Time has proven that care and maintenance of the drill pipe and joints can pay off , not just in a lower cost per foot for the ... A new string of drill collars should give many months of trouble-free service, but they can be ruined on the first trip down ... The positive effect of a professional drill collar or pipe maintenance program obviously has more impact on the deep well ... a normal drilling operation: ac Deliver full torque of the rig (top drive or table drive) to the bit continuously while drilling.
|Title||:||Air drilling handbook|
|Author||:||H. Van Ormer|