Mapaipi eOCTGAnonyanya kushandiswa pakuchera matsime emafuta negasi uye kutakura mafuta negasi. Anosanganisira mapaipi ekuchera mafuta, mabhokisi emafuta, uye mapaipi ekuburitsa mafuta.Mapaipi eOCTGAnonyanya kushandiswa kubatanidza makola ekuboorera nemabhiti ekuboorera uye kutumira simba rekuboorera.Chivharo chemafuta chinoshandiswa zvakanyanya kutsigira tsime panguva yekuchera uye mushure mekupedza, kuve nechokwadi chekuti tsime rese remafuta rinoshanda zvakanaka panguva yekuchera uye mushure mekupedza. Mafuta negasi riri pasi petsime remafuta zvinonyanya kutakurwa kuenda pamusoro nechubhu inopomba mafuta.
Kuisa mafuta mubhokisi ndiyo nzira yekuchengetedza mashandiro ematsime emafuta. Nekuda kwemamiriro akasiyana enzvimbo, mamiriro ekumanikidzwa ari pasi pevhu akaoma, uye mhedzisiro yekumanikidzwa, kudzvanywa, kukotama, uye kumanikidzwa kwemutumbi webhokisi zvinopa zvinodiwa zvakanyanya kuti bhokisi racho rive rakanaka. Kana bhokisi racho rikakuvara nekuda kwechimwe chikonzero, zvinogona kukonzera kudzikira kwekugadzirwa kana kutobviswa kwetsime rese.
Zvichienderana nesimba resimbi pachayo, keji inogona kukamurwa kuita mhando dzakasiyana dzesimbi, dzinoti J55, K55, N80, L80, C90, T95, P110, Q125, V150, nezvimwewo. Mhando yesimbi inoshandiswa inosiyana zvichienderana nemamiriro etsime uye kudzika kwaro. Munzvimbo dzine ngura, zvinodiwawo kuti keji yacho ive inodzivirira ngura. Munzvimbo dzine mamiriro akaomarara enzvimbo, zvinodiwawo kuti keji yacho ive inodzivirira ngura.
I. ruzivo rwekutanga OCTG Pipe
1. Tsanangudzo yemashoko akakosha ane chekuita nepaipi yepeturu
API: ipfupiso yeAmerican Petroleum Institute.
OCTG: Ipfupiso yeOil Country Tubular Goods, zvinoreva machubhu akagadzirwa nemafuta, kusanganisira casing yemafuta apera, pipe yekuboorera, ma drill collars, hoops, ma short joints nezvimwewo.
Machubhu eOiri: Machubhu anoshandiswa mumatsime emafuta ekuburitsa mafuta, kubvisa gasi, kupinza mvura uye kupwanya acid.
Chivharo: Kuisa machubhu anodzikiswa kubva pamusoro penyika kuenda mugomba rakaboorwa semuchina wekudzivirira kuputsika kwemadziro etsime.
Pombi yekuboorera: Pombi inoshandiswa pakuboorera mabhora.
Pipe yemutsetse: Pipe inoshandiswa kutakura mafuta kana gasi.
Madenderedzwa: Masirinda anoshandiswa kubatanidza mapaipi maviri ane shinda neshinda dzemukati.
Zvinhu zvinobatanidza: Pombi dzinoshandiswa kugadzira zvinobatanidza.
Mashinda eAPI: Mashinda epombi anotsanangurwa neAPI 5B standard, anosanganisira mashinda akatenderera epombi yeoiri, mashinda mapfupi akatenderera, mashinda marefu akatenderera, mashinda etrapezoidal akagadziriswa, mashinda epombi ane mutsara nezvimwewo.
Chisungo Chakakosha: Mashinda asiri eAPI ane hunhu hwakakosha hwekuvharira, hunhu hwekubatanidza nezvimwe hunhu.
Kukundikana: kuchinja, kutyoka, kukuvara pamusoro uye kurasikirwa nebasa rekutanga pasi pemamiriro chaiwo ebasa. Mhando huru dzekutadza kushanda kwechikamu chemafuta ndeidzi: kubuda, kutsvedza, kuputika, kubuda kwemvura, ngura, kubatana, kupfeka nezvimwewo.
