Hauv kev lag luam roj thiab roj drilling, PDC (polycrystalline pob zeb diamond sib xyaw) cutters, los ntawm kev tsim kho tshiab hauv cov ntaub ntawv thiab cov qauv, tau tsim cov txiaj ntsig tseem ceeb ntawm cov pob zeb tsoos tsoos - cov cuab yeej tawg, dhau los ua lub hauv paus tseem ceeb hauv kev txhim kho drilling efficiency thiab nyiaj txiag txiaj ntsig.
Lawv qhov txiaj ntsig tseem ceeb yog nyob rau hauv lawv cov pob zeb zoo tshaj - tawg ua haujlwm. PDC cutters hloov qhov cuam tshuam crushing nrog nruam shearing. Lub siab hardness ntawm cov pob zeb diamond txheej (8000-10000 HV Vickers) tso cai rau lawv kom zoo txiav mus rau hauv mos mus rau nruab nrab-nyuaj formations. Cov cuab yeej drilling ceev tuaj yeem ncav cuag 2-5 zaug ntawm cov menyuam lub khob hliav qab, nce cov duab ib ntsis los ntawm 3-10 zaug, ua rau lub voj voog drilling, thiab ua rau lawv tshwj xeeb tshaj yog haum rau kev nrawm nrawm hauv cov qauv tsim xws li shale thiab sandstone.
Ib qho ultra- lub neej ua haujlwm ntev yog lwm qhov txiaj ntsig tseem ceeb. Qhov hnav tsis kam ntawm cov pob zeb diamond txheej deb tshaj li ntawm cov hniav tungsten carbide. Ua ke nrog cov kev cuam tshuam toughness ntawm cov cemented carbide matrix, lub cutter tuav ib tug ntse txiav ntug thaum lub sij hawm ntev - ua hauj lwm, txo qhov zaus ntawm xyaum me ntsis hloov. Cov ntaub ntawv pov thawj qhia tau tias nyob rau hauv tib txoj kev ua haujlwm, PDC laum cov khoom muaj lub neej ntev dua ob peb zaug ntau dua li cov menyuam lub khob hliav qab, txo qhov tsis yog - lub sijhawm tsim khoom thiab cov nqi sib tw.
Ib puag ncig zoo adaptability nthuav dav daim ntawv thov ciam teb. Nws cov thermal stability (pob zeb diamond lub siab thermal conductivity thiab qis coefficient ntawm thermal expansion) tiv taus qhov kub siab ntawm cov dej sib sib zog nqus, nws cov qauv sib xyaw tsis cuam tshuam cov pob zeb nyuaj, thiab nws qhov hloov pauv ntawm cov duab geometric (zoo li, qhov loj me, cov hniav faib tawm) tuaj yeem sib phim rau cov txheej txheem nyuaj xws li cov txheej txheem sib txuas thiab sib tshooj, ua kom muaj qhov zoo li qub.
Economy thiab kev nyab xeeb yog synergistically txhim kho. Lub pob zeb tawg tau zoo heev thiab lub neej ntev ncaj qha txo lub zog thiab cov khoom siv hauv ib chav tsev ntawm qhov drilling footage, thaum lub tshuab shearing ruaj khov txo qhov kev sib tsoo me ntsis, txo qhov kev pheej hmoo ntawm qhov tsis zoo ntawm qhov tsis zoo, thiab pab txhawb kev siv cov txheej txheem nyuaj xws li cov kev taw qhia thiab kab rov tav qhov dej, ua tiav ob lub hom phiaj ntawm kev tiv thaiv reservoir thiab kev nyab xeeb kev ua haujlwm.
Nrog nws cov txiaj ntsig zoo hauv kev ua tau zoo, kev ua neej nyob, thiab kev yoog raws, PDC cutter tau hloov kho cov cuab yeej thev naus laus zis ntawm cov roj thiab roj drilling, muab kev txhawb nqa tseem ceeb rau kev txhim kho qhov dej tob thiab txo nqi.
