Diamax and Services ad, World Oil, Feb. 15, 1982, p. 250-C. |
1982-1983 Composite Catalog of Oil Field Equipment & Services, vol. 2, pp. 2430, 2431, 2451 and 2452, Gulf Publishing Company. |
"Optimisation of Radial Distribution of Stratapax.TM. (T1) Cutters in Rock Drilling Bits," by John D. Barr, Energy-Sources Technology Conference, New Orleans, Feb. 1980, ASME, Petroleum Division. |
"Bits Containing Stratapax.sup.(T1) Drill Blanks From General Electric Reduce Cost of Deep Drilling in Austin Chalk Formations", Case History 408, dated Dec. 1980, General Electric Company of Worthington, Ohio. |
"Development of Stratapax* Blank Drill Bits for Shale Drilling" by R. P. Radtke of NL Hycalog, Houston, Texas, dated Feb. 1980. |
1980-1981 Composite Catalog of Oil Field Equipment & Services, vol. 2, pp. 2138, 2139, 2317, Gulf Publishing Company. |