Practical calculator programs. Part 11 (Conclusion)
Journal Article
·
· Oil Gas J.; (United States)
OSTI ID:5647929
For proper well control, the drilling engineer must maintain a bottomhole pressure (BHP) slightly higher than the formation pressure while circulating the formation fluids from the well and the kill mud into the well. Because direct BHP measurements are impossible at that point, BHP must be inferred by monitoring the circulating drill-pipe pressure and counting the pump strokes needed to increase the existing-mud density up to the kill-mud density. After calculating the (1) required kill-mud density, (2) final circulating drill-pipe pressure, and (3) final number of pump strokes needed for well control, this program (adaptable to the Tl-59 hand-held calculator) provides a schedule of circulating drill-pipe pressure versus the number of pump strokes at intermediate intervals as mud density is increased. Input data include initial mud density, pipe and hole dimensions, initial shut-in drill-pipe pressure, and the pump factor.
- OSTI ID:
- 5647929
- Journal Information:
- Oil Gas J.; (United States), Journal Name: Oil Gas J.; (United States) Vol. 79; ISSN OIGJA
- Country of Publication:
- United States
- Language:
- English
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