L80thiab N80 yog ob qib roj casing steel hauv API 5CT tus qauv nrog cov qib zoo sib xws tab sis qhov sib txawv tseem ceeb hauv kev siv thiab kev ua haujlwm zoo. Qhov sib txawv tseem ceeb yog tias L80 muaj zog tiv thaiv corrosion thiab haum rau sulfur -ib puag ncig, thaum N80 tsom ntau dua rau kev siv tshuab thiab kev lag luam thiab tau siv dav hauv cov pa nruab nrab thiab qhov tob tob.
Nrhiav rau L80 Sour Service Casing?Xa koj cov specs rau ib nqe lusthiab thoob ntiaj teb shipping xaiv nyob rau hauv 1 teev.
L80 thiab N80 Oilfield Casing Comparison
| Cov khoom sib piv | L80 (Tib 1) | N80-1 / N80-Q |
| API Group | Pab pawg 2 | Pawg 1 |
| Environmental Suitability | Kev Pab Cuam (
H2SH2S resistant) |
General / Sweet Service |
| Xim Code | Ib Red + Ib Brown Band | Ib Band |
| Nqe Positioning | Siab dua (Vim kev kho mob nyuaj thiab kev sim) | Nruab Nrab (Nqis -kev daws teeb meem zoo rau qhov dej tob) |
L80 thiab N80 Casing thiab Tubing Mechanical Properties Sib piv
| Parameter | L80 (Tib 1) | N80-1 / N80-Q |
| Yield zog | 552 - 655 MPa (80 - 95 ksi) | 552 - 758 MPa (80 - 110 ksi) |
| Tensile zog | Ntau dua lossis sib npaug rau 655 MPa (95 ksi) | Ntau dua lossis sib npaug rau 689 MPa (100 ksi) |
| Hardness txwv | Tsawg dua los yog sib npaug rau 23 HRC (Yuav tsum tau Max) | Tsis muaj kev txwv hardness |
| Hardness Variation | nruj me ntsis txwv nyob rau hauv ib lub yeeb nkab | Tsis xav tau |
| Min. Elongation | Siab dua ductility | Muab xam raws li tus qauv |
L80 thiab N80 Roj Thiab Gas Casing Pipes Chemical Composition Comparison
| Khoom (%) | L80 (Tib 1) | N80-1 / N80-Q |
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.43 | Tsis muaj kev txwv tshwj xeeb (Tshwj xeeb kev txiav txim siab) |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 1.90 | Tsis muaj kev txwv tshwj xeeb (Tshwj xeeb kev txiav txim siab) |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.030 | Tsawg dua lossis sib npaug li 0.030 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.010 | Tsawg dua lossis sib npaug rau 0.030 (Looser dua L80) |
| Cr / Mo | Feem ntau ntxiv los txhim kho hardenability | Txhais los ntawm cov chaw tsim khoom |
L80 thiab N80 Roj Zoo Drilling Casing Pipe Chaw Tsim Khoom & Kev kho cua sov
| Yam khoom | L80 | N80-1 | N80-Q |
| Kev kho cua sov | Yuav Tsum Quenched & Tempered (Q&T) | Normalized (N) lossis Normalized & Tempered (N&T) | Yuav Tsum Quenched & Tempered (Q&T) |
| Grain Size Req. | Yuav tsum yog Fine Grain (Ntau dua lossis sib npaug rau Qib 5) | Tsis xav tau | Tsis xav tau |
| Txheej txheem | Seamless (S) lossis Electric Welded (EW) | Seamless (S) lossis Electric Welded (EW) | Seamless (S) lossis Electric Welded (EW) |
L80 thiab N80 Oilfield Casing Pipes Impact Test & Inspection
| Qib | Charpy V-notch Impact Test |
| L80 | Yuav tsum tau ua. Yuav tsum tau kuaj ntawm qhov ntsuas kub kom ntseeg tau tias muaj kev tiv thaiv kom tawg tawg. |
| N80-1 | Tsuas yog kuaj yog tias tshwj xeeb thov los ntawm tus neeg yuav khoom hauv daim ntawv xaj khoom. |
| N80-Q | Yuav tsum tau ua(Tshwj xeeb rau Q&T xeev ntawm N80). |
Qhov twg xaiv?
| Scenario | Pom zoo xaiv | Yog vim li cas |
| Qhov dej muaj
H2SH2S (Sour Wells) |
L80 | Qhov kev xaiv nyab xeeb nkaus xwb. N80 yuav raug kev txom nyem los ntawm Sulfide Stress Cracking (SSC). |
| Qhov dej tob / Siab siab (No
H2SH2S ) |
N80 | Economic thiab txhim khu kev qha. N80 tso cai rau kom muaj zog tawm los ntau dua qhov txwv. |
| Cov peev nyiaj- txwv, qhuav / tsis yog-corrosive env. | N80-1 | Tus nqi qis tshaj; tsis xav tau cov txheej txheem Q&T kim. |
| Siab zog + Tsawg-kub toughness | L80 los yog N80-Q | Q&T steel muaj qhov toughness zoo dua li Normalized-tsuas yog (N80-1) steel. |
GNEE API 5CT OCTG Hoobkas
FAQ
L80 yog dab tsi?
l80 yogtsawg- alloy steel siv feem ntau hauv kev siv roj thiab roj, tshwj xeeb tshaj yog rau cov casing thiab tubing. Nws muaj lub zog zoo thiab ua haujlwm rau hydrogen sulfide kev nyuaj siab corrosion cracking. Nws ua ke ntawm toughness thiab durability ua rau nws haum rau xav tau ib puag ncig nyob rau hauv lub zog sector.
L80 sib npaug li cas?
L80 feem ntau yog siv nyob rau hauv qhov dej nrog qaub (hydrogen sulfide) ib puag ncig, casing, ntau lawm tubing, coupling Tshuag, pup pob qij txha, thiab ntau yam downhole accessories. L80 (API 5CT) yog nruab nrab carbon steel thiab sib npaug rauTIAB SA 4140.
N80 yeeb nkab yog dab tsi?
APT 5CT N80 yogib hom steel yeeb nkab uas feem ntau yog siv rau hauv kev siv zoo. Nws yog tsim los rau cov kev qhia tshwj xeeb uas tau teev tseg hauv API (American Petroleum Institute) cov qauv. N80 lub npe txhais tau hais tias cov yeeb nkab no tau raug sim thiab ua tau raws li cov kev cai tshwj xeeb thiab cov khoom siv tshuaj.
