Shale-gas wells are constructed of a series of steel casing strings (i.e., long sections of steel pipe) of various diameters that are installed concentrically within the wellbore, in a telescoping fashion.
A series of interconnected pipes, the casing is analogous to a telescope, with a wide end at the surface that narrows as each additional pipe goes through the bore, penetrating into the geology below.
To investigate the containment mechanism of the soft wall casing, a series of tests were conducted on a high-speed spin tester.
Once the smallest casing is fixed, other series of casing size and hole sizes can be determined.
In the weeks and hours leading up to the Deepwater Horizon disaster, engineers were compelled to make a series of decisions: what sort of well-casing to use; how long to circulate and when to remove the heavy drilling fluid or "mud" from the hole; how to interpret various tests.
A rectangular single-cavity trapped vortex combustor (STVC) comprising casing and diffuser is designed, and a series of performance experiments are accomplished at atmospheric pressure.
A series of computer simulations are performed for jet formation and penetration into the casing wall as well as the surrounding rocks.
Within a series of investigations performed according to the experimental modal analysis natural frequencies of fan casing vibrations were specified.
A series of scrape holes stretched across a broad front, littered with the recent detritus of fighting men - bullet casings, empty soda bottles and the odd scrap of uniform.
