drilling operations 2 min read
Annular Velocity (AV)
Annular Velocity (AV) is how fast of fluid in annulus while pumping. Three main factors affecting annular velocity are size of…
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Deviated Hole
What does Deviated Hole mean? A deviated hole is a wellbore that is inclined and it’s not in a vertical direction. Ideally,…
drilling operations 4 min read
Hole Cleaning
Hole cleaning can be a real problem when drilling deviated wells. It has been proved that for wellbores with an…
drilling operations 1 min read
Equivalent Circulating Density (ECD)
Equivalent Circulating Density (ECD) is the effective density that combines current mud density and annular pressure drop. ECD is vital for…
drilling operations 2 min read
Slow Circulation Rate (SCR)
Slow Circulation Rate is a circulation rate which will be used in well kill operation. Typically, slow circulation rate pressure (SCR)…
drilling operations 3 min read
Jet Optimization and Planning
For many years, engineers have known that hydraulics play an Important role in cleaning the face of the formation so…
drilling operations 2 min read
Hydraulic Rotary Drilling
Oil well drilling utilizes tri-cone roller, carbide embedded, fixed-cutter diamond, or diamond-impregnated drill bits to wear away at the cutting face.…
drilling operations 13 min read
Types of Fluids
In geotechnical engineering, drilling fluid is used to aid the drilling of boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling…
drilling operations 4 min read
Drilling hydraulics
The material in this section provides a straightforward explanation of what is covered by the broad term “hydraulics” along with…
drilling operations 13 min read
Drilling fluid types
There are several different types of drilling fluids, based on both their composition and use. The three key factors that…
drilling operations 6 min read
Air drilling
Air drilling—also known as pneumatic percussion drilling[1] —is an underbalanced drilling (UBD) technique in which gases, usually compressed air or nitrogen, are used…
drilling operations 2 min read
Drilling mud
Drilling mud, also called drilling fluid, in petroleum engineering, a heavy, viscous fluid mixture that is used in oil and gas drilling operations to…