ALL DTH drill tubes are friction welded, 'me hangata likhoele ke maqhama a tloaelehileng a API, joalo ka 2 3/8″ API REG thread, 3 1/2″ API REG thread kapa API IF khoele, joalo-joalo Ho ea ka kopo ea bareki, ho tloha 1000mm ho ea ho 5000mm bolelele ba li-tubes, OD re ka fana ka 50mm, 60mm, 76mm, 89mm, 102mm

Masiba a lihlahisoa:

1:Nitriding holim'a khoele ea molamu ho ntlafatsa ho thatafala ha khoele le ho eketsa ho hanyetsa ha khoele.
2: Ho sebelisa R780 e le lisebelisoa tsa 'mele oa molamu ho ntlafatsa ho hanyetsa le matla, lisebelisoa tsa 42 Cr Mo bakeng sa khoele ea khoele.
3: E amohela kalafo e khopisang ho fokotsa boima ba molamu ha o ntse o boloka matla a li-welds(botenya badth pipeke 6.5mm ha sebaka sa welds se le 8.5mm).