UKhetho oluLungileyo lweeBits zePDC zokumbiwa kwamalahle
Ukwakhiwa kwamaqula yindlela yobugcisa esetyenziswa ngokubanzi kulawulo lwerhasi, ukuthintela ukonakaliswa kwamanzi, kunye nokuhlolwa komhlaba kwimigodi yamalahle, nto leyo edlala indima ebalulekileyo ekuqinisekiseni ukhuseleko nokusebenza kakuhle kwemveliso yamalahle. E-China, amashumi ezigidi zeemitha zemingxuma yokugrumba yenziwa ngonyaka kwimigodi yamalahle. Inkqubo yokwakha ifuna inkxaso yezixhobo zokomba ezifana nokubhobhoza, imibhobho yokubhobhoza, kunye neebhithi zokomba. Phakathi kwazo, u-drills zizixhobo ezibalulekileyo zokwenza imingxuma ngokuthe ngqo kunye nokuqhekeza amatye.
Icwecwe le-Poly crystalline diamond composite sheet (PDC) lisetyenziswa kakhulu kwimingxuma yokomba ngenxa yokunganyangeki kwayo okungaqhelekanga kunye nokuqina kwayo okuncomekayo.Amasuntswana ePDCbonisa ubomi obude bokugrumba kunye nokuphakama kokungena kokuchaneka xa beqeshwe kulwakhiwo oluphakathi-lukhuni kunye nolusezantsi, ngaloo ndlela bevelisa inzuzo enkulu yezoqoqosho kwimisebenzi yokomba imigodi yamalahle. Xa kuthelekiswa nokugrumba i-oyile, ukugrumba amalahle kuneempawu zobugcisa zokonga imali, ukusebenza ngexesha, kunye neemfuneko ze-DC ezixineneyo ziyilwe ngokugqithisileyo. ngenkani.
Imingeni ekhoyo ngoku ejongene nemigodiAmasuntswana ePDCzibandakanya: ①Umda wokungeniswa kwimigodi yePDC usezantsi noko, kunye nenkitha yabavelisi abanikezela ngamanqanaba awohlukeneyo kumgangatho. ②Ukusetyenziswa kunye neemfuno zokomba ngaphantsi komhlaba kwimigodi yamalahle zibonisa iiyantlukwano ezicacileyo, ngelixa ulwahlulo lwamasuntswana e-PDC emigodini luntsonkothile kwaye lwahlukene. Ngaphaya koko, kukho ukunqongophala kwemimiselo yokhetho olucwangcisiweyo nengqiqweni kwinkqubo elandelayo yokusetyenziswa.③Ngokwanda kokuxhaphaka kobunzima obuntsonkothileyo kwimigodi yamalahle, amasuntswana e-PDC emigodini eqhelekileyo ayasilela ukuhlangabezana neemfuno zolwakhiwo olusebenzayo lokomba kwisiza, okukhokelela kwiimeko zenkqubela-phambili ecothayo okanye nokunqongophala okupheleleyo kweemeko ezingqongqo kulwakhiwo olungqingqwa.④ kwiinkqubo zokomba ngabasebenzi bokwakha ngamanye amaxesha kunokuba nzima.
Ukuze kuphuculwe impumelelo yokusebenza kwemigodiAmasuntswana ePDC, eli phepha linika uhlalutyo olubanzi lweendlela eziphambili zokungaphumeleli kwaye liphanda izizathu ezisisiseko zendlela nganye yokungaphumeleli. Ukongeza, iingcebiso ezisebenzayo ziyacetywa ukuze kukhethwe ngobulumko kunye nokusetyenziswa ngononophelo kwezi bits.
