Application of degradable polymers in well fluids

Details Application of degradable polymers in well fluids Application of degradable polymers in well fluids

2007-05-18

2009-12-01

Kugel, Timothy J. (Department: 1796)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C166S305100, C166S308100, C166S308500, C507S903000, C507S923000, C507S925000, C507S926000

Reexamination Certificate

active

07625846

ABSTRACT:
Degradable polylactic or polyhydroxyalkanoate polymers may be used to viscosify aqueous fluids for use in wells. Sand control screen or liner can be coated with a solid degradable polymer during placement in a well. Mechanical changes or flow changes in a well can be caused by solid degradable polymer that changes physical properties after it is placed in a well. Parts of devices or entire devices can be made of solid degradable polymer that converts to a fluid after selected times in an aqueous environment in a well.

REFERENCES:
patent: 4716964 (1988-01-01), Erbstoesser et al.
patent: 7196040 (2007-03-01), Heath et al.
patent: 2008/0015120 (2008-01-01), Cooke
patent: 2008/0115932 (2008-05-01), Cooke
patent: 2009/0107684 (2009-04-01), Cooke, Jr.
patent: 2001/094744 (2007-12-01), None

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