FIELD: oil and gas.
SUBSTANCE: invention relates to compositions for drilling wells in intervals formed by clayey rocks. The polymer-stabilized microdisperse drilling composition comprises, g/l: pH regulator - sodium hydroxide NaOH 0.5-1.0; a primary structure former - clay powder “ПБМБ 15.0-20.0”; an encapsulator for drilled rock - polyanionic flocculant polyacrylamide Praestol 2540 0.2-0.5; a filtration reducer - polyanionic cellulose “РАЦ-Н 3.5-4.5”; bactericide Bioplast 1.0-1.4; a lubricating additive - a composition of vegetable and mineral oils “СМЭГ-5 10.0-12.0”; aqueous emulsion of organosilicon polymers - defoamer Polydefom 1.8-2.0; acid-soluble weighting agent Micromarble MP-3, MP-4 to the required density of the solution; the rest is fresh water.
EFFECT: reduction in well construction time by increasing the manufacturability of the drilling composition.
1 cl, 1 tbl
| Title | Year | Author | Number |
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