FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to the drilling of oil and gas wells, in particular to drilling fluids. A borehole drilling method includes pumping oily borehole fluid into the borehole. Oily borehole fluid contains: an oily dispersion medium; a non-oily dispersed phase; an emulsifier stabilizing the non-oily dispersed phase in the oily dispersion medium; organophilic clay; a weighting agent; and a wetting agent. The wetting agent has GLB in the range from 4 to 10.5, which is selected so that oily borehole fluid has a scale reading at 600 rpm at 4°C (40°F) less than approximately 300 and a 10-minute limit static shear stress of less than approximately 19.15 Pa (40 lbf/100 ft2). Options of oily borehole fluid are claimed.
EFFECT: increase in the efficiency of drilling horizontal wells due to reducing particle sedimentation in drilling fluid and increasing the stability of the emulsion.
19 cl, 23 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| RHEOLOGY MODIFIERS | 2013 |
|
RU2623384C2 |
| WELLBORE SERVICING FLUID, METHODS OF MANUFACTURE AND USE THEREOF | 2022 |
|
RU2816934C1 |
| IMPROVED INVERT EMULSIFIER FOR USE IN DRILLING MUDS WITH INVERT EMULSION | 2021 |
|
RU2786172C1 |
| ULTRA-HIGH-VISCOSITY TAMPONS AND METHODS OF THEIR USE IN DRILLING SYSTEM OF OIL WELLS | 2010 |
|
RU2724060C2 |
| COMPOSITIONS AND METHOD OF WELLBORE CLEANING BEFORE CEMENTATION | 2012 |
|
RU2556557C2 |
| COMPOSITION FOR APPLICATION IN UNDERGROUND OIL WELLS CONTAINING CURABLE RESIN AND ORGANOPHILIC MODIFIED CLAY | 2014 |
|
RU2668432C1 |
| NON-AQUEOUS, ACID-SOLUBLE, HIGH-DENSITY FLUIDS FOR WELL COMPLETION AND METHOD | 2012 |
|
RU2547187C1 |
| PLACING A FLUID COMPRISING KILN DUST IN A WELLBORE THROUGH A BOTTOM HOLE ASSEMBLY | 2014 |
|
RU2657276C1 |
| IMPROVED COMPOSITIONS OF FOAM DRILLING FLUID ON OILY BASE, METHOD FOR THEIR OBTAINING AND APPLICATION | 2009 |
|
RU2435018C2 |
| APPLICATION OF DEGRADABLE FIBERS IN SOLUTIONS OF INVERTED EMULSIONS FOR WELL KILLING | 2010 |
|
RU2499131C2 |
