Bidirectional clamping sleeve pipe clamping device capable of detecting sealing
By introducing expansion ring, clamp and extrusion ring structures into the clamping casing device, the problem of invaluable sealing of the clamping joint and clamping casing is solved, and reliable detection and stability of sealing performance is achieved, and production costs are reduced.
Patent Information
- Application Number
- CN202422656660.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-31
AI Technical Summary
The sealing performance between existing sleeve fittings and sleeves cannot be verified separately, with unknown sealing risks, resulting in leak points that can lead to repeated operation and increased production costs.
A two-way locking casing device that can detect and seal is designed. By testing the expansion ring, squeezing and extrusion ring structures in the joint, the sealing performance is detected and stable with the pressing parts to ensure the sealing performance and the clamping force of the casing.
Reliable inspection of sealing performance is achieved, preventing leakage during seal verification, improving operating efficiency and reducing production costs.
Smart Images
Figure CN223177487U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of downhole operation tools for oil and gas fields, and particularly relates to a device for bidirectionally clamping and fixing a sleeve pipe with seal detection. Background Art
[0002] When developing oil and gas wells, the ferrule joint is a widely used connection method. The ferrule joint can not only hold the sleeve pipe tightly, but also seal the sleeve pipe. However, during the use process, the sealing performance of the sleeve pipe cannot be verified separately. In this way, there is a great unknown danger in the seal between the ferrule joint and the sleeve pipe, and the sealing between the ferrule joint and the sleeve pipe cannot be guaranteed. If there is a leakage point, it is necessary to remove the tool and reassemble it, which increases the workload of the operator and raises the production cost. Content of the Utility Model
[0003] Aiming at the above defects or deficiencies, the purpose of the utility model is to provide a device for bidirectionally clamping and fixing a sleeve pipe with seal detection.
[0004] To achieve the above purpose, the technical solution of the utility model is as follows:
[0005] A device for bidirectionally clamping and fixing a sleeve pipe with seal detection, comprising: a test joint, an inner sealing hole is provided in the test joint, and a test hole communicating with the inner sealing hole is provided on one side of the test joint; an expansion ring, a ferrule, and an extrusion ring are sequentially installed in the inner sealing hole, the inner sealing hole is installed on the sleeve pipe through a pressing member, the sleeve pipe passes through the pressing member, the expansion ring, the ferrule, and the extrusion ring, and is positioned in the inner sealing hole of the test joint; the other end of the test joint is connected with a double male joint; a sealing plug is installed in the test hole.
[0006] The ferrule includes a first ferrule and a second ferrule arranged at both ends of the extrusion ring, and the expansion ring contacts the first ferrule.
[0007] The first ferrule includes: a first front ferrule and a first rear ferrule, and the second ferrule includes: a second rear ferrule and a second front ferrule.
[0008] The inner conical surface at the end of the expansion ring is engaged with the outer conical surface at the left end of the first front ferrule, and the inner hole at the right end of the first front ferrule contacts the chamfer at the left end face of the first rear ferrule.
[0009] The inner inclined surface at the right end of the extrusion ring is engaged with the outer inclined surface at the left end of the second rear ferrule, the outer inclined surface at the right end of the second rear ferrule contacts the inner inclined surface at the left end of the second front ferrule, and the outer conical surface at the right end of the second front ferrule is engaged with the inner conical surface in the test joint.
[0010] The pressing member is a pressing nut, and the second step surface on the periphery of the pressing nut is engaged with the end face of the expansion ring.
[0011] The outer circle of the expansion ring and the inner sealing hole are in clearance fit.
[0012] The test hole is sealed by a plug with a sealing thread.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0014] The present utility model provides a device for detecting the seal of a two-way clamping and fixing ferrule. The unique design and assembly structure of the pressing member and the expansion ring cooperate with the inner hole of the test joint, making its sealing performance more stable and reliable, and preventing verification failure caused by the seal of the expansion ring during the test verification process; in addition, due to the unique design of the extrusion ring, the test joint can assemble two sets of ferrule joints. This unique design not only facilitates and ensures the seal test of the ferrule, but also enhances the clamping force of the ferrule. Description of the Drawings
[0015] Figure 1 is a schematic structural diagram of the device for detecting the seal of a two-way clamping and fixing ferrule of the present utility model;
[0016] Figure 2 is Figure 1 the schematic structural diagram of the test joint in
[0017] In the figure, 1 - pressing member, 2 - test joint, 3 - extrusion ring, 4 - double male joint, 5 - expansion ring, 6 - front ferrule, 7 - rear ferrule, 8 - ferrule tube, 9 - rear ferrule, 10 - front ferrule, 11 - sealing plug
[0018] 201 - test hole, 202 - inner sealing hole. Detailed Embodiments
[0019] The following will describe the present utility model in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.
