Spiral casing scraper

Abstract

The utility model relates to a spiral casing scraper, which belongs to the technical field of casing scrapers and comprises a fixing seat, a lifting rod and a rotating rod, a fixing structure is arranged on the upper surface of the fixing seat, and a scraper mechanism is detachably mounted on the outer surface of the rotating rod. The fixing structure comprises a knob, a bidirectional lead screw, a sliding seat and a clamp; the scraping blade mechanism comprises a shell, a mounting sleeve, a connecting rod, a scraping blade, a driving motor, a transmission gear, a rotating disc and a gear ring, one end of the connecting rod is fixed to the outer surface of the scraping blade, a sliding rod in sliding connection with the rotating disc is rotationally mounted at the other end of the connecting rod, and a sliding groove matched with the sliding rod is formed in the rotating disc. According to the spiral casing pipe scraper, the driving motor drives the transmission gear to rotate, the transmission gear rotates and is meshed with the gear ring to drive the rotating disc, the rotating disc rotates to enable the connecting rod to displace through sliding fit of the sliding groove and the sliding rod, the position of the scraping piece is adjusted, then using of pipelines with different diameters is achieved, and the advantages of being high in practicability and flexibility are achieved.

Description

Technical Field

[0001] This utility model relates to the field of casing scraper technology, specifically a spiral casing scraper. Background Technology

[0002] After cementing and removing the ash plug in oil and gas wells, cement residue usually remains on the inner wall of the casing section, making the inner wall of that section rough and irregular, which adversely affects subsequent well completion operations. Additionally, when installing bridge plugs or performing staged fracturing in a section of casing, it is also necessary to scrape and clean the inner wall of the working casing section, requiring the use of a casing scraper. The casing scraper cuts the inner wall of the casing, removing cement, hard wax, salt deposits, and burrs from the perforations. It is an important step in well workover operations and normal downhole operations, ensuring the proper insertion and normal operation of downhole tools before proceeding to the next stage of construction.

[0003] A search revealed that patent document CN216617480U discloses a hydraulically operated spiral sleeve scraper, comprising: a rotating rod; a mounting groove disposed inside the rotating rod, wherein a hydraulic cylinder is disposed inside the mounting groove; a fixing column disposed at the top of the rotating rod, wherein a clamp is disposed at the top of the fixing column; and a mounting post disposed on the outer surface of the rotating rod, wherein a scraper is disposed on the outer surface of the mounting post. This utility model provides a hydraulically operated spiral sleeve scraper, in which the rotation and extension of the hydraulic cylinder drive the rotating rod to rotate and move, thereby causing the scraper on the surface of the mounting post to scrape the inner wall of the sleeve.

[0004] The aforementioned patent has the following shortcomings: the diameter of the scraper cannot be adjusted, and the fixed diameter of the scraper means that it can only be used for sleeves of a specific size. If the inner diameter of the sleeve changes, the scraper may not be able to fit tightly against the inner wall of the sleeve, resulting in poor cleaning effect. This cleaning method may only be applicable to certain specific application scenarios. For occasions that require cleaning sleeves of different sizes, this method may not meet the requirements. Therefore, a spiral sleeve scraper is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a spiral sleeve scraper, which has the advantages of strong practicality and high flexibility, and solves the problem of the inability to adjust the diameter of the scraper blade.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a spiral sleeve scraper, comprising a fixed base, a lifting rod and a rotating rod, wherein the upper surface of the fixed base is provided with a fixing structure, and the outer surface of the rotating rod is detachably equipped with a scraper mechanism;

[0007] The fixing structure includes a knob, a two-way lead screw, a slide block, and a clamp;

[0008] The scraper mechanism includes a housing, a mounting sleeve, a connecting rod, a scraper, a drive motor, a transmission gear, a turntable, and a gear ring. One end of the connecting rod is fixed to the outer surface of the scraper, and the other end of the connecting rod is rotatably mounted with a slide rod that is slidably connected to the turntable. The turntable has a groove inside that matches the slide rod.

