Abstract:

The paper calculated curve intensity of wells when increases and decreases the angle of well and outlined the factors affected the choice of curve intensity in the construction of directional wells. On that basis, resonable curve intensity of directional wells is calculated. This is the value to ensure that the casing structure and is the upper limit value of curve intensity for sidetrack. The re-sults presents that, for the diameter bit ≥ 311.1mm curve intensity should be  0.60/10m, for the di-ameter bit < 311.1mm curve intensity should be proposed between 0.7 and 1.50/10m.