The interval of first intermediated casing Ø340 mm was drilled in less than a month. Drilling was conducted without complications. The casing was running with one section and successfully cemented. Well construction is carried out by Croatian company Crosco. After drilling a cement and casing attachments, drilling fluid will be changed to a polymer-inhibited drilling mud PIDM.
PARAMETERS OF DRILLING MUD BEFOR CASING RUNNING:
- Density – 1,18 g/сm3;
- Funnel Viscosity – 50 sec;
- Gel – 91/144 dPa;
- PV – 13 cP;
- YP – 125 dPa;
- Filter Loss – 7,4 ml/30 min;
- рН – 8,9.
