Setting prevention tool for high-pressure test of packer

Abstract

The utility model relates to the technical field of packer detection, in particular to an anti-setting tool for high-pressure testing of a packer, which comprises an upper connecting piece, a lower connecting piece, a lower connecting piece, an upper connecting piece and a lower connecting piece, the annular sleeve-shaped structure has an opening state in which the annular sleeve-shaped structure is opened so as to be laterally mounted to the upper part of the packer and a closing state in which the annular sleeve-shaped structure is enclosed so as to wrap the upper part of the packer and is locked through a fastening mechanism; the lower connecting piece is used for being fixedly connected with the lower portion of the packer, and the upper connecting piece and the lower connecting piece are directly connected through matched thread structures. According to the utility model, through the original direct threaded connection scheme of the upper connecting piece and the lower connecting piece, the number of core components is reduced from at least three to two, the fundamental structure simplification is realized, and through the strong pre-tightening force provided by threaded connection, the reliability of the structure is improved. It is ensured that the frame has excellent structural stability and reliability when bearing huge axial thrust generated by a high-pressure test.

Description

Technical Field

[0001] This utility model relates to the field of packer testing technology, and in particular to an anti-seating tooling for high-pressure testing of packers. Background Technology

[0002] As a critical downhole tool in oil and gas well operations, packers must undergo high-pressure sealing tests before leaving the factory to verify their sealing reliability under simulated downhole conditions. During the test, high-pressure fluid is injected into the packer's internal cavity and the pressure is maintained at a stable level. However, when the test pressure increases, the axial thrust generated inside the packer may shear off its internal shear pins, causing the packer to set unexpectedly, resulting in product damage and test failure.

[0003] To address the aforementioned technical problems, existing technologies have proposed corresponding solutions. For example, Chinese Patent Publication No. CN222353452U discloses a packer test pressure rubber sleeve constraint device, which effectively prevents the packer from accidentally setting during testing through the combined action of a radial limiting sleeve, an upper clamp, and a lower clamp.

[0004] However, the above-mentioned device has obvious defects: First, it must rely on the coordinated assembly of at least three independent large components, namely the radial limiting sleeve, the upper clamp, and the lower clamp, which results in a complex overall structure and cumbersome installation and disassembly steps; Second, the force transmission path of the device depends on the mating surfaces between multiple components, which poses the risk of low force transmission efficiency and insufficient structural stability; Third, the multiple independent components are inconvenient to manage after disassembly, and there is a risk of components being scattered or lost.

[0005] Therefore, it is crucial to develop a tooling that, while ensuring effective anti-seizing function, not only significantly simplifies the overall structure of the protective tooling and reduces the number of core components, but also optimizes the force transmission path, improves structural stability, enables faster installation and disassembly, and reduces the complexity of component management and the risk of loss. Utility Model Content

[0006] In view of this, the purpose of this utility model is to propose an anti-seating tooling for high-pressure testing of packers, so as to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, this utility model provides an anti-seating fixture for high-pressure testing of packers, comprising:

[0008] The upper connector includes a rotatably connected openable annular sleeve structure and a fastening mechanism. The annular sleeve structure has an open state for laterally mounting to the upper part of the packer, and a closed state for surrounding and enclosing the upper part of the packer and locking it by the fastening mechanism.

[0009] The upper connecting piece and the lower connecting piece are directly connected through a thread structure, and together form a rigid external constraint frame.

[0010] The lower connecting piece comprises a locking sleeve, which has a limiting boss, and a limiting member is arranged in an outer circumferential groove of the lower part of the packer.

[0011] The limiting member is a split clasp ring, and the clasp ring comprises at least two half rings.

[0012] The outer circumferential surface of the half ring is provided with a recessed groove, and an elastic sealing ring is arranged in the recessed groove.

[0013] The annular sleeve structure is a rotary body, which is cut into two symmetrical parts, and one end is rotationally connected through a hinge, and the other end is locked through the fastening mechanism.

[0014] The inner wall of the annular sleeve structure is provided with an inner hole boss, which is matched with an annular groove on the outer circumferential surface of the upper part of the packer, so as to limit the movement of the upper part of the packer.

[0015] The body of the upper connecting piece and / or the lower connecting piece is provided with a weight-reducing through hole or a weight-reducing through groove.

[0016] The utility model has the advantages of:

[0017] 1. The structure is simplified and the operation efficiency is improved: the utility model directly connects the upper connecting piece and the lower connecting piece through the thread connection scheme, reduces the core components from at least three to two, and fundamentally simplifies the structure. This improvement reduces the installation steps by about 50%, shortens the installation time by more than 40%, and greatly improves the test efficiency. At the same time, the reduction of the number of components significantly reduces the difficulty of component management, effectively prevents the risk of component scattering and loss.

