E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 25/00 (2006.01) E21B 23/14 (2006.01)
Patent
CA 2684715
The present invention relates to a drilling system (1) for drilling out a sample of a formation, a well, or the like downhole, comprising a drilling head (2) having an at least partly hollow cylindrical body (3) with a circumferential rim (4). The circumferential rim (4) has at least one cutting edge (5). Furthermore, the drilling system has a driving unit (6) for rotating the cylindrical body and the cutting edge for cutting a piece (7) out of the formation, and a driving tool (8) such as a downhole tractor for driving the drilling head forward in the well or formation (10).
La présente invention concerne un système de forage (1) pour carottage d'échantillon dans une formation, un puits ou analogue, en fond de trou. Il comprend une tête de foreuse (2) dont le corps (3) cylindrique au moins partiellement creux est équipé d'une couronne d'attaque (4). Cette couronne d'attaque (4) comporte au moins un bord de coupe (5). Le système de forage comporte en outre, d'une part une unité motrice (6) assurant la rotation du corps cylindrique et du bord de coupe de façon à tailler une carotte (7) dans la formation, et d'autre part un module d'entraînement (8) tel qu'un tracteur de fond de trou chargé de faire progresser la tête de forage dans le puits ou la formation (10).
Bull Housser & Tupper Llp
Welltec A/s
LandOfFree
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