Ipayipi lokubhoboza

Ipayipi lokubhobozaiyinsimbi yokubhoboza ishubhu eneziphetho eziphazamisekile kanye namajoyinti amathuluzi ashiselwe, akhiqizwa futhi ahlolwa ku-API Spec 5DP ukuze ukuthengwa kwempahla kukhiye ukwamukela, ukulandeleka, nokwenza{1}}ukuthembeka ngaphambi kokuba ipayipi lifike endaweni yokulungisa izinto.

Njengomkhiqizi wamapayipi okubhoboza, i-Octal Pipe igxile kumaphuzu okuhluleka alawulekayo-ithuluzi lokushisela ngokuhlanganyela, ubuqotho bentambo, kanye nokuthunyelwa{1}}kumarekhodi ngeleveli yokuthunyelwa{2}}ngoba ukubambezeleka okuningi kuqala ekuxhumekeni, hhayi emzimbeni wamapayipi.,Ipayipi lokubhoboza le-Octal Pipe likhiqizwa ngokuhambisana ne-API1 ye-API ye-Special 7 imizimba ye-API1 ye-API Spec7, drill stem elements, kanye ne-API Spec 7-2 yokuxhumana okuhlangene kwethuluzi. Lokhu kuqinisekisa amandla emishini, ukunemba kwe-dimensional, kanye nokushintshana ngemishini yokumba yamazwe ngamazwe.

Ngokwemibandela yokuthenga kwangempela, izinkinga zamapayipi okubhoboza ngokuvamile aziqali umgodi-ziqala ngawo.okungacacile kwe-PSL/ububanzi bebanga, ukuxhumana okungafani/amalunga amathuluzi, namarekhodi okuhlola angekhoamasheke angenayo ahamba kancane futhi adale ukubambezeleka kwe-rig{0}}eceleni. I-Octal inikeza i-API 5DP drill pipe njenge-ukwamukelwa{0}}iphakheji elungile: sula okokufaka kwe-RFQ (usebenzisa i-API RP 7G njengesithenjwa sokukhetha), ububanzi bokuhlola obuchaziwe, kanye nephakethe ledokhumenti elinciphisa ukusebenza kabusha nokuphikisana kamuva.

Amapayipi okubhoboza awuchungechunge olusebenzayo oluxhuma isistimu ye-rotary engaphezulu nebhithi kanye ne-bottomhole assembly (BHA). Ekubholeni okuvamile, lenza imisebenzi emithathu ngesikhathi esisodwa. Okokuqala, idlulisa itorque ejikelezayo ne-RPM isuka kudrayivu ephezulu noma ithebula le-rotary ngokusebenzisa-uxhumano oluhlangene ukuze ujike kancane. Okwesibili, ithwala i-axial load ({4}}ku-bit) futhi iyagoba njengoba umgudu womthombo ushintsha futhi intambo ithinta imbobo. Okwesithathu, isebenza njengomzila wokucindezela woketshezi lokumba: udaka luphonswa phansi ngepayipi lokubhoboza emibhobolweni encane, bese lubuyisela phezulu i-annulus ukuthutha okusikiwe, ukulawula ukucindezela, ukupholisa kancane, nokusimamisa imbobo.

Ngenxa yokuthi indawo ye-downhole ayizinzile-isimo, intambo yokubhoboza ihlale ibhekene nezimpendulo eziguqukayo ezivela kumfanekiso: i-axial vibration kanye nokushaqeka (bit bounce), ukudlidliza kwe-lateral nomthelela (ukugoba nokuthintana nodonga), nokudlidliza kwe-torsional. Ukudlidliza kwe-Torsional kungase kuthuthuke kube i-stick-slip, lapho i-bit ihamba kancane noma izitebele ngenkathi ukuzungezisa kwendawo kuqhubeka, bese idedela ngokuzumayo-kudala itorque ephezulu futhi isheshise ukukhathala ezindaweni ezixhumeneyo nasezinguqukweni. I-Bit whirl ukungazinzi kwe-lateral lapho ibhithi/i-BHA idlulela khona eduze komugqa ophakathi nendawo; i-whirl eya phambili nangemuva ichaza amaphethini ahlukene wokuzungezisa/ukuxhumana futhi ingashayela ukuguga okusheshayo kokusika kanye nokulimala kokuxhumeka. Yingakho ukukhetha nokuhlolwa kwamapayipi okubhoboza kuqhutshwa ubuqotho bokuxhuma, ukungaguquguquki kobukhulu, nokulandeleka, hhayi nje i-OD nokuqina kodonga.

