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Pressure test control method for fracturing system

A control method and pressure testing technology, which is applied in the testing of machines/structural components, instruments, measuring devices, etc., can solve the problems of high risk of equipment and personnel, and achieve the effects of improving safety, improving the efficiency of pressure testing, and quickly positioning

Active Publication Date: 2021-08-06
中石化四机石油机械有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the condition of low pressure, manual control is usually used for pressure test. Under the condition of high pressure, this scheme is more dangerous to equipment and personnel, and the existing operation scheme is difficult to meet the requirements.
There is no related record in the prior art

Method used

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  • Pressure test control method for fracturing system
  • Pressure test control method for fracturing system
  • Pressure test control method for fracturing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as image 3 Among them, a pressure test control method for a fracturing system, comprising the following steps:

[0044] S1. Close the valve of the discharge pipeline 104 of the fracturing device 1;

[0045] S2. The controller outputs a pulse signal to drive the motor of the fracturing device 1 to rotate to increase the pressure of the discharge pipeline 104, and the pressure sensor of the discharge pipeline 104 outputs a pressure signal; preferably, the pulse signal is a period of preset Set the pulse signal within the time, the duration is 0.1~2 seconds. The pulse signal is used as the command signal of the motor inverter, and the motor inverter controls the rotation of the motor.

[0046] S3. The controller receives the pressure signal and compares it with the preset pressure value. If it reaches the pressure, it maintains the pressure. If it does not, it outputs the same pulse signal again to drive the motor of the fracturing device 1 to rotate, so that the d...

Embodiment 2

[0052] On the basis of embodiment 1, in preferred scheme, also comprise the following steps:

[0053] S5, such as figure 1Among them, the discharge pipeline 104 of each fracturing device 1 is connected to the trunk pipeline 3 through the branch pipeline 2, and the trunk pipeline 3 is connected to the bus pipeline 4, and the branch pipeline 2 is provided with a branch valve 21 and a branch pressure sensor 22. A main line valve 31 and a main line pressure sensor 32 are provided on the main line pipeline 3, and a main line valve 41 and a main line pressure sensor 42 are provided on the main line pipeline 4; preferably, each main line pipeline 3 is connected to the buffer tank 5, The buffer tank 5 is connected with the bus line 4 . Multiple sand tanks are connected to the sand mixing device, and multiple liquid tanks are connected to the sand mixing device, and there are one or more sand mixing devices. The sand mixing device is connected with the inlet management of each fractu...

Embodiment 3

[0069] In another optional solution, a pressure test control method for a fracturing system includes the following steps:

[0070] S01. The discharge pipeline 104 of each fracturing device 1 is connected to the trunk pipeline 3 through the branch pipeline 2, and the trunk pipeline 3 is connected to the bus pipeline 4. The branch pipeline 2 is provided with a branch valve 21 and a branch pressure sensor 22. A trunk valve 31 and a trunk pressure sensor 32 are provided on the trunk pipeline 3, and a bus valve 41 and a bus pressure sensor 42 are provided on the bus pipeline 4;

[0071] Close the bus valve 41, and the main controller sends a signal to make a part of the branch controllers control the output pressure of the fracturing device 1;

[0072] The bus pressure sensor 42 outputs a pressure signal, and the main controller receives the pressure signal and compares it with a preset pressure value;

[0073] S02, regrouping, the main controller gives a signal to make a part of ...

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Abstract

The present invention provides a pressure test control method for a fracturing system, comprising the following steps: S1, closing the valve of the discharge pipeline of the fracturing device; S2, the controller outputs a pulse signal to drive the motor of the fracturing device to rotate to discharge The pressure of the pipeline rises, and the pressure sensor of the discharge pipeline outputs a pressure signal; S3. The controller receives the pressure signal and compares it with the preset pressure value. If it reaches the pressure, it maintains the pressure, and if it does not reach it, it outputs the same pulse again The signal drives the motor of the fracturing device to rotate, so that the pressure of the discharge pipeline increases until it reaches the preset pressure value; the pressure test operation of the fracturing system is realized through the above steps. The invention can greatly improve the safety of the pressure test operation and improve the pressure test efficiency.

Description

technical field [0001] The invention relates to the field of oil drilling equipment, in particular to a pressure test control method for a fracturing system. Background technique [0002] Fracturing is a major measure to increase and stabilize production in the exploration and development of oil and gas fields. Multiple high-power fracturing equipment is used to form a fracturing system, such as figure 1 As shown in , the reservoir rock is fractured and diversion channels are created. With the development of ultra-deep well and horizontal well technology, the power of the required fracturing unit is increasing, and the weight and volume of a single fracturing equipment are also increasing. For example, the output pressure of the existing equipment reaches 175Mpa. Due to the high pressure, it is necessary to perform a pressure test on the equipment before each shutdown and put into use to ensure that the equipment is in good working condition. Under low pressure conditions,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00
CPCG01M99/005
Inventor 王庆群彭平生王云海李莉莉肖勇石权刘灼范杰陆英娜赵萍
Owner 中石化四机石油机械有限公司
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