Addax Petroleum (fka AXC)

[Julius Erving]

Kownski,

From Wiki:

The conductor casing serves as a support during drilling operations, to flowback returns during drilling and cementing of the surface casing, and to prevent collapse of the loose soil near the surface. It can normally vary from sizes such as 18" to 30".

"In order to reduce cost, a liner may be used which extends just above the shoe (bottom) of the previous casing interval and hung off downhole rather than at the surface. It may typically be 7", although many liners match the diameter of the production tubing."


From the ERHC website:

The Tarach-1 well is designed to drill from a 20-inch surface casing through intermediate casings down to 2,442 meters and set a seven-inch liner down to total depth (TD) of 3,000 meters.

Is it really more than just a test hole? Not that I doubt your expertise, but please elaborate.

The Doc.