traveling block


Also found in: Wikipedia.

traveling block

[′trav·əl·iŋ ′bläk]
(mechanical engineering)
The movable unit, consisting of sheaves, frame, clevis, and hook, connected to, and hoisted or lowered with, the load in a block-and-tackle system. Also known as floating block; running block.
References in periodicals archive ?
Its portfolio comprises drilling rig control systems, top drives, traveling blocks, automated pipe handling, iron rough necks, drawworks, derrick structures, drill floor tools, fingerboards, BOP handling equipment, deadline anchors and drill line spoolers.
Parts include, but not limited to mud pumps, drawworks, traveling blocks, hooks, swivels crown blocks and deadline anchors.
The hydraulic braking system, which theoretically equalized the weight of the 28,000 feet of drill string, didn't perform right and the traveling blocks fell over the small area where the driller stands, crushing Lonnie to death.