Drilling through formations with loose,unconsolidated material always comes with problems such as the bore hole cave-in collapse.How to avoid these problems? With years of field pratice and reserch,Teamwhole had developed its eccentric casing system application for strata with silt,sand or small size pebbles.With its simple struture,easy operation and reliable performace,this system can advance the casing easily for depth within 30 meters.And it's retrievable with long serive life.
Usually the land surface of the earth is covered with loose, unconsolidated material such as soil, clay, silt, sand, gravel and boulders, which varies in depth from a few centimeters to hundreds of meters.Use concentric system can drill this complex formation very well.The systems are available through the whole product range the smallest being for 114 mm (4 1/2") casing and largest size available at the moment is for 1220 mm (48") casing.
Make the casing follow easy and the equipment and operation simple, simple structure, easy operation, reliable quality, retrievable drilling tools ,and long service life.
The stable and reliable working performance and the less vibration of drill rig, concentric system with ring bits, wings and blocks.