Wedge lock stabilizer
US4378852A · kind A · utility
Inventor
Key dates
| Filing date | Apr 9, 1981 |
| Grant date | Apr 5, 1983 |
| Priority date | — |
| Expiry date | Apr 9, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B2200/30
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill string stabilizer in which the wall-contacting wear elements are secured in their accommodating slots by an undercut along each side and a tapered wedge-receiving notch along the underneath side for accepting one or more wedge pieces. In one embodiment, the tapered notch is along the side of an axially elongate slot and a plurality of wedges are located in securing position along one side. In another embodiment, there are tapered notches along the center between two separated sections of wear elements. In a third embodiment, the slot for the wear elements is not axially elongated but on a spiral angle. In a fourth embodiment, a pluraity of short wear elements are employed end-to-end, each with its own wedge piece and each also located on a thrust-bearing and locating pin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.