Downhole tool protection during wellbore cementing
US9803430B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2014 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Apr 2, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A casing mandrel includes a body having a first end and a second end, the first end being configured to be coupled to an upper portion of a casing string and the second end being configured to be coupled to a lower portion of the casing string, a downhole tool operatively coupled to an outer surface of the body, a tool port defined in the body and extending between the downhole tool and an interior of the body and thereby placing the downhole tool in fluid communication with the interior of the body, and at least one degradable plug disposed within the tool port to prevent wellbore debris from obstructing fluid communication between the interior and the downhole tool, wherein the degradable plug degrades over time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.