[0009] Furthermore, the lifting rod includes a sleeve and a hydraulic telescopic rod. The sleeve is hollow inside, and the hydraulic telescopic rod is fixedly installed inside the sleeve. The top end of the rotating rod is connected and fixed to the output end of the hydraulic telescopic rod.

[0010] Furthermore, the sleeve is disposed below the fixed base, and a drive device extending outward and fixedly connected to the top end of the sleeve is fixedly installed inside the fixed base.

[0011] Furthermore, the upper surface of the fixed base is provided with an installation groove, the knob is rotatably mounted on the outer surface of the fixed base, the bidirectional lead screw bearing is installed in the installation groove, and one end of the bidirectional lead screw is connected and fixed to the outer surface of the knob.

[0012] Furthermore, the threads on the bidirectional lead screw are arranged in opposite directions, and there are two slides and two clamps, with the two clamps respectively welded to the upper surfaces of the two slides.

[0013] Furthermore, the housing is hollow inside, the mounting sleeve is welded to the lower surface of the housing, and a positioning rod that is inserted and fixed to the rotating rod is installed inside it. The housing and the turntable have coaxially arranged and outwardly communicating through holes inside.

[0014] Furthermore, the turntable is rotatably installed inside the housing, and the side wall of the housing is provided with a telescopic hole communicating with the outside. One end of the connecting rod extends through the telescopic hole to the outside of the housing. The transmission gear is fixedly installed on the output shaft of the drive motor. The transmission gear meshes with the gear ring, and the gear ring is fixedly installed on the outer surface of the turntable. A guide groove is provided on the side of the connecting rod near the telescopic hole.

[0015] Furthermore, the number of connecting rods, scrapers, sliding rods, sliding grooves, and telescopic holes are all four, and the four connecting rods and scrapers are equidistantly arranged around the perimeter of the housing.

[0016] Compared with the prior art, this utility model provides a spiral sleeve scraper, which has the following characteristics:

[0017] Beneficial effects:

[0018] 1. This spiral sleeve scraper is driven by a motor to rotate the transmission gear. The rotation of the transmission gear meshes with the gear ring to drive the turntable. The rotation of the turntable causes the connecting rod to move through the sliding engagement of the slide groove and the slide rod, thereby realizing the position adjustment of the scraper blade. This allows it to be used with pipes of different diameters, achieving advantages such as high practicality and high flexibility, and solving the problem of the inability to adjust the diameter of the scraper blade.

[0019] 2. This spiral casing scraper is installed in a fixed position through a fixed structure. The hydraulic telescopic rod is controlled by an external power source to drive the rotating rod to move, so that the scraper blade cleans the inner wall of the casing. At the same time, the output shaft of the drive equipment is rotated by an external power source to drive the rotating rod to rotate, so that the scraper blade moves while rotating, thereby cleaning the surface of the inner wall of the casing. Attached Figure Description

[0020] Figure 1 This is a perspective view of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the fixing structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the scraper mechanism of this utility model;

[0023] Figure 4 This is a cross-sectional view of the scraper mechanism of this utility model.

[0024] In the diagram: 1. Fixed base; 2. Lifting rod; 201. Sleeve; 202. Hydraulic telescopic rod; 3. Rotating rod; 4. Fixed structure; 401. Knob; 402. Two-way lead screw; 403. Slide block; 404. Clamp; 5. Scraper mechanism; 501. Housing; 502. Mounting sleeve; 503. Connecting rod; 504. Scraper; 505. Drive motor; 506. Transmission gear; 507. Turntable; 508. Gear ring; 509. Slide rod; 510. Slide groove; 511. Guide groove; 512. Telescopic hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] Please see Figures 1 to 2A spiral sleeve scraper includes a fixed base 1, a lifting rod 2, and a rotating rod 3. The upper surface of the fixed base 1 is provided with a fixing structure 4. The lifting rod 2 includes a sleeve 201 and a hydraulic telescopic rod 202. The sleeve 201 is hollow inside, and the hydraulic telescopic rod 202 is fixedly installed inside the sleeve 201. The top end of the rotating rod 3 is connected and fixed to the output end of the hydraulic telescopic rod 202.

