Cable-tool casing hammer
US5765651A · kind A · utility
0Cited by
5References
4Claims
0Family size
Inventor
Key dates
| Filing date | Apr 10, 1997 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Apr 10, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B1/38
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A novel improvement in a tubular ram device for bi-directional driving of pipe casing, vertically or horizontally, wherein the driving hammer imparts the force to the pipe casing through a bowls-anvil and removable collet, thus allowing driving of sections of pipe casing without removing the tubular ram device or making any physical change to the pipe casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.