With the policy of increasing domestic demand and stimulating economic growth promulgating, E Each province will start their municipal constructions. In June,2009, the Second-period project   of Changzhouo elevated highway was started, and now is keeping moving. Our rotary drilling rig SD28 series have been displaying their power in the project.

This project is constructed and cooperated by Changzhou urban construction bureau, Shanghai urban construction group and Shanghai GuoSheng group. The total investment is 6.3 billion Yuan. This highway is 28 km and will be playing the important role of Strategic Meaning. This project will be finished in Sep,2010, featuring pressed time, short construction period and high quality. So far, we have 5 bid sections constructed in 8 bid sections.

Our SD28 rigs have showed big power, high efficiency and good performance in the project and ensured the completion of the project on time. The strata situation is: 1-49m is cohesive soil, 49-52 is the quaternary old cohesive soil, this layer is hard, like plasticine, easy slippery, so it is low efficiency to use a common rigs; blow 55m, there are the composite strata with sand, cohesive soil and cobbles(4-5cm). Our SD28 rigs are installed with special drilling tools to drill a Dia 1.2m and 60m depth pile with 4 hours in the complicated strata, the efficiency and quality have exceed other similar products in this jobsite and fully showed our quality.