Inorganic deposit inhibitors, in particular in oil wells,...

Details Inorganic deposit inhibitors, in particular in oil wells,... Inorganic deposit inhibitors, in particular in oil wells,...

2004-08-12

2008-05-27

Pezzuto, Helen L (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S286000, C210S698000

Reexamination Certificate

active

07378477

ABSTRACT:
The present invention concerns inorganic deposit inhibitors, and particularly of calcium carbonate and barium sulphate in oil wells. It also concerns certain copolymers particularly suitable for this application, particularly in high pressure/high temperature conditions (HP/HT).

REFERENCES:
patent: 4536292 (1985-08-01), Matz
patent: 4618448 (1986-10-01), Cha et al.
patent: 4680135 (1987-07-01), Cha et al.
patent: 5069286 (1991-12-01), Roensch et al.
patent: 5368830 (1994-11-01), Alfano et al.
patent: 5755972 (1998-05-01), Hann et al.

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