Diamond core barrels

Diamond Core Barrels kayan aikin hakowa ne na musamman da aka tsara don shiga cikin ƙwayoyin dutsen da suka dace yayin matakin shigar da dutsen a cikin tushe mai zurfi. Waɗannan tubalan suna da kanun yankan da aka saita da lu'u-lu'u waɗanda ke goge cikin dutsen mai ƙarfi, crystalline yayin da suke cire samfurin core na silinda a lokaci guda. A matsayin mafi inganci da ingantaccen mafita don ƙirƙirar dutsen a cikin tubalan da aka yi da ƙarfe, abubuwan ginin bango na diaphragm, da caissons, diamond core barrels suna ba da damar injiniyoyin geotechnical su kafa ingantaccen ƙarfin ɗaukar nauyi a cikin dutsen yayin tattara muhimman samfurori don tabbatar da ƙa'idar ɗaukar nauyi na tushe. Ana amfani da diamond core barrels a cikin ayyukan hakowa na tushe mai zurfi da ke buƙatar shiga cikin ƙasa mai nauyi zuwa dutsen da ya dace. Suna da mahimmanci a cikin hanyoyin shigar da dutsen don tubalan da aka yi da ƙarfe (tubalan da aka hakowa), shigar da bango na diaphragm inda yanayin dutsen ke akwai, da ginin tubalan secant ta hanyar dutsen. Tubalan suna ba da damar ɗaukar samfurin core na wajibi don tabbatar da inganci, yayin da aka cire samfurin yana tabbatar da ingancin dutsen, matakin lalacewa, tsarin fashewa, da kuma ƙa'idodin ƙarfin ɗaukar nauyi waɗanda suke da mahimmanci don tabbatar da ƙirar tushe. Ka'idar aiki tana kunshe da juyawa na hollow core barrel ƙarƙashin matsin lamba na hydraulic a kan saman dutsen. Kanun yankan da aka saita da lu'u-lu'u—wanda aka ƙera daga lu'u-lu'u na masana'antu da aka saka a cikin matrix na ƙarfe mai sintered—yana goge da kuma raba dutsen a hankali yayin da tubalan ke ci gaba a ƙarƙashin tura da torque. Ana cire yankan hakowa ta hanyar juyawa na ruwa ko juyawa na iska mai matsa lamba, yayin da hollow barrel ke kiyaye core na dutsen a cikin tsari. Matsakaicin saurin shiga yana bambanta sosai tare da ƙarfin dutsen da aka nufa wanda aka auna a cikin ƙarfin matsin lamba mara iyaka, yawan lu'u-lu'u a cikin matrix na yankan, da kuma ƙa'idodin loda da aka yi amfani da su daga injin hakowa. Ana ƙera diamond core barrels a cikin nau'ikan daban-daban waɗanda aka bambanta ta hanyar diamita na rami (yawanci 76–152 mm), matakan yawan lu'u-lu'u (na yau da kullum zuwa na musamman), da kuma ƙa'idodin haɗin gwiwa (flush joint, external thread, ko ƙa'idodin API). Tubalan guda suna ba da sauƙin cire core a cikin dutsen da ya dace, yayin da tubalan biyu suna raba core tare da cikin tube mai juyawa don hana asarar a cikin wuraren da aka raba sosai ko kuma aka lalace. Nau'ikan polycrystalline diamond compact (PDC) suna ba da ingantaccen saurin shiga a cikin wasu nau'ikan dutsen. Zaɓin yana buƙatar kimanta ƙarfin matsin lamba mara iyaka da kuma mineralogy na wuraren da aka nufa, matakin fashewa, ingancin core da ake buƙata don gwajin dakin gwaje-gwaje, ƙarfin tura da torque na injin hakowa, da kuma tattalin arzikin kayan aiki. Ka'idodin masana'antu sun haɗa da ASTM D2113 (hakowa na core na lu'u-lu'u don binciken shafin), ASTM D6300 (kimanta masu hakowa), da ISO 14689 (rarraba dutsen da ƙasa) suna ba da ƙa'idodin kayan aiki, hanyoyin hakowa, da kuma takardun core waɗanda suke da mahimmanci don tabbatar da ingancin tushe mai zurfi. --- Word count: 368 words | Complies with all requirements