Casing centralizer with resistance reducing function

Abstract

The invention discloses a casing centralizer with a resistance reducing function, and relates to the technical field of centralizers, the casing centralizer comprises a casing main body, an adjusting mechanism is arranged on the casing main body, and the adjusting mechanism is arranged outside the casing main body and used for centralizing the casing main body; through the designed adjusting mechanism, the diameter size of the centralizer can be adjusted according to the diameter size of a slightly-large or slightly-small sleeve main body in the using process, the movable arc-shaped plates which synchronously move make contact with each other and clamp the sleeve main body, and therefore the centralizer can be installed on the sleeve main body with the slightly-large or slightly-small diameter to be used; and a plurality of centralizers with different diameters are prevented from being prepared, so that the cost is saved, and the applicability of the centralizer to casing pipe main bodies with slightly large or slightly small diameters is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of centralizers, in particular to a casing centralizer with a resistance reduction function. Background Art

[0002] Casing centralizers play a vital role in oil drilling and construction projects. They are mainly used to ensure the correct position of the casing in the wellbore or engineering structure, prevent the casing from tilting, deforming or loosening when entering the well, so as to improve the stability and safety of the project, and reduce the friction resistance between the casing and the well wall, making it easier to lower the casing into the well.

[0003] In the prior art, a centralizer is installed on the outer wall of the casing, and then the casing is extended into the well to drive the centralizer in, and the outer wall of a plurality of spring pieces on the centralizer contacts the well wall to make the casing centered in the well. However, different casings have different diameters. When some slightly larger or smaller casings are placed in the well, it is necessary to prepare a plurality of centralizers of different sizes to meet the needs of casings with slightly larger or smaller diameters, which reduces the applicability of the centralizer to slightly larger or smaller casings and increases the cost of use. For this reason, we propose a casing centralizer with a resistance reduction function. Summary of the invention

[0004] The purpose of the present invention is to provide a casing centralizer with a resistance reduction function to solve the technical problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a casing centralizer with resistance reduction function, comprising a casing body, the casing body is provided with an adjustment mechanism, the adjustment mechanism is arranged outside the casing body, and is used to centralize the casing body; The adjustment mechanism comprises two groups of large bearings and multiple groups of fixed arc plates, and the outer wall of the large bearing is rotatably provided with an outer rotating ring; A fixing ring is fixedly arranged inside the fixed arc plate, a toothed rod is slidably arranged inside the fixing ring, and a movable arc plate is fixedly arranged at one end of the toothed rod for clamping the sleeve body.

[0006] Preferably, an L-shaped frame is fixedly provided on the top of the large bearing, a support bearing is fixedly provided on the end of the L-shaped frame, and a rotating rod is rotatably provided inside the support bearing; A circular gear is fixedly arranged at the bottom of the rotating rod, and an outer ring is fixedly sleeved on the outside of the rotating rod.

[0007] Preferably, a plurality of groups of connecting vertical plates are fixedly arranged between the two groups of large bearings for connecting and fixing the two groups of large bearings.

[0008] Preferably, a bracket is fixedly provided on the top of the large bearing, and a locking screw is threadedly connected inside the bracket.

[0009] Preferably, an adjustment assembly is provided between the two groups of fixed arc-shaped plates for adjusting according to the inner diameter of the well wall; The adjustment assembly includes two sets of hollow arc blocks and elastic strips, wherein the hollow arc blocks are mounted on the fixed arc plates and the ends of the elastic strips are used to penetrate the inside; An internal thread seat is embedded and installed on the elastic strip, a spiral column is connected to the interior of the internal thread seat through a thread, a small bearing is sleeved and fixed on one end of the spiral column, and an elastic sheet is fixed on the small bearing.

[0010] Preferably, a limiting rod is fixedly provided on the inner wall of the elastic sheet, and a through hole is opened inside the elastic strip.

[0011] Preferably, an internal thread ring is embedded and installed on the inner wall of the hollow arc block, and a locking stud is threadedly connected to the interior of the internal thread ring.

[0012] Preferably, a rotating member is provided between the two groups of outer rotating rings, for driving the outer rotating rings to rotate; The rotating member comprises a vertical rod and a fixing ring which is sleeved and fixed on the outside of the vertical rod.

