Method and apparatus for laying pipes in the ground
US4024721A · kind A · utility
32Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1975 |
| Grant date | May 24, 1977 |
| Priority date | — |
| Expiry date | Dec 22, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/203
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
There is disclosed a method and apparatus for laying small-diameter gas, water pipes or the like precisely in the ground. Small-diameter pilot pipes are first laid in while at the same time, a pilot head is measured and controlled to make its straight advance. Pipes of a larger diameter are then laid in successively, the pipes being led by the pilot pipes. Concurrent with this, excavated earth is discharged through the laid-in pilot pipes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.