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Foam generating device for oil drilling and cementing operation and foaming method thereof

A foam generating device and a technology for oil drilling and production are applied in the field of foam generating devices for oil drilling, production and cementing operations, and can solve the problems of unstable density of foamed cement slurry and uneven distribution of air bubbles, so as to improve the uniformity of the medium and the simple structure. , the effect of stable density

Pending Publication Date: 2020-11-06
中石化四机石油机械有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a foam generating device and foaming method for oil drilling and cementing operations, so as to solve the problems of unstable foam cement slurry density and uneven distribution of bubbles during foam cementing operations

Method used

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  • Foam generating device for oil drilling and cementing operation and foaming method thereof
  • Foam generating device for oil drilling and cementing operation and foaming method thereof
  • Foam generating device for oil drilling and cementing operation and foaming method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as Figure 1~6 As shown, a foam generating device for oil drilling and cementing operations, the liquid outlet of the primary mixer 1 is connected to the liquid inlet of the secondary mixer 2, and the liquid inlet of the primary mixer 1 is connected to the pump body of the cementing vehicle 16 The primary mixer 1 communicates with the liquid adding device 17, the liquid inlet of the secondary mixer 2 communicates with the nitrogen generating device 18, and both the primary mixer 1 and the secondary mixer 2 are equipped with a homomixer. With this structure, the homomixer plays the role of further shearing and mixing the mixed liquid, greatly prolonging the mixing time, ensuring more uniform mixing and more stable density of the mixed liquid.

[0041]In the preferred solution, the structure of the primary mixer 1 is as follows: the first mixing chamber 4 communicates with the first diffuser 6, the first diffuser 6 communicates with the elbow 8, the elbow 8 communica...

Embodiment 2

[0053] Further illustrate in conjunction with embodiment 1, as Figure 1~6 As shown, the pump body of the cementing vehicle 16 communicates with the first mixing chamber 4 of the electric valve 20 through the flow meter 19, and the high-pressure cement-based slurry discharged from the cementing vehicle 16 is discharged from the first nozzle 3 in the first mixing chamber 4 when the electric valve 20 is opened. Injected to form a high-pressure jet, forming a negative pressure inside the first nozzle 3 .

[0054] The liquid adding device 17 opens the electric valve 20, and under the action of negative pressure, the pumped liquid additive is sucked into the first mixing chamber 4 from the additive inlet 5 of the first mixing chamber 4, and then injected into the first mixing chamber 4. The high-pressure cement-based slurry shears at high speed and plays a mixing role.

[0055] The mixture of cement-based slurry and liquid additives passes through the first diffuser 6 with an ever...

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Abstract

The invention provides a foam generating device for oil drilling and cementing operation and a foaming method thereof. A liquid outlet of a primary mixer is communicated with a liquid inlet of a secondary mixer; a liquid inlet of the primary mixer is communicated with a well cementation vehicle pump body; the primary mixer is communicated with a liquid adding device; a liquid inlet of a secondarymixer is communicated with a nitrogen generating device; uniform mixers are arranged on the primary mixer and the secondary mixer; the structure of the primary mixer is as follows: the primary mixer has the following structure: the first mixing cavity is communicated with a first diffusion pipe; a first diffusion pipe is communicated through a bent pipe, the bent pipe is communicated with a firstuniform mixer, the first uniform mixer is communicated with the secondary mixer, and solid, liquid and gas flow phase media are mixed by adopting a venturi jet mixing principle, a turbulent flow mixing principle and a shear mixing principle to form foamed cement slurry which is stable in density and uniform in mixing.

Description

technical field [0001] The invention relates to the field of oil drilling and cementing operation equipment, in particular to a foam generating device and a foaming method for oil drilling and cementing operations suitable for low-density well cementing operations. Background technique [0002] With the continuous increase of shale gas development, the current cementing operation presents the characteristics of long horizontal section and inclined well section, and problems such as casing eccentricity and low pressure leakage are becoming more and more prominent. Higher requirements. Foam cement slurry cementing technology can realize the preparation of low-density cement slurry, improve lost circulation in easily lost formations, reduce casing eccentricity and other problems, and has been popularized and applied abroad. [0003] The foam cement slurry cementing systems of Halliburton, BJ and other companies represent the advanced level of foam cementing. The supporting ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F5/04B01F3/04
CPCB01F23/235B01F25/3121B01F25/314
Inventor 吕文伟常占宪龙新平李哲王军锋王晓川王涛唐少波王丽高亚宁张也
Owner 中石化四机石油机械有限公司