Organic clay for oil base drilling fluid and production process thereof

An oil-based drilling fluid and organoclay technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor high temperature resistance of organobentonite, no report of organic rectorite, long process of organobentonite, etc. , to achieve good organic effect, beneficial to wall protection and underground safety, and good thermal stability

Inactive Publication Date: 2012-10-03
CELEBRITIES INVESTMENT GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 4) The production process of organic bentonite is generally long, especially in ion exchange, which requires a long period of solution system reaction
[0010] 5) The high temperature resistance of organic bentonite is not good
[0014] Despite these advantages of rectorite, the use of organic rectorite in oil-based drilling fluids has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: 400kg calcium-based rectorite clay (0.55mmol / g blue absorption, rectorite content 73%, water content 6.5%) is crushed to particle diameter 0.173mm (80 orders, finer The better), put it in an industrial sand mixer, heat 100kg of pasty octadecyldimethylbenzyl ammonium chloride with a net content of 75% (the rest is water) to 30°C, add 20kg of industrial water, Make it fluid, then add this aqueous solution to the sand mixer, adjust the gap between the rollers to make the force stronger, and perform shear extrusion on the mixed material. The time of shear extrusion is 30 minutes, release, and age for 7 minutes. day, dried to a moisture content of 6%, and ground to a particle diameter of 0.173mm (80 mesh, the finer the better) with a pulverizer (hammer crusher or Raymond machine), the organic rector of Example 1 was obtained stone. The measured performance parameters are shown in Table 1.

Embodiment 2

[0040] Embodiment 2: except that the shear extrusion time is 60min, all the other are the same as embodiment 1, and the obtained embodiment 2

[0041] Organic rectorite. The measured performance parameters are shown in Table 1.

Embodiment 3

[0042] Embodiment 3: Except that the shear extrusion time is 90min, the others are the same as in Embodiment 1, and the organic rectorite of Embodiment 3 is obtained. The measured performance parameters are shown in Table 1.

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PUM

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Abstract

The invention discloses organic clay for oil base drilling fluid, which consists of 75 to 90 weight parts of rectorite and 10 to 25 weight parts of quaternary ammonium salts. The production process comprises the following steps of: A, drying; B, organizing reaction; and C, seasoning, drying and grinding the dried product into powder. The organic clay and the production process have the advantages that: the calcium-base rectorite clay is used directly without sodium treatment, the process is simple, operation is convenient, the used amount of the quaternary ammonium salts is over 40 percent lower than that of organic bentonite, cost is low, and an organizing effect is good; the organic clay has high viscosity, a moderate yield value and low filtration loss, can reduce the added amount of organic soil during slurry preparation and saves cost; the filtration loss is low, mud cakes are thin, smooth, compact and favorable for wall protection and downhole safety; and the thermo-stability is high, the high-temperature resistance of the organic clay is superior to that of the bentonite, the organic clay can be highly compatible with other clay and finishing agents, lubrication is high, a drilling speed can be accelerated, drills can be saved, and drilling cost can be reduced.

Description

technical field [0001] The invention relates to a material used for drilling and drilling in industries such as petroleum, natural gas, geological mines, and construction engineering, and belongs to the field of drilling compositions. Specifically, it relates to an organic clay for oil-based drilling fluid and a production method thereof. Background technique [0002] Before the present invention, the organoclay used in oil-based drilling fluid (including oil / water emulsion drilling fluid) mostly adopts bentonite as raw material. Its preparation process generally uses sodium-based bentonite as raw material, and undergoes cation exchange after fully reacting with quaternary ammonium salts. [0003] The viscosifying and cutting effect of organic bentonite is generally not too strong. Taking the national standard SY / ZQ 003-89 as an example, the standard stipulates that the properties of organic soil for oil-based drilling fluid are: colloidal rate 90%; plastic viscosity ≥ 6 m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03
Inventor 汪昌秀孙国洪王继祥
Owner CELEBRITIES INVESTMENT GROUP
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