دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: to continue drilling operations.

n: the continuation of drilling after the abruption caused by some accident

n: refer todrill ahead

continue with drilling after stopping to check flow or other activity.

v: to deepen the hole made by the bit, i.e., to drill ahead.

v: to drill ahead.

drill.

n: 1. a hole in the rig floor, some 30 to 40 feet (9 to 12 metres) deep, which is lined with casing that projects above the floor, into which the kelly and the swivel are placed when hoisting operations are in progress. 2. a hole of a diameter smaller than the main hole and drilled in the bottom of the main hole. v: to reduce the size of the wellbore and drill ahead.

n: a sealing device used to close off the annular space around the kelly in drilling with pressure at the surface, usually installed above the main blowout preventers. A rotating head makes it possible to drill ahead even when there is pressure in the annulus that the weight of the drilling fluid is not overcoming;the head prevents the well from blowing out. It is used mainly in the drilling of formations that have low permeability. The rate of penetration through such formations is usually rapid.

n: The equipment be used to seal the annular space around the kelly in the drilling process.

a circulating connection that allows pipe rotation. Used in cementing with non top-drive rigs.