IMPROVED DRILLING COLUMN COMMUNICATION SYSTEM, COMPONENTS AND METHODS Russian patent published in 2016 - IPC E21B47/12 E21B7/04 

FIELD: mining.

SUBSTANCE: invention relates to means of downhole tool communication with ground equipment. Disclosed is drilling column communication system, wherein drill string is used as electrical conductor, which provides communication between them. At that, system comprises: transceiver at wellhead, located on drilling rig, and downhole transceiver, located in working face area near the underground tool, including downhole transmitter, which transmits signal from the well bottom to drill string for transmission to receiver at the wellhead, which forms a part of transceiver at the well head. At that, transceiver at the wellhead and bottom-hole transceiver are made with possibility of joint operation for automatic modification of at least one working parameter of signal transmission from well bottom at least partially on the basis of signal quality deterioration from the well bottom detected by transceiver at the wellhead. At that, at least one of the following: downhole transceiver and transceiver at the wellhead comprise noise scanner for scanning noise of available signal transmission frequencies from the well bottom, so that less noisy transmission frequency is established, and wherein noise scanner includes filters unit with multiple bandpass filters for determination of the least noisy transmission frequency.

EFFECT: higher reliability and accuracy of downhole device location determining.

61 cl, 21 dwg