1. CROSCO Ltd.
DRILLING DEPARTMENT
CROATIA
NAT-402 RIG MANAGER
Mob. 00385 98 817 952
Fax Mess. Br. : 018/13-BB
Ivanić Grad, 23.12.2013.
Antonio Orešković
07.06.1991.
Subject: Confirmation letter for summer practise on land drilling rig National 402
Hereby we confirm that Mr. Antonio Orešković had summer practise on our 2000 HP land
drilling rig National 402.
During period 22.7.2013. -16.8. 2013. he was introduced with Crosco's safety rules and
introduced with drilling equipment and operations.
Short description of activities on drilling rig during his summer practise:
- WLL
- RIH csg liner 5 ½“
- Cement job
- N/U & N/D BOP
- N/U XMASS tree
- Rigging down
- Rig move
- Rigging up
- P/U DP 5“& BHA ( DC 9 ½“, HWDP 5“)
- Drilling phase 26“
- RIH csg 20“
Rig Manager:
Boško Babić, B.Sc.