Metering room separator fire-free perforation sealing device
By using a sealing sleeve connected to the pipe thread on the metering chamber separator, combined with a removable end cap and sealing gasket, the problem of unsealed perforated pipelines in the dead/blind section of the metering chamber separator was solved, achieving safe and efficient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DAQING OILFIELD CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-12
AI Technical Summary
In the existing technology, the dead and blind sections of the metering separator cannot be effectively sealed after perforation, making hot work repairs impossible and posing a safety hazard.
A fire-free perforation sealing device for metering separators was designed. It utilizes the pipe thread on the inner wall of the sealing cylinder to match the outer diameter of the pipe, and achieves sealing through threaded connection. Combined with detachable end caps, sealing gaskets, and glands, it ensures sealing performance and stability.
It effectively seals the perforated sections of the metering separator's dead/blind pipeline, avoiding hot work operations, improving safety and maintenance efficiency, and reducing maintenance costs.
Smart Images
Figure CN224229540U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oilfield equipment and pipeline maintenance technology, and in particular to a fire-free perforation sealing device for a metering separator. Background Technology
[0002] In oilfield operations, the separators within the metering chamber are equipped with multiple dead / blind sections of pipeline. After prolonged operation, the ends of these dead / blind sections inevitably suffer damage and perforation due to the erosion and compression from the pressurized fluid within the pipeline. However, because the fluid flowing through these dead / blind sections contains flammable and explosive components, hot work is prohibited during maintenance, making the repair work difficult. Existing technology includes a hot work-free pipeline leak repair device that seals the perforation by cutting the pipeline and adding a sleeve to reconnect the two sections. However, this device's structure is unsuitable for repairing perforations in the dead / blind sections of the metering chamber separator due to the inability to install packing or other fixing components at the T-joint. This makes it unsuitable for repairing perforations in the dead / blind sections of the metering chamber separator. Therefore, to address these shortcomings, a hot work-free perforation sealing device for the metering chamber separator is proposed. Summary of the Invention
[0003] The purpose of this invention is to provide a fire-free perforation sealing device for metering separators, which overcomes the shortcomings of existing technologies that cannot seal T-joints at close range and are not suitable for repairing perforations in dead or blind sections of metering separator pipelines.
[0004] To achieve the above objectives, this utility model provides a fire-free perforation sealing device for a metering chamber separator, comprising:
[0005] A sealing cylinder, the inner wall of which is provided with pipe threads, the inner diameter of which matches the outer diameter of the pipe being repaired;
[0006] The top of the sealing cylinder is sealed, and the bottom is open. The top of the pipe to be repaired passes through the opening of the sealing cylinder and engages with the pipe thread.
[0007] The bottom end of the sealing cylinder is provided with a sealing cap, and the sealing cap has a through installation hole in the middle. The pipe to be repaired passes through the installation hole and is inserted into the sealing cylinder to be threaded together.
[0008] Preferably, the top of the sealing cylinder is provided with an end cap, which is detachably connected to the sealing cylinder and seals the top of the sealing cylinder.
[0009] Preferably, the end cap is connected to the top of the sealing cylinder by a thread.
[0010] Preferably, a sealing gasket is provided between the end cap and the top of the sealing cylinder.
[0011] Preferably, the inner wall of the bottom end of the sealing cylinder is provided with a plurality of sealing grooves arranged circumferentially, and each sealing groove is provided with an inner sealing ring.
[0012] Preferably, an end sealing ring is provided between the bottom end of the sealing cylinder and the sealing gland.
[0013] The fire-free perforation sealing device for a metering chamber separator provided by this utility model has the following beneficial effects:
[0014] The metering separator perforation sealing device provided by this utility model has a pipe thread inside the sealing cylinder. After the thread is machined on the pipeline to be treated, the sealing cylinder can be directly connected to the pipeline to be treated through the thread. There is no need to install additional fixing devices such as flanges. The perforation is sealed and the installation space required is small. At the same time, the device is reinforced and sealed by a sealing end cap at the bottom of the sealing cylinder, thereby completing the non-hot work treatment of the perforation of the separator. Attached Figure Description
[0015] Figure 1 This is a structural diagram of the fire-free perforation sealing device for the metering chamber separator.
