Snap-lock bushing for prepacked screens
US7735553B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2007 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Feb 11, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/082
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A snap-lock bushing is provided for use with prepacked screens for monitoring wells. The bushing has an inner bore for sliding over a tubular well casing member and a raised lip protruding from the inner bore for engaging corresponding grooves at each end of the well casing member. The raised lip includes a plurality of lip segments with gaps or slots formed between the lip segments, which allow the raised lip to flex outward during assembly. A prepacked screen is assembled using a snap-lock bushing at each end of the well casing member. A mesh screen is placed in a concentric relationship around the well casing member with the ends of the mesh screen secured over the outer cylindrical surfaces of the bushings. A filter pack of granular material is placed in the concentric space between the well casing member and the screen member during assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.