Grading hoop with internal closing structure

Abstract

The utility model belongs to the technical field of grading hoops, and discloses a grading hoop with an internal closing structure, which comprises a round pipe, threads are fixedly arranged in the round pipe, a square groove is formed in the round pipe, a hydraulic telescopic rod II is fixedly arranged in the round pipe, a fixed triangular block is fixedly arranged on the right side of the hydraulic telescopic rod II, and a hydraulic telescopic rod II is fixedly arranged on the right side of the fixed triangular block. According to the cement injection hole closing device, through the arrangement of the second hydraulic telescopic rod, when a cement injection hole needs to be closed, the closing plug slides on the fixed triangular blocks, due to the fact that the closing plug is provided with the groove, when the closing plug moves downwards, the fixed triangular blocks above the closing plug are clamped in the groove, and the cement injection hole is closed. If the grading hoop needs to be moved, a fixed triangular block is stored in a square groove, a closing plug is moved and a cement injection hole is opened through stretching and retracting of a second hydraulic telescopic rod, internal closing of the grading hoop is achieved through the design, and the grading hoop is more convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of graded hoop technology, specifically a graded hoop with an internal closing structure. Background Technology

[0002] Currently, most shallow layers in oilfields have been explored and developed. To obtain more oil and gas reserves and production, exploration and production can only be carried out using medium-deep, deep, and ultra-deep wells. In medium-deep, deep, and ultra-deep wells, due to the large gaps between oil and gas layers and the corrosion of casing by gas and formation water, a whole-well cementing process is required. In the past, whole-well cementing usually adopted the conventional one-time cementing process. This process often resulted in leakage, ranging from insufficient cement return to quality accidents such as unsealed upper oil layers. Using low-density high-strength cement for one-time cementing can meet the cementing requirements of some wells. However, because low-density high-strength cement has low bonding strength, it is easily crushed and channeled during later fracturing operations. At the same time, low-density high-strength cement is also very expensive. Therefore, the one-time cementing process can no longer meet the cementing requirements. Consequently, most oilfield companies' development plans require the use of a staged cementing process for oil and gas wells with a vertical depth exceeding 2500 meters. The staged cementing process requires the use of staged clamps. The classifier collar is placed at the classifier position on the casing. After the previous stage of cementing is completed, a small drilling tool is used to drill a pouring hole on the classifier collar, and the next stage of cementing is completed through the pouring hole.

[0003] Meanwhile, a graded clamp with announcement number CN103775025B is disclosed. It is roughly cylindrical in shape, consisting of a body, a first sliding sleeve, a first plug seat, and a first sealing plug. The side wall of the body is provided with a circulation port and a first groove. The first plug seat can drive the first sliding sleeve to slide axially relative to the body under the action of the first sealing plug to open the circulation port. The first sliding sleeve and the first plug seat are connected by a first locking pin. The first locking pin is constructed and arranged such that, during the process of the first sliding sleeve sliding axially relative to the body, the first locking pin slides at least partially into the first groove, thereby releasing the connection between the first sliding sleeve and the first plug seat.

[0004] The aforementioned graded hoop requires manual closure of the cement injection hole after cement injection, making the work cumbersome, increasing workload, and wasting time and effort. In addition, the lack of a fixing structure during installation makes the graded hoop prone to loosening.

[0005] Therefore, a graded hoop with an internal closing structure is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a graded hoop with an internal closing structure, which has the advantages of achieving internal closure of the graded hoop, making it more convenient to use, and fixing it during use without it moving.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a graded hoop with an internal closing structure, comprising a round tube, the inside of which is fixedly provided with a thread, the inside of which is provided with a square groove, the inside of which is fixedly provided with a hydraulic telescopic rod II, the right side of which is fixedly provided with a fixed triangular block, the inside of which is provided with a closing plug, and the groove of the closing plug is fitted to the fixed triangular block.

