A down-hole reaming apparatus

A down-hole reaming apparatus 100 having two integral blade stabilisers 130, 140 each orientated in a different rotational directions and each having cutting structures located on the blades 110, 120. An impeller 150 and a flow accelerator 160 are located between the stabilisers. The impeller consis...

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Bibliographische Detailangaben
Hauptverfasser:	PAUL ALLAN SIBBALD, DANIEL JOHN ROBSON, CHRISTOPHER KONSCHUH, LAURIER EMILE COMEAU
Format:	Patent
Sprache:	eng
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 down-hole reaming apparatus 100 having two integral blade stabilisers 130, 140 each orientated in a different rotational directions and each having cutting structures located on the blades 110, 120. An impeller 150 and a flow accelerator 160 are located between the stabilisers. The impeller consists of a plurality of radial blades arranged helically around the longitudinal axis of the impeller. The flow accelerator has a variable diameter profile along its longitudinal axis formed by a first region having a increasing diameter and a second region having a decreasing diameter which is longer than the first region. An integral blade stabiliser includes a plurality of blades and a cutting section on each blade, comprising a wedge with a plurality of cutters located on an end of the blade with a retention section holding the wedge in place.