Simulation experiment device for high-temperature and high-pressure underground cutting jam releasing operation

Abstract

The utility model provides the simulation experiment device for the high-temperature and high-pressure underground cutting jam-releasing operation, which can simulate the high-temperature and high-pressure underground cutting jam-releasing operation by using a cutting torch, so that powerful technical support can be provided for research, development and optimization of a cutting jam-releasing tool. The main structure of the device comprises a box body used for accommodating an environment simulation medium, a heating element, a pressurizing device and a tubular column fixing mechanism are installed in the box body, the tubular column fixing mechanism is used for fixing a tubular column to be cut, a cutting torch is further fixed in the box body through a cutting torch fixing mechanism, and one end of the cutting torch extends out of the box body and is in sealed connection with the box body. The other end of the cutting torch extends into or penetrates through the pipe column to be cut, and a nozzle of the cutting torch is located in the pipe column to be cut.

Description

TECHNICAL FIELD

[0001] The utility model relates to cutting simulation experiment technical field, concretely is a kind of simulation experiment device of high temperature high pressure downhole cutting declogging operation. BACKGROUND

[0002] In the process of oil exploitation, especially in the operating environment of deep well and ultra-deep well, downhole tools face extremely complex and harsh conditions. High temperature high pressure downhole cutting declogging operation is one of the key links to ensure normal production of oil and gas wells. One of the cutting declogging methods is to extend the cutting torch disclosed in the patent with publication number CN29337056U into the corresponding pipeline and cut the pipeline by spraying high-temperature plasma jet from the end of the cutting torch.

[0003] Currently, in the process of tool development and optimization of high temperature high pressure downhole cutting declogging operation, although there is a cutting experiment platform for simulating cutting operation as disclosed in the patent application with publication number CN116618744A, there is still a lack of simulation experiment device for high temperature high pressure downhole cutting declogging operation using cutting torch, which leads to prolonged research and development cycle, increased cost, and thus safety hazards and economic losses. Therefore, an experimental device capable of simulating downhole high temperature high pressure environment is needed to provide strong technical support for the research and development and optimization of cutting declogging tools and promote the efficient and safe development of oil and gas exploitation and other industries. UTILITY MODEL CONTENT

[0004] In view of the need to simulate high temperature high pressure downhole cutting declogging operation using cutting torch, the utility model provides a simulation experiment device for high temperature high pressure downhole cutting declogging operation to solve the above problems.

[0005] The technical scheme is as follows: a simulation experiment device for high temperature high pressure downhole cutting declogging operation, comprising a box body for containing environmental simulation medium, a heating element, a pressurizing device and a pipe column fixing mechanism are installed in the box body, the pipe column fixing mechanism is used to fix the pipe column to be cut, characterized in that: a cutting torch is also fixed in the box body through a cutting torch fixing mechanism, one end of the cutting torch extends out of the box body and is sealingly connected with the box body, the other end of the cutting torch extends into or penetrates through the pipe column to be cut and makes the nozzle of the cutting torch located in the pipe column to be cut.

[0006] Further, the pipe column fixing mechanism comprises a pipe column clamp one, the pipe column clamp one is a hollow structure and one end thereof is connected with the bottom of the box body, the other end thereof extends upward and is connected with a locking screw one, the end of the pipe column to be cut is placed into the pipe column clamp one, the locking screw one is threadedly connected with the pipe column clamp one and abuts against the pipe column to be cut after penetrating through the pipe column clamp one.

[0007] Further, the pipe column clamp one is internally provided with a stepped surface for bearing the end of the pipe column to be cut, and a gap is formed between the inner wall of the pipe column clamp one and the outer wall of the pipe column to be cut.

[0008] Further, the cutting torch bottom end extends into the pipe column clamp one, the pipe column clamp one is provided with a pressure relief hole, the pressure relief hole penetrates the pipe column clamp one and connects the inner cavity of the pipe column clamp one with the inner cavity of the box.

[0009] Further, the pipe column fixing mechanism comprises a pipe column clamp two, the pipe column clamp two is sleeved on the circumferential part of the pipe column to be cut, a locking screw two is threadedly connected with the pipe column clamp two and abuts against the pipe column to be cut after penetrating the pipe column clamp two, and the circumferential part of the pipe column clamp two is provided with at least three support frames one connected with the inner wall of the box.

