Drilling-free grading hoop

Abstract

The utility model discloses a drilling-free grading hoop which comprises a drilling-free grading hoop body, a limiting block is fixedly connected to the inner wall of the drilling-free grading hoop body, an opening is formed in the drilling-free grading hoop body, a moving block is slidably connected to the inner wall of the drilling-free grading hoop body, a connecting rod is fixedly connected to the upper side of the moving block, and a driving motor is arranged in the connecting rod. The output end of the driving motor is fixedly connected with a lead screw, the lead screw is in threaded connection with a connecting plate, the connecting plate is fixedly connected with a scraping plate, under the action of an external hydraulic machine, the moving block is pushed through the connecting rod to move up and down in the drilling-free grading hoop body, and the lead screw can rotate by starting the driving motor so as to drive the connecting plate to move up and down; and finally, the scraping plate moves up and down, the scraping plate can collect cement left on the inner wall of the drilling-free grading hoop body downwards, in this way, materials are not wasted, and the step of cleaning the interior of the drilling-free grading hoop body is omitted.

Description

Technical Field

[0001] The utility model relates to the field of cementing equipment, in particular to a drilling-free grading collar. Background Art

[0002] The graded collar is a graded cementing device, which is mainly used in multi-stage cementing projects. It achieves cementing effect by segmented cementing, which can reduce the operation of drilling the inner sleeve of the graded collar after graded cementing, shorten the well construction period, effectively improve the sealing quality of the filling section, extend the production life of the oil well, and improve the comprehensive production value of the oil well.

[0003] However, when the existing drill-free grading hoop is in use, some cement will remain on the inner wall of the drill-free grading hoop after cement pouring, which not only wastes cement materials, but also requires cleaning the inner wall of the drill-free grading hoop, reducing work efficiency, and the upper and lower joint materials of the drill-free grading hoop will cause friction loss to the drill-free grading hoop after long-term use, reducing the service life of the device. Utility Model Content

[0004] The utility model aims to provide a drill-free grading hoop, which solves the problem in the prior art that part of cement will remain on the inner wall of the drill-free grading hoop after cement pouring, which not only wastes cement material but also requires cleaning of the inner wall of the drill-free grading hoop, thereby reducing the work efficiency. The utility model also makes up for the defect that the upper joint and the lower joint materials of the drill-free grading hoop will cause friction loss to the drill-free grading hoop after long-term use, thereby reducing the service life of the device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a drill-free grading hoop, comprising a drill-free grading hoop main body, a moving block is slidably connected to the inner wall of the drill-free grading hoop main body, a connecting rod is fixedly connected to the upper side of the moving block, a driving motor is arranged inside the connecting rod, a lead screw is fixedly connected to the output end of the driving motor, a connecting plate is threadedly connected to the lead screw, and a scraper is fixedly connected to the connecting plate. A limited block is fixedly connected to the inner wall of the drill-free grading hoop main body, an opening is arranged on the drill-free grading hoop main body, an upper joint is threadedly connected to the upper side of the drill-free grading hoop main body, and a lower joint is threadedly connected to the lower side of the drill-free grading hoop main body.

[0006] As a further description of the above technical solution: a pressure sensor is arranged inside the limit block.

[0007] As a further description of the above technical solution: a sliding rod is fixedly connected inside the connecting rod, a sliding block is slidably connected to the sliding rod, and the sliding block is fixedly connected to the connecting plate.

[0008] As a further description of the above technical solution: a cylinder is arranged between the outer wall and the inner wall of the drill-free grading hoop body, and a partition is fixedly connected to the cylinder.

[0009] As a further description of the above technical solution: a feed port is arranged above the moving block, and a discharge port is arranged on the side of the moving block.

[0010] As a further description of the above technical solution: the materials of the upper joint and the lower joint are both silicon nitride.

[0011] The utility model has the following beneficial effects:

[0012] 1. Compared with the prior art, the drill-free grading hoop is provided with a scraper, a driving motor, a lead screw, a sliding rod, a sliding block, and a connecting plate, and the scraper is used to collect the cement remaining on the inner wall of the drill-free grading hoop body 1 downward, which not only does not waste cement materials, but also saves the step of cleaning the inner wall of the drill-free grading hoop;

[0013] 2. Compared with the prior art, the drill-free grading collar replaces the materials of the upper joint and the lower joint with silicon carbide. Silicon nitride is a material that can reduce material friction and wear, which can reduce the friction on the drill-free grading collar and extend the service life of the device.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a three-dimensional schematic diagram of the movable block structure of the utility model.

[0018] Figure 3 It is a three-dimensional schematic diagram of the internal structure of the drill-free grading hoop of the utility model.

[0019] Figure 4 It is a schematic diagram of the internal structure of the connecting rod of the utility model.

[0020] Figure 5 It is a schematic diagram of the internal structure of the inner and outer walls of the drill-free grading hoop of the utility model.

