DEVICE FOR MEASURINGS OF GEOPHYSICAL AND TECHNOLOGICAL PARAMETERS IN COURSE OF DRILLING WITH ELECTROMAGNETIC COMMUNICATION CHANNEL Russian patent published in 2009 - IPC E21B47/12 

FIELD: physics, measuring.

SUBSTANCE: invention relates to field of trade geophysics, namely to devices for measurings of geophysical and technological parameters in the course of drilling and their transmission on surface. Device for measurings of geophysical and technological parameters in the course of drilling with electromagnetic communication channel consists from downhole telemetering system including boring column, power unit, measuring modules, module of a sending device with the receiving-processing block, electrical divider and additional measuring module installed separately in the boring column which contains case with central flushing port, central electrode located on the case and isolated electrically from the case, and also the cases located in dredging in its hermetic part circuitries, measuring data units, power supply and transmission device. The central electrode on the case is taken out from hermetic part of the case with dredging and separated from this part by sealing devices, thus, the specified central electrode is supplied by the dot electrocontacts isolated from the case, and the dot electrocontacts are joined with the circuitries using current distributors, laid in channels of walls of the case, with feed-through plates on the extremities.

EFFECT: increase of construction reliability, increase of telesystem operation resource and expansion of its operation capability.

2 dwg