Unlock instant, AI-driven research and patent intelligence for your innovation.

A frequency conversion hydraulic fracturing system and its pressure adjustment method

A technology of hydraulic fracturing and pressure adjustment, which is applied in earthwork drilling, wellbore/well components, measurement, etc., and can solve the problems of low efficiency and accuracy of pressure value adjustment

Active Publication Date: 2021-11-19
BEIJING TIANMA INTELLIGENT CONTROL TECH CO LTD +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the hydraulic fracturing scheme in the prior art has low efficiency and accuracy in adjusting the pressure value during the fracturing process, and then provides a frequency conversion hydraulic fracturing system and its pressure adjustment method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A frequency conversion hydraulic fracturing system and its pressure adjustment method
  • A frequency conversion hydraulic fracturing system and its pressure adjustment method
  • A frequency conversion hydraulic fracturing system and its pressure adjustment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides a frequency conversion hydraulic fracturing system, such as figure 1 As shown, it includes a controller 100, a main channel 200 and a bypass channel 300, wherein:

[0047] The main passage 200 includes a variable frequency pumping station 201, an electronically controlled valve 202 and a pressure sensor 203; The port is connected with the first end of the electric control valve 202, the second end of the electric control valve 202 is connected with the constant pressure opener in the borehole, and the controlled end of the electric control valve 202 is connected with the controller The output terminal of 100 is connected; the pressure sensor 203 measures the internal pressure value of the main passage 200 and sends the measurement result to the controller 100 . Since the main passage 200 is actually connected to the sealed space in the borehole and further connected to the rock formation or coal seam fissure, the internal pressure value of the ...

Embodiment 2

[0068] This embodiment provides a pressure regulation method for a variable frequency hydraulic fracturing system, wherein the variable frequency hydraulic fracturing system adopts the scheme shown in Embodiment 1, as shown in image 3 shown, including:

[0069] S101: The pressure adjustment step in the sealing stage, the pressure adjustment step in the sealing stage is used to control the frequency conversion pump station to input liquid into the main passage at the lowest frequency in the sealing stage so that the internal pressure value of the main passage is increased according to the set speed to the expansion threshold of the hole sealer, and then maintain the internal pressure value of the main passage at the expansion threshold within the set time period; wherein, the internal pressure value of the main passage is maintained at the set time period of the expansion threshold If there is no liquid backflow in the overflow passage, it is determined that the sealing stage ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a frequency conversion hydraulic fracturing system and a pressure regulating method thereof. The system includes a controller, a main passage and a bypass passage. In the main channel, the controlled end of the variable frequency pump station is connected to the controller, the liquid outlet of the variable frequency pump station is connected to the first end of the electric control valve, and the second end of the electric control valve is connected to the constant pressure opener in the borehole , the controlled end of the electronically controlled valve is connected to the controller; the pressure sensor measures the internal pressure value of the main passage and sends the measurement result to the controller; in the bypass passage, the first end of the electronically controlled flow valve is connected to the outlet of the variable frequency pump The second end of the electronically controlled flow valve is connected to the liquid tank, and the controlled end of the electronically controlled flow valve is connected to the controller; the controller coordinates and controls the working frequency and electronically controlled flow rate of the variable frequency pump station Valves and electronically controlled valves, so that the internal pressure value of the main passage changes according to the preset range. The above scheme can automatically and accurately control the internal pressure value of the main channel to improve the fracturing efficiency and effect.

Description

technical field [0001] The invention relates to the technical field of mining equipment for fully mechanized mining working faces, in particular to a frequency conversion hydraulic fracturing system and a pressure regulating method thereof. Background technique [0002] In the process of coal mining, the total caving method is usually used to control the goaf roof of the working face. However, most of the goaf roofs in coal mines cannot collapse in time with the advancement of the working face. , large thickness, strong integrity, strong self-supporting ability, etc. In this case, after the coal seam is mined, a large area of ​​the roof is suspended in the goaf, and it will not collapse in a short period of time. Once it collapses, the area and height of the one-time collapse will be very large, resulting in a strong pressure phenomenon. The initial pressing step distance of similar roofs is often large, up to 40-70m, or even hundreds of meters. There are obvious dynamic ph...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B47/06
CPCE21B43/26E21B47/06
Inventor 刘明亮王大龙王伟李然刘波王超李春玉李士鹏
Owner BEIJING TIANMA INTELLIGENT CONTROL TECH CO LTD