High impact resistant degradation element
US9316061B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 11, 2011 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Aug 17, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/1837
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In one aspect of the invention, a degradation element includes a substrate bonded to a sintered polycrystalline ceramic. The sintered polycrystalline ceramic has a tapering shape and a rounded apex. The rounded apex has a curvature with a 0.050 to 0.150 inch radius when viewed from a direction normal to a central axis of the degradation element that intersects the curvature. The rounded apex includes the characteristic of when the rounded apex is loaded against a rock formation, the rounded apex fails the rock formation forming a crushed barrier ahead of the rounded apex that shields the rounded apex from a virgin portion of the rock formation while still allowing the rounded apex to penetrate below a surface of the rock formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.