No-Waterway Or Single Waterway Drill Bits And Systems And Methods For Using Same
A drill bit for forming a hole in a formation. The drill bit has a shank and an annular crown that cooperate to define an interior space that receives water or other drilling fluid. The annular crown defines inner channels spaced circumferentially about an inner surface of the crown and outer channels spaced circumferentially about an outer surface of the crown. The annular crown can completely circumferentially enclose the interior space of the drill bit, or the annular crown can be provided with a single waterway extending between the inner and outer surfaces of the crown.
1 . A drill bit for forming a hole in a formation, the drill bit having a longitudinal axis and comprising:
a shank;
an annular crown having a cutting face, an inner surface, and an outer surface, the full face crown and the shank cooperating to define an interior space about the longitudinal axis,
wherein the annular crown defines a plurality of inner channels spaced circumferentially about the inner surface of the annular crown,
wherein the annular crown defines a plurality of outer channels spaced circumferentially about the outer surface of the annular crown, and
wherein the annular crown completely circumferentially encloses the interior space.
2 . The drill bit of claim 1 , wherein the annular crown does not comprise a waterway extending radially from the inner surface of the annular crown to the outer surface of the annular crown.
3 . The drill bit of claim 1 , wherein the annular crown has a radial thickness between the inner surface and the outer surface, wherein each inner channel of the plurality of inner channels has a radial dimension less than the radial thickness of the annular crown, and wherein each outer channel of the plurality of outer channels has a radial dimension less than the radial thickness of the annular crown.
4 . The drill bit of claim 3 , wherein the ratio between the radial thickness of the annular crown and the radial dimension of the plurality of inner channels ranges from about 1.5:1 to about 3.5:1.
5 . The drill bit of claim 4 , wherein the ratio between the radial thickness of the annular crown and the radial dimension of the plurality of outer channels ranges from about 1.5:1 to about 3.5:1.
6 . The drill bit of claim 3 , wherein the radial dimension of the plurality of inner channels is greater than the radial dimension of the plurality of outer channels.
7 . The drill bit of claim 1 , wherein the number of inner channels is the same as the number of outer channels.
8 . The drill bit of claim 1 , wherein the number of inner channels is greater than the number of outer channels.
9 . The drill bit of claim 1 , wherein the number of inner channels is less than the number of outer channels.
10 . The drill bit of claim 1 , wherein each outer channel of the plurality of outer channels is positioned circumferentially between sequential inner channels of the plurality of inner channels.
11 . The drill bit of claim 1 , wherein the annular crown comprises a single waterway extending radially from the inner surface of the annular crown to the outer surface of the annular crown.
12 . A drilling system comprising:
a drill rig;
a drill string configured to be secured to and rotated by the drill rig; and
a drill bit for forming a hole in a formation, the drill bit having a longitudinal axis and comprising:
a shank;
an annular crown having a cutting face, an inner surface, and an outer surface, the full face crown and the shank cooperating to define an interior space about the longitudinal axis,
wherein the annular crown defines a plurality of inner channels spaced circumferentially about the inner surface of the annular crown,
wherein the annular crown defines a plurality of outer channels spaced circumferentially about the outer surface of the annular crown, and
wherein the annular crown completely circumferentially encloses the interior space.
13 . The drilling system of claim 12 , wherein the annular crown of the drill bit does not comprise a waterway extending radially from the inner surface of the annular crown to the outer surface of the annular crown.
14 . The drilling system of claim 12 , wherein the annular crown of the drill bit has a radial thickness between the inner surface and the outer surface, wherein each inner channel of the plurality of inner channels has a radial dimension less than the radial thickness of the annular crown, and wherein each outer channel of the plurality of outer channels has a radial dimension less than the radial thickness of the annular crown.
15 . The drilling system of claim 14 , wherein the ratio between the radial thickness of the annular crown of the drill bit and the radial dimension of the plurality of inner channels of the annular crown ranges from about 1.5:1 to about 3.5:1.
16 . The drilling system of claim 15 , wherein the ratio between the radial thickness of the annular crown of the drill bit and the radial dimension of the plurality of outer channels of the drill bit ranges from about 1.5:1 to about 3.5:1.
17 . The drilling system of claim 14 , wherein the radial dimension of the plurality of inner channels of the drill bit is greater than the radial dimension of the plurality of outer channels of the drill bit.
18 . The drilling system of claim 12 , wherein the number of inner channels of the drill bit is the same as the number of outer channels of the drill bit.
19 . The drilling system of claim 12 , wherein the number of inner channels of the drill bit is greater than the number of outer channels of the drill bit.
20 . The drilling system of claim 12 , wherein the number of inner channels of the drill bit is less than the number of outer channels of the drill bit.
21 . The drilling system of claim 12 , wherein each outer channel of the plurality of outer channels of the drill bit is positioned circumferentially between sequential inner channels of the plurality of inner channels of the drill bit.
22 . The drilling system of claim 12 , wherein the annular crown comprises a single waterway extending radially from the inner surface of the annular crown to the outer surface of the annular crown.