... Stellite 31 pc B on 25Cr - 10.5Ni - 2Fe - 7.5W - 0.5C - bal Co. Stel - MDC 1.37 Borofuse Stellite 3 . pc B on 31Cr - 12.5W - 2.4C - bal Co. Stel - MDC .83 ... Borofuse WC ..... pc B on WC . MDC .72 Borofuse PM moly . pc B on Mo CM - MDC ...
Directional Drilling for Coalbed Degasification: Program Goals and Progress in 1978
... calculation is valid because , regardless of the previous history of a ... calculations are carried out for samples heated to each higher temperature . However , it ... sheet of glazed paper and retrieving spillage , mostly fine dust , as ...
Degasification of the Mary Lee Coalbed, Brookwood, Ala
... drill 3-5 / 8 - inch ( 92.1 - mm ) bit tends to wear the bottom side of the ... Table 1 shows control parameters for a standard drill string . These can be ... speeds . TABLE 1 . - Drilling parameters for standard drill string Bit ...
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