diameter than central ports 37 and do not have replaceable nozzles the channels formed by blade pattern 17 also include a plurality of short length channels 43 that extend from gage area 15 partially across bit face 13 the inner end of each short length channel 43 is a longer radial distance from axis 14 than the inner end of each intermediate channel 39 each short length channel 39 is located between two of the long channels 19 and extends generally radially parallel to the outer portion of one of the intermediate channels 39 an outer port 44 is formed in crown 11 at the inner end of each short channel 43 farther outward from axis 14 than intermediate ports 41 in this example there are seven outer ports 44 and each is located the same radial distance from axis 14 outer ports 44 also discharge drilling fluid pumped down the drill string however are smaller in diameter than central ports 37 and do not have replaceable nozzles the pattern of the various channels 19 39 and 43 results in blade pattern 17 having a plurality of trunks 45 within central region 16 and extending generally radially outward six of the trunks 45 intersect another trunk 45 each trunk 45 divides into two long branches 47 that spread apart from each other similar to branches of a tree each long branch 47 extends generally radially outward from one of the trunks 45 to gage area 15 a short branch.