Abstract: This paper presents the geologic conditions of thesurface layers in Baolang oilfield and the load distributionin producers, and focuses on the principle, the basis fortheoretical calculation, the operation techniques and fieldapplication of the two predrilling construction methodsof"Siltage jet agitating pile" and"Calcium lime pile"These two construction methods have the advantages ofsimple technique, high construction speed and low costcompared with the existing Sunken pipe casting method.Notable economic benefits have been achieved in fieldapplication and they have a bright future in applicationand dissemination.