Casing with isolated annular space

Details Casing with isolated annular space Casing with isolated annular space

2007-12-04

2007-12-04

Neuder, William (Department: 3672)

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

C166S242100, C166S162000, C166S055100

Reexamination Certificate

active

10539676

ABSTRACT:
The invention is comprised of (see FIG.1) an inner pipe (2), and an outer pipe (3), and two end subs (1). An isolated circular hollowed space is contained in between these components. The isolated space can be used for transport of different medias down into the well, this can be vacuum, air, gas, acids, solids, tracers, or other well stimulating medias. The end subs (1) can be connected to the casing in the well and become an integrated part of the casing. The invention can be cemented on the outside like the casing can. The invention can be perforated after installed in the well.

REFERENCES:
patent: 2468902 (1949-05-01), Villiger
patent: 3155117 (1964-11-01), Spillmann
patent: 3511282 (1970-05-01), Martin et al.
patent: 5318128 (1994-06-01), Johnson et al.
patent: 5551513 (1996-09-01), Surles et al.
patent: 5595245 (1997-01-01), Scott, III
patent: 6116343 (2000-09-01), Petegem et al.
patent: 2002/0112854 (2002-08-01), Krueger et al.
patent: 2002/0185313 (2002-12-01), Jones et al.

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