φ178mm Shock Absorber in Northeast Working Area

Abstract:

The southeast uplift formation of Songliao basin is mostly Mesozoic cretaceous with good drillability and high ROP in the upper formation of Denglouku but the drillability becomes poorer below the middle part with dense sandstone and hard mudstone. Serious and frequent drill jump were encountered in drilling construction, which is very harmful to the bits, drilling tools and equipments. By the test application of shock absorber, the influence of drill jump was reduced with 21% average ROP increase and the drilling cycle was reduced by an average 127 days. Integrated drilling costs have been reduced in a certain level and the potential harms and impacts to equipments and drilling tools were greatly reduced.