Pressure balanced fluid operated reaming tool for use in placing wellbore tubulars
US9080384B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2012 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Dec 2, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B4/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for cutting a wellbore includes a motor having a stator and a rotor. The rotor has an output shaft connected to a cutting structure. The stator and rotor are spaced radially outwardly of the axis of rotation of the rotor such that at least one of the stator and the rotor had an access bore extending through the motor to adjacent the cutting structure. A further object can pass therethrough, without obstruction. The further object comprises a further cutting. A flow diverter is disposed in the motor proximate a connection between the motor and a wellbore tubular, and has a first fluid outlet in fluid communication with a power section of the motor, and a second fluid outlet in fluid communication with the access bore. The flow diverter is coupled to the stator such that axial loading created by fluid pressure is substantially transferred to the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.