Composite blowout preventer of sucker rod

Abstract

The sucker rod composite blowout preventer comprises a blowout prevention barrel, arc-shaped grooves are formed in the inner walls of the left side and the right side of the blowout prevention barrel, rectangular boxes are arranged at the inner bottoms of the two arc-shaped grooves, rectangular blocks are connected into the two rectangular boxes in a sealed and sliding mode, arc-shaped blocks are fixedly connected to the adjacent sides of the two rectangular blocks, and the arc-shaped blocks are connected with the arc-shaped grooves. The adjacent sides of the two arc-shaped blocks are fixedly connected with arc-shaped rubber, the sides, away from the arc-shaped rubber, of the two rectangular boxes communicate with hydraulic oil pipes, and the sides, away from the rectangular boxes, of the two hydraulic oil pipes extend to the outside. The anti-blowout device has the advantages that two-layer sealing can be achieved through the arrangement of the arc-shaped rubber and the annular sealing ring, the possibility of crude oil leakage is greatly avoided, the anti-blowout barrel can be recycled through the arrangement of the rotating bolt, and meanwhile crude oil on a sucker rod can be completely scraped away as much as possible through the arrangement of the multiple scrapers.

Description

Technical Field

[0001] The utility model relates to the technical field of oil well tools, in particular to a sucker rod composite blowout preventer. Background Art

[0002] When repairing an oil well that uses a sucker rod to pump oil, the sucker rod must be pulled out of the well or lowered into the well from the ground. The sucker rod can be made of a single rod of about 9 meters, and hundreds of sucker rods must be pulled in and out of each well. Before or during the process of pulling in and out the sucker rods, the wellhead pressure will be higher than the ground pressure. Currently, the wellhead is open when the sucker rod is pulled in and out. When the wellhead pressure is higher than the ground pressure, a blowout accident will occur.

[0003] In order to avoid the occurrence of blowout accidents, a self-sealing device is usually installed at the wellhead. Due to the high pressure generated when a blowout occurs, in order to prevent the pressure from blowing the self-sealing device away, the self-sealing device is usually embedded directly into the ground, resulting in the self-sealing device being difficult to remove after the oil well is pumped out, making it impossible to recycle the self-sealing device. In addition, during the long-term use of the existing self-sealing device, the sealing device will experience certain wear, which may cause crude oil to leak out and affect the surrounding environment. Therefore, it is necessary to design a sucker rod composite blowout preventer to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a sucker rod composite blowout preventer.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A sucker rod composite blowout preventer comprises a blowout preventer, wherein the inner walls on the left and right sides of the blowout preventer are provided with arc grooves, the inner bottoms of the two arc grooves are provided with rectangular boxes, the two rectangular boxes are sealed and slidably connected with rectangular blocks, the adjacent sides of the two rectangular blocks are fixedly connected with arc blocks, the adjacent sides of the two arc blocks are fixedly connected with arc rubbers, the two rectangular boxes are connected with hydraulic oil pipes on one side away from the arc rubbers, and the two hydraulic oil pipes extend to the outside on one side away from the rectangular boxes, the upper end of the blowout preventer is fixedly connected with a plurality of electric telescopic rods, the telescopic ends of the plurality of electric telescopic rods are fixedly connected with a fixing ring, and the lower end of the fixing ring is fixedly connected with an annular sealing ring.

[0007] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: L-shaped plates are provided on the left and right sides of the blowout preventer, multiple anchor bolts are provided on the two L-shaped plates, rotating bolts are provided on the two L-shaped plates, threaded holes are provided on the left and right sides of the blowout preventer, and each rotating bolt is threadedly connected to the corresponding threaded hole.

[0008] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: a circular ring is fixedly connected to the lower end of the blowout preventer, a plurality of fixed rods are fixedly connected to the lower end of the circular ring, a scraper is fixedly connected to each of the fixed rods, there are ten scrapers, the plurality of scrapers are inclined, and the plurality of scrapers are distributed in a circular array.

[0009] The utility model has the advantages that, by arranging the annular sealing ring and the arc-shaped rubber, when a blowout occurs during the raising and lowering of the sucker rod, the two arc-shaped rubbers can tightly wrap the sucker rod, and at the same time, the annular sealing ring seals the upper end of the blowout preventer, thereby avoiding the occurrence of a blowout accident; when installing the blowout preventer, the two L-shaped plates are fixed to the blowout preventer by rotating bolts, and then a plurality of anchor bolts are inserted into the soil, and the two L-shaped plates are buried with concrete, thereby avoiding the blowout preventer from being blown away by the pressure of the blowout, and the blowout preventer can be removed and recycled by removing the rotating bolts later; by arranging a plurality of scrapers, the plurality of scrapers can scrape the crude oil on the sucker rod as much as possible during the upward movement of the sucker rod, thereby avoiding the subsequent situation where the crude oil drips everywhere. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural schematic diagram of a sucker rod composite blowout preventer proposed by the utility model;

[0011] Figure 2 for Figure 1 A partial cross-sectional view of

[0012] Figure 3 for Figure 2 Enlarged structural diagram at A in the middle.