[0028] The sleeve 201 is positioned below the fixed base 1. Inside the fixed base 1, a drive device extending outwards and connected to the top of the sleeve 201 is fixedly installed. The drive device is fixedly mounted on the lower surface of the fixed base 1. An external power source controls the hydraulic telescopic rod 202 to move the rotating rod 3, causing the scraper 504 to clean the inner wall of the sleeve. Simultaneously, an external power source controls the output shaft of the drive device to rotate, causing the rotating rod 3 to rotate, thus cleaning the inner wall surface of the sleeve while the scraper rotates and moves.

[0029] Specifically, the fixing structure 4 includes a knob 401, a bidirectional lead screw 402, a slide 403, and a clamp 404. The upper surface of the fixing base 1 has a mounting groove. The knob 401 is rotatably mounted on the outer surface of the fixing base 1. The bidirectional lead screw 402 is bearing-mounted within the mounting groove, and one end of the bidirectional lead screw 402 is connected and fixed to the outer surface of the knob 401. The threads on the bidirectional lead screw 402 are arranged in opposite directions. There are two slides 403 and two clamps 404, with each clamp 404 welded to the upper surface of one slide 403.

[0030] Example 2:

[0031] Please see Figure 1 , Figure 3 and Figure 4 Based on Embodiment 1, a scraper mechanism 5 is detachably installed on the outer surface of the rotating rod 3; the scraper mechanism 5 includes a housing 501, a mounting sleeve 502, a connecting rod 503, a scraper 504, a drive motor 505, a transmission gear 506, a turntable 507, and a gear ring 508. One end of the connecting rod 503 is fixed to the outer surface of the scraper 504, and the other end of the connecting rod 503 is rotatably installed with a slide rod 509 that is slidably connected to the turntable 507. A groove 510 adapted to the slide rod 509 is opened inside the turntable 507. The turntable 507 is rotatably mounted inside the housing 501. A telescopic hole 512 communicating with the outside is provided on the side wall of the housing 501. One end of the connecting rod 503 extends through the telescopic hole 512 to the outside of the housing 501. The transmission gear 506 is fixedly mounted on the output shaft of the drive motor 505. The transmission gear 506 meshes with the gear ring 508, and the gear ring 508 is fixedly mounted on the outer surface of the turntable 507. A guide groove 511 is provided on the side of the connecting rod 503 near the telescopic hole 512.

[0032] Specifically, the housing 501 is hollow inside. The mounting sleeve 502 is welded to the lower surface of the housing 501, and a positioning rod is installed inside it, which is inserted and fixed to the rotating rod 3. The rotating rod 3 has multiple positioning holes that match the positioning rod, allowing for position adjustment of the scraper mechanism 5. The housing 501 and the turntable 507 have coaxially arranged and outwardly communicating through holes inside. There are four connecting rods 503, scrapers 504, slide rods 509, slide grooves 510, and telescopic holes 512, and the four connecting rods 503 and scrapers 504 are equidistantly arranged around the perimeter of the housing 501. The slide groove 510 has an arc shape. A guide block is installed inside the telescopic hole 512, which slides and engages with the guide groove 511, allowing for linear displacement of the connecting rod 503. The drive motor 505 is fixedly installed inside the housing 501.

[0033] In this embodiment, the scraper 504 is in the shape of a quarter circle. The drive motor 505 drives the transmission gear 506 to rotate. The rotation of the transmission gear 506 meshes with the gear ring 508 to drive the turntable 507. The rotation of the turntable 507 causes the connecting rod 503 to move through the sliding engagement of the slide groove 510 and the slide rod 509, thereby realizing the position adjustment of the scraper 504 and enabling the use of pipes with different diameters.

