Adjustable grading hoop for well cementation

Abstract

The utility model relates to the technical field of well cementation, and discloses an adjustable grading hoop for well cementation, which comprises a connecting hoop body, an upper end casing pipe and a lower end casing pipe, the top and the bottom of the connecting hoop body are both provided with sealing grooves, and the two sides of the upper part and the lower part of the connecting hoop body are both fixedly connected with first locking blocks; first locking grooves are formed in the adjacent sides of the two first locking blocks correspondingly, first locking rings are fixedly connected to the outer sides of the two first locking blocks correspondingly, sealing rings are fixedly connected to the bottom of the upper-end sleeve and the top of the lower-end sleeve correspondingly, and second locking blocks are fixedly connected to the two sides of the upper-end sleeve and the two sides of the lower-end sleeve correspondingly. According to the connecting hoop, the second locking ring is inserted into the first locking groove, the first locking ring is inserted into the second locking groove, the effect of connecting the hoop body with the upper end sleeve and the lower end sleeve can be achieved, and the sealing effect of the connecting position of the hoop body can be improved by being matched with the sealing ring and the sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of cementing technology, specifically to an adjustable graded clamp for cementing. Background Technology

[0002] Cementing is a crucial operation in the drilling process. Drilling operations typically involve at least two cementing operations, and sometimes four to five. The uppermost cementing is the surface casing cementing, which acts as a "mud passage and oil / gas gateway." Before the next drilling operation, a blowout preventer (BOP) is installed on the surface casing to prevent blowouts. Above the BOP, a mud guide is installed, which is the passage for drilling fluid to return to the mud pit. During cementing, the casing sections need to be connected and lowered into the well one by one. Because of the depth of the drilling, a single casing section is not long enough, so multiple casing sections need to be connected before mud is injected into the well. A stage collar is used between the multiple casing sections. The stage collar has openings on both sides for mud to pass through. During cementing and grouting, different types of mud are injected depending on the local terrain, and the number of openings on the stage collar needs to be adjusted accordingly.

[0003] The existing graded clamps are mostly directly connected to the upper and lower sleeves via threaded connections. This connection method results in poor sealing between the sleeve and the clamp body, and the connection is not very stable.

[0004] To address the aforementioned issues, an adjustable graded clamp for cementing is proposed. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable graded clamp for cementing, which solves the problems of poor sealing effect and weak connection stability between the casing and the connecting clamp in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable graded hoop for cementing, comprising a connecting hoop body, an upper casing, and a lower casing. The connecting hoop body has sealing grooves at its top and bottom. First locking blocks are fixedly connected to both the upper and lower sides of the connecting hoop body. First locking grooves are formed on adjacent sides of the two first locking blocks. First locking rings are fixedly connected to the outer sides of the two first locking blocks. Sealing rings are fixedly connected to the bottom of the upper casing and the top of the lower casing. Second locking blocks are fixedly connected to both sides of the upper and lower casings. Second locking grooves are formed on adjacent sides of the two second locking blocks. Second locking rings are fixedly connected to the outer sides of the second locking blocks. An inner sleeve is rotatably connected inside the connecting hoop body. An adjusting component is provided inside the inner sleeve. Multiple alignment ports are provided through the outer side of the inner sleeve.

[0007] By adopting the above technical solution, the second locking ring is inserted into the first locking groove, and the first locking ring is inserted into the second locking groove, so that the connecting hoop and the upper and lower sleeves can be connected. With the help of the sealing ring and sealing ring, the sealing at the connection of the hoop can be improved.

[0008] As a further description of the above technical solution: the adjustment component includes a rotating ring, which is fixedly connected to the inner wall of the inner sleeve. The top of the rotating ring has four slots, and an adjustment cone is provided inside the rotating ring. A conveying seat is fixedly connected to the top of the adjustment cone, and four locking blocks are fixedly connected to the outside of the conveying seat.