2, mitemo ine chekuita nepetroleum
API 5CT: Tsananguro yeCasing neTubing (parizvino ndiyo yazvino vhezheni yechisere)
API 5D: Tsanangudzo yepombi yekuboorera (vhezheni yazvino yechinyorwa chechishanu)
API 5L: tsanangudzo yepombi yesimbi yepombi (vhezheni yazvino yechinyorwa chechi44)
API 5B: Tsanangudzo yekugadzira, kuyera uye kuongorora casing, mafuta epombi uye line pipe threads
GB/T 9711.1-1997: Mamiriro ehunyanzvi ekutumira mapaipi esimbi ekufambisa indasitiri yemafuta negesi Chikamu 1: Mapaipi esimbi eGiredhi A
GB/T9711.2-1999: Mamiriro ehunyanzvi ekutumira mapaipi esimbi ekufambisa indasitiri yemafuta negesi Chikamu 2: Mapaipi esimbi eGiredhi B
GB/T9711.3-2005: Mamiriro Ehunyanzvi Ekutumira Mapaipi Esimbi Ekufambisa Indasitiri yePetroleum neGasi Rezvisikwa Chikamu 3: Giredhi C Mapaipi Esimbi
Ⅱ. Pombi yemafuta
1. Kupatsanurwa kwemapombi emafuta
Mapaipi emafuta akakamurwa kuita machubhu eNon-Upset (NU), machubhu eExternal Upset (EU), uye machubhu ejoini akabatanidzwa. Machubhu eNon-Upset zvinoreva mugumo wepaipi une shinda isina kukora uye wakashongedzwa ne coupling. Machubhu eExternal Upset zvinoreva magumo maviri epaipi akakora kunze, obva aiswa shinda uye akaiswa ma clamps. Machubhu ejoini akabatanidzwa zvakananga zvinoreva paipi yakabatana zvakananga isina coupling, ine mugumo mumwe wakakotama kuburikidza neshinda yekunze yakakora mukati uye mumwe mugumo wakakotama kuburikidza neshinda yemukati yakakora kunze.
2. Basa remachubhu
1, kuburitswa kwemafuta negasi: mushure mekunge matsime emafuta negasi acherwa uye aiswa simende, chubhu inoiswa mubhokisi remafuta kuti ibudise mafuta negasi pasi.
2, jekiseni remvura: kana kumanikidzwa kwegomba risina kukwana, isa mvura mugomba nepachubhu.
③, Kupinza mafuta mumhepo: Munguva yekudzoreredza mafuta mumhepo, mhepo inofanira kuiswa mutsime nemapaipi emafuta anodzivirirwa.
(iv) Kuisa asidhi nekupwanya: Padanho rekupedzisira rekuchera matsime kana kuti kuitira kuvandudza kugadzirwa kwematsime emafuta negasi, zvakakosha kuisa zvinhu zvinoisa asidhi nekupwanya mumafuta negasi, uye zvinhu zvinoisa asidhi nekupwanya zvinotakurwa nemupombi yemafuta.
3.Simbi yemhando yepombi yemafuta
Mhando dzesimbi dzemapaipi emafuta ndeidzi: H40, J55, N80, L80, C90, T95, P110.
N80 yakakamurwa kuita N80-1 neN80Q, mbiri idzi dzine hunhu hwakafanana hwekudhonza, misiyano miviri iyi imamiriro ekutumira uye misiyano yekushanda kwemhedzisiro, kutumirwa kweN80-1 nemamiriro akajairwa kana kana tembiricha yekupedzisira yekutenderera yakakura kupfuura tembiricha yakakosha yeAr3 uye kuderedzwa kwekumanikidzwa mushure mekutonhorera kwemhepo, uye inogona kushandiswa kutsvaga dzimwe nzira dzekugadzirisa hot-rolled, kuyedza kwemhedzisiro uye kusaparadza hakudiwi; N80Q inofanira kudziya (kudzima uye kudziya). Kurapa kupisa, basa remhedzisiro rinofanira kuenderana nezvinodiwa neAPI 5CT, uye rinofanira kunge riri kuyedza kusingaparadze.
L80 yakakamurwa kuita L80-1, L80-9Cr uye L80-13Cr. Hunhu hwavo hwemakanika uye mamiriro ekutumira akafanana. Musiyano mukushandiswa, kuoma kwekugadzira uye mutengo, L80-1 yemhando yakajairika, L80-9Cr uye L80-13Cr machubhu anodzivirira ngura zvakanyanya, kuoma kwekugadzira, anodhura, anowanzo shandiswa kumatsime engura akakura.
