Adjustable well cementation casing pipe expanding centralizer

Abstract

The utility model relates to the technical field of casing centralizers, in particular to an adjustable well cementation casing pipe expanding centralizer which comprises a fixing pipe, a lead screw is rotationally connected into the fixing pipe, a fixing disc is fixedly arranged at the top end of the lead screw, a reset spring is fixedly arranged at the bottom end of the fixing disc, and a rotating ring is fixedly arranged at the bottom end of the reset spring. The device has the advantages that the compression degree of the elastic piece can be adjusted by rotating the lead screw, so that the device can be used for well mouths with different diameters, the application range of the device is widened, the lead screw can be rapidly limited and unlimited, and the device is convenient to use and high in practicability. The screw rod is not easy to rotate when being placed, so that the elastic sheet has higher stability when being placed, the device is not easy to shake when moving in a wellhead, and the centralizing effect of the device on the oil well casing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casing centralizers, in particular to an adjustable cementing casing expansion centralizer. Background Art

[0002] Cementing casing is a tubular structure used in the drilling process of oil and gas wells to reinforce the well wall and prevent formation collapse or well wall collapse. Casing centralizers are used to expand the diameter of the cementing casing so that it can be centered in the wellbore and prevent the cementing casing from sticking to the well wall, thereby ensuring the quality of the cementing operation.

[0003] Publication (Announcement) No. CN222066672U discloses a casing centralizer comprising a casing having a plurality of through slots provided therein, wherein elastic sheets are mounted on the through slots. The bottom of the elastic sheet is fixedly connected to the casing, and the top of the elastic sheet is fixedly connected to a movable sleeve. A fixed cylinder coaxially arranged therewith is fixedly sleeved on the inner side of the top of the casing, and a cavity is formed between the outer surface of the fixed cylinder and the inner surface of the casing. The movable sleeve is located within the cavity and can move up and down. This technology discloses that "through the above-mentioned structure, the degree of bending of the elastic sheet can be controlled, thereby adjusting the diameter of the device to adapt to drill holes of different diameters, thereby expanding the application range of the device and increasing the applicability of the device."

[0004] When an existing casing centralizer is in use, the device drives the movable sleeve to move up and down by rotating the threaded barrel, thereby adjusting the bending degree of the elastic sheet. Since the well wall is usually uneven, the elastic sheet will be subjected to the squeezing force and vibration of the well wall during the process of placing the device into the well wall, thereby applying vibration and squeezing to the movable sleeve, thereby applying vibration and squeezing to the casing and the threaded barrel, which can easily cause rotation between the casing and the threaded barrel, and then cause the position of the movable sleeve to change, resulting in a change in the bending degree of the elastic sheet, which reduces the overall diameter of the device and easily causes the cementing casing to shake in the wellhead, thereby reducing the device's straightening effect on the cementing casing.

[0005] In order to solve the above problems, the present application proposes an adjustable cementing casing expansion centralizer. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides an adjustable cementing casing expansion straightener, which can adjust the compression degree of the elastic sheet by rotating the screw rod, thereby adjusting the overall diameter of the device, so that the device can be used for wellheads of different diameters, thereby improving the applicability of the device, and can quickly limit and release the limit of the screw rod, so that the screw rod is not easy to rotate when placed, thereby making the elastic sheet have higher stability when placed, and making the device not easy to shake when moving in the wellhead, thereby improving the characteristics of the device's straightening effect on the oil well casing.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an adjustable cementing casing expansion centralizer, comprising a fixed tube, a screw rod is rotatably connected to the interior of the fixed tube, the top of the screw rod is fixedly provided with a fixed plate, the bottom end of the fixed plate is fixedly provided with a return spring, the bottom end of the return spring is fixedly provided with a rotating ring, the side of the rotating ring is provided with an anti-slip sleeve, the top end of the side of the screw rod is fixedly provided with a plurality of limit blocks, the bottom end of the rotating ring is fixedly provided with a plurality of positioning blocks, the side of the screw rod is threadedly connected to a connecting ring, the side of the connecting ring is fixedly provided with a plurality of mounting seats, two fixed seats are fixedly provided on one side of the plurality of mounting seats, a plurality of rotating rods are provided on the side of the fixed tube, the side surfaces of the plurality of rotating rods are respectively fixedly connected to the interior of the plurality of fixed seats, the side surfaces of the plurality of rotating rods are rotatably connected to elastic sheets, the bottom ends of the inner parts of the plurality of elastic sheets are rotatably connected to rotating shafts, the top of the fixed tube is provided with a plurality of positioning grooves, and the side surfaces of the plurality of positioning blocks are respectively fitted with the interiors of the plurality of positioning grooves.

