Process for placing a piling in the ground, a drilling machine and an arrangement for implementing this process
US4904119A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1987 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Oct 19, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/208
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention is a method for installing a piling of a predetermined target depth in the ground, particularly on the ocean floor. A pipe is lowered into the ground together with a drilling machine having rotatable cutters movable from a first position in which their transverse dimension is less the inner diameter of the pipe to a second position in which their transverse dimension is greater than the outer diameter of the pipe. The cutters are lowered to a location below the pipe, moved to the second position, and rotated to drill a hole having a diameter larger than the outer diameter of the pipe. After the cutters are retracted and the drilling machine is raised back within the pipe, the pipe and drilling machine are lowered to the bottom of the hole. The steps are repeated until the total target depth is reached. The drilling machine is then removed and the anular space between the wall of the hole and the exterior surface of the pipe is filled with cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.