18 July 2017
The difference between the formation pressure at the bottom of the well and the hydrostatic pressure in the drillpipe. Recorded when a well is shut in […]
18 July 2017
A coring technique in which core samples are obtained from the hole wall in a zone that has already been drilled. A hollow bullet is fired […]
25 July 2017
Wedge-shaped pieces of metal with serrated inserts (dies) or other gripping elements, such as serrated buttons, that suspend the drill pipe or drill collars in the […]