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Emulsifier for oil-based drilling fluid

An oil-based drilling fluid and emulsifier technology, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor anti-fouling performance of emulsifiers, inability of emulsifiers to work, and reduced efficacy of emulsifiers.

Inactive Publication Date: 2020-10-27
ANHUI LUHAI PETROLEUM AUX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the use of the existing emulsifiers for oil-based drilling fluids, the emulsifier cannot function due to the high ambient temperature, and a large amount of oil cuttings will appear during use, which will pollute the emulsifier. Poor anti-fouling performance, which reduces the efficacy of emulsifiers or even loses their effect

Method used

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  • Emulsifier for oil-based drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The emulsifier for oil-based drilling fluid is made of the following raw materials in parts by weight: 40 parts of emulsifier base fluid, 25 parts of antifouling emulsion, and 10 parts of white oil;

[0032] The emulsifier is made by the following steps:

[0033] Step S1: Add white oil into the stirred tank at a rotation speed of 300r / min and a temperature of 25°C, stir, add an emulsifier base liquid, and stir for 15 minutes to obtain the first mixed liquid;

[0034] Step S2: Add the first mixed solution prepared in step S1 into a stirred tank at a rotation speed of 200r / min and a temperature of 25°C, stir and add milk antifouling emulsion, and stir for 20 minutes to prepare the second mixed solution ;

[0035] Step S3: The second mixed solution prepared in step S2 was ultrasonically treated for 5 minutes at a frequency of 40 kHz to prepare an emulsifier.

[0036] Described emulsifier base liquid is made by following steps:

[0037]Step A1: Mix pyridine and triethyla...

Embodiment 2

[0047] The emulsifier for oil-based drilling fluid is made of the following raw materials in parts by weight: 43 parts of emulsifier base fluid, 27 parts of antifouling emulsion, and 12 parts of white oil;

[0048] The emulsifier is made by the following steps:

[0049] Step S1: Add white oil into the stirred tank at a rotation speed of 300r / min and a temperature of 25°C, stir, add emulsifier base liquid, and stir for 15 minutes to obtain the first mixed liquid;

[0050] Step S2: Add the first mixed solution prepared in step S1 into a stirred tank at a rotation speed of 200r / min and a temperature of 25°C, stir and add milk antifouling emulsion, and stir for 20 minutes to prepare the second mixed solution ;

[0051] Step S3: The second mixed solution prepared in step S2 was ultrasonically treated for 5 minutes at a frequency of 40 kHz to prepare an emulsifier.

[0052] Described emulsifier base liquid is made by following steps:

[0053] Step A1: Mix pyridine and triethylami...

Embodiment 3

[0063] The emulsifier for oil-based drilling fluid is made of the following raw materials in parts by weight: 48 parts of emulsifier base fluid, 28 parts of antifouling emulsion, and 13 parts of white oil;

[0064] The emulsifier is made by the following steps:

[0065] Step S1: Add white oil into the stirred tank at a rotation speed of 400r / min and a temperature of 30°C, stir, add an emulsifier base liquid, and stir for 20 minutes to obtain the first mixed liquid;

[0066] Step S2: Add the first mixed solution prepared in step S1 into a stirred tank at a rotation speed of 300r / min and a temperature of 30°C, stir and add milk antifouling emulsion, and stir for 30 minutes to prepare the second mixed solution ;

[0067] Step S3: The second mixed solution prepared in step S2 was subjected to ultrasonic treatment for 10 min at a frequency of 50 kHz to obtain an emulsifier.

[0068] Described emulsifier base liquid is made by following steps:

[0069] Step A1: Mix pyridine and t...

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Abstract

The invention discloses an emulsifier for an oil-based drilling fluid. The emulsifier is prepared from the following raw materials in parts by weight: 40-50 parts of an emulsifier base solution, 25-30parts of an anti-fouling emulsion and 10-15 parts of white oil, an emulsifier base solution is prepared in the preparation process; the emulsifier base solution takes tall oil fatty acid as a raw material, converts carboxyl in the tall oil fatty acid into acyl chloride under the action of triphosgene, reacts with ammonia to amidate the tall oil fatty acid; furthermore, bis (1, 5-cyclooctadiene) nickel is used as a catalyst, a carbon-nitrogen bond on amide is cut off and methanol is taken as a nucleophilic reagent, the tall oil fatty acid is further esterified after amidation to obtain an emulsifier base solution, the emulsifier base solution is further treated to obtain the emulsifier, after the emulsifier is mixed with the oil-based drilling fluid, the demulsification voltage of an oil-based system can be increased, and the emulsifier also has a relatively strong anti-pollution effect, greatly improves the temperature resistance of the oil-based system, and is stable in performance and simple to use.

Description

technical field [0001] The invention belongs to the technical field of emulsifier preparation, in particular to an emulsifier for oil-based drilling fluid. Background technique [0002] With the continuous reduction of oil reserves and the difficulty of mining, countries all over the world have increased investment in the exploration and development of oil and gas resources in deep formations. The development of new oil reservoirs has become an urgent requirement for the development of major oil companies today. Oil and gas resources are mainly distributed in basins, 73% of which are buried in deep layers, and the underground conditions are extremely complex. Therefore, deep and ultra-deep well oil and gas drilling and supporting development technologies have become the key factors restricting the development of oil and gas resources. As the formation depth increases, the formation temperature of deep wells and ultra-deep wells will also become higher and higher. The high-te...

Claims

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Application Information

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IPC IPC(8): C09K8/03C09K8/035
CPCC09K8/03C09K8/035
Inventor 柳云涛
Owner ANHUI LUHAI PETROLEUM AUX TECH
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