While drilling a well cuts through the rock formations ... and screwed together to form longer lengths of casing, called casing strings. Each end of the casing joint has male threads that are ...

Acoustic Logging While Drilling (LWD ... more realistic channel model that accounts for the interaction between drill-string waves and fluid waves in the borehole, researchers have identified ...

In performing the gas injection via parasite string, a second pipe is run outside of the intermediate casing. While the cost of drilling increases, as does the time it takes, this technique ...