Kodi OCTG ndi chiyani?
Zimaphatikizapo Drill Pipe, Steel Casing Pipe ndi Tubing
OCTG ndiye chidule cha Oil Country Tubular Goods, makamaka chimatanthawuza zinthu zamapaipi zomwe zimagwiritsidwa ntchito popanga mafuta ndi gasi (zobowola). Machubu a OCTG nthawi zambiri amapangidwa kutengera zomwe API imafunikira kapena zofananira nazo. Itha kuwonedwanso ngati dzina lachidule la mapaipi obowola, mapaipi azitsulo, zolumikizira, zolumikizira ndi zina zomwe zimagwiritsidwa ntchito m'makampani akunyanja ndi mafuta ndi gasi. Kulamulira katundu mankhwala ndi ntchito zosiyanasiyana kutentha mankhwala, OCTG mapaipi m'gulu zipangizo ntchito zosiyanasiyana ndi makalasi oposa khumi.

Mitundu ya Mafuta a Dziko la Mafuta a Tubular Goods (mapaipi a OCTG)
Pali mitundu itatu ikuluikulu ya Mafuta a Country Tubular Goods, omwe akuphatikiza chitoliro cha Drill, Casing pipe, ndi Tubing pipe.

Chitoliro cha OCTG Drill - Chitoliro Chobowola
Chitoliro chobowola ndi chubu cholemera, chopanda msoko chomwe chimazungulira pobowola ndikuzungulira madzi akubowola. Imalola kuti madzi akubowola apopedwe kudzera pang'onopang'ono ndikubwezeretsa annulus. Chitolirocho chimatha kupirira kupsinjika kwa axial, torque yayikulu kwambiri komanso kuthamanga kwamkati. Ichi ndichifukwa chake chitolirocho ndi champhamvu kwambiri komanso chofunikira pakuchita OCTG.
Drill Pipe nthawi zambiri amatanthauza chitoliro chachitsulo chokhazikika chomwe chimagwiritsidwa ntchito pobowola, miyezo mu API 5DP ndi API SPEC 7-1.
Ngati simukumvetsetsa bwino momwe mafuta amakhalira, ndi danga lomwe lili pakati pa choyikapo ndi mapaipi kapena mipopi iliyonse, poyikapo kapena mipope yozungulira pomwepo. Annulus amalola kuti madzi aziyenda m'chitsime. Kotero pamene tikukamba za chitoliro champhamvu kapena cholemetsa cha OCTG, tikukamba za Drill pipe.
Chitoliro Chosungira Chitsulo - Khazikitsani chitsime
Mapaipi azitsulo amagwiritsidwa ntchito kulumikiza chitsime chomwe chikukumbidwa pansi kuti apeze mafuta. Mofanana ndi chitoliro chobowola, chitoliro chachitsulo chimatha kupirira kupsinjika kwa axial. Ichi ndi chitoliro cham'mimba mwake chachikulu chomwe amachilowetsa m'chibowo chobowola ndikugwiridwa ndi simenti. Chophimbacho chimakhala ndi mphamvu ya axial ya kulemera kwake kwakufa, kuthamanga kwa kunja kwa thanthwe lozungulira, ndi kupanikizika kwa mkati mwa madzi oyeretsa. Ikayikidwa bwino, kubowola kumathandizidwa m'njira izi:
· Choyikapo chimamatira chingwe chobowola ndikuteteza kumtunda kosakhazikika kuti zisagwe.
• Imalepheretsa kuipitsidwa kwa zitsime zamadzi.
· Iwo amalola yosalala mkati anaboola kwa kupanga zida unsembe.
· Imapewa kuipitsidwa kwa malo opangirako komanso kutaya kwamadzimadzi.
· Imalekanitsa malo othamanga kwambiri kuchokera pamwamba
· Ndipo zambiri

Chophimbacho ndi chitoliro cholemera kwambiri chofunikira kwambiri ku OCTG.
OCTG Casing Pipe muyezo
Zitsulo Casing chitoliro mfundo zambiri amatchedwa API 5CT, Common Maphunziro mu J55/K55, N80, L80, C90, T95, P110 etc. Common kutalika mu R3 amene mwadzina pa 40 Ft / 12 mamita. Mitundu yolumikizira mapaipi a Casing nthawi zambiri imakhala mu BTC ndi LTC, STC. Ndipo maulumikizidwe apamwamba amafunikiranso mochulukira mu ntchito yapaipi yamafuta ndi gasi.
Mtengo wa Chitoliro cha Steel Casing
Mtengo wa chitoliro chachitsulo ndi wotsika kuposa chitoliro chobowola kapena mtengo wa chitoliro cha OCTG, chomwe nthawi zambiri chimakhala 200 USD kuposa chitoliro chokhazikika cha API 5L. Ganizirani mtengo wa ulusi + mfundo kapena chithandizo cha kutentha.
OCTG Pipe - Kunyamula mafuta ndi gasi kupita pamwamba
OCTG Pipe imalowa mkati mwa casing chifukwa ichi ndi chitoliro chomwe mafuta amatulukamo. Tubing ndiye gawo losavuta kwambiri la OCTG ndipo nthawi zambiri limabwera m'magawo a 30 ft (9 m), okhala ndi ulusi wolumikizira mbali zonse ziwiri. Mapaipiwa amagwiritsidwa ntchito kunyamula gasi kapena mafuta osapsa kuchokera kumalo opangirako kupita kumalo komwe amakakonzedwa akamaliza kubowola.
Chubucho chiyenera kukhala chokhoza kupirira zovuta panthawi yochotsa ndi kupirira katundu ndi zowonongeka zomwe zimagwirizanitsidwa ndi kupanga ndi kukonzanso. Mofanana ndi momwe chipolopolocho chimapangidwira, machubu amapangidwanso mofanana, koma njira yowonjezera yowonjezera imayikidwa kuti ikhale yowonjezereka.
OCTG Pipe Standard
Mofanana ndi muyezo chitoliro chipolopolo, chitoliro OCTG mu API 5CT alinso zinthu zomwezo (J55/K55, N80, L80, P110, etc.), koma m'mimba mwake chitoliro akhoza mpaka 4 1/2″, ndipo umatha. m'mitundu yosiyanasiyana monga BTC, EUE, NUE, ndi premium. Nthawi zambiri, kulumikizana kwakukulu kwa EUE.