Plugging agent while drilling, preparation method of plugging agent while drilling and application of plugging agent while drilling in water-based drilling fluid
A technology of water-based drilling fluid and plugging while drilling, which is applied in the field of drilling fluid and can solve problems such as formation loss
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preparation example 1
[0038] This preparation example is used to illustrate the preparation method of water-based drilling fluid.
[0039] (1) 6 parts by weight of bentonite and 0.3 parts by weight of sodium carbonate were added to 100 parts by weight of water and stirred for 6 hours, and left to stand for 24 hours;
[0040] (2) Under high-speed stirring conditions, 0.6 parts by weight of coating agent PAC-141, 4 parts by weight of fluid loss additive, 4 parts by weight of inhibitor, 2 parts by weight of viscosity reducer, 3 parts by weight of high-efficiency Lubricants and 20 parts by weight of the weighting agent are added to the prehydrated base slurry.
Embodiment 1
[0042] This example is used to illustrate the preparation of lost circulation agent while drilling and its use in water-based drilling fluid.
[0043] (1) Mixing: first mix 35kg elastic graphite, 30kg calcium carbonate, 20kg coke particles and 15kg vermiculite evenly;
[0044] (2) Grinding: Grinding the mixture prepared in step (1) in a HGM80 mill until the particle size is 1 μm to 800 μm;
[0045] (3) Stirring: 60kg and 20kg of asbestos fibers and 20kg of mica flakes in the mixture prepared in step (2) are stirred evenly in a mixer to obtain the finished product.
[0046] In step (2), the particle size of the grinding is proportioned in the following manner: particles with a particle size between 1 and 500 μm account for 58 to 62% of the total volume, and particles with a particle size between 1 and 600 μm account for 58% of the total volume. 80-84%, and particles with a particle size between 1-700 μm account for 91-95% of the total volume.
[0047] In step (3), the length ...
Embodiment 2
[0051] This example is used to illustrate the preparation of lost circulation agent while drilling and its use in water-based drilling fluid.
[0052] (1) Mixing: first mix 34kg elastic graphite, 31kg calcium carbonate, 19kg coke particles and 16kg vermiculite evenly;
[0053] (2) Grinding: Grinding the mixture prepared in step (1) in a HGM80 mill until the particle size is 1-800 μm;
[0054] (3) Stirring: 60kg and 20kg of asbestos fibers and 20kg of mica flakes in the mixture prepared in step (2) are stirred evenly in a mixer to obtain the finished product.
[0055] In step (2), the particle size of the grinding is proportioned in the following manner: particles with a particle size between 1 and 500 μm account for 58 to 62% of the total volume, and particles with a particle size between 1 and 600 μm account for 58% of the total volume. 80-84%, and particles with a particle size between 1-700 μm account for 91-95% of the total volume.
[0056] In step (3), the length of the...
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