What are Drill pipe grades used in directional drilling
13 February 2016
Please, I want to ask a question about the grades of Drill pipes that are used inDirectional drilling regarding Short, medium & long radius.
Should we use premium or others.
For DLS....... It is really fatigue issue on rotating which does not matter on gade E, G, S etc. 6 degrees/30m max for 5", use 3 1/2" DP or less for higher DLS. smaller OD- less fatigue.
Thanks for your answer.
Just other thing, normally we should use pipes with great OD & good flexibility especially in high DLS. Am I correct
Ah, by the way, please if possible, what's the max deflection/deformation that can support pipe (S-135)
Have a good day,
Better be premium. You mean Grade E, G-105, S-135 on pipe which effects fatigue. Short answer without knowing more .S-135, but then you are also asking about torque capabilities of the threads, XT, HT etc. - get yourself a copy of TH Hill DH-1 online- any version , good reading.