Mechanical double-positioning-block casing coupling positioner

Abstract

The utility model discloses a mechanical casing coupling positioner with double positioning blocks, which relates to the technical field of casing fittings and comprises a coupling pipe body, a coupling inner ring is fixedly connected to the middle inside the coupling pipe body, and a double positioning block component capable of reducing pre-bending and stress expansion and contraction is arranged inside the coupling inner ring. According to the mechanical double-positioning-block casing coupling positioner, the first internal thread, the coupling inner ring, the second internal thread, the upper positioning blocks, the upper flow guide slope, the lower positioning blocks and the lower flow guide slope are arranged, and when the mechanical double-positioning-block casing coupling positioner is used, the four sets of upper positioning blocks and the four sets of lower positioning blocks synchronously extend into a casing and are meshed with threads on the inner wall of the casing, so that the positioning effect is improved; the four sets of upper positioning blocks and the four sets of lower positioning blocks form support in the casing pipe, the pre-bending probability of the casing pipe is reduced, meanwhile, traction fixation is formed through threads, the internal strength is improved, the coupling is prevented from stretching out and drawing back under stress, the internal positioning and supporting functions are achieved, and the problem that the device does not have the internal positioning and supporting functions is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of casing accessories, in particular to a mechanical double-positioning block casing coupling positioner. Background Art

[0002] Casing is a steel pipe that supports the wellbore of oil and gas wells. Each well uses several layers of casing according to the different drilling depths and geological conditions. The casings are connected by casing couplings.

[0003] Currently, most common casing couplings on the market are similar in structure, with steel as the main material, internal threads, and connected to the casing through threads. There are some functional deficiencies in actual use and there is room for improvement. For example, conventional oil casing couplings are connected to the casing through threads on the inner wall. During the process of continuous oil tubing entering the well, they are affected by the force of the casing and are prone to pre-bending and force expansion and contraction problems, which directly affects the high-precision positioning of the target layer and does not have the function of internal positioning support.

[0004] Now, a novel mechanical double-positioning block casing coupling locator is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a mechanical double-positioning block casing coupling positioner to solve the problem of lack of internal positioning support function proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mechanical double positioning block casing coupling locator, comprising a coupling pipe body, a coupling inner ring is fixedly connected to the middle position inside the coupling pipe body, and a double positioning block assembly is arranged inside the coupling inner ring to reduce pre-bending and stress expansion and contraction phenomena.

[0007] The double positioning block assembly includes four groups of upper positioning blocks, which are respectively fixedly connected to the left and right sides and the front and rear ends of the top of the inner wall of the inner ring of the coupling, the top of the upper positioning block is provided with an upper guide slope, the left and right sides and the front and rear ends of the bottom of the inner wall of the inner ring of the coupling are respectively fixedly connected with lower positioning blocks, the bottom end of the lower positioning block is provided with a lower guide slope, the bottom end of the coupling pipe body is provided with a first internal thread, and the top of the coupling pipe body is provided with a second internal thread.

[0008] Preferably, the upper positioning block and the lower positioning block have the same shape and size, and the bottom end of the upper positioning block is connected to the top end of the lower positioning block.

[0009] Preferably, the outer parts of the upper positioning block and the lower positioning block are respectively threaded, and the upper positioning block and the lower positioning block are symmetrically distributed with respect to the vertical center line of the coupling pipe body.

[0010] Preferably, the top end of the upper positioning block is lower than the top end of the coupling pipe body, and the bottom end of the lower positioning block is higher than the bottom end of the coupling pipe body.

[0011] Preferably, the upper and lower ends of the inner ring of the coupling are respectively glued with Y-shaped sealing rings, the end of the Y-shaped sealing ring far from the inner ring of the coupling is provided with a Y-shaped groove, the interior of the Y-shaped groove is glued with an inelastic plastic film tube, and the interior of the inelastic plastic film tube is filled with adhesive.

[0012] Preferably, the Y-shaped sealing ring is elastic, and the top end of the inelastic plastic film tube is higher than the top end of the Y-shaped sealing ring.

[0013] Preferably, the upper and lower ends of the coupling pipe body are respectively fixedly connected with fixed half rings, the left and right sides of the fixed half ring are respectively fixedly connected with first fixed blocks, the interior of the first fixed block is provided with bolt through holes, a movable half ring is provided in front of the fixed half ring, the left and right sides of the movable half ring are respectively fixedly connected with second fixed blocks, the rear end of the second fixed block is fixedly connected with connecting bolts, the outer side of the connecting bolts is sleeved with anti-dropping nuts, and sealing rings are respectively glued to the interiors of the fixed half ring and the movable half ring.