1.Uhlalutyo lweFomu kunye neZisusa ze-PDC Bit Failure kwiMigodi
Okwangoku, iikhomponenti zeebhithi ze-PDC zemigodi ngokuyintloko ziquka i-bit body, i-PDC cutters, i-alloys ye-gauge, kunye namanye amalungu njengoko kubonisiwe kwi-Figure 1. I-PDC cutters kunye ne-alloys ye-gauge ziboshwe kwi-bit body ukuze ziqinisekise ukuncamathelwa kwazo okukhuselekileyo. Ngexesha lemisebenzi yokugrumba rhoqo, intonga ye-drill ihambisa i-torque kunye noxinzelelo lwesondlo ukuya ezantsi komngxuma apho idibana khona ne-drill bit. Inkqubo yokusika amatye ifezekiswa ngokusetyenziswa kwee-PDC cutters kwi-drill bit. Ukongeza, ii-alloys zegeyiji zikhusela ekunxityweni ngokugqithisileyo ngokukhusela isidima esijikelezayo somzimba omncinci. Nangona kunjalo, kufuneka kuqatshelwe ukuba izinto ezahlukeneyo ezinje ngemikhosi entsonkothileyo eyenziwe kwi-cutter emngxunyeni osezantsi ngexesha lokusikwa kwamatye nge-PDC bit, utshintsho kwiimpawu zokwakheka, ukhetho lobuchule bokwakha kunye nezixhobo, ubuchule bokusebenza kwabasebenzi ababandakanyekayo kwimisebenzi yokwakha kunye nemilinganiselo yokulawula umgangatho wamasuntswana ngokwawo inokuchaphazela kakhulu ukusebenza kwesicelo okukhokelela kwiindlela ezahlukeneyo zokusilela kwezi bits. Ngophando olwenziwe kwiindawo zokomba imigodi yamalahle, siye sashwankathela kwaye sahlalutya iindlela ezahlukeneyo zokungaphumeleli kunye nezizathu eziphambili ezinxulumene noku.Amasuntswana ePDC.
1.1 Ukungaphumeleli kwe-PDC cutter kwenzeka xa i-PDC ifakwe phantsi kweqondo lokushisa eliphezulu kunye neemeko zoxinzelelo oluphezulu. Iphepha elihlanganisiweyo liqukethe izinto ezimbini eziphambili: umaleko wedayimane kunye ne-carbide matrix, njengoko kubonisiwe kuMfanekiso 2.
Iindlela eziphambili zokungaphumeleli zabasiki bePDC zibandakanya ukunxiba okuqhelekileyo, ukugqabhuka, ukuwa kweblade, kunye ne-delamination.
(1) Ukugqojozwa rhoqo
Isenzeko sokunxiba okuqhelekileyo luhlobo lomonakalo oqhelekileyo owenzeka kubasiki bePDC ngexesha lenkqubo yokusika amatye, eyona nto ibonakaliswa yilahleko enkulu yokusila kuyo yomibini umaleko wedayimane kunye ne-samente ye-carbide matrix yabasiki, ngaphandle kwemikhondo ecacileyo yokuqhekeka kwindawo yokusila.
(2) Ukuwisa itshiphu
Isenzeko sokuwa kwetshiphu kwenzeka xa abasiki bePDC besuka kumzimba omncinci, okukhokelela kukusilela. Olona phawu lubalaseleyo kukwahlulwa ngokupheleleyo kwabasiki bePDC kumzimba kancinane, kungekho ntsalela yengxubevange efunyenwe emhadini apho ukuwelda phakathi kwebit body kunye nabasiki bePDC kwenzeka.
Izinto eziphambili ezinegalelo ekwehleni kwefilimu ewayo:
① Amaqondo obushushu aphakamileyo emazantsi equla akhokelela kumceli mngeni wokwakhiwa kobuchwephesha bokugrumba okomileyo okanye ukubunjwa kweplagi yamanzi ngexesha lenkqubo yokugrumba, ngeli lixa kuthintelwa ukupholiswa kwangexesha kwee-PDC cutters kwi-drill ngexesha lokusika amatye ajikelezayo ngesantya esiphezulu. Ngenxa yoko, kukho ukunyuka okubalulekileyo kwiqondo lokushisa kumngxuma osezantsi, onokuthi udlule ubushushu obubalulekileyo be-solder kwaye kubangele ukunyibilika kwe-solder kunye ne-detachment elandelayo ye-PDC cutters.
