The invention relates to a propulsion device for the setting of the drilling tube screen systems, with a drilling device (2), with a drill rod (3) which, with the drilling device (2) and, by means of this is in operative connection with a rotary - and / or percussive motion is displaceable, in order to drill a hole, with a plurality of interconnected tubular screen tubes (5), the at least the drill string (3) into the borehole and remain at the ends in each case a region with an internal thread (6) have. According to the invention, it is proposed that in each case two pipe screen tubes (5) by means of a sleeve (7) are connected, the sleeve (7) has an external thread (8) and the external thread (8) with the internal threads (6) of the two pipe screen tubes (5), in such a way that the sleeve (7) has an inside diameter (9), which is greater than the outer diameter (10) of the drill rod assembly (3), so that the drill string (3) via the sleeve (7) along the pipe screen tube (5) a - and / or can be carried out and that the ends (13) of the sleeve (7) a chamfer (11) in order to have a hooking of the drill rod assembly (3) during a - or carrying out to avoid. The present invention also relates to a pipe screen tube (5) for use in a forward drive the drilling apparatus (1), whereby the pipe screen tube (5) two ends, each with a region with an internal thread (6) comprises. According to the invention, it is proposed that the internal thread (6) has an inside diameter (17), the greater than the inside diameter (16) of the pipe screen tube (5), so that a stop (15) for a in the pipe screen tube (5), which is screwed socket (7) is produced. Furthermore, the invention relates to a socket for connecting two pipe screen tubes (5) in a forward drive the drilling apparatus (1), wherein said sleeve (7) two ends (13), each with a region with an external thread (8) comprises. According to the invention, it is proposed that the ends (13) of the sleeve (7) a chamfer (11) in order to have a hooking of the drill rod assembly (3) during a - or carrying out to avoid.
展开▼
