SU721522A1 - Composition for separating flows of liquids - Google Patents

Description

The invention relates to the fastening of wells. A known buffer fluid is a mixture of an aqueous solution of sodium hexametaphosphate, an aqueous solution of carboxymethylcellulose, and an aqueous solution of a surfactant (disolvan), to displace drilling fluids. However, this buffer fluid does not allow separation of drilling mud and grouting solutions. A composition for the separation of liquid streams is also known, containing carboxymethylcellulose, alkali, causticum, agrimus gel and water. However, this composition is intended to displace flushing fluids in fresh water. Tsol1. of the invention is the separation of the enhanced mineralized brownish {.lOCTBopou and cellar at O - 10 ° C and the formation of a stable gel of healing tralisers / 1% of the gel and does not cause coagulation in the contact zones with flushing and backfilling solutions. The goal is achieved by the fact that in the proposed composition containing carboxymethylcellulose, alkali, utah, gelling agent and water, lignin is used as a gelling agent, and the composition additionally contains a gelation initiator — chromium nitrate in the following ratio of components, wt.%: Carboximestils cellulose O, 2O-O, 35 0.20-0.35 Alkaline 28.00-53.8O Ut Desirer 4.2O-6.6O Lignin 0.2O-O, 35 Chromium Nitrate Ostplnaya As an ut zhelitel composition contains barium sulfate . The technology of preparation of the buffer fluid includes the following ops) preparations: preparation of 9, O% aqueous aqueous solution of lignin;

treatment of pfi or rstvorp linshpp to due to the introduction of cool or soda ash;

introduction of chromium nitrate chromium lignin and redoxoxane-methyl cellulose into the P4pen 1b th pncTnoi-i

After thorough mixing, the resulting solution becomes gelled, capable of transporting the desired material, which allows, if necessary, to obtain an enhanced solution with a density of 2.1 g / cm.

In order to assess the qualities of the developed buffer fluid, experiments were performed to determine the coagulation of the contact zones of the buffer fluid and the drilling fluid, and the buffer fluid and the flavor fluid. Portwaste cement USHTS-12O, UTsG-1 is taken as real. Research showings | that the mixtures of the buffer liquid and the cement slurry taken in ratios 1: 1, 1: 3 and 3: 1, in the range of 5-80 ° C, do not thicken within two hours, which is sufficient for pumping the cement slurry.

Based on the study of the spreadability of contact zones, it has been established that the developed salt-containing buffer liquid has an adjustable density and high mobility, does not form zones

P224

G10G51.1 |; r-11IOY VYALKSMLI P / 1 Gy, CHIDO with TLMpop .- / kiy and buropym rlsgporpmn with rpznoi chemical processing and iji um1ts, 1i-kgg of premaxiya zastonapi tampia rlst5 thieves. In connection with this, izbrotino allows to improve the quality of the pontomonous annular space and the intervals of high bedding.

Formula

acquisitions

1. A composition for separating streams-liquids containing carboxymethylcellulose, alkali, emulsifier, gelling agent and water, which is TeMj that, in order to increase the salt resistance of the composition, as a gelling agent contains lignin and additionally contains gelation initiator - chromium nitrate in the following ratio of components, wt.%:

Carboxymethylcellulose, OO, 35

Alkali

0.20-0.35

Uatte 28,00-53,80

Lignin 4.2 O-6.6 O

Chromium nitrate 0.20-0.35

Water

Rest.

2. Composition no. 1 5 O tl and h a yui u. due to the fact that the composition contained barium sulphate as an additive.

Claims (2)

Claim 1. Composition for separating fluid flows, containing carboxymethyl cellulose, alkali, weighting agent, gelling agent and water, based on the fact that, in order to increase the salt resistance of the composition, it contains lignin as a gelling agent and add - 2 ° contains gelation initiator - chromium nitrate in the following ratio of components, wt.%: Carboxymethyl cellulose 0.20-0.35 Alkali 0.20-0.35 ²⁵ Weighting agent 28.00-53.80 Lignin 4.20-6.60 Chromium nitrate 0.20-0.35 Water Else. 2. The composition of ps π. 1, about t and h and y - 30 4 u. with the fact that the composition contains barium sulfate as a weighting agent.