Drill pipe screens
US9677361B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 24, 2014 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Feb 9, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/002
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention includes drill pipe screens and related methods that provide reliable long-term filtering of drilling fluids used to operate alternator turbines that are used to provide power in measurement while drilling (MWD) systems without allowing debris to pass through the screens to the turbines, and without causing intermittent pressure spikes at times when the screens are not completely clogged while maintaining desired circulation rates of drilling fluids. Embodiments of the invention include cylindrical bodies having alternating sets of elongated slots and peripheral ports located thereon to provide filtering of and relief to drilling fluids under pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.