Bolt type check ring for oil casing

Abstract

The utility model provides a pin type check ring for a petroleum casing, which belongs to the technical field of petroleum casings and comprises a first semi-ring, a second semi-ring is arranged on the side of the first semi-ring, two ends of the first semi-ring are fixedly connected with first bent plates, two ends of the second semi-ring are fixedly connected with second bent plates, and the first bent plates and the second bent plates are arranged on the first semi-ring and the second semi-ring respectively. A first perforated plate is arranged on the side portion of the first bent plate, a second perforated plate is arranged on the side portion of the second bent plate, and bolts are inserted into holes of the first perforated plate and the second perforated plate. According to the sleeve check ring, the insertion shafts are arranged, the insertion shafts are arranged on the two sides of the first half ring and the two sides of the second half ring correspondingly, the sleeve check ring has the remarkable advantage in the aspect of reducing the indentation risk, the check ring makes large-area contact with the inner wall of a sleeve through the deformed spiral reinforcing ribs, and clamping force is evenly distributed on the sleeve.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum casing, specifically is a latch type stop ring for petroleum casing. BACKGROUND

[0002] The petroleum casing stop ring is a key component in drilling operation, and the main function is to fix the centralizer to prevent it from moving due to stress during drilling. Through close cooperation with the centralizer, the stop ring ensures the stability and perpendicularity of the drill pipe, thereby ensuring the safety and efficient operation of the entire drilling system. In complex formation conditions or when the direction of the drill pipe needs to be adjusted, the stop ring can effectively limit the displacement of the centralizer, avoiding drilling accidents caused by centralizer failure.

[0003] The commonly used top screw stop ring has a certain indentation risk during installation and use. Since the top screw stop ring is directly locked by threads, the contact area is relatively small. When a large torque is applied, and the casing wall thickness is thin, indentation or stress concentration areas may be formed on the surface of the casing. These indentations not only affect the structural integrity of the casing, but also may cause sealing failure or leakage problems during subsequent cementing operations, thereby affecting the normal production and safe operation of oil and gas wells. SUMMARY

[0004] To make up for the above shortcomings, the utility model provides a latch type stop ring for petroleum casing to overcome the above technical problems or at least partially solve the above problems.

[0005] The utility model is implemented as follows:

[0006] The utility model provides a latch type stop ring for petroleum casing, which comprises a first half ring, a second half ring is arranged on the side of the first half ring, first curved plates are fixedly connected to both ends of the first half ring, second curved plates are fixedly connected to both ends of the second half ring, a first perforated plate is arranged on the side of the first curved plate, a second perforated plate is arranged on the side of the second curved plate, and a latch is inserted into the perforations of the first perforated plate and the second perforated plate.

[0007] By arranging the insertion shaft, the two sides of the first half ring and the second half ring are provided with insertion shafts, which has a significant advantage in reducing indentation risk. The stop ring makes large-area contact with the inner wall of the casing through the deformed spiral reinforcing ribs, and the clamping force is evenly distributed on the casing. This design not only improves the stability and reliability of the stop ring, but also effectively reduces the stress problems caused by excessive local stress, to a certain extent, ensuring the integrity of the casing and reducing the risk of casing problems.

[0008] In one embodiment of the utility model, a limiting piece is fixedly arranged at one end of the latch.

[0009] In an embodiment of the utility model, the first perforated plate and the second perforated plate are arranged at intervals.

[0010] In an embodiment of the utility model, the annular body of the first half ring and the second half ring is provided with a through groove.

[0011] In an embodiment of the utility model, the annular body of the first half ring and the second half ring is fixedly provided with a curved half ring beside the through groove.

[0012] In an embodiment of the utility model, the recessed side of the curved half ring is fixedly connected with a reinforcing rib in the through groove.

