| Abstract: | eslimholediamond drilling equipments and drilling program needed in the drilling of pilothole,as well as super series drilll rod,large inner annulus diam ond wireline coring system and oversize diamond bitneeded in thedeep- hole drilling have heen mainly introduced; the research of CSDC(Continental ScientificDrilling in Cl ina) which involves the development of high performance,long service life, aggressive diamondbits and reamers, and downhole motor driven double-tube coring and wireline coring systemshave also beenbriefly introduced. A good effect was obtained for the former in the aspects of manufacturing materials,bitstructure and manufacturing methods. Three types ofhydro- hammers andhole hottom motor driven"three-in- one"wireline coring system were developed and put into practice. |
