Assembly for directional drilling of boreholes
Patent
·
OSTI ID:7041697
This patent describes a drilling assembly for directional drilling of boreholes in subsurface formations. The assembly comprising a downhole drilling motor. The motor having an output shaft which is suitable to drive a rotary drill bit and a motor housing which is suitable to be arranged at the lower end of a drill string; stabilizing means for stabilizing the assembly; means in the assembly for permanently tilting the central axis of the output shaft with respect to the longitudinal axis of the drill string in the borehole. It is characterized in that the stabilizing means include a lower-most stabilizer which is secured to and rotates with the output shaft.
- Assignee:
- Shell Oil Co., Houston, TX
- Patent Number(s):
- A; US 4880066
- Application Number:
- PPN: US 7-147402A
- OSTI ID:
- 7041697
- Country of Publication:
- United States
- Language:
- English
Similar Records
Down-hole drilling motor and method for directional drilling of boreholes
Apparatus for optional straight or directional drilling underground formations
Downhole motor and method for directional drilling of boreholes
Patent
·
Mon Jan 07 23:00:00 EST 1985
·
OSTI ID:5700182
Apparatus for optional straight or directional drilling underground formations
Patent
·
Tue Apr 26 00:00:00 EDT 1988
·
OSTI ID:7053185
Downhole motor and method for directional drilling of boreholes
Patent
·
Mon Dec 03 23:00:00 EST 1984
·
OSTI ID:6250159