I-PDC NOMA I-PCD DRILL BIT? UYINI UMEHLUKO?
I-PDC drill bit isho i-Polycrystalline Diamond Cutter core bit
Imithombo yokuqala kwakuyimithombo yamanzi, imigodi engajulile eyayimbiwa ngezandla ezindaweni lapho itafula lamanzi lalisondela khona, ngokuvamile elinezindonga zokhuni noma zokhuni ezimboze izindonga.
Ama-PDC enziwa ngokuhlanganisa ezinye izendlalelo zamadayimane e-polycrystalline (PCD) nesendlalelo se-carbide liner esiqinisiwe ekushiseni okuphezulu kanye nokucindezela okuphezulu.
Ama-PDC aphakathi kwezinto eziqinile kakhulu kuzo zonke izinto zamathuluzi edayimane.
I-PCD isho nje i-Polycrystalline Diamond: I-PCD ivame ukwenziwa ngokucwilisa amakristalu amaningi edayimane elilodwa ngobukhulu obuncane ekushiseni okuphezulu kanye nomfutho ophezulu. I-PCD inokuqina okuhle kokuqhekeka kanye nokuqina okuhle kokushisa, futhi isetshenziswa ekwenzeni izingcezu zokubhoboza ze-geological.
I-PDC inezinzuzo zokumelana nokuguguleka okuphezulu kwedayimane kanye nokuqina okuhle kwe-carbide.
Sihlinzeka ngama-PDC drill bits enziwe ngohlu lwezicucu ezibunjiwe noma ama-polycrystalline diamond compacts (PDC) aboshwe emzimbeni.
Izicucu ze-PDC zenziwe nge-carbide substrate kanye ne-diamond grit. Ukushisa okuphezulu okungaba ama-degree angu-2800 kanye nokucindezela okuphezulu okungaba yi-1,000,000 psi kwakha i-compact. Kukhona ne-cobalt alloy futhi isebenza njengesisusa senqubo yokusila. I-cobalt isiza ukubopha i-carbide nedayimane.
Njengomthetho ojwayelekile, izisiki ezinkulu (19mm kuya ku-25mm) zinamandla kakhulu kunezisiki ezincane. Kodwa-ke, zingase zandise ukuguquguquka kwe-torque.
Izicucu ezincane (8mm, 10mm, 13mm kanye no-16mm) zikhonjisiwe ukuthi zibhoboza nge-ROP ephezulu kunezicucu ezinkulu kwezinye izinhlelo zokusebenza. Esinye sezicelo ezinjalo yi-limestone isibonelo.
Ngaphezu kwalokho, izicucu ezincane zikhiqiza izicucu ezincane kuyilapho izicucu ezinkulu zikhiqiza izicucu ezinkulu. Izicucu ezinkulu zingabangela izinkinga ekuhlanzweni kwemigodi uma uketshezi lokubhoboza lungakwazi ukuthwala izicucu phezulu.
(1) noma (2) Okunamathelayo nokuthambile - Ukwakheka okubhobozeka kalula njengobumba, i-marl, i-gumbo kanye nesihlabathi esingahlanganisiwe.
(3) Izihlabathi ezithambile-eziphakathi-eziphansi ezinamandla okucindezela, i-shale kanye ne-anhydrite ezinezingqimba eziqinile ezixubene.
(4) Isihlabathi esinamandla okucindezela aphakathi nendawo, ushoki, i-anhydrite kanye ne-shale.
(6) Ukuqina okuphakathi nendawo - Amandla aphezulu okucindezela ngesihlabathi esingabukhali noma esingebukhali kangako, i-shale, i-lime kanye ne-anhydrite.
(7) Amandla okucindezela aqinile-aphezulu anezingqimba ezibukhali zesihlabathi noma itshe le-silt.
(8) Izakhiwo eziqinile kakhulu neziqinile futhi ezibukhali njenge-quartzite kanye nedwala lentaba-mlilo.
ISAKHIWO SOKUSIKA SE-PDC
Ama-pdc bits athambile kakhulu (1) kuya kwaphakathi (4) anosayizi owodwa oyinhloko wokusika kwe-PDC. Isakhiwo sokusika se-PDC sichazwa ngale ndlela elandelayo:
2 - le ngxenye inabasiki abaningi abangu-19mm
3 - le ngxenye inabasiki abaningi abangu-13 mm
4 – le ngxenye inabasiki abaningi abangu-8 mm
Amabhithi e-PDC
Isikhathi sokuthunyelwe: Agasti-31-2022