C90 neT95 zvakakamurwa kuita mhando 1 nerudzi rwechipiri, kureva, C90-1, C90-2 neT95-1, T95-2.
4. Kazhinji inoshandiswa simbi giredhi, giredhi uye mamiriro ekutumira kwepombi yemafuta
Chimiro chekuendesa chegiredhi resimbi
Pombi yemafuta yeJ55 37Mn5 pombi yemafuta yakatsetseka: inopisa yakamoneredzwa panzvimbo peyakajairwa
Pombi yemafuta yakakora: yakareba zvakakwana mushure mekukora.
N80-1 chubhu 36Mn2V 36Mn2V Tafura yemhando yepamusoro: yakaputirwa nemoto panzvimbo peyakajairwa
Pombi yemafuta yakakora: yakareba-yakajairika mushure mekukora
Pombi yemafuta yeN80-Q 30Mn5 yakazara-refu yekudziya
Pombi yemafuta yeL80-1 30Mn5 yakazara-refu yekupisa
Pombi yemafuta yeP110 25CrMnMo yakazara-refu yekudziya
J55 coupling 37Mn5 inopisa yakakungurutswa pa-line normalization
N80 coupling 28MnTiB yakazara-refu tempering
Kubatanidza kweL80-1 28MnTiB tempering yakazara
Makiramu eP110 25CrMnMo Akareba Zvakakwana
Ⅲ. Kesi
1. Kuisa mumapoka uye basa rekuisa chifukidziro
Casing ipombi yesimbi inotsigira madziro ematsime emafuta negasi. Zvikamu zvakasiyana-siyana zvecasing zvinoshandiswa mutsime rega rega zvichienderana nekudzika kwakasiyana kwekuchera uye mamiriro enzvimbo. Simende inoshandiswa kusimbisa casing mushure mekunge yadzikiswa mutsime, uye kusiyana nemapombi emafuta nepombi yekuboorera, haigone kushandiswazve uye ndeyezvinhu zvinoraswa. Nokudaro, kushandiswa kwecasing kunodarika 70% yemataipi ese emafuta. Casing inogona kuiswa muzvikamu zvinotevera: conduit, surface casing, technical casing uye oil casing zvichienderana nekushandiswa kwayo, uye maumbirwo avo mumatsime emafuta anoratidzwa mumufananidzo uri pazasi.
2. Kavha yemutyairi
Zvinonyanya kushandiswa pakuchera mugungwa nemurenje kuti mvura yegungwa nejecha zviparadzaniswe kuitira kuti kuchera kuenderere mberi zvakanaka, zvinhu zvikuru zvinodiwa pakuchera uku ndeizvi: Φ762mm(30in )×25.4mm, Φ762mm(30in)×19.06mm.
Kaburi repamusoro: Rinonyanya kushandiswa pakuboorera kwekutanga, kubhoorera kunovhura pamusoro pekaburi repamusoro kusvika padombo guru, kuti chikamu ichi chekaburi chisaputsika, chinofanira kuvharwa nekaburi repamusoro. Zvinonyanya kukosha zvekaburi repamusoro: 508mm (20in), 406.4mm (16in), 339.73mm (13-3/8in), 273.05mm (10-3/4in), 244.48mm (9-5/9in), nezvimwewo. Kudzika kwepombi yekudzikisa kunoenderana nekudzika kwechimiro chakapfava. Kudzika kwepombi yepasi kunoenderana nekudzika kwekaburi repamusoro, iro rinowanzova 80~1500 m. Kumanikidzwa kwayo kwekunze nekwemukati hakusi kukuru, uye inowanzo tora giredhi resimbi reK55 kana giredhi resimbi reN80.
