Drilling Fluids losses - LCM in Non Reservoir Section
If lost circulation is expected, the following recommendations should be followed:
- Nozzles of minimum 18/32in shall be used. As a rule-of-thumb, bit nozzles must be three times larger than the largest particle size of LCM, in order to reduce the possibility of blocking. If smaller nozzles are necessary a circulating sub shall be incorporated into the string.
- Sufficient stocks of mud chemicals, LCM (fine, medium) and whole mud shall be maintained on site to cope with anticipated losses when drilling potential loss circulation . . .
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