{{Issues| {{cleanup|date=June 2017|reason=Contains a lot of unlinked jargon. Should maybe be part of a larger article on drilling.}} {{One source|date=February 2025}} }} In the drilling industry, the '''rate of penetration''' ('''ROP'''),<ref>{{cite web |title=How to Optimize the Rate of Penetration in Drilling |url=https://www.esimtech.com/how-to-optimize-the-rate-of-penetration-in-drilling.html |website=esimtech.com |access-date=5 February 2025 |date=24 April 2024}}</ref> also known as '''penetration rate''' or '''drill rate''', is the speed at which a drill bit breaks the rock under it to deepen the borehole. 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 need to stop and do the bottoms up.
==See also== *Drilling rig
==References== {{reflist}}
==External resources== *[http://wiki.aapg.org/Rate_of_penetration Rate of penetration]
Category:Drilling technology Category:Physical quantities Penetration
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