FIELD: oil and gas-extracting industry.
SUBSTANCE: invention relates to drilling oil and gaseous holes, namely, to buffer liquids used for removing clay crust from the hole walls before its strengthening. The water-base buffer liquid of physical-chemical effect comprises, wt.-%: sodium bisulfate, 5.5-10; quinhydrone, 0.01-0.3, and water, the balance. Invention provides enhancing chemical activity of buffer liquid that results to reducing strength of clay crust after treatment of crust with buffer liquid and enhancing hermetic nature between cement stone and the hole wall.
EFFECT: improved and valuable properties of liquid.
1 tbl
Title | Year | Author | Number |
---|---|---|---|
FLUSH FLUID | 2010 |
|
RU2455334C2 |
FLUSH FLUID | 2015 |
|
RU2592308C1 |
METHOD OF PREPARING WELLS TO CEMENTATION | 1999 |
|
RU2137906C1 |
WELL CEMENTING METHOD | 2008 |
|
RU2382172C1 |
METHOD OF PREPARATION FOR CEMENTING OF WELLS DRILLED USING INVERT-EMULSION DRILLING MUD | 2010 |
|
RU2452849C1 |
BUFER FLUID | 0 |
|
SU945379A1 |
WATER-BASED SPACER FLUID | 0 |
|
SU1740628A1 |
COMBINATED-ACTION BUFFER FLUID | 0 |
|
SU939728A1 |
SPACER LIQUID USED IN CEMENTING OF CASING STRINGS | 2008 |
|
RU2378313C1 |
STRUCTURED FLUSH FLUID | 2022 |
|
RU2792473C1 |
Authors
Dates
2007-10-27—Published
2004-12-22—Filed