[0014] Preferably, the connecting bolt passes through the interior of the bolt through hole and extends to the outside, and the thread inside the anti-dropping nut matches the thread outside the connecting bolt.

[0015] Compared with the prior art, the utility model has the beneficial effects that: the mechanical double positioning block casing coupling positioner not only realizes the function of internal positioning support, but also realizes the function of internal enhanced sealing, and also realizes the function of external traction and fixing;

[0016] (1) By providing a first internal thread, a coupling inner ring, a second internal thread, an upper positioning block, an upper guide slope, a lower positioning block and a lower guide slope, when in use, two sets of casings are respectively inserted from the top and bottom of the coupling pipe body, the first internal thread, the second internal thread and the thread outside the casing are engaged, and the coupling pipe body and the casing are connected. During installation, four sets of upper positioning blocks and four sets of lower positioning blocks are synchronously extended into the casing and engaged with the threads of the inner wall of the casing. The four sets of upper positioning blocks and four sets of lower positioning blocks form support inside the casing to reduce the probability of pre-bending thereof. At the same time, the threads form a pulling fixation to increase the internal strength and prevent the coupling from being stretched and contracted under stress. The upper guide slope and the lower guide slope can reduce the obstruction to the fluid medium and enable it to pass quickly, thereby realizing the function of internal positioning support;

[0017] (2) By providing a coupling inner ring, a Y-shaped sealing ring, a Y-shaped groove, an inelastic plastic film tube and an adhesive, when in use, as the casing and the coupling body are tightened, the end of the casing squeezes the Y-shaped sealing ring on the inner ring of the coupling, the Y-shaped groove on the Y-shaped sealing ring opens, and at the same time the inelastic plastic film tube is squeezed and broken, and the adhesive inside overflows, bonding the Y-shaped sealing ring and the end of the casing, thereby preventing the medium from overflowing from the connection position under high pressure, and realizing the function of internal enhanced sealing;

[0018] (3) A fixed half ring, a sealing ring, a first fixed block, a bolt through hole, a movable half ring, a second fixed block, a connecting bolt and an anti-slip nut are provided. When in use, as the casing and the coupling body are tightened, the connecting bolts on the second fixed blocks on both sides of the movable half ring are inserted along the bolt through holes in the first fixed blocks on both sides of the fixed half ring, and the anti-slip nuts are put on the outside of the connecting bolts and tightened. The fixed half ring and the movable half ring hold the casing to increase the firmness of the connection. At the same time, the sealing ring is close to the outer wall of the casing, which increases the friction force and can also seal the interface position, thereby realizing the function of external traction and fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the top view of the coupling pipe body of the utility model;

[0021] Figure 3 For the utility model Figure 1 A partial cross-section at the center is an enlarged structural diagram;

[0022] Figure 4 It is a schematic diagram of the movable semi-ring structure from a top view of the present utility model.

[0023] In the figure: 1. Coupling pipe body; 2. First internal thread; 3. Coupling inner ring; 4. Second internal thread; 5. Upper positioning block; 6. Upper guide slope; 7. Lower positioning block; 8. Lower guide slope; 9. Y-shaped sealing ring; 10. Y-shaped groove; 11. Inelastic plastic film tube; 12. Adhesive; 13. Fixed half ring; 14. Sealing ring; 15. First fixed block; 16. Bolt through hole; 17. Movable half ring; 18. Second fixed block; 19. Connecting bolt; 20. Anti-slip nut. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1: Please refer to Figure 1-4 A mechanical double-positioning block casing coupling positioner comprises a coupling body 1, a coupling inner ring 3 is fixedly connected at the middle position inside the coupling body 1, and a double-positioning block assembly is arranged inside the coupling inner ring 3 to reduce pre-bending and stress expansion and contraction phenomena;

[0026] See also Figure 1-4 A mechanical double-positioning block casing coupling positioner also includes a double-positioning block assembly, which includes four groups of upper positioning blocks 5, which are respectively fixedly connected to the left and right sides and front and rear ends of the top of the inner wall of the coupling inner ring 3, and the top of the upper positioning block 5 is provided with an upper guide slope 6, and the left and right sides and front and rear ends of the bottom of the inner wall of the coupling inner ring 3 are respectively fixedly connected with lower positioning blocks 7, and the bottom end of the lower positioning block 7 is provided with a lower guide slope 8, and the bottom end of the coupling pipe body 1 is provided with a first internal thread 2, and the top of the coupling pipe body 1 is provided with a second internal thread 4;

[0027] The upper positioning block 5 and the lower positioning block 7 have the same shape and size. The bottom end of the upper positioning block 5 is connected to the top end of the lower positioning block 7. The outer parts of the upper positioning block 5 and the lower positioning block 7 are respectively threaded. The upper positioning block 5 and the lower positioning block 7 are symmetrically distributed about the vertical center line of the coupling pipe body 1. The top end of the upper positioning block 5 is lower than the top end of the coupling pipe body 1, and the bottom end of the lower positioning block 7 is higher than the bottom end of the coupling pipe body 1. By adding upper and lower double positioning blocks, the structural strength of the coupling is increased.