3. Chivharo chehunyanzvi
Kuboorwa kwehunyanzvi kunoshandiswa mukuita kwekugadzira mafomu akaomarara. Kana ukasangana nezvikamu zvakaomarara zvakaita sechikamu chakakoromoka, chikamu chemafuta, chikamu chegasi, chikamu chemvura, chikamu chekubuda kwemvura, chikamu chemunyu, nezvimwewo, zvakakosha kuisa pasi chikamu chehunyanzvi kuti chivharwe, zvikasadaro kuchera hakugone kuitwa. Mamwe matsime akadzika uye akaomarara, uye kudzika kwetsime kunosvika zviuru zvemamita, rudzi urwu rwematsime akadzika runofanira kuisa pasi zvikamu zvakati wandei zvechikamu chehunyanzvi, hunhu hwaro hwemakanika uye zvinodiwa pakushanda kwesealing zvakakwirira kwazvo, kushandiswa kwemagiredhi esimbi kwakakwirawo, kuwedzera kuK55, kushandiswa kwemagiredhi eN80 neP110 kwakawanda, mamwe matsime akadzika anoshandiswawo muQ125 kana kunyange magiredhi epamusoro asiri eAPI, akadai seV150. zvirevo zvikuru zvekesi rehunyanzvi ndeizvi: 339.73 Zvinonyanya kukosha zvekesi rehunyanzvi ndeizvi: 339.73mm(13-3/8in), 273.05mm(10-3/4in), 244.48mm(9-5/8in), 219.08mm(8-5/8in), 193.68mm(7-5/8in), 177.8mm(7in) zvichingodaro.
4. Chivharo chemafuta
Kana tsime rakacherwa kusvika parinoda kucherwa (chikamu chine mafuta negasi), zvinodikanwa kushandisa chivharo chemafuta kuvhara chikamu chemafuta negasi pamwe nechikamu chepamusoro chakavhurika, uye mukati mechikamu chemafuta ndipo pane chikamu chemafuta. Chivharo chemafuta mumhando dzese dzechivharo mugomba rakadzika, hunhu hwaro hwemakanika uye zvinodiwa pakushanda kwesefa ndizvo zvepamusoro, kushandiswa kwesimbi yemhando K55, N80, P110, Q125, V150 nezvimwewo. Zvinonyanya kukosha zvechivharo chekugadzira ndeizvi: 177.8mm(7in), 168.28mm(6-5/8in), 139.7mm(5-1/2in), 127mm(5in), 114.3mm(4-1/2in), nezvimwewo. Chivharo ndicho chakadzika kupfuura mamwe marudzi ese ematsime, uye mashandiro aro emakanika uye mashandiro esefa ndizvo zvepamusoro.
Pombi yeV.Drill
1, Kupatsanura uye basa repombi yezvombo zvekuboora
Pombi yekuboorera ine sikweya, pombi yekuboorera, pombi yekuboorera ine weighted drill uye drill collar muzvishandiso zvekuboorera zvinoumba pombi yekuboorera. Pombi yekuboorera ndiyo chinhu chikuru chinodhonza drill bit kubva pasi kuenda pasi petsime, uye zvakare inzira kubva pasi kuenda pasi petsime. Ine mabasa matatu makuru: ① kuendesa torque kuti iendese drill bit kuti iboorere; ② ichivimba nehuremu hwayo kuti ishandise simba padrill bit kuti iputse dombo riri pasi petsime; ③ kutakura mvura yekuwachisa tsime, kureva kuti, matope ekuboorera nepasi kuburikidza nemapombi ematope ane simba rakawanda, kupinda mugomba rekoramu yekuboorera kuti ienderere pasi petsime kuti ibvise marara edombo uye itonhodze drill bit, uye kutakura marara edombo nepakati penzvimbo iri pakati pekunze kwekoramu nemadziro etsime kuti adzokere pasi, kuitira kuti chinangwa chekuboorera tsime chibudirire. Pombi yekuboorera panguva yekuboorera inogona kutsungirira mitoro yakasiyana-siyana yakaoma, yakadai sekumanikidzwa, kumanikidzwa, kutenderera, kukotama nezvimwe zvinonetsa, uye pamusoro wemukati unowanikwawo nekukweshwa kwevhu uye ngura.
(1) pombi yekuboorera yemativi mana: pombi yekuboorera yemativi mana ine mhando mbiri dzemhando yemativi mana nedzemhando yemativi matanhatu, tsvimbo yekuboorera yemafuta yeChina seti yega yega yekoramu yekuboorera inowanzo shandisa pombi yekuboorera yemarudzi mana. Zvirevo zvayo ndeizvi: 63.5mm (2-1/2in), 88.9mm (3-1/2in), 107.95mm (4-1/4in), 133.35mm (5-1/4in), 152.4mm (6in) zvichingodaro. Kazhinji kureba kunoshandiswa i12~14.5m.
