Side hole drilling in boreholes

Details Side hole drilling in boreholes Side hole drilling in boreholes

1978-05-05

1980-10-07

Leppink, James A.

Boring or penetrating the earth

Processes

Boring horizontal bores

64 2R, 64 3, 175320, E21D 1000

Patent

active

042262887

ABSTRACT:
Apparatus for use in a borehole or other restricted space to bore a side hole into the strata surrounding the borehole, including a flexible shaft with a drill at its end, and two trains of sheathing members that can be progressively locked together into a rigid structure around the flexible shaft as it is directed sidewardly into the strata.

REFERENCES:
patent: 1367042 (1921-02-01), Granville
patent: 2344277 (1944-03-01), Zublin
patent: 2574657 (1951-11-01), Pierce
patent: 2696264 (1954-12-01), Colmerauer et al.
patent: 3805462 (1974-04-01), Caperton
patent: 4062412 (1977-12-01), McIlvanie

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