Centralizer convenient to install

Abstract

The utility model relates to the technical field of centralizers, in particular to a centralizer convenient to install, and aims to solve the technical problems that in the prior art, due to the integrated design limited by an annular structure, rapid installation is difficult to achieve, and the installation efficiency is low. The centralizer comprises a connecting cylinder and a quick release assembly. The connecting cylinder is arranged on the casing string in a sleeving mode and divided into a first semi-ring plate and a second semi-ring plate. The quick-release assembly comprises a first quick-release unit and a second quick-release unit which are detachable, the first quick-release unit is installed on the first semi-ring plate, and the second quick-release unit is installed on the second semi-ring plate. According to the centralizer, the main body is divided into two semi-annular structures, namely the first semi-annular plate and the second semi-annular plate, and the quick release component has a detachable function, so that the centralizer can be directly mounted from the side wall of a casing string, and the tedious mounting step of sequentially sleeving from the end part of the casing string is omitted. The technical problems that an existing centralizer is limited by the integrated design of an annular structure, rapid installation is difficult to achieve, and the installation efficiency is low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of centralizers, in particular to a centralizer which is convenient for installation. Background Art

[0002] A centralizer is a device used in oil and gas drilling. By installing a rigid and elastic centralizing framework on the outer surface of the casing string, it ensures that the casing string is centered in the wellbore. The current standard rigid centralizer consists of two stop rings and a rigid centralizer body. During installation, first, the rigid centralizer body is sleeved on the casing string, and then the stop rings are installed at its upper and lower ends respectively. However, the existing centralizer is limited by the one-piece design of the annular structure, resulting in the need to be sleeved from the end of the casing string in sequence during installation, making it difficult to achieve rapid installation, which directly affects the installation efficiency of the centralizer.

[0003] The existing centralizer has the technical problem that it is limited by the one-piece design of the annular structure, resulting in difficult rapid installation and low installation efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a centralizer which is convenient for installation, so as to solve the technical problem in the related art that it is limited by the one-piece design of the annular structure, resulting in difficult rapid installation and low installation efficiency.

[0005] In order to solve the above technical problem, the technical solution provided by the utility model lies in:

[0006] The centralizer provided by the utility model includes:

[0007] A connecting cylinder and a quick-release assembly. The connecting cylinder is sleeved on the casing string and is evenly divided into a first half-ring plate and a second half-ring plate along the diameter direction. The quick-release assembly includes a first quick-release unit and a second quick-release unit. The first quick-release unit is installed on the first half-ring plate, the second quick-release unit is installed on the second half-ring plate, and the first quick-release unit and the second quick-release unit are detachably connected, so that the first half-ring plate and the second half-ring plate are connected.

[0008] Specifically, the first quick-release unit includes a first clamping plate and a connecting shell. The first clamping plate is slidably connected to the connecting shell, and the connecting shell is installed on the first half-ring plate. The second quick-release unit includes a connecting seat, and the connecting seat is installed on the second half-ring plate. The connecting shell is inserted into the connecting seat and locked with the connecting seat through the first clamping plate. When the first clamping plate slides and separates from the connecting seat, the connecting shell is unlocked from the connecting seat, and the first half-ring plate and the second half-ring plate can be switched between the combined state and the separated state.

[0009] Specifically, the first clamping plate is provided with the clamping posts, and the connecting seat is provided with clamping grooves. The clamping posts penetrate through the connecting shell and are inserted into the clamping grooves. As the first clamping plate slides, the clamping posts are inserted into or disengaged from the clamping grooves, so as to lock or unlock the connecting shell and the connecting seat.

[0010] Specifically, the first quick-release unit further includes a sliding plate and a connecting rod. The sliding plate is slidably connected to the connecting shell. One end of the connecting rod is hinged to the sliding plate, and the other end is hinged to the first clamping plate. The sliding of the sliding plate is used to drive the connecting rod to swing so as to drive the first clamping plate to slide, so as to lock or unlock the connecting shell and the connecting seat.