(2) Pombi yekuboorera: Pombi yekuboorera ndiyo chishandiso chikuru chekuchera matsime, chakabatana nemucheto wepasi wepombi yekuboorera, uye sezvo tsime rekuboorera richiramba richidzika, pombi yekuboorera inoramba ichirebesa koramu yekuboorera imwe mushure meimwe. Zvinodiwa zvepombi yekuboorera ndeizvi: 60.3mm (2-3/8in), 73.03mm (2-7/8in), 88.9mm (3-1/2in), 114.3mm (4-1/2in), 127mm (5in), 139.7mm (5-1/2in) nezvimwewo.
(3) Weighted Drill Pipe: Weighted drill pipe chishandiso chinoshandura chinobatanidza drill pipe ne drill collar, izvo zvinogona kuvandudza simba re drill pipe pamwe nekuwedzera kumanikidzwa pa drill bit. Zvinonyanya kukosha zve weighted drill pipe ndezve 88.9mm (3-1/2in) uye 127mm (5in).
(4) Kola yekuboorera: kola yekuboorera yakabatana nechikamu chezasi chepombi yekuboorera, inova pombi ine madziro akakora uye yakasimba, ichimanikidza gomba rekuboorera kuti riputse dombo, uye inogona kuita basa rekutungamira pakuboorera matsime akatwasuka. Zvinonyanya kutaurwa nezvekola yekuboorera ndeizvi: 158.75mm (6-1/4in), 177.85mm (7in), 203.2mm (8in), 228.6mm (9in) zvichingodaro.
V. Pombi yemutsetse
1, Kupatsanura mutsetse wepombi
Pombi yemutsetse inoshandiswa muindasitiri yemafuta negesi kutakura mafuta, mafuta akacheneswa, gasi rechisikigo uye mapaipi emvura nepaipi yesimbi muchidimbu. Kutakurwa kwemapaipi emafuta negasi kwakakamurwa kuva mapaipi makuru, mapaipi ebazi uye mapaipi eguta ane network yemapaipi, mutsetse mukuru wekutumira mapaipi une specifications dzakajairika dze∮ 406 ~ 1219mm, ukobvu hwemadziro hwe10 ~ 25mm, giredhi resimbi X42 ~ X80; mapaipi ebazi uye mapaipi eguta ane network yemapaipi ane specifications dzakajairika dze# 114 ~ 700mm, ukobvu hwemadziro hwe6 ~ 20mm, giredhi resimbi X42 ~ X80. Specifications dzakajairika dzemapaipi ekudyara nemapaipi eguta ndedze114-700mm, ukobvu hwemadziro 6-20mm, giredhi resimbi X42-X80.
Pipe yemutsetse ine pombi yesimbi yakasungirirwa, inewo pombi yesimbi isina musono, pombi yesimbi yakasungirirwa inoshandiswa kupfuura pombi yesimbi isina musono.
2, Line mutopota mureza
Mwero wepombi yemutsetse iAPI 5L "tsanangudzo yepombi yesimbi yepombi", asi China muna 1997 yakaburitsa zviyero zviviri zvenyika zvepombi yepombi: GB/T9711.1-1997 "indasitiri yemafuta negesi, chikamu chekutanga chemamiriro ehunyanzvi ekutumira pombi yesimbi: pombi yesimbi yeA-grade" uye GB/T9711.2-1997 "indasitiri yemafuta negesi, chikamu chechipiri chemamiriro ehunyanzvi ekutumira pombi yesimbi: pombi yesimbi yeB-grade". Pipe yeSimbi", zviyero izvi zviviri zvakaenzana neAPI 5L, vashandisi vazhinji vemumba vanoda kuwanikwa kwematanho maviri aya enyika.
3. NezvePSL1 nePSL2
PSL ipfupiso yezinga rekugadzirwa kwezvigadzirwa. Nhamba yemhando yezvigadzirwa zvepombi yemutsetse yakakamurwa kuita PSL1 nePSL2, zvinogonawo kutaurwa kuti huwandu hwemhando hwakakamurwa kuita PSL1 nePSL2. PSL1 yakakwira kupfuura PSL2, huwandu hwemhando mbiri hahusi chete hunodiwa hwakasiyana hwekuyedza, uye huwandu hwemakemikari, zvinodiwa zvehunhu hwemakanika zvakasiyana, saka zvichienderana neAPI 5L, mazwi echibvumirano pamwe chete nekutarisa marongero, giredhi resimbi nezvimwe zviratidzo zvakajairika, asi inofanirawo kuratidza huwandu hwemhando yezvigadzirwa, kureva PSL1 kana PSL2.