Yakhelwe umkhiqizi wamapayipi okubhoboza ku-API Spec 5DP ukuze ukuthengwa kwempahla kukhiye ukwamukela, ukushisa-kuya{2}}kulandeleke okuhlangene, futhi kwenze{3}}ukuthembeka ngaphambi kokuba ipayipi lifike emshinini.

Bamba Amasayizi Amapayipi

I-API 5DP Drill Pipe Specification (Amabanga, Osayizi, Izixhumi)

• Ukukhethwa kwebanga: Qondanisa i-E75/X95/G105/S135 netorque elindelekile, ukushuba, kanye nohlelo lokujula kokumba.
• Imithombo emuncu / ebolayo: Isimo sokuthambekela kwe-CO₂/H₂S ukuze izinketho zokuvikela kanye nobubanzi bokuhlola buqondaniswe (uma kucacisiwe).
• Ukulawula ubungozi boxhumano: Khetha uhlobo oluhlanganyelwe lwethuluzi futhi wenze{0}}uzijwayeze ukunciphisa inyongo nokulimala kwamahlombe.
• Ukuthola ukucaciseleka: Kudinga{0}}ukuhlonza okuhlanganyelwe kweleveli + uhlu lokupakisha ukuze uthole izibalo ezisheshayo nokwamukelwa kwegceke.

I-Octal Pipe ilandela ukulandelana kokukhiqiza okuqinile nokulandelekayo ukuze kuqinisekiswe ubuqotho bemishini kanye nokumelana nokukhathala:

1. Ukwenza insimbi & neTube Rolling

• Amashubhu ensimbi angenamthungo (35CrMo, 40Cr, 4137H, 4145H) anamakhemikhali alawulwayo.
• Ukuphonsa nokubhoboza okuqhubekayo kuqinisekisa ukwakheka okusanhlamvu okufanayo.

2. Ukucasula

• Iziphetho zepayipi ziyashisisa futhi zenziwe ngomumo we-Internal Upset (IU), External Upset (EU), noma-Okungezwani Kwangaphandle (IEU).
• Ukucasula kukhulisa-indawo yesigaba sokushisela ngokuhlanganyela kwamathuluzi, kuthuthukisa amandla okuxhumana.

3. Ukwelashwa Kokushisa

• Ukucisha nokushisa kunikeza isivuno esidingekayo/amandla okuqina (isb., S135 Omkhulu noma olingana no-135,000 psi).
• Imijikelezo yesithando somlilo elawulwayo iqinisekisa ngisho nobulukhuni kulo lonke ubude bepayipi.

4. I-Friction Welding

• I-Precision friction{0}}i-welding ihlanganisa amathuluzi ahlangene nomzimba wepayipi ophazamisekile.
• I-Weld zone ithola ukwelashwa okushisayo okukhethekile ukuze kuzuzwe isibopho se-metallurgical esingenamthungo.

5. Machining & Threading

• Imicu ye-API 7-2 (NC, IF, REG, FH) isikwe ngokunemba kwe-CNC.
• I-phosphate coating kanye ne-copper plating isetshenziselwa ukunciphisa ukugaya.

6. I-Hardbanding & Surface Protection

• I-Fe-based, Cr-carbide, noma i-Nb alloy hardbanding inweba ukumelana nokuguga.
• Ukumbozwa kokugcina okunama-rust inhibitors okuvikela ezokuthutha/isitoreji.

• Ukuxhumana Okujwayelekile:I-API NC, IF, FH, REG
• Uxhumo lwe-Premium:I-XT™, HT™, imicu yamahlombe ekabili{{0}ye-torque kanye nokumelana nokukhathala)
• I-Hardbanding:Izendlalelo zokuzivikela ze-Wear-ezisetshenziswa kumajoyini wamathuluzi, kunciphisa imvamisa yokushintshwa kwesitezi.
• Ukwelashwa kwendawo:I-Copper plating, i-phosphating, i-anti{0}}i-galling coatings.

