Lubricant for drilling fluids and preparation method thereof

Abstract

The invention discloses a lubricant for drilling fluid and a preparation method thereof. Oil-phase nonionic surfactant is added to a reactor and stirred for reaction, so as to obtain the lubricant. The method has the characteristics that the method is simple to operate, low in requirements on equipment and environment, easy to realize and capable of effectively reducing and regulating sticking coefficient. The lubricant prepared by the method has the characteristics of good dispersibility in prepared slurry, small particle size and good lubrication effect.

Description

technical field

[0001] The invention relates to a lubricant and a preparation method thereof, in particular to a lubricant for drilling fluid and a preparation method thereof. Background technique

[0002] With the expansion and deepening of oil and gas exploration and development, the intensity of drilling and development has been increasing, the difficulty of drilling has increased, and the complexity of drilling has become more prominent. There are more and more wells with special conditions such as deep wells, ultra-deep wells, directional wells, highly deviated wells, horizontal wells, multi-bottom wells, slim hole wells, high temperature and high pressure differential wells, and high-density long open hole wells, and the drilling speed needs to be greatly increased . The ever-increasingly difficult drilling technology puts forward higher requirements on the lubricating performance of drilling fluids, and the demand for lubricants is increasing.

[0003] Currently com...

Examples

Embodiment 1

[0023] The lubricant components are as follows:

[0024] All are parts by weight (unit: kilogram), and the total amount is 100 parts:

[0025] 99.2 parts of liquid paraffin, 0.8 parts of nonionic surfactant Span80.

[0026] Preparation:

[0027] Mix 99.2 parts of liquid paraffin and 0.8 parts of nonionic surfactant Span80 uniformly in a reactor, and keep stirring at 25°C and 300 rpm for 30 minutes to obtain a lubricant for drilling fluid.

[0028] Take the lubricant prepared by the above method, and investigate the reduction rate of its adhesion coefficient, and the results are shown in the table.

[0029] Lubricant Appearance Uniform and transparent Reduction rate of adhesion coefficient (0.5wt% addition) 70-80％ Filtration / mL 13-15

[0030] The adhesion coefficient measurement experiment of the lubricant that the present invention relates to is as follows:

[0031] Preparation of base slurry: Add 16g of calcareous bentonite and 0.8g of anhydrou...

Embodiment 2

[0039] Method is substantially as described in Example 1, the difference is:

[0040] The components are as follows, all in parts by weight (unit: kilogram), and the total amount is 100 parts:

[0041] 99.5 parts of 7# white oil, 0.5 parts of Brij52.

[0042] The above components were uniformly mixed in the reactor, and stirred continuously for 60 minutes under the conditions of 30° C. and 100 rpm to obtain a lubricant for drilling fluid.

[0043] Take the lubricant prepared by the above method, and investigate the reduction rate of its adhesion coefficient. The relevant experimental data are as follows:

[0044] Lubricant Appearance Uniform and transparent Adhesion coefficient reduction rate (0.2wt% addition) 30-40％ Filtration / mL 13-15

Embodiment 3

[0046] Method is substantially as described in embodiment 1 or 2, the difference is:

[0047] The components are as follows, all in parts by weight (unit: kilogram), and the total amount is 100 parts:

[0048] 99 parts of 10# white oil, 1 part of Span80.

[0049] The above components were uniformly mixed in the reactor, and stirred continuously for 15 minutes under the conditions of 20° C. and 3000 rpm to obtain a lubricant for drilling fluid.

[0050] Take the lubricant prepared by the above method, and investigate the reduction rate of its adhesion coefficient. The relevant experimental data are as follows:

[0051] Lubricant Appearance Uniform and transparent Adhesion coefficient reduction rate (1wt% addition) 80-95％ Filtration / mL 13-14

technical field

[0001] The invention relates to a lubricant and a preparation method thereof, in particular to a lubricant for drilling fluid and a preparation method thereof. Background technique

[0002] With the expansion and deepening of oil and gas exploration and development, the intensity of drilling and development has been increasing, the difficulty of drilling has increased, and the complexity of drilling has become more prominent. There are more and more wells with special conditions such as deep wells, ultra-deep wells, directional wells, highly deviated wells, horizontal wells, multi-bottom wells, slim hole wells, high temperature and high pressure differential wells, and high-density long open hole wells, and the drilling speed needs to be greatly increased . The ever-increasingly difficult drilling technology puts forward higher requirements on the lubricating performance of drilling fluids, and the demand for lubricants is increasing.

[0003] Currently com...

Examples

Embodiment 1

[0023] The lubricant components are as follows:

[0024] All are parts by weight (unit: kilogram), and the total amount is 100 parts:

[0025] 99.2 parts of liquid paraffin, 0.8 parts of nonionic surfactant Span80.

[0026] Preparation:

[0027] Mix 99.2 parts of liquid paraffin and 0.8 parts of nonionic surfactant Span80 uniformly in a reactor, and keep stirring at 25°C and 300 rpm for 30 minutes to obtain a lubricant for drilling fluid.

[0028] Take the lubricant prepared by the above method, and investigate the reduction rate of its adhesion coefficient, and the results are shown in the table.

[0029] Lubricant Appearance Uniform and transparent Reduction rate of adhesion coefficient (0.5wt% addition) 70-80％ Filtration / mL 13-15

[0030] The adhesion coefficient measurement experiment of the lubricant that the present invention relates to is as follows:

[0031] Preparation of base slurry: Add 16g of calcareous bentonite and 0.8g of anhydrou...

Embodiment 2

[0039] Method is substantially as described in Example 1, the difference is:

[0040] The components are as follows, all in parts by weight (unit: kilogram), and the total amount is 100 parts:

[0041] 99.5 parts of 7# white oil, 0.5 parts of Brij52.

[0042] The above components were uniformly mixed in the reactor, and stirred continuously for 60 minutes under the conditions of 30° C. and 100 rpm to obtain a lubricant for drilling fluid.

[0043] Take the lubricant prepared by the above method, and investigate the reduction rate of its adhesion coefficient. The relevant experimental data are as follows:

[0044] Lubricant Appearance Uniform and transparent Adhesion coefficient reduction rate (0.2wt% addition) 30-40％ Filtration / mL 13-15

Embodiment 3

[0046] Method is substantially as described in embodiment 1 or 2, the difference is:

[0047] The components are as follows, all in parts by weight (unit: kilogram), and the total amount is 100 parts:

[0048] 99 parts of 10# white oil, 1 part of Span80.

[0049] The above components were uniformly mixed in the reactor, and stirred continuously for 15 minutes under the conditions of 20° C. and 3000 rpm to obtain a lubricant for drilling fluid.

[0050] Take the lubricant prepared by the above method, and investigate the reduction rate of its adhesion coefficient. The relevant experimental data are as follows:

[0051] Lubricant Appearance Uniform and transparent Adhesion coefficient reduction rate (1wt% addition) 80-95％ Filtration / mL 13-14

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