what's casing while drilling

[ahmed abou zena]

hi every one after my request about material speaking about this title , and no one replied to me hhh so ,i wanna any one reply to me about the meaning or information about it plz
thanks so much

[arturo82]

It is also known as CDS (Casing Drilling System), makes the oil drilling and casing running at the same time

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[Kay-Kay]

Casing while drilling is a system of drilling where oil field casig is used to transmit rotory Torque and hydrauli energy instead of a drill pipe.
That is, the casing performs all the functions of a dril pipe and it eliminates the need for a drill pipe.
Upon reaching casing setting depth the casing is cemented in place.
this system saves time and is safer.