[0008] As a preferred adjustable cementing casing expansion centralizer of the present invention, a slide groove is provided inside the rotating ring, and the inside of the slide groove fits with the side surface of the screw rod, so that the rotating ring can easily drive the screw rod to rotate.

[0009] As a preferred adjustable cementing casing expansion centralizer of the present invention, a placement groove is provided inside the anti-slip sleeve, and the inside of the placement groove is fixedly connected to the side of the rotating ring, so that the anti-slip sleeve can improve the anti-slip performance of the rotating ring.

[0010] As a preferred adjustable cementing casing expansion straightener of the present invention, a plurality of limit grooves are opened inside the rotating ring, and the interiors of the plurality of limit grooves are respectively slidably connected to the sides of a plurality of limit blocks, and the limit blocks facilitate improving the stability of the rotating ring when it moves up and down.

[0011] As a preferred adjustable cementing casing expansion centralizer of the present invention, a connecting groove is provided inside the fixed tube, and the inside of the connecting groove is slidingly connected to the side of the connecting ring, so that the fixed tube can easily limit the screw rod.

[0012] As a preferred adjustable cementing casing expansion centralizer of the present invention, a plurality of mounting grooves are opened on the side of the fixed pipe, and the interiors of the plurality of mounting grooves are respectively slidably connected to the sides of a plurality of mounting seats, which facilitate the fixing of the fixed seat.

[0013] As a preferred adjustable cementing casing expansion centralizer of the present invention, a plurality of fixing holes are opened inside the fixing pipe, and the interiors of the plurality of fixing holes are fixedly connected to the sides of a plurality of rotating shafts respectively, and the rotating shafts facilitate the rotation of the elastic sheet.

[0014] The utility model provides a kind of adjustable well cementation casing pipe expansion pipe centralizer, the inside of the connecting ring is slidably connected with several slide rods, the side of several slide rods is fixedly connected with the inside of fixed tube, and slide rod is convenient for improving the stability when moving up and down on connecting ring.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1、When the overall diameter of the device needs to be adjusted, move the rotating ring upwards, thereby driving the positioning blocks to move upwards, driving the rotating ring to rotate, thereby driving the limiting blocks and the lead screw to rotate, thereby driving the connecting ring, mounting seat, fixed seat and rotating rod to move upwards, thereby driving the top ends of the elastic sheets to move upwards, reducing the compression degree of the elastic sheets, thereby reducing the overall diameter of the device, reversing the rotating ring, thereby driving the lead screw to reverse, thereby driving the connecting ring, mounting seat, fixed seat and rotating rod to move downwards, thereby driving the top ends of the elastic sheets to move downwards, increasing the compression degree of the elastic sheets, thereby increasing the overall diameter of the device, so that the diameter of the device can be adjusted, after the device is adjusted, loosen the rotating ring, and push the rotating ring and the positioning blocks downwards by the reset spring, so that the positioning blocks enter the inside of the corresponding positioning grooves, so that the rotating ring, limiting blocks and lead screw are limited, thereby limiting the movement of the connecting ring, mounting seat and fixed seat, so that the elastic sheets are limited, thereby improving the stability of the elastic sheets when placed, the device can adjust the compression degree of the elastic sheets by rotating the lead screw, thereby adjusting the overall diameter of the device, so that the device can be used for wellheads of different diameters, improving the application range of the device, and the lead screw can be quickly limited and released, so that the lead screw is not easy to rotate when placed, thereby improving the stability of the elastic sheets when placed, so that the device is not easy to shake when moving in the wellhead, thereby improving the centralizing effect of the device on the oil well casing. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, together with embodiments of the utility model, to explain the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0018] Figure 1 It is the overall structure schematic diagram of the utility model;

[0019] Figure 2 It is the inside structure schematic diagram of the fixed tube of the utility model;

[0020] Figure 3 It is the mounting structure schematic diagram of the rotating ring of the utility model;

[0021] Figure 4 It is the structure schematic diagram of A of the utility model Figure 2 .

