API 7-1 Inotenderera Uye Isina Kutenderera Casing Scraper
Chishandiso ichi chakanakira kubvisa tsvina inogona kusara pamusoro pemadziro emukati mebhokisi, senge simende yakasimba, wakisi yakaoma, makristaro akasiyana-siyana emunyu kana madhipoziti, maburi ekuboora, masara esimbi oxide anokonzerwa nengura, kuitira kuti maturusi ese ari pasi pegomba apfuure nepasina kuvharwa. Kunyanya kana paine nzvimbo diki yakatenderera pakati pematurusi ari pasi pegomba uye dhayamita iri mukati, kukwesha kwakazara kunonyanya kukosha usati waenderera mberi nekushanda. Parizvino, kukwesha kwemvura mugomba guru repetroleum mumadziro emukati mebhokisi uchishandisa chikwesha chebhokisi idanho rinokosha.