Downhole tool including pressure intensifier for drilling wellbores
US6289998A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Jan 7, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling system utilizing the drilling fluid in a borehole to drive an apparatus to generate a high-pressure jet of fluid to facilitate the drilling operation. A pressure intensifier disposed between a drilling motor and the drill bit generates high pressure fluid jet. The drilling motor rotates the pressure intensifier. Fluid enters a high pressure chamber in the pressure intensifier at selected location during each rotation. A piston in the pressure intensifier discharges the fluid from the high pressure chamber to the drill bit bottom at a high pressure. An electrically-operated pulse frequency control device generates fluid pulses of at least two frequencies, each such frequency defining a bit of a binary system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.