[0022] In the picture:

[0023] 1. Fixed tube; 2. Screw rod; 3. Fixed plate; 4. Return spring; 5. Rotating ring; 6. Anti-slip sleeve; 7. Limit block; 8. Positioning block; 9. Connecting ring; 10. Mounting seat; 11. Fixed seat; 12. Rotating rod; 13. Elastic sheet; 14. Rotating shaft; 15. Sliding rod; 16. Positioning slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1

[0026] like Figures 1-4 As shown;

[0027] An adjustable cementing casing expansion centralizer comprises a fixed pipe 1.

[0028] After checking, the disclosure (announcement) number: CN222066672U discloses a casing centralizer. In order to solve the existing problems existing in this prior art, as disclosed in the background technology above, "the existing casing centralizer drives the movable sleeve to move up and down by rotating the threaded barrel, so as to adjust the bending degree of the elastic sheet. Since the well wall is usually uneven, in the process of placing the device into the well wall, the elastic sheet will be squeezed and vibrated by the well wall, thereby exerting vibration and compression on the movable sleeve, thereby exerting vibration and compression on the casing and the threaded barrel, which is likely to cause rotation between the casing and the threaded barrel, and then causing the position of the movable sleeve to change, resulting in a change in the bending degree of the elastic sheet, making the overall diameter of the device smaller, and easily causing the cementing casing to shake in the wellhead, thereby reducing the device's effect on the cementing casing." In terms of combined use, this problem is obviously a real and difficult problem to solve. Therefore, in order to solve this technical problem, a screw rod and a rotating ring are added to this application document;

[0029] More specifically:

[0030] like Figures 1 to 4 As shown:

[0031] In combination with the above content: the internal rotation connection of the fixed tube 1 is provided with a screw rod 2, the top of the screw rod 2 is fixedly provided with a fixed plate 3, the bottom end of the fixed plate 3 is fixedly provided with a return spring 4, the bottom end of the return spring 4 is fixedly provided with a rotating ring 5, and the side of the rotating ring 5 is provided with an anti-slip sleeve 6. The top of the side of the screw rod 2 is fixedly provided with a plurality of limit blocks 7, and the bottom end of the rotating ring 5 is fixedly provided with a plurality of positioning blocks 8. The side of the screw rod 2 is threadedly connected with a connecting ring 9, and the side of the connecting ring 9 is fixedly provided with a plurality of mounting seats 10. Two fixed seats 11 are fixed on one side of the plurality of mounting seats 10, and a plurality of rotating rods 12 are provided on the side of the fixed tube 1. The sides of the plurality of rotating rods 12 are respectively fixedly connected to the interior of the plurality of fixed seats 11, and the sides of the plurality of rotating rods 12 are rotatably connected with elastic sheets 13, and the bottom ends of the internal parts of the plurality of elastic sheets 13 are rotatably connected with rotating shafts 14. The top of the fixed tube 1 is provided with a plurality of positioning grooves 16, and the sides of the plurality of positioning blocks 8 are respectively fitted with the interiors of the plurality of positioning grooves 16.

[0032] In this embodiment, when the overall diameter of the device needs to be adjusted, the rotating ring 5 is moved upward, thereby driving the positioning blocks 8 to move upward, so that the positioning blocks 8 are disengaged from the positioning grooves 16. At this time, the rotating ring 5 loses its limit and can be rotated, driving the rotating ring 5 to rotate, thereby driving the limiting blocks 7 to rotate, thereby driving the screw rod 2 to rotate, thereby driving the connecting ring 9 to move upward, thereby driving the mounting seats 10 to move upward, thereby driving the fixing seats 11 to move upward, thereby driving the rotating rods 12 to move upward, thereby driving the top ends of the elastic sheets 13 to move upward, so that the compression degree of the elastic sheets 13 is reduced, thereby reducing the overall diameter of the device, driving the rotating ring 5 to reverse, thereby driving the screw rod 2 to reverse, thereby driving the connecting ring 9 to move downward, thereby driving the mounting seats 10 to move downward, thereby driving the fixing seats 11 to move downward, thereby driving the rotating rods 12 to move downward, thereby driving the top ends of the elastic sheets 13 to move downward, so that the compression degree of the elastic sheets 13 is increased, thereby increasing the overall diameter of the device. The diameter of the device is adjustable, which is convenient for improving the applicability of the device. When the device is adjusted, the rotating ring 5 is loosened, and the rotating ring 5 and several positioning blocks 8 are pushed downward by the return spring 4, so that the positioning blocks 8 enter the corresponding positioning grooves 16. The positioning blocks 8 are limited by the positioning grooves 16, so that the rotating ring 5 cannot rotate, thereby limiting the limiting blocks 7 and the screw rod 2 and preventing them from rotating, thereby limiting the connecting ring 9, the mounting seat 10 and the fixing seat 11 and preventing them from moving, thereby limiting the elastic sheet 13 and preventing it from moving, which is convenient for improving the stability of the elastic sheet 13 when placed. The device can adjust the compression degree of the elastic sheet 13 by rotating the screw rod 2, thereby adjusting the overall diameter of the device, so that the device can be used for wellheads of different diameters, thereby improving the applicability of the device, and can quickly limit and release the limit on the screw rod 2, so that the screw rod 2 is not easy to rotate when placed, thereby making the elastic sheet 13 have higher stability when placed, and making the device not easy to shake when moving in the wellhead, thereby improving the device's straightening effect on the oil well casing.

