High-pressure erosion gas constant-speed sand adding device

Abstract

A high-pressure erosion gas constant-speed sand adding device comprises a sand adding unit, a high-pressure erosion upstream gas flowing pipeline and a high-pressure erosion downstream gas flowing pipeline, and a sand adding device of the sand adding unit is arranged on a sand storage tank of the sand adding unit. And the sand adding device is communicated with a pipeline position where the high-pressure erosion upstream gas flow pipeline is connected with the high-pressure erosion downstream gas flow pipeline. And control valves are arranged between the sand adding device and the high-pressure erosion upstream gas flow pipeline and between the sand adding device and the high-pressure erosion downstream gas flow pipeline. The bottom of the sand storage tank is of a conical structure, and a discharging opening is formed in the center of the conical structure of the bottom of the sand storage tank and communicated with the sand adding device. The high-pressure erosion gas constant-speed sand adding device has the beneficial effects that the problem of uniform sand adding of high-pressure erosion gas is effectively solved, a long-time sand-carrying erosion test can be realized through alternate work of the double sand adding devices, the erosion gas constant-speed sand adding device with higher pressure bearing can be processed on the basis of the scheme, and the sand adding device is simple in structure and convenient to operate. The method is suitable for popularization and use.

Description

Technical Field

[0001] The invention relates to the technical field of experimental research on erosion and wear of oil and gas field pipes, and more specifically to a high-pressure erosion gas uniform-speed sand feeder. Background Art

[0002] At present, it is a common phenomenon for production fluids to carry solid particles during the development of oil and gas fields. The commonly used mechanical sand control methods at this stage can only prevent large particles from entering the wellbore. Erosion and wear are still one of the main forms of equipment failure. Various types of downhole tool joints, elbows, Christmas trees, nozzles, and ground manifolds have many failures caused by erosion and wear. High-speed fluids carrying solid particles will cause a significant decrease in the carrying capacity of the equipment. What's worse, it will cause perforation of the pipe wall, causing serious safety hazards in production.

[0003] The analysis and research of erosion wear has been continuously improved in recent years. However, the high-pressure gas sand erosion test faces a difficulty, that is, how to achieve uniform sand addition to the high-pressure erosion gas. In the face of this problem, it is urgent to design a device that can uniformly add sand to the flowing high-pressure erosion gas to achieve high-pressure gas sand erosion. Summary of the invention

[0004] The invention overcomes the shortcomings of the prior art and provides a high-pressure erosion gas uniform-speed sand feeder.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] A high-pressure erosion gas uniform-speed sand feeder comprises: a sand feeding unit, a high-pressure erosion upstream gas flow pipeline and a high-pressure erosion downstream gas flow pipeline. A sand feeding device of the sand feeding unit is arranged on a sand storage tank of the sand feeding unit, and the sand feeding device is connected to the pipeline position connecting the high-pressure erosion upstream gas flow pipeline and the high-pressure erosion downstream gas flow pipeline.

[0007] Control valves are arranged between the sand-adding device and the high-pressure erosion upstream gas flow pipeline and the high-pressure erosion downstream gas flow pipeline.

[0008] The bottom of the sand storage tank is a conical structure. A feeding port is arranged at the center of the conical structure at the bottom of the sand storage tank. The feeding port is connected with the sand adding device.

[0009] The sand adding device includes a shell, a driving motor and a sand adding paddle. A sand adding passage is arranged inside the shell, and the sand adding passage is connected with a sand storage tank, a high-pressure erosion upstream gas flow pipeline and a high-pressure erosion downstream gas flow pipeline. A driving motor is arranged on the shell, and a sand adding paddle is arranged on the driving shaft of the driving motor. The sand adding paddle is arranged in the sand adding passage.

[0010] There are two sand adding units, and the sand storage tanks of the two sand adding units are arranged in parallel.

[0011] The beneficial effects of the present invention are:

[0012] This solution effectively solves the problem of uniform sand addition of high-pressure erosion gas. Through the alternating operation of the double sand adding devices, long-term sand-carrying erosion test can be realized. On the basis of this solution, a uniform-speed sand adding device for erosion gas with higher pressure can be processed. The sand adding device in this device has a simple structure and is easy to operate, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 It is a schematic diagram of the layout of the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of the Gaza unit.