Izixhumanisi zamapayipi okubhoboza i-API 5DP namajoyinti amathuluzinquma ukuthi ingabe iyunithi yezinhlamvu yakho yenza ngokushelelayo yini ku-rig-noma iphenduka isebenze kabusha nesikhathi sokulinda. Iningi "lezinkinga zesayithi" zivela kwesinye sezikhala ezintathu zokuthenga: iukuqokwa kokuxhumana okungalungile, ubukhulu obuhlangene bethuluzi obungahambisani namathuluzi okuphatha, nomaubufakazi obungekho bokulawula intambo.

Okufanele ukubeke ku-PO (ukuze u-Octal akwazi ukukunikeza njengohlelo olufaniswayo):

• Uhlobo lokuxhuma:I-NC / IF / REG / FH (noma izinga lakho eliqondile lemikhumbi)
• Iphini/uhlelo lwebhokisi:qinisekisa ukuma kwephini/ibhokisi nanoma yiziphi izidingo ze-crossover
• Imikhawulo ehlangene yethuluzi:ithuluzi elihlanganyelwe OD + isikhala se-tong / izithiyo zendawo yekheshi
• Izinketho zokugqoka (kuphela uma kudingeka):i-hardband, i-internal coating,-umkhuba wokulwa nenyongo
• Ububanzi bokuvikela:izivikeli zentambo zifakiwe (iphinikhodi nebhokisi)

Indlela i-Octal enciphisa ngayo inkinga (eqondile, hhayi ejwayelekile):

• Siqinisekisa i-uhlelo lokuxhuma kanye nemikhawulo ehlangene yamathuluzi ngaphambi kokukhiqizangakho-ke ipayipi elethiwe lihambisana nokwenza kwakho i-rig, hhayi intambo "ezenzakalelayo".
• Ukuthunyelwa ngakunye kuhlanganisaukulandeleka + amarekhodi anobukhulu, futhiubufakazi be-gaging lapho bucacisiwe-ukuze ukuhlola okungenayo kungaphuma ngaphandle kokujaha i-imeyili.
• Izivikeli zochungechunge nokuhlanganisa okuzinzile kuthathwa njengengxenye yokulawulwa kwezingcuphe zokwamukela, ngoba izinkinga eziningi{0}}zokwakha ziqala ekusingatheni, hhayi i-metallurgy.

ukuthenga{0}okokuqala + kwezilawuli ze-Octal:

Ukulimala kwe-Rig-yaphansi ngokuvamile kuvela emathuluzini okuphatha angafani, ukusethwa kwe-tong okungalungile, noma ukwakheka okungalawuleki{1}}. I-Octal Pipe ihlinzeka ngepayipi lokubhoboza elinezinketho zokuxhuma (i-NC/IF/REG/FH kanye nehlombe eliphindwe kabili-}eliphindwe kabili) kanye nokwelashwa kwendawo (i-phosphating/copper plating) ukuze intambo ihambe ihlanzekile ngezisetshenziswa zokuphatha ezijwayelekile.

Thepha i-Drill Size Reference (ye-Shop Threading, hhayi i-Oilfield Drill Pipe)

Imibuzo elandelayo "yosayizi wokubhoboza ipayipi" ibhekisela kumasayizi okubhoboza kampompi asetshenziselwa ukusika imicu ye-NPT endaweni yokusebenzela; awawona amapayipi okubhoboza i-OD/uxhumano olucacisiwe. Ukuze uthole ireferensi esheshayo: 1/8″ i-NPT tap drill ivamisile11/32″ (0.344″ / 8.73 mm), 1/4″ i-NPT iyi7/16″ (0.438″ / 11.11 mm), kanye ne-3/8″ NPT iyi37/64″ (0.578″ / 14.68 mm)-njalo qinisekisa ngokumelene neshadi lomkhiqizi wokuthepha ukuze uthole uchungechunge olunembile kanye namaphesenti ochungechunge.

Amabanga ahlukene amapayipi okubhoboza aklanyelwe izimo ezithile zemithombo:

• E75:Ikhiqiza Okukhulu noma kulingana no-75,000 psi. Ifanele imithombo engashoni/phakathi{3}}ejulile.
• X95:Ikhiqiza Okukhulu noma kulingana no-95,000 psi. Ibanga-elijwayelekile lenjongo enokuqina okungcono.
• G105:Hola Okukhulu noma kulingana no-105,000 psi. Isetshenziswa emithonjeni ejulile noma emithwalweni ephakeme.
• S135:Hola Okukhulu noma kulingana no-135,000 psi. Iyadingeka emithonjeni ejulile nezimo ze-HPHT.

