PT Parts Sentra Indomandiri is based in Balikpapan, East Kalimantan and supplies Drilling Services and Support to the Mining and Mineral Exploration companies in Indonesia. Working under the name PSI Drilling Services and Support the company continues to supply a full range of drilling and exploration services – from man portable exploration – Diamond Drilling – Reverse Circulation Drilling – Waterbore Drilling – Grade Control Drilling and Blasthole Drilling.