High-pressure-resistant leather cup for pressure test blanking plug
By introducing coil spring support skeleton and iron core structure into the pressure-test blocker leather bowl, the problem of tearing of existing leather bowls under high pressure is solved, achieving higher sealing pressure tolerance and extended service life.
Patent Information
- Application Number
- CN202411382669.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2024-12-17
AI Technical Summary
The existing pressure test clogger leather bowls are prone to tear at pressures above 70MPa, which cannot meet the demand for casing sealing pressure tests in drilling technology.
The coil spring support frame and iron core structure are introduced into the pressure-test blocker leather bowl, and it is integrated with the rubber leather bowl body through thermal technology to form an integrated structure to improve pressure resistance.
The leather bowl can still maintain sealing under a high pressure test of 105MPa, and extends its service life, avoids radial deformation and improves the overall pressure bearing capacity of the structure.
Smart Images
Figure CN119145792A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a high-pressure resistant leather cup structure, in particular to a high-pressure resistant leather cup for a pressure test plugger. Background Art
[0002] The ST pressure test plug is a pressure test tool designed for pressure testing of blowout preventer groups and pipes. During the pressure test, you only need to lower the tool into the pipe or the lower part of the blowout preventer where the pressure needs to be tested to perform the pressure test. It is very easy and reliable to use. After the pressure test is completed, it can be recovered for the next use. The tool actually plays the role of a pipe plug, eliminating the need for pipe plugging and buckling operations. If a simple device is added, it is also convenient for pressure testing of mine pipe stations or pipeline strings. The plug (leather cup) of the tool is made of high-quality rubber material, so that the sealing pressure generally reaches 15MPa~70MPa (150~700kgf / cm 2 ), can meet the use requirements.
[0003] The high-pressure resistant leather cup used in the pressure test plug is installed on the pressure test plug and is the most important pressure-bearing and sealing component. The maximum test pressure of the existing pressure test plug leather cup is generally limited to 70MPa. If a higher pressure test is performed, the leather cup will tear, which can no longer meet the requirements of casing sealing and pressure test operations in existing drilling technology. Summary of the invention
[0004] The purpose of the present invention is to provide a high-pressure resistant leather cup for a pressure test plug. The pressure test plug equipped with the high-pressure resistant leather cup can withstand higher sealing pressure during downhole casing sealing operations, meeting the requirements of high-pressure well sealing operations.
[0005] The technical solution of the present invention is: a high-pressure resistant leather cup for a pressure test plugger, comprising a rubber leather cup body, an iron core is arranged at the rear end of the rubber leather cup body, a spring support frame is arranged inside the rubber leather cup body along its thickness direction, and the spring support frame is a spiral spring structure.
[0006] In the aforementioned high-pressure resistant leather cup for a pressure test plugger, the end of the spring support frame abuts against the iron core.
[0007] In the aforementioned high-pressure resistant leather cup for a pressure test plugger, the iron core is an I-shaped structure, and the end of the spring support skeleton extends into the annular groove of the iron core and abuts against the inner surface of the outer end of the annular groove.
[0008] In the aforementioned high-pressure leather cup for a pressure test plugger, the high-pressure leather cup is made of rubber that is put into a die through a thermal process to integrate a spring support frame, an iron core, and a rubber leather cup body.
[0009] In the aforementioned high-pressure resistant leather cup for a pressure test plugger, the spring support skeleton is arranged in the rubber of the outer layer of the bayonet of the rubber leather cup body, or is arranged in the rubber of the outer layer and inner layer of the bayonet of the rubber leather cup body at the same time.
[0010] In the aforementioned high-pressure resistant leather cup for a pressure test plugger, the spring support skeleton is a cylindrical spring skeleton or a conical spring skeleton. When it is a conical spring skeleton, the small end of the conical spring skeleton abuts against the iron core.
[0011] Beneficial effects of the present invention: Compared with the prior art, the present invention adds a spring support skeleton to the existing leather cup structure, and the spring support skeleton adopts a spiral spring structure. When the leather cup structure is subjected to high pressure in the axial direction, most of the pressure is absorbed by the spring support skeleton as the spiral spring structure is compressed and deformed, and the rubber leather cup only needs to bear a small part of the force. The high-pressure resistant leather cup of the present invention can withstand a high-pressure test of up to 105MPa; at the same time, the spiral spring structure can also prevent the entire leather cup structure from deforming in the radial direction. Adding an iron core can support the spring support skeleton, ensuring that the spring support skeleton can absorb high pressure well. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the present invention.