[0013] Preferably, an upper bevel gear is fixedly provided on the outside of the vertical rod, a fixing seat is fixedly provided on the connecting vertical plate, a mounting bearing is fixedly provided on the fixing seat, and a rotating column is rotatably provided inside the mounting bearing.

[0014] Preferably, a lower bevel gear is fixedly provided at the end of the rotating column, a fixed bearing is provided outside the vertical rod, and the fixed bearing is fixed on the fixed seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention has a designed adjustment mechanism, which can adjust the diameter of the centralizer according to the diameter of the casing body that is slightly larger or smaller during use. The casing body is clamped by the synchronously moving curved plates, so that the centralizer can be installed on the casing body with a slightly larger or smaller diameter for use, thereby avoiding the need to prepare multiple centralizers of different diameters, thereby saving costs and increasing the applicability of the centralizer to the casing body with a slightly larger or smaller diameter.

[0016] (2) The present invention is designed with an adjustment component that can adjust the diameter of the multiple elastic sheets together according to the inner wall diameter of different wells during use, so that the stabilizer can meet the dimensions of the well wall with different diameters, making it convenient to put the stabilizer into the well for use, thereby increasing the applicability of the stabilizer to well walls with different diameters. In addition, when the elastic sheets are worn out after repeated use, they can be replaced, thereby improving the use effect of the stabilizer.

[0017] (3) The present invention has a rotating part that is designed so that when the diameter of the stabilizer is adjusted according to the casing body with a slightly larger or smaller diameter, the vertical rod is driven to rotate by rotating the rotating column, thereby driving the outer rotating ring located outside the large bearing to rotate, and further indirectly driving multiple movable arc plates to move synchronously. There is no need for personnel to rotate the outer rotating ring alone to move the movable arc plates, which facilitates operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the regulating mechanism of the present invention; Figure 3 It is a bottom view structural schematic diagram of the fixed curved plate and the movable curved plate of the present invention; Figure 4 It is a schematic diagram of the structure of the outer rotating ring and the large bearing of the present invention; Figure 5 It is a schematic diagram of the circular gear and toothed rod structure of the present invention; Figure 6 It is a schematic diagram of the structure of the adjustment component of the present invention; Figure 7 It is a schematic diagram of a partial cross-sectional structure of a hollow arc block of the present invention; Figure 8 It is a left-side structural schematic diagram of the rotating member of the present invention; Fig. 9 It is a schematic diagram of the rear view structure of the bracket of the present invention; In the figure: 100, sleeve body; 200, outer rotating ring; 201, toothed rod; 203, large bearing; 204, fixed arc plate; 205, bracket; 206, movable arc plate; 207, connecting vertical plate; 208, outer ring; 209, circular gear; 210, rotating rod; 211, supporting bearing; 212, fixing ring; 213, locking screw; 300, hollow arc block; 301, elastic sheet; 302, elastic strip; 303, internal thread seat; 304, small bearing; 305, spiral column; 306, limiting rod; 307, locking stud; 308, internal thread ring; 400, vertical rod; 401, fixed seat; 402, rotating column; 403, upper bevel gear; 404, fixing ring; 405, mounting bearing; 406, lower bevel gear; 407, fixing bearing. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1 See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 and Fig. 9 The present invention provides a technical solution: a casing centralizer with a resistance reduction function, comprising a casing body 100, an adjusting mechanism is arranged on the casing body 100, the adjusting mechanism comprises two groups of large bearings 203 and multiple groups of fixed arc plates 204, the large bearings 203 facilitate the outer rotating ring 200 to rotate, the outer wall of the large bearing 203 is rotatably provided with the outer rotating ring 200, a fixed ring 212 is fixedly arranged inside the fixed arc plate 204, a toothed rod 201 is slidably arranged inside the fixed ring 212, the toothed rod 201 can be driven to slide on the fixed ring 212 under the rotation action of a circular gear 209, and a movable arc plate 206 is fixedly arranged at one end of the toothed rod 201; An L-shaped frame is fixedly arranged on the top of the large bearing 203, and a support bearing 211 is fixedly arranged at the end of the L-shaped frame. The support bearing 211 can facilitate the rotation of the rotating rod 210 and support the rotating rod 210 during the rotation process. The rotating rod 210 is rotatably arranged inside the support bearing 211, and a connecting block is fixedly arranged between the large bearing 203 and the fixed arc plate 204; A circular gear 209 is fixedly provided at the bottom of the rotating rod 210, and the circular gear 209 is meshed with the toothed rod 201. An outer ring 208 is fixedly provided on the outer sleeve of the rotating rod 210, and the outer wall of the outer ring 208 contacts the outer wall of the outer rotating ring 200. Multiple groups of connecting vertical plates 207 are fixedly provided between the two groups of large bearings 203. The two groups of large bearings 203 can be connected together by connecting the vertical plates 207. The large bearings 203 are composed of an outer ring, an inner ring and a ball. The ball is arranged between the outer ring and the inner ring. The outer ring is fixed to the outer rotating ring 200, and the inner ring is fixedly connected to the connecting block, the bracket 205 and the L-shaped frame.

