Invention Grant
- Patent Title: Crosslinked swellable polymer
- Patent Title (中): 交联的可溶胀聚合物
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Application No.: US14100958Application Date: 2013-12-09
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Publication No.: US09139760B2Publication Date: 2015-09-22
- Inventor: Ahmad Moradi-Araghi , David R. Zornes , Riley B. Needham , James H. Hedges , Everett L. Johnston , Faye L. Scully
- Applicant: ConocoPhillips Company
- Applicant Address: US TX Houston
- Assignee: ConocoPhillips Company
- Current Assignee: ConocoPhillips Company
- Current Assignee Address: US TX Houston
- Agency: Boulware & Valoir
- Main IPC: C09K8/588
- IPC: C09K8/588 ; E21B43/16 ; C09D5/44

Abstract:
The invention is directed to stable crosslinked water-soluble swellable polymers, methods for making same, and their various uses in the hygiene and medical arts, gel electrophoresis, packaging, agriculture, the cable industry, information technology, in the food industry, papermaking, use as flocculation aids, and the like. More particularly, the invention relates to a composition comprising expandable polymeric microparticles having labile crosslinkers and stable crosslinkers, said microparticle mixed with a fluid and an unreacted tertiary crosslinker that is capable of further crosslinking the microparticle on degradation of the labile crosslinker so as to form a stable gel. A particularly important use is as an injection fluid in petroleum production, where the expandable polymeric particles are injected into a well and when the heat and/or pH of the well cause degradation of the labile crosslinker and when the particle expands, the tertiary crosslinker crosslinks the polymer to form a stable gel, thus diverting water to lower permeability regions and improving oil recovery.
Public/Granted literature
- US20140102707A1 CROSSLINKED SWELLABLE POLYMER Public/Granted day:2014-04-17
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