SYSTEMS AND METHODS FOR DOWNHOLE BHA INSULATION IN MAGNETIC RANGING APPLICATIONS

摘要

A ranging system includes a drill string comprising a bottom hole assembly (BHA). A plurality of ranging devices are positioned in a spaced-apart orientation on the drill string and are operable to provide a conducting contact with a formation. At least one insulator member is positioned on the drill string between the plurality of ranging devices and is operable to provide a non-conducting contact with the formation. During drilling operations, the plurality of ranging devices provide conducting contact with a formation while the at least one insulator member provides non-conducting contact with the formation so as to enhancing ranging operations while drilling. A method of modeling and simulating drill string response is provided to identify locations along the drill string for positioning insulator members. Fig 8 WO 2011/146889 PCT1US20111037429 LO) co CN (0 coo