Tom ntej: L80 Seamless Steel Yeeb Nkab
Hom:Seamless (SMLS) steel yeeb nkab, txhais tau tias nws tsis muaj welded seam, muab superior zog thiab siab ncaj ncees.
Qib: L80yog ib qib kev faib tawm los ntawm American Petroleum Institute (API) specification 5CT.
Kev Siv Tseem Ceeb:Downhole daim ntaub ntawv nyob rau hauv cov roj thiab roj qhov dej, xws licasingthiabcev.
Cov yam ntxwv tseem ceeb: A quenched thiab temperedalloy steel, muab qhov zoo sib npaug ntawm lub zog siab, toughness, thiab corrosion kuj.
1. "L80" txhais li cas?
Lub npe "L80" tawg raws li hauv qab no:
"L": Qhov no qhia tau tias nws yog qib nrog cov kev cai tshwj xeeb rau kev tiv thaiv corrosion. Cov kav dej uas muaj lub npe "L" feem ntau yog siv nyob rau hauv ib puag ncig uas corrosion (xws li CO₂ lossis H₂S) yog ib qho kev txhawj xeeb.
"80": Qhov no txhais tau tiasyam tsawg kawg nkaus yield zogntawm lub cev, uas yog80,000 phaus ib square inch (psi)los yog kwv yees li552 MPa ua.
2. Cov ntsiab lus tseem ceeb thiab cov qauv
L80 seamless kav yog tsim los ua kom tau raws li qhov yuav tsum tau nruj ntawm covAPI 5 CT(Specification rau Casing thiab Tubing) txheem. Qhov no ua kom zoo ib yam khoom siv, qhov ntev, thiab kev ua haujlwm ntawm txhua tus neeg tsim khoom.
Kev tswj hwm tus qauv: API 5 CT
Hom:Seamless (SMLS)
Delivery condition:Quenched thiab Tempered (Q&T) kev kho cua sov yog yuav tsum tau rau L80. Cov txheej txheem no suav nrog cua sov cov hlau thiab ua kom txias sai (quenching), tom qab ntawd rov ua kom sov rau qhov kub thiab txias (tempering) kom ua tiav qhov xav tau lub zog thiab tawv.
3. Mechanical Properties (Raws li API 5CT)
Cov lus hauv qab no qhia txog cov khoom siv kho tshuab tseem ceeb rau qib L80:
| Khoom | Tus nqi |
|---|---|
| Qib | L80 |
| Hom | 1 / 9Cr / 13Cr |
| Yam tsawg kawg Yield Strength | 80,000 psi (552 MPa) |
| Maximum Yield zog | 95,000 psi (655 MPa) |
| Yam tsawg kawg Tensile Strength | 95,000 psi (655 MPa) |
| Hardness (HRC, max) | 23 (Rau L80 Hom 1) |
| Yield/Tensile Ratio | 0.85 (max rau L80-1) |
Lus Cim rau Hardness:Qhov siab tshaj plaws hardness ntawm 23 HRC yog ib qho tseem ceeb feature. Nws ua rau L80 haum raukev pabcuam qaub(ib puag ncig uas muaj H₂S roj) raws li cov hlau hnyav dua yog qhov raug rau Sulfide Stress Cracking (SSC).
4. Tshuaj muaj pes tsawg leeg
Cov tshuaj muaj pes tsawg leeg sib txawv me ntsis nyob ntawm "Hom" ntawm L80, uas yog tsim los rau qhov sib txawv corrosive ib puag ncig.
| Lub ntsiab | L80 Hom 1 (Standard) | L80 9Cr | L80 13Cr |
|---|---|---|---|
| Cov pa roj carbon (C) | 0.43% max | 0.15% max | 0.15% max |
| Manganese (Mn) | 1.90% max | 0.40-0.70% | 0.25-1.00% |
| Chromium (Cr) | - | 8.00-10.00% | 12.00-14.00% |
| Molybdenum (hli) | - | 0.90-1.10% | 0.15% max |
L80 Hom 1:Tus qauv carbon{0}}manganese steel. Zoo rau qhov chaw corrosive dav (feem ntau CO₂).