[0010] Further, the cutting torch fixing mechanism comprises a cutting torch clamp, the cutting torch clamp is sleeved on the middle part of the cutting torch, a locking screw three is threadedly connected with the cutting torch clamp and abuts against the cutting torch after penetrating the cutting torch clamp, and the circumferential part of the cutting torch clamp is provided with at least three support frames two connected with the inner wall of the box.

[0011] Further, the box comprises a box body and a box cover, the box body and the box cover are threadedly connected and are provided with a sealing ring therebetween.

[0012] Further, the top of the box cover is provided with a mounting boss, a sealing cover is fixedly connected with the mounting boss, the cutting torch is arranged through the mounting boss and the sealing cover, a sealing ring is arranged between the sealing cover and the mounting boss, and a sealing ring is arranged between the sealing cover and the cutting torch.

[0013] Further, the box is provided with a pressure gauge and a thermometer, and the heating element is an annular heating disc arranged at the bottom of the box.

[0014] Main beneficial effects: the scheme can simulate the high-temperature and high-pressure downhole environment by heating the box through the heating element, pressurizing the box through the pressurizing device and injecting the environmental simulation medium into the box, and can also fix the pipe to be cut and the cutting torch through the fixing mechanism respectively and coaxially arrange the pipe to be cut and the cutting torch. When the high-temperature and high-pressure downhole cutting and unblocking operation needs to be simulated, the cutting torch can be ignited and started by inputting current to cut and experiment on the pipe to be cut, thereby providing strong technical support for the research and optimization of the cutting and unblocking tool. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is an internal structural schematic diagram of the utility model;

[0017] Figure 3 This is an enlarged schematic diagram of the section of the tubing to be cut. Detailed Implementation

[0018] like Figures 1-3 The device shown is a simulation experimental apparatus for high-temperature and high-pressure downhole cutting and unblocking operations. It includes a sealed box for containing an environmental simulation medium, which can be a mixture of mud and water or drilling fluid. The box includes a body 6 and a cover 4. A heating element 10, a pressurizing device 8, and a tubing fixing mechanism are installed inside the box. A stirring device can also be installed inside the box to ensure uniform temperature. The box is also equipped with a pressure gauge 3 (preferably a shock-resistant pressure gauge) and a thermometer 5 (e.g., a thermocouple). The heating element 10 can be an annular heating plate located at the bottom of the box. The tubing fixing mechanism is used to fix the tubing 11 to be cut. A cutting torch 12 is also fixed inside the box by a cutting torch fixing mechanism. One end of the cutting torch 12 extends out of the box to form an extension section 1 for ignition. The cutting torch 12 is sealed to the box. The other end of the cutting torch 12 extends into or through the tubing 11 to be cut, with the nozzle of the cutting torch 12 located inside the tubing 11 to be cut.

[0019] Specifically, the pipe column fixing mechanism includes a pipe column clamp 13. The pipe column clamp 13 is a hollow structure with one end connected to the bottom of the box and the other end extending upward and connected to a locking screw 14. The end of the pipe column 11 to be cut is placed inside the pipe column clamp 13. The locking screw 14 is threadedly connected to the pipe column clamp 13 and passes through the pipe column clamp 13 to abut against the pipe column 11 to be cut. The locking screw 14 can be evenly arranged along the circumference of the pipe column clamp 13. At the same time, the screw in this solution can be replaced by bolts or other components to ensure that the pipe column 11 to be cut remains centered. To ensure the stable installation of the pipe string 11 to be cut, the pipe string clamp 13 has a stepped surface inside to support the end of the pipe string 11. There is a certain gap between the inner wall of the pipe string clamp 13 and the outer wall of the pipe string 11. By setting the gap, it can prevent the cutting torch 12 from continuing to cut the pipe string clamp 13 after cutting through the pipe string 11, thus ensuring the continuous use of the pipe string clamp 13. In addition, the bottom end of the cutting torch 12 extends into the pipe string clamp 13. The pipe string clamp 13 is provided with a pressure relief hole 15. The pressure relief hole 15 penetrates the pipe string clamp 13 and connects the inner cavity of the pipe string clamp 13 with the inner cavity of the box. Since the pressure inside the pipe string clamp 13 will increase when cutting begins, the pressure relief hole 15 can relieve the pressure generated.

