Drilling assembly with reduced stick-slip tendency

Details Drilling assembly with reduced stick-slip tendency Drilling assembly with reduced stick-slip tendency

1998-04-16

2000-12-26

Horabik, Michael

Communications: electrical

Wellbore telemetering or control

Selective control of subsurface equipment

3408533, 7315247, G01V 300

Patent

active

061666548

ABSTRACT:
A system for drilling a borehole in an earth formation is disclosed, the system comprising a first sub-system including a drill string extending into the borehole, and a second sub-system including a drive system for driving the drill string in rotation about the longitudinal axis thereof. Each one of said sub-systems has a rotational resonance frequency, wherein the rotational resonance frequency of the second sub-system is lower than the rotational resonance frequency of the first sub-system.

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patent: 5864058 (1999-01-01), Chen

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