Stop ring of casing centralizer

Abstract

The utility model relates to the technical field of oil and gas exploration, in particular to a casing centralizer check ring which comprises a semicircular first check plate and a semicircular second check plate, one end of the first check plate is hinged to one end of the second check plate, and a connecting assembly is jointly arranged at the end, away from the hinged end, of the plate face of the first check plate and the end, away from the hinged end, of the second check plate. The connecting assembly comprises a first locking block, a second locking block, a locking rod, a locking cylinder and a locking bead, the first locking block is fixedly connected with the first stop plate, the second locking block is fixedly connected with the second stop plate, the first locking block corresponds to the second locking block in position, the opposite surfaces of the first locking block and the second locking block can be attached, and a locking hole communicating the two surfaces is formed in the surface of the first locking block. A lock groove corresponding to the lock hole is formed in the surface of the second lock block, the lock cylinder is fixedly connected to the side wall of the first lock block, the lock rod penetrates into the lock hole and the lock cylinder in a sliding mode, the lock cylinder can be inserted into the lock groove, the lock bead is movably arranged in the lock cylinder, the lock bead can protrude out of the peripheral wall of the lock cylinder, the lock bead can be clamped in the lock groove, and the effect that the check ring is convenient to mount and dismount is achieved.

Description

Technical Field

[0001] This application relates to the field of oil and gas exploration technology, and in particular to a casing centralizer stop ring. Background Technology

[0002] Currently, the casing centralizer is one of the most commonly used and important devices in the field of oil and gas exploration. Its main function is to ensure that the casing is centered in the wellbore, so as to reduce the possibility of the casing sticking to the well wall during the lowering process, ensure uniform distribution of cement sheath, and improve cementing quality. During use, the casing centralizer may move axially in the casing, interfering with the stability of the casing. Therefore, the casing centralizer stop ring is required. The function of the stop ring is to fix the casing centralizer and prevent the centralizer from moving axially.

[0003] The existing centralizer retaining ring consists of two semi-circular strip plates fitted onto the outer circumferential wall of the sleeve. One end of the two strip plates is hinged to each other, and the other end is connected by bolts and nuts. The strip plates are equipped with set screws. Tightening the set screws fixes the retaining ring, thereby fixing the centralizer onto the sleeve.

[0004] The existing technical solutions mentioned above have the following drawbacks: when installing or removing the retaining ring, two wrenches are required to separate the bolt and nut, which is complicated and inefficient. Utility Model Content

[0005] This application provides a casing centralizer stop ring to facilitate the installation and removal of the stop ring.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0007] A casing straightener stop ring includes a semi-circular first stop plate and a second stop plate. One end of the first stop plate and one end of the second stop plate are hinged to each other, and the first stop plate and the second stop plate can form a complete cylinder. The ends of the first stop plate and the second stop plate away from the hinge end are jointly provided with a connecting component. The connecting component includes a first locking block, a second locking block, a locking rod, a locking cylinder, and a locking ball. The first locking block is fixedly connected to the first stop plate, and the second locking block is fixedly connected to the second stop plate. The first locking block and the second locking block are positioned correspondingly and their opposing surfaces can fit together. The surface of the first locking block has a locking hole that connects the two surfaces, and the surface of the second locking block has a locking groove that corresponds to the locking hole. The locking cylinder is fixedly connected to the side wall of the first locking block. The locking rod slides through the locking hole and the locking cylinder, and the locking cylinder can be inserted into the locking groove. The locking ball is movably disposed in the locking cylinder, and the locking ball can protrude from the peripheral wall of the locking cylinder and can be locked in the locking groove.

[0008] By adopting the above technical solution, and by setting a first stop plate, a second stop plate, and a connecting component, the first stop plate and the second stop plate are hinged at one end and connected at the other end through the connecting component, forming a complete cylinder. In the connecting component, the first locking block and the second locking block are positioned correspondingly and their surfaces are in contact. The lock cylinder can be inserted into the lock groove, and the lock ball can protrude from the peripheral wall of the lock cylinder and be locked in the lock groove, which can realize the opening and closing of the stop ring. During installation, the two stop plates are opened and closed around the hinge and then sleeved on the sleeve, and then quickly connected and fixed by the connecting component. During disassembly, the two stop plates can be separated by operating the connecting component to make the lock ball disengage from the lock groove, thus achieving the effect of convenient installation and disassembly of the stop ring.

