What is Residual Saturation?
This is a sketch of an enhanced oil recovery technique. After primary methods, man goes ahead and tr…
The Evolution of Standard Oil
A time-line chart showing the history of the companies derived from the Standard Oil&…
Freeing Stuck Pipe
The three main causes of stuck pipe are cuttings and cavings, keyseats, and differential sticking. C…
Water-Based vs. Oil-Based Drilling Fluids.
These two types of drilling fluids have very different behavior. In recent years, the oil-based dril…
Fishing for Bit Cones, Tong Dies, and Small Tools
When the bit is on the bank and the small junk is in the hole, several choices present themselves. I…
Weatherford introduces new while drilling integrated wellbore pressure management system.
Weatherford has announced the commercial release of the PressurePro control system, a fully-integrat…
Wellbore stability problems
Wellbore instability is experienced mainly in shale sections, induced by either high stress concentr…
Drilling Elements That Affect Hole Cleaning
Critical elements that can affect hole cleaning include the following: • Hole angle of the int…
Largest oil spills
Oil spills at sea are generally much more damaging than those on land, since they can spread for hun…
The Well Tractor
In a horizontal or deviated well, gravity typically assists tools in angles up to 70º. Beyond t…