Downhole progressive cavity type drilling motor with flexible connecting rod
US4636151A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1985 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Mar 13, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C15/0076
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A downhole motor of the progressive cavity, or Moineau, type. The motor has a stator, and a rotor within the stator. The rotor rotates and gyrates in response to fluid flow through the stator. A shaft is located within a housing which is connected to the stator. A flexible rod extends between the rotor and the shaft for translating the rotation and gyration of the rotor to the true rotation of the shaft. The rod has an upset section on each end, and upper and lower connections connect the upset sections of the rod to the rotor and to the shaft. The connections are nonintegral to the rod, and are made of a different material from the rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.