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Cleaning agent for oil-based drilling fluid as well as preparation method and evaluation method thereof

An oil-based drilling fluid and evaluation method technology, which is applied to chemical instruments and methods, drilling compositions, instruments, etc., can solve the problems of inaccurate testing of the cleaning effect of cleaning agents, long stirring reaction time, and many operating steps , to achieve the effects of low preparation cost, simple and safe on-site operation, and simple preparation process

Active Publication Date: 2017-05-10
广汉市福客科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cleaning agent has certain high temperature stability and excellent oil removal effect, but its preparation process needs to be heated to a high temperature of 60 ° C, and the stirring reaction time is long, and there are many operating steps. Moreover, the evaluation method used is Engine oil is used as the oil to be removed. There are certain differences in the components and properties of engine oil and oil-based drilling fluid, which lacks pertinence and cannot accurately test the cleaning effect of cleaning agents on oil-based drilling fluid.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The mass percent of each raw material component is: 50% of tetraethylenepentamine, 25% of coconut oil diethanolamide, 15% of 2-methylimidazoline, and 10% of dimethylacetamide.

[0030] The preparation method of the cleaning agent for the oil-based drilling fluid: (1) weigh tetraethylenepentamine, coconut oil diethanolamide, 2-methylimidazoline and dimethylacetamide by mass percentage; (2) first Add tetraethylenepentamine into the reactor, start stirring, then dropwise add coconut oil diethanolamide and dimethylacetamide, then add 2-methylimidazoline, continue stirring for 5 minutes, then raise the temperature to 45°C, and keep stirring at constant temperature for 30 minutes ; (3) cooling to room temperature to obtain the cleaning agent.

Embodiment 2

[0032] The mass percent of each raw material component is: 55% of tetraethylenepentamine, 23% of coconut oil diethanolamide, 13% of 2-methylimidazoline, and 9% of dimethylacetamide.

[0033] The preparation method of the cleaning agent for the oil-based drilling fluid: (1) weigh tetraethylenepentamine, coconut oil diethanolamide, 2-methylimidazoline and dimethylacetamide by mass percentage; (2) first Add tetraethylenepentamine into the reactor, start stirring, then dropwise add coconut oil diethanolamide and dimethylacetamide, then add 2-methylimidazoline, continue stirring for 5 minutes, then raise the temperature to 47°C, and keep stirring at constant temperature for 40 minutes ; (3) cooling to room temperature to obtain the cleaning agent.

Embodiment 3

[0035] The mass percent of each raw material component is: 58% of tetraethylenepentamine, 20% of coconut oil diethanolamide, 14% of 2-methylimidazoline, and 8% of dimethylacetamide.

[0036] The preparation method of the cleaning agent for the oil-based drilling fluid: (1) weigh tetraethylenepentamine, coconut oil diethanolamide, 2-methylimidazoline and dimethylacetamide by mass percentage; (2) first Add tetraethylenepentamine into the reactor, start stirring, then dropwise add coconut oil diethanolamide and dimethylacetamide, then add 2-methylimidazoline, continue stirring for 5 minutes, then raise the temperature to 48°C, and keep stirring at constant temperature for 40 minutes ; (3) cooling to room temperature to obtain the cleaning agent.

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Abstract

The invention discloses a cleaning agent for an oil-based drilling fluid as well as a preparation method and evaluation method thereof. The cleaning agent is prepared from the following components in percentage by weight: 50-60% of tetraethylenepentamine, 20-25% of fatty acid alkanol amide, 10-15% of 2-methyl-2-imidazoline and 5-10% of dimethylacetamide. The preparation method of the cleaning agent comprises the steps of: adding the tetraethylenepentamine into a reactor according to the percentage by weight, starting stirring, dripping fatty acid alkanol amide and dimethylacetamide, then adding 2-methyl-2-imidazoline, after continuing stirring for 5min, heating the mixture to 45-50 DEG C, stirring for 30-60min at constant temperature, and cooling the mixture to room temperature to obtain the cleaning agent. The evaluation method of the cleaning agent comprises determination of drainage time: (1) preparation of a standard test fluid; (2) preparation of a pulp sample; and (3) determination of the drainage time. The cleaning agent prepared by the preparation method is excellent in temperature resistance, and has an excellent cleaning effect for the residual oil-based drilling fluid which has complex components, a stable rubber matrix structure and high adhesion strength.

Description

technical field [0001] The invention relates to a cleaning agent, in particular to a cleaning agent for oil-based drilling fluid. Background technique [0002] With the continuous increase of deep wells, high temperature wells and shale gas wells, the application of oil-based drilling fluids is also increasing. Downhole oil pollution poses great restrictions on oil and gas production evaluation, drilling and completion engineering progress, fracturing and acidizing construction and safety. In order to reduce the damage of oil-based drilling fluid residues to production formations and improve the cleaning efficiency of in-hole pipe strings and surface equipment, it is necessary to clean oil-based drilling fluid residues. Traditional cleaning agents have poor cleaning effect on oil-based drilling fluid residues with complex components and stable colloidal structure. Especially in the process of cleaning high-temperature wells, traditional cleaning agents cannot meet the tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/52G01N33/00G01N25/52G01N25/04G01N11/00
Inventor 金承平张超王泽东
Owner 广汉市福客科技有限公司
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