A method and system of drilling straight directional and multilateral wells utilizing hydraulic frictional controlled drilling, by providing concentric casing strings to define a plurality of annuli therebetween; injecting fluid down some of the annuli; returning the fluid up at least one annulus so...http://www.google.es/patents/US20030062198?utm_source=gb-gplus-sharePatente US20030062198 - Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings
Method and system for hydraulic friction controlled drilling and completing ...
Número de solicitud: 10/262,557 Número de publicación: US 2003/0062198 A1 Fecha de presentación: 30 Sep 2002 Patente emitida: US6745855 ( Fecha de emisión 8 Jun 2004)
