Three cone rock bit

Details Three cone rock bit Three cone rock bit

E - Fixed Constructions

21

B

255/73

E21B 10/00 (2006.01)

Patent

CA 1073897

ABSTRACT OF THE DISCLOSURE The disclosure teaches three cone rock bit which includes, in combination, legs and cutters, Projections of the rotational axes of the cutters on a plane perpendicular to the axis of the bit are at an angle to one another, and a flow nipple is provided to supply drilling fluid to the hole bottom. In accordance with the invention, the nipple is placed between the legs of two adja-\ cent cutters, The cutters are positioned in such a way that their rotational axes project on a plane, which is perpendicular to the axis of the bit, to form an angle more than 120° but less than 170°, The flow nipple outlet is placed between the cutters,

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