Delayed opening wellbore tubular port closure
US-8931565-B2 · Jan 13, 2015 · US
Toe circulation sub
US9920591B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9920591-B2 |
| Application number | US-201314382856-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 7, 2013 |
| Priority date | Mar 8, 2012 |
| Publication date | Mar 20, 2018 |
| Grant date | Mar 20, 2018 |
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- Title
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Abstract
Official abstract text for this publication.
A toe circulation sub for a wellbore liner, the toe circulation sub comprising: a body including a connection for connecting the body to a wellbore liner to define an inner facing portion open to an inner diameter of the liner and an outer facing portion open to an outer surface of the liner; a bore through the body from the inner facing portion to the outer facing portion; and, a ball seat in the bore formed to stop and seal with a ball to plug flow through the bore to close the toe circulation sub. The toe circulation sub is useful for methods and may be installed in a wellbore liner.
First claim
Opening claim text (preview).
I claim: 1. A toe circulation sub for a wellbore liner, the toe circulation sub comprising: a body with a central bore defining a flow path and a connection for connecting the toe circulation sub at a distal end of the wellbore liner; a piston structure in the body having an axially extending bore and a ball seat, wherein upon creation of pressure differential after landing of a ball in the ball seat, the piston structure is axially moveable in the body; and a ball retainer in…
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Frequently asked questions
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- What does patent US9920591B2 cover?
- A toe circulation sub for a wellbore liner, the toe circulation sub comprising: a body including a connection for connecting the body to a wellbore liner to define an inner facing portion open to an inner diameter of the liner and an outer facing portion open to an outer surface of the liner; a bore through the body from the inner facing portion to the outer facing portion; and, a ball seat in …
- Who is the assignee on this patent?
- Packers Plus Energy Serv Inc
- What technology area does this patent fall under?
- Primary CPC classification E21B17/14. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Mar 20 2018 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).