دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an assembly of sheaves mounted on beams at the top of the derrick or mast and over which the drilling line is reeved. See block, reeve the line. sheave.

n: An assembly of sheaves or pulleys mounted on beams at the top of the derrick over which the drilling line is reeved.

the set of pulleys or sheaves at the top of the mast on a rig.

n: see reeve the line.

v: to string a wire rope drilling line through the sheaves of the traveling and crown blocks to the hoisting drum.

n: to connect the hoisting block wheel and crown block wheel with steel rope .