Method for Enhancing Fiber Bridging
US-2015361322-A1 · Dec 17, 2015 · US
Microsphere compositions and methods for production in oil-based drilling fluids
US11820934B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11820934-B2 |
| Application number | US-202016814035-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 10, 2020 |
| Priority date | Dec 7, 2015 |
| Publication date | Nov 21, 2023 |
| Grant date | Nov 21, 2023 |
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- Title
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Abstract
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A method includes admixing an aqueous polysaccharide solution into an oleaginous base fluid, and adding a divalent ion source to produce one or more polysaccharide microspheres.
First claim
Opening claim text (preview).
What is claimed is: 1. A method comprising: dispersing an aqueous polysaccharide solution into an oleaginous base fluid; and adding a divalent ion source to produce one or more polysaccharide microspheres within the oleaginous base fluid, wherein the oleaginous base fluid is an oil-based mud; and wherein the polysaccharide microspheres contain an oil-soluble additive; wherein the oil-soluble additive comprises crosslinking agents, rheological modifiers, a polymer-forming species, or a combination thereof. 2. The method of claim 1 , further comprising dispersing the oil-soluble additive within the aqueous polysaccharide solution prior to dispersing the aqueous polysaccharide solution into the oleaginous base fluid. 3. The method of claim 1 , wherein the crosslinking agent is mixed with the aqueous polysaccharide solution prior to dispersing the aqueous polysaccharide solution into the oleaginous base fluid. 4. The method of claim 1 , wherein the crosslinking agent is mixed with the aqueous polysaccharide solution after dispersing the aqueous polysaccharide solution into the oleaginous base fluid. 5. The method of claim 1 , wherein the aqueous polysaccharide solution contains a polysaccharide at a concentration of 1 to 8 weight percent of the aqueous solution. 6. The method of claim 1 , further comprising isolating the one or more polysaccharide microspheres and combining the isolated one or more polysaccharide microspheres with a wellbore fluid. 7. The method of claim 6 , wherein the wellbore fluid is an aqueous fluid or an oil-in-water emulsion. 8. The method of claim 6 , wherein the wellbore fluid is an oleaginous fluid or an invert emulsion. 9. The method of claim 1 , wherein the polysaccharide is alginate. 10. The method of claim 1 , wherein the adding the divalent ion source causes crosslinking of the polysaccharide in the aqueous polysaccharide solution. 11. The method of claim 1 , wherein the polymer-forming species are selected from a group of silicates and silylated polymers.
Assignees
Inventors
Classifications
- C09K8/36Primary
Water-in-oil emulsions · CPC title
- C09K8/035Primary
Organic additives · CPC title
Means for stopping loss of drilling fluid (plastering the borehole wall E21B33/138) · CPC title
Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride · CPC title
Hollow spheres · CPC title
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- What does patent US11820934B2 cover?
- A method includes admixing an aqueous polysaccharide solution into an oleaginous base fluid, and adding a divalent ion source to produce one or more polysaccharide microspheres.
- Who is the assignee on this patent?
- Schlumberger Norge As, Schlumberger Technology Corp
- 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 Nov 21 2023 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).