Boring or penetrating the earth – With orienting or racking means for unconnected tools or...
Patent
1992-12-22
1994-03-29
Bagnell, David J.
Boring or penetrating the earth
With orienting or racking means for unconnected tools or...
166 775, 175 52, 414 2266, F21B 1914
Patent
active
052976424
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for storing drill rods, comprising two drill rod cartridges each comprising a rotating rotor provided with finger boards, means for guiding the drill rods into gaps formed by the finger boards circumferentially around the axis of the rotor, a feed opening for both drill rod cartridges for feeding the drill rods into the cartridge, and means for displacing the drill rods into the cartridges and out therefrom.
In long-hole drilling the hole is drilled by using extension rods as drill rods, whereby several extension rods or drill pipes of equal length are added one at a time into a sequence to achieve the required hole length. As used in this patent application, the term drill rod refers to solid drill rods or hollow drill pipes. In mechanized drilling, extra or unused drill rods or pipes are stored in various mechanical apparatuses from which a drill rod or pipe is taken and connected to the drill string used in the drilling when required. Such arrangements for storing drill rods or pipes are disclosed e.g. in PCT Application WO84/01599 and USSR Inventor's Certificate 1370225. PCT Application WO84/01599 teaches that drill rods or pipes are placed in two cartridge racks each provided with a rotating rotor. Both rotors are divided into radial storage compartments each containing several drill rods or pipes radially one after another. The publication also discloses a displacing device positioned between the cartridge racks spaced apart from each other. By means of the displacing device one drill rod at a time can be taken out of either cartridge and displaced to the drilling centre. A problem with the arrangement of the publication is that there is provided no kind of support for the drill rods or pipes positioned in the storage compartment close to the discharge opening. A further problem is that the operator has to select and guide the displacing device to the desired cartridge rack both on picking up and on storing rods, and both the picking up of rods and the storing of rods is totally unorganized. Furthermore, in the arrangement of the publication, it cannot be ensured that the rods will not fall out of their hole for some reason, wherefore the arrangement cannot be used in drilling machines in which the drilling direction may vary and in which the whole drilling equipment moves between the drilling operations.
USSR Inventor's Certificate 1370225, in turn, discloses an arrangement in which drill rods or pipes are positioned on a horizontally movable chain formed by chute-like portions and rolled up on both sides of the positioning device. In this arrangement, drill rods or pipes are positioned in superimposed layers and they are supported at the layers whereas they are loose in the space between the chain rolls, and the apparatus can be used only in the horizontal position because otherwise the drill rods or pipes would fall.
It is also known to store drill rods in an individual drill rod cartridge in which drill rods are positioned in one storage compartment at a time similarly as in the above-mentioned PCT application. A problem with this arrangement is the small amount of drill rods or pipes, which cannot be increased to any greater degree on account of the increasing diameter and the resulting clumsiness of the apparatus.
An object of the present invention is to provide an apparatus to be used with a moving drilling equipment and having a greater drill rod or pipe capacity than prior art arrangements. In the apparatus of the present invention, the feeding of drill rods or pipes into the apparatus and out of it takes place in a controlled manner, the drill rods and pipes being all the time supported and guided in such a way that they will not fall regardless of the operating position. According to the invention, this is achieved in such a manner that
the two cartridges have a common feed opening positioned substantially midway between the cartridges in such a way that the central line of the feed opening is substantially in the middle of the distance between the axe
REFERENCES:
patent: 4892160 (1990-01-01), Schivley, Jr. et al.
Hakkinen Leo
Kaakkurivaara Jouko
Koskelo Pekka
Launiemi Markku
Rajakallio Pauli
Bagnell David J.
Tamrock Oy
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