دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a small-diameter pipe or scabbard under the derrick floor in which a jiont of drill pipe is temporarily stored for later connection to the drill string.

a hole in the rig floor designed to hold a joint of pipe. The rat hole (a term also used for the borehole below the pay zone) holds the Kelly when it has to be disconnected.

old term for rat hole.

n: 1.a 30 to 35 ft. cased hole drilled at one corner of the derrick floor used to store the swivel and kelly while making a trip. 2. sometimes refers to a hole of reduced sizein the bottom of the regular well bore. In some cases the driller rat-hole-ahead

the hole through the rig floor where the kelly can be stored when it has to be disconnected.

the hole below the pay zone. Commonly drilled to drop off perforating guns or as a gathering or sump area for liquids to separate from gas prior to being pumped out of the well.