Kwihlabathi lokugrumba, ukuvela kwezixhobo zokusika zePDC (polycrystalline diamond compact) kube yinto etshintshe kakhulu kushishino lweoyile negesi. Kwiminyaka edlulileyo, izixhobo zokusika zePDC ziye zatshintsha kakhulu kuyilo kunye nokusebenza kwazo, ziphucula ukusebenza kwazo kwaye zandisa ixesha lazo lokuphila.
Ekuqaleni, ii-PDC cutters zenzelwe ukubonelela ngenye indlela eqinileyo nesebenzayo kunee-tungsten carbide inserts zemveli. Zaqala ukwaziswa ngeminyaka yoo-1970 kwaye zakhawuleza zathandwa ngenxa yokukwazi kwazo ukumelana namaqondo obushushu aphezulu kunye noxinzelelo kwizicelo zokubhola nzulu. Nangona kunjalo, ii-PDC cutters zokuqala zazithintelwe bubume bazo bokuqhekeka kwaye zazinokuqhekeka nokuqhekeka.
Njengoko ubuchwepheshe buhambela phambili, abavelisi baqala ukuzama izinto ezintsha kunye noyilo ukuphucula ukusebenza kwezixhobo zokusika zePDC. Enye yezona zinto zibalulekileyo kukwaziswa kwezixhobo zokusika zedayimani yepolycrystalline (TSP) ezizinzileyo kubushushu. Ezi zixhobo zokusika zazinomaleko wedayimani oqinileyo kwaye zinokumelana nobushushu obuphezulu kunye noxinzelelo kunezixhobo zokusika zePDC zemveli.
Olunye uphuculo olukhulu kubuchwepheshe bokusika bePDC yayikukungeniswa kwee-hybrid cutters. Ezi cutters zadibanisa ukuqina kwePDC kunye nokuqina kwe-tungsten carbide ukwenza isixhobo sokusika esinokuphatha nezona zicelo zokubhola zinzima kakhulu.
Kwiminyaka yakutshanje, ukuqhubela phambili kwiindlela zokwenza izinto kuye kwavumela ukwenziwa kwejometri ezintsonkothileyo kwii-PDC cutters. Oku kukhokelele ekuphuhlisweni kwee-cutters ezikhethekileyo ezenzelwe ukusetyenziswa okuthile kokugrumba, njengokugrumba kwicala elithile kunye nokugrumba ngoxinzelelo oluphezulu/ubushushu obuphezulu.
Uphuhliso lwezixhobo zokusika zePDC lube nefuthe elikhulu kwishishini leoyile negesi. Ngenxa yokukwazi kwazo ukumelana neemeko ezinzima kwaye zihlala ixesha elide kunezixhobo zokusika zemveli, izixhobo zokusika zePDC zonyuse ukusebenza kakuhle kokugrumba kwaye zanciphisa ixesha lokungasebenzi. Njengoko iteknoloji yokugrumba iqhubeka ihambela phambili, kusenokwenzeka ukuba siza kubona uphuhliso oluthe kratya kuyilo kunye nokusebenza kwezixhobo zokusika zePDC.
Ukuqukumbela, abasiki bePDC bahambe indlela ende ukusukela oko baqaliswa ngeminyaka yoo-1970. Ukususela kwiintsuku zabo zokuqala njengenye indlela ehlala ixesha elide endaweni ye-tungsten carbide inserts, ukuya kuphuhliso lwabasiki abakhethekileyo abenzelwe ukusetyenziswa okuthile kokugrumba, ukuvela kwabasiki bePDC kube yinto emangalisayo. Njengoko ishishini leoyile negesi liqhubeka nokukhula, abasiki bePDC ngokuqinisekileyo baya kudlala indima ebalulekileyo ekuqhubeni ukusebenza kakuhle kunye nemveliso kwimisebenzi yokugrumba.
Ixesha lokuthumela: Matshi-04-2023
