HV Thomeer, ZR Xu, S Adnan, MH Kenison - US Patent 6,915,848, 2005 - Google Patents
4,656.463 A 4f1987 Anders et al. Surface to a downhole tool as a form of telemetry. The 4,
684946 A 8/1987 Issenmann telemetry element or elements are provided with identifica …