Drilling device with telescopic Kellybar

Details Drilling device with telescopic Kellybar Drilling device with telescopic Kellybar

1994-09-08

1996-03-26

Schoeppel, Roger J.

Boring or penetrating the earth

With tool drive prime mover or above-ground mechanical...

With diversely operated shafts extending into bore

175203, 175220, E21B 402

Patent

active

055012876

ABSTRACT:
The drilling device includes a telescopable Kellybar (16) with an outer tube (17) and at least one telescope tube (18). A tool (22) is mounted to the lower end of the telescope tube (18). In order to supply pressure medium to the drilling tool (22), the telescope tube (18) includes an inner tube (25) which is connected to a pressure line (33) via a rotating head (30). In order to secure the stator of the rotating head against rotation, a rotation protecting means (36) is provided which projects into the outer tube (17). Without exchanging the drilling mast, the drilling device can be used for drill hole depths greater than the length of the drilling mast (10); nevertheless, it can be used with pressure fluid as flushing agent or driving agent for a tool.

REFERENCES:
patent: 1726565 (1929-09-01), Hunt
patent: 1855999 (1932-04-01), Shinn
patent: 1895901 (1933-01-01), Smith
patent: 2781185 (1957-02-01), Robbins
patent: 3131776 (1964-05-01), Kvello-Aune et al.
patent: 3565190 (1971-02-01), Ishii

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