Musanathamangire ku downhole, max.kukula kwa tsamba kudzakhala kokulirapo m'kati mwake, mukathamangira ku dzenje, tsambalo limakanikizidwa kuti likanikizire kasupe, mphamvu yakuchiritsa imaperekedwa ndi masika.Zida zolimba zikafunika kuchotsedwa, kukhetsa kangapo kuyenera kuchitidwa musanaphatikize m'kati mwake.Chopukutiracho chimalumikizidwa pa chingwe chobowola chotsika, kusuntha kwa chingwe chobowola mmwamba ndi pansi kumapangitsa kudya kwa axially mu ntchito yochotsa.
Zimasonyezedwa m'mapangidwe ake kuti tsamba lililonse lozungulira lili ndi nsonga ziwiri zamkati ndi zakunja zopindika.Pamene tsamba likugwira ntchito yobwerezabwereza, m'mphepete mwamkati ndi kunja kwakunja zikugwira ntchito motsatana, ndipo pali bandi yotakata yopingasa pakati pa nsonga ziwiri zomwe zimayimira kudula ndi mphero pamalo odulidwa.
Zingwe zomangirazo zimayikidwa yunifolomu pa scraper kuti matope obwererawo atenge zinthu zomwe zachotsedwa.
Mukamayitanitsa chonde tchulani:
Casing Scraper Model;
Kugwirizana, ngati sikunali koyenera;
Casing kukula ndi kulemera.