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US-2024352305-A1 · Oct 24, 2024 · US
Sealing by ball sealers
US8936085B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8936085-B2 |
| Application number | US-10304108-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 15, 2008 |
| Priority date | Apr 15, 2008 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
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Abstract
Official abstract text for this publication.
In downhole treatments in the oilfield, ball sealers seated in perforations may not fully seal and may leak fluid through gaps and asperities between the balls and the perforations. A method is given for improving the sealing of ball sealers in perforations by adding a sealing agent that forms a plug in the gaps and severely restricts or eliminates fluid flow. The sealing agent is preferably degradable or soluble, malleable fibers slightly larger than the gaps. Optionally, the particles may be non-degradable, rigid, of different shapes, and smaller than the gaps but able to bridge them. Mixtures of sealing agents may be used. The sealing agent may be added with the ball sealers, after the ball sealers, or both.
First claim
Opening claim text (preview).
Having thus described our invention, we claim: 1. A method for sealing holes in a casing in a cased well penetrating a subterranean formation, comprising: injecting ball sealers and a separate sealing agent comprising particles into the casing of the cased well so as to form a plug including a combination of a ball sealer and particles that inhibit fluid flow through a hole in the casing in which the ball sealer is seated, wherein the particles comprise fibers having a length from…
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Classifications
- E21B33/138Primary
Fixed Constructions · mapped topic
- E21B33/13Primary
Fixed Constructions · mapped topic
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Frequently asked questions
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- What does patent US8936085B2 cover?
- In downhole treatments in the oilfield, ball sealers seated in perforations may not fully seal and may leak fluid through gaps and asperities between the balls and the perforations. A method is given for improving the sealing of ball sealers in perforations by adding a sealing agent that forms a plug in the gaps and severely restricts or eliminates fluid flow. The sealing agent is preferably de…
- Who is the assignee on this patent?
- Boney Curtis L, Swaren Jason, Lassek John, and 6 more
- What technology area does this patent fall under?
- Primary CPC classification E21B33/138. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Jan 20 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).