[0011] Specifically, the first quick-release unit further includes a guide rod. Taking the insertion direction of the connecting shell and the connecting seat as the first direction. The axial direction of the guide rod is perpendicular to the first direction, and the guide rod is installed on the connecting shell, and the first clamping plate is slidably connected to the guide rod.

[0012] Specifically, the first quick-release unit further includes a second clamping plate and a spring. The second clamping plate and the first clamping plate are arranged as mirror images and are symmetric about the middle cross-section of the guide rod. The clamping posts of the first clamping plate are arranged on the side far from the second clamping plate. The spring is sleeved on the guide rod, and both ends respectively abut against the first clamping plate and the second clamping plate, and are used to apply a thrust force to the first clamping plate and the second clamping plate, so that the clamping posts are inserted into the clamping grooves.

[0013] Specifically, the first quick-release unit further includes a pulling plate. The pulling plate is installed on the side of the sliding plate away from the connecting seat and is used to pull the sliding plate. An operation port is opened on the surface of the connecting shell away from the first half-ring plate for operating the pulling plate.

[0014] Specifically, it further includes a centering and guiding assembly. The centering and guiding assembly includes a guiding unit. One end of the guiding unit is connected to the connecting cylinder, and the other end abuts against the inner wall of the wellbore. A plurality of the guiding units are evenly distributed around the axis of the connecting cylinder.

[0015] Specifically, the guiding unit includes a convex block and a ball. One end of the convex block is fixedly connected to the outer wall of the connecting cylinder, and a plurality of the balls are evenly distributed at the other end. The balls can roll freely and abut against the inner wall of the wellbore.

[0016] Specifically, the convex block unfolds along a spiral trajectory around the axis of the connecting cylinder.

[0017] Based on the above technical solutions, the beneficial effects of the present utility model are analyzed as follows:

[0018] The present utility model provides a centralizer that is easy to install, including:

[0019] a connecting cylinder and a quick-release assembly. The connecting cylinder is sleeved on the casing string and is evenly divided into a first half-ring plate and a second half-ring plate along the diameter direction. The quick-release assembly includes a first quick-release unit and a second quick-release unit. The first quick-release unit is installed on the first half-ring plate, and the second quick-release unit is installed on the second half-ring plate. The first quick-release unit and the second quick-release unit are detachably connected, so that the first half-ring plate and the second half-ring plate can be switched between a combined state and a separated state.

[0020] In specific application, the first half-ring plate and the second half-ring plate are successively wound around the side wall of the casing string, the first quick-release unit is docked with the second quick-release unit, and the first half-ring plate and the second half-ring plate are tightly combined and completed the switching from the separated state to the combined state.

[0021] It can be seen that compared with the prior art, this centralizer divides the main body into two semi-circular structures, namely the first half-ring plate and the second half-ring plate, and then cooperates with the detachable function of the quick-release assembly, and can be directly installed from the side wall of the casing string, eliminating the cumbersome installation steps of sequentially sleeving from the end of the casing string. It overcomes the technical problems existing in the existing centralizer that are limited by the integrated design of the annular structure, resulting in difficulty in achieving rapid installation and low installation efficiency. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Schematic diagram of the overall structure of the centralizer provided by the embodiment of the present utility model Figure 1 ;

[0024] Figure 2 Schematic diagram of the overall structure of this centralizer Figure 2 ;

[0025] Figure 3 Sectional view of the locking mechanism.

[0026] Icon:

[0027] 100, connecting cylinder; 110, first half-ring plate; 120, second half-ring plate;

[0028] 200, Quick-release component; 210, First quick-release unit; 211, First clamping plate; 2111, Clamping post; 212, Connection shell; 202, Operation port; 213, Sliding plate; 214, Connecting rod; 215, Guide rod; 216, Second clamping plate; 217, Spring; 218, Pulling plate; 220, Second quick-release unit; 221, Connection seat; 201, Clamping groove;

[0029] 300, Centering and guiding component; 310, Guiding unit; 311, Protrusion; 312, Ball. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] The following will describe in detail some implementation manners of the present utility model with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] The existing centralizer is limited by the integrated design of the annular structure, resulting in the technical problems of difficult rapid installation and low installation efficiency.

