Changing a Bottom Hole Assembly
To avoid problems with under gauge hole and BHA changes it is important to ensure the following to reduce the riskof stuck pipe:
- bits and stabilisers shall always be gauged after each trip
- if the bit pulled is undergauge, the whole of the section drilled by that bit is reamed unless torque records clearly show the point at which the bit gauge became worn
- BHA’s of increased stiffness are not tripped into the hole rapidly - reaming is recommended
- if the hole is suspected to . . .