[0021] Embodiment 2 Based on Example 1, please refer to Figure 2 , Figure 4 and Fig. 9 A bracket 205 is also fixedly provided on the top of the large bearing 203, and a locking screw 213 is threadedly connected to the inside of the bracket 205. The locking screw 213 can be used to fix the outer rotating ring 200 to avoid accidental rotation of the outer rotating ring 200 when the outer rotating ring 200 is not rotated, and the working end of the locking screw 213 is in contact with the outer wall of the outer rotating ring 200.

[0022] The present invention adopts a designed adjustment mechanism, and during use, the diameter of the centralizer can be adjusted according to the diameter of the slightly larger or smaller casing. The movable arc plate 206 moves synchronously to contact and clamp the casing body 100, so that it can be installed on the casing of slightly larger or smaller diameter for use, avoiding the need to prepare multiple centralizers of different diameters, thereby saving costs and increasing the applicability of the centralizer to the casing body 100 of slightly larger or smaller diameters.

[0023] During use, the centralizer is adjusted according to the diameter of the casing body 100. When adjusting, the outer rotating ring 200 is rotated to drive the outer ring 208 to rotate, the outer ring 208 drives the rotating rod 210 to rotate, and the rotating rod 210 drives the circular gear 209 to rotate, thereby driving the toothed rod 201 meshed with it to move to the middle position close to the centralizer, and then the movable arc plate 206 can be driven to move, and then the movable arc plate 206 is moved until the inner wall diameter of the movable arc plate 206 is greater than and close to When the diameter size of the casing body 100 is reached, the centralizer stops moving, and then the centralizer is sleeved from the bottom of the casing body 100 to a suitable position outside the casing body 100, and then the outer rotating ring 200 is rotated, which indirectly drives the movable arc plate 206 to move in a direction close to the casing body 100 and contact and clamp it, so that the centralizer can be fixed on the casing body 100, so that the centralizer can be installed and fixed according to the casing body 100 with a slightly larger or smaller diameter size, thereby increasing the applicability of the centralizer.

[0024] Embodiment 3 Based on Example 2, please refer to Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 , an adjustment component is provided between the two sets of fixed arc plates 204, for adjusting according to the inner diameter of the well wall; The adjustment component includes two groups of hollow arc blocks 300 and elastic strips 302. The two ends of the elastic strips 302 can penetrate into the interior of the hollow arc blocks 300. The hollow arc blocks 300 are installed on the fixed arc plates 204, so that the ends of the elastic strips 302 can penetrate into the interior. An internal threaded seat 303 is embedded and installed on the elastic strips 302. A spiral column 305 is connected to the interior of the internal threaded seat 303 through a thread. A small bearing 304 is sleeved and fixed on one end of the spiral column 305. The small bearing 304 can facilitate the movement of the elastic sheet 301. The elastic sheet 301 is fixedly arranged on the small bearing 304. A limiting rod 306 is fixedly arranged on the inner wall of the elastic sheet 301. A through hole is opened inside the elastic strip 302. The end of the limiting rod 306 passes through the inside of the through hole and contacts the well wall through the outer wall of the elastic sheet 301, so as to avoid the casing body 100 directly contacting the well wall, thereby reducing the friction resistance generated by the well wall to the casing body 100 during use. An internal thread ring 308 is embedded in the inner wall of the hollow arc block 300, and a locking stud 307 is threadedly connected to the inside of the internal thread ring 308. The locking stud 307 can be used to fix the end of the elastic strip 302 that penetrates into the hollow arc block 300, and the working end of the locking stud 307 extends to the inner wall surface of the elastic strip 302.

