Cable-tool drilling (Percussion Drilling)
Cable-tool drilling is a method of drilling in which a hole is made by the repeated blows generated…
Acid fracturing is a production stimulation technique in which acids, injected at high pressures, ar…
Mud Cake (Filter Cake)
Filter cake is formed when the insoluble solid portion of fluid slurry becomes deposited on a permea…
Hook load is the sum total of all the downward forces pulling on the hook. This hook is normally att…
Classification of drilling rig
There are many types and designs of drilling rigs, with many drilling rigs capable of switching or c…
FOSV: A manual valve usually installed on DP after a kick occurs when the kelly is not in use.
FOSV: A manual valve usually installed on DP after a kick occurs when the kelly is not in use. It us…
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…