[0016] Legend:
[0017] 1. End cap; 2. Sealing cylinder; 3. Sealing gland; 4. Sealing gasket; 5. Pipe thread; 6. Inner sealing ring; 7. End sealing ring. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] like Figure 1 As shown, the structure of the fire-free perforation sealing device for the metering chamber separator provided by this utility model includes:
[0020] A sealing cylinder 2 has a pipe thread 5 on its inner wall, the inner diameter of which matches the outer diameter of the pipe being repaired. The sealing cylinder 2, as the main body of the device, is used to treat perforations in dead / blind sections of the metering pipeline. After a perforation occurs, the fluid in the pipeline flows out from the perforation. Since the fluid in the dead / blind sections of the separator is generally flammable and explosive, care must be taken to avoid open flame operations and contact between flammable and explosive materials and ignition sources during maintenance and treatment. In use, the sealing cylinder 2 is installed at the perforation location of the dead / blind section pipeline. When the sealing cylinder 2 coincides with the perforation location, it seals the perforation. The sealing cylinder 2 is then fixed at the perforation and sealed, thus sealing the pipeline after treating the perforation. At this point, the liquid in the pipeline flows out from the perforation and contacts the sealing cylinder 2. The sealing cylinder 2 replaces the original pipeline in receiving the pressure and erosion of the fluid inside the pipeline. The sealing cylinder 2 and the perforated pipeline cooperate to form a new, complete pipeline, thereby completing the pipeline repair. When maintaining the dead / blind section of the separator pipeline, it is necessary to fix the position between the sealing cylinder 2 and the pipeline to be treated. In addition to the stability of the connection, the sealing cylinder 2 and the pipeline to be treated also need to have good sealing performance. Therefore, considering the economy, the threaded connection between the sealing cylinder 2 and the pipeline to be treated is the most suitable connection method.
[0021] By providing a pipe thread 5 on the inner wall of the sealing cylinder 2, with the inner diameter of the pipe thread 5 matching the outer diameter of the pipe to be repaired, the sealing cylinder 2 can be connected to the pipeline to be repaired during installation via the pipe thread 5. During maintenance, tools such as a die or pipe reamer are typically used to machine an external thread that matches the pipe thread 5 at the end of the pipe to be repaired. The sealing cylinder 2 is then fitted onto the machined external thread and rotated to ensure full engagement between the pipe thread 5 and the external thread, thus completing the connection between the sealing cylinder 2 and the pipeline to be repaired.
[0022] In this invention, the top of the sealing cylinder 2 is sealed, while the bottom is open. The top of the pipe to be repaired passes through the opening of the sealing cylinder 2 and engages with the pipe thread 5. When the sealing cylinder 2 is connected to the end of the pipe to be treated, due to the seal at the top of the sealing cylinder 2, the pipe and the sealing cylinder 2 cooperate to form a new dead-end section of the pipe, thereby achieving maintenance of the dead-end section of the separator after perforation and restoring the working capacity of the pipe. To improve the sealing performance and working efficiency of the device, the pipe thread 5 is usually located at the top of the inner wall of the sealing cylinder 2. When the sealing cylinder 2 is installed on the pipe to be repaired, the top of the pipe extends into the sealing cylinder 2 and connects with the pipe thread 5. At this time, the bottom wall of the sealing cylinder 2 wraps around the outer wall of the pipe, sealing the perforation of the pipe, thereby completing the sealing of the perforated pipe. In actual work, if the distance between the perforation point and the end of the pipeline is too far, making it impossible for the sealing cylinder 2 to cover the perforation point, a cutting tool that does not require open flame, such as a hacksaw or a pipeline cutter, can be used to cut the pipeline so that the perforation point is within the coverage area of the sealing cylinder 2. Then, the remaining part of the pipeline can be threaded and the sealing cylinder 2 can be installed to repair the perforated pipeline.