[0020] In order to fix the pipe to be cut 11 or further fix the pipe to be cut 11 based on the pipe clamp one 13, the pipe fixing mechanism can include a pipe clamp two 16 sleeved on the peripheral part of the pipe to be cut 11, a locking screw two 17 threadedly connected with the pipe clamp two 16 and abutting against the pipe to be cut 11 after passing through the pipe clamp two 16, and the locking screw two 17 can also be provided in multiple numbers around the periphery to center the pipe to be cut 11, and the peripheral part of the pipe clamp two 16 is provided with at least three support frames one 18 connected with the inner wall of the box body to ensure the stability of the pipe clamp two 16.

[0021] Similar to the structure of the pipe clamp one 13, in combination with Figure 2 The cutting torch fixing mechanism includes a cutting torch clamp 19 sleeved on the middle part of the cutting torch 12, a locking screw three 20 threadedly connected with the cutting torch clamp 19 and abutting against the cutting torch 12 after passing through the cutting torch clamp 19, and the locking screw three 20 can be provided in multiple numbers to ensure the cutting torch 12 to be centrally arranged, preferably coaxially arranged with the pipe to be cut 11, and the peripheral part of the cutting torch clamp 19 is provided with at least three support frames two 9 connected with the inner wall of the box body.

[0022] In addition, in order to ensure the sealing, in combination with Figure 2 The box body 6 and the box cover 4 are threadedly connected and provided with a sealing ring 7 therebetween. The box cover 4 is provided with a mounting boss 21 fixedly connected with a sealing cover 2, the cutting torch 12 passes through the mounting boss 21 and the sealing cover 2, the sealing cover 2 and the mounting boss 21 are provided with a sealing ring 7 therebetween, and the sealing cover 2 and the cutting torch 12 are provided with a sealing ring 7 therebetween.

[0023] The specific installation steps of the above structure are as follows: (1) placing the pipe to be cut 11 inside the sealing box, and fixing it coaxially at the central position of the bottom of the sealing box through the pipe fixing mechanism. During the installation process, ensure that the pipe to be cut 11 is aligned with the fixed pipe at the bottom of the sealing box.

[0024] (2) fixing the cutting torch 12 in the sealing box through the cutting torch fixing mechanism. During the connection process, first preliminarily align the cutting torch base with the pipe clamp one 13, and then fasten it with the locking screw three 20. Adjust the screw to make the cutting torch 12 firmly installed and not to shake or displace during cutting.

[0025] (3) placing a thermometer 5 such as a thermocouple monitoring assembly on the side of the sealing box, and placing a pressure gauge 3 such as a flange shockproof pressure gauge on the box cover 4. When placing, ensure that the thermocouple does not contact the sealing box wall and other elements, so as to accurately measure the temperature inside the sealing box. After the thermocouple is installed, connect the signal transmission line thereof to the temperature control system, calibrate and debug to ensure accurate temperature measurement.

[0026] (4) At each connection of the sealing box cover 4, thermocouple detection assembly, pressure gauge 3, etc., install a sealing ring 7 such as a rubber ring. When installing, ensure that the sealing ring 7 is placed in the correct position, the sealing surface is tightly fitted, and there is no distortion or damage phenomenon, so as to ensure the sealing performance of the device in a high temperature and high pressure environment.

[0027] (5) Inject liquid medium into the sealing box and pressurize it through the pressurizing device 8 such as a high-pressure hydraulic pump, check the sealing performance of the device, and observe whether there is leakage at each sealing position. If there is leakage, find out the reason in time and handle it. During the pressure test, the measurement accuracy of the pressure gauge 3 is also checked to ensure that the pressure display is consistent with the actual pressure.

[0028] (6) After installation, start the heating element 10 to make the inside of the sealing box reach the predetermined temperature and pressure conditions, use the ignition device to ignite and start the cutting torch 12, apply current to the ignition wire, ignite the ignition powder, at this time the charge column starts to burn, after reaching the burning pressure, the cutting torch 12 sliding sleeve starts to slide, and the high-temperature plasma hot flow is sprayed from the nozzle to start cutting the pipeline. After the charge column is burned out, the cutting is completed, thereby completing the simulation experiment of high-temperature and high-pressure downhole cutting and releasing operation, and then waiting for the temperature to decrease, recovering the liquid medium, taking out the cutting torch and the cut pipeline, and completing the simulation experiment of high-temperature and high-pressure downhole cutting and releasing operation.

[0029] The above-mentioned content of the present scheme has the following advantages:

[0030] (1) Since the to-be-cut pipe column 11 is fixed by the locking screw, there is a certain gap between the to-be-cut pipe column and the clamp, without the need for large-scale modification of the device due to different specifications of the to-be-cut pipeline, which improves the universality and use efficiency of the device, ensures the pipeline installation precision, and reduces experimental errors.

