Drainhole drilling

Details Drainhole drilling Drainhole drilling

1984-01-04

1988-02-09

Novosad, Stephen J.

Wells

Processes

Specific propping feature

166308, E21B 4326

Patent

active

047236043

ABSTRACT:
A method for drilling and completing a drainhole wellbore wherein the drainhole is hydraulically fractured using a fracturing liquid which has a viscosity that is not substantially greater than that of diesel oil, said fracturing liquid carrying a solid propping agent to be deposited in the fractures to prevent same from closing, whereby due to the low viscosity of said fracturing liquid, said propping agent preferentially settles into fractures which extend downwardly from said drainhole thereby allowing fractures which extend upwardly from said drainhole to close up and prevent premature flow of gas into said drainhole by way of said upwardly extending fractures while leaving said downwardly extending fractures permanently propped open for enhanced production of liquid into said drainhole.

REFERENCES:
patent: 3127937 (1964-04-01), McGuire, Jr. et al.
patent: 3858658 (1975-01-01), Strubhar et al.
patent: 3878884 (1975-04-01), Raleigh
Babcock et al., "Ditribution of Propping Agents in Vertical Fractures", pp. 11-17, Nov. 1967.

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