翻訳と辞書 Words near each other ・ Rate gyro ・ Rate integrating gyroscope ・ Rate limiting ・ Rate Mahatmaya ・ Rate making ・ Rate of change ・ Rate of climb ・ Rate of convergence ・ Rate of evolution ・ Rate of exploitation ・ Rate of fire ・ Rate of flow ・ Rate of heat flow ・ Rate of infusion ・ Rate of natural increase ・ Rate of penetration ・ Rate of profit ・ Rate of reinforcement ・ Rate of response ・ Rate of return ・ Rate of return on a portfolio ・ Rate of return pricing ・ Rate of solution ・ Rate of turn ・ Rate of turn indicator ・ Rate of unemployment ・ Rate pressure product ・ RATE project ・ Rate ratio ・ Rate risk Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Rate of penetration ： ウィキペディア英語版 Rate of penetration In the drilling industry, the rate of penetration (ROP), is the speed at which a drill bit breaks the rock under it to deepen the borehole. Also known as ''penetration rate'' or ''drill rate''. It is normally measured in feet per minute or meters per hour, but sometimes it is expressed in minutes per foot. Generally, ROP increases in fast drilling formation such as sandstone (positive drill break) and decreases in slow drilling formations such as shale (reverse break). ROP decreases in shale due to diagenesis and overburden stresses. Over pressured zones can give twice of ROP as expected which is an indicative of a well kick. Drillers needs to stop and do the bottoms up. ==See also== *Drilling rig 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rate of penetration」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.