Drain hole drilling

Details Drain hole drilling Drain hole drilling

1982-09-02

1984-04-24

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

166 50, 175 61, E21B 33138, E21B 4332

Patent

active

044442653

ABSTRACT:
A method for enhancing the recovery of liquid products from a wellbore having at least one laterally extending drain hole wellbore extending therefrom wherein a portion of the earth around the primary wellbore and a part of the drain hole wellbore is treated to render same essentially gas impermeable so that gas cannot prematurely cone into the primary wellbore, thereby enhancing the liquid recovery by way of the drain hole wellbore before gas reaches the drain hole wellbore.

REFERENCES:
patent: 2236836 (1941-04-01), Prutton
patent: 2404341 (1946-07-01), Zublin
patent: 2713906 (1955-07-01), Allen
patent: 3297088 (1967-01-01), Huit et al.
patent: 3779315 (1973-12-01), Bonean
patent: 3782467 (1974-01-01), Hessert
patent: 4009755 (1977-03-01), Sandiford
Moore III, "ARCO Drills Horizontal Drainhole for Better Reservoir Placement", Oil and Gas Journal, Sep. 15, 1980, 175-61.

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