[0021] Legend:

[0022] 1. Drill-free grading hoop body; 2. Upper joint; 3. Lower joint; 4. Opening; 5. Limit block; 6. Connecting rod; 7. Moving block; 8. Discharge port; 9. Connecting plate; 10. Scraper; 11. Feed port; 12. Driving motor; 13. Lead screw; 14. Sliding rod; 15. Sliding block; 16. Pressure sensor; 17. Cylinder; 18. Partition. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] Reference Figure 1-5 The utility model provides an embodiment of a drill-free grading hoop, comprising a drill-free grading hoop main body 1, a moving block 7 is slidably connected to the inner wall of the drill-free grading hoop main body 1, a connecting rod 6 is fixedly connected to the upper side of the moving block 7, a driving motor 12 is arranged inside the connecting rod 6, a lead screw 13 is fixedly connected to the output end of the driving motor 12, a connecting plate 9 is threadedly connected to the lead screw 13, a scraper 10 is fixedly connected to the connecting plate 9, and under the action of an external hydraulic press, the moving block 7 is pushed up and down in the drill-free grading hoop main body 1 through the connecting rod 6, and the lead screw can be rotated by starting the driving motor 12 to drive the connecting plate 9 to move up and down, and finally the scraper 10 is moved up and down, and the scraper 10 can collect the cement remaining on the inner wall of the drill-free grading hoop main body 1 downwards, which not only avoids wasting materials, but also eliminates the step of cleaning the inside of the drill-free grading hoop main body 1.

[0025] The inner wall of the drill-free grading hoop body 1 is fixedly connected to a limiting block 5, an opening 4 is provided on the drill-free grading hoop body 1, an upper joint 2 is threadedly connected to the upper side of the drill-free grading hoop body 1, and a lower joint 3 is threadedly connected to the lower side of the drill-free grading hoop body 1. The limiting block 5 can prevent the moving block 7 from moving too far downward, and the opening 4 is used to discharge cement.

[0026] A pressure sensor 16 is disposed inside the limit block 5 , and the pressure sensor 16 is triggered when the moving block 7 contacts the limit block 5 .

[0027] A sliding rod 14 is fixedly connected inside the connecting rod 6, and a slider 15 is slidably connected to the sliding rod 14. The slider 15 is fixedly connected to the connecting plate 9. The sliding rod 14 and the slider 15 can limit the connecting rod 9 and prevent the connecting rod 9 from rotating with the rotation of the screw 13, thereby ensuring the stability of the device during operation.

[0028] A cylinder 17 is arranged between the outer wall and the inner wall of the drill-free grading hoop body 1 , and a partition 18 is fixedly connected to the cylinder 17 . The cylinder 17 is controlled by a pressure sensor 16 , and the partition 18 is used to block the opening 4 .

[0029] A feed port 11 is provided above the moving block 7 , and a discharge port 8 is provided on the side of the moving block 7 . Cement is discharged from the feed port 11 through the discharge port 8 and then from the opening 4 into the interior of the drill-free grading hoop body 1 .

[0030] The materials of the upper joint 2 and the lower joint 3 are both silicon nitride. Silicon nitride is a material that can reduce material friction and wear. It can provide good lubrication properties and will not increase the hardness and brittleness of the material. Therefore, when installing the upper joint 2 and the lower joint 3, the friction on the drill-free grading collar body 1 can be reduced, thereby extending the service life of the device.

[0031] Working principle: When the device is in use, first, under the action of the external hydraulic press, the moving block 7 is pushed to move downward in the drill-free grading hoop body 1 through the connecting rod 6. When the moving block 7 contacts the limit block 5, the hydraulic press is stopped, and under the action of the pressure sensor 16, the cylinder 17 is controlled to move the partition 18 blocking the opening 4 upward. At this time, cement is introduced, and the cement is discharged from the inside of the drill-free grading hoop body 1 from the feed port 11 through the discharge port 8 and then from the opening 4. When the cement is poured, the drive motor 12 is started to rotate the screw 13, and the connecting plate 9 is moved downward under the limiting action of the slide bar 14 and the slider 15, thereby driving the scraper 10 to move downward. The scraper 10 will collect the cement remaining on the inner wall of the drill-free grading hoop body 1 downward, which not only avoids wasting materials, but also eliminates the step of cleaning the inside of the drill-free grading hoop body 1.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A drill-free grading hoop, comprising a drill-free grading hoop body (1), characterized in that: The inner wall of the drill-free grading hoop body (1) is slidably connected to a moving block (7), the upper side of the moving block (7) is fixedly connected to a connecting rod (6), a driving motor (12) is arranged inside the connecting rod (6), the output end of the driving motor (12) is fixedly connected to a lead screw (13), the lead screw (13) is threadedly connected to a connecting plate (9), and the connecting plate (9) is fixedly connected to a scraper (10); The inner wall of the drill-free grading hoop body (1) is fixedly connected to a limiting block (5); the drill-free grading hoop body (1) is provided with an opening (4); the upper part of the drill-free grading hoop body (1) is threadedly connected to an upper joint (2); and the lower part of the drill-free grading hoop body (1) is threadedly connected to a lower joint (3).

2. The drill-free grading collar according to claim 1, characterized in that: A pressure sensor (16) is arranged inside the limit block (5).

3. The drill-free grading collar according to claim 1, characterized in that: A sliding rod (14) is fixedly connected inside the connecting rod (6), a sliding block (15) is slidably connected to the sliding rod (14), and the sliding block (15) is fixedly connected to the connecting plate (9).

4. The drill-free grading collar according to claim 1, characterized in that: A cylinder (17) is arranged between the outer wall and the inner wall of the drill-free grading collar body (1), and a partition plate (18) is fixedly connected to the cylinder (17).

5. The drill-free grading collar according to claim 1, characterized in that: A material inlet (11) is provided above the moving block (7), and a material outlet (8) is provided on the side of the moving block (7).

6. The drill-free grading collar according to claim 1, characterized in that: The materials of the upper joint (2) and the lower joint (3) are both silicon nitride.

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