Flow channels for tooth type rolling cutter drill bits
US5676214A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Apr 3, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A moth type rolling cutter drill bit has a plurality of rolling cutters mounted on legs, each rolling cutter having a back face portion and a gage face portion, and a high velocity fluid nozzle which directs a stream of high velocity fluid toward the cutter. Each cutter has a row of gage teeth to cut the gage of the borehole, and at least one of the cutters has a plurality of flow channels spaced apart around its gage face portion to provide fluid communication from the back face of the cutter and between and around pairs of adjacent gage teeth. Each flow channel is inclined at an angle to a radius of the cutter so as to be oriented towards the stream of fluid from the high velocity nozzle as the teeth adjacent to the flow channel engage the formation being drilled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.