Remedial second-stage cementing packer
US-9797219-B2 · Oct 24, 2017 · US
Apparatus for stage-cementing an oil well
US9038720B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9038720-B2 |
| Application number | US-201213622695-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 19, 2012 |
| Priority date | Dec 5, 2006 |
| Publication date | May 26, 2015 |
| Grant date | May 26, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
An apparatus for use in stage-cementing an oil well in the region of a lost-circulation zone that is proximate an annular space defined by the lower end of an outer casing surrounding an inner casing include a load-bearing annular steel plate of substantial thickness that is positioned on, and maintained stationary relative to the inner casing by supporting and retaining means secured to the inner casing, the outer diameter of the plate being less than the inside diameter of the outer casing so that the plate can be lowered with the inner casing string to the desired location inside of the outer casing and, with a layer of gravel, to provide a seal and support the cement poured into the annulus between the inner and outer casings.
First claim
Opening claim text (preview).
I claim: 1. An apparatus for use in stage-cementing a fluid production well in a region of a lost circulation zone that is proximate an annular space defined between a lower end of an outer casing surrounding an inner casing, the inner casing being formed by a cylindrical sidewall having an outer surface, the outer casing being formed by a cylindrical sidewall having an inner surface that has an inside diameter that is greater than the outside diameter of the inner casing, the appa…
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Fixed Constructions · mapped topic
- E21B33/146Primary
Fixed Constructions · mapped topic
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Frequently asked questions
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- What does patent US9038720B2 cover?
- An apparatus for use in stage-cementing an oil well in the region of a lost-circulation zone that is proximate an annular space defined by the lower end of an outer casing surrounding an inner casing include a load-bearing annular steel plate of substantial thickness that is positioned on, and maintained stationary relative to the inner casing by supporting and retaining means secured to the in…
- Who is the assignee on this patent?
- Saudi Arabian Oil Co
- What technology area does this patent fall under?
- Primary CPC classification E21B33/146. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue May 26 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).