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Low softening point emulsified asphalt for drilling fluid, and preparation method thereof

A low softening point, emulsified asphalt technology, applied in chemical instruments and methods, drilling compositions, building components, etc., can solve problems such as hole wall instability, improve hole wall stability, save resources, and prepare methods simple effect

Inactive Publication Date: 2013-08-28
BEIJING INST OF EXPLORATION ENG
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  • Description
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Problems solved by technology

[0006] In order to solve the problem of hole wall instability caused by loose and broken formations, the invention provides a low softening point emulsified bitumen for drilling fluid prepared from oil slurry and its preparation method

Method used

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  • Low softening point emulsified asphalt for drilling fluid, and preparation method thereof

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with specific examples, so that those skilled in the art can better understand the present invention and implement it, but the given examples are not intended to limit the present invention.

[0032] Add solvent oil and nonionic surfactant into the oil slurry, heat and stir evenly to obtain the oil slurry mixture; then add water, C 2 ~C 4 Add alcohol and cationic surfactant into the reactor, heat and stir until the cationic surfactant is fully dissolved, then add the oil slurry mixture into the reactor, at a temperature of 45~90°C and a stirring rate of 200~1000rpm, Stir and react for 30-60 minutes to obtain low softening point emulsified asphalt.

[0033] raw material Example 1 Example 2 Example 3 Example 4 Example 5 oil slurry 25 copies 35 copies 30 copies 45 copies 50 copies Solvent oil 35 parts white oil 28 parts of white oil 26 parts of white oil Die...

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Abstract

The invention discloses a low softening point emulsified asphalt for a drilling fluid, and a preparation method thereof. The emulsified asphalt comprises, by weight, 25-50 parts of an oil slurry, 10-35 parts of a solvent oil, 1-4 parts of a non-ionic surfactant, 1-4 parts of a cation surfactant, 0-4 parts of a C2-C4 alcohol, and 30-40 parts of water. The preparation method comprises: adding a solvent oil and a non-ionic surfactant to an oil slurry, carrying out heating and uniform stirring to obtain an oil slurry mixing liquid, carrying out mixing heating stirring on water, a C2-C4 alcohol and a cation surfactant until the cation surfactant is dissolved, adding the oil slurry mixing liquid, and stirring at a temperature of 45-90 DEG C to obtain the low softening point emulsified asphalt. The emulsified asphalt has the following characteristics that: the emulsified asphalt is easily dispersed in water, and has characteristics of low softening point, good anti-sloughing effect and good lubricating performance; with the emulsified asphalt, the broken stratum can be well cemented at a low temperature, hole wall cracks can be plugged, and hole wall stability can be increased; and the emulsified asphalt can be widely used in geological drilling, petroleum and natural gas well drilling, geoheat drilling and the like, oil slurry recycling is achieved, and process cost is reduced.

Description

technical field [0001] The invention relates to a low softening point emulsified asphalt prepared from oil slurry used in the field of geological drilling and a preparation method thereof. Background technique [0002] With the deepening of geological prospecting drilling and scientific drilling, the drilling depth continues to deepen, the formations encountered are becoming more and more complex, and more and more problems are encountered in construction, which has a significant impact on the construction progress and construction cost. influences. The instability of the hole wall in complex formations is one of the construction problems that need to be solved urgently. [0003] Unstable formations include strong water-sensitive formations, loose and broken formations, salt-gypsum formations, abnormal pressure formations, etc. Among them, loose and broken formations have extremely weak hole walls, poor cementation, and are easy to collapse and fall off. Such formations are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L91/00C08J3/03C09K8/035
Inventor 熊正强陶士先付帆李晓东纪卫军单文军李艳宁
Owner BEIJING INST OF EXPLORATION ENG
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