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Precipitation prevention in produced water containing hydrate inhibitors injected downhole
US8980798B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8980798-B2 |
| Application number | US-201113053497-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 22, 2011 |
| Priority date | Mar 31, 2010 |
| Publication date | Mar 17, 2015 |
| Grant date | Mar 17, 2015 |
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Abstract
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The precipitation of polymeric kinetic hydrate inhibitors (KHIs) in stored produced water is prevented or inhibited by incorporating a water immiscible solvent therein having a polarity index greater than about 3. The polymeric KHIs whose precipitation is inhibited or prevented include, but are not limited to, hyperbranched molecules, polyvinylcaprolactam, polyvinylpyrrolidone, and the like. Suitable water immiscible solvents include, but are not necessarily limited to, xylene, toluene, kerosene, mineral spirits, trimethylbenzene, cumene, heavy aromatic naphtha, ethylbenzene, polyethylbenzene, naphthalene, and mixtures thereof.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for inhibiting the precipitation of a polymeric kinetic hydrate inhibitor (KHI) from an aqueous composition containing water and at least one polymeric KHI comprising contacting the aqueous composition with a water immiscible solvent having a polarity index greater than about 3 in an amount effective to inhibit the precipitation of the polymeric KHI, where the polymeric KHI is selected from the group consisting of polyvinylcaprolactam, polyvinylpyrr…
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- C08L77/12Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8980798B2 cover?
- The precipitation of polymeric kinetic hydrate inhibitors (KHIs) in stored produced water is prevented or inhibited by incorporating a water immiscible solvent therein having a polarity index greater than about 3. The polymeric KHIs whose precipitation is inhibited or prevented include, but are not limited to, hyperbranched molecules, polyvinylcaprolactam, polyvinylpyrrolidone, and the like. Su…
- Who is the assignee on this patent?
- Tian Jun, Bailey Cheryl R, Baker Hughes Inc
- What technology area does this patent fall under?
- Primary CPC classification C08L77/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 17 2015 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).