SU1726491A1 - Lubricant additive to drilling mud - Google Patents

Abstract

Essence: the lubricant additive contains either chalk, or carbon black, or graphite 70-80 wt.% And glycol esters of high molecular weight synthetic fatty acids 20-30 May. % Characteristic of the additive: the product is a loose mass that is portable, stable at low temperatures, precisely metered into a buropoy solution and does not adversely affect the rheology of the mud. The consumption rate of the additive is 1–3% by weight of the drilling mud. 3 tab.

Description

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WITH

The invention relates to the drilling of wells using drilling fluids and can be used in the oil and gas, mining and geological exploration.

A known plastic lubricant composition to a drilling fluid contains petroleum and carbon black, where diesel oil or gas condensate is used as petroleum in the following ratio of components, wt%:

Soot40-50

Oil productsEverything

The main disadvantage of this lubricant composition is its low performance, which consists in the fact that the additive, which is a plastic mass, greatly increases its viscosity at negative temperatures, which makes it extremely difficult to work with it.

A lubricant used in mechanical engineering and containing graphite is also known, and organophosphorus products are used as an organic component.

Due to the fact that drilling fluids come into contact with the environment, in the first place with groundwater and open water bodies, they are subject to strict requirements for their toxicity. The lubricant containing these components cannot be used as a lubricant additive to muddy mud, since organophosphorus products, by their toxicity, belong to the 2nd and 3rd hazard class, i.e. have high toxicity, In addition, these organophosphate products, especially with alkylaromatic radicals, have poor biodegradability. Phosphates and their derivatives, as well as products of partial biodegradation, falling into the aquatic environment, cause

-h

to about

4 S

rapid algae growth, which leads to clogging and siltation of natural water bodies.

Closest to the present invention is a lubricant for clay solutions containing high molecular weight fatty acids, a non-ionic surfactant and an alkaline agent.

Bentonite clay, graphite, rosin are additionally introduced into the lubricant composition, and caustic soda is used as an alkaline agent in the following ratio of ingredients, wt.%: 10-15 bentonite clay, 10-15 graphite, rosin 3-5, caustic soda 1, 5-2.0, non-ionic surfactant 2-3, high molecular weight fatty acids else.

It is prepared by mixing these products. The resulting lubricant composition is a semi-solid mass of dark brown color with a slightly pronounced specific odor.

However, this lubricant composition has an insufficiently convenient commercial form — it is a semi-solid mass, which at negative temperatures thickens and coalesces, which makes it extremely difficult to deliver, store and accurately meter this product into the drilling fluid in winter conditions.

The purpose of the invention is to maintain the stability of the lubricant additive during storage for a month at low temperatures, to improve the product form.

Improving the flow form for C4f; T lend flowability ensures the accuracy of the dosage of lubricant additives in the drilling fluid and ease of transportation.

The goal is achieved by the fact that a lubricant additive, including organic and mineral products, contains either chalk, or carbon black, or graphite as a mineral product, and glycol esters of high molecular weight fatty acids in the quality of organic product in the following ratio, wt.%:

Mel, or Salkha, or

graphite 70-80

Glycolic esters

high molecular weight acids 20-30

The proposed product is a loose mass that is easily packaged in bags and satisfies the above requirements, namely, transportable, stable during storage, precisely metered into the drilling fluid.

The use of these components in the indicated ratios provides an improvement in the operational properties of the additive — stability is maintained during storage for a month at both 25 ° C and 10 ° C, and the commodity form is improved by giving flowability.

To obtain the proposed additive use: mineral products - chalk,

carbon black; graphite; organic product — glycol esters of high molecular weight synthetic fatty acids, which are obtained either by esterification or by hydroxyethylation of high molecular weight synthetic fatty acids (FFA),

The following high-molecular acids were used: FFA of the C21-C25 fraction or vat residue, produced by FLC,

The proposed lubricant additive is obtained by vigorously mixing the ingredients of the lubricant additive in the indicated ratios when spraying the molten organic product onto the mineral.

In tab. 1 shows examples of the proposed lubricant additive and its characteristics.

When applying glycol ethers more than 30% (example 5) deteriorates the product

form of lubricant additive.

When applied less than 20% of this product (Example 4), the lubricating ability of the additive deteriorates.

In tab. 2 a comparison of a number of indicators for the known and proposed lubricant additives.

Given in Table. 2 data suggests that the proposed lubricant additive with the same lubricant

the ability retains a free-flowing commodity form both at 25 ° C and at -10 ° C for a month.

The proposed lubricant additive does not adversely affect

Claims (1)

The main parameters of the drilling fluid are filtration (f) and static shear stress (SNA), as shown in Table. 3. Invention Lubricant additive to clay mud, containing organic and mineral products, characterized in that, in order to preserve its stability during storage for a month at low temperatures, to improve its commercial form, it contains as organic product glycol ethers of high molecular weight synthetic fatty acids, and as mineral products chili chalk, or carbon black, or graphite in the following ratio of components, May. %: Chalk, or soot, or graphite. Glycolic esters 70-80 high molecular weight synthetic fatty acids 20-30 Table 1 Continuation of table 1 Note. The consumption rate of the additive is 1-3% by weight of the drilling fluid. Tables a. 2 Table 3