Method for Enhancing Fiber Bridging
US-2015361322-A1 · Dec 17, 2015 · US
Rheology modifier for drilling and well treatment fluids
US9611418B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9611418-B2 |
| Application number | US-201314410964-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 20, 2013 |
| Priority date | Jun 25, 2012 |
| Publication date | Apr 4, 2017 |
| Grant date | Apr 4, 2017 |
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- Title
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Abstract
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Water in oil emulsion drilling and well treatment fluids comprising an ester of trimer fatty acids and polyoxyethyiene glycol, the polyoxyethyiene glycol having average molecular weight from about (150) to about (600) and the trimer acids having at least about 20% of carboxyl acid groups esterified, as rheology modifier.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for drilling or completing an oil or natural gas well employing a water in oil drilling fluid comprising introducing the water in oil drilling fluid into a well bore wherein the water in oil drilling fluid comprises: a continuous oil phase, an aqueous internal phase, and an ester of trimer fatty acids and polyoxyethylene glycol, and wherein the polyoxyethylene glycol has an average molecular weight from about 150 to about 600 and the trimer acids comprise at least about 20% of carboxyl acid groups esterified; and drilling or completing the oil or gas well. 2. The method for drilling or completing an oil or natural gas well of claim 1 wherein the ester is present at a concentration of from about 0.1 to about 10% by weight, based on the total weight of the fluid. 3. The method for drilling or completing an oil or natural gas well of claim 2 wherein the ester of trimer fatty acids and polyoxyethylene glycol has an average molecular weight from about 150 to about 250. 4. The method for drilling or completing an oil or natural gas well of claim 2 wherein the trimer acids have from about 25% to about 50% of carboxyl acid groups esterified. 5. The method for drilling or completing an oil or natural gas well of claim 1 wherein the water in oil drilling fluid comprises from about 50 to about 98% by weight of continuous oil phase and from 2 to 50% of internal aqueous phase. 6. A method for treating an oil or natural gas well employing a water in oil treatment fluid comprising introducing the water in oil treatment fluid into a well bore wherein the water in oil treatment fluid comprises: a continuous oil phase, an aqueous internal phase, and an ester of trimer fatty acids and polyoxyethylene glycol, and wherein the polyoxyethylene glycol has an average molecular weight from about 150 to about 600 and the trimer acids comprise at least about 20% of carboxyl acid groups esterified. 7. The method for treating an oil or natural gas well of claim 6 wherein the ester is present at a concentration of from about 0.1 to about 10% by weight, based on the total weight of the fluid. 8. The method for treating an oil or natural gas well of claim 7 wherein the ester of trimer fatty acids and polyoxyethylene glycol has an average molecular weight from about 150 to about 250. 9. The method for treating an oil or natural gas well of claim 7 wherein the trimer acids have from about 25% to about 50% of carboxyl acid groups esterified. 10. The method for treating an oil or natural gas well of claim 6 wherein the water in oil drilling fluid comprises from about 50 to about 98% by weight of continuous oil phase and from 2 to 50% of internal aqueous phase. 11. The method for treating an oil or natural gas well of claim 6 wherein the treatment fluid is employed in operations selected from the group consisting of: work-over, milling, stimulation, fracturing, spotting, cementing, and combinations thereof.
Assignees
Inventors
Classifications
Spotting, i.e. using additives for releasing a stuck drill · CPC title
Oil-based compositions (C09K8/64 takes precedence) · CPC title
Oil-based compositions · CPC title
Oil-based compositions · CPC title
- C09K8/36Primary
Water-in-oil emulsions · CPC title
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- What does patent US9611418B2 cover?
- Water in oil emulsion drilling and well treatment fluids comprising an ester of trimer fatty acids and polyoxyethyiene glycol, the polyoxyethyiene glycol having average molecular weight from about (150) to about (600) and the trimer acids having at least about 20% of carboxyl acid groups esterified, as rheology modifier.
- Who is the assignee on this patent?
- Lamberti Spa
- What technology area does this patent fall under?
- Primary CPC classification C09K8/36. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 04 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).