[0009] By adopting the above technical solution, the transmission seat in the adjustment component is used to control the adjustment cone, so that the operator can connect to the drive device through the transmission seat, and the drive device can drive the adjustment cone to rotate through the transmission seat, thereby driving the rotating ring that is engaged with the adjustment cone to move, so that the inner sleeve can rotate inside the connecting hoop, which is in response to the misalignment between the alignment port and the water inlet.

[0010] As a further description of the above technical solution: the first locking ring is fixedly connected to the connecting hoop, and the first locking ring is disposed in the second locking groove.

[0011] By adopting the above technical solution, the locking ring and the locking groove are fitted with an interference fit. That is, the size of the locking ring is slightly larger than the corresponding size of the locking groove. When the locking ring is inserted into the locking groove, a certain amount of external force is required to make it fit. This interference fit generates a large contact pressure between the locking ring and the locking groove, thereby forming a strong frictional force and effectively preventing the locking ring from slipping out.

[0012] As a further description of the above technical solution: the sealing ring is disposed in the sealing groove, and a sealing ring is fixedly connected to the bottom of the sealing ring.

[0013] By adopting the above technical solution, the sealing effect at the connection between the connecting clamp and the sleeve can be improved through the sealing ring and sealing ring.

[0014] As a further description of the above technical solution: the second locking ring is fixedly connected to the outside of the upper sleeve and the lower sleeve, and the second locking ring is disposed in the first locking groove.

[0015] By adopting the above technical solution, when the upper sleeve and the lower sleeve rotate, the second locking ring can be driven to insert into the first locking groove.

[0016] As a further description of the above technical solution: the outer side of the connecting hoop is provided with multiple water inlets, and the water inlets correspond to the alignment ports.

[0017] By adopting the above technical solution, it is convenient for mud to pass through the alignment port and the conveying port to enter the outside of the connecting hoop.

[0018] As a further description of the above technical solution: the transmission seat is located below the alignment port.

[0019] By adopting the above technical solution, the mud can be easily discharged from the alignment port above the conveyor seat.

[0020] As a further description of the above technical solution: the card block corresponds to the card slot, and the card block is disposed in the card slot.

[0021] By adopting the above technical solution, the adjusting cone can easily drive the rotating ring and inner sleeve to rotate through the locking block and the locking groove.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This utility model provides an adjustable graded clamp for cementing. By inserting a second locking ring into a first locking groove and a first locking ring into a second locking groove, it can achieve the effect of connecting the clamp body to the upper and lower casings. With the help of sealing rings and sealing rings, it can improve the sealing effect at the connection of the clamp body, making it more practical. Furthermore, the angle of the inner sleeve in the connecting clamp body can be adjusted as needed, thereby causing misalignment between the alignment port and the water inlet, which facilitates the adjustment of the fluid flow rate as needed. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is an exploded view of the upper sleeve of this utility model;

[0026] Figure 3 This is a cross-sectional view of the connecting hoop of this utility model.

[0027] In the diagram: 1. Connecting hoop; 2. Sealing groove; 3. First locking block; 4. First locking groove; 5. First locking ring; 6. Upper sleeve; 7. Sealing ring; 8. Second locking block; 9. Second locking groove; 10. Second locking ring; 11. Inner sleeve; 12. Rotating ring; 13. Slot; 14. Adjusting cone; 15. Locking block; 16. Alignment port; 17. Water inlet; 18. Transmitter seat; 19. Sealing ring; 20. Lower sleeve. Detailed Implementation

[0028] 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.

[0029] To further understand the contents of this utility model, a detailed description of this utility model will be provided with reference to the accompanying drawings.

