This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: engage the pumps or the rotary while tripping pipe, which cannot be done easily with the kelly system. Modern topdrives are a major improvement to drilling rig technology and are a large contributor to the ability to drill more difficult extended-reach wellbores. In addition, the topdrive enables drillers to minimize both frequency and cost per incident of stuck pipe. Stuck pipe is a consequence of pore mud qualities. Dr illing fluids, typically called mud, are pumped into the hole during drilling. The mud is used to cool the drill bit and hole bottom as well as remove cuttings....
View Full Document
- Spring '09