Amapharamitha Emishini Ebalulekile (nge-API 7-1 / 5DP):

• Amandla Okuqina:Kuqinisekiswe ngokuhlolwa okulimazayo ebangeni ngalinye.
• Ukuqina Komthelela:Ukuhlolwa kwe-Charpy V{0}notch emazingeni okushisa abucayi.
• Ukulawula Ukuqina:Amalunga ethuluzi 285–341 HB ejwayelekile; ubulukhuni bomzimba kulawulwa ngokuqinile.
• Ukusebenza kokukhathala:Indawo yethuluzi yokuhlanganisa/indawo yokushisela ihlolwe ukumelana nokulayisha okujikelezayo.

Ukuthenga akudingi amagama athi "QA aqinile". Uyadingaimibandela yokwamukela izinombolokanye aiphakethe ledokhumentilokho kubonisa imiphumela elinganisiwe. Ku-API 5DP drill pipe (PSL-1 / PSL-2 / PSL-3), i-Octal iqondanisa ububanzi bokuhlolaI-PO/ITP, bese iletha amarekhodi afana namasheke aqhutshwa abahloli bakho.

ZU 10204 3.1/3.2 iphekhi yedokhumenti (uma icacisiwe):I-MTC/CMTR enenombolo yokushisa, ikhemistri, imiphumela yemishini, kanye nemephu yokulandeleka kuhlu lokuthunyelwa.

Izinsiza ze-Octal PipeIpayipi lokubhoboza i-API 5DPngezinhlelo zokubhoboza lapho abathengi abanandaba khona "nokubhoboza ipayipi ngokujwayelekile" nokunye okwengeziweukuhambisana kokuxhumeka, ingozi yokukhathala, kanye namaphepha okwamukelalokho ngeke kubambezele umshini.

Imithombo echezukile futhi eqondisayo (lapho ukukhathala nokuhlangana kwamathuluzi kubonakala kuqala)

I-Doglegs nemijikelezo ephindaphindiwe ijezisa ukuxhumana. Iphutha elivame kakhulu lokuthenga uku-oda ipayipi ngaphandle kokukhiyauhlelo lokuxhuma + imikhawulo ehlangene yethuluzi, bese bethola ukungahambisani phakathi-nokwakheka.

• Indlela ye-Octal Pipe:qinisekisa ukuqokwa okuqondile koxhumo kanye nemikhawulo ehlanganyelwe yamathuluzi ku-PO, bese usekela ukwamukelwa ngobufakazi bokuhlola intambo/ukulinganisa uma kucacisiwe, ukuze "ngeke kwakha" kungabi inkinga-yesikhathi.

Offshore kanye{0}}nezinto eziningi zokubamba (lapho imicu yonakaliswa ngaphambi kokuba noma ubani abone)

Uma ipayipi liphakanyiswa, lifakwa kusiteji, futhi lidluliswa izikhathi eziningi, "kubukeka kukuhle lapho ufika" ngokuvamile kuphenduka umonakalo wephini/ibhokisi ovela kuphela kumshini wokurigisela.

• Indlela ye-Octal Pipe:phatha ukuvikela njengengxenye ye-QA-izivikeli zentambo + ukuhlanganisa okuzinzile + ukumaka okucacile ngosayizi/ibanga/ubude-ukuze igceke lakho lokwamukela lingahlanganisi imininingwane futhi abasebenzi bakho bangaxazululi umonakalo wokuthutha.

Isevisi emuncu / uketshezi lokumba olubolayo (lapho ukugqwala kwangaphakathi kuba yizindleko ezifihliwe)

Emigodini ngeI-H₂S/CO₂, ama-chloride aphezulu, noma uketshezi lokumba olunolaka, ukwehluleka kwamapayipi okubhoboza kuvame ukuqala njengokugqwala kwangaphakathi noma ukubhoboza isikhathi eside ngaphambi kokuba iyunithi yezinhlamvu "ibukeke kabi" ngaphandle-bese ibonakala njengokwenqatshwa ngaphambi kwesikhathi phakathi nokuhlolwa noma isikhathi sokuphumula esingalindelekile.