[0030] Reference Figure 1-3 This utility model discloses an adjustable graded clamp for cementing, comprising a connecting clamp body 1, an upper casing 6, and a lower casing 20. The connecting clamp body 1 has sealing grooves 2 at both its top and bottom, which provide positioning. First locking blocks 3 are fixedly connected to both the upper and lower sides of the connecting clamp body 1. Each of the two adjacent first locking blocks 3 has a first locking groove 4. First locking rings 5 ​​are fixedly connected to the outer sides of each of the two first locking blocks 3, with the front end of the first locking ring 5 being narrower and the rear end wider. Sealing rings 7 are fixedly connected to the bottom of the upper casing 6 and the top of the lower casing 20, serving both sealing and positioning functions. The upper sleeve 6 and the lower sleeve 20 are both fixedly connected to the second locking blocks 8 on both sides. The two second locking blocks 8 are each provided with a second locking groove 9 on an adjacent side. The outer side of the second locking blocks 8 is fixedly connected to the second locking ring 10. The inner sleeve 11 is rotatably connected inside the connecting hoop 1. The inner sleeve 11 is provided with an adjusting component, which can drive the inner sleeve 11 to rotate. The outer side of the inner sleeve 11 has multiple alignment ports 16 that pass through it to facilitate the discharge of mud.

[0031] Reference Figure 3 The adjusting assembly includes a rotating ring 12, which is fixedly connected to the inner wall of the inner sleeve 11. Four slots 13 are provided on the top of the rotating ring 12. An adjusting cone 14 is disposed inside the rotating ring 12, and a conveying seat 18 is fixedly connected to the top of the adjusting cone 14. A driving device is connected to the top of the conveying seat 18 to facilitate the rotation of the adjusting cone 14. Four locking blocks 15 are fixedly connected to the outside of the conveying seat 18. The conveying seat 18 is located below the alignment port 16, and the locking blocks 15 correspond to the slots 13 and are disposed within the slots 13. The adjusting assembly allows the inner sleeve 11 to rotate inside the connecting hoop 1, which, combined with the misalignment between the alignment port 16 and the water inlet 17, facilitates the adjustment of the mud flow rate.

[0032] Reference Figure 1-3The first locking ring 5 is fixedly connected to the connecting hoop 1, and is located in the second locking groove 9. The first locking ring 5 can slide into the second locking groove 9, and the two interlock with each other, fitting tightly like a mortise and tenon structure to ensure the stability of the connection. The sealing ring 7 is located in the sealing groove 2, and a sealing ring 19 is fixedly connected to the bottom of the sealing ring 7. The sealing ring 7 and the sealing ring 19 can improve the sealing effect at the connection between the connecting hoop 1 and the sleeve. The second locking ring 10 is fixedly connected to the outside of the upper sleeve 6 and the lower sleeve 20, and is located in the first locking groove 4. Multiple water inlets 17 are provided through the outside of the connecting hoop 1, and the water inlets 17 correspond to the alignment ports 16, so that mud can pass through the alignment ports 16 and the water inlets 17 to enter the outside of the connecting hoop 1.

[0033] Working principle: When installing the connecting clamp 1 with the upper sleeve 6 and the lower sleeve 20, align the sealing rings 7 at the bottom of the upper sleeve 6 and the top of the lower sleeve 20 and insert them into the sealing grooves 2 at the top and bottom of the connecting clamp 1. Then, rotate the upper sleeve 6 and the lower sleeve 20, causing the second locking rings 10 and the second locking blocks 8 on both sides of the upper sleeve 6 and the lower sleeve 20 to rotate. At this time, the second locking ring 10 is inserted into the first locking groove 4, and the first locking ring 5 is inserted into the second locking groove 4. Within groove 9, the upper casing 6, lower casing 20, and connecting collar 1 are ultimately connected. Combined with sealing ring 7 and sealing ring 19, the sealing effect at the collar connection is improved, enhancing practicality. After the collar is installed, when workers begin staged grouting, the connected connecting collar 1 and casing are placed into the wellbore. At this point, workers can inject mud into the upper casing 6. The mud entering the upper casing 6 will pass through the connecting collar 1 and inner sleeve 11 into the lower casing. Inside the end casing 20, after the mud reaches the bottom of the lower end casing 20, it moves towards the outside of the casing, so that the mud reaches between the lower end casing 20 and the wellbore. At this time, the mud will move upward along the lower end casing 20 until the mud moves to the outside of the connecting collar 1. At this time, the workers can wait for the mud to solidify and complete the initial grouting work. After the initial mud is solidified, the workers can put the adjusting cone 14 into the inside of the inner sleeve 11. When the adjusting cone 14 moves inside the inner sleeve 11 until it contacts the inner wall of the rotating ring 12 and the locking block 15 slides into the locking groove 13, the workers can rotate the adjusting cone 14 to make the adjusting cone 14 drive the rotating ring 12 and the inner sleeve 11 to rotate. When the inner sleeve 11 rotates, it will rotate inside the connecting collar 1, so that the alignment port 16 opened on the outside of the inner sleeve 11 will be aligned with the water inlet 17. And through the misalignment between the alignment port 16 and the water inlet 17, it is convenient to adjust the flow rate of the fluid as needed. After adjustment, the workers can inject mud into the upper sleeve 6 again. Due to the blocking of the adjusting cone 14, the mud will be led out to the outside of the connecting hoop 1 through the alignment port 16 and the water inlet 17 after contacting the adjusting cone 14 and the conveying seat 18. The mud will move upward along the connecting hoop 1 and the outside of the upper sleeve 6, thereby completing the grouting work of the upper sleeve 6 and completing the staged grouting work.

