Method of laying pipe underground and system therefor
US4403890A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1982 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Mar 5, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of and a system for laying a pipe underground wherein a head attached to the leading end of the pipe to be laid underground is caused to move in vibratory movement while a propelling force is exerted on the rear end of the pipe to obtain penetration of the earth by the pipe. While the head is forced to move ahead by the propelling force exerted on the rear end of the pipe, the vibration of the head is measured. When the vibration drops in magnitude, the propelling force is decreased to reduce the speed at which the head is forced to move ahead; so as to cause restoration of the vibration to the original level, and when the vibration rises, the propelling force is increased to increase the speed at which the head is forced to move ahead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.