Well treatment fluid material and well treatment fluid comprising the same
US-2015361326-A1 · Dec 17, 2015 · US
Delayed gelling agents
US9850425B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9850425-B2 |
| Application number | US-201113156929-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 9, 2011 |
| Priority date | Aug 11, 2010 |
| Publication date | Dec 26, 2017 |
| Grant date | Dec 26, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The invention is directed to delayed gelation agents comprising a degradable polymeric cage containing therein one or more gelation agents. The cage degrades in situ, e.g, in an oil reservoir, thus releasing the gelation agent(s), which can then crosslink second polymers in situ to form a gel.
First claim
Opening claim text (preview).
What is claimed is: 1. A delayed gelation composition, comprising a degradable polymeric cage, and having within said cage a gelation agent, wherein said polymer comprises one or more monomers and is crosslinked with a labile crosslinker to form said degradable polymeric cage, wherein the monomer comprises sodium AMPS and the labile crosslinker comprises a polyethylene glycol diacrylate and the gelation agent comprises chromium and polyethyleneimine. 2. The composition of claim 1 , wherein the labile crosslinker is an acid labile ketal of the formula: where wherein n and m are independently an integer of between 1 and 10, Y is a lower alkyl, and wherein R1 and R2 are independently a lower alkyl. 3. The composition of claim 1 , wherein the labile crosslinker is 2-bis[2,2′-di(N-vinylformamido)ethoxy]propane or 2-(N-vinylformamido)ethyl ether. 4. A method of making the composition of claim 1 , comprising a) mixing said sodium AMPS monomer and an initiator and said labile crosslinker and said gelation agent, to form a degradable polymeric cage containing said gelation agent; or b) mixing said polymer and said crosslinker and said gelation agent, to form a degradable polymeric cage containing said gelation agent, wherein said labile crosslinker comprises a polyethylene glycol diacrylate and said gelation agent comprises chromium and polyethyleneimine.
Assignees
Inventors
Classifications
- C09K8/588Primary
characterised by the use of specific polymers {(polymeric surfactants C09K8/584)} · CPC title
characterised by their form or by the form of their components, e.g. encapsulated material (C09K8/70 takes precedence) · CPC title
- C09K8/88Primary
macromolecular compounds · CPC title
- C09K8/887Primary
containing cross-linking agents · CPC title
Plastering the borehole wall; Injecting into the formation · CPC title
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Frequently asked questions
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- What does patent US9850425B2 cover?
- The invention is directed to delayed gelation agents comprising a degradable polymeric cage containing therein one or more gelation agents. The cage degrades in situ, e.g, in an oil reservoir, thus releasing the gelation agent(s), which can then crosslink second polymers in situ to form a gel.
- Who is the assignee on this patent?
- Guan Huili, Berkland Cory, Moradi-Araghi Ahmad, and 9 more
- What technology area does this patent fall under?
- Primary CPC classification C09K8/588. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 26 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).