[0008] Preferably, a cement injection hole is provided on the outside of the circular tube, a differential pressure opening slide sleeve is fixedly provided below the closing plug, a closing slide sleeve is fixedly provided inside the differential pressure opening slide sleeve, and a sealing ring is fixedly provided on the outside of the closing slide sleeve, and the sealing ring is fixedly set with the differential pressure opening slide sleeve.

[0009] By adopting the above technical solution, cement is introduced into the cement injection hole during use, and the opening and closing of the cement injection hole is controlled by the differential pressure opening and closing sliding sleeve to carry out cement replacement and other tasks.

[0010] Preferably, an electric slide rail is fixedly provided on the outer side of the circular tube, a slider is slidably provided inside the electric slide rail, a connecting rod is fixedly provided on the outer side of the slider, a rotating shaft is fixedly provided at the top of the connecting rod, a fixing block is fixedly provided on the outer side of the rotating shaft, and an anti-slip strip is fixedly provided on the outer side of the fixing block.

[0011] By adopting the above technical solution, the slider 1 slides in the electric slide rail 1, causing the slider 1 to slide along the limit rod, which causes the spring to contract and the connecting rod 1 to slide.

[0012] Preferably, an electric slide rail two is fixedly provided below the electric slide rail one, a slider two is slidably provided inside the electric slide rail two, a connecting rod two is fixedly provided outside the slider two, and a rotating shaft is provided at the top of the connecting rod two.

[0013] By adopting the above technical solution, the second slider slides in the second electric slide rail, causing the second slider to slide along the limit rod, which causes the spring to contract, causing the first connecting rod to slide, and then the first connecting rod and the second connecting rod to rotate together with the rotating shaft. The position of the fixing block is adjusted as needed, and then anti-slip strips are used for anti-slip, so that it is fixed during use and will not move.

[0014] Preferably, a limiting rod is fixedly provided inside the electric slide rail, and the limiting rod passes through the slider. A spring is provided outside the limiting rod. A circular ring is fixedly provided below the outside of the circular tube. A hydraulic telescopic rod is fixedly provided outside the circular ring. A fixing ring is fixedly provided at the top of the hydraulic telescopic rod.

[0015] By adopting the above technical solution, a circular ring is set up, and the position of the fixed ring is adjusted by the extension and retraction of the hydraulic telescopic rod to expand it. The position is then adjusted according to the position of the fixed block for further fixation.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model, by setting a hydraulic telescopic rod two, allows the closing plug to slide on the fixed triangular block when the cement injection hole needs to be closed. Because the closing plug has a groove, when it moves downward, the upper fixed triangular block is stuck in the groove, fixing it in one position. If it needs to be moved, the fixed triangular block is retracted into the square groove by the extension and retraction of the hydraulic telescopic rod two, and the closing plug moves upward, opening the cement injection hole. This design realizes the internal closure of the graded hoop, making it more convenient to use.

[0018] 2. In this utility model, the second slider slides in the second electric slide rail, causing the second slider to slide along the limit rod, which causes the spring to contract, causing the first connecting rod to slide, and then the first connecting rod and the second connecting rod to rotate together with the rotating shaft. The position of the fixing block is adjusted as needed, and anti-slip strips are used for anti-slip, so that it is fixed during use and will not move. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the graded hoop of this utility model;

[0020] Figure 2 This is a schematic diagram of the closing plug structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the fixed triangular block structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the sealing ring structure of this utility model.

[0023] In the diagram: 1. Round tube; 2. Electric slide rail one; 3. Electric slide rail two; 4. Slider one; 5. Slider two; 6. Connecting rod one; 7. Connecting rod two; 8. Rotating shaft; 9. Fixing block; 10. Anti-slip strip; 11. Limiting rod; 12. Spring; 13. Ring; 14. Hydraulic telescopic rod one; 15. Fixing ring; 16. Closing plug; 17. Differential pressure opening slide sleeve; 18. Closing slide sleeve; 19. Sealing ring; 20. Thread; 21. Cement injection hole; 22. Fixing triangular block; 23. Hydraulic telescopic rod two; 24. Square groove. Detailed Implementation

[0024] 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.