[0009] Optionally, an annular groove is formed on the peripheral wall of the locking rod, the groove wall is machined into a flared shape, a locking hole is formed on the peripheral wall of the locking cylinder, and the locking ball is located between the annular groove and the locking hole.

[0010] By adopting the above technical solution, the lock ball is located between the annular groove and the locking hole on the circumferential wall of the lock rod and the locking hole on the circumferential wall of the lock cylinder. When the lock rod slides in the lock hole and the lock cylinder, the flared annular groove wall will squeeze the lock ball, so that the lock ball can protrude from the circumferential wall of the lock cylinder and be stuck in the lock groove, thereby realizing the locking of the connecting components and fixing the connection state of the first stop plate and the second stop plate.

[0011] Optionally, the outer peripheral wall of the lock rod is machined with an annular thickened portion at the end away from the lock cylinder, and a spring is provided in the lock hole. The spring is sleeved on the lock rod, with one end of the spring fixedly connected to the end face of the lock cylinder and the other end fixedly connected to the annular thickened portion.

[0012] By adopting the above technical solution and setting a spring, one end of the spring is fixed to the end face of the lock cylinder and the other end is fixed to the annular thickened part. When the lock rod is pressed, the spring contracts and when the lock rod is released, the spring extends to reset the lock rod. This allows the lock ball to automatically lock into the lock groove under the action of the spring, and the locking of the connecting components can be completed without the aid of tools, further improving the installation efficiency.

[0013] Optionally, both the first stop plate and the second stop plate are provided with arc-shaped fastening plates at their inner arcs. The arc opening of the fastening plate faces the same direction as the arc opening of the first stop plate or the second stop plate. Both the first stop plate and the second stop plate are threaded with fastening bolts. The fastening bolts pass through the first stop plate or the second stop plate, and their ends are located between the fastening plate and the stop plate. The ends of the fastening bolts are rotatably connected to the protruding surface of the fastening plate.

[0014] By adopting the above technical solution, and by setting a fastening plate and a fastening bolt, rotating the fastening bolt can drive the fastening plate to move, so that the concave surface of the fastening plate abuts against the outer peripheral wall of the casing, and fixes the stop ring on the outer peripheral wall of the casing. Compared with the set screw, this can reduce the damage to the outer peripheral wall of the casing.

[0015] Optionally, the fastening plate has a circular rotating hole protruding from the plate surface. The axis of the rotating hole is T-shaped, and the diameter of the rotating hole opening is smaller than the diameter of the hole bottom. The end of the fastening bolt is coaxially fixed to a rotating plate that matches the rotating hole. Both the rotating plate and the end of the fastening bolt are rotatably arranged in the rotating hole.

[0016] By adopting the above technical solution, and by setting a rotating plate, when the fastening bolt is rotated, the rotating plate rotates in the rotating hole, which can drive the fastening plate to move, reducing the possibility of the fastening plate separating from the fastening bolt, and making it convenient to adjust the position of the fastening plate.

[0017] Optionally, guide posts are provided at both ends of the fastening plate protruding from the plate surface. The ends of the guide posts are fixedly connected to the fastening plate. The guide posts slide into the stop plate, and the axis of the guide posts is parallel to the length direction of the fastening bolts.

[0018] By adopting the above technical solution and setting guide posts, the movement trajectory of the fastening plate can be restricted, the possibility of the fastening plate rotating can be reduced, the fastening plate can be made more stable during movement, and the retaining ring can be more accurately fixed on the sleeve in conjunction with the fastening bolts.

[0019] Optionally, the first stop plate has a plurality of first protrusions evenly spaced on the end face away from the connecting component, and the second stop plate has a plurality of second protrusions evenly spaced on the end face away from the connecting component. The first protrusions and the second protrusions are staggered and can be inserted into each other. The first protrusions and the second protrusions are connected by a hinge post. The first stop plate and the second stop plate are hinged to each other through the hinge post.