[0034] 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.

[0035] 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. An adjustable graded clamp for cementing, comprising a connecting clamp body (1), an upper casing (6), and a lower casing (20), characterized in that: The connecting hoop (1) has sealing grooves (2) at the top and bottom. The connecting hoop (1) has first locking blocks (3) fixedly connected to the top and bottom sides. The two first locking blocks (3) have first locking grooves (4) on adjacent sides. The two first locking blocks (3) have first locking rings (5) fixedly connected to the outside of the two first locking blocks (3). The bottom of the upper sleeve (6) and the top of the lower sleeve (20) are fixedly connected to sealing rings (7). The upper sleeve (6) and the lower sleeve (20) have second locking blocks (8) fixedly connected to both sides. The two second locking blocks (8) have second locking grooves (9) on adjacent sides. The second locking blocks (8) have second locking rings (10) fixedly connected to the outside of the second locking blocks (8). The connecting hoop (1) has an inner sleeve (11) rotatably connected inside. The inner sleeve (11) has an adjustment component inside. The outer side of the inner sleeve (11) has multiple alignment ports (16) through it.

2. The adjustable graded clamp for cementing according to claim 1, characterized in that: The adjustment assembly includes a rotating ring (12), which is fixedly connected to the inner wall of the inner sleeve (11). The top of the rotating ring (12) has four slots (13). An adjustment cone (14) is provided inside the rotating ring (12). A conveyor seat (18) is fixedly connected to the top of the adjustment cone (14). Four locking blocks (15) are fixedly connected to the outside of the conveyor seat (18).

3. The adjustable graded clamp for cementing according to claim 1, characterized in that: The first locking ring (5) is fixedly connected to the connecting hoop (1), and the first locking ring (5) is located in the second locking groove (9).

4. An adjustable graded clamp for cementing according to claim 1, characterized in that: The sealing ring (7) is set in the sealing groove (2), and a sealing ring (19) is fixedly connected to the bottom of the sealing ring (7).

5. An adjustable graded clamp for cementing according to claim 1, characterized in that: The second locking ring (10) is fixedly connected to the outside of the upper sleeve (6) and the lower sleeve (20), and the second locking ring (10) is located in the first locking groove (4).

6. An adjustable graded clamp for cementing according to claim 1, characterized in that: The connecting hoop (1) has multiple water inlets (17) extending through its outer side, and the water inlets (17) correspond to the aligning inlets (16).

7. An adjustable graded clamp for cementing according to claim 2, characterized in that: The transfer seat (18) is located below the alignment port (16).

8. An adjustable graded clamp for cementing according to claim 2, characterized in that: The card block (15) corresponds to the card slot (13), and the card block (15) is set in the card slot (13).

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