[0023] The sealing cylinder 2 has an end cap 1 at its top, which is detachably connected to the sealing cylinder 2 and seals the top of the sealing cylinder 2. After the sealing cylinder 2 is installed at the end of the pipeline to be repaired, the fluid impact force in the pipeline acts on the inner wall of the top of the sealing cylinder 2. Since the fluid pressure in different pipelines is different, the pressure on the inner wall of the top of the sealing cylinder 2 also changes accordingly. In order to adapt to different fluid pressures and avoid repeated damage to the repaired pipeline in a short period of time due to insufficient strength of the sealing cylinder 2, the top of the sealing cylinder 2 is sealed by the detachable end cap 1. On the one hand, after the sealing cylinder 2 is installed, the maximum pressure that the end cap 1 can withstand can be changed by changing the material or thickness of the end cap 1. During maintenance, only the end cap of different models and materials needs to be replaced to adjust the pressure limit that the top of the device can withstand to a level that matches the pressure of the fluid in the maintenance pipeline. There is no need to replace the entire device, thereby improving the practicality and applicability of the device. On the other hand, after the device has been maintained on the pipeline, it may be damaged or perforated under the erosion of the pressurized fluid, just like the pipeline. At this time, only the end cap 1 or the sealing cylinder 2 needs to be replaced according to the location of the damage to restore the device, thereby improving the economy of the device during operation.
[0024] It should be noted that the end cap 1 and the top of the sealing cylinder 2 are connected by threads. This threaded connection allows for the connection of the end cap 1 and the sealing cylinder 2 without compromising their structural strength. Furthermore, compared to other detachable connection methods, the threaded connection offers better sealing and better maintains the device's ability to maintain pipeline maintenance. To further improve the device's sealing performance, a sealing gasket 4 is provided between the top of the end cap 1 and the top of the sealing cylinder 2. The sealing gasket 4 is typically made of materials with good elasticity and ductility, such as rubber or polytetrafluoroethylene. The sealing gasket 4 is usually annular or circular and its diameter is slightly larger than that of the sealing cylinder 2. Before connecting the sealing cylinder 2 to the end cap 1, the sealing gasket 4 is placed inside the end cap 1. Then, the end cap 1 is installed on the sealing cylinder 2. As the connection between the end cap 1 and the sealing cylinder 2 gradually tightens, the end cap 1 and the sealing cylinder 2 gradually clamp the sealing gasket 4. At this time, the sealing gasket 4 is squeezed and fills the gap between the end cap 1 and the sealing cylinder 2, thereby sealing the gap between the end cap 1 and the sealing cylinder 2 and preventing the fluid in the pipeline from flowing out from the gap between the end cap 1 and the sealing cylinder 2, thereby improving the sealing performance of the device.
[0025] like Figure 1 As shown, the sealing cylinder 2 has a sealing cap 3 at its bottom end. The sealing cap 3 has a through mounting hole in the middle. The pipe to be repaired passes through the mounting hole and enters the sealing cylinder 2 to connect with the pipe thread 5. The sealing cap 3 is used to seal the bottom end of the sealing cylinder 2. After the sealing cylinder 2 is connected to the pipeline being repaired, the pipeline surface may be damaged by perforation or other defects under the action of the internal pressure fluid. The pressure fluid inside the pipeline may flow through the cracks formed by the perforation to the space between the inner wall of the sealing cylinder 2 and the outer wall of the pipeline being repaired, and then flow out from the gap at the bottom end of the sealing cylinder 2. At this time, installing the sealing cap 3 at the bottom end of the sealing cylinder 2 can seal the gap between the bottom end of the sealing cylinder 2 and the pipeline being repaired, preventing the fluid from flowing out from the bottom end of the sealing cylinder 2.
[0026] The sealing cylinder 2 has multiple circumferentially arranged sealing grooves on its inner wall at the bottom, and each sealing groove contains an inner sealing ring 6. Before installing the sealing cylinder 2, the inner sealing ring 6 is first installed in the sealing groove, and then the sealing cylinder 2 is installed at the end of the pipeline being maintained. At this time, the inner wall of the sealing groove and the outer wall of the pipeline being maintained compress the inner sealing ring 6. Under the action of its own elasticity, the inner sealing ring 6 deforms and extends to fill the surrounding gaps while tightly fitting with the outer wall of the pipeline and the sealing groove. When fluid flows out from the perforation, it is blocked by the inner sealing ring 6 and cannot flow downward, thereby achieving a seal on the bottom of the sealing cylinder 2 and further improving the sealing performance of the device.