[0028] Specifically, Figure 1 and Figure 2 As shown, the first internal thread 2, the second internal thread 4 and the thread on the outside of the casing are engaged, and the coupling body 1 and the casing are connected. During installation, the four groups of upper positioning blocks 5 and the four groups of lower positioning blocks 7 are synchronously extended into the casing and engaged with the threads on the inner wall of the casing. The four groups of upper positioning blocks 5 and the four groups of lower positioning blocks 7 form a support inside the casing to reduce the probability of pre-bending. At the same time, the threads are used to form a pulling fixation to increase the internal strength and prevent the coupling from being stretched or contracted under stress. The upper guide slope 6 and the lower guide slope 8 can reduce the obstruction to the fluid medium and allow it to pass quickly.

[0029] Embodiment 2: The upper and lower ends of the inner ring 3 of the coupling are respectively glued with a Y-shaped sealing ring 9, and the end of the Y-shaped sealing ring 9 far from the inner ring 3 of the coupling is provided with a Y-shaped groove 10, and the inside of the Y-shaped groove 10 is glued with an inelastic plastic film tube 11, and the inside of the inelastic plastic film tube 11 is filled with adhesive 12. The Y-shaped sealing ring 9 has elasticity, and the top of the inelastic plastic film tube 11 is higher than the top of the Y-shaped sealing ring 9, so as to enhance the sealing performance of the connection surface;

[0030] Specifically, Figure 1 and Figure 3 As shown, the end of the sleeve squeezes the Y-shaped sealing ring 9 on the inner ring 3 of the coupling, and the Y-shaped groove 10 on the Y-shaped sealing ring 9 opens. At the same time, the inelastic plastic film tube 11 is squeezed and broken, and the internal adhesive 12 overflows to bond the Y-shaped sealing ring 9 and the end of the sleeve to prevent the medium from overflowing from the connection position under high pressure.

[0031] Embodiment 3: The upper and lower ends of the coupling pipe body 1 are respectively fixedly connected with a fixed half ring 13, and the left and right sides of the fixed half ring 13 are respectively fixedly connected with a first fixed block 15, and a bolt through hole 16 is arranged inside the first fixed block 15. A movable half ring 17 is arranged in front of the fixed half ring 13, and the left and right sides of the movable half ring 17 are respectively fixedly connected with a second fixed block 18, and the rear end of the second fixed block 18 is fixedly connected with a connecting bolt 19, and the outer part of the connecting bolt 19 is sleeved with an anti-drop nut 20, and the inner parts of the fixed half ring 13 and the movable half ring 17 are respectively glued with a sealing ring 14, and the connecting bolt 19 passes through the inner part of the bolt through hole 16 and extends to the outside, and the inner thread of the anti-drop nut 20 is consistent with the outer thread of the connecting bolt 19, so as to further enhance the firmness of the connection;

[0032] Specifically, Figure 1 and Figure 4 As shown, the connecting bolts 19 on the second fixed blocks 18 on both sides of the movable half ring 17 are inserted along the bolt through holes 16 in the first fixed blocks 15 on both sides of the fixed half ring 13, and the anti-slip nuts 20 are put on the outside of the connecting bolts 19 and tightened. The fixed half ring 13 and the movable half ring 17 hold the sleeve to increase the firmness of the connection. At the same time, the sealing ring 14 is close to the outer wall of the sleeve, which increases the friction and can also seal the interface position.

