دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a clause in an oil and gas lease that releases nonproducing acreage (horizontal release) or zones (vertical release) at the end of the primary term or some other specified period. Under the clause, unproductive or untested zones and acreage that are outside a producing pooled unit must be released if drilling or exploration does not occur by the end of the specified time. Also called a Freestone rider.