METHOD AND DEVICE FOR WATER ISOLATION DURING WELL BORING Russian patent published in 2004 - IPC

Abstract RU 2235190 C2

FIELD: well drilling equipment, particularly for isolation thereof.

SUBSTANCE: method involves mudding pore channels of bed during initial bed drilling with the use of drilling fluid and drilled rock particles. Drilling fluid includes plugging mixture to create shield impermeable to bed water around well shaft. Shield is formed of solid particles of drilling fluid and plugging mixture. Depth of their penetration into bed is calculated from mathematical expression. Device for above method realization includes body, rubber members arranged on body and bushings. Body is provided with thread made on ends thereof. Bushing dimension is selected according to mathematical expression and provides through channels between rubber members.

EFFECT: prevention of water inflow during initial drilling in water-developed bed.

3 cl, 3 dwg

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RU 2 235 190 C2

Authors

Shakhmaev Z.M.

Rakhmatullin V.R.

Sajfullin R.M.

Fatkhlislamov R.U.

Timergalin F.I.

Dates

2004-08-27—Published

2001-08-29—Filed