[0020] Such as Figure 1 、 2As shown in the figure, the utility model provides a device for detecting and sealing a two-way clamped ferrule, which includes: a test joint 2, an inner sealing hole 202 is opened in the test joint 2, and a test hole 201 communicating with the inner sealing hole 202 is opened on one side of the test joint 2; an expansion ring 5, a ferrule, and an extrusion ring 3 are sequentially installed in the inner sealing hole 202, the inner sealing hole 202 is installed on the ferrule 8 through a pressing member 1, and the ferrule 8 passes through the pressing member 1, the expansion ring 5, the ferrule, and the extrusion ring 3 and is positioned in the inner sealing hole 202 of the test joint 2; a double male joint 4 is connected to the other end of the test joint 2.
[0021] Specifically, the ferrule includes a first ferrule and a second ferrule arranged at both ends of the extrusion ring 3, and the expansion ring 5 contacts the first ferrule; for example, the first ferrule includes: a first front ferrule 6 and a first rear ferrule 7, and the second ferrule includes: a second rear ferrule 9 and a second front ferrule 10.
[0022] In the utility model, the inner conical surface at the end of the expansion ring 5 is engaged with the outer conical surface at the left end of the first front ferrule 6, and the inner hole at the right end of the first front ferrule 6 contacts the chamfer at the left end face of the first rear ferrule 7.
[0023] The inner inclined surface at the right end of the extrusion ring 3 is engaged with the outer inclined surface at the left end of the second rear ferrule 9, the outer inclined surface at the right end of the second rear ferrule 9 contacts the inner inclined surface at the left end of the second front ferrule 10, and the outer conical surface at the right end of the second front ferrule 10 is engaged with the inner conical surface in the test joint 2.
[0024] Specifically, the pressing member 1 is a pressing nut, and the second step surface on the periphery of the pressing nut is engaged with the end face of the expansion ring 5.
[0025] As Figure 2 shown, the inner sealing hole 202 of the test joint 2 and the outer circle of the expansion ring 5 are initially in clearance fit.
[0026] The ferrule tube 8 passes through the compression nut 1, expansion ring 5, first front ferrule 6, first rear ferrule 7, extrusion ring 3, second rear ferrule 9, and second front ferrule 10, and is positioned at the left end face of the second stepped hole at the left end of the test joint 2. The compression nut 1 enters the left end threaded hole of the test joint 2 to squeeze the expansion ring 5. The outer diameter of the expansion ring 5 expands and undergoes extrusion interference sealing with the inner sealing hole 202 at the left end of the test joint 2. The expansion ring 5 squeezes the front ferrule 6, and the outer cone of the front ferrule 6 and the inner cone of the expansion ring 5 undergo extrusion to form a conical surface seal. The inner hole of the front ferrule 6 and the outer diameter of the ferrule tube 8 form an interference metal seal. The front ferrule 6 squeezes the rear ferrule 7, and the inner hole of the rear ferrule 7 deforms, and the inner hole shrinks to hold the ferrule tube 8 tightly. Since the extrusion ring 3 is squeezed by the rear ferrule 7, the extrusion ring 3 will sequentially squeeze the rear ferrule 9 and the front ferrule 10. The front ferrule 10 will form an interference metal seal with the inner tapered hole at the left end of the test joint 2, and the rear ferrule 9 will also hold the ferrule tube 8 tightly. The threaded hole 201 at the upper end of the test joint 2 is a test hole. Pressurize through the test hole 201 to test whether the seal of the ferrule tube is good.
[0027] As Figure 2 shown, the inner sealing hole 202 of the test joint 2 and the outer diameter of the expansion ring 5 are initially in a small clearance fit, which further improves the convenience of assembly. However, due to the small clearance, when the expansion ring 5 is squeezed by the compression nut 1, it can quickly form an interference metal seal, ensuring the reliability of verifying the seal of the ferrule tube and preventing leakage during operation, resulting in unnecessary losses.
[0028] In the present utility model, when the compression nut 1 squeezes the expansion ring 5, it will sequentially squeeze the expansion ring 5, first front ferrule 6, first rear ferrule 7, extrusion ring 3, second rear ferrule 9, and second front ferrule 10 in the above order, such that the outer conical surface of the second front ferrule 10 and the inner conical surface of the inner hole at the left end of the test joint 2 form an interference metal seal, the inner hole of the second front ferrule 10 and the outer diameter of the ferrule tube 8 form an interference metal seal, the first rear ferrule 7 and the second rear ferrule 9 hold the ferrule tube 8 tightly, the outer conical surface of the first front ferrule 6 and the inner conical surface of the expansion ring 5 form an interference metal seal, the inner hole of the first front ferrule 6 and the ferrule tube 8 form an interference metal seal, and the outer diameter of the expansion ring 5 and the inner sealing 202 hole of the test joint 2 form an interference metal seal. Pressurize through the test hole 201 of the test joint 2 to test the seal of the ferrule tube.
[0029] Preferably, as Figure 1 shown, the inner sealing hole 202 of the test joint 2 and the expansion ring 5 are initially in a small clearance fit, which further improves the convenience of assembly. However, due to the small clearance, when the expansion ring 5 is squeezed by the compression nut, it can quickly form an interference metal seal, ensuring the reliability of verifying the seal of the ferrule tube and preventing leakage during operation, resulting in unnecessary losses.