[0013] In the figure: 1 blowout preventer, 2 electric telescopic rod, 3 fixing ring, 4 annular sealing ring, 5 hydraulic oil pipe, 6 L-type plate, 7 anchor bolt, 8 rotating bolt, 9 circular ring, 10 fixing rod, 11 scraper, 12 arc rubber, 13 arc block, 14 rectangular box, 16 rectangular block. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0015] Reference Figure 1-Figure 3As shown, a sucker rod composite blowout preventer includes a blowout preventer 1, arc grooves are provided on the inner walls of the left and right sides of the blowout preventer 1, rectangular boxes 14 are provided at the inner bottoms of the two arc grooves, rectangular blocks 16 are sealed and slidably connected in the two rectangular boxes 14, arc blocks 13 are fixedly connected to the adjacent sides of the two rectangular blocks 16, arc rubbers 12 are fixedly connected to the adjacent sides of the two arc blocks 13, hydraulic oil pipes 5 are connected to the sides of the two rectangular boxes 14 away from the arc rubbers 12, and the two hydraulic oil pipes 5 are away from the rectangular boxes. One side of 14 extends to the outside, and an external hydraulic oil tank is required. The hydraulic oil pipe 5 is connected to the hydraulic oil tank. When a blowout occurs, the hydraulic oil in the hydraulic oil tank can be injected into the rectangular box 14 (the working principle is the same as that of the hydraulic cylinder). The upper end of the blowout preventer 1 is fixedly connected with a plurality of electric telescopic rods 2, and the telescopic ends of the plurality of electric telescopic rods 2 are commonly fixedly connected with a fixing ring 3, and the lower end of the fixing ring 3 is fixedly connected with an annular sealing ring 4. When in use, the sucker rod is sealed and slidably connected with the annular sealing ring 4.

[0016] L-shaped plates 6 are provided on the left and right sides of the blowout preventer 1, and multiple anchor bolts 7 are provided on the two L-shaped plates 6. Rotating bolts 8 are provided on the two L-shaped plates 6. Threaded holes are provided on the left and right sides of the blowout preventer 1, and each rotating bolt 8 is threadedly connected to the corresponding threaded hole. A circular ring 9 is fixedly connected to the lower end of the blowout preventer 1, and multiple fixing rods 10 are fixedly connected to the lower end of the circular ring 9. A scraper 11 is fixedly connected to each fixing rod 10. The number of scrapers 11 is ten, and the multiple scrapers 11 are all inclined. The multiple scrapers 11 are distributed in a ring array.

[0017] During installation, align the rotating bolts 8 on the two L-shaped plates 6 with the threaded holes, and then rotate multiple rotating bolts 8 to fix the two L-shaped plates 6 to the blowout preventer 1, and then use multiple anchor bolts 7 to insert the two L-shaped plates 6 into the ground, and then use concrete to cast and bury the two L-shaped plates 6, so that the blowout preventer 1 will not fly out during a blowout, and then connect the hydraulic oil tank with the two hydraulic oil pipes 5; then put the sucker rod through the annular sealing ring 4 and the blowout preventer 1 into the wellhead to pump oil. During the process of raising and lowering the sucker rod, if a blowout occurs, the staff can inject the hydraulic oil in the hydraulic oil tank into the rectangular box 14 (the working principle is similar to that of the hydraulic oil cylinder). The two arc blocks 13 drive the two arc rubbers 12 to move relative to each other, tightly wrapping the sucker rod, thereby sealing the wellhead and the blowout preventer 1 to avoid blowout. At the same time, the staff can control the multiple electric telescopic rods 2 to shrink, thereby moving the annular sealing ring 4 downward to seal the upper end of the blowout preventer 1, further avoiding the leakage of crude oil. At the same time, when the sucker rod is pulled out, the multiple scrapers 11 can scrape the crude oil on the sucker rod as much as possible; when the oil well is no longer in use, the staff can remove the multiple rotating bolts 8 to release the fixation of the blowout preventer 1 and the two L-shaped plates 6, and then the blowout preventer 1 can be taken away, so that the blowout preventer 1 can be recycled.

Claims

1. A sucker rod composite blowout preventer, comprising a blowout preventer (1), characterized in that: The inner walls of the left and right sides of the blowout prevention tube (1) are provided with arc grooves, and the inner bottoms of the two arc grooves are provided with rectangular boxes (14). The two rectangular boxes (14) are sealed and slidably connected with rectangular blocks (16). The adjacent sides of the two rectangular blocks (16) are fixedly connected with arc blocks (13), and the adjacent sides of the two arc blocks (13) are fixedly connected with arc rubbers (12). The sides of the two rectangular boxes (14) away from the arc rubbers (12) are connected with hydraulic oil pipes (5), and the sides of the two hydraulic oil pipes (5) away from the rectangular boxes (14) extend to the outside. The upper end of the blowout prevention tube (1) is fixedly connected with a plurality of electric telescopic rods (2), and the telescopic ends of the plurality of electric telescopic rods (2) are fixedly connected with a fixing ring (3), and the lower end of the fixing ring (3) is fixedly connected with an annular sealing ring (4).

2. A sucker rod composite blowout preventer according to claim 1, characterized in that: L-shaped plates (6) are provided on both left and right sides of the blowout preventer (1), a plurality of anchor bolts (7) are provided on both L-shaped plates (6), rotating bolts (8) are provided on both L-shaped plates (6), threaded holes are provided on both left and right sides of the blowout preventer (1), and each rotating bolt (8) is threadedly connected to a corresponding threaded hole.

3. The sucker rod composite blowout preventer according to claim 1, characterized in that: The lower end of the blowout prevention tube (1) is fixedly connected to a circular ring (9), and the lower end of the circular ring (9) is fixedly connected to a plurality of fixed rods (10), and each of the fixed rods (10) is fixedly connected to a scraper (11), and the number of the scrapers (11) is ten, and the plurality of scrapers (11) are all arranged at an angle, and the plurality of scrapers (11) are distributed in a circular array.

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