Uyilo lweeBits zePDC drill zanamhlanje njenge-matrix alufani kangako nolo lweminyaka embalwa eyadlulayo. Amandla okuxinana kunye nokumelana nempembelelo kunyuke ubuncinane nge-33%, kwaye amandla e-cutter brazes anyuke nge-≈80%. Kwangaxeshanye, iijometri kunye netekhnoloji yezakhiwo ezixhasayo ziphucukile, nto leyo ebangele ukuba kubekho iimveliso ze-matrix eziqinileyo nezivelisayo.
Izinto zokusika
Izicucu zePDC zenziwe nge-carbide substrate kunye ne-diamond grit. Ubushushu obuphezulu obumalunga nama-2800 degrees kunye noxinzelelo oluphezulu olumalunga ne-1,000,000 psi zenza i-compact. I-cobalt alloy ikwasebenza njengesihluzi senkqubo yokusila. I-cobalt inceda ukubopha i-carbide kunye ne-diamond.
Inani labasiki
Sidla ngokusebenzisa izicucu ezimbalwa kwiibhithi ezithambileyo zePDC njengoko isicucu ngasinye sisusa ubunzulu obukhulu bokusika. Ukuze kubekho ukwakheka okuqinileyo, kubalulekile ukusebenzisa izicucu ezininzi ukuze kulungiswe ubunzulu obuncinci bokusika.
Iibhithi zokubhola zePDC – Ubungakanani beCutters
Kwizinto ezithambileyo, sikhetha izixhobo zokusika ezinkulu kunezo ziqinileyo. Ngokwesiqhelo, uluhlu oluqhelekileyo lobukhulu luqala kwi-8 mm ukuya kwi-19 mm kwi-bit yomntu.
Ngokubanzi sichaza indlela yoyilo lwe-cutter rack ngokusebenzisa i-back rake kunye nee-engile ze-side rake.
●I-cutter back rake yi-engile evezwa bubuso bomsiki ukuya kwisakhiwo kwaye ilinganiswa ukusuka ngokuthe nkqo. Ii-engile ze-back rake ziyahluka phakathi, ngokwesiqhelo, ukusuka kwi-15° ukuya kwi-45°. Azihlali zijikeleza i-bit, okanye ukusuka kwi-bit ukuya kwi-bit. Ubukhulu be-engile ye-cutter rake yee-PDC drill bits buchaphazela i-Penetration Rate (ROP) kunye nokumelana nokuguguleka kwe-cutter. Njengoko i-engile ye-rake isanda, i-ROP iyancipha, kodwa ukumelana nokuguguleka kuyanda njengoko umthwalo osetyenzisiweyo ngoku usasazeka kwindawo enkulu kakhulu. Ii-PDC cutters ezine-back rakes ezincinci zithatha ubunzulu obukhulu bokusika kwaye ke ngoko zinamandla ngakumbi, zivelisa i-Torque ephezulu, kwaye zisengozini yokuguguleka ngokukhawuleza kunye nomngcipheko omkhulu womonakalo wempembelelo.
●Ireyiki esecaleni yomsiki yindlela efanayo yokulinganisa indlela umsiki ajonge ngayo ukusuka ekhohlo ukuya ekunene. Ii-engile zereyiki esecaleni zihlala zincinci. I-engile yereyiki esecaleni inceda ekucoceni imingxunya ngokubhekisa iziqwenga kwi-annulus ngoomatshini.
Ixesha lokuthumela: Agasti-10-2023