[0034] In view of this, the present utility model provides a centralizer that is easy to install, including:

[0035] A connection cylinder 100 and a quick-release component 200. The connection cylinder 100 is sleeved on the casing string and evenly divided into a first half-ring plate 110 and a second half-ring plate 120 along the diameter direction. The quick-release component 200 includes a first quick-release unit 210 and a second quick-release unit 220. The first quick-release unit 210 is installed on the first half-ring plate 110, and the second quick-release unit 220 is installed on the second half-ring plate 120. The first quick-release unit 210 and the second quick-release unit 220 are detachably connected, so as to connect the first half-ring plate 110 and the second half-ring plate 120.

[0036] Based on the above technical solutions, the centralizer provided by the present utility model can achieve the following technical effects:

[0037] The centralizer will divide the main body into two semi-circular structures, namely the first semi-circular plate 110 and the second semi-circular plate 120, and then cooperate with the detachable function of the quick-release assembly 200, which can be directly installed from the side wall of the casing string, eliminating the cumbersome installation steps of sequentially sleeving from the end of the casing string. It overcomes the technical problems existing in the existing centralizer, which is limited by the integrated design of the annular structure, resulting in difficulty in achieving rapid installation and low installation efficiency.

[0038] The following will combine Figures 1 to 3 to elaborate in detail on the structure and shape of the centralizer provided in this embodiment:

[0039] Regarding how the first quick-release unit 210 achieves detachable connection with the second quick-release unit 220, specifically:

[0040] The first quick-release unit 210 includes a guide rod 215, a first clamping plate 211, a connecting shell 212, a sliding plate 213, and a connecting rod 214. The second quick-release unit 220 includes a connecting seat 221. The connecting shell 212 is installed on the first semi-circular plate 110, the connecting seat 221 is installed on the second semi-circular plate 120, and the connecting shell 212 is inserted into the connecting seat 221. The insertion direction of the connecting shell 212 into the connecting seat 221 is defined as the first direction. The axis direction of the guide rod 215 is perpendicular to the first direction and is installed on the connecting shell 212. The first clamping plate 211 is slidably connected to the guide rod 215, the sliding plate 213 is slidably connected to the connecting shell 212, one end of the connecting rod 214 is hinged to the sliding plate 213, and the other end is hinged to the first clamping plate 211. The first clamping plate 211 is inserted into the connecting seat 221 to lock the connecting shell 212 and the connecting seat 221. When the first clamping plate 211 slides and separates from the connecting seat 221, the connecting shell 212 and the connecting seat 221 are unlocked. The sliding of the sliding plate 213 is used to drive the connecting rod 214 to swing, driving the first clamping plate 211 to slide along the guide rod 215, so as to lock or unlock the connecting shell 212 and the connecting seat 221, and further enable the first semi-circular plate 110 and the second semi-circular plate 120 to switch between the combined state and the separated state.

[0041] Specifically, the first clamping plate 211 is provided with a clamping post 2111, and the connecting seat 221 is provided with a clamping groove 201. The clamping post 2111 penetrates the connecting shell 212 and is then inserted into the clamping groove 201. As the first clamping plate 211 slides, the clamping post 2111 is inserted into or disengaged from the clamping groove 201, so as to lock or unlock the connecting shell 212 and the connecting seat 221. Among them, the clamping post 2111 can be set as a cone shape to facilitate insertion into the clamping groove 201.

[0042] In the solution of this embodiment, multiple clamping posts 2111 are evenly distributed along the length direction of the first clamping plate 211 to improve the locking stability.

[0043] In order to further improve the stability of locking, in the solution of this embodiment, the first quick-release unit 210 further includes a second clamping plate 216 and a spring 217. The second clamping plate 216 and the first clamping plate 211 are arranged as mirror images and are symmetric about the middle section plane of the guide rod 215. The clamping post 2111 of the first clamping plate 211 is arranged on the side away from the second clamping plate 216. The spring 217 is sleeved on the guide rod 215, and both ends are respectively abutted against the first clamping plate 211 and the second clamping plate 216, and is used to apply a thrust force to the first clamping plate 211 and the second clamping plate 216, so as to release the locking between the connection shell 212 and the connection seat 221.

