Rod insertion method and friction reducing device
US5265466A · kind A · utility
2Cited by
5References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Mar 3, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a friction reducing device for an elongate member. The device comprises a friction reducing sleeve removably positionable on a first longitudinal segment of the elongate member. The present invention also provides a method of inserting an elongate assembly into the ground. The method comprises the step of incorporating the inventive friction reducing device in the elongate assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.