Construction Technology of Directional Butting Connection for Salt Well

Abstract:

The paper introduced ZJ02-PJ02 butted wells of Xinwen Mining Group, the designed depth of the shaft and the inclined well were 94112m and 120300m, and these two wells was 25200m apart. The designed well structure was trisected with drilling and angle building equipment rationally installed. Tower-type pendulum drilling-assembly was used to prevent well deviation. Drilling pressure, drilling ratio, pumping volume and drilling fluid were selected according to the different situation in different well section, highprecision PST MWD and minimum curvature method were applied to calculate the drilling trajectory to guarantee the butting of two wells.