[0018] 2. Mechanical properties and reliability enhancement: The overall rigid restraint frame constructed by the utility model establishes a more direct and efficient force transmission path. Through the strong pre-tightening force provided by the threaded connection, it ensures that the frame has excellent structural stability and reliability when bearing the huge axial thrust generated by high pressure testing, effectively avoiding the loosening and micro-deformation problems that may occur in the connection of multiple components in the prior art, providing more reliable protection for high pressure testing.

[0019] 3. Generalization and adaptability expansion: The split ring structure and elastic sealing ring design of the lower connecting piece enable the tooling to adapt to the standard grooves of packers of different specifications, solving the dependency of the prior art on specific structure packers. This improvement significantly expands the application range of the tooling, reduces the number of special tooling configurations, and saves equipment investment costs for users.

[0020] 4. Use economy and durability improvement: By scientifically setting weight-reducing holes or grooves on the upper connecting piece and / or the lower connecting piece, lightweight design is achieved while ensuring structural strength, not only reducing the labor intensity of the operating personnel, but also reducing material costs. In combination with the anti-wear design of the elastic sealing ring, the service life of the tooling is effectively extended, improving the economy and service life of the equipment as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0022] Figure 1 It is the main sectional structure schematic diagram of the utility model;

[0023] Figure 2 It is the three-dimensional structure schematic diagram of the upper connecting piece of the utility model;

[0024] Figure 3 It is the three-dimensional structure schematic diagram of the lower connecting piece of the utility model;

[0025] Figure 4 It is the three-dimensional structure schematic diagram of the semi-ring of the utility model;

[0026] Figure 5 It is the half sectional structure schematic diagram of the utility model after butting with the packer;

[0027] Figure 6 It is the three-dimensional structure schematic diagram of the upper connecting piece of the utility model;

[0028] Figure 7The utility model discloses a whole external three-dimensional structure schematic diagram.

[0029] In the figure, marked: 1, lower connecting piece, 11, limit boss, 2, O ring, 3, half ring, 4, upper connecting piece, 41, cutting gap, 42, weight reduction groove, 43, inner hole boss, 44, hinge installation position, 45, fastening mechanism installation position, 46, hinge, 47, fastening mechanism, 5, packer. DETAILED DESCRIPTION

[0030] In order to make the utility model's purpose, technical scheme and advantage more clearly, following combining with specific embodiment, the utility model is further detailed.

[0031] It is to be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model should be the usual meaning understood by the person skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, which can change accordingly when the absolute position of the described object changes.

[0032] As shown in Figure 1 , Figure 5 and Figure 7 , a packer high-pressure test anti-seating tool, comprising: an upper connecting piece 4, comprising a rotatably connected openable annular sleeve structure and a fastening mechanism 47, the annular sleeve structure has an open state opened to be laterally mounted on the upper part of the packer 5, and a closed state enclosed to wrap the upper part of the packer 5 and locked by the fastening mechanism 47; a lower connecting piece 1 for fixed connection with the lower part of the packer 5, the upper connecting piece 4 and the lower connecting piece 1 are directly connected through the matching thread structure, together forming a rigid external constraint frame, the upper connecting piece 4 and the lower connecting piece 1 are respectively provided with axial positioning structure for engaging with the corresponding parts of the packer 5, when high-pressure test is carried out, the axial positioning structure and the external constraint frame jointly limit the axial relative movement between the upper part and the lower part of the packer 5;

[0033] The technical scheme can solve the problems of complex structure, complicated installation process, and long time consumption caused by the cooperation of at least three independent large components, i.e., the radial limiting sleeve, the upper clamp, and the lower clamp. Specifically, the whole frame design concept is adopted, the upper connecting piece 4 is directly screwed with the lower connecting piece 1, and a rigid external constraint frame with simple structure and superior mechanical properties is constructed. The working principle is that the strong pre-tightening force provided by the screw connection makes the upper connecting piece 4 and the lower connecting piece 1 form a stable whole structure, and the axial positioning structure arranged on the two is engaged with the upper and lower parts of the packer 5, thereby establishing a reliable force transmission path outside the packer 5. In the specific operation, the technician first laterally sleeves the upper connecting piece 4 in the opened state on the upper part of the packer 5, preliminarily engages the axial positioning structure with the corresponding part of the upper part of the packer 5, then closes and locks through the fastening mechanism 47, and then screws the lower connecting piece 1 from one end of the packer 5 to connect with the upper connecting piece 4 through the screw, until the specified pre-tightening torque is reached. At this time, the axial positioning structure of the lower connecting piece 1 is also fully engaged with the corresponding part of the lower part of the packer 5, that is, the installation of the whole tool is completed, and the same or even better anti-seating function is realized by using only two core components, the overall structure is significantly simplified, the installation steps are reduced, and the disassembly efficiency is improved by more than 40%, and the risk of misloading and missing loading caused by too many components is reduced.