[0013] Figure numerals: 1-rubber cup body, 2-iron core, 3-spring support frame. DETAILED DESCRIPTION
[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.
[0015] An embodiment of the present invention: A high-pressure resistant leather cup for a pressure test plug includes a rubber leather cup body 1, an iron core 2 is arranged at the rear end of the rubber leather cup body 1, and a spring support skeleton 3 is arranged inside the rubber leather cup body 1 along its thickness direction, and the spring support skeleton 3 is a spiral spring structure.
[0016] The present invention adds a spring support frame 3 to the existing leather cup structure. Since the spring support frame 3 adopts a spiral spring structure, when the high-pressure leather cup is subjected to axial high pressure, the high-pressure leather cup will be deformed. During the deformation process, the spiral spring structure and the rubber leather cup body 1 are both compressed. The spiral spring structure absorbs most of the high pressure during the compression process, while the rubber leather cup body 1 only needs to withstand a small part of the pressure, which allows the entire high-pressure leather cup to withstand higher pressure. Moreover, during the pressure test, the rubber leather cup body 1 is subjected to a lower pressure than the leather cup without the spring support frame 3, thereby increasing the service life of the rubber leather cup body 1. The iron core 2 can support the entire structure.
[0017] The end of the spring support skeleton 3 abuts against the iron core 2, and the spring support skeleton 3 is supported by the iron core 2, so as to ensure that the spring support skeleton 3 can absorb high pressure well during the compression and deformation process.
[0018] The iron core 2 is an I-shaped structure, and the end of the spring support frame 3 extends into the annular groove of the iron core 2 and abuts against the inner surface of the outer end of the annular groove. The iron core 2 of this structure can firmly fix the spring support frame 3.
[0019] The high-pressure resistant rubber cup is put into a mold through a thermal process to integrate the spring support frame 3, the iron core 2, and the rubber cup body 1. The integrated structure can better withstand high pressure.
[0020] The spring support skeleton 3 is arranged in the rubber of the outer layer of the bayonet of the rubber cup body 1. For a large-sized pressure test cup, the spring support skeleton 3 should be arranged in the rubber of the outer layer and the inner layer of the bayonet of the rubber cup body 1. During the pressure test of the pressure test cup, it is ensured that most of the high pressure is absorbed by the spring support skeleton 3.
[0021] The spring support skeleton 3 is a cylindrical spring skeleton or a conical spring skeleton. When it is a conical spring skeleton, the small end of the conical spring skeleton abuts against the iron core 2.
Claims
1. A high pressure resistant leather cup for pressure test plugging device, Features: The rubber cup body (1) comprises an iron core (2) arranged at the rear end of the rubber cup body (1), and a spring support frame (3) arranged inside the rubber cup body (1) along its thickness direction, wherein the spring support frame (3) is a spiral spring structure.
2. A high pressure resistant leather cup for a pressure test plug according to claim 1, Features: The end of the spring support frame (3) abuts against the iron core (2).
3. A high pressure resistant leather cup for a pressure test plug according to claim 2, Features: The iron core (2) is an I-shaped structure, and the end of the spring support frame (3) extends into the annular groove of the iron core (2) and abuts against the inner surface of the outer end of the annular groove.
4. The high pressure resistant leather cup for the pressure test plug according to claim 1, Features: The high-pressure resistant rubber cup is placed in a mold through a thermal process to form a spring support frame (3), an iron core (2), and a rubber cup body (1) into one piece.
5. The high pressure resistant leather cup for the pressure test plug according to claim 1, Features: The spring support skeleton (3) is arranged in the rubber of the outer layer of the bayonet of the rubber leather cup body (1), or is arranged in the rubber of both the outer layer and the inner layer of the bayonet of the rubber leather cup body (1).
6. The high pressure resistant leather cup for the pressure test plug according to claim 1, Features: The spring support skeleton (3) is a cylindrical spring skeleton or a conical spring skeleton. When it is a conical spring skeleton, the small end of the conical spring skeleton abuts against the iron core (2).