Diamond Drilling With Surfactants in Upper Michigan Conglomerates Using Surface-set Bits,.
Unger-HF; Snowden-BS; Engelmann-WH
Proc 6th Conf on Drilling and Rock Mechanics AIME SPE 4236 PP 71-77 :7 pages
A drilling study was carried out, testing two rotational speed levels, two diamond bit grade levels, and four flushing agents (including water as control). The lower speed and higher thrust yielded faster penetration rates over those of the higher speed/lower thrust combination. Comparison of all low-speed/high- thrust groups of tests shows that the nonionic surfactant produced a 35-percent overall average increase over water, the anionic a 29- percent increase, and the cationic a 28-percent increase. These increases in penetration rates resulted in a 22- to 26-percent reduction in cost over flushing with water alone.
Proc. 6th Conf. on Drilling and Rock Mechanics, AIME, SPE 4236, PP. 71-77