[0031] (2) The cutting torch 12 is fixed by the cutting torch fixing mechanism, and the unique three-way design of the mechanism greatly enhances the stability of the connection.

[0032] (3) The sealing ring 7 is installed at each connection of the sealing box cover 4, thermocouple detection assembly, pressure gauge 3, etc., to prevent leakage during the experiment and ensure the sealing performance.

[0033] (4) Inject liquid medium into the box body and simulate the downhole environment through the heating element 10 and the pressurizing device 8, which can simulate a high-temperature and high-pressure environment of 260 degrees Celsius and 200 MPa, and can strictly check the sealing performance of the device and the measurement accuracy of the pressure gauge after injection.

[0034] (5) By using a shock-resistant pressure gauge with excellent anti-vibration performance and high-precision measurement capability, it can work stably in a high-temperature and high-pressure environment, and avoid the interference of vibration generated by cutting on the experimental results during the experiment.

[0035] The above merely is a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A simulation experimental device for high-temperature and high-pressure downhole cutting and unsticking operations, comprising a box for containing a simulated environmental medium, wherein a heating element, a pressurizing device, and a tubing string fixing mechanism are installed inside the box, the tubing string fixing mechanism being used to fix the tubing string to be cut, characterized in that: The box also contains a cutting torch fixed by a cutting torch fixing mechanism. One end of the cutting torch extends out of the box and is sealed to the box. The other end of the cutting torch extends into or through the column to be cut and the nozzle of the cutting torch is located inside the column to be cut.

2. The simulation experimental device for high-temperature and high-pressure downhole cutting and unblocking operations according to claim 1, characterized in that: The pipe column fixing mechanism includes a pipe column clamp, which is a hollow structure with one end connected to the bottom of the box and the other end extending upward and connected to a locking screw. The end of the pipe column to be cut is placed inside the pipe column clamp. The locking screw is threaded to the pipe column clamp and passes through the pipe column clamp to abut against the pipe column to be cut.

3. The simulation experimental device for high-temperature and high-pressure downhole cutting and unblocking operations according to claim 2, characterized in that: The pipe clamp has a stepped surface inside for supporting the end of the pipe to be cut, and there is a certain gap between the inner wall of the pipe clamp and the outer wall of the pipe to be cut.

4. A simulation experimental device for high-temperature and high-pressure downhole cutting and unblocking operations according to claim 2 or 3, characterized in that: The bottom end of the cutting torch extends into the first tube clamp. The first tube clamp is provided with a pressure relief hole, which penetrates the first tube clamp and connects the inner cavity of the first tube clamp with the inner cavity of the box.

5. A simulation experimental device for high-temperature and high-pressure downhole cutting and unblocking operations according to claim 1 or 2, characterized in that: The pipe column fixing mechanism includes a pipe column clamp two, which is sleeved on the periphery of the pipe column to be cut. A locking screw two is threadedly connected to the pipe column clamp two and passes through the pipe column clamp two to abut against the pipe column to be cut. The periphery of the pipe column clamp two is provided with at least three support frames one that are connected to the inner wall of the box.

6. The simulation experimental device for high-temperature and high-pressure downhole cutting and unblocking operations according to claim 1, characterized in that: The cutting torch fixing mechanism includes a cutting torch clamp, which is sleeved on the middle of the cutting torch. A locking screw three is threadedly connected to the cutting torch clamp and passes through the cutting torch clamp to abut against the cutting torch. At least three support frames two are provided around the periphery of the cutting torch clamp and are connected to the inner wall of the box.

7. The simulation experimental device for high-temperature and high-pressure downhole cutting and unblocking operations according to claim 1, characterized in that: The enclosure includes a body and a lid, the body and the lid are threaded together and a sealing ring is provided between them.

8. The simulation experimental device for high-temperature and high-pressure downhole cutting and unblocking operations according to claim 7, characterized in that: The top of the box cover is provided with a mounting boss, and a sealing cover is fixedly connected to the mounting boss. The cutting torch is set through the mounting boss and the sealing cover. A sealing ring is provided between the sealing cover and the mounting boss, and a sealing ring is provided between the sealing cover and the cutting torch.

9. The simulation experimental device for high-temperature and high-pressure downhole cutting and unblocking operations according to claim 1, characterized in that: The chamber is equipped with a pressure gauge and a thermometer, and the heating element is an annular heating plate located at the bottom of the chamber.

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