[0025] The following describes an embodiment of this utility model based on its overall structure.

[0026] like Figures 1 to 4 As shown, this utility model provides a graded clamp with an internal closing structure, including a round tube 1. The round tube 1 has a thread 20 fixed inside and a square groove 24 inside. A hydraulic telescopic rod 23 is fixed inside the round tube 1. A fixed triangular block 22 is fixed on the right side of the hydraulic telescopic rod 23. A closing plug 16 is provided inside the round tube 1, and the groove of the closing plug 16 is fitted to the fixed triangular block 22. When the cement injection hole 21 is to be closed, the closing plug 16 slides on the fixed triangular block 22. Because the closing plug 16 has a groove, when it moves downward, the upper fixed triangular block 22 is stuck in the groove, fixing it in one position. To move it, the fixed triangular block 22 is retracted into the square groove 24 by the extension and retraction of the hydraulic telescopic rod 23, and the closing plug 16 moves upward, opening the cement injection hole 21.

[0027] In this embodiment, a cement injection hole 21 is further provided on the outside of the circular tube 1. A differential pressure opening sliding sleeve 17 is fixedly provided below the closing plug 16. A closing sliding sleeve 18 is fixedly provided inside the differential pressure opening sliding sleeve 17. A sealing ring 19 is fixedly provided on the outside of the closing sliding sleeve 18, and the sealing ring 19 is fixedly set with the differential pressure opening sliding sleeve 17. In use, cement is introduced through the cement injection hole 21. The opening and closing of the cement injection hole 21 is controlled by the differential pressure opening sliding sleeve 17 and the closing sliding sleeve 18 to perform cement replacement and other operations. An electric slide rail 2 is fixedly installed on the outer side of the electric slide rail 2. A slider 4 is slidably installed inside the electric slide rail 2. A connecting rod 6 is fixedly installed on the outside of the slider 4. A rotating shaft 8 is fixedly installed at the top of the connecting rod 6. A fixing block 9 is fixedly installed on the outside of the rotating shaft 8. An anti-slip strip 10 is fixedly installed on the outside of the fixing block 9. The slider 4 slides in the electric slide rail 2, causing the slider 4 to slide along the limiting rod 11, which causes the spring 12 to contract and the connecting rod 6 to slide. An electric slide rail 3 is fixedly installed below the electric slide rail 2. The sliding slide rail 23 has a sliding block 2 5 inside, and a connecting rod 2 7 is fixedly installed on the outside of the sliding block 2 5. The top of the connecting rod 2 7 is rotatably mounted on a rotating shaft 8. The sliding block 2 5 slides in the electric slide rail 23, causing the sliding block 2 5 to slide along the limiting rod 11, causing the spring 12 to contract, causing the connecting rod 1 6 to slide, and then the connecting rod 1 6 and the connecting rod 2 7 to rotate together with the rotating shaft 8. The position of the fixing block 9 is adjusted as needed, and the anti-slip strip 10 is used for anti-slip, so that it is fixed in use and will not move. The electric slide rail 2 has a limiting rod 11 fixed inside, and the limiting rod 11 passes through the sliding block 1 4. The limiting rod 11 has a spring 12 outside. The lower part of the outer side of the round tube 1 is fixedly mounted on the outer side of the round tube 1. The outer side of the round tube 1 is fixedly mounted on the hydraulic telescopic rod 14. The top of the hydraulic telescopic rod 14 is fixedly mounted on a fixing ring 15. The round tube 13 is set up so that the position of the fixing ring 15 can be adjusted by the extension and retraction of the hydraulic telescopic rod 14, so that it expands and is adjusted according to the position of the fixing block 9 for further fixation.