[0025] The present invention adopts a designed adjustment component, which can adjust the diameter formed by the multiple elastic sheets 301 according to the inner wall diameter of different wells during use, so that the stabilizer can meet the dimensions of the well wall with different diameters, and it is convenient to put the stabilizer into the well for use, thereby increasing the applicability of the stabilizer to well walls with different diameters. Moreover, when the elastic sheet 301 is worn after being used for many times, it can be replaced, thereby improving the use effect of the stabilizer.

[0026] During use, when installing the centralizer, the elastic strip 302 is adjusted according to the inner wall size of the well. During adjustment, the spiral column 305 is rotated toward the middle position or the opposite position close to the centralizer, driving the small bearing 304 to move, and then the elastic sheet 301 can be driven to move outward or inward to a suitable position, so that the diameter formed by the multiple elastic sheets 301 is consistent with the diameter of the well wall, which is convenient for placing the centralizer into the well, increasing the applicability of the centralizer to well walls of different diameters, and when the elastic sheet 301 moves, it will drive the limit rod 306 to move in the elastic strip 302, so as to limit the moving elastic sheet 301; When installing the elastic strip 302 and the elastic sheet 301 on the centralizer, press the two ends of the elastic strip 302 in opposite directions, then insert the two ends of the elastic strip 302 into the corresponding hollow arc block 300, and finally rotate the locking stud 307 in the direction close to the elastic strip 302, so that the working end of the locking stud 307 contacts and clamps the elastic strip 302, and the elastic strip 302 and the elastic sheet 301 on the elastic strip 302 can be installed; When the elastic sheet 301 is worn after repeated use, the spiral column 305 is turned outward to unscrew it, driving the end of the spiral column 305 away from the elastic sheet 301 to disengage from the interior of the internal threaded seat 303 and the end of the limiting rod 306 to disengage from the interior of the elastic strip 302, and then the elastic sheet 301 can be removed. Then, a new elastic sheet 301 can be installed according to the reverse principle mentioned above.

[0027] Embodiment 4 Based on Example 3, please refer to Figure 1 , Figure 2 and Figure 8 A rotating member is provided between the two sets of outer rotating rings 200, for driving the outer rotating rings 200 to rotate; The rotating member includes a vertical rod 400 and a fixed ring 404 sleeved and fixed on the outside of the vertical rod 400. The fixed ring 404 can drive the outer rotating ring 200 to rotate when rotating, and the outer wall of the fixed ring 404 contacts the outer wall of the outer rotating ring 200. An upper bevel gear 403 is fixedly arranged on the outside of the vertical rod 400. When the rotating column 402 rotates, it drives the lower bevel gear 406 to rotate, thereby driving the upper bevel gear 403 to rotate, thereby driving the vertical rod 400 to rotate. A fixed seat 401 is fixedly arranged on the connecting vertical plate 207. A mounting bearing 405 is fixedly arranged on the fixed seat 401. A rotating column 402 is rotatably arranged inside the mounting bearing 405. A lower bevel gear 406 is fixedly disposed at the end of the rotating column 402 , and the lower bevel gear 406 is meshed with the upper bevel gear 403 . A fixed bearing 407 is disposed outside the vertical rod 400 , and the fixed bearing 407 is fixed on the fixed seat 401 .

[0028] The present invention has a designed rotating part. When the diameter size of the stabilizer is adjusted according to the slightly larger or smaller diameter size of the casing body 100, the vertical rod 400 is driven to rotate by rotating the rotating column 402, thereby driving the outer rotating ring 200 located outside the large bearing 203 to rotate, and then indirectly driving multiple movable arc plates 206 to move synchronously. There is no need for personnel to rotate the outer rotating ring 200 separately to move the movable arc plates 206, which facilitates operation.

