METHODS AND APPARATUS FOR GENERATING ELECTROMAGNETIC TELEMETRY SIGNALS
摘要
An electromagnetic telemetry signal generating assembly comprises a first section of drill string, a second section of drill string, a gap sub configured to insulate the first section from the second section, and a power source configured to provide a first voltage to a control circuit. The control circuit is configured to drive a second voltage between the sections of drill string. The gap sub provides a gap of at least 12 inches (30cm). The second voltage may be different than the first voltage.
申请公布号
CA2915133(A1)
申请公布日期
2014.12.24
申请号
CA20142915133
申请日期
2014.06.20
申请人
EVOLUTION ENGINEERING INC.
发明人
LOGAN, AARON W.;AHMOYE, DANIEL W.;SWITZER, DAVID;LOGAN, JUSTIN C.;DERKACZ, PATRICK R.;KAZEMI MIRAKI, MOJTABA