[0020] By adopting the above technical solution, and by setting the first protrusion, the second protrusion, and the hinge post, the first stop plate and the second stop plate are hinged to each other through the hinge post, which enables the first stop plate and the second stop plate to rotate flexibly and be firmly connected. At the same time, the staggered protrusions increase the contact area at the hinge and improve the overall strength of the stop ring.

[0021] Optionally, the surface of the first protrusion facing away from the first stop plate and the surface of the second protrusion facing away from the second stop plate are both processed into protruding chamfers.

[0022] By adopting the above technical solution, by processing the surface of the first protrusion away from the first stop plate and the surface of the second protrusion away from the second stop plate into protruding chamfers, the friction between the first and second protrusions during rotation can be reduced, the possibility of jamming can be reduced, and the first and second stop plates can rotate more smoothly around the hinge post, making it easier to align and open during installation.

[0023] In summary, this application has the following technical effects:

[0024] 1. By setting a first stop plate, a second stop plate, and a connecting component, the first stop plate and the second stop plate are hinged at one end and connected at the other end through the connecting component to form a complete cylinder. The first locking block and the second locking block in the connecting component are positioned correspondingly and their surfaces are in contact. The lock cylinder can be inserted into the lock groove, and the lock ball can protrude from the peripheral wall of the lock cylinder and be locked in the lock groove, which can realize the opening and closing of the stop ring. During installation, the two stop plates are opened and closed around the hinge and then fitted onto the sleeve, and then quickly connected and fixed by the connecting component. During disassembly, the two stop plates can be separated by operating the connecting component to make the lock ball disengage from the lock groove, thus achieving the effect of convenient installation and disassembly of the stop ring.

[0025] 2. By setting a fastening plate and fastening bolt, rotating the fastening bolt can drive the fastening plate to move, so that the concave surface of the fastening plate abuts against the outer peripheral wall of the casing, fixing the retaining ring on the outer peripheral wall of the casing. Compared with the set screw, this can reduce the damage to the outer peripheral wall of the casing.

[0026] 3. By setting guide posts, the movement trajectory of the fastening plate can be restricted, reducing the possibility of the fastening plate rotating, making the fastening plate more stable during movement, and more accurately fixing the stop ring to the sleeve in conjunction with the fastening bolts. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the object of this application;

[0028] Figure 2 This is a structural diagram of the fastening plate and fastening bolts of this application;

[0029] Figure 3 This is a structural diagram of the connection component in this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Stop assembly; 11. First stop plate; 111. First protrusion; 12. Second stop plate; 121. Second protrusion; 13. Hinge post; 14. Fastening plate; 141. Guide post; 142. Rotating hole; 15. Fastening bolt; 151. Rotating plate; 2. Connecting assembly; 21. First locking block; 211. Lock hole; 22. Second locking block; 221. Lock groove; 23. Lock cylinder; 231. Locking hole; 24. Lock rod; 241. Ring groove; 25. Spring; 26. Lock ball; 27. Handle. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the accompanying drawings.

[0032] This application discloses a casing centralizer stop ring, referring to... Figure 1The stop ring includes a stop component 1 and a connecting component 2. The stop component 1 can be sleeved on the peripheral wall of the casing to prevent the centralizer from moving axially along the outer peripheral wall of the casing. The connecting component 2 can quickly install and fix the stop ring on the outer peripheral wall of the casing, while facilitating disassembly and improving installation and disassembly efficiency.

[0033] Reference Figure 1 The stop assembly 1 includes a semi-circular first stop plate 11 and a second stop plate 12. Both the first stop plate 11 and the second stop plate 12 are metal strip plates with semi-circular sidewalls. The recessed plate surfaces of the first stop plate 11 and the second stop plate 12 are arranged opposite each other. The sidewalls of the first stop plate 11 and the second stop plate 12 are flush with each other. The end faces of the first stop plate 11 and the second stop plate 12 can fit together and form a complete cylinder. One end of the first stop plate 11 and the end of the adjacent second stop plate 12 are hinged together.

