since its my professional where i have been working for many years back in my country bhutan, i feel i will learn the difference of drilling technology. i would never ever leave the drilling professional which is unseen work but sense should read the contidition of the holes and the drilling machineries where required full concerntration.
Kontras
working in the harsh weather condition be it cold, hot or rainy. when the drill pipes drop in the hole. when drill can't go further and can not complete the task on time due to many factors. like fishing attempt fail and poor conditions or equipments.