Corrosion Control

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.