EMULSION DRILLING MUD Russian patent published in 2020 - IPC C09K8/28

Abstract RU 2738187 C1

FIELD: oil and gas industry; mining.

SUBSTANCE: invention relates to drilling of oil and gas wells, namely to drilling muds for drilling in complex mining and geological conditions. Emulsion drilling mud contains, wt%: hydrocarbon phase 8-2; polyhydric alcohol - glycol 3-5; modified starch 3-4 as stabilizer; as a rheological properties regulator - biopolymer - xanthan gum 0.3-0.5; magnesium dichloride MgCl₂ 5-7; potassium chloride KCl 5-7; dichlorated calcium CaCl₂ 1-3; calcium carbonate CaCO₃ 5-30; bentonite 1.0-2.5; mineralized or fresh water - balance.

EFFECT: improving inhibiting properties of emulsion drilling mud, preventing swelling of clay rocks, with increasing coefficient of recovery of permeability of productive reservoirs.

1 cl, 3 tbl, 3 ex

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RU 2 738 187 C1

Authors

Chetvertneva Irina Amirovna

Dates

2020-12-09—Published

2020-04-21—Filed