At these BHP Biliton projects, our company achieved high-quality drilling results with the highest achievement of HQ size and also succeeded in operating bulk sampling drilling of 6 inch core with the record core recovery achievement of 95% to 100%.

The project is located into three main sites :

1. MARUWAI COAL

PT. Dunggio Drilling is responsible for six Drilling Rigs :

• 3 Rigs Longyear 38, and
• 3 Drilling Rigs Jacro

2. LAHAI COAL

PT. Dunggio Drilling is responsible for five Drilling Rigs :

• 2 Rigs Jacro 175
• 1 Rig Jacro 200
• 1 Rig Longyear 44
• 1 Rig Longyear 38

3. KALTENG COAL

The project comprise of four mine sites:

• Senakin Mine Site (South Kalimantan)
• Mulia, Asam – Asam Mine Site (South Kalimantan). PT. Dunggio Drilling succeeded to achieve high standard drilling depth result of approximately 300 meter HQ on sandy soil from surface to bottom. Most drilling contractors are unwilling to drill at the site, but our company was successful and proven that it is not impossible
• Satui Mine Site (South Kalimantan)
• Batulicin Mine Site (South Kalimantan)

On these projects PT. Dunggio Drilling operated eight Unit Rigs at different mining sites and drilled to a depth of over 47.000 meter in total.

PT. Dunggio Drilling worked for six months, from February 2008 to August 2008, and operated two Unit Rigs Longyear 38 & Longyear 44. We drilled to a depth of over 6000 meters in total.

PT. Dunggio Drilling worked from November 2007 to April 2008 and employed one unit Longyear 38 which was operated in two shifts for five months and drilled to a total depth of 4,500 meters in total, as targeted.

PT. Dunggio Drilling worked from February 2009 and employed five units of Jacro 175, one unit Jacro 200 and one unit RB37.

This project located at Tanah grogot and has been being undertaken by Diamond Core Drilling (Wire Line System). On this project, PT. Dunggio Drilling has been operating 2 Rig Edson 200 started from April 2009.

Dunggio Drilling working with one unit Jacro 175 Single Rod, drilling for each hole depth up to 130m HQ size with Gravels Formations all the way to the bottom mixed with Soil Loose formations without leaving one single rod or bit down the hole.