Design and application of a PDC bit used in Nanliang area of Changqing oilfield

Complex lithology,interbedded stratums,long offsetting and slide drilling,economical are the difficulty of Nanliang Area.A kind of speedily,superior directional performance,repeated reconditioned PDC bit is the key of raising the exploitation efficiency of the area.On the base of the equal cutting rule,stability rule and other newly design methods,and the practical drilling require,we adjust and correct the bit design on partial cogging density,cogging angle,stability and directivity.The new bit is superior to other kind of bit used in this area on speed,directivity,and many other property,which is worth of popularization.