L80 9Cr & 13Cr:Cov no yogchromium alloys. Cov ntsiab lus siab chromium tsim cov txheej txheem tiv thaiv kev tiv thaiv, muab kev tiv thaiv zoo rau CO₂ corrosion (qab zib corrosion) . 13Cr feem ntau hu ua "super martensitic" stainless hlau thiab muaj kev ua tau zoo dua.
5. Kev siv ntau
L80 seamless kav yog siv los uaOCTG (Oil Lub Tebchaws Tubular Khoom):
Casing:Cov yeeb nkab loj - txoj kab uas hla khiav mus rau hauv qhov dej drilled thiab cemented nyob rau hauv qhov chaw los tiv thaiv lub qhov los ntawm kev sib tsoo thiab cais cov cheeb tsam sib txawv.
Tubing:Cov me me - txoj kab uas hla cov yeeb nkab khiav hauv lub casing los ntawm cov roj los yog cov pa tawm mus rau saum npoo.
Nws qhov tshwj xeeb sib npaug ntawm lub zog, toughness, thiab corrosion kuj ua rau nws zoo tagnrho rau:
Nruab nrab - qhov tob mus rau qhov tob tob.
Qhov dej nrog cov qib CO₂ nruab nrab.
Daim ntawv thov kev pabcuam qaub (thaum hardness tswj tau).
Cov cheeb tsam uas xav tau lub zog siab yam tsis muaj qhov nyuaj ntawm cov qib siab dua li P110.
6. Qhov zoo ntawm L80 Seamless Yeeb Nkab
Siab zog:Lub 80,000 psi yield zog tuaj yeem tiv taus siab downhole pressures thiab loads.
Tsis muaj Seam:Cov txheej txheem tsim seamless tshem tawm qhov tsis muaj zog ntawm qhov ntev ntawm lub vuam, ua rau nws txhim khu kev qha nyob rau hauv kev kub siab thiab kev siv tseem ceeb.
Zoo Toughness:Lub quenched thiab tempered qauv muab kev cuam tshuam zoo, tshwj xeeb tshaj yog nyob rau hauv qis kub.
Sour Service Resistance:Lub hardness tswj tau (max 23 HRC) ua rau nws nyiam xaiv rau H₂S- muaj ib puag ncig ntawm cov qib nyuaj.
Corrosion Resistance:Tshwj xeeb tshaj yog 9Cr thiab 13Cr variants, uas muaj kev tiv thaiv zoo heev rau CO₂ corrosion.
7. Sib piv nrog rau lwm cov qhab nia
vs j 55:.L80 muaj zog dua thiab tawv dua li J55. J55 tsis yog quenched thiab tempered thiab yog siv rau tsawg xav tau, qhov dej ntiav.
vs:n80.N80 muaj lub zog zoo sib xws tab sis feem ntau muab rau hauv cov xwm txheej zoo li qub. Muaj ob hom N80 (Hom Q&T thiab tsis yog-Q&T). L80 yog ib txwm Q&T thiab muaj kev tswj nruj dua ntawm cov tawv tawv thiab tshuaj lom neeg muaj pes tsawg leeg, ua rau nws tsim nyog rau kev pabcuam qaub.
vs:p110.P110 yog qib siab dua - qib zog (110,000 psi tawm los) tab sis nyuaj dua. Nws yog feem ntautsis yogpom zoo rau kev pabcuam qaub vim nws raug rau SSC.
Hauv cov ntsiab lus, covL80 Seamless Steel Yeeb Nkabyog tus hwm, siab -kev ua tau zoo tubular cov khoom uas yog lub workhorse rau downhole daim ntaub ntawv nyob rau hauv cov roj thiab roj kev lag luam, muab ib tug zoo sib tov ntawm lub zog, ductility, thiab tswj corrosion kuj.
