Zion Oil & Gas Inc (ZNOG)

[BlissBull]

Re: "Liner hanger"... Here's a more detailed answer...

Expandable Casing and Liner

Expandable casing or liner is run in a well, then its diameter is permanently enlarged up to 30% by hydraulically pumping an expander plug through it. Elastomer can be bonded to the outside of the casing to form a seal. It is used to reduce the tapering effect of the diameter of casing and liner strings becoming smaller and smaller as they go deeper into a well. Expandable casing can also be used to isolate water, fracture, lost circulation, and sloughing shale zones.

Expandable casing and liners have been used for the construction of monobore wells. A monobore well has casing that is very similar in diameter from the top to the bottom of the well. A problem with deep wells and long deviated or horizontal wells is that the casing becomes smaller and smaller with depth. A monobore well eliminates that problem by allowing a larger diameter production tubing string and higher production rates.

A "tubingless completion," used on very high-volume wells, brings the produced fluids up the casing string without using tubing!

Nontechnical Guide to PETROLEUM Geology, Exploration, Drilling & Production
Third Edition, Norman J. Hyne, Ph.D.