API 5CT L80Yog ib qho qhab nia hlau nquag heev thiab tubing siv hauv cov roj thiab roj kev lag luam. Nws txhais los ntawm tusMiskas lub koom haum (API) tshwj xeeb 5ct.
Tus yam ntxwv tseem ceeb ntawm L80 yog nwssib npaug ua ke ntawm lub zog thiab tiv taus rau sulfide kev ntxhov siab tawg (SSC), ua rau nws haum rau kev muaj mob ib puag ncig ib puag ncig (ib puag ncig uas muaj hydrogen sulfide, h₂s).
Cov yam ntxwv tseem ceeb ntawm L80:
Yam tsawg kawg nkaus paib zog:80,000 psi (80 ksi)- Tus "80" nyob rau hauv lub npe.
SSC tiv:Nws belongs rau api 5ct'sPawg 2, uas muaj cov qib uas muaj cov khoom siv hardness yuav tsum muaj thiab SSC tsis kam yuav tsum tau ua. Qhov siab tshaj plaws tso cai hardness yog23 HRC.
Hom:L80 muaj nyob rau hauv ntau hom mellurgical kom haum tshwj xeeb corrosive ib puag ncig:
L80 Hom 1:Txheem chromium - molybdenum hlau.
L 80 9 cr:Muaj txog li ntawm 9% chromium rau kev txhim kho corrosion tsis kam.
L 80 13 cr:Lub martensitic stainless hlau muaj kev tiv thaiv zoo heev rau kev corrosion.
Kev Tshawb Fawb & Cov Khoom Siv Cov Ntaub Ntawv
Cov rooj txuas hauv qab no sau lub ntsiab lus no cov khoom tseem ceeb thiab tshuaj lom neeg raws li API 5ct.
Cov lus 1: Cov khoom siv kho tshuab ntawm API 5CT L80
| Ntiag tug | Tus nqi | Sau ntawv | |
|---|---|---|---|
| Teem nqi | L80 | - | |
| Kev qhia tshwj xeeb | API 5CT | - | |
| Paib lub zog (min.) | 80,000 psi | 552 mpa | |
| Paib lub zog (max.) | 95,000 psi | 655 MPa | |
| Tensile lub zog (min.) | 95,000 psi | 655 MPa | Qhov tsawg kawg tensile lub zog yuav tsum muaj tshwj xeeb rau qee cov phab ntsa thicknesses. |
| Hardness (max.) | 23 HRC | Tseem ceeb rau SSC tsis kam.Rockwell C ntsuas. | |
| Elongation | Sib txawv nrog phab ntsa thickness | Raws li ib tus API 5ct mis. |
Cov Lus 2: Qhov hnyav% qhov siab tshaj plaws, tshwj tsis yog muaj ntau yam yog qhia)
Cov lus no qhia tau tias lub hauv paus uas yuav tsum tau ua. Nco ntsoov tias 9cr thiab 13cr tau muaj kev sib txawv tshwj xeeb.
| Lub ntsiab | L80 hom 1 | L 80 9 cr | L 80 13 cr | Sau ntawv |
|---|---|---|---|---|
| Carbon (c) | 0.40% max | 0.15% Max | 0.15% Max | Txo cov pa hluav taws txhim kho weldability thiab tawv. |
| Manganese (mn) | 1.90% Max | 0.40-1.00% | 0.25-1.00% | - |
| Phosphorus (p) | 0.020% Max | 0.020% Max | 0.020% Max | Impurity, khaws qis. |
| Sulphur (s) | 0.010% max | 0.010% max | 0.010% max | Impurity, khaws cia tsawg rau SSC tsis kam. |
| Silicon (si) | 0.45% Max | 0.50% max | 0.50% max | - |
| Chromium (cr) | - | 8.00-10.00% | 12.00-14.00% | Qhov tseem ceeb rau corrosion tsis kam. |
| Molybdenum (mo) | - | 0.90-1.10% | - | Txhim kho lub zog thiab corrosion tsis kam. |
| Npib tsib caug (ni) | 0.25% max * | 0.50% max | 0.50% max | * Max yog 0.25% rau SSC tiv taus. |
Cov Lus 3: Cov ntaub ntawv raug (casing)
API 5CT L80 yog tsim hauv ntau qhov ntau thiab tsawg. Cov lus hauv qab no qhia cov qauv piv txwv.
| Nominal loj (od) | Nyhav (LB / FT) | Phab Ntsa Thickness (Hauv) | Drift inch (hauv) | Sab hauv cov txiaj ntsig siab (PSI)* Kwv yees li. |
|---|---|---|---|---|
| 4-1/2" | 11.60 | 0.271 | 3.965 | 7,260 |
| 5-1/2" | 17.00 | 0.304 | 4.857 | 6,340 |
| 7" | 23.00 | 0.317 | 6.366 | 5,480 |
| 9-5/8" | 40.00 | 0.395 | 8.835 | 5,220 |
| 10-3/4" | 40.50 | 0.350 | 9.978 | 4,080 |
NCO TSEG: Sab hauv cov khoom tau tawm los yog ib tus nqi suav raws li tsawg kawg yog lub zog muaj zog thiab tuaj yeem sib txawv. Nco ntsoov hais txog cov chaw tsim khoom yog cov ntawv sau rau cov nqi kom haum.
Cov Kev Siv Cov Ntawv Siv
Ntau Lawm Casing / Tubing:Nyob rau hauv cov roj thiab roj zoo nrog theem ntawm cov h ₂s thiab / lossis CO₂.
Nruab nrab casing:Thoob plaws thaj chaw uas tej zaum yuav muaj roj qaub sur.
Tubing:Raws li cov conduit rau cov kua ntau lawm cov khoom lag luam uas xav tau tshaj li cov pa hlau (zoo li J55, N80-1) muaj.
Qhov tseem ceeb
L80 vs. N80:Thaum ob qho tib si muaj tib yam tsawg kawg nkaus zog zog (80 ksi),N80yog aPab Pawg 1Qib nrogTsis muaj qhov yuav tsum tau ua SSC tiv thaivCov. Nws yog feem ntau pheej yig dua tab sis yuav tsum tsis txhob siv nyob rau hauv cov kev pab qaub. L80 yog qhov kev xaiv tshwj xeeb rau ib puag ncig xws li.
L 80 13 cr vs. tus qauv L80:L 80 13} cr yog qhov tseem ceeb ntawm cov hlau stainless thiab yog xaiv tshwj xeeb rau cov nov nrog high ib nrab kev ntsuas ntawm kev sib ntaus sib tua qab zib corrosion.
Tag
API 5CT L80 yog ib qho ntau, nruab nrab {2} Taug kev qib uas muab kev sib npaug tseem ceeb rau cov engtress tsim qhov chaw uas corrosion yog kev txhawj xeeb. Nws cov qauv qauv qauv ua kom muaj kev cia siab thiab sib txuas lus los ntawm cov chaw tsim khoom thoob ntiaj teb thoob ntiaj teb. Rau cov ntawv thov tseem ceeb, ib txwm sab laj tag nrho API 5CT cov ntawv pov thawj thiab cov ntawv pov thawj ntawm zeb cov ntawv pov thawj- mtc).