[0027] It should be noted that an end sealing ring 7 is provided between the bottom end of the sealing cylinder 2 and the sealing gland 3. The structure and function of the end sealing ring 7 are the same as those of the sealing gasket 4. When the sealing gland 3 is installed, as the connection between the sealing gland 3 and the bottom end of the sealing cylinder 2 gradually tightens, the sealing gland 3 and the bottom end of the sealing cylinder 2 gradually compress the end sealing ring 7. After being compressed, the end sealing ring 7 deforms and fills the gap between the sealing gland 3, the bottom end of the sealing cylinder 2, and the pipeline, thereby preventing liquid from flowing into the gap between the sealing gland 3 and the inner wall of the sealing cylinder 2 and allowing it to escape, thus improving the sealing performance of the device. In addition, in actual operation, the sealing gasket 4 and the end sealing ring 7 can replace the end cap 1 and the sealing gland to withstand part of the erosion of the pressurized fluid, thereby reducing the failure rate of the device and increasing its service life.
[0028] Combination Figure 1 The following describes in detail the steps for using this fire-free perforation sealing device for metering chamber separators:
[0029] First, the staff selects the appropriate end caps and sealing sleeves based on the fluid pressure in the pipeline being repaired. Choosing different materials and models of end caps for different fluid pressures allows for adjustments to the end caps and their stress limits, ensuring they are matched to the fluid pressure.
[0030] Then, the pipeline is cut according to the location of the perforation and damage. The workers cut the pipeline according to the length of the sealing cylinder and the distance from the perforation and damage location to the end, so that the perforation location in the remaining pipeline after cutting can be covered by the sealing cylinder.
[0031] Next, external threads that mate with the internal threads of the sealing cylinder are machined on the remaining pipeline end, and the sealing cylinder is then installed on the pipeline end. In this process, the worker first installs the inner sealing ring in the sealing groove of the sealing cylinder, then passes the pipeline end through the through hole between the sealing gland and the sealing cylinder, and rotates the sealing cylinder to mate the internal threads with the external threads of the pipeline end to complete the connection.
[0032] Finally, tighten the end caps and sealing caps at the front and rear ends of the sealing cylinder respectively to complete the installation of the device.
[0033] In this embodiment, maintenance is primarily performed on the T-shaped pipeline of the separator. Since the fault location of the T-shaped pipeline is generally close to the T-joint, it is usually impossible to completely cut the pipeline at the perforation point when cutting the pipeline. In addition to maintaining the T-shaped pipeline, this device can also perform fire-free repairs on perforations and other damage to conventional pipelines. When the pipeline is long enough, the perforation point can be completely cut off, and the device can be installed on the remaining intact pipeline end for sealing repair.
[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A fire-free perforation sealing device for a metering chamber separator, characterized in that, include: A sealing cylinder (2) is provided with a pipe thread (5) on its inner wall, and the inner diameter of the pipe thread (5) matches the outer diameter of the pipe to be repaired. The top of the sealing cylinder (2) is sealed, and the bottom is open. The top of the pipe to be repaired passes through the opening of the sealing cylinder (2) and cooperates with the pipe thread (5). The bottom end of the sealing cylinder (2) is provided with a sealing cap (3), and the sealing cap (3) has a through installation hole in the middle. The pipe to be repaired passes through the installation hole and enters the sealing cylinder (2) to connect with the pipe thread (5).
2. The fire-free perforation sealing device for the metering chamber separator according to claim 1, characterized in that, The sealing cylinder (2) is provided with an end cap (1) at the top. The end cap (1) is detachably connected to the sealing cylinder (2) and seals the top of the sealing cylinder (2).
3. The fire-free perforation sealing device for the metering chamber separator according to claim 2, characterized in that, The end cap (1) is connected to the top of the sealing cylinder (2) by a thread.
4. The fire-free perforation sealing device for the metering chamber separator according to claim 2 or 3, characterized in that, A sealing gasket (4) is provided between the end cap (1) and the top of the sealing cylinder (2).
5. The fire-free perforation sealing device for the metering chamber separator according to claim 1, characterized in that, The inner wall of the bottom end of the sealing cylinder (2) is provided with a plurality of sealing grooves arranged in the circumferential direction, and each sealing groove is provided with an inner sealing ring (6).
6. The fire-free perforation sealing device for the metering chamber separator according to claim 1, characterized in that, An end sealing ring (7) is provided between the bottom end of the sealing cylinder (2) and the sealing cover (3).