[0013] By arranging the reinforcing rib on the annular body of the first half ring and the second half ring of the utility model, the reinforcing rib can improve the shape stability of the stop ring under complex stress environment. The oil casing may be affected by uneven formation pressure, thermal stress and other factors in the well, which will generate complex stress on the stop ring. The reinforcing rib can effectively disperse these stresses, ensure the stability of the annular structure of the stop ring during long-term use, maintain its normal stop and force transmission function, and the shaft is not easy to loosen, which can be used in a shock-resistant environment.

[0014] The utility model provides a kind of latch type stop ring for oil casing, and its beneficial effects include:

[0015] 1, by arranging the shaft, the two sides of the first half ring and the second half ring are provided with shaft, so that the utility model has significant advantages in reducing indentation risk, the stop ring is in large-area contact with the inner wall of casing through the deformed helical reinforcing rib, and the clamping force is evenly distributed on the casing. This design not only improves the stability and reliability of the stop ring, but also effectively reduces the stress problem caused by excessive local stress, to some extent, ensures the integrity of the casing and reduces the risk of casing problems.

[0016] 2, by arranging the reinforcing rib, the reinforcing rib is arranged on the annular body of the first half ring and the second half ring of the utility model, which can improve the shape stability of the stop ring under complex stress environment. The oil casing may be affected by uneven formation pressure, thermal stress and other factors in the well, which will generate complex stress on the stop ring. The reinforcing rib can effectively disperse these stresses, ensure the stability of the annular structure of the stop ring during long-term use, maintain its normal stop and force transmission function, and the latch is not easy to loosen, which can be used in a shock-resistant environment. DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 is a structural schematic diagram provided by the embodiments of the present application;

[0019] Figure 2 is a front view provided by the embodiments of the present application;

[0020] Figure 3 is a side view provided by the embodiments of the present application;

[0021] Figure 4 is a connection schematic diagram provided by the embodiments of the present application.

[0022] In the figure: 1, first half ring; 2, second half ring; 3, first curved plate; 4, second curved plate; 5, first perforated plate; 6, second perforated plate; 7, bolt; 701, limiting piece; 8, through slot; 9, curved half ring; 10, reinforcing rib. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0024] EMBODIMENT

[0025] WITH REFERENCE Figures 1-4The technical scheme provides a latch type stop ring for a petroleum casing, wherein the stop ring comprises a first half ring 1, a second half ring 2 is arranged on the side of the first half ring 1, first curved plates 3 are fixedly connected to the two ends of the first half ring 1, second curved plates 4 are fixedly connected to the two ends of the second half ring 2, a first perforated plate 5 is arranged on the side of the first curved plate 3, a second perforated plate 6 is arranged on the side of the second curved plate 4, latches 7 are inserted into the perforations of the first perforated plate 5 and the second perforated plate 6, in use, the latch 7 on one side is taken out, then the first half ring 1 and the second half ring 2 are opened from the side, and after being installed on the petroleum casing, the latch 7 is inserted into the perforation of the first perforated plate 5 and the second perforated plate 6 on the side, at this time, the reinforcing rib 10 in the through groove 8 can provide an additional limiting ring effect for the petroleum casing, the two sides of the first half ring 1 and the second half ring 2 are provided with the latches 7, the two sides of the first half ring 1 and the second half ring 2 are provided with the latches, so that the petroleum casing stop ring has a significant advantage in reducing the risk of indentation, the stop ring is in large-area contact with the inner wall of the casing through the deformed spiral reinforcing rib 10, and the clamping force is uniformly distributed on the casing, the design manner not only improves the stability and reliability of the stop ring, but also effectively reduces the stress problem caused by excessive local stress, to a certain extent, ensures the integrity of the casing and reduces the risk of problems of the casing.

[0026] With reference to Figures 1-4 Based on the same concept as in the above embodiment 1, one end of the latch 7 is fixedly provided with a limiting piece 701.

