Technical Specification: API 5CT V80-Q API Tubing
1. Core Specification & Yam khoom
| Specification | Kev piav qhia |
|---|---|
| Kev tswj hwm tus qauv | API Specification 5CT- Casing thiab Tubing |
| Yam khoom | Tubing- Cov hlua sab hauv tshaj plaws ntawm cov yeeb nkab hauv qhov ua tiav, siv los xa cov kua dej rau saum npoo. |
| Lub npe | V80-Q- Tus "V" qhia tias muaj zog tawm los ntawm 80,000 psi, thiab "-Q" xaiv qhov quenched & Tempered kev kho cua sov. |
2. Khoom Qib & Mechanical Properties (yam tsawg kawg nkaus)
Qib "V80" txhais qhov tsawg kawg nkaus txhua yam kev ua tau zoo. Lub ntsiab lus "-Q" yog qhov tseem ceeb vim nws qhia txog cov txheej txheem tsim khoom.
| Khoom | Requirement / Tus nqi | Sau ntawv |
|---|---|---|
| Yam tsawg kawg nkaus Yield Strength | 80,000 psi (552 MPa) | Qhov no yog qhov kev ntxhov siab ntawm qhov pib deformation mus tas li. |
| Yam tsawg kawg Tensile Strength | 95,000 psi (655 MPa) | Qhov siab tshaj plaws ntawm cov khoom siv tuaj yeem tiv taus. |
| Yield-rau-Tensile Ratio | Tsawg dua lossis sib npaug li 0.85 | Qhov qis dua qhia tau zoo dua deformability thiab tsis kam mus rau downhole tawg / tawg tsis ua hauj lwm. |
| Hardness | Feem ntau Tsawg dua lossis sib npaug rau HRC 23 (rau V80-Q) | Tswj los txo cov kev pheej hmoo ntawm Sulfide Stress Cracking (SSC). V80-Q muaj qhov siab tshaj plaws hardness txwv. |
| Elongation | Raws li API 5CT cov qauv | Nws txawv nrog phab ntsa thickness thiab qib. |
3. Kev kho cua sov: quenched & Tempered (Q&T)
Cov"-Q"suffix yog qhov sib txawv tseem ceeb tshaj plaws:
Txheej txheem:Cov yeeb nkab yog rhuab mus rau qhov kub siab (austenitizing), txias sai heev (quenched hauv dej los yog polymer), thiab tom qab ntawd rov ua kom sov kom qis dua (tempered).
Cov txiaj ntsig:Cov txheej txheem no tsim kom zoo, tsis tu ncua microstructure (tempered martensite / bainite), uas ua rau ib qho zoo heev.sib npaug ntawm lub zog, toughness, thiab uniformitythoob plaws hauv cov yeeb nkab phab ntsa.
Kev sib piv:Q&T yeeb nkab feem ntau muaj cov khoom siv kho tshuab zoo dua thiab kev ua haujlwm zoo ib yam dua li cov yeeb nkab ntawm tib qib.
4. Chemical Composition (Hloov ntau yam)
Cov tshuaj muaj pes tsawg leeg yog tswj kom ua tiav cov khoom siv kho tshuab thiab weldability.
| Lub ntsiab | Ntau yam (%) | Lub hom phiaj / nyhuv |
|---|---|---|
| Cov pa roj carbon (C) | 0.20 - 0.35 | Lub hauv paus tseem ceeb ntxiv dag zog. |
| Manganese (Mn) | 1.00 - 1.50 | Ua kom muaj zog thiab hardenability. |
| Silicon (Si) | 0.15 - 0.35 | Deoxidizer, ntxiv dag zog rau ferrite. |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.020 | impurity; khaws cia qis rau toughness. |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.010 | impurity; khaws cia tsawg heev rau kev txhim kho ductility thiab SSC tsis kam. |
| Lwm yam (Cr, Mo, Ni, thiab lwm yam) | Cov lej | Tej zaum yuav ntxiv rau cov khoom tshwj xeeb xws li hardenability. |
5. Daim ntawv thov & Cov ntsiab lus tseem ceeb
| Yam | Paub meej |
|---|---|
| Cov ntawv thov tseem ceeb | • Tubing ntau lawm nyob rau hauv cov qauv roj/gas qhov dej • Dej los yog roj txhaj tubing • Ua haujlwm thiab ua tiav cov hlua • Qhov dej xav tau lub zog nruab nrab (80 ksi tawm los). |
| Sour Service (H₂S) Suitability | Conditionally haum.V80-Q aQhov siab tshaj plaws hardness ntawm HRC 23tuaj yeem siv raume ntsis qaub kev pabraws li tau hais los ntawm NACE MR0175/ISO 15156. Kev tsim nyog zaum kawg yuav tsum muaj qhov project-kev tsim nyog tshwj xeeb thiab tuaj yeem tswj hwm kev sim ntxiv (xws li SSC xeem). Nws yogtsis yoginherently ib qib "SSC{0}}resistant" zoo li L