Invention Grant
- Patent Title: Method and system for directional drilling
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Application No.: US14888007Application Date: 2014-04-28
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Publication No.: US10041302B2Publication Date: 2018-08-07
- Inventor: Jan-Jette Blangé , Paul Anthony Donegan McClure
- Applicant: SHELL OIL COMPANY
- Applicant Address: US TX Houston
- Assignee: SHELL OIL COMPANY
- Current Assignee: SHELL OIL COMPANY
- Current Assignee Address: US TX Houston
- Priority: EP13165805 20130429
- International Application: PCT/EP2014/058568 WO 20140428
- International Announcement: WO2014/177502 WO 20141106
- Main IPC: E21B10/60
- IPC: E21B10/60 ; E21B7/06 ; E21B41/00 ; E21B7/04

Abstract:
A method, system and bit steering assembly for directional drilling of a borehole in a formation is presented. The method includes the steps of: providing a drill string having a central fluid passage extending along a longitudinal axis of the drill string for passing drilling fluid to the drill bit. The drill bit has a plurality of nozzles for expelling the drilling fluid, wherein each nozzle is arranged eccentrically with respect to the longitudinal axis. The method includes introducing a bit steering assembly, rotating the drill string, and pumping drilling fluid through the central fluid passage. The drilling fluid activates a first impeller of a first rotor section to rotate in a first direction, and activates a second impeller of a second rotor section to rotate in a second direction opposite the first direction. The method includes adjusting a coupling between the first rotor section and the second rotor section.
Public/Granted literature
- US20160076305A1 METHOD AND SYSTEM FOR DIRECTIONAL DRILLING Public/Granted day:2016-03-17
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