| Abstract: | 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) |
| Genre: | USGS Numbered Series |
| ProdID: | 11411 |
| Citation Author: | Teasdale, Warren E. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 31 p. ill. ;26 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 80-1299 |
| Citation Search Results Text: | Test drilling in basalts, Lalamilo area, South Kohala District, Hawaii; 1980; OFR; 80-1299; Teasdale, Warren E. |
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| Citation Year: | 1980 |
| Type: | citation/reference |
| Text: | Test drilling in basalts, Lalamilo area, South Kohala District, Hawaii; 1980; OFR; 80-1299; Teasdale, Warren E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
