Importance

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Abstract

A drill rod suitable for a hydraulic drilling apparatus, at the drilling end (I) of which there is a drilling device (1), that includes at least drilling equipment (2) and hammering equipment (5) as well as preferably flushing equipment (10) also, to drill a hole by use of the drilling equipment (2) by a feeding motion along the longitudinal axis (s) of the drilling device (1) and by a rotational motion (w) around the longitudinal axis (s) as well as by a to-and-from or a like hammering motion (t). The drilling device (1) has jointing equipment (3) for fastening of a drill rod (4) preferably in a removable way to increase the drilling depth of the drilling apparatus. The drill rod (4) consists of a casing structure (8) equipped with corresponding jointing equipment (3) and at least partly inside of which there has been arranged a flow arrangement (7) for leading of hydraulic fluid and/or flushing medium and a coupling arrangement (6) for connecting of the flow arrangement (7) of the drill rod (4) with a corresponding flow arrangement (7) in the drilling device (1) and/or in another drill rod (4) and/or at the driving end (II) of the drilling apparatus. The drill rod (4) is arranged at least partly dismountable to enable its maintenance, by connecting at least part of the part entireties belonging to the same, such as of the casing structure (8), the jointing equipment (3), the coupling equipment (6) and/or the flow arrangement (7) by use of fastening equipment (9) removable with other parts of the drill rod (4).

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First Claim