[0033] In an optional embodiment, a sliding groove is provided inside the rotating ring 5 , and the inside of the sliding groove fits with the side surface of the screw rod 2 .

[0034] In this embodiment, the rotating ring 5 is convenient for driving the screw rod 2 to rotate.

[0035] In an optional embodiment, a placement groove is provided inside the anti-slip sleeve 6 , and the inside of the placement groove is fixedly connected to the side surface of the rotating ring 5 .

[0036] In this embodiment, the anti-slip sleeve 6 is convenient for improving the anti-slip performance of the rotating ring 5 .

[0037] In an optional embodiment, a plurality of limiting grooves are provided inside the rotating ring 5 , and the interiors of the plurality of limiting grooves are respectively slidably connected to the side surfaces of the plurality of limiting blocks 7 .

[0038] In this embodiment, the limiting block 7 is used to improve the stability of the rotating ring 5 when it moves up and down.

[0039] In an optional embodiment, a connecting groove is provided inside the fixing tube 1 , and the inside of the connecting groove is slidably connected to the side surface of the connecting ring 9 .

[0040] In this embodiment, the fixed tube 1 is convenient for limiting the position of the screw rod 2 .

[0041] In an optional embodiment, a plurality of mounting grooves are formed on the side surface of the fixing tube 1 , and the interiors of the plurality of mounting grooves are slidably connected to the side surfaces of the plurality of mounting seats 10 .

[0042] In this embodiment, the mounting seat 10 facilitates fixing the fixing seat 11 .

[0043] In an optional embodiment, a plurality of fixing holes are opened inside the fixing tube 1 , and the interiors of the plurality of fixing holes are fixedly connected to the side surfaces of the plurality of rotating shafts 14 , respectively.

[0044] In this embodiment, the rotating shaft 14 facilitates the rotation of the elastic piece 13 .

[0045] In an optional embodiment, a plurality of sliding rods 15 are slidably connected to the interior of the connecting ring 9 , and the side surfaces of the plurality of sliding rods 15 are fixedly connected to the interior of the fixed tube 1 .

[0046] In this embodiment, the slide bar 15 is used to improve the stability of the connecting ring 9 when it moves up and down.