[0034] Reference Figure 1 The end faces of the first stop plate 11 and the second stop plate 12, which are hinged to each other, are provided with a plurality of square-shaped first protrusions 111 and second protrusions 121 at even intervals. The first protrusions 111 and the second protrusions 121 are staggered and can be inserted into each other. When the first protrusions 111 and the second protrusions 121 are inserted into each other, they are both provided with the same hinge post 13. The hinge post 13 is a cylinder and passes through the side wall of the first stop plate 11 into the first protrusion 111. The axis of the hinge post 13 is perpendicular to the side wall of the first stop plate 11. The ends of the first stop plate 11 and the second stop plate 12 are hinged to each other through the hinge post 13.

[0035] Reference Figure 1 The surface of the first protrusion 111 facing away from the first stop plate 11 is machined into a protruding chamfer, and the surface of the second protrusion 121 facing away from the second stop plate 12 is machined into a protruding chamfer. The chamfers facilitate the rotation of the first stop plate 11 and the second stop plate 12, reducing the possibility of jamming.

[0036] Combination Figure 1 and Figure 2 Sliding fastening plates 14 are provided in the inner arc of the first stop plate 11 and the inner arc of the second stop plate 12. The fastening plates 14 are curved metal strips. The curved opening of the fastening plate 14 in the inner arc of the first stop plate 11 is aligned with the curved opening of the first stop plate 11. The curved opening of the fastening plate 14 in the inner arc of the first stop plate 11 is aligned with the curved opening of the first stop plate 11. The curved opening of the fastening plate 14 in the inner arc of the second stop plate 12 is aligned with the curved opening of the first stop plate 11.

[0037] Combination Figure 1 and Figure 2Guide posts 141 are provided at both ends of the protruding surface of the fastening plate 14. The guide posts 141 are cylindrical and their ends are fixed to the surface of the fastening plate 14. The guide posts 141 slide through the first stop plate 11 or the second stop plate 12. The axis of the guide posts 141 is perpendicular to the end face of the first stop plate 11. The guide posts 141 can restrict the sliding trajectory of the fastening plate 14 and reduce the possibility of rotation of the sliding plate. The first stop plate 11 and the second stop plate 12 are both threadedly connected with fastening bolts 15. The fastening bolts 15 pass through the first stop plate 11 or the second stop plate 12, and their ends are located between the stop plate and the fastening plate 14. The fastening bolts 15 are located between the guide posts 141 at both ends of the surface of the fastening plate 14, and the length direction of the fastening bolts 15 is parallel to the axis of the guide posts 141.

[0038] Combination Figure 1 and Figure 2 The fastening plate 14 has a circular rotating hole 142 at the corresponding position of the protruding plate surface. The rotating hole 142 is T-shaped in the axial direction. The diameter of the opening of the rotating hole 142 is smaller than the diameter of the bottom of the hole. The end of the fastening bolt 15 is coaxially fixed with a circular rotating plate 151. The rotating plate 151 is adapted to the rotating hole 142. Both the rotating plate 151 and the end of the fastening bolt 15 are rotatably set in the rotating hole 142. The rotating plate 151 can reduce the possibility of the fastening plate 14 and the fastening bolt 15 separating. It is convenient to drive the fastening plate 14 to move along the axial direction of the guide post 141 when the fastening bolt 15 is rotated.

[0039] Combination Figure 1 and Figure 2 When the retaining ring is fitted outside the casing, the fastening plate 14 is moved closer to the casing by rotating the fastening bolt 15. The concave plate surface of the fastening plate 14 abuts against the outer peripheral wall of the casing, fixing the retaining ring on the outer peripheral wall of the casing. Compared with the set screw, the fastening plate 14 can reduce the damage to the outer peripheral wall of the casing.

[0040] Combination Figure 1 and Figure 3 The protruding surfaces of the first stop plate 11 and the second stop plate 12, away from the hinge post 13, are jointly provided with a connecting component 2. The connecting component 2 includes a first locking block 21 and a second locking block 22. The first locking block 21 is located at the end of the surface of the first stop plate 11, and the second locking block 22 is located at the end of the surface of the second stop plate 12. Both the first locking block 21 and the second locking block 22 are metal blocks. The length directions of the first locking block 21 and the second locking block 22 are parallel to the length direction of the end face of the first stop plate 11. The side wall of the first locking block 21 is fixedly connected to the surface of the first stop plate 11, and the side wall of the second locking block 22 is fixedly connected to the surface of the second stop plate 12. The positions of the first locking block 21 and the second locking block 22 correspond, and the opposing surfaces of the first locking block 21 and the second locking block 22 can fit together.