[0034] The working principle of the above embodiments is as follows:

[0035] In use, the device is first installed in a fixed position via the fixing structure 4. An external power source controls the hydraulic telescopic rod 202 to move the rotating rod 3, causing the scraper 504 to clean the inner wall of the casing. Simultaneously, the external power source controls the output shaft of the drive equipment to rotate, causing the rotating rod 3 to rotate, thus cleaning the inner surface of the casing while the scraper rotates and moves. When the scraper 504 needs adjustment, the drive motor 505 drives the transmission gear 506 to rotate. The rotating transmission gear 506 meshes with the gear ring 508, driving the turntable 507. The rotation of the turntable 507, through the sliding engagement of the sliding groove 510 and the sliding rod 509, causes the connecting rod 503 to move, thereby adjusting the position of the scraper 504 and enabling the use of pipes of different diameters.

[0036] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] 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 spiral sleeve scraper, comprising a fixed base (1), a lifting rod (2), and a rotating rod (3), characterized in that: The upper surface of the fixed base (1) is provided with a fixed structure (4), and the outer surface of the rotating rod (3) is detachably equipped with a scraper mechanism (5); The fixing structure (4) includes a knob (401), a two-way lead screw (402), a slide (403), and a clamp (404); The scraper mechanism (5) includes a housing (501), a mounting sleeve (502), a connecting rod (503), a scraper (504), a drive motor (505), a transmission gear (506), a turntable (507), and a gear ring (508). One end of the connecting rod (503) is fixed to the outer surface of the scraper (504), and the other end of the connecting rod (503) is rotatably mounted with a slide rod (509) that is slidably connected to the turntable (507). The turntable (507) has a groove (510) inside that is adapted to the slide rod (509).

2. The spiral sleeve scraper according to claim 1, characterized in that: The lifting rod (2) includes a sleeve (201) and a hydraulic telescopic rod (202). The sleeve (201) is hollow inside, and the hydraulic telescopic rod (202) is fixedly installed inside the sleeve (201). The top end of the rotating rod (3) is connected and fixed to the output end of the hydraulic telescopic rod (202).

3. A spiral sleeve scraper according to claim 2, characterized in that: The sleeve (201) is disposed below the fixed base (1), and a drive device extending outward and connected to the top of the sleeve (201) is fixedly installed inside the fixed base (1).

4. A spiral sleeve scraper according to claim 1, characterized in that: The upper surface of the fixed base (1) is provided with an installation groove. The knob (401) is rotatably installed on the outer surface of the fixed base (1). The bidirectional lead screw (402) is installed in the installation groove, and one end of the bidirectional lead screw (402) is connected and fixed to the outer surface of the knob (401).

5. A spiral sleeve scraper according to claim 1, characterized in that: The threads on the bidirectional lead screw (402) are arranged in opposite directions. There are two slides (403) and two clamps (404). The two clamps (404) are respectively welded to the upper surface of the two slides (403).

6. A spiral sleeve scraper according to claim 1, characterized in that: The housing (501) is hollow inside. The mounting sleeve (502) is welded to the lower surface of the housing (501) and has a positioning rod that is inserted and fixed to the rotating rod (3) inside. The housing (501) and the turntable (507) have coaxially arranged and outwardly communicating through holes inside.

7. A spiral sleeve scraper according to claim 1, characterized in that: The turntable (507) is rotatably mounted inside the housing (501). The side wall of the housing (501) is provided with a telescopic hole (512) communicating with the outside. One end of the connecting rod (503) extends through the telescopic hole (512) to the outside of the housing (501). The transmission gear (506) is fixedly mounted on the output shaft of the drive motor (505). The transmission gear (506) meshes with the gear ring (508), and the gear ring (508) is fixedly mounted on the outer surface of the turntable (507). The connecting rod (503) is provided with a guide groove (511) on the side near the telescopic hole (512).

8. A spiral sleeve scraper according to claim 7, characterized in that: The number of connecting rods (503), scrapers (504), slide rods (509), slide grooves (510) and telescopic holes (512) are all four, and the four connecting rods (503) and scrapers (504) are equidistantly arranged around the perimeter of the housing (501).

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