[0034] As shown in Figure 3 , Figure 4 and Figure 5 , in the present embodiment, the lower connecting piece 1 includes a locking sleeve having a limiting boss 11, and a limiting piece is arranged in the circumferential groove of the lower part of the packer 5. When the locking sleeve is connected with the upper connecting piece 4, the limiting boss 11 is engaged with the limiting piece, thereby limiting the movement of the lower part of the packer 5.

[0035] The technical scheme can optimize the complicated process of independently installing, accurately adjusting, and centering the lower clamp in the prior art. Specifically, the working principle is to realize the automatic locking and force transmission of the lower part by mechanical interference between the limiting boss 11 of the locking sleeve and the pre-installed limiting piece. In the specific operation, the limiting piece is accurately clamped into the circumferential groove specially designed on the lower part of the packer 5. When the locking sleeve is screwed with the upper connecting piece 4, the limiting boss 11 will automatically form a close surface contact with the upper surface of the limiting piece, and a reliable constraint fit is generated when the test pressure is borne. The technical effect of quickly and accurately positioning and automatically locking the lower assembly, significantly reducing the installation and adjustment time, and improving the overall installation efficiency by about 30% is realized. At the same time, the continuity and stability of the force transmission path are ensured by the surface contact design, and the stress concentration phenomenon is effectively avoided.

[0036] As shown in Figure 1 , Figure 4 and Figure 5As shown, in this embodiment, the limiting member is a split retaining ring, which includes at least two half-rings 3;

[0037] The above technical solution solves the problem of the integral ring component being unable to be installed on the packer 5 with a boss structure. Specifically, its working principle utilizes the assembly characteristics of the split structure to achieve rapid installation while maintaining sufficient structural rigidity to withstand the high-pressure load during testing. During operation, the two half-rings 3 are combined from both sides and inserted into the outer peripheral groove at the bottom of the packer 5. The rigidity of the half-rings 3 ensures that they will not undergo elastic deformation when subjected to axial thrust, thus providing stable constraint force. Furthermore, by replacing the half-rings 3 with different specifications, packers 5 of different diameters can be accommodated, significantly improving the tooling versatility.

[0038] like Figure 1 , Figure 3 and Figure 5 As shown, in this embodiment, a recessed groove is provided on the outer circumferential surface of the semi-ring 3, and an elastic sealing ring is placed in the recessed groove. The side of the elastic sealing ring away from the recessed groove is in contact with the inner wall of the locking sleeve. The elastic sealing ring is an O-ring 2.

[0039] The above technical solution can solve the problems of fretting wear, stress concentration, loose fit, and abnormal noise in traditional metal-to-metal rigid contact. Specifically, its working principle utilizes the multiple functions of the elastic sealing ring: it fills the fit gap through compression deformation, provides appropriate frictional resistance, and buffers vibration. During operation, as the locking sleeve tightens, its inner wall continuously compresses the elastic sealing ring until the optimal fit is achieved. At this point, the elastic sealing ring provides both additional tightening force and buffering and vibration reduction. This significantly reduces the wear rate of the contact surface, extends the service life of components by more than 2 times, improves connection stability, and eliminates abnormal noise. Simultaneously, the sealing ring also provides an additional anti-loosening function, ensuring stable connection performance during long-term use.

[0040] like Figure 2 and Figure 6 As shown, in this embodiment, the annular sleeve structure is a rotating body that is cut into two symmetrical parts. One end is connected by a hinge 46, and the other end is locked by a fastening mechanism 47.

[0041] The above technical solution solves the problem of inconvenient installation caused by the traditional integral sleeve requiring insertion from the end of the packer 5. Specifically, its working principle is to use a hinge-type opening and closing design to simulate the movement of a clamshell, enabling quick assembly and disassembly. During operation, simply loosen the fastening mechanism 47, and the annular sleeve structure can rotate around the hinge 46 axis to open to a maximum position of 180 degrees; during installation, rotate in the opposite direction to close, and reliably lock it through the fastening mechanism 47. At the same time, the hinge 46 connection ensures that the two parts always remain connected, avoiding the hassle of managing multiple components separately.

