FIELD: drilling fluids.
SUBSTANCE: invention relates to water-based drilling fluids, namely, polycationic drilling fluids, and can be used in drilling clay and productive sediments and renovation of wells with low formation pressures in oil and gas fields. Clay-free polycationic drilling fluid includes, by % of weight: chalk 2.3-3.3; starch 0.9-1.7; biopolymer 0.3-0.4; polyvinylpyrrolidone 0.8-1.3; cationic polymer Silfok-2540C 3.0-4.0; propylene glycol 3.8-6.6; low molecular weight electrolyte - ammonium acetate 4.6-6.6; facilitating additive - liquid paraffin 7.7-10.0; the rest is water.
EFFECT: increased efficiency of drilling of productive sediments, as well as improved quality of repair of wells with low formation pressures.
1 cl, 5 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| LOW CLAY POLYCATIONIC DRILLING FLUID | 2022 |
|
RU2794254C1 |
| POLYCATIONIC DRILLING FLUID FOR DRILLING SALT DEPOSITS | 2022 |
|
RU2806397C1 |
| REAGENT-STABILIZER AND DRILLING FLUID BASED ON IT | 2022 |
|
RU2801236C1 |
| THERMOSALINE-RESISTANT DRILLING FLUID | 2019 |
|
RU2740459C1 |
| THERMAL RESISTANT POLYCATIONIC DRILL MUD | 2017 |
|
RU2651657C1 |
| THERMAL-SALT-RESISTANT DRILLING FLUID | 2019 |
|
RU2739270C1 |
| HYDROGELMAGNIUM DRILLING SOLUTION | 2018 |
|
RU2681009C1 |
| CATIONIC DRILLING MUD | 2017 |
|
RU2655267C1 |
| PSEUDOPLASTIC DRILLING FLUID FOR IMPROVING WELLBORE CLEANING AND DRILLING METHOD USING IT (VARIANTS) | 2022 |
|
RU2798347C1 |
| REAGENT FOR IMPROVING THE RHEOLOGICAL PERFORMANCE OF POLYCATIONIC DRILLING FLUIDS | 2022 |
|
RU2801238C1 |
