1 MPD

Question 1

What are the 5 types of MPD Drivers?

Answer 1

1. CBHP
   -narrow margin well
   -well ballooning/breathing
   -uncertain pressure window
   -HPHT wells
   -wellbore instability
   -depleted/overbalance zones
2. PMCD
   - massive losses (carbonate)
3. UBD
   - avoiding formation damage
   - tight sandstone
   - reservoir characterisation
   - depleted/overbalance zones
4. CCS
   - avoid stuck pipe in drilling/connections
5. DGD
   - shallow sections in deepwater (very low FG)
   - for environmental protection
   - to control BHP (riser level management)

Question 2

What are the 5 MPD Variants?

Answer 2

1. CBHP
2. PMCD
3. CCS
4. DGD
5. UBD