Pehea ka nui o kāu ʻike e pili ana i ka mea ʻoki PDC?

E pili ana i ka mea ʻoki PDC (Polycrystalline Diamond Compact).

ʻO ka PDC (Polycrystalline Diamond Compact) kahi ʻano paʻakikīmea e hoʻopili ai i ke daimana polycrystalline me ka substrate tungsten carbide ma ka wela kiʻekiʻe loa a me ke kaomi.

ʻO ka mea i hana ʻia e ka mea ʻoki PDC i hoʻolalelale i kaʻoki ʻoki paʻai mua o ka ʻoihana wili, a ua kaulana koke ka manaʻo. Mai kaʻako ʻakoʻoi aku ka maikaʻi o ka hana o nā mea ʻoki PDC ma mua o ka hana ʻoki ʻana o kahi pihi a i ʻole nā ​​niho niho, nā mea ʻoki paʻa- bitmakemake nui ia.

I ka makahiki 1982, ʻo 2% wale nō ka nui o nā kapuaʻi i wili ʻia. I ka makahiki 2010, 65% o ka nui o ka wahi wili ʻia i hana ʻia e PDC.

Pehea e hana ʻia ai nā ʻokiʻoki PDC? 

Hana ʻia nā mea ʻoki PDC mai ka substrate carbide tungsten a me ka grit daimana synthetic. Hana ʻia ia me ka hui pū ʻana o ka wela kiʻekiʻe a me ke kaomi kiʻekiʻe me ka catalyst o ka cobalt alloy e kōkua i ka hoʻopaʻa ʻana i ke daimana a me ka carbide i ka wā o ke kaʻina sintering. I ka wā o ka hoʻoluʻu ʻana, ua emi ka tungsten carbide ma kahi o 2.5 mau manawa ʻoi aku ka wikiwiki ma mua o ke daimana, kahi e hui pū ai ʻo Diamond a me Tungsten Carbide a ma hope e hana i kahi ʻoki PDC.

Nā ʻano a me nā noi

No ka mea ʻo ka PDC Cutters he daimana grit a me ka tungsten carbide substrate, hoʻohui ia i nā pono o ka daimana a me ka tungsten carbide.： 

1. High abrasion resistant

2. Hpale i ka hopena

3. High thermal stable

I kēia manawa ua hoʻohana nui ʻia nā PDC Cutters i ka ʻeli ʻana i ka ʻaila, ke kinoea a me ka ʻimi ʻana i ka honua, ka eli lanahu, a me nā mea ʻē aʻe he nui a me nā noi wili, nā mea hana e like me PDC Drill Bits, e like me Steel PDC Drill Bits & Matrix PDC Drill Bits no ka ʻaila ʻaila a Tri-cone PDC Drill Bits no ka eli lanahu.

Nā palena

ʻO ka pōʻino i ka hopena, ka wela, a me ka ʻaʻahu abrasive hiki ke pale i ka hana ʻana o kahi drill bit a hiki ke loaʻa i loko o nā hoʻokumu honua palupalu. Eia nō naʻe, ʻo ka hoʻokumu paʻakikī loa no kahi bit PDC e wili ai he mau mea abrasive loa.

ʻOki liʻiliʻi VS nui

Ma ke ʻano maʻamau, ʻoi aku ka ikaika o nā mea ʻoki nui (19mm a 25mm) ma mua o nā mea ʻoki liʻiliʻi. Eia nō naʻe, hiki iā lākou ke hoʻonui i ka torque fluctuations. Eia hou, inā ʻaʻole i hoʻolālā ʻia ka BHA no ka mālama ʻana i ka piʻi ʻana o ka hoʻomāinoino, hiki ke hopena i ka paʻa ʻole.

ʻO nā mea ʻoki liʻiliʻi (8mm, 10mm, 13mm, a me 16mm) ua hōʻike ʻia e wili i ka ROP kiʻekiʻe ma mua o nā mea ʻoki nui i kekahi mau noi. ʻO kekahi o ia mea hoʻohana ʻo ia ka limestone.
Eia kekahi, ua hoʻolālā ʻia nā bits me nā mea ʻoki liʻiliʻi akā ʻoi aku ka nui o lākou hiki ke pale i ka hopena kiʻekiʻe hoouka ana. 

Hoʻohui ʻia, hana nā mea ʻoki liʻiliʻi i nā ʻoki liʻiliʻi a ʻo nā mea ʻoki nui e hana i nā ʻokiʻoki nui aʻe. Hiki i nā ʻokiʻoki nui ke hoʻopilikia i ka hoʻomaʻemaʻe puka inā ʻaʻole hiki i ka wai wili ke lawe i nā ʻokiʻoki i ka annulus.

ʻano ʻokiʻoki

ʻO ke ʻano PDC maʻamau ʻo ia ka cylinder, ʻo kekahi ʻāpana no ka mea hiki ke hoʻonohonoho maʻalahi i nā ʻokiʻoki cylindrical i loko o ke kaohi o kahi kikoʻī kikoʻī i hāʻawi ʻia e loaʻa i nā ʻokiʻoki nui. Hiki i nā mīkini hoʻokuʻu uila uila ke ʻoki a hoʻohua i nā papa daimana PDC. ʻO ka pānaʻi nonplanar ma waena o ka papa daimana a me ka substrate e hōʻemi i ke koena koʻikoʻi. ʻO kēia mau hiʻohiʻona e hoʻomaikaʻi i ka pale ʻana i ka chipping, spalling, a me ka delamination papaʻaina daimana. ʻO nā hoʻolālā interface ʻē aʻe e hoʻonui i ka pale ʻana i ka hopena ma ka hoʻemi ʻana i nā pae koʻikoʻi koena.