Synthesis of a cationic surfmer and its copolymers for enhanced oil recovery
US-2022025090-A1 · Jan 27, 2022 · US
Degradable friction reducer for hydraulic fracturing treatments
US12098327B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12098327-B2 |
| Application number | US-202318485934-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 12, 2023 |
| Priority date | Aug 11, 2021 |
| Publication date | Sep 24, 2024 |
| Grant date | Sep 24, 2024 |
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- Title
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Abstract
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A polyacrylamide friction reducer wherein the friction reducer contains surfactant functional groups, and wherein the polyacrylamide friction reducer is degradable, can be used for multi-functional, slickwater fracturing fluid projects. Under downhole conditions, the polymer degrades and releases the surfactant molecules to act as oil displacing agent to provide additional stimulation.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of making a polyacrylamide friction reducer comprising: mixing a 50% acrylamide, acrylic acid, NaOH, one or more surfmers, and water together to form a solution; adjusting a pH to between about 5.5 and 7.0; purging the solution with nitrogen and agitating the solution; adjusting a temperature of the solution to between about 15-30 degrees Celsius; and adding one or more initiators to react the solution into the friction reducer. 2. The method of claim 1 further comprising sodium persulfate, sodium metabisulfite, V-50, or MEHQ. 3. The method of claim 2 where the sodium persulfate, sodium metabisulfite, V-50, or MEHQ are added at concentrations up to about 1 wt %. 4. The method of claim 1 wherein the solution is agitated for at least 30 minutes. 5. The method of claim 1 wherein the acrylamide is present at about 25-40 wt %. 6. The method of claim 1 wherein the solution further comprises AMPS or NaAMPS. 7. The method of claim 1 wherein the water is present at about 30-60 wt %. 8. The method of claim 1 wherein the one or more surfmers is present at about 1-10 wt %.
Assignees
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Classifications
by forming crevices or fractures · CPC title
Friction or drag reducing additives · CPC title
macromolecular compounds · CPC title
- C09K8/68Primary
containing organic compounds · CPC title
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Frequently asked questions
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- What does patent US12098327B2 cover?
- A polyacrylamide friction reducer wherein the friction reducer contains surfactant functional groups, and wherein the polyacrylamide friction reducer is degradable, can be used for multi-functional, slickwater fracturing fluid projects. Under downhole conditions, the polymer degrades and releases the surfactant molecules to act as oil displacing agent to provide additional stimulation.
- Who is the assignee on this patent?
- Cnpc Usa Corp, Beijing Huamei Inc, China Nat Petroleum Corp
- What technology area does this patent fall under?
- Primary CPC classification C09K8/68. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 24 2024 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).