[0044] For the convenience of operation, in the solution of this embodiment, the first quick-release unit 210 further includes a pulling plate 218. The pulling plate 218 is installed on the side of the sliding plate 213 away from the connection seat 221 and is used to pull the sliding plate 213. An operation port 202 is formed on the surface of the connection shell 212 away from the first half-ring plate 110 for operating the pulling plate 218.

[0045] Specifically regarding how this centralizer achieves centralization and straightening:

[0046] In the solution of this embodiment, the centralizer further includes a centralizing and guiding assembly 300. The centralizing and guiding assembly 300 includes a guiding unit 310, and a plurality of guiding units 310 are evenly distributed around the axis of the connecting cylinder 100. The guiding unit 310 includes a convex block 311 and a ball 312. One end of the convex block 311 is fixedly connected to the outer wall of the connecting cylinder 100, and the other end is evenly provided with a plurality of balls 312. The balls 312 can roll freely and abut against the inner wall of the wellbore. When running into the well, the circumferentially evenly distributed plurality of convex blocks 311 roll on the inner wall of the wellbore through the balls 312 to realize the centering and positioning of the connecting cylinder 100 and the wellbore, thereby completing the centering and positioning of the casing string and the wellbore. Among them, the rolling of the balls 312 is used to reduce the resistance during the process of retracting and releasing the casing string.

[0047] In the solution of this embodiment, the convex block 311 is unfolded in a spiral trajectory around the axis of the connecting cylinder 100. The spiral flow guiding groove formed between the adjacent spiral convex blocks 311 is used to improve the flow state of the external fluid medium.

[0048] In summary, the specific working process of the centralizer provided in this embodiment is as follows:

[0049] The first half-ring plate 110 and the second half-ring plate 120 are successively wound around the side wall of the casing string. The pulling plate 218 is pulled to drive the sliding plate 213 to slide, so as to drive the connecting rod 214 to swing, thereby driving the first clamping plate 211 and the second clamping plate 216 to move towards each other against the elastic force of the spring 217. At the same time, the opposite sliding of the first clamping plate 211 and the second clamping plate 216 along the guide rod 215 is used to drive the clamping column 2111 to retract into the connecting shell 212. The connecting shell 212 is inserted into the connecting seat 221 to complete the switching of the first half-ring plate 110 and the second half-ring plate 120 from the separated state to the combined state.

[0050] Release the pulling plate 218. The first clamping plate 211 and the second clamping plate 216 move away from each other under the elastic thrust of the spring 217 and are reset. The clamping column 2111 is inserted into the clamping groove 201 to lock the connecting shell 212 and the connecting seat 221, thereby locking the first half-ring plate 110 and the second half-ring plate 120 in the combined state. When lowering into the well, a plurality of circumferentially evenly distributed bumps 311 roll on the inner wall of the wellbore through the balls 312 to achieve the centering and positioning of the connecting cylinder 100 and the wellbore, thereby completing the centering and positioning of the casing string and the wellbore. Among them, the rolling of the balls 312 is used to reduce the resistance during the retraction and deployment of the casing string. The spiral flow guiding grooves formed between the adjacent spiral bumps 311 are used to improve the flow state of the external fluid medium.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; 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 on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centralizer that is easy to install, characterized in that, Including: A connecting cylinder (100) and a quick-release assembly (200); The connecting cylinder (100) is sleeved on a casing string and is evenly divided into a first half-ring plate (110) and a second half-ring plate (120) in the diameter direction; The quick-release assembly (200) includes a first quick-release unit (210) and a second quick-release unit (220); The first quick-release unit (210) is installed on the first half-ring plate (110); The second quick-release unit (220) is installed on the second half-ring plate (120); The first quick-release unit (210) and the second quick-release unit (220) are detachably connected, so that the first half-ring plate (110) and the second half-ring plate (120) are connected.

