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High-performance organic rectorite used for oil-based drilling fluids and a producing method thereof

A technology of oil-based drilling fluid and production method, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of unimproved product formula composition, affecting the effect of organicization, and affecting the effect of organicization, so as to achieve compensation Insufficient cation exchange capacity, stable comprehensive performance, excellent effect of high temperature stability

Inactive Publication Date: 2016-04-27
WUHAN HUAKUANG COLLOID CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of technology, first, the technology disclosed in patent 201010258856.0 has not been selected and purified, and has not undergone pretreatment steps such as sodiumization, which affects the effect of organicization
Second, the technology disclosed in patent 201010258856.0 does not heat the rectorite / quaternary ammonium salt covering agent during organicization, and only relies on the heat generated by rolling friction to maintain the cation exchange reaction, which affects the organicization effect
Third, the technology disclosed in the patent 201010258856.0 allows Ca in the final product of the organic reaction ++ Ions, Mg ++ Ions, Cl - Impurities such as ions remain in the product, and the final product is not washed, which affects product performance
[0005] In addition to patent 201010258856.0, patent 201510893277.6 also involves organic rectorite for oil-based drilling fluid, but it only improves the process of patent 201010258856.0, and does not improve the formula composition of the product, which is a partial improvement

Method used

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  • High-performance organic rectorite used for oil-based drilling fluids and a producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using calcium-based rectorite raw ore with a rectorite grade of 45% as raw material, the rectorite concentrate is obtained through primary crushing-scrubbing-mashing-screwing-hydrocyclone-dense sedimentation and other separation steps. The content is 75%, dried and crushed to 100 mesh for later use.

[0030] In the reaction vessel, add 100 parts of calcium-based rectorite powders (100 meshes) containing 75% rectorite and 6% water content through selection, add 2 parts of sodium carbonate, 1.5 parts of lithium carbonate, Add 200 parts of water to the mixed solution of 200 parts of water, heat and stir at a speed of 120 rpm, and raise the temperature to 90°C. Keep stirring for 45 minutes, take 35 parts of octadecyldimethylbenzyl ammonium chloride with a net content of 70%, add it to the container, keep the temperature of the container at 90°C, continue stirring at a speed of 120 rpm, and carry out organic reaction for 90 minutes. Stop the reaction, add 200 parts of water...

Embodiment 2

[0032]Using the rectorite concentrate with a purity of 75% obtained in Example 1 as a raw material, the rectorite with a purity of 90% was obtained through the steps of ultra-fine crushing-polyphosphate dispersion-stirring-centrifugation and other steps , dried and crushed to 100 mesh for later use. The specific purification route is to add 100 parts of rectorite concentrate with a purity of 75% to 800 meshes to 1400 parts of water, then add 2.8 parts of sodium hexametaphosphate to it, and place it in a mixing tank for linear speed of 8.5 Stir at m / s for 60 minutes to form a uniformly dispersed suspension, and then place the suspension in a centrifuge for centrifugation. The separation factor is 3200, and the separation time is 1.5 minutes. suspend the rectorite slurry, then dehydrate, dry and pulverize the suspension slurry to obtain a purified rectorite product with a purity of 90% and an equilibrium water content of 6%.

[0033] In the reaction vessel, add 100 parts of cal...

Embodiment 3

[0035] Using the rectorite with a purity of 75% obtained in Example 1 as a raw material, through polyphosphate dispersion-stirring-centrifugation, increasing the separation factor and prolonging the centrifugation time, the rectorite with a purity of 95% was obtained. stone, dried and crushed to 100 mesh for later use.

[0036] The specific purification route is that the rectorite concentrate with a purity of 75% is ultra-finely crushed to 800 mesh, 100 parts are added to 1900 parts of water, and 3.5 parts of sodium hexametaphosphate is added to it, and placed in a mixing tank for linear speed After stirring for 60 minutes at 8.5m / s, a uniformly dispersed suspension is formed, and then the suspension is placed in a centrifuge for centrifugation. The separation factor is 3300, and the separation time is 2 minutes. Tailings and purified The rectorite suspension slurry is then dehydrated, dried and pulverized to obtain a purified rectorite product with a purity of 95% and an equi...

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Abstract

High-performance organic rectorite used for oil-based drilling fluids is disclosed and comprises rectorite and a quaternary ammonium salt. The organic rectorite comprises 65-75 parts by weight of the rectorite and 25-35 parts by weight of the quaternary ammonium salt. A producing method of the organic rectorite includes A) grading the rectorite, or grading and purifying the rectorite, B) performing sodium modification / lithiation pretreatment, C) performing an organification reaction on the quaternary ammonium salt, D) filtering and washing, and E) ageing, drying and smashing. The organic rectorite is advantageous in that the graded and purified rectorite raw material and the quaternary ammonium salt with a long chain are adopted as main components, and the maximum allowed adding amount of the quaternary ammonium salt is greatly increased. By steps of sodium modification / lithiation composite modification pretreatment, high-temperature wet organification, washing, filtration, ageing, drying, smashing, and the like, comprehensive properties of the organic rectorite can be better and stabler, a disadvantage that cation exchange capacity of the rectorite is insufficient is overcome, and characteristics of the organic rectorite such as good colloidality and excellent high-temperature stability are fully exerted.

Description

technical field [0001] The invention relates to a colloidal material used in drilling fluids and well completion fluids in industries such as petroleum, natural gas, geological mines, and construction engineering and its production technology, belonging to the field of drilling compositions. Specifically, it relates to a formula composition of organic clay for oil-based drilling fluid and its production method. Background technique [0002] Organoclay is an important lipophilic colloidal material in oil-based drilling fluid components. As a new type of clay that can be used in drilling fluids, rectorite has unique advantages in rheology, high temperature stability, and fluid loss control, and is a potential upgrading product in the field of drilling fluids. [0003] Patent 201010258856.0 discloses an organic rectorite for oil-based drilling fluid and its production method. The organic rectorite for oil-based drilling fluid is composed of rectorite and quaternary ammonium sa...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/32
CPCC09K8/035C09K8/32
Inventor 汪昌秀梅宏
Owner WUHAN HUAKUANG COLLOID CHEM CO LTD
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