• Indlela ye-Octal Pipe:sihlola ukuhleleka kwendawo okukuyo (izishayeli zoketshezi/ukugqwala + izinga lokushisa), bese sinikezela ngepayipi lokubhola le-API 5DP ngeukuhlola{0}}iphekhi elungileesekela ukwamukelwa (MTC/CMTR + mechanical results, plusI-NDT nezinketho zokuhlanganisa zangaphakathi uma kucaciswe ku-PO/ITP), ngakho-ke ukuthenga kwesevisi{0}}okubi kakhulu akunciki ekuqageleni.

Okwe-EPC nosonkontileka abambayo beqhathanisaAbakhiqizi bamapayipi okubhola baseChinafuthidrill amapayipi abahlinzeki, isinqumo ngokuvamile sisekelwe ekuhleleni ukulandeleka (ukushisa-kuya-ukuhlanganisa imephu), ukuvikelwa kokuxhumeka ngesikhathi sokuthutha, kanye nokuthi ingabe amarekhodi e-QA angafakwa ngokuqondile ohlelweni lwephrojekthi (uma ecaciswe ku-PO/ITP).

1. Ikhwalithi yokushisela ehlangene yethuluzi (i-hotspot yesakhiwo sangempela)

2. Ipayipi lokubhoboza alivamile ukuhluleka phakathi nomzimba kuqala-izinkinga ngokuvamile zigxila eduzeindawo yokuhlanganisa ithuluzi/weldngoba ithwala{0}}ama-make up cycles, torque, kanye nokugoba. I-Octal Pipe ilawula lokhu ngokuphatha ithuluzi njengenqubo-isinyathelo esibalulekile, hhayi isengezo sempahla{3}}, futhi amarekhodi okuthunyelwa ahlanganisa umsebenzi ohlanganyelwe wethuluzi ukuze ukwamukela kunganciki kokuthi "kubukeka KULUNGILE."

3. Ukwelashwa kokushisa nokuvumelana kwebanga (kungani i-"API 5DP" isadinga ubufakazi)

4. Ukuthenga ipayipi le-API 5DP drill akukhona nje ukuthenga ilebula{1}}kuyathengaukusebenza okuphindaphindiwe komshinibatch ukuze batch. I-Octal Pipe igcina ukunikezwa kwebanga kuhambisana ngokucutshungulwa okulawulwayo futhi inikezela ngemiphumela yemishini ephaketheni ledokhumenti ukuze ukuthengwa kwempahla kugunyazwe ngobufakazi, hhayi izithembiso zomphakeli.

5. Isiyalo somshini womshini nokukala ({0}}ukwenza ukwethembeka kuyakhiqizwa)

6. Ukubambezeleka okuningi kwe-rig kuvela emiculweni: i-galling, ukulingana kahle, noma ukulimala obekungavinjelwa. I-Octal Pipe iphatha ukulawula kwentambo njengekhwalithi yokukhiqiza{1}}imicu evikelekile ekuphathweni futhi, uma i-PO/ITP yakho ikucela, ukulethwa kuhlanganisaintambo gauging ubufakazingakho ithimba elamukelayo lingasayina ngaphandle kwengxabano.

7. Ukupakisha njengengxenye yekhwalithi yenqubo (ngoba ukuthutha kungonakalisa ipayipi elihle)

8. Ngisho nepayipi elenziwe ngokuphelele "lingenziwa libe libi" ku-logistics. Kungakho i-Octal Pipe iphatha abavikeli, ukuzinza kwenqwaba, nokumaka ngosayizi/ibanga/ubude njengengxenye yokulawula inqubo{1}}ngakho lokho okutholayo sekulungele ukusebenza, hhayi "okudinga ukuhlungwa nokubhekwa kabusha."

Uma uthola ipayipi lokubhoboza elizothengiswa ngohlelo olusebenzayo, indlela eshesha kakhulu yokugwema ukwenqatshwa kokuthi "ngeke kwenze" ukucaphuna njengesistimu efanisiwe, hhayi ishubhu ejwayelekile. State OD/WT and Range (R1/R2/R3), grade (E75/X95/G105/S135), kanye negama eliqondile lokuxhuma (NC/IF/REG/FH noma i-premium double-ihlombe), bese wengeza izithiyo ezihlangene zamathuluzi (isikhala se-OD/tong) kanye nezimfuneko zomvikeli zokuphatha nokubalwa kwegceke. Uma i-PO/ITP yakho idinga ubufakazi, biza amarekhodi ngaphambili{10}imiphumela ye-drift (usayizi we-mandrel + pass/fail), i- thread gauging, kanye nobubanzi be-NDT kuphela lapho kucacisiwe{12}}ukuze ukuthunyelwa kufike "ukuvunyelwa{13}}kulungile" esikhundleni sokucupha imijikelezo yokuhlola eyengeziwe.

