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Simon's theory |
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Simon's theory [′sī·mənz ‚thē·ə·rē] (engineering) A theory of drilling which includes the effects of drilling by percussion and by vibration with a rotary (oil well) bit, cable tool, and pneumatic hammer; the rate of penetration of a chisel-shaped bit into brittle rock may be defined as follows:R=NAƒv/πD, whereRequals the rate of advance of bit,Nequals the number of wings of bit, ƒvequals the number of impacts per unit time,Dequals the diameter of the bit, andAequals the cross-sectional area of the crater at the periphery of the drill hole. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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