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Low softening point emulsified bitumen 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: 2016-03-09
BEIJING INST OF EXPLORATION ENG
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  • Abstract
  • Description
  • Claims
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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 bitumen 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] Table 1 Preparation of emulsified asphalt with different component additions and reaction conditions

[0034] raw material Example 1 Example 2 Example 3 Example 4 Example 5 oil slurry 25 copies 35 copies 30 copies 45...

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Abstract

The invention discloses a low softening point emulsified asphalt for drilling fluid and a preparation method thereof. The emulsified asphalt contains by weight: 25-50 parts of oil slurry, 10-35 parts of solvent oil, and 1-4 parts of nonionic surfactant , 1~4 parts of cationic surfactant, 0~4 parts of C2~C4 alcohol and 30~40 parts of water. Its preparation method is to add solvent oil and nonionic surfactant into the oil slurry, heat and stir to obtain the oil slurry mixture; then mix water, C2~C4 alcohol and cationic surfactant, heat and stir until the cationic surfactant is dissolved, and then Add oil slurry mixture and stir at 45-90°C to obtain low softening point emulsified asphalt. The emulsified asphalt of the present invention is easy to disperse in water, has a low softening point, has good anti-slump effect and lubricating performance, can better cement broken strata at low temperature, seal hole wall cracks, and improve hole wall stability, and is widely applicable to Geological drilling, oil and gas well drilling and geothermal drilling, etc., and realize the recycling of oil slurry and reduce process costs.

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. Influence. 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 Patents(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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