Kungakanani okwaziyo ngomsiki we-PDC?

Mayelana ne-PDC (Polycrystalline Diamond Compact) Umsiki

I-PDC (I-Polycrystalline Diamond Compact) Umsiki wuhlobo oluqinileimpahla ehlanganisa idayimane le-polycrystalline ne-tungsten carbide substrate ekushiseni okuphezulu nokucindezela.

Ukusungulwa kwe-PDC cutter kuqhubekisele phambili i-i-fixed-cutter bitphambili embonini yokumba, futhi umbono wavele waduma. Kusukela iukugundaisenzo sabasiki be-PDC sisebenza kangcono kunesenzo sokuchotshozwa kwenkinobho noma ibhithi elinamazinyo, abasiki abalungisiwe- kancanezidingeka kakhulu.

Ngo-1982, i-PDC drill bits yabalelwa ku-2% kuphela wezinyawo eziphelele eziboshiwe. Ngonyaka wezi-2010, ama-65% ayo yonke indawo embiwe yakhiqizwa yi-PDC.

I-PDC Cutters zenziwa kanjani? 

Ama-PDC Cutters enziwe nge-tungsten carbide substrate kanye ne-synthetic diamond grit. Yenziwe kusetshenziswa inhlanganisela yokushisa okuphezulu nokucindezela okuphezulu nge-catalyst ye-cobalt alloy ukusiza ibhondi yedayimane ne-carbide ngesikhathi senqubo ye-sintering. Phakathi nenqubo yokupholisa, i-tungsten carbide incipha ngesivinini esiphindwe izikhathi ezingu-2.5 kunedayimane, ehlanganisa i-Diamond ne-Tungsten Carbide ndawonye bese ngemva kwalokho yakhe I-PDC Cutter.

Izici kanye nezicelo

Njengoba i-PDC Cutters iqukethe i-diamond grit ne-tungsten carbide substrate, ihlanganisa izinzuzo zakho kokubili idayimane ne-tungsten carbide.： 

1. HI-igh ukumelana nemihuzuko

2. HI-igh imelana nomthelela

3. High isitebele esishisayo

Manje ama-PDC Cutters asetshenziswa kabanzi ekubholeni indawo kawoyela, ukuhlola igesi kanye ne-geological, izimayini zamalahle, nezinye izinhlelo zokusebenza eziningi zokumba nokugaya, amathuluzi njenge-PDC Drill Bits, njenge-Steel PDC Drill Bits & Matrix PDC Drill Bits yokumba uwoyela kanye I-Tri-cone PDC Drill Bits yezimayini zamalahle.

Ukulinganiselwa

Ukulimala komthelela, ukulimala kokushisa, nokuguga okulimazayo konke kuvimbela ukusebenza kwe-drill bit futhi kungenzeka ngisho nasezindaweni ezithambile kakhulu zejiyoloji. Kodwa-ke, ukwakheka okunzima kakhulu kokuthi i-PDC kancane ibholwe yizinto ezilimaza kakhulu.

Umsiki omkhulu we-VS omncane

Njengomthetho ojwayelekile, abasiki abakhulu (19mm kuya ku-25mm) banolaka kunabasiki abancane. Kodwa-ke, bangase bakhulise ukushintshashintsha kwe-torque. Ukwengeza, uma i-BHA ingaklanyelwe ukuphatha ulaka olwengeziwe, kungase kubangele ukungazinzi.

Abasiki abancane (8mm, 10mm, 13mm, kanye no-16mm) baboniswe ukuthi babhoboza ku-ROP ephakeme kunabasiki abakhulu kwezinye izinhlelo zokusebenza. Olunye uhlelo olunjalo yi-limestone.
Futhi, amabhithi aklanywe ngabasiki abancane kodwa amaningi awo angakwazi ukumelana nomthelela ophezulu iyalayisha. 

Ukwengeza, abasiki abancane bakhiqiza ama-cuttings amancane kuyilapho abasiki abakhulu bekhiqiza ama-cuttings amakhulu. Ukusikwa okukhulu kungase kubangele izinkinga ekuhlanzeni imbobo uma uketshezi lokumba lungakwazi ukuthwala okusikiwe kukhuphuke ku-annulus.

umumo womsiki

Umumo ovame kakhulu we-PDC yisilinda, ngokwengxenye ngenxa yokuthi abasiki be-cylindrical bangahlelwa kalula ngaphakathi kokuvinjelwa kwephrofayili yebhithi enikeziwe ukuze kuzuzwe ukuminyana okukhulu komsiki. Imishini yokukhipha izintambo ze-electron ingasika futhi ilolonge amatafula edayimane e-PDC. Ukuxhumana okungahleliwe phakathi kwetafula ledayimane ne-substrate kunciphisa izingcindezi ezinsalela. Lezi zici zithuthukisa ukumelana nokuqhekeka, i-spalling, kanye ne-delamination yetafula ledayimane. Eminye imiklamo yokusebenzelana ikhulisa ukumelana nomthelela ngokunciphisa amaleveli okucindezeleka ayinsalela.