[0027] With reference to Figures 1-4 Based on the same concept as in the above embodiment 1, the first perforated plate 5 and the second perforated plate 6 are arranged at intervals, the two sides of the first half ring 1 and the second half ring 2 are provided with the latches 7, and the reinforcing rib 10 is arranged on the ring body of the first half ring 1 and the second half ring 2 of the petroleum casing stop ring, the reinforcing rib 10 can improve the shape stability of the stop ring in a complex stress environment, the petroleum casing may be affected by uneven formation pressure, thermal stress and other factors in the well, and complex stress is generated on the stop ring, the reinforcing rib 10 can effectively disperse the stress, ensure that the ring structure of the stop ring remains stable in the long-term use process, maintain the normal stop and force transmission functions, the latch 7 is not easy to loosen, and can be used in a shock-resistant environment.

[0028] With reference to Figures 1-4 Based on the same concept as in the above embodiment 1, the ring body of the first half ring 1 and the second half ring 2 is provided with the through groove 8.

[0029] With reference to Figures 1-4, based on the same idea as in the above embodiment 1, this embodiment also proposes that the curved half ring 9 is fixed on the ring body of the first half ring 1 and the second half ring 2, and the reinforcing rib 10 is located in the through groove 8, which can provide an additional limiting ring effect for the oil casing.

[0030] Referring to Figures 1-4 , based on the same idea as in the above embodiment 1, this embodiment also proposes that the curved half ring 9 is fixed on the ring body of the first half ring 1 and the second half ring 2, and the reinforcing rib 10 is located in the through groove 8, which can provide an additional limiting ring effect for the oil casing.

[0031] Specifically, the working process or working principle of the pin type stop ring for oil casing is as follows: in use, first install the pin 7 on one side and insert it into the opening of the first opening plate 5 and the second opening plate 6, then open the first half ring 1 and the second half ring 2 from this side, and then insert the other pin 7 into the opening of the first opening plate 5 and the second opening plate 6, and then insert the chamfer direction of the spiral rib 10 into the through groove 8 of the stop ring, and then use a hammer or a hammer to hit the reinforcing rib 10, and then hit the reinforcing rib 10 on the other side, at this time, the reinforcing rib 10 in the through groove 8 can provide an additional limiting ring effect for the oil casing, and the stop ring can be deformed by the spiral reinforcing rib 10 and the inner wall of the casing, and the clamping force can be uniformly distributed on the casing, and finally the tail of the cylindrical pin 7 is folded 180° by using a wrench.

[0032] It should be noted that the reinforcing rib 10 is a device or equipment existing in the prior art, or a device or equipment that can be realized in the prior art, and its specific composition and principle are clear to those skilled in the art, so it will not be described in detail.

Claims

1. A pin retainer ring for oil casing comprising a first half ring (1), characterized in that, The side of the first half ring (1) is provided with a second half ring (2), both ends of the first half ring (1) are fixedly connected with first curved plates (3), both ends of the second half ring (2) are fixedly connected with second curved plates (4), the side of the first curved plate (3) is provided with a first perforated plate (5), the side of the second curved plate (4) is provided with a second perforated plate (6), the perforations of the first perforated plate (5) and the second perforated plate (6) are inserted with a bolt (7).

2. A pin retainer ring for use with a petroleum casing as defined in claim 1, wherein One end of the bolt (7) is fixedly provided with a limiting sheet (701).

3. A pin retainer ring for use with a petroleum casing as defined in claim 2, wherein The first perforated plate (5) and the second perforated plate (6) are arranged at intervals.

4. A pin retainer ring for use with a petroleum casing as defined in claim 3, wherein The ring body of the first half ring (1) and the second half ring (2) is provided with a through groove (8).

5. A pin retainer ring for use with a petroleum casing as defined in claim 4, wherein The ring body of the first half ring (1) and the second half ring (2) is fixedly provided with a curved half ring (9) beside the through groove (8).

6. A pin retainer ring for use with a petroleum casing as defined in claim 5, wherein The concave side of the curved half ring (9) is fixedly connected with a reinforcing rib (10) in the through groove (8).

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