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Description
Best practices to mitigate corrosion in drilling and completion operations
Mitigation in drilling operations
While tripping:
- Use a wiper rubber while tripping out of hole.
- Keep the racking area clean (free of well fluid and solids).
- Apply thread compound to connections.
When laying pipe down:
- Clean the inside and outside of pipe.
- Clean thread protectors before putting them back on connections.
- Clean and dope connections before putting thread protectors back on.
Corrosion rings can be used with API connections seating in the box tapered section. Double-shouldered connections leave no space for corrosion rings to seat on. A special tool (double sub) needs to be built to hold the ring.
Mitigation in completion operations
While tripping the completion string:
- Use a wiper rubber while tripping out of hole.
- Wash the pipe on every trip out.
- Clean, dry, and dope pins and boxes before racking.
- Use a rubber racking mat to prevent accumulation of completion fluid around pins.
A sufficient amount of dope should be applied when running completion. Completion fluids are generally more corrosive than drilling fluids.
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