J55 steel yeeb nkab yog cov yeeb nkab tshwj xeeb rau cov roj drilling thiab roj thiab roj tsheb thauj mus los. Nws belongs rau API tus qauv casing cov cuab yeej, thiab lub ntsiab steel qib yog J-55. Cov khoom siv suav nrog DZ series geological drilling steel, tsim los ntawm cov txheej txheem kub dov lossis txias txheej txheem, thiab ua raws li SY / T6194-96 thiab API SPEC 5CT cov qauv. Raws li hom xov, nws tau muab faib ua cov xov luv luv thiab cov xov ntev ntev, thiab cov khoom siv ruaj khov txhawb qhov ntev ntawm R-1 (4.88-7.62m) rau R-3 (10.36m thiab siab dua).
Cov yam ntxwv ua haujlwm
Mechanical Properties
Yield zog: 379-552 MPa, muaj peev xwm tiv taus kev tsim siab thiab tensile thiab compressive stresses thaum lub sij hawm drilling.
Tensile Strength: Ntau dua los yog sib npaug rau 517 MPa, ua tau raws li cov kev xav tau ntawm cov khoom siv rau kev sib tw thiab khiav cov hlua tho hauv cov khoom siv drilling.
Elongation: Tsis pub dhau lub ntsuas qhov ntev ntawm 50.8 hli, qhov tsawg kawg nkaus elongation yog siab dua li ntawm K55 steel qib, haum rau kev khoov lossis tensile ua cov xwm txheej uas yuav tsum tau muaj qee yam ntawm deformation muaj peev xwm.
Chemical Composition Optimization
Phosphorus (P) Tsawg dua lossis sib npaug li 0.030%, Sulfur (S) Tsawg dua lossis sib npaug li 0.030%: nruj me ntsis txwv cov ntsiab lus ntawm cov khoom tsis zoo kom txo tau cov kev cuam tshuam ntawm kev sib koom ua ke ntawm toughness.
Lwm cov ntsiab lus: Qhov sib ntxiv ntawm cov ntsiab lus alloying (xws li Cr, Mo) tsis yog qhov yuav tsum tau ua; carbon-manganese (C-Mn) system yog siv los ua kom muaj qhov sib npaug ntawm cov khoom siv yooj yim.
Impact Resistance
Nyob rau hauv CVN Charpy qhov kev ntsuam xyuas qhov cuam tshuam, qhov cuam tshuam lub zog yog piv rau cov qib K55 steel, muaj peev xwm tiv taus qhov cuam tshuam rau lub sijhawm drilling thiab txo qhov kev pheej hmoo ntawm kev tawg tawg.
Economic Efficiency thiab Versatility
Tus nqi zoo: Raws li qib qib steel qib hauv API 5CT tus qauv, J55 yog pheej yig dua li qib siab -lub zog steel xws li L80 thiab P110, ua rau nws haum rau cov ntawv loj -.
Dav Specification Coverage: Sab nraud txoj kab uas hla 114.3-508mm, phab ntsa thickness 5.21-16.13mm, txhawb ntau hom xov xws li STC (short round thread), LTC (ntev round thread), thiab BTC (trapezoidal thread).
Kev soj ntsuam nruj nruj
Tsis yog-Kev kuaj kev puas tsuaj: Nto thiab qhov tsis xws luag yog kuaj pom siv ultrasonic thiab magnetic particle testing kom ntseeg tau qhov kev ncaj ncees ntawm lub casing.
Hydrostatic Pressure Test: Txheeb xyuas qhov ua tau zoo ntawm kev sib khi kom tsis txhob muaj kev pheej hmoo ntawm kev tawg.
Flattening Test: Ntsuas cov yas deformation muaj peev xwm los xyuas kom meej lub casing adaptability nyob rau hauv complex formations.
Daim ntawv thov
API 5CT J55 seamless casing yog hom siv dav hauv kev lag luam roj thiab roj. Nws cov ntawv thov tseem ceeb suav nrog:
Nyias thiab nruab nrab -Kev Pabcuam Zoo Siab
Haum rau cov roj ntiav thiab roj qhov dej uas muaj nruab nrab tsim siab. Los ntawm cov txheej txheem cementing, nws tsim cov qauv ruaj khov zoo, tiv thaiv kev tawg.
Tsis yog -Corrosive Ib puag ncig
Hauv kev tsim tsis muaj corrosive gases xws li hydrogen sulfide (H₂S) lossis carbon dioxide (CO₂), J55 casing yog qhov kev xaiv zoo tshaj vim nws cov nqi kom zoo dua.
Kev sib piv: Hauv cov cheeb tsam acidic (xws li cov uas muaj H₂S), nws yog ib qho tsim nyog yuav tsum tau hloov mus rau corrosion -cov qib steel resistant xws li L80 lossis C90.
Dej Qhov Dej thiab Geological Kev Tshawb Fawb
Siv hauv dej zoo drilling los txhawb lub qhov dej thiab cais cov dej sib txawv; Hauv kev tshawb nrhiav geological, nws ua haujlwm ib ntus casing los tiv thaiv cov khoom siv drilling.
Tsawg-Cov Nqi Them Nqi
Hauv pob nyiaj siv - cov haujlwm tseem ceeb, J55 yog dav siv rau saum npoo thiab cov txheej txheem txheej txheem vim nws pheej yig thiab txaus txaus.
