Arrangement for guiding a bore-crown or bit along a given path

Details Arrangement for guiding a bore-crown or bit along a given path Arrangement for guiding a bore-crown or bit along a given path

1979-02-26

1980-12-23

Leppink, James A.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

Normally curved guide or shaft

175 61, E21B 708

Patent

active

042405122

ABSTRACT:
An arrangement for guiding a drill crown or bit (8) (FIG. 4) in a given drilling path comprises an outer guide tube (7) in which a shaft (6) is rotatably arranged. The shaft is driven by a drive means (5) connected to one end of the shaft, while the bit (8) is mounted for rotation on and guided by the other end of said shaft. The axis of rotation (9) of the bit forms an angle (.alpha.) with the central axis (10) of the guide tube, said tube being non-rotatably, but axially displaceably connected to an axially feeding device through intermediate means (11).

REFERENCES:
patent: 550783 (1895-12-01), Elliott et al.
patent: 2292126 (1942-08-01), Isley
patent: 2516421 (1950-07-01), Robertson
patent: 2644669 (1953-07-01), Curtis et al.
patent: 2669428 (1954-02-01), Zublin
patent: 2669429 (1954-02-01), Zublin
patent: 3260318 (1966-07-01), Neilson et al.
patent: 3526285 (1970-08-01), Adkins et al.
patent: 3903974 (1975-09-01), Cullen
patent: 4143722 (1979-03-01), Driver

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