Method for communicating information transmitter telemetry, telemetry, and, well,

摘要

Method for communicating telemetry information, the transmitter telemetry, and well. A telemetry system that transmits a signal in the hole downward link upward QAM in burst to the surface of the shaft is disclosed.In a preferred mode of execution.A tool in the downward hole coupled to a pair of conductors in a cable drilling or column pipe composite link transmits a signal to a burst QAM in ascending systemThe surface area. The QAM signal in burst comprises, preferably, a series of data tables with data telemetry.Each frame of data is, preferably, preceded by an interval of rest (when no signal is present), a timing synchronization sequ00b3u00eancia and a sequ00b3u00eancia training.The sequ00b3u00eancia synchronization timing is designed for easy recovery of timing to the surface, and the sequ00b3u00eancia training is designed to help in the adaptation of the equalizer.The data table includes, preferably, a synchronization field, a data totalizer counter and a sum in addition to the data.Direct digital synthesis is preferably employed to modulate the signal link upwards.