Method for controlling direction of horizontal borehole

Details Method for controlling direction of horizontal borehole Method for controlling direction of horizontal borehole

1978-10-25

1980-01-22

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175 62, E21C 1500, E21C 1900

Patent

active

041845536

ABSTRACT:
A heavy cylinder having an axial flow passage is pumped down a rotary drill string to a position adjacent a drill bit to cause an in-seam horizontal drill to be guided in a downward direction. The cylinder can be removed with a latchable retrieval tool after the path of the borehole is sufficiently altered.

REFERENCES:
patent: 3120282 (1964-02-01), Pickard
patent: 3823787 (1974-07-01), Haworth et al.
patent: 4108256 (1978-08-01), Moore
Bromell, "How You Can Lower Your Drilling Costs with a Planned Crooked Hole Program", World Oil, Dec. 1954, pp. 129-132, 134, 136.
Cervik et al., "Rotary Drilling Holes in Coalbeds for Degasification", Bureau of Mines, Report of Investigations 8097, published in 1975, 21 pages.
Wiley, "New `Packed Hole` Tool Combats Hole Deviation", Drilling, Jun. 1965, pp. 62-65, 67, 68, 74, 75.

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