SU1601104A1 - Agent for treating drilling mut containing salts of alkali-earth metals - Google Patents

Abstract

The invention relates to the drilling of oil and gas wells. The goal is to increase the ability of the reagent to stabilize the structural-mechanical and filtration parameters of the drilling fluid. The reagent contains the following ingredients with their ratio, im.%: As calcium hydroxide - waste of asbestos cement industry - 50-80

water - the rest. The ingredients in it are thoroughly mixed to prepare the reagent. 1 tab.

Description

The invention relates to the drilling of oil and gas wells, in particular to the washing of a well bore.

The purpose of the invention is to increase the ability of the reagent to stabilize the structural-mechanical and filtration parameters of drilling mud containing alkaline-earth metal salts.

The reagent includes calcium hydroxide and water, and, as calcium hydroxide, it contains waste from the asbestos-cement industry — isolate, with the following ratio of ingredients, wt.%:

Izol50-80

WaterEverything

Waste production asbestos-cement industry (isol) has the following component composition, wt.%: Asbestos15-20

Serpentine 25-30

5-10

Hydrosilicates

calcium

Hydroxide

Calcium Else

The concentration limits of the substances entering the reagent are chosen based on the fact that, with a higher water content in the reagent, when treating drilling mud, the latter is highly diluted, with a lower water content (less than 20 wt), it is impossible to obtain a homogeneous mass. In addition, the reagent (isolate aqueous suspension) can be further treated with other reagents, for example, PRS, CSSC.

and etc.

The table shows the parameters of drilling fluids treated with lime milk (known), lime milk mixed with abscess and the proposed reagent. The presented results prove the advantages of isolate, which can be introduced in the amount of 2-10 masD from the volume of drilling mud (per active substance) depending on the required parameters of drilling mud and on the production of super-desirable drilling mud.

Example. 50 g of isolate are thoroughly stirred in 50 g of water, after which the reagent obtained is introduced in 500 m

10% brine calcium chloride and treated with 25 g KSSB- ..

Claims (1)

The improvement of the technological parameters of drilling fluids with the introduction of isolate is due to the fact that, when producing asbestos-cement products, the milk of lime modifies asbestos at high temperature and mixing. As a result, an active structurant is obtained that actively interacts with the components of the dispersion medium to form organic-mineral compounds on the surface of the dispersed phase, similar to those found in solution. Formula of Absorption Reagent for treating drilling mud, mud, alkaline earth metal salts, including calcium hydroxide and water, characterized in that, in order to increase its ability to stabilize the structural-mechanical and filtration parameters of the drilling fluid, it contains calcium as hydroxide industry - isol, with the following ratio of ingredients, May Waste cement industry Water Bentonite 80 FHLS 50 CMC-700 5 Hydrox | d sodium 5- Calcium chloride 20 Water Same Bentonite 80 FHLS 50 CMC-700 5- Sodium hydroxyl 5 Calcium chloride 20 Water Ditto 292510/148 322812/188 381 216/2110 adftg2 4/326 1 55628/375 486134/455 Calcium bromide 560 HPP 8 Water “AOR Same Bishofit 600 Starch 20 Sodium hydroxide 15 Water 365 Bischofite bos starch 20. Sodium hydroxide 15 Water 365 Ditto 100 g of a 30% calcium hydroxide solution 100 g of reagent: 80 masd of isolate, 20 wt. water 120 g of reagent: 80 wt.% isola, 20 wt.% water 100 g of a 30% calcium hydroxide solution 100 g of reagent: 75% by weight of isolate, 25% by weight of water Note. 2 — dynamic viscosity of drilling mud; T500 conditional viscosity; b, / 6 (0 — static shear stress; P — water loss of drilling mud. Table continuation 70 O / O12 57 O / O10 85 | / 556 9 1st / 3 26Vl8 .11 318/2112 A83 / 518