed and flipped towards the sleeve. The inner anti-slip pad 406 will be pressed tightly against the outer wall of the sleeve, greatly increasing the static friction between the two, thus stabilizing the installation tube 1 and achieving the connection. When the compression ring 402 moves downward, the compression ring 409 at the top of the compression ring 402 will move downward simultaneously. The compression ring 409 then enters the insertion groove 407 and contacts the edge of the friction plate 408. The friction plate 408 will be pushed by the compression ring 409 to press against the sleeve, which can further increase the static friction between the installation tube 1 and the sleeve, thereby making the centralizer more stable.

[0030] Since the installation tube 2 is slidably connected to the outside of the casing, and the support bar 3 is elastic, when the well wall squeezes the support bar 3 and deforms inward, the installation tube 2 will not cause obstruction, thus ensuring that the centralizer can adapt to changes in the well diameter.

[0031] Because the support bar 3 is assembled with the mounting tube 1 and mounting tube 2, the problem of partial damage rendering the whole unit unusable can be avoided. Furthermore, if one of the support bars 3 is damaged during the installation of the stabilizer, the damaged support bar 3 can be removed using the method described later. Then, a new support bar 3 can be reinstalled. By using a chain wrench to drive the restraint ring 504 to rotate, the restraint ring 504 will move downward along the thread 2 503. Subsequently, the end of the support bar 3 inserted into the receiving groove 501 will no longer be restricted and can be removed simply by pulling it outward. After reinstallation, the restraint ring 504 will surround the end of the support bar 3. Under the restriction of the receiving groove 501, the support bar 3 will be stable enough and will not easily detach.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A directional well casing centralizer, comprising an installation pipe one (1), an installation pipe two (2), and a plurality of support bars (3), wherein the installation pipe one (1) is located directly above the installation pipe two (2), and the plurality of support bars (3) are equidistantly distributed outside the installation pipe one (1) and the installation pipe two (2), characterized in that: The top of the first mounting tube (1) is fixedly connected to a connecting component (4). Both the first mounting tube (1) and the second mounting tube (2) are provided with a positioning component (5). The connecting component (4) includes a threaded line (401) opened on the top of the outer circumference of the first mounting tube (1). The threaded line (401) is threadedly connected to a compression ring (402). The bottom outer wall of the compression ring (402) is coaxially fixed with a contact ring (405). The outer circumference of the first mounting tube (1) is provided with several equally spaced clearance grooves (403). The top inner wall of several clearance grooves (403) is fixedly connected with an inclined contact piece (404). The bottom end of several contact pieces (404) is inclined towards the contact ring (405). The top of the first mounting tube (1) is provided with a reinforcing structure.

2. The directional well casing centralizer according to claim 1, characterized in that: The reinforcing structure includes a plug groove (407) opened on the inner side of the top outer wall of the mounting tube (1), and a number of friction plates (408) distributed at equal distances are fixedly connected to the inner side of the bottom inner wall of the plug groove (407), and a triggering structure is fixedly connected to the top of the extrusion ring (402).

3. A directional well casing centralizer according to claim 2, characterized in that: The triggering structure includes four support columns fixedly connected to the top outer wall of the first extrusion ring (402), and the four support columns are fixedly connected to the same second extrusion ring (409). One bottom end of the second extrusion ring (409) is located outside the several friction plates (408).

4. A directional well casing centralizer according to claim 1, characterized in that: The positioning component (5) includes several receiving grooves (501) formed on the outer circumference of the mounting tube (2). The bottom of the outer circumference of the mounting tube (2) is fixedly connected to a threaded wire (503). A binding ring (504) is threaded to the outside of the threaded wire (503). A reinforcing member is fixedly connected inside the receiving groove (501). One end of the bottom of several support bars (3) is respectively snapped into the inside of several receiving grooves (501).

5. A directional well casing centralizer according to claim 4, characterized in that: The reinforcement includes a limiting pin (502) fixedly connected to the inner wall of one end of the receiving groove (501). The limiting pin (502) is horizontally arranged, and the bottom end of the support bar (3) is provided with a sleeve groove that is adapted to the limiting pin (502).

6. A directional well casing centralizer according to claim 4, characterized in that: The outer circumference of the compression ring (402) and the binding ring (504) is provided with a number of equally spaced vertical grooves.

7. A directional well casing centralizer according to claim 3, characterized in that: An anti-slip pad (406) is fixedly connected to one side of the outer wall of each of the contact pads (404) and the other side of the outer wall of each of the friction pads (408).

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