Replies to post #5056 on Zion Oil & Gas Inc (ZNOG)

[BlissBull]

Yes geopressure, I was wrong!... The other wells that will be drilled from this drilling pad will not be side-tracked from within this one... They will be using "deviation drilling" from completely separate (albeit nearby) wells...

"Several wells can be drilled from the same drilling pad using deviation drilling. The wells can be as close together as 10 ft (3 m). This leaves a significantly smaller footprint in environmentally sensitive areas. It also saves money by greatly decreasing the distance the drilling rig has to be moved before drilling each well. After the wells have been completed and put into production, the drilling pad is called a production pad and is often protected by a fence."
(Nontechnical Guide to PETROLEUM Geology, Exploration, Drilling & Production
Third Edition, Norman J. Hyne, Ph.D.)

[BlissBull]

Re: Casing program...

The 30" conductor has been set...

The 20" surface casing has been set...

A 13 3/8" intermediate casing string has been set...

A 9 5/8" intermediate casing string has not yet been set...

A 5 1/2" production casing string will be set when the well has reached "total depth" and coring and logging runs have been completed...

Production casing sometimes doubles as production tubing, but usually production tubing is installed inside the production casing (to facilitate "workovers" in the future).