Drilling apparatus

Details Drilling apparatus Drilling apparatus

E - Fixed Constructions

21

B

E21B 10/18 (2006.01) E21B 7/18 (2006.01) E21B 7/24 (2006.01)

Patent

CA 2068005

The drilling apparatus according to the invention contains a body (1) to which rock-destroying organs - rollers (2) are attached. A subassembly for generating hydrodynamic waves is arranged in the body (1). This subassembly is designed in the form of a turbulence chamber (3) with tangentially arranged entry channels (4) and with a conically tapering outlet channel (5) the frontal surface of which is radially rounded off. See Fig.I

La présente invention concerne un outil de forage constitué d'un corps (1) auquel sont fixés les organes d'attaque (2). Le corps (1) renferme un dispositif générateur de courants hydrodynamiques, en l'occurrence une chambre de turbulence (3) comportant des voies d'entrée tangentielles (4) et une voie de sortie en entonnoir (5) dont l'extrémité est progressivement évasée.

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