Tungsten carbide Nozzle ya PDC Drill Bit

    Mabowo a PDC ndi zida zothyola miyala zomwe zimagwiritsidwa ntchito kwambiri pobowola mafuta ndi gasi, kufufuza za geological, ndi madera ena. Tungsten carbide nozzle ndi chimodzi mwazinthu zake zazikulu. Imayikidwa pabowo lamadzi la PDC drill bit, imabaya madzi obowola mwamphamvu kwambiri kuti aziziziritsa, kuyeretsa,                                                                                                                                                                                                                                                                         Kuchita kwake kumakhudza mwachindunji kubowola koma zili choncho

moyo utumiki ndi kubowola bwino.

I.  Njira Yolumikizira Nozzle:

    Iyenera kufanana ndi dzenje lamadzi la PDC drill bit. Kulumikizana kofala ndi kulumikizana kwa ulusi (kunja kapena mkati, ndi kulondola kwa 3A-grade to

    onetsetsani kuti palibe kutayikira pansi pa kuthamanga kwambiri). Timphuno tating'ono tating'onoting'ono timagwiritsa ntchito chosokoneza (kusindikiza-fit), chomwe chimalepheretsa kumasula mukatha kuyika.

II. Makhalidwe a Nozzle: Tungsten Carbide (WC)

    1. Kulimba Kwambiri ndi Kukaniza Kuvala: Kulimba kwa Tungsten carbide ndi kwachiwiri kwa diamondi, kumapangitsa kuti zisawonongeke ndi tinthu tating'onoting'ono tamadzimadzi obowola (monga mchenga ndi zinyalala zazitsulo), kukulitsa moyo wamphuno.

    2. Kukaniza kwa dzimbiri: Imalimbana ndi dzimbiri kuchokera ku zinthu zina zamadzimadzi zobowola (monga mchere ndi zidulo).

    3. Kukaniza Kwamphamvu: Tungsten carbide nthawi zambiri imagwiritsa ntchito cobalt (Co) ngati

binder, kupereka mlingo wina wa kulimba ndi kuteteza fracture brittle.

III. Carbide Nozzle Structural Design Features

    1. Kubowoleza Kwamkati: Kumachepetsa chipwirikiti komanso kumapangitsa kuti madzi aziyenda bwino. Mitundu yodziwika bwino ndi:

    2. Bore Lolunjika: Losavuta komanso lokhazikika, loyenera kubowola wamba.

    3. Venturi: Kapangidwe kamene kamasinthira kumawonjezera kuthamanga kwa kuthamanga ndikuwonjezera kuchotsedwa kwa chip.

    4. Makulidwe Osiyanasiyana: The nozzle m'mimba mwake (kawirikawiri 6-16mm) amasankhidwa malinga ndi kubowola madzimadzi otaya mlingo ndi chofunika jekeseni liwiro.

    Mapangidwe Osinthika: Palibe chifukwa chosinthira chobowola chonse mutatha kuvala, kuchepetsa mtengo wokonza.

IV. Ntchito zazikuluzikulu za tungsten carbide nozzles ndi izi:

    1. Kuziziritsa Odula

Odula a PDC drill bit amapanga kutentha kwakukulu pamene amazungulira mothamanga kwambiri kuti adule miyala.  Kutentha kwambiri kungayambitse carbonization ndi kulephera kwa diamondi wosanjikiza. Madzi obowola othamanga kwambiri otulutsidwa mu nozzle ya tungsten carbide amachotsa kutentha kumeneku, kuonetsetsa kuti choduliracho chizikhala chotetezeka   (kawirikawiri pansi pa  700°C)  ndi kupewa kuwonongeka kwa kutentha.

    2. Kuyeretsa Mwala Zodula

Zodulidwa za miyala zomwe zimapangidwa panthawi yodula zimatha kudziunjikira mozungulira odulawo, zomwe zimapangitsa "kuponya matope" (kusakaniza kwa ma cuttings ndi kubowola madzi kumamatira pobowola), kuchepetsa mphamvu yoswa miyala. Ndege yamadzi othamanga kwambiri kuchokera pamphuno imabalalitsa ndikuchotsa zodulidwazo, ndikusunga kulumikizana koyenera pakati pa wodula ndi thanthwe.

    3. Hydraulically Assisted Rock Breaking

Ndege yochokera kumphuno (pa liwiro la 100-200 m / s) imakhudza thanthwe, ndikupanga ming'alu ya hydraulic. Izi synergistic zotsatira, pamodzi ndi mawotchi kudula zochita za odula, amachepetsa thanthwe kuswa kukana, kwambiri kuwonjezeka lolowera liwiro, makamaka molimba mapangidwe.

V. Mapulogalamu

Carbide nozzles amagwiritsidwa ntchito makamaka pazinthu izi:

    1. Mapangidwe ofewa mpaka apakati-olimba, monga shale ndi miyala ya laimu, komwe amathandizirana ndi kumeta koyenga bwino kwa tizibowo ta PDC.

    2.  Zitsime zakuya/zopingasa zimafuna kupopa kwambiri komanso kuwongolera koyenera kwa ma hydraulic, pomwe kudalirika kwa milomo ya tungsten carbide ndikofunikira.

    3.  Mapangidwe onyezimira kwambiri, monga mwala wa mchenga wa quartz, amathandizira kuti asavale bwino poyerekeza ndi milomo yachitsulo ya alloy.