2. The centralizer according to claim 1, characterized in that: The first quick-release unit (210) includes a first clamping plate (211) and a connecting shell (212), the first clamping plate (211) is slidably connected to the connecting shell (212), and the connecting shell (212) is installed on the first half-ring plate (110); The second quick-release unit (220) includes a connecting seat (221), and the connecting seat (221) is installed on the second half-ring plate (120); The connecting shell (212) is inserted into the connecting seat (221) and locked with the connecting seat (221) through the first clamping plate (211); When the first clamping plate (211) slides and separates from the connecting seat (221), the connecting shell (212) is unlocked from the connecting seat (221), and the first half-ring plate (110) and the second half-ring plate (120) can be switched between a combined state and a separated state.

3. The centralizer according to claim 2, characterized in that: The first clamping plate (211) is provided with a clamping post (2111); The connecting seat (221) is provided with a clamping groove (201); The clamping post (2111) penetrates the connecting shell (212) and is inserted into the clamping groove (201); As the first clamping plate (211) slides, the clamping post (2111) is inserted into or disengaged from the clamping groove (201), so that the connecting shell (212) is locked or unlocked with the connecting seat (221).

4. The centralizer according to claim 3, characterized in that: The first quick-release unit (210) further includes a sliding plate (213) and a connecting rod (214), the sliding plate (213) is slidably connected to the connecting shell (212); One end of the connecting rod (214) is hinged to the sliding plate (213), and the other end is hinged to the first clamping plate (211); The sliding of the sliding plate (213) is used to drive the connecting rod (214) to swing to drive the first clamping plate (211) to slide, so that the connecting shell (212) is locked or unlocked with the connecting seat (221).

5. The centralizer according to claim 4, characterized in that: The first quick-release unit (210) further includes a guide rod (215); Taking the insertion direction of the connecting shell (212) and the connecting seat (221) as the first direction; The axis direction of the guiding rod (215) is perpendicular to the first direction and is installed on the connecting shell (212); The first clamping plate (211) is slidably connected to the guiding rod (215).

6. The centralizer according to claim 5, characterized in that: The first quick-release unit (210) further includes a second clamping plate (216) and a spring (217); The second clamping plate (216) and the first clamping plate (211) are arranged as mirror images and are symmetric about the middle cross-section of the guiding rod (215); The clamping post (2111) of the first clamping plate (211) is arranged on the side away from the second clamping plate (216); The spring (217) is sleeved on the guiding rod (215), and both ends respectively abut against the first clamping plate (211) and the second clamping plate (216), and is used to apply a thrust force to the first clamping plate (211) and the second clamping plate (216) so that the clamping post (2111) is inserted into the clamping groove (201).

7. The centralizer according to claim 6, characterized in that: The first quick-release unit (210) further includes a pulling plate (218); The pulling plate (218) is installed on the side of the sliding plate (213) away from the connecting seat (221) and is used to pull the sliding plate (213); An operation opening (202) is formed on the surface of the connecting shell (212) away from the first half-ring plate (110) for operating the pulling plate (218).

8. The centralizer according to claim 1, characterized in that: It further includes a centralizing and guiding assembly (300); The centralizing and guiding assembly (300) includes a guiding unit (310); One end of the guiding unit (310) is connected to the connecting cylinder (100), and the other end abuts against the inner wall of the wellbore; A plurality of the guiding units (310) are evenly distributed around the axis of the connecting cylinder (100).

9. The centralizer according to claim 8, characterized in that: The guiding unit (310) includes a convex block (311) and a ball (312); One end of the convex block (311) is fixedly connected to the outer wall of the connecting cylinder (100), and the other end is evenly provided with a plurality of the balls (312); The balls (312) can roll freely and abut against the inner wall of the wellbore.

10. The centralizer according to claim 9, characterized in that: The convex block (311) unfolds along a spiral trajectory around the axis of the connecting cylinder (100).

Images