FIELD: soil or rock drilling; mining.
SUBSTANCE: invention relates to drilling of oil and gas wells, in particular to inhibited drilling mud, which are used for drilling of terrigenous rocks, folded by unstable swelling argillites and clays, prone to collapse. Inhibited drilling fluid contains, wt. %: caustic soda 0.15–0.2; xantamic range biopolymer 0.25–0.3; starch reagent 3–4; sodium formate 20–35; liquid glass 1.5–2; lubricating additive 0.5–1.0; bactericide 0.1–0.2; antifoaming agent to 0.03; marble chips to required density; fresh water - balance.
EFFECT: technical result is minimization of risks and improvement of parameters in construction of wells with high vertical displacement, higher quality of fastening of production strings with optimization of costs for drilling wells in complicated mining and geological conditions, increased ability of well shaft cleaning and swelling inhibition of shale rocks, absence of enzymatic decomposition of polysaccharide components of solution for well drilling.
1 cl, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| HIGHLY INHIBITED CLAY-FREE EMULSION DRILLING MUD | 2018 |
|
RU2698389C1 |
| CLAY-FREE DRILLING FLUID FOR COMPLETION OF FORMATIONS OF CONTROLLED DIRECTIONAL AND HORIZONTAL WELLS IN CONDITIONS OF ABNORMALLY HIGH FORMATION PRESSURES | 2010 |
|
RU2440397C1 |
| HIGH-MINERALIZATION CLAYLESS DRILLING MUD | 2004 |
|
RU2277572C1 |
| STRENGTHENED MINERALIZED BORING SOLUTION FOR THE OPENING OF PRODUCTIVE PLATES WITH ABNORMALLY HIGH PLASTIC PRESSURE | 2018 |
|
RU2683448C1 |
| WEIGHTED MINERALIZED CLAYLESS DRILLING MUD | 2017 |
|
RU2655276C1 |
| CLAY-LESS POLYSACCHARIDE DRILLING AGENT | 2009 |
|
RU2427605C1 |
| CLAYLESS DRILLING MUD | 2004 |
|
RU2277571C1 |
| DRILLING MUD | 2004 |
|
RU2277569C1 |
| PROCESS FLUID FOR BORING, COMPLETION AND MAJOR REPAIRS OF OIL AND GAS WELLS UNDER ABNORMALLY HIGH FORMATION PRESSURE AND ELEVATED TEMPERATURE CONDITIONS | 2002 |
|
RU2215016C1 |
| HEAT-RESISTANT BIOPOLYMER DRILLING MUD | 2018 |
|
RU2711222C1 |