② Ulawulo lwenkqubo ye-welding ye-drill ayingqongqo ngokwaneleyo. Kwinkqubo ye-welding, kukho ukungabikho kokucocwa okufanelekileyo ngaphambi kokuthunga, i-welds ephosakeleyo okanye ukulawulwa kwegesi engafanelekanga, kunye nokushisa okungekho ngqiqweni kokugcinwa kokushisa okanye ixesha elaneleyo emva kwe-welding, konke oku kunokubangela ukuchithwa kwe-bit. Ngaphandle kokufuna abavelisi ukuba balawule ngokungqongqo inkqubo yokuvelisa (ingakumbi inkqubo ye-PDC cutter welding welding) ukuze kuqinisekiswe i-welds epheleleyo kunye neqinile, kuyafuneka kwakhona ukucacisa inkqubo yokwakhiwa kwe-drilling ngokukhetha ukubhobhoza kwamanzi xa kunokwenzeka kwaye ugweme ukwakhiwa kwe-drilling eyomileyo. Ukugrumba umngxuma onzulu, kufuneka kuqinisekiswe ukuba amanzi abuyayo phambi kokuba wongeze ukugrumba intonga. Ukongeza, ixesha ngalinye ngaphambi kokufaka i-drill emazantsi embobo, kubalulekile ukujonga ukuba kukho naziphi na izithintelo ukuze kuthintelwe ukuvaleka.
(3) Ukuqhekeka kweblade
Ukuqhekeka komgangatho wedayimani kwi-PDC cutters kubonisa indlela exhaphakileyo yokusilelaAmasuntswana ePDC. Uphawu lweempawu zale modi yokusilela kukugqabhuka kwendawo yomaleko wedayimani, ngezinye iimeko ezikhokelela ekuqhekekeni kwangaxeshanye ecaleni kwe-matrix ye-carbide.
Ezona zizathu ziphambili zokuqhekeka kancinci kwePDC:
① Umsiki okhethiweyo ngokusekelwe kwiimpawu zendalo ze-PDC cutter ubonisa ukuxhathisa kwempembelelo ephantsi. Amandla adibeneyo e-tungsten carbide (WC) kunye ne-diamond micro-powder ayanelanga, okwenza kube lula ukusilela phantsi koxinzelelo lokuqhekeka kwamatye;
② Izinto ezinxulumene nenkqubo yokwakha zibonisa ukuba uxinzelelo lokwakhiwa kwendawo luphezulu kakhulu. Uxinzelelo olwenziwa yi-PDC cutter kwi-bit ngokuphawulekayo lugqithise umda woxinzelelo lomsiki, okukhokelela ekuqhekekeni koqweqwe lwedayimane kunye nokuwa okulandelayo komphetho wokusika.
③ Izinto ezinxulumene nokwakheka okuntsokothileyo zibonisa ukuba ngexesha lolwakhiwo lwezakhiwo eziqinileyo, ezaphukileyo, umthwalo wempembelelo kubasiki bePDC udlula ukuqina kwempembelelo, enokukhokelela ekuweni komphetho wokusika.
④ Uyilo lwe-bit angle yokusika alunelanga, njengoko ingahambelani nomgaqo wokuba ukubunjwa okunzima kufuna i-angle yokusika enkulu. Ekwakhiweni kokwakheka okunzima, i-angle encinci yokusika ingabangela amandla amaninzi kwi-PDC cutter, ekugqibeleni ikhokelela ekuweni komgca wokusika.
