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- W2503762466 abstract "The objective was to develop and demonstrate the performance of new drill bit designs utilizing sintered polycrystalline diamond compacts for the cutting edges. The scope included instrumented rock cutting experiments under ambient conditions and at elevated temperature and pressure, diamond compact wear and failure mode analysis, rock removal modeling, bit design and fabrication, full-scale laboratory bit testing, field tests, and performance evaluation. A model was developed relating rock cutting forces to independent variables, using a statistical test design and regression analysis. Experiments on six rock types, covering a range of compressive strengths from 8 x 10/sup 3/ psi to 51 x 10/sup 3/ psi, provided a satisfactory test of the model. Results of the single cutter experiments showed that the cutting and thrust (penetration) forces, and the angle of the resultant force, are markedly affected by rake angle, depth of cut, and speed. No unusual force excursions were detected in interrupted cutting. Wear tests on two types of diamond compacts cutting Jack Fork Sandstone yielded wear rates equivalent at high cutting speeds, where thermal effects are probably operative. At speeds below approx. 400 surface feet per minute (sfm), the coarser sintered diamond product was superior. 28 refs., 235 figs., 55 tabs." @default.
- W2503762466 created "2016-08-23" @default.
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- W2503762466 date "1984-04-01" @default.
- W2503762466 modified "2023-09-23" @default.
- W2503762466 title "Geothermal COMPAX drill bit development. Final technical report, July 1, 1976-September 30, 1982" @default.
- W2503762466 doi "https://doi.org/10.2172/5882826" @default.
- W2503762466 hasPublicationYear "1984" @default.
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