Schlumberger

Brochure: TDDirect Casing-Drilling and Liner-Drilling Technology

Date: 7/24/2013

Well construction without dedicated casing runs

TDDirect casing-drilling and liner-drilling technology delivers a superior wellbore by casing and isolating the formation while drilling. Each foot of borehole is drilled and cased off simultaneously, eliminating the need for separate casing or liner runs. When TD is reached, the borehole is ready for cementing.

This simplified drilling process promotes safer operations by requiring fewer people on the rig floor and less pipe handling than conventional drilling. Plus, with casing constantly on bottom, the potential for NPT due to wellbore instability is reduced.

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