[0041] Combination Figure 1 and Figure 3 The connecting component 2 also includes a lock cylinder 23, a lock rod 24, a spring 25, and a lock ball 26. The surface of the first lock block 21 has a lock hole 211 that connects the two surfaces of the first lock block 21. The lock hole 211 is circular. The lock cylinder 23 is cylindrical. The lock cylinder 23 is fixed to the surface of the first lock block 21 near the second lock block 22. The inner diameter of the lock cylinder 23 is smaller than the diameter of the lock hole 211, and the axis of the lock cylinder 23 coincides with the axis of the lock hole 211. The end of the lock hole 211 away from the second lock block 22 is processed into a conical flared shape.

[0042] Combination Figure 1 and Figure 3 The second locking block 22 has a circular locking groove 221 on its surface near the first locking block 21. The diameter of the bottom of the locking groove 221 is larger than the diameter of the opening. The outer wall of the locking cylinder 23 is adapted to the opening of the locking groove 221 and can be inserted into the locking groove 221. The locking rod 24 is slidably disposed in the lock hole 211 and the locking cylinder 23. The peripheral wall end of the locking rod 24 away from the locking cylinder 23 is coaxially machined to form an annular thickened part. The annular thickened part can be located in the flared end of the lock hole 211. The annular thickened part is flush with the surface of the first locking block 21, away from the surface of the second locking block 22. The spring 25 is disposed in the lock hole 211 and is sleeved on the peripheral wall of the locking rod 24. One end of the spring 25 is fixedly connected to the end face of the locking cylinder 23, and the other end is fixedly connected to the end face of the locking cylinder 23.

[0043] Combination Figure 1 and Figure 3 Locking holes 231 are provided on opposite sides of the peripheral wall of the lock cylinder 23, connecting the inside and outside of the lock cylinder 23. The locking holes 231 are conical. The diameter of the opening of the locking hole 231 on the outer wall of the lock cylinder 23 is smaller than the diameter of the opening on the inner wall. The diameters of the two ends of the locking rod 24 are different. The diameter of the end face of the locking rod 24 located in the lock cylinder 23 is smaller than the diameter of the locking rod 24 located in the locking hole 211. An annular groove 241 is provided on the peripheral wall of the section of the locking rod 24 located inside the lock cylinder 23. The groove walls on both sides of the annular groove 241 are flared. The locking ball 26 is movably disposed in the locking hole 231 and the annular groove 241. The locking ball 26 can protrude from the outer wall of the lock cylinder 23.

[0044] Combination Figure 1 and Figure 3 When the first stop plate 11 and the second stop plate 12 are connected, pressing the locking rod 24 causes the spring 25 to contract, allowing the locking ball 26 to be fully positioned inside the lock cylinder 23. The lock cylinder 23 is then inserted into the lock groove 221. Releasing the locking rod 24 causes the spring 25 to extend, resetting the locking rod 24. The flared annular groove 241 then presses against the locking ball 26, causing its surface to protrude from the outer wall of the lock cylinder 23 and engage in the lock groove 221. The connecting assembly 2 allows for quick installation of the stop ring outside the sleeve, improving installation efficiency.

[0045] Combination Figure 1 and Figure 3A handle 27 is fixedly connected to the side wall of the first locking block 21 away from the first stop plate 11. The handle 27 is U-shaped, and both ends of the handle 27 are fixedly connected to the side wall of the first locking block 21. The U-shaped opening of the handle 27 faces the first locking block 21. The handle 27 makes the stop ring easy to carry and facilitates the operation of the connecting component 2, which is beneficial for the installation and disassembly of the stop ring.

