دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

abbr: circulated;used in drilling reports. circle wrench n: see wheel-type back-off wrench.

n: see wheel-type back-off wrench.

n: a wheelshaped wrench that is attached to the sucker rod string at the surface and is manually turned to unscrew the string to allow it to be pulled from the well. Also called a back- off wheel or a circle wrench.