Welded particle control screen assemblies
US6514408B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 2000 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | May 30, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/084
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a particle or sand screen control assembly for mounting on a base pipe used in a well, a sealing strip preferably in the form of a metal strip is used in a weld joint that joins the metal mesh screen of filter media to a solid metal structure or “safe edge”. The sealing strip covers the pores in the screen proximate the metal structure to which it is welded. The sealing strip is a separate thin sheet of metal that is compatible with the welding metal used in the weld joint, such that the sealing strip becomes unitary with the weld joint. Prior to welding, the sealing strip may be bent around the screen if desired, or may lie flat along the top or bottom surface of the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.