ELEKTROMAGNETSKI TELEMETRIJSKI SUSTAVI - GDJE I ZAŠTO?

Application of electromagnetics as a mean of data transfer from bottom hole assembly to the surface during deep well drilling is described. Particularly, it is convenient when drilling with foam, aerated mud or air drilling in underbalance condition. Historic development of electromagnetics (EM) and of EM Measurement While Drilling (EM MWD) is elaborated briefly. Accentuated is the problem of attenuation of EM waves propagating through the rocks.Opisana je uporaba elektromagnetizma kao načina prijenosa pokazatelja od alatki na dnu bušotina do površine. To je posebno povoljno kod bušenja uz uporabu pjene, aerizirane isplake ili ispuhavanja pri bušenju u uvjetima podtlaka. Sažeto je prikazan povijesni razvitak elektromagnetizma i elektromagnetske telemetrije. Naglašen je problem slabljenja elektromagnetskih valova pri prolazu kroz stijene