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Performance detection device and method for carbon dioxide sealed sand mixing device

A carbon dioxide and detection device technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of large fluctuation of construction displacement, difficult to improve, increase construction uncertainty, etc., to achieve the effect of ensuring continuity and improving accuracy

Pending Publication Date: 2018-10-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Carbon dioxide dry sand fracturing technology is an emerging technology in China, and its core equipment, carbon dioxide closed sand mixing device is also in the process of continuous optimization and improvement. The performance parameters of the newly developed carbon dioxide closed sand mixing device need to be tested before being put into field application Full-scale simulation tests, including sealing performance, maximum sand delivery speed, relationship between sand delivery screw speed and sand ratio under constant displacement, etc. If the carbon dioxide airtight sand mixing device is blindly put into field application, the construction uncertainty will be increased , the accuracy of sand delivery cannot be accurately controlled, and the safety risk increases
[0004] In addition, the sand-carrying fluid has flow friction in the flow of the pipeline, and the size of the flow friction directly affects the phase state of the liquid carbon dioxide. If the flow friction is too large, the liquid carbon dioxide will gasify, and the fracturing vehicle will run out of the pump, which will lead to construction exhaust. The amount fluctuates greatly and is difficult to increase, etc. The research on the friction characteristics of the sand-carrying fluid in the pipeline in the on-site carbon dioxide dry sand fracturing construction is in the theoretical research stage. At present, there is no comprehensive simulation of the on-site construction situation in China. Dimensional testing process

Method used

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  • Performance detection device and method for carbon dioxide sealed sand mixing device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a carbon dioxide airtight sand mixing device performance testing device, which includes a separation tank 9, a carbon dioxide circulation pump group, a friction test unit 35 and a connecting device connected in sequence to form a circuit through pipelines, and the friction test unit 35 The inlet end is connected with the outlet end of the carbon dioxide circulating pump group, and the inlet end and the outlet end of the friction test unit 35 are respectively provided with a pressure sensor one 1 and a pressure sensor two 6;

[0035] The separation tank 9 is communicated with a transfer interface 24 through a pipeline, and a charging recovery unit 36 ​​is provided on the pipeline; the carbon dioxide circulation pump group includes at least two parallel carbon dioxide circulation pumps 17, and the communication device is mixed with the carbon dioxide airtight The sand device 23 is connected, a flowmeter 19 is arranged on the pipeline between the co...

Embodiment 2

[0038] On the basis of Embodiment 1, this embodiment provides a carbon dioxide airtight sand mixing device performance testing device, the friction test unit 35 includes a plurality of test valves 3 and transparent test tubes 4, and a plurality of transparent test tubes 4 are arranged side by side Setting, the test valve 3 and the transparent test tube 4 are communicated with each other through the pipeline and correspond to each other. The transparent test tube 4 can be replaced with different sizes according to requirements, and the sand-carrying condition of the liquid carbon dioxide can be observed in real time through the transparent test tube 4 during the test.

[0039] The filling and recovery unit 36 ​​includes a carbon dioxide transfer pump 29, two filling valves 28, and two recovery valves 27. The two filling valves 28 are connected in series with the two ends of the carbon dioxide transfer pump 29 respectively through pipelines. One end of the recovery valve 27 is c...

Embodiment 3

[0041] On the basis of Embodiment 2, this embodiment provides a carbon dioxide airtight sand mixing device performance testing device, a separation tank inlet valve 8 is provided between the friction test unit 35 and the separation tank 9, and the friction test unit 35 is provided with a separation tank inlet valve 8. An internal circulation main valve 22 is provided between the inlet end of the unit 35 and the outlet end of the carbon dioxide circulation pump group;

[0042] A liquid-phase filling valve 31 and a gas-phase filling valve 32 are arranged between the filling recovery unit 36 ​​and the separation tank 9, and the liquid-phase filling valve 31 and the gas-phase filling valve 32 are arranged side by side. The valve 20 and the main internal circulation valve 22 communicate with the flow meter 19 in parallel.

[0043] like figure 1 As shown, a buffer tank 12 is also included, and the buffer tank 12 is arranged between the separation tank 9 and the carbon dioxide circu...

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Abstract

The invention provides a performance detection device and method for a carbon dioxide sealed sand mixing device. The performance detection device comprises a separation tank, a carbon dioxide circulation pump set, a friction test unit and a communication device that are sequentially connected to form a loop through a pipeline, wherein an inlet end of the friction test unit is communicated with anoutlet end of the carbon dioxide circulation pump set, the inlet end and an outlet end of the friction test unit are respectively provided with a first pressure sensor and a second pressure sensor, the separation tank is communicated with a transfer interface through the pipeline, and the pipeline is provided with a charging and recycling unit. The performance detection device is advantaged in that air tightness of the carbon dioxide sealed sand mixing device can be detected, the fluid friction is measured through utilizing a transparent test tube, the flow of the sand carrying liquid under different pipe diameters is convenient to simulate, moreover, the maximum sand transport speed, the sand transport spiral rotation speed under fixed displacement and calibration of the sand ratio are obtained.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a performance detection device and method of a carbon dioxide closed sand mixing device. Background technique [0002] Carbon dioxide dry sand fracturing technology, as a kind of waterless fracturing technology, has good applicability to low-permeability and low-pressure oil and gas reservoirs. This technology can realize "waterless fracturing", eliminate reservoir and water sensitivity and water lock damage, and improve post-fracturing effect; fracturing fluid has no residue, can protect reservoir and support fractures, and realize autonomous flowback. [0003] Carbon dioxide dry sand fracturing technology is an emerging technology in China, and its core equipment, carbon dioxide closed sand mixing device is also in the process of continuous optimization and improvement. The performance parameters of the newly developed carbon dioxide closed san...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 杨延增聂俊章东哲叶文勇魏小房张岄叶赛王玲段成才武自博
Owner BC P INC CHINA NAT PETROLEUM CORP