[0047] The working principle and usage process of the present invention are as follows: when the overall diameter of the device needs to be adjusted, the rotating ring 5 is moved upward, thereby driving the positioning blocks 8 to move upward, so that the positioning blocks 8 are disengaged from the positioning grooves 16. At this time, the rotating ring 5 loses its limit and can be rotated, driving the rotating ring 5 to rotate, thereby driving the limiting blocks 7 to rotate, thereby driving the screw rod 2 to rotate, thereby driving the connecting ring 9 to move upward, thereby driving the mounting seats 10 to move upward, thereby driving the fixing seats 11 to move upward, thereby driving the rotating rods 12 to move upward, thereby driving the top ends of the elastic sheets 13 to move upward, so that the compression degree of the elastic sheets 13 is reduced, thereby reducing the overall diameter of the device, driving the rotating ring 5 to reverse, thereby driving the screw rod 2 to reverse, thereby driving the connecting ring 9 to move downward, thereby driving the mounting seats 10 to move downward, thereby driving the fixing seats 11 to move downward, thereby driving the rotating rods 12 to move downward, thereby driving the top ends of the elastic sheets 13 to move downward, so that the compression degree of the elastic sheets 13 is increased, thereby increasing the overall diameter of the device. The diameter is increased, so that the diameter of the device is adjustable, which is convenient for improving the applicability of the device. When the device is adjusted, the rotating ring 5 is loosened, and the rotating ring 5 and several positioning blocks 8 are pushed downward by the return spring 4, so that the positioning blocks 8 enter the corresponding positioning grooves 16. The positioning blocks 8 are limited by the positioning grooves 16, so that the rotating ring 5 cannot rotate, thereby limiting the limiting blocks 7 and the screw rod 2 and preventing them from rotating, thereby limiting the connecting ring 9, the mounting seat 10 and the fixing seat 11 and preventing them from moving, thereby limiting the elastic sheet 13 and preventing it from moving, which is convenient for improving the stability of the elastic sheet 13 when it is placed. The device can adjust the compression degree of the elastic sheet 13 by rotating the screw rod 2, thereby adjusting the overall diameter of the device, so that the device can be used for wellheads of different diameters, thereby improving the applicability of the device, and can quickly limit and release the limit on the screw rod 2, so that the screw rod 2 is not easy to rotate when placed, thereby making the elastic sheet 13 have higher stability when placed, and making the device not easy to shake when moving in the wellhead, thereby improving the device's straightening effect on the oil well casing.

[0048] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An adjustable cementing casing expansion centralizer, comprising a fixed pipe (1), characterized in that: The fixing tube (1) is internally connected to a screw rod (2), the top end of the screw rod (2) is fixed with a fixing plate (3), the bottom end of the fixing plate (3) is fixed with a return spring (4), the bottom end of the return spring (4) is fixed with a rotating ring (5), the side of the rotating ring (5) is provided with an anti-slip sleeve (6), the top end of the side of the screw rod (2) is fixed with a plurality of limit blocks (7), the bottom end of the rotating ring (5) is fixed with a plurality of positioning blocks (8), the side of the screw rod (2) is threadedly connected with a connecting ring (9), and the side of the connecting ring (9) is fixed with a plurality of mounting seats (1 0), two fixing seats (11) are fixedly provided on one side of several mounting seats (10), several rotating rods (12) are provided on the side of the fixing tube (1), the side surfaces of several rotating rods (12) are respectively fixedly connected to the inside of several fixing seats (11), the side surfaces of several rotating rods (12) are rotatably connected to elastic sheets (13), the bottom ends of several elastic sheets (13) are rotatably connected to rotating shafts (14), the top end of the fixing tube (1) is provided with several positioning grooves (16), and the side surfaces of several positioning blocks (8) are respectively fitted with the inside of several positioning grooves (16).

2. The adjustable cementing casing expansion centralizer according to claim 1, characterized in that: A sliding groove is provided inside the rotating ring (5), and the inside of the sliding groove fits in contact with the side surface of the screw rod (2).

3. The adjustable cementing casing expansion centralizer according to claim 1, characterized in that: A placement groove is provided inside the anti-slip sleeve (6), and the inside of the placement groove is fixedly connected to the side surface of the rotating ring (5).

4. The adjustable cementing casing expansion centralizer according to claim 1, characterized in that: A plurality of limiting grooves are provided inside the rotating ring (5), and the interiors of the plurality of limiting grooves are respectively slidably connected to the side surfaces of the plurality of limiting blocks (7).

5. The adjustable cementing casing expansion centralizer according to claim 1, characterized in that: A connecting groove is provided inside the fixing tube (1), and the inside of the connecting groove is slidably connected to the side surface of the connecting ring (9).

6. The adjustable cementing casing expansion centralizer according to claim 1, characterized in that: A plurality of mounting grooves are provided on the side surface of the fixing tube (1), and the interiors of the plurality of mounting grooves are respectively slidably connected to the side surfaces of the plurality of mounting seats (10).

7. The adjustable cementing casing expansion centralizer according to claim 1, characterized in that: A plurality of fixing holes are provided inside the fixing tube (1), and the interiors of the plurality of fixing holes are fixedly connected to the side surfaces of the plurality of rotating shafts (14) respectively.

8. The adjustable cementing casing expansion centralizer according to claim 1, characterized in that: The interior of the connecting ring (9) is slidably connected to a plurality of sliding rods (15), and the side surfaces of the plurality of sliding rods (15) are fixedly connected to the interior of the fixed tube (1).

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