ULTRADEEP HORIZONTAL WELL DRILLING TECHNOLOGY OF TK117H WITH NARROW TARGET WINDOW

In order to increase the rate of drilling and the precision of path control,engineering technology personnel combined with rotary drilling and slide drilling during drilling, and according to stratumtous rock characteristic and target window requirement,TK117H horizontal well was success fully drilled,and has good application result.This well measures difficulties including small target window,deep buried depth,bad stratigraphic stability,and easy adhere to pipe sticking.Casing program,well bore program design,well path control,survey technology, bit using and drilling fluid capability were introduced,can provide experience to similar well.