[0028] The working principle and process of a graded hoop with an internal closing structure:

[0029] In use, a graded hoop with an internal closing structure works by sliding slider 4 in electric slide rail 2, causing slider 4 to slide along limit rod 11, which in turn contracts spring 12 and causes connecting rod 6 to slide. Similarly, slider 5 slides in electric slide rail 3, causing slider 5 to slide along limit rod 11, which in turn contracts spring 12 and causes connecting rod 6 to slide. This causes connecting rods 6 and 7 to rotate together with shaft 8. The position of fixing block 9 is adjusted as needed, and anti-slip strip 10 is used for anti-slip, ensuring the hoop is fixed in place during use. The position of fixing ring 15 is adjusted by extending and retracting hydraulic telescopic rod 14, allowing it to expand. Adjust the position of the fixing block 9 for further fixing. After fixing, cement is introduced into the cement injection hole 21. When the cement injection hole 21 is to be closed, the closing plug 16 slides on the fixing triangular block 22. Because the closing plug 16 has a groove, when it moves downward, the upper fixing triangular block 22 is stuck in the groove, fixing it in one position. If it is to be moved, the fixing triangular block 22 is retracted into the square groove 24 by the extension and retraction of the hydraulic telescopic rod 23. The closing plug 16 moves upward, opening the cement injection hole 21. At the same time, the differential pressure opening sleeve 17 and the closing sleeve 18 control the opening and closing of the cement injection hole 21 to perform cement replacement and other work.

[0030] 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 process, method, article, or apparatus.

[0031] 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 stepped collar with internal closing structure, comprising a circular tube (1), characterized in that: The inside of the round tube (1) is fixedly provided with a thread (20), the inside of the round tube (1) is provided with a square groove (24), the inside of the round tube (1) is fixedly provided with a hydraulic telescopic rod (23), the right side of the hydraulic telescopic rod (23) is fixedly provided with a fixed triangular block (22), the inside of the round tube (1) is provided with a closing plug (16), and the groove of the closing plug (16) is fitted to the fixed triangular block (22).

2. A graduated cuff with internal closure according to claim 1, characterized in that: The outer side of the round tube (1) is provided with a cement injection hole (21), and a differential pressure opening slide sleeve (17) is fixedly provided below the closing plug (16). A closing slide sleeve (18) is fixedly provided inside the differential pressure opening slide sleeve (17), and a sealing ring (19) is fixedly provided on the outer side of the closing slide sleeve (18). The sealing ring (19) and the differential pressure opening slide sleeve (17) are fixedly set together.

3. The graduated ferrule with internal closure according to claim 1, characterized in that: An electric slide rail (2) is fixedly provided on the outside of the round tube (1). A slider (4) is slidably provided inside the electric slide rail (2). A connecting rod (6) is fixedly provided on the outside of the slider (4). A rotating shaft (8) is fixedly provided at the top of the connecting rod (6). A fixing block (9) is fixedly provided on the outside of the rotating shaft (8). An anti-slip strip (10) is fixedly provided on the outside of the fixing block (9).

4. A graduated collar with internal closing according to claim 3, characterized in that: Electric slide rail 2 (3) is fixedly provided below the electric slide rail 1 (2). Sliding slider 2 (5) is slidably provided inside the electric slide rail 2 (3). Connecting rod 2 (7) is fixedly provided on the outside of the sliding slider 2 (5). Rotating shaft (8) is provided at the top of the connecting rod 2 (7).

5. The graduated ferrule with internal shut down according to claim 3, characterized in that: The electric slide rail (2) is fixedly provided with a limiting rod (11), and the limiting rod (11) passes through the slider (4). The limiting rod (11) is provided with a spring (12) on its outside.

6. The graduated ferrule with internal closure according to claim 1, characterized in that: A circular ring (13) is fixedly provided on the lower outer side of the circular tube (1), and a hydraulic telescopic rod (14) is fixedly provided on the outer side of the circular ring (13), and a fixing ring (15) is fixedly provided on the top end of the hydraulic telescopic rod (14).

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