| 摘要 |
PCT No. PCT/FR91/00698 Sec. 371 Date Apr. 29, 1992 Sec. 102(e) Date Apr. 29, 1992 PCT Filed Aug. 30, 1991 PCT Pub. No. WO92/04644 PCT Pub. Date Mar. 19, 1992.A method for transmitting data from the bottom of a well to the surface is disclosed. The method includes measuring data indicative of at least one drilling condition at the bottom of a well, transmitting into a stream of drilling mud injected into a well pipe string a series of encoded pressure pulses representative of the data measurement, and detecting the encoded pulses at the surface using a pressure sensor which is in communication with the stream of drilling mud as it is being injected into an inlet of the pipe string. The method also includes, as a way of improving data detection, using a surface sensor to measure vibrations in the pipe string which are generated as a result of the propogation of the encoded pulses through the drilling mud.
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