[0016] In the figure: 1. sand storage tank; 11. discharge port; 2. sand adding device; 21. shell; 22. drive motor; 23. sand adding paddle; 3. high pressure erosion upstream gas flow pipeline; 4. high pressure erosion downstream gas flow pipeline; 5. control valve. DETAILED DESCRIPTION

[0017] Example

[0018] A high-pressure erosion gas uniform-speed sand feeder comprises: a sand feeding unit, a high-pressure erosion upstream gas flow pipeline 3 and a high-pressure erosion downstream gas flow pipeline 4. A sand feeding device 2 of the sand feeding unit is provided on a sand storage tank 1 of the sand feeding unit, and the sand feeding device 2 is connected to the pipeline position connecting the high-pressure erosion upstream gas flow pipeline 3 and the high-pressure erosion downstream gas flow pipeline 4.

[0019] Control valves 5 are provided between the sand adding device 2 and the high-pressure erosion upstream gas flow pipeline 3 and the high-pressure erosion downstream gas flow pipeline 4 .

[0020] The bottom of the sand storage tank 1 is a conical structure. A feeding port 11 is provided at the center of the conical structure at the bottom of the sand storage tank 1 . The feeding port 11 is connected to the sand adding device 2 .

[0021] The sand adding device 2 includes a shell 21, a driving motor 22 and a sand adding paddle 23. A sand adding passage is provided inside the shell 21, and the sand adding passage is connected to the sand storage tank 1, the high-pressure erosion upstream gas flow pipeline 3 and the high-pressure erosion downstream gas flow pipeline 4. A driving motor 22 is provided on the shell 21, and a sand adding paddle 23 is provided on the driving shaft of the driving motor 22. The sand adding paddle 23 is arranged in the sand adding passage.

[0022] The working principle of the present invention is as follows: Figure 1-3As shown, the device is used to simulate the erosion environment to produce sand. The sand storage tank 1 is connected to the upper and lower ports of the gas flow pipeline of the erosion simulation equipment through the sand adding device 2. The discharge port 11 is connected to the high-pressure erosion upstream gas flow pipeline 3 and the high-pressure erosion downstream gas flow pipeline 4 through the sand adding pipe passage. The driving motor 22 of the sand adding device 2 drives the sand adding paddle 23 to rotate to add sand. The sand adding device 2 controls the connection and closing with the high-pressure erosion upstream gas flow pipeline 3 and the high-pressure erosion downstream gas flow pipeline 4 through the control valve 5.

[0023] Preferably, in this embodiment, the volume of the sand storage tank 1 is 10L and can withstand a pressure of 20MPa. The design pressure of the erosion gas uniform sand adding device is 7MPa, that is, to ensure that the erosion test can achieve uniform sand adding when the simulated reservoir gas pressure is 7MPa.

[0024] In the prior art, there is currently no reference case for the problem of uniform speed sand addition of high-pressure erosion gas. The high-pressure erosion gas uniform speed sand feeder disclosed in the present invention achieves pressure balance within the process through the above-mentioned sand adding structure. Practical application shows that the high-pressure erosion gas uniform speed sand feeder can achieve uniform speed sand addition of erosion gas within 20MPa at most.

[0025] Further, the number of the sand adding units is two, and the sand storage tanks 1 of the two sand adding units are arranged in parallel. The alternating action of the two sand adding units can effectively realize the long-term sand carrying erosion test.

[0026] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A high-pressure erosion gas uniform speed sand feeder, characterized in that: include: A sand-gauging unit, a high-pressure erosion upstream gas flow pipeline and a high-pressure erosion downstream gas flow pipeline. A sand-gauging device of the sand-gauging unit is arranged on the sand storage tank of the sand-gauging unit. The sand-gauging device is connected to the pipeline position connecting the high-pressure erosion upstream gas flow pipeline and the high-pressure erosion downstream gas flow pipeline.

2. A high-pressure erosion gas uniform-speed sand feeder according to claim 1, characterized in that: Control valves are provided between the sand adding device and the high-pressure erosion upstream gas flow pipeline and the high-pressure erosion downstream gas flow pipeline.

3. A high-pressure erosion gas uniform-speed sand feeder according to claim 1, characterized in that: The bottom of the sand storage tank is a conical structure, and a feeding port is arranged at the center of the conical structure at the bottom of the sand storage tank, and the feeding port is connected with the sand adding device.

4. A high-pressure erosion gas uniform-speed sand feeder according to claim 1, characterized in that: The sand adding device comprises a shell, a driving motor and a sand adding paddle. A sand adding passage is arranged inside the shell, and the sand adding passage is connected with the sand storage tank, the high-pressure erosion upstream gas flow pipeline and the high-pressure erosion downstream gas flow pipeline. The shell is provided with a driving motor, and a sand adding paddle is arranged on the driving shaft of the driving motor. The sand adding paddle is arranged in the sand adding passage.

5. A high pressure erosion gas uniform speed sand feeder according to any one of claims 1 to 4, characterized in that: The number of the sand adding units is two, and the sand storage tanks of the two sand adding units are arranged in parallel.

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