[0046] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A casing centralizer stop ring, characterized in that: It includes a semi-circular first stop plate (11) and a second stop plate (12), one end of the first stop plate (11) and one end of the second stop plate (12) are hinged to each other, the first stop plate (11) and the second stop plate (12) can form a complete cylinder, and the ends of the first stop plate (11) and the second stop plate (12) away from the hinge end are provided with a connecting component (2); The connecting assembly (2) includes a first locking block (21), a second locking block (22), a locking rod (24), a locking cylinder (23), and a locking ball (26). The first locking block (21) is fixedly connected to the first stop plate (11), and the second locking block (22) is fixedly connected to the second stop plate (12). The first locking block (21) and the second locking block (22) are positioned correspondingly and their surfaces can fit together. The surface of the first locking block (21) is provided with a locking hole (211) connecting the two surfaces. The second locking block (24) is fixedly connected to the first stop plate (11), and the second locking block (25) is fixedly connected to the second stop plate (12). 2) A lock groove (221) corresponding to the lock hole (211) is provided on the surface. The lock cylinder (23) is fixed to the side wall of the first lock block (21). The lock rod (24) slides through the lock hole (211) and the lock cylinder (23). The lock cylinder (23) can be inserted into the lock groove (221). The lock ball (26) is movably disposed in the lock cylinder (23). The lock ball (26) can protrude from the peripheral wall of the lock cylinder (23) and can be locked in the lock groove (221).

2. The casing centralizer stop ring according to claim 1, characterized in that: The locking rod (24) has an annular groove (241) on its peripheral wall, and the groove wall of the annular groove (241) is machined into an flared shape. The locking cylinder (23) has a locking hole (231) on its peripheral wall, and the locking ball (26) is located between the annular groove (241) and the locking hole (231).

3. The casing centralizer stop ring according to claim 2, characterized in that: The outer peripheral wall of the locking rod (24) away from the locking cylinder (23) is machined to form an annular thickened part. A spring (25) is provided in the lock hole (211). The spring (25) is sleeved on the locking rod (24). One end of the spring (25) is fixed to the end face of the locking cylinder (23), and the other end is fixed to the annular thickened part.

4. The casing centralizer stop ring according to claim 1, characterized in that: Both the first stop plate (11) and the second stop plate (12) are provided with arc-shaped fastening plates (14) at their inner arcs. The arc opening of the fastening plate (14) is aligned with the arc opening of the first stop plate (11) or the second stop plate (12). Both the first stop plate (11) and the second stop plate (12) are threaded with fastening bolts (15). The fastening bolts (15) are inserted into the first stop plate (11) or the second stop plate (12), and their ends are located between the fastening plate (14) and the stop plate. The ends of the fastening bolts (15) are rotatably connected to the protruding surface of the fastening plate (14).

5. A casing centralizer stop ring according to claim 4, characterized in that: The fastening plate (14) has a circular rotating hole (142) protruding from the plate surface. The rotating hole (142) is T-shaped along its axis. The diameter of the opening of the rotating hole (142) is smaller than the diameter of the bottom of the hole. The end of the fastening bolt (15) is coaxially fixed with a rotating plate (151) that is adapted to the rotating hole (142). The rotating plate (151) and the end of the fastening bolt (15) are both rotatably arranged in the rotating hole (142).

6. A casing centralizer stop ring according to claim 5, characterized in that: The fastening plate (14) has guide posts (141) at both ends of the protruding plate surface. The ends of the guide posts (141) are fixed to the fastening plate (14). The guide posts (141) slide into the stop plate. The axis of the guide posts (141) is parallel to the length direction of the fastening bolts (15).

7. The casing centralizer stop ring according to claim 1, characterized in that: The first stop plate (11) has a plurality of first protrusions (111) evenly spaced on its end face away from the connecting component (2), and the second stop plate (12) has a plurality of second protrusions (121) evenly spaced on its end face away from the connecting component (2). The first protrusions (111) and the second protrusions (121) are staggered and can be inserted into each other. The first protrusions (111) and the second protrusions (121) are connected by a hinge post (13). The first stop plate (11) and the second stop plate (12) are hinged to each other by the hinge post (13).

8. A casing centralizer stop ring according to claim 7, characterized in that: The surface of the first protrusion (111) facing away from the first stop plate (11) and the surface of the second protrusion (121) facing away from the second stop plate (12) are both processed into protruding chamfers.

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