Drilling bit for drilling while running casing

Details Drilling bit for drilling while running casing Drilling bit for drilling while running casing

E - Fixed Constructions

21

B

E21B 7/20 (2006.01) E21B 10/00 (2006.01) E21B 10/42 (2006.01) E21B 10/54 (2006.01) E21B 17/14 (2006.01)

Patent

CA 2393754

A drill bit for drilling casing in a well bore. The drill bit is constructed from a combination of relatively soft and relatively hard materials. The proportions of the materials are selected such that the drill bit provides suitable cutting and boring of the well bore while being able to be drilled through by a subsequent drill bit. Methods of applying hard materials to a soft material body are provided.

Trépan destiné au tubage de forage dans un puits de forage. Le trépan est constitué d'une combinaison de matériaux relativement souples et relativement durs. On choisit la proportion de ces matériaux de manière à ce que le trépan puisse assurer une coupe et un forage appropriés du puits de forage et permette à la fois le forage par un trépan suivant. L'invention concerne aussi des procédés d'application de matières dures à un corps en matière souple.

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