φ178 mm减震器在东北工区的试验应用

东北工区松辽盆地东南隆起的地层多为中生界白垩系地层。登娄库组中上部以上地层可钻性好,机械钻速高;登娄库组中部以下地层可钻性逐渐变差,砂岩致密,泥岩坚硬,钻进中跳钻特别频繁并且严重,转盘转速越高跳钻越严重,对钻头、钻具、设备等使用影响很大。通过试验使用减震器,减小了跳钻的影响,机械钻速平均提高了21%,钻井周期平均缩短了1.27天,使钻井综合成本有了一定幅度的降低,并且大大减轻了对设备、钻具所产生的潜在危害和影响。

(Φ)178mm Shock Absorber in Northeast Working Area

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.