Mea ʻokiʻoki uhi

He kūpono kēia mea hana no ka wehe ʻana i ka lepo i koe paha ma luna o nā paia o loko o ka pahu, e like me ka sima paʻa, ka wax paʻakikī, nā kristal paʻakai like ʻole a i ʻole nā ​​waihona, nā burr perforation, nā koena hao oxide i loaʻa mai ka popo ʻana, i mea e hele ai nā mea hana lua i lalo me ka wehe ʻole ʻia. ʻOi loa i ka wā e loaʻa ai kahi hakahaka poepoe liʻiliʻi ma waena o nā mea hana lua i lalo a me ke anawaena o loko o ka pahu, ʻoi aku ka pono o ka ʻōpala piha ma mua o ka hana hou ʻana. I kēia manawa ma ka luawai petroleum nui, ʻo ka ʻōpala ʻana i ka paia o loko o ka pahu ma o ka hoʻohana ʻana i ka casing scraper he hana pono ia.