Drilling apparatus

Details Drilling apparatus Drilling apparatus

1975-07-16

1977-09-20

Purser, Ernest R.

Boring or penetrating the earth

With magazine for successively moving unconnected, oriented...

175 85, 173 23, 173 44, 173164, E21B 1914

Patent

active

040490653

ABSTRACT:
A wheeled or crawler-type vehicle carries a support structure for a drilling apparatus such as used in rock drilling. The support structure includes a tower enclosing a rotary rack for drill rods which may be screwed together by cone threads to form a drill string. The tower is attached to a subtower that can be swivelled relative to the support structure for drilling in any desired angular position. Various devices greatly facilitate the storing and handling of each topmost drill rod. There are transverse drives as well as centering, gripping and retaining means, preferably operated by fluid cylinders, for moving the rotary rack and for transferring the respective drill rod from or to nesting seats in the rotary rack that can be revolved stepwise into accurate juxtaposition with a transfer aperture at the drilling center in line with the drilling head. The latter may be provided with an auxiliary motor to increase the effective torque for heavy duty, e.g. for breaking the screwed connection of the topmost drill rod to the drill string which operation may be assisted by a double spindle system in the drilling head owing to positively locking matched profiles at the drill rod end. Similar matched profiles in the other implements aid in the transfer operations as well.

REFERENCES:
patent: 2255241 (1941-09-01), Brown
patent: 2596670 (1952-05-01), Francis et al.
patent: 2849212 (1958-08-01), Robbins
patent: 3181630 (1965-05-01), Coburn
patent: 3333646 (1967-08-01), Hoen et al.
patent: 3395766 (1968-08-01), Granville
patent: 3493061 (1970-02-01), Gyongyosi
patent: 3684039 (1972-08-01), Coyne
patent: 3741322 (1973-06-01), Wolters
patent: 3766995 (1973-10-01), Young et al.

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