Reamer
US9151118B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2010 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Nov 12, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1078
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole apparatus for reaming a borehole incorporates two sets of cutting structures into two integral blade stabilizers, one oriented downhole and the other oriented uphole. The cutting structures comprise polycrystalline diamond cutters that are brazed into a wedge of steel that is inserted into the body of the reamers in an axial direction and retained by a stop block and retention cover that is bolted into the reamer. The two integral blade stabilizers have a combination left hand/right hand blade wrapping to provide 360° support around the circumference of the reamer. Between the two stabilizers, an impeller and a flow accelerator agitate cuttings on the low side of the borehole to mix the cuttings in with the drilling mud.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.