Drill string enclosure
US5191156A · kind A · utility
4Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1992 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Apr 14, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The drill string enclosure consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.