Rolling cone drill bit having non-circumferentially arranged cutter elements
US7370711B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 2005 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Feb 17, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rolling cone drill bit including multiple cones with regions of intermeshing and non-intermeshing cutter elements. In the non-intermeshed regions, an array of cutter elements is disposed about the cone surface in a non-circumferential arrangement with the cutter elements being mounted at differing radial distances from the bit axis. This non-circumferential arrangement, which may be a spiral, multiple spirals, other patterns of offset cutter elements, or a random arrangement, provides a composite cutting profile having substantial width and bottomhole coverage and is free of ridge-producing voids. In certain embodiments, the composite cutting profiles of the arrays at least partially overlap, and may be arranged to cover a portion of or the entire non-intermeshed region on the cones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.