DOWNHOLE ASSEMBLY TO MITIGATE HIGH FREQUENCY TORSIONAL OSCILLATION, AND OSCILLATION MITIGATION TOOL SUITABLE FOR USE IN A DOWNHOLE ASSEMBLY

A downhole assembly to mitigate high frequency torsional oscillation, in particular the high frequency torsional oscillation which can occur in a drilling operation for geothermal energy or for oil and gas. The downhole assembly has a rotary steerable tool and a high frequency torsional oscillation...

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Bibliographische Detailangaben
Hauptverfasser:	CROWLEY, Daniel Brendan, SEDGEMAN, Robert Donald John
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	A downhole assembly to mitigate high frequency torsional oscillation, in particular the high frequency torsional oscillation which can occur in a drilling operation for geothermal energy or for oil and gas. The downhole assembly has a rotary steerable tool and a high frequency torsional oscillation mitigation tool, the high frequency torsional oscillation mitigation tool having a one-way coupling, the high frequency torsional oscillation mitigation tool being located above the rotary steerable tool. Also relates to an oscillation mitigation tool suitable for use in a downhole assembly.