Munyika yekuchera, kushanduka kwezvicherwa zvePDC (polycrystalline diamond compact) kwave kuri kuchinja kukuru muindasitiri yemafuta negasi. Mumakore apfuura, zvicherwa zvePDC zvakachinja zvikuru mukugadzirwa uye mashandiro azvo, zvichivandudza mashandiro azvo uye kuwedzera hupenyu hwazvo.
Pakutanga, maPDC cutters akagadzirwa kuti ape imwe nzira yakasimba uye inoshanda pane tungsten carbide inserts dzechinyakare. Akatanga kuunzwa muma1970 uye akakurumidza kuwana mukurumbira nekuda kwekukwanisa kwawo kutsungirira tembiricha yakakwira uye kumanikidzwa mukushandiswa kwekuchera kwakadzika. Zvisinei, maPDC cutters ekutanga aiganhurirwa nekuoma kwawo uye aiwanzo pwanyika uye aiwanzo pwanyika.
Sezvo tekinoroji yaifambira mberi, vagadziri vakatanga kuyedza zvinhu zvitsva nemagadzirirwo ekuvandudza mashandiro evacheki vePDC. Chimwe chezvinhu zvakakosha kwaive kuunzwa kwevacheki vepolycrystalline diamond (TSP) vanogadzikana nekupisa. Vacheki ava vaive nedhaimani rakasimba uye vaigona kutsungirira tembiricha yakakwira uye kumanikidzwa kupfuura vacheki vePDC vekare.
Imwe nzira huru yekuvandudza tekinoroji yekucheka yePDC yaive yekuunzwa kwemidziyo yekucheka yakasanganiswa. Michina iyi yakabatanidza kugara kwenguva refu kwePDC nekusimba kwetungsten carbide kugadzira chishandiso chekucheka chaigona kubata kunyangwe mashandisirwo akaomarara ekuboorera.
Mumakore achangopfuura, kufambira mberi muhunyanzvi hwekugadzira kwakabvumira kugadzirwa kwejometri dzakaoma muzvigayo zvePDC. Izvi zvakaita kuti pave nezvigadzirwa zvekucheka zvakagadzirwa kuti zvishandiswe pakuboorera, zvakaita sekuboorera zvakananga uye kuboorera zvine simba guru/kupisa kwakanyanya.
Kushanduka kwevacheki vePDC kwave nemhedzisiro yakakura muindasitiri yemafuta negesi. Nekukwanisa kwavo kutsungirira mamiriro akaipisisa uye kugara kwenguva refu kupfuura zvishandiso zvekucheka zvechinyakare, vacheki vePDC vakawedzera kushanda zvakanaka kwekuchera uye nguva shoma yekushanda. Sezvo tekinoroji yekuchera ichiramba ichifambira mberi, zvingangoita kuti tichaona zvimwe zviri kuitika mukugadzirwa uye mashandiro evacheki vePDC.
Mukupedzisa, vatengesi vePDC vafambira mberi zvikuru kubva pavakatanga kushandiswa muma1970. Kubva pamazuva avo ekutanga senzira yakasimba yekuchinja tungsten carbide inserts, kusvika pakugadzirwa kwevatengesi vane hunyanzvi vakagadzirirwa kushandiswa pakuchera, kufambira mberi kwevatengesi vePDC kwave kunoshamisa. Sezvo indasitiri yemafuta negasi ichiramba ichichinja, vatengesi vePDC pasina mubvunzo vachatamba basa rakakosha mukusimudzira kushanda zvakanaka uye kubereka mumabasa ekuchera.
Nguva yekutumira: Kurume-04-2023