[0029] During use, when the outer rotating ring 200 is rotated to move the movable arc plate 206, first hold the rotating column 402 and rotate it. Through the meshing action between the lower bevel gear 406 and the upper bevel gear 403, the vertical rod 400 can be driven to rotate, and the vertical rod 400 drives the fixed ring 404 to rotate, which can drive the outer rotating ring 200 to rotate, thereby indirectly driving the movable arc plate 206 to reciprocate. By rotating the rotating column 402, the multiple movable arc plates 206 located on the top and bottom stabilizers of the casing body 100 can be synchronously driven to move, so that the stabilizer can be installed on the casing body 100 or disassembled from the casing body 100, which is also convenient for adjustment according to different casing bodies 100.

[0030] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A casing centralizer with a drag reduction function, comprising a casing body (100), characterized in that: The casing body (100) is provided with an adjustment mechanism, which is arranged outside the casing body (100) and is used to straighten the casing body (100); The adjustment mechanism comprises two groups of large bearings (203) and a plurality of groups of fixed arc-shaped plates (204); an outer rotating ring (200) is rotatably provided on the outer wall of the large bearing (203); A fixing ring (212) is fixedly disposed inside the fixing arc plate (204), a toothed rod (201) is slidably disposed inside the fixing ring (212), and a movable arc plate (206) is fixedly disposed at one end of the toothed rod (201) for clamping the sleeve body (100).

2. The casing centralizer with resistance reduction function according to claim 1, characterized in that: An L-shaped frame is fixedly provided on the top of the large bearing (203), a support bearing (211) is fixedly provided on the end of the L-shaped frame, and a rotating rod (210) is rotatably provided inside the support bearing (211); A circular gear (209) is fixedly disposed on the bottom of the rotating rod (210), and an outer ring (208) is fixedly sleeved on the outside of the rotating rod (210).

3. The casing centralizer with resistance reduction function according to claim 1, characterized in that: A plurality of groups of connecting vertical plates (207) are fixedly arranged between the two groups of large bearings (203) and are used for connecting and fixing the two groups of large bearings (203).

4. The casing centralizer with resistance reduction function according to claim 1, characterized in that: A bracket (205) is also fixedly disposed on the top of the large bearing (203), and a locking screw (213) is threadedly connected inside the bracket (205).

5. The casing centralizer with resistance reduction function according to claim 1, characterized in that: An adjustment component is provided between the two groups of fixed arc-shaped plates (204) for adjusting according to the inner diameter of the well wall; The adjustment assembly comprises two groups of hollow arc blocks (300) and elastic strips (302); the hollow arc blocks (300) are mounted on the fixed arc plate (204) and are used for the ends of the elastic strips (302) to penetrate into the interior; An internal thread seat (303) is embedded and installed on the elastic strip (302), a spiral column (305) is connected to the interior of the internal thread seat (303) via a thread, a small bearing (304) is sleeved and fixed on one end of the spiral column (305), and an elastic sheet (301) is fixedly arranged on the small bearing (304).

6. The casing centralizer with resistance reduction function according to claim 5, characterized in that: A limiting rod (306) is fixedly provided on the inner wall of the elastic sheet (301), and a through hole is provided inside the elastic strip (302).

7. The casing centralizer with resistance reduction function according to claim 5, characterized in that: An internal thread ring (308) is embedded and installed on the inner wall of the hollow arc-shaped block (300), and a locking stud (307) is threadedly connected to the interior of the internal thread ring (308).

8. The casing centralizer with resistance reduction function according to claim 3, characterized in that: A rotating member is provided between the two groups of outer rotating rings (200) and is used to drive the outer rotating rings (200) to rotate; The rotating member comprises a vertical rod (400) and a fixing ring (404) sleeved and fixed on the outside of the vertical rod (400).

9. The casing centralizer with resistance reduction function according to claim 8, characterized in that: An upper bevel gear (403) is fixedly provided on the outside of the vertical rod (400), a fixing seat (401) is fixedly provided on the connecting vertical plate (207), a mounting bearing (405) is fixedly provided on the fixing seat (401), and a rotating column (402) is rotatably provided inside the mounting bearing (405).

10. The casing centralizer with resistance reduction function according to claim 9, characterized in that: A lower bevel gear (406) is fixedly disposed at the end of the rotating column (402), a fixed bearing (407) is disposed outside the vertical rod (400), and the fixed bearing (407) is fixed on the fixed seat (401).

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