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Keywords: circulation rate
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Proceedings Papers

Paper presented at the Drilling and Rock Mechanics Symposium, January 14–15, 1969
Paper Number: SPE-2388-MS
... and penetration rate, whether controlled by rotary speed or by weight on bit. Factors affecting either of the two parameters of this relationship are shown to be differential pressure on bottom, mud characteristics, circulation rate, jet velocity and rock-bit design. Examples are cited from...
Proceedings Papers

Paper presented at the Conference on Drilling and Rock Mechanics, January 17–19, 1965
Paper Number: SPE-1052-MS
... of these factors: (1) overburden pressure (2) borehole pressure (3) interstitial pressure (4) water saturation of the sample (5) fluid circulation rate (6) rock debris on the hole bottom (7) temperature differential between the flushing air and the rock mass EQUIPMENT AND MATERIALS A microbit drilling apparatus...

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