PSL2 mukugadzirwa kwemakemikari, hunhu hwekudhonza, simba rekukanganisa, kuyedza kusingaparadze nezvimwe zviratidzo zvakaoma kupfuura PSL1.
4, giredhi resimbi yemapaipi emapaipi uye makemikari
Rudzi rwesimbi yepombi yemutsetse kubva pakaderera kusvika pakakwirira rwakakamurwa kuita: A25, A, B, X42, X46, X52, X60, X65, X70 uye X80.
5, kumanikidzwa kwemvura yepombi yemutsara uye zvinodiwa zvisingaparadzi
Pombi yemugero inofanira kuitwa nebazi rimwe nerimwe re hydraulic test, uye standard haibvumiri kugadzirwa kwe hydraulic pressure isingaparadze, izvo zvakare musiyano mukuru pakati pe API standard ne standards dzedu.
PSL1 haidi bvunzo dzisingaparadze, PSL2 inofanira kunge iri bvunzo dzisingaparadze bazi nebazi.
VI.Kubatanidza Kwepamusoro
1. Nhanganyaya yePremium Connection
Buckle yakakosha yakasiyana netambo yeAPI ine chimiro chakasarudzika chetambo yepombi. Kunyangwe chivharo chemafuta cheAPI chiripo chinoshandiswa zvakanyanya mukushandiswa kwetsime remafuta, zvikanganiso zvaro zvinoratidzwa zvakajeka munzvimbo yakakosha yemimwe minda yemafuta: koramu yepombi yakatenderera yeAPI, kunyangwe mashandiro ayo ekuvhara ari nani, simba rekudhonza rinotakurwa nechikamu chakadhonzwa rakaenzana ne60% kusvika 80% yesimba remuviri wepombi, saka harigone kushandiswa mukushandiswa kwetsime rakadzika; koramu yepombi yakatenderera yeAPI ine tambo yetrapezoidal, mashandiro echikamu chakadhonzwa akaenzana chete nesimba remuviri wepombi, saka harigone kushandiswa mutsime rakadzika; koramu yepombi yakatenderera yetrapezoidal ine tambo yeAPI, mashandiro ayo ekuvhara haana kunaka. Kunyangwe mashandiro ekuvhara ekoramu akakwira zvakanyanya kupfuura ekubatanidza kwetambo yeAPI yakatenderera, mashandiro ayo ekuvhara haana kunaka zvakanyanya, saka haagone kushandiswa mukushandiswa kwetsime regesi rine simba rakawanda; Pamusoro pezvo, girisi rine shinda rinogona chete kuita basa raro munharaunda ine tembiricha iri pasi pe95℃, saka harigone kushandiswa mukushandisa matsime anodziya zvakanyanya.
Kana tichienzanisa ne API round thread uye partial trapezoidal thread connection, Premium Connection yafambira mberi zvakanyanya mune zvinotevera:
(1) chisimbiso chakanaka, kuburikidza nekugadzirwa kwechisimbiso chesimbi uye che elastic, kuitira kuti gasi rekubatana rikwanise kusvika pamuganhu wechubhu mukati mekumanikidzwa kwemugoho;
(2) simba guru rekubatana, nekubatana kwePremium Connection kwebhokisi remafuta, simba rekubatana rinosvika kana kupfuura simba remuviri wechubhu, kugadzirisa dambudziko rekutsvedza zvakanyanya;
(3) nekusarudza zvinhu uye kuvandudza maitiro ekurapa pamusoro, zvakagadzirisa dambudziko rekunamatira kweshinda;
(4) kuburikidza nekugadzirisa chimiro, kuitira kuti kugoverwa kwekumanikidzwa kwemajoini kuve kwakaringana, kunobatsira zvikuru kudzivirira ngura yekumanikidzwa;
(5) kuburikidza nechimiro chepafudzi chedhizaini yakakodzera, kuitira kuti kushanda kwebhandi kuve nyore kuita.
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Nguva yekutumira: Kukadzi-21-2024