A technology for preparing mineral composite solid lubricants for drilling based on chemical by-products

A technology of solid lubricants and by-products, applied in the field of mineral composite solid lubricants, can solve problems such as environmental pollution by-products of hydrosulfite, high environmental protection treatment operation costs, etc., and achieve excellent comprehensive lubrication performance, which is conducive to clean production and high prevention collapsing effect

Inactive Publication Date: 2016-01-20
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to comprehensively utilize the environmental pollution caused by the by-products of hydrosulfite and the resulting high environmental protection treatment operating costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The raw materials for preparation are: hydrosulfite by-product residue (or raffinate), surface-modified graphite with a carbon content of 95% under a 100-mesh sieve, flexible expanded graphite with an expansion multiple of 137 times, REO vegetable oil, and a comprehensive performance modifier for drilling fluid (made by Natural asphalt (NA), hydroxyethyl cellulose (HEC), sorbitan monooleate (SPAN) are prefabricated according to the ratio of 3:1:2 by mass percentage).

[0041] The ratio of raw materials is: by mass percentage, 20-50% of hydrosulfite by-product, 10-50% of graphite, 0-20% of expanded graphite, 5-30% of REO vegetable oil, and 10-40% of drilling fluid comprehensive performance regulator. However, the best raw material ratio is 50% of hydrosulfite by-product residue, 15% of surface-modified flake graphite, 5% of flexible expanded graphite, 15% of REO vegetable oil, and 15% of drilling fluid comprehensive performance modifier.

[0042] The preparation method i...

Embodiment 2

[0047] The raw materials for preparation are: hydrosulfite by-product residue (or raffinate), graphite with a carbon content of 90% under a 200-mesh sieve, expanded graphite with an expansion multiple of 150 times, REO animal oil alkanolamide oil-based surfactant, comprehensive performance of drilling fluid Regulator (pre-made from oxidized asphalt (OSA), carboxymethyl cellulose (CMC), cetyltrimethylammonium bromide (CTAB) according to the ratio of 3:2:1 by mass percentage).

[0048] The ratio of raw materials is: by mass percentage, 20-60% of hydrosulfite by-product, 10-60% of graphite and expanded graphite, 5-30% of REO animal oil alkanolamide oil-based surfactant, and 10-60% of drilling fluid comprehensive performance regulator 40%. However, the best raw material ratio is 50% of hydrosulfite by-product residue, 5% of flake graphite, 10% of expanded graphite, 20% of REO animal oil alkanolamide oil-based surfactant, and 15% of drilling fluid comprehensive performance regulato...

Embodiment 3

[0054] The preparation raw materials are: hydrosulfite by-product residue (or raffinate), expanded graphite with an expansion factor of 200 times, REO animal oil, drilling fluid comprehensive performance regulator (composed of sulfonated pitch (FT-342), carboxymethyl starch ether ( CMS), sodium dodecylbenzenesulfonate (ABS) are prefabricated according to the ratio of 3:1:1 by mass percentage).

[0055] The ratio of raw materials is as follows: by mass percentage, 20-60% of hydrosulfite by-product, 10-30% of expanded graphite, 5-30% of REO animal oil, and 10-40% of drilling fluid comprehensive performance regulator. However, the ratio of raw materials is preferably 50% of hydrosulfite by-product, 10% of expanded graphite, 25% of REO animal oil, and 15% of drilling fluid comprehensive performance modifier.

[0056] The preparation method is as follows:

[0057] (1) After mixing and absorbing the hydrosulfite by-product residue, REO animal oil, and expanded graphite, use known m...

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PUM

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Abstract

The invention relates to a technology for preparing a mineral composite solid lubricant for well drilling on the basis of by-products in chemical industry. The solid lubricant is prepared by taking by-product residue (or residual liquid) of sodium dithionite powder distillation as a main ingredient, adopting graphite and / or expanded graphite mineraloid as a loading material, taking animal oil or vegetable oil or oil based surfactants derived from the animal oil or the vegetable oil as a lubricating property regulator, and adding a certain amount of a combined drilling-fluid property regulator prepared by matching special fluid loss additive for drilling fluid, a collapse preventing agent and an emulsifying agent according to a specific proportion through processes such as mixing, extrusion, kneading, and the like. The preparation method comprises a cross blending method, a kneading method, a twin-screw-rod extrusion method, a single-screw-rod extrusion method, and the like. Compared with the prior art, the invention has the advantages of simultaneously enhancing two lubricating properties of the adhesion coefficient reducing rate and the friction resistance coefficient reducing rate of the drilling fluid lubricant, and the collapse preventing property, and has the characteristics of low price, simplicity for production process, convenience for field transport and storage of petroleum drilling and geological prospecting drilling, and the like.

Description

technical field [0001] The invention relates to a technique for preparing a mineral composite solid lubricant for drilling based on chemical by-products. technical background [0002] Hydrosulfite (Na 2 S 2 o 4 2H 2 O), the scientific name is sodium dithionite, under normal conditions, it is white or light yellow sandy crystalline powder, which can be dissolved in cold water. The property of its aqueous solution is very unstable and has strong reducibility. It is widely used in textile, printing and dyeing , papermaking, food processing and other industries, mainly used as printing and dyeing auxiliaries, fabric bleaching agent, pulp bleaching agent, some food preservatives and reducing agents in some chemical manufacturing processes. [0003] The earliest production process of hydrosulfite was zinc powder method, followed by sodium amalgam method, sodium formate method and sodium borohydride method. The zinc powder process is gradually eliminated by the sodium formate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03
Inventor 张以河周风山陆金波孟祥海邢净
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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