[0042] As Figure 2 , Figure 5 and Figure 6 shown, in this embodiment, the inner wall of the annular sleeve structure is provided with an inner hole boss 43 which is matched with the annular groove on the outer circumferential surface of the upper part of the packer 5, thereby limiting the movement of the upper part of the packer 5.

[0043] The above technical solution can solve the problem that the upper connecting piece 4 and the packer 5 are not firmly connected and are easy to displace. Specifically, the working principle is to realize bidirectional positioning and force transmission by precise mechanical cooperation of the boss and the groove. When the upper connecting piece 4 is closed, the inner hole boss 43 is automatically and accurately clamped into the annular groove on the upper part of the packer 5, forming a firm mechanical connection, accurately positioning and reliably restraining the movement of the upper part of the packer 5, optimizing the force transmission path, and at the same time, this cooperation ensures effective force transmission during high-pressure testing, avoiding excessive local stress.

[0044] As Figure 2 , Figure 3 and Figure 7 shown, in this embodiment, the body of the upper connecting piece 4 and / or the lower connecting piece 1 is provided with a weight-reducing through hole or a weight-reducing through groove 42.

[0045] The above technical solution can solve the problems of excessive overall weight, difficulty in carrying and high labor intensity caused by multiple large metal parts in the prior art. Specifically, the working principle is topological optimization design based on finite element analysis, which scientifically removes redundant materials in non-main bearing areas on the premise of ensuring the material integrity of the key stress area. The feature is formed by numerical control machining at one time during workpiece manufacturing. The arrangement of the weight-reducing through groove 42 is calculated by mechanics to ensure that it does not affect the overall structural strength, significantly reduces the weight of the tool by about 25%-35%, greatly improves the operation convenience, reduces the labor intensity of the operator, saves the cost of raw materials by 15%-20%, and the weight-reducing through groove 42 design also provides a convenient condition for observing the test state.

[0046] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to suggest that the scope of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above. In order to be brief, they are not provided in detail.

[0047] The utility model aims at covering all such replacement, modification and variation falling into the protection scope. Therefore, any omission, modification, equivalent replacement, improvement and the like made in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A packer high pressure testing anti-set-up tool, characterized in that, The utility model relates to a kind of high-pressure test device for packer, including: Upper connecting piece (4) including rotatably connected openable ring sleeve structure and fastening mechanism (47), the ring sleeve structure has opening state opened to be mounted from lateral to the upper portion of packer (5), and closed state is enclosed to wrap the upper portion of packer (5) and is locked by fastening mechanism (47); Lower connecting piece (1) is used to be fixedly connected with the lower portion of packer (5), and the upper connecting piece (4) is directly connected with lower connecting piece (1) by interfitting thread structure, and it is collectively formed into a rigid external constraint frame, and the upper connecting piece (4) and lower connecting piece (1) are respectively provided with axial positioning structure for engaging with corresponding parts of packer (5), and when high-pressure test is carried out, axial relative motion between the upper portion and the lower portion of packer (5) is limited by the cooperation of the axial positioning structure and the external constraint frame.

2. The anti-set packing tool for packer high pressure testing of claim 1, wherein, The lower connecting piece (1) includes locking sleeve, which has a limiting boss (11), and the outer circumferential groove of the lower portion of the packer (5) is provided with a limiting part, when the locking sleeve is connected with the upper connecting piece (4), the limiting boss (11) is engaged with the limiting part, so as to limit the movement of the lower portion of the packer (5).

3. The anti-set packing tool for packer high pressure testing of claim 2, wherein, The limiting part is a split type snap ring, and the snap ring includes at least two half rings (3).

4. The anti-set packing tool for packer high pressure testing of claim 3, wherein, A recessed groove is formed on the outer circumferential surface of the half ring (3), and an elastic sealing ring is arranged in the recessed groove, and the side of the elastic sealing ring away from the recessed groove is attached to the inner wall of the locking sleeve.

5. The anti-set packing tool for packer high pressure testing of claim 1, wherein, The ring sleeve structure is a revolution body, which is cut into two symmetrical parts, then one end is rotatably connected through the hinge (46), and the other end is locked through the fastening mechanism (47).

6. The anti-set packing tool for packer high pressure testing of claim 5, wherein, The inner wall of the ring sleeve structure is provided with an inner hole boss (43), and the inner hole boss (43) is matched with the annular groove on the outer circumferential surface of the upper portion of the packer (5), so as to limit the movement of the upper portion of the packer (5).

7. The anti-set packing tool for high pressure testing of packers according to any one of claims 1-6, characterized in that, Weight-reducing through holes or weight-reducing through grooves (42) are formed on the body of the upper connecting piece (4) and / or the lower connecting piece (1).

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