[0033] Working principle: When the utility model is in use, first, two groups of casings are respectively inserted from the top and bottom of the coupling pipe body 1, and the first internal thread 2, the second internal thread 4 and the thread outside the casing are engaged, and the coupling pipe body 1 and the casing are connected. During installation, four groups of upper positioning blocks 5 and four groups of lower positioning blocks 7 are synchronously extended into the casing and engaged with the threads on the inner wall of the casing. The four groups of upper positioning blocks 5 and the four groups of lower positioning blocks 7 form a support inside the casing to reduce the probability of pre-bending. At the same time, a pulling fixation is formed through the threads to increase the internal strength and prevent the coupling from being stretched and contracted under force. The upper guide slope 6 and the lower guide slope 8 can reduce the obstruction to the fluid medium and allow it to pass quickly. As the sleeve and the coupling body 1 are tightened, the end of the sleeve squeezes the Y-shaped sealing ring 9 on the inner ring 3 of the coupling, the Y-shaped groove 10 on the Y-shaped sealing ring 9 opens, and at the same time, the inelastic plastic film tube 11 is squeezed and broken, and the internal adhesive 12 overflows, bonding the Y-shaped sealing ring 9 and the end of the sleeve to prevent the medium from overflowing from the connection position under high pressure. As the sleeve and the coupling body 1 are tightened, the connecting bolts 19 on the second fixing blocks 18 on both sides of the movable semi-ring 17 are inserted along the bolt through holes 16 in the first fixing blocks 15 on both sides of the fixed semi-ring 13, and the anti-slip nuts 20 are put on the outside of the connecting bolts 19 and tightened, and the fixed semi-ring 13 and the movable semi-ring 17 hold the sleeve to increase the firmness of the connection. At the same time, the sealing ring 14 is close to the outer wall of the sleeve, which increases the friction and can also seal the interface position.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A mechanical double-positioning block casing coupling positioner, comprising a coupling body (1), characterized in that: A coupling inner ring (3) is fixedly connected to the middle position inside the coupling pipe body (1), and a double positioning block assembly is arranged inside the coupling inner ring (3) to reduce pre-bending and stress expansion and contraction phenomena; The double positioning block assembly comprises four groups of upper positioning blocks (5), the four groups of upper positioning blocks (5) are respectively fixedly connected to the left and right sides and the front and rear ends of the top of the inner wall of the coupling inner ring (3), the top of the upper positioning block (5) is provided with an upper guide slope (6), the left and right sides and the front and rear ends of the bottom of the inner wall of the coupling inner ring (3) are respectively fixedly connected with lower positioning blocks (7), the bottom end of the lower positioning block (7) is provided with a lower guide slope (8), the bottom end of the coupling pipe body (1) is provided with a first internal thread (2), and the top end of the coupling pipe body (1) is provided with a second internal thread (4).

2. A mechanical double positioning block casing coupling positioner according to claim 1, characterized in that: The upper positioning block (5) and the lower positioning block (7) have the same shape and size, and the bottom end of the upper positioning block (5) and the top end of the lower positioning block (7) are connected.

3. The mechanical double positioning block casing coupling positioner according to claim 1, characterized in that: The outer parts of the upper positioning block (5) and the lower positioning block (7) are respectively threaded, and the upper positioning block (5) and the lower positioning block (7) are symmetrically distributed with respect to the vertical center line of the coupling pipe body (1).

4. The mechanical double-positioning block casing coupling positioner according to claim 1, characterized in that: The top end of the upper positioning block (5) is lower than the top end of the coupling pipe body (1), and the bottom end of the lower positioning block (7) is higher than the bottom end of the coupling pipe body (1).

5. The mechanical double-positioning block casing coupling positioner according to claim 1, characterized in that: The upper and lower ends of the inner ring (3) of the coupling are respectively glued with a Y-shaped sealing ring (9), and the end of the Y-shaped sealing ring (9) far from the inner ring (3) of the coupling is provided with a Y-shaped groove (10), and the interior of the Y-shaped groove (10) is glued with an inelastic plastic film tube (11), and the interior of the inelastic plastic film tube (11) is filled with adhesive (12).

6. A mechanical double positioning block casing coupling positioner according to claim 5, characterized in that: The Y-shaped sealing ring (9) has elasticity, and the top end of the inelastic plastic film tube (11) is higher than the top end of the Y-shaped sealing ring (9).

7. The mechanical double-positioning block casing coupling positioner according to claim 1, characterized in that: The upper and lower ends of the coupling pipe body (1) are respectively fixedly connected with a fixed half ring (13), the left and right sides of the fixed half ring (13) are respectively fixedly connected with a first fixed block (15), a bolt through hole (16) is provided inside the first fixed block (15), a movable half ring (17) is provided in front of the fixed half ring (13), the left and right sides of the movable half ring (17) are respectively fixedly connected with a second fixed block (18), the rear end of the second fixed block (18) is fixedly connected with a connecting bolt (19), the outside of the connecting bolt (19) is sleeved with an anti-drop nut (20), and the inside of the fixed half ring (13) and the movable half ring (17) are respectively glued with a sealing ring (14).

8. The mechanical double-positioning block casing coupling positioner according to claim 7, characterized in that: The connecting bolt (19) penetrates the interior of the bolt through hole (16) and extends to the exterior, and the threads inside the anti-dropping nut (20) match the threads outside the connecting bolt (19).

Images