FIELD: oil, gas and coke-chemical industries.
SUBSTANCE: invention relates to the oil and gas industry. Light-weight polymer-clay drilling fluid for prevention of formation hydraulic fracturing and prevention of absorption at drilling intervals with low reservoir pressure contains the following, wt. %: modified clay powder PBMB 3.0–4.0; polyanionic cellulose PAC-B 0.2–0.3; peat-alkaline reagent PolyTimber 2.0–4.0; surfactant Neonol AF 9–10 0.2–0.4; water is balance.
EFFECT: technical result is optimization of processing properties of drilling fluid, density of drilling mud below water density, high blocking properties, providing trouble-free drilling of wells in conditions of abnormally low formation pressures.
1 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| POLYMER-STABILIZED MICRODISPERSED DRILLING COMPOSITION | 2023 |
|
RU2806712C1 |
| DRILLING MUD | 2002 |
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| CATION-INHIBITING DRILLING MUD | 2015 |
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| INHIBITING DRILLING FLUID FOR DRILLING IN UNSTEADY TERRIGENOUS DEPOSITS | 2020 |
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RU2792854C1 |
| POLYFUNCTIONAL COMPLEX REAGENT FOR WARNING OCCURRENCE OF DIFFERENTIAL STICKING | 2009 |
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| BLOCKING COMPOSITE FOR ISOLATION OF LOSS-CIRCULATION ZONES DURING WELL DRILLING AND WORKOVER OPERATION | 2012 |
|
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| WEIGHTED INHIBITED DRILLING MUD | 2017 |
|
RU2655281C1 |
| DRILLING FLUID FOR FLUSHING OF LONG-DISTANCE STEEPLY INCLINED WELLS UNDER CONDITIONS OF PERMAFROST AND HIGHLY COLLOIDAL CLAY ROCKS, AND ITS APPLICATION METHOD | 2011 |
|
RU2483091C1 |
