Test drilling in basalts, Lalamilo area, South Kohala District, Hawaii

Open-File Report 80-1299


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Test drilling has determined that a downhole-percussion airhammer can be used effectively to drill basalts in Hawaii. When used in conjunction with a foam-type drilling fluid, the hammer-bit penetration rate was rapid. Continuous drill cuttings from the materials penetrated were obtained throughout the borehole except from extremely fractured or weathered basalt zones where circulation was lost or limited. Cementing of these zones as soon as encountered reduced problems of stuck tools, washouts, and loss of drill-cuttings. Supplies and logistics on the Hawaiian Islands, always a major concern, require that all anticipated drilling supplies, spare rig and tool parts, drilling muds and additives, foam, and miscellaneous hardware be on hand before starting to drill. If not, the resulting rig downtime is costly in both time and money. (USGS)

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Test drilling in basalts, Lalamilo area, South Kohala District, Hawaii
Series title Open-File Report
Series number 80-1299
DOI 10.3133/ofr801299
Edition -
Year Published 1980
Language ENGLISH
Publisher U.S. Geological Survey,
Description v, 31 p. ill. ;26 cm.
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