Useful URL

Very useful Glossary

http://www.inter-mountain.com/glossary.htm

http://www.inter-mountain.com/Pipe_Related_Formulas.htm
 

Acronyms

STC - Short Thread Case Coupling
LTC - Long Thread Case Coupling
BTC - Buttress Thread Case Coupling
EUE - External Upset End Tubing Coupling
NUE - Non-Upset End Tubing Coupling

Difference between Casing and Tubing

1. What is the difference between casing and tubing ?

Above 4-1/2 inch is called Casing.
Below 4-1/2 inch is called Tubing.
Both measured by Internal Diameter.

CASING-Is a large diameter pipe that is assembled and inserted into a recently drilled section of a borehole

TUBING - Small diameter pipe which is installed in the casing. Oil is produced through tubing because it increases the viscosity of fluid and a well's flow capabilities