Xhumana manje

Leli khasi lihlanganisaoilfield API 5DP drill pipengezintambo zokubhoboza. Amashadi kasayizi wokubhoboza ochungechunge lwe-NPT ayisihloko somshini esihlukile futhi awayona ingxenye yokuthengwa kwepayipi lokubhoboza.

FAQ

 

Uyini umehluko phakathi kwe-API 5DP ne-API RP 7G yokuthenga ipayipi lokubhoboza?

I-API 5DPyiizinga lokuthenga nokwamukelaukukhiqiza/ububanzi bokuhlola amapayipi okubhola.I-API RP 7Gisetshenziswa kakhulu njenge-aireferensi yokukhetha(ikuphi okokufaka okufanele kucatshangelwe kumalungu e-drill stem kanye nemikhawulo yokusebenza). Kuma-RFQs, sebenzisa i-5DP ukuze ukhiye ukwamukela nokusebenzisa ukucabanga kwe-7G ukuze ugweme ukuthenga kokuxhumana okungalungile{3}}kwebanga/okungalungile{4}}.

Yini okufanele ngiyicacise lapho ngithenga ipayipi lokubhoboza i-API 5DP ukuze ngigweme ukubambezeleka kokwenza-okuseceleni?

CacisaI-OD/WT + Ububanzi (R1/R2/R3), ibanga, kanye nempelaukuqokwa kokuxhumana(NC/IF/REG/FH) kanyeimikhawulo ehlangene yethuluzi(Isikhala se-OD/tong). Engezaintambo abavikelifuthi usho ngokucacile noma yimuphi umkhawulo wokuhlola odingekayo (isb., i- thread gauging/NDT) ku-PO ngakho-ke akukho lutho "olucatshangwayo."

Yimiphi imibhalo okufanele ize nepayipi lokubhoboza le-API 5DP ukuze lihlolwe okungenayo?

Okungenani:I-MTC/CMTR (ukulandeleka), amarekhodi anobukhulu/obuqondile, kanye nohlu lokupakisha olufakwe kumephuusayizi/ibanga/ubude. Uma i-PO/ITP yakho iyidinga, engezaintambo gauging ubufakazi, plusImibiko ye-NDT/hydrotest/impactkuphela uma kucacisiwe-ngakho ukwamukela kuwubufakazi-kusekelwe, akusekelwe ku-imeyili-.

Ngikukhetha kanjani okuxhunywayo namajoyinti wamathuluzi wezinhlelo ezichezukile noma eziphezulu{0}}ze-torque?

Emsebenzini ochezukile/ophezulu{0}}we-torque, ukwehluleka nokubambezeleka kuvame ukuqala e-uxhumano/ithuluzi elihlangeneindawo, hhayi umzimba wepayipi. Khetha ukuxhumana ukuze ufane nezinga lakho le-rig/fleet, bese uvala ithuluzi lokuhlanganisa imikhawulo kanye nezidingo zokuphatha (abavikeli/ukupakisha) ukuze unciphise ukulimala kwentambo futhi wenze{1}}ukwenqatshwa; cela amarekhodi okuhlola engeziwe lapho umlando wakho wokungaphumeleli ukuthethelela.

Izitifiketi

 

Isitifiketi se-CE

Isitifiketi se-ISO 9001

Isitifiketi se-API Q1

Isitifiketi se-ABS

Isitifiketi se-AP-5L

Isitifiketi se-API-5CT

 

I-OD Range: 2 3/8" – 6 5/8"

Amabanga: E75, X95, G105, S135

Ubude: R1 / R2 / R3

Izinhlobo ezicasulayo:IU, EU, EU

Izixhumanisi:NC, IF, REG, FH, izinketho zeprimiyamu

Izicelo:Imithombo ejulile, i-HPHT, i-offshore, ukumba okuqondisayo

Amashadi ashisayo: ipayipi lokubhoboza, China abakhiqizi bepayipi lokubhoboza, abahlinzeki, imboni