[0030] Preferably, as Figure 1 shown, the left inclined surface of the extrusion ring 3 engages with the right inclined surface of the first rear ferrule 7, and the right inclined surface of the extrusion ring 3 engages with the left inclined surface of the second rear ferrule 9. Due to the action of the extrusion force, the second rear ferrule 9 and the second front ferrule 10 undergo slight extrusion deformation. The outer conical surface of the second front ferrule 10 forms an interference metal seal with the conical surface of the inner hole at the left end of the test joint 2. The second rear ferrule 9 produces a hinge action inward to form a strong clamping force on the ferrule tube. The design of the extrusion ring 3 ensures that the double ferrule can complete the sealing test of the ferrule tube without interference. Finally, the test hole is blocked by a sealing plug 11 with a self-sealing thread.
[0031] The working principle of the present utility model:
[0032] A compression nut is connected to the left end of the test joint 2. An expansion ring 5, a first front ferrule 6, a first rear ferrule 7, an extrusion ring 3, a second rear ferrule 9, and a second front ferrule 10 are sequentially installed in the inner sealing hole 202 at the left end of the test joint 2. When the compression nut 1 squeezes the expansion ring 5, it will sequentially squeeze the expansion ring 5, the first front ferrule 6, the first rear ferrule 7, the extrusion ring 3, the second rear ferrule 9, and the second front ferrule 10 in this order, causing an interference metal seal between the outer conical surface of the second front ferrule 10 and the inner conical surface of the inner hole at the left end of the test joint 2, an interference metal seal between the inner hole of the second front ferrule 10 and the outer circle of the ferrule tube 8, the first rear ferrule 7 and the second rear ferrule 9 clamping the ferrule tube 8, an interference metal seal between the outer conical surface of the first front ferrule 6 and the inner conical surface of the expansion ring 5, an interference metal seal between the inner hole of the first front ferrule 6 and the ferrule tube 8, and an interference metal seal between the outer circle of the expansion ring 5 and the inner sealing 202 hole of the test joint 2. The test joint 2 is pressurized through the test hole 201 to test the ferrule joint. After the pressurization is completed, the test hole 201 is sealed with a threaded sealing plug 11 with a self-sealing feature.
[0033] For those skilled in the art, it is obvious that the above specific examples are only the preferred solutions of the present utility model. Therefore, any improvements and changes that those skilled in the art may make to some parts of the present utility model still embody the principle of the present utility model and achieve the purpose of the present utility model, and all fall within the scope protected by the present utility model.
Claims
1. A device for detecting and sealing a two-way clamping card sleeve tube, characterized in that, Comprising: A test joint (2), an inner sealing hole (202) is formed in the test joint (2), and a test hole (201) communicating with the inner sealing hole (202) is formed on one side of the test joint (2); an expansion ring (5), a ferrule, and a pressing ring (3) are sequentially installed in the inner sealing hole (202), the inner sealing hole (202) is installed on a ferrule tube (8) through a pressing member (1), the ferrule tube (8) passes through the pressing member (1), the expansion ring (5), the ferrule, and the pressing ring (3), and is positioned in the inner sealing hole (202) of the test joint (2); a double male joint (4) is connected to the other end of the test joint (2); a sealing plug (11) is installed in the test hole (201).
2. The device for detecting and sealing a two-way locking card sleeve according to claim 1, characterized in that, The ferrule includes a first ferrule and a second ferrule disposed at both ends of the pressing ring (3), and the expansion ring (5) contacts the first ferrule.
3. The device for detecting and sealing the two-way clamping card sleeve according to claim 2, characterized in that, The first ferrule includes: a first front ferrule (6) and a first rear ferrule (7), and the second ferrule includes: a second rear ferrule (9) and a second front ferrule (10).
4. The device for detecting and sealing a two-way locking ferrule according to claim 3, characterized in that, The inner conical surface at the end of the expansion ring (5) is engaged with the outer conical surface at the left end of the first front ferrule (6), and the inner hole at the right end of the first front ferrule (6) contacts the chamfer at the left end face of the first rear ferrule (7).
5. The device for detecting and sealing a two-way locking ferrule according to claim 3 or 4, characterized in that, The inner inclined surface at the right end of the pressing ring (3) is engaged with the outer inclined surface at the left end of the second rear ferrule (9), the outer inclined surface at the right end of the second rear ferrule (9) contacts the inner inclined surface at the left end of the second front ferrule (10), and the outer conical surface at the right end of the second front ferrule (10) is engaged with the inner conical surface in the test joint (2).
6. The device for detecting and sealing a two-way locking card sleeve according to claim 1, characterized in that, The pressing member (1) is a pressing nut, and the second step surface on the periphery of the pressing nut is engaged with the end face of the expansion ring (5).
7. The device for detecting and sealing the two-way locking ferrule according to claim 1, characterized in that, The outer circle of the expansion ring (5) has a clearance fit with the inner sealing hole (202).
8. The device for detecting and sealing the two-way locking card sleeve according to claim 1, characterized in that, The test hole (201) is sealed by a plug (11) with a sealing thread.