Publications

Each drilling well pad is supported with a Rig Sub Structure (RSS) in Sumatera Light North. This RSS is installed to improve the bearing capacity of the well pad to support heavy loads during the drilling activity. The common load of the drilling rig itself is around 50-200 tons which is difficult to support by using a soil foundation. The load can go up to 200 tons when performing “fishing” activity. The fact that the structural material can be reused introduces extreme cost saving. Data shows that a 50% cost saving (US$ 20 M/well) is achieved by using screw piling technology for RSS installation. In Indonesia, soil conditions are mostly not supportive to heavy loads especially for heavy loads during drilling activity. Bearing capacity of the soil and the water content are quite high in Indonesia, making it difficult to resist drilling loads without any additional structure support. This RSS is a temporary structure that is used only during the drilling work. Once the drilling activity is finished, the top structure can be dismantled but the piling foundation is left underground. Screw piling is the best practice for any temporary pile foundation. It is faster and safer in installation because instead of using a drop hammer (high vibration), the execution of this Screw piling uses smaller equipment (only using an excavator) and is more environmentally friendly because no pilings are left underground. Not leaving any material on site after completing drilling is an important value to assure our future environment.