Madhaka mavharuvhu gedhi gedhi rakasimba, hunde inosimuka, mavharuvhu emagedhi ane zvisimbiso zvinosimba, mavharuvhu aya akagadzirwa zvinoenderana neAPI 6A chiyero. Inonyanya kushandiswa kudhaka, simenti. fracturing uye sevhisi yemvura uye iri nyore kushanda uye iri nyore kuchengetedza.