Rotational drill bits and drilling apparatuses including the same

(19)

(11)

EP 2 733 305 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	09.12.2015 Bulletin 2015/50

(43)	Date of publication A2:
	21.05.2014 Bulletin 2014/21

(21)	Application number: 13193101.6

(22)	Date of filing: 15.11.2013

(51)

International Patent Classification (IPC):

E21D 20/00^(2006.01)
E21B 10/55^(2006.01)

E21B 10/43^(2006.01)
E21B 10/60^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

(30)

Priority:

15.11.2012 US 201213678105

(71)	Applicant: Dover BMCS Acquisition Corporation
	Orem, Utah 84058 (US)

(72)	Inventor:
	Cox, Sean, E. Spanish Fork Utah 84660 (US)

(74)	Representative: D Young & Co LLP
	120 Holborn London EC1N 2DY London EC1N 2DY (GB)

(54)	Rotational drill bits and drilling apparatuses including the same

(57) A roof-bolt drill bit. The roof-bolt drill bit may include a bit body rotatable about a central axis and a cutting element coupled to the bit body. The bit body may comprise a forward end, a rearward end axially spaced away from the forward end, and an internal passage defined within the bit body, with the internal passage extending from a rearward opening defined in the rearward end of the bit body through at least a portion of the bit body. A fluid port is configured to direct fluid from the internal passage through a port opening in a direction that forms an angle with respect to a forward direction of the central axis.

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