Float valve sub
US-2018209245-A1 · Jul 26, 2018 · US
Up-hole bushing and core barrel head assembly comprising same
US9528337B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9528337-B2 |
| Application number | US-201313803820-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 14, 2013 |
| Priority date | Oct 7, 2009 |
| Publication date | Dec 27, 2016 |
| Grant date | Dec 27, 2016 |
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Abstract
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A bushing for positioning within a core barrel assembly during an up-hole drilling operation. The bushing has a wall with an inner surface and an outer surface. The inner surface defines an inlet, an outlet, and a central bore of the bushing. The central bore surrounds a longitudinal axis of the bushing and extends between the inlet and the outlet. The outer surface has a first portion positioned proximate the inlet and a second portion positioned proximate the outlet. The first portion of the outer surface of the wall projects outwardly from the second portion of the outer surface relative to the longitudinal axis of the bushing such that the first portion of the outer surface defines opposed first and second shoulder surfaces extending substantially perpendicularly relative to the longitudinal axis. Core barrel head assemblies including such bushings are also described.
First claim
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What is claimed is: 1. A valve assembly for positioning within a core barrel assembly during an up-hole drilling operation, the valve assembly comprising: a bushing having a longitudinal axis and a wall, the wall having an inner surface and an outer surface, the inner surface defining an inlet, an outlet, and a central bore of the bushing, the central bore surrounding the longitudinal axis and extending between the inlet and the outlet of the bushing, the outer surface having a fi…
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Frequently asked questions
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- What does patent US9528337B2 cover?
- A bushing for positioning within a core barrel assembly during an up-hole drilling operation. The bushing has a wall with an inner surface and an outer surface. The inner surface defines an inlet, an outlet, and a central bore of the bushing. The central bore surrounds a longitudinal axis of the bushing and extends between the inlet and the outlet. The outer surface has a first portion position…
- Who is the assignee on this patent?
- Longyear Tm Inc
- What technology area does this patent fall under?
- Primary CPC classification E21B25/02. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Dec 27 2016 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).