METHOD AND APPARATUS FOR TRANSMISSION OF WELL-BORE DATA ON MULTIPLE CARRIER FREQUENCIES
摘要
<p>A wireline telemetry system and method of transmitting data on multiple carrier frequencies. The system and method adjust power level and number of bits-per-carrier to optimally or near-optimally utilize the capacity of the wireline cable. Due to the nature of wireline telemetry the overall power level is restricted only by the output capability of the downhole telemetry cartridge and the input power restrictions of the uphole telemetry unit receiver. The optimal power level is determined during a training sequence a nd is a function of such factors as cable length, cable material, cable temperature and cable geometry. The uplink and downlink transmission are executed using different modulation techniques.</p>
申请公布号
CA2392670(A1)
申请公布日期
2001.07.05
申请号
CA20002392670
申请日期
2000.11.08
申请人
SCHLUMBERGER CANADA LIMITED
发明人
RICHARDSON, SUZANNE D.;STEINER, JOSEPH M., JR.;HERNANDEZ-MARTI, RAMON;MAYHUGH, TERRY L.;BOMBAY, BART J.;CLARK, LLOYD D., JR.;MARTINEZ, GILBERT R.;BOOKER, JOHN A.