⑤ Eminye imiba ibonisa ukuba ulungiselelo lweebholithi ezixhasayo kunye neentambo zeankile kwiindlela eziphantsi komhlaba zenza kube lula ukuba i-drill bit idilike xa idibana nezi zinto. Ukuthintela ukungaphumeleli kwebit, kubalulekile ukuba ungagcini ngokungqongqo kwiiparameters zenkqubo ezichazwe kwincwadana yomyalelo wokomba kodwa kunye nokuyila kunye nokukhetha i-drill ngokusekelwe kwiimeko zokwakheka. Ngokukodwa, xa kugrunjwa kwiindlela ezinzima, kuyacetyiswa ukuba ukwandise i-angle yokusika yebit ngokufanelekileyo, ukunciphisa ubundlongondlongo bayo, kunye nokwandisa ukhuseleko kwi-bit. Ukongeza, ukukhetha abasiki bePDC abanokuqina kwempembelelo ephezulu kuyacetyiswa xa kusetyenzwa ngolwakhiwo oluqinileyo okanye ukuguqula imilo yangaphandle yomaleko wedayimane yomsiki ukuphucula ukuqina kwempembelelo; umzekelo, abasiki bePDC abagobileyo ngokubanzi babonisa ukuchasana kwempembelelo engcono kuneentlobo ezisicaba. Ngaphaya koko, ulungiselelo olufanelekileyo lwemingxuma ngexesha lolwakhiwo kufuneka luphunyezwe ukuthintela ukugrunjwa kwiibholithi kunye neentambo zeankile.
(4) Ukupheliswa
I-Delamination ibhekiselele ekudibaneni komgangatho wedayimani ukusuka kwimatrix ye-carbide enesamente kumaphepha adibeneyo ePDC, njengoko kubonisiwe kuMfanekiso 3.
Oyena nobangela uphambili wokudilika kumaleko wedayimane wePDC abasiki bezinto luxinzelelo olukhulu olushiyekileyo olukhoyo phakathi komaleko wedayimani kunye nesamente ye-carbide matrix, idityaniswa nomahluko omkhulu kwi-coefficients yokwandiswa kobushushu. Ngexesha lokusikwa kwamatye, umaleko wedayimani kunye nesamente ye-matrix ye-carbide ifumana ukucutheka kwe-asynchronous ngenxa yoxinzelelo lwe-thermal oluveliswa bubushushu obukhukhulayo kunye nokupholisa kumanzi okuhlamba. Isiphumo somthwalo wempembelelo kunye noxinzelelo olushiyekileyo lukhokelela ekuxovuleni umaleko wedayimani ukusuka kwimatrix ye-carbide, ekugqibeleni kukhokelele kukusilela kwe-drill bit. Ukunciphisa i-delamination, kubalulekile ukukhetha izixhobo ezifanelekileyo zokudibanisa kunye nokucubungula itekhnoloji ejongene noxinzelelo lwentsalela phakathi kwala macandelo mabini ngexesha lokuvelisa. Ukongeza, ukuyila imilo yojongano olutsha lwematrix kunokuphucula iipropathi zokudibanisa phakathi komgangatho wedayimani kunye nesamente ye-carbide matrix.
1.2 Ukungaphumeleli komzimba we-drill kubonakala ngokuyinhloko kukuqhekeka kwe-blade kwi-drill body, njengoko kubonisiwe kuMfanekiso 4.
Ukuqhekeka kweblade kumzimba omncinci kwenzeka kakhulu kumzimba kwaye intsimbi yomzimba ayifane yenzeke. Izizathu zokophuka kwencakuba yesuntswana lomzimba zezi zilandelayo: ① Ukubetha iblade yomzimba kancinane xa ukhulula isuntswana lomzimba ngenxa yokuba isithsaba somzimba wesuntswana sirhaxwa yinkqubo yesinyithi somgubo ngexesha elinye. xa kuthelekiswa nentsimbi yomzimba eqhelekileyo. intwana yomzimba inokumelana nokunxiba okuphezulu. kodwa ukuqina kwesixhobo somzimba kuncipha ngokuhambelanayo kwaye kulula ukuqhekeza i-blade ye-bit body xa ukhulula i-bit body; ② Ulawulo lwenkqubo ye-bit sintering alukho ngqongqo. kwaye i-sintered bit body is entrainment kwaye umgubo wentsimbi uyasilela ukwenza ialloy.Ukuze uphephe ukuqhekeka kweblade. umsebenzisi ubenezixhobo ezingcono zokusebenzisa izixhobo ezifana neepliers zamazinyo ukuncedisa ityayile xa ukhulula i-drill. ukuze uphephe ukunkqonkqoza incakuba; Okwesibini. abavelisi kufuneka balawule ngokungqongqo umgangatho womzimba we-sintered. hayi kuphela ukulawula ngokungqongqo inkqubo sintering. kodwa kwakhona ukubeka esweni umgubo wesinyithi amaxesha ngamaxesha ukuqinisekisa ukuba umgubo uyahlangabezana neemfuno zenkqubo.
