1. Reasons for Using Cementing Plugs Remove mud sheath Separate cement and Mud Prevent over displacement Surface indication Pressure test casing

2. Five Wiper Cementing Plugs Available with: –aluminum inserts –plastic inserts –non-rotating (NR) plastic inserts 350 psi rupture diaphragm in bottom plugs Surface release or sub- surface release (SSR) Compatible with water-based or oil-based muds

3. NR Cement Plug System Reduces drillout time PDC drillable 350 psi rupture diaphragm Use with NR float collar All plastic inserts

4. Top & Bottom Plugs with NR Float Collar

5. NR Cement Plugs Cementing in process Cementing complete Ready for drillout

6. Pumping Cement without Cement Plugs Much cement contamination No surface indication of cement placement Displacement fluid Cement Casing Mud sheath Drilling mud

7. Pumping Cement with Top Plug Only Top plug wipes mud sheath from casing ID Separates cement from displacement fluid Surface indication when cement placement is complete Require additional shoe track length Casing Top plug Accumulated mud Mud sheath Drilling mud

8. Accumulated Mud Volume Ahead of Cement Plug Fill up per 1,000 ft. casing

9. Pumping Cement with Top & Bottom Plugs Preferred method Bottom plug wipes mud sheath from casing ID Surface indication when cement placement is complete Maximum cement/mud separation Displacement fluid Top plug Accumulated mud Casing Drilling mud Cement Bottom plug

10. Polycrystalline Diamond Compact Bits (PDC) Soft – medium formations Improves rate of penetrate (ROP) Longer service life

11. Concave PDC Bit

12. Illustrates aggressive nature of PDC bits