2. Uyilo oluLungileyo kunye noKhetho olunengqiqo lweBit yePDC yeMigodi
2.1 Uyilo lokuphucula i-drill bit
(1) Kwifomu yokungaphumeleli kwe-bit, kuyimfuneko ukunyusa isakhiwo sayo kwi-drill design. Iiparamitha zoyilo eziphambili ze-PDC bit ziquka ukusika i-Angle α. iEngile yecala β. i-azimuth engile γ. njl.njl. γ ibhekisa kwi-Engile phakathi komgca wesalathiso wokuqhelaniswa namazinyo ePDC kunye nomgca osembindini webit. I-α ibhekisela kwi-Angle phakathi komgca wesalathiso sokuqhelaniswa nezinyo le-PDC kunye nendiza yokusebenza yomsiki. njengoko kubonisiwe kuMfanekiso 5. β ibhekisa kwiAngle phakathi kwenqwelomoya kwindawo esembindini kunye nomgca ophakathi webit kunye nendiza yokusebenza yomsiki. njengoko kuboniswe kuMfanekiso 6. Uphando lwangaphambili kunye nohlalutyo olubanzi lwesicelo lubonisa ukuba i-Angle yokusika kunye ne-Angle yecala ye-PDC cutters inokuchaphazela ngqo ubomi kunye nokusebenza kakuhle kwe-drilling ye-bit. kwaye kuyimfuneko ukukhulisa uyilo lwebit ngokweendlela ezahlukeneyo zokomba. Uyilo lwe-Angle yokusika luya kuchaphazela kakhulu ukusebenza kakuhle kokomba. okanye akukho mboniso kwaphela; Ukuba i-Angle yokusika incinci kakhulu. i-PDC yokusika i-edge ijwayele ukuphuka kunye nezinye izinto. Ngoko ke. uyilo lwe-drill kufuneka luqwalaselwe ngokubanzi xa ukhetha i-parameter scheme ngokukhetha i-Angle yokusika ephakathi kunye ne-Angle yecala kunokuba uyilo oluzenzekelayo.
(2) Ukongeza ekuphuculeni i-angle yokusika yebit, kubalulekile ukuba ukwandise abasiki bePDC. Umgangatho wabasiki bePDC uchaphazela kakhulu imigodi yePDC, njengoko imisela ngokuthe ngqo ukusebenza kwabo kokusika kunye nobomi. Eyona nto ibalulekileyo ekuphuculeni umgangatho wePDC kukupheliswa koxinzelelo olushiyekileyo kwikhonkco elidibanisayo phakathi komgangatho wedayimani kunye nesamente ye-carbide matrix. Uphando lubonisa ukuba uxinezeleko olukhulu kubasiki bePDC abanobume bojongano olucwangcisiweyo lugxininiswe kufutshane namacala omabini olu jongano, kunye noxinzelelo oluphezulu kunye noxinzelelo lokucheba olwenzeka kumda womaleko wedayimani. Ubukho boxinzelelo lokuqina bunokukhokelela ekuqhekekeni okungaqhelekanga kwi-PDC, ngelixa uxinzelelo lwe-chear lusebenza njengesona sizathu siphambili sokudityaniswa kubasiki bePDC.
(3) Ukongeza ekupheliseni uxinzelelo olushiyekileyo kwi-PDC cutters, unyango lwesibini lunokuphucula ngakumbi umgangatho wabo. Okwangoku, iindlela eziphambili zonyango zomphezulu zibandakanya ukusila komphezulu wedayimani, ukuchachaphaza komphetho, kunye nomatshini omile. Ukhetho lwabasiki bePDC lunokuphuculwa ngokusekelwe kwiimeko zokusebenza zangempela.
2.2 Ukukhetha okunengqiqo kweebhithi zokubhola
Okwangoku, amasuntswana ePDC asetyenziswa kwimisebenzi yokugrumba emngxunyeni kwiindawo ezininzi zemigodi ikakhulu abonisa uyilo olunamaphiko amathathu econcave. Nangona kunjalo, ukhetho lwala mabhithi luhlala lulinganiselwe kwaye lunqongophele ukuhlelwa, okukhokelela kwindlela yokulinganisa yonke into engakwaziyo ukujongana neemfuno ezithile zoluhlu oluhlukeneyo. Oku kuyingxaki ngakumbi phantsi kweemeko ezintsonkothileyo zokwakheka, apho amasuntswana e-concave eqhelekileyo asokola ukuhambisa umsebenzi owanelisayo, okukhokelela kubomi obufutshane obufutshane kunye nokuncipha kobuchule bokomba. Ukungasebenzi kakuhle okunjalo akupheleli nje ekunyuseni iindleko zemveliso kodwa kusenokuphazamisana neeshedyuli zokwakha kwaye kubangele ilahleko enkulu kwezoqoqosho. Ke ngoko, kuyafuneka ukuba ukhethe amasuntswana okomba afanelekileyo alungiselelwe iimeko ezahlukeneyo zokubunjwa.
Amasuntswana e-PDC emigodi anokwahlulwa abe ziindidi ezimbini eziphambili ngokusekwe kumzimba kancinane: uhlobo lwentsimbi kunye nohlobo lwetayara. Imizimba yohlobo lwentsimbi icutshungulwa ngokuyintloko ngeendlela zoomatshini, ibonelela ngokuqina okulungileyo okubenza bafanelekele imisebenzi eqhelekileyo yokwemba. Ngokwahlukileyo koko, imizimba yohlobo lwamatayara iyatshizwa kusetyenziswa iinkqubo zesinyithi somgubo, inika ukuxhathisa okuphakamileyo kokugrumba amatye okanye imisebenzi yokwemba eyandisiweyo. Ukongeza, amasuntswana okomba anokwahlulwa ngokwezakhiwo ezahlukeneyo, kubandakanywa iconcave yangaphakathi, ikona yearc, umzantsi osicaba, iscraper, kunye nezinye njengoko kubonisiwe kumfanekiso wesi-7. ②Ilungiselelo lezinyo elisasaziweyo le-arc bit libangela ukuxinana kwamazinyo okuphezulu kunye nokuphucula ukusebenza kakuhle kokomba xa usebenza ngobunzima obuphakathi nangaphezulu; ③Imilo yomlomo wesuntswana elimcaba-phantsi liphantse lacaba, elilola iincam zalo ezisemacaleni ukuze kube lula ukutsheka-olu yilo lusetyenziswa kakhulu ekugrunjweni okuqondisayo; ④Intwana ye-scraper ibonakalisa ubume be-conical enika ubundlongo-ndlongo obukhulu kwaye isetyenziswa ikakhulu kulwakhiwo oluthambileyo lwestrata okanye kwimithungo yamalahle.
Amasuntswana e-PDC akhoyo ngoku ashwankathelwe kwaye acwangciswa, kunye nenqobo yokukhetha yamasuntswana e-PDC phantsi kweemeko ezahlukeneyo zokusebenza nokwakheka, njengoko zithiwe thaca kwiThebhile 1 ukuze kubhekiselwe kuyo.
3. Ukusetyenziswa kweMigodi yePDC Bit Precautions
Ukongeza ekukhetheni ngononophelo i-drill bits, kubalulekile ngokufanayo ukusebenzisa ngokufanelekileyo ezi zixhobo. Ngenxa yemiceli-mngeni yeemeko zokwakha kwimigodi yamalahle, abasebenzi basoloko besokola ukubambelela ngokungqongqo kwizikhokelo zePDC bit, okukhokelela kwiimeko ezininzi zokusilela ngenxa yokuphathwa ngendlela engafanelekanga. Kwiinzame zokuphucula ukusebenza kakuhle kokugrumba, ezinye iindawo zemigodi zinokwandisa ngokungakhethi ubunzima bobunzima ngexesha lokusebenza, okukhokelela kukusilela kwangaphambi kwexesha. Ukusebenzisa ngokuchanekileyo amasuntswana ePDC kunokwandisa ukusebenza kwawo kunye nokunciphisa iindleko zemveliso. Ingqalelo kufuneka inikwe kwezi ngqwalasela zilandelayo xa usebenzisa amasuntswana ePDC:
(1) Nikela ingqalelo kubudlelwane bokuhlelwa phakathi kwebityi yePDC kunye nesixhobo sokomba, ukuqinisekisa ukuba umbhobho wokomba omkhulu olingana nobukhulu awuhambelani nombhobho wokomba omncinci kakhulu, kunye nombhobho wokubhola odayamitha omncinci awudityaniswanga nentwana enkulu yokomba.
(2) Eyona ndlela ilungileyo kukusebenzisa umngxuma okhethekileyo okanye intwana yokugrumba endala ekwakhiweni kwendlwane, ngeli lixa uqinisekisa ukuba inkqubo yokomba iyayinqanda indawo ekufutshane neebholiti ezisecaleni kwendlela, iintambo zeankile, kunye nezithintelo ezifanayo.
(3) Xa uqhuba imisebenzi yokomba, kubalulekile ukulawula uxinzelelo lwesondlo ukuze kuthintelwe iingozi ezibangelwa kuxinzelelo olugqithisileyo ngaphakathi kwequla.
(4) Nceda usebenzise indlela yokomba amanzi acocekileyo, uyeka ukugrumba okomileyo okanye ukugrumba umoya. Ngaphambi kokuba uqalise ukusebenza koxinzelelo lokomba, qinisekisa ukujikeleza kwamanzi okufanelekileyo ngaphakathi komngxuma ukuthintela izehlo ezinokutsha ezinokutsha kwisiseko sawo.
(5) Xa ususa isuntswana, qinisekisa ukuba uyakuphepha ukucinezela okanye ukubetha i-PDC cutter. Ukongezelela, qaphela ukuba ungabetheli i-blade yomzimba we-bit.
4. Isiphelo
Ukombiwa kwamalahle ngokukhuselekileyo nokusebenzayo kohlaza bekusoloko kungumxholo okhuthazwa lushishino lwamalahle. Ukusebenzisa ngokufanelekileyo amasuntswana ePDC kukomba ophantsi komhlaba kwimigodi yamalahle kubaluleke kakhulu. Eli phepha lihlalutya iindlela zokungaphumeleli kwemigodi ye-PDC bits, ukucacisa izizathu eziphambili emva kweefom ezahlukeneyo zokungaphumeleli. Indulula uyilo olulolona kunye nobuchule bokukhetha amasuntswana phantsi kweemeko zokusebenza ezahlukeneyo kunye nokwakheka komhlaba, ngelixa ishwankathela amanyathelo okhuseleko okusetyenziswa kwazo, ngokwenjenjalo ibonelela ngereferensi yokukhethwa okuphuculweyo kunye nokusetyenziswa kwemigodi yePDC. Ukhetho olunengqiqo kunye nokusetyenziswa ngokufanelekileyo kwamasuntswana e-PDC emigodini kunokwandisa ukusebenza kwawo, kucuthe inkcitho yobutyebi, kwaye kwandise ukhuseleko, ukusebenza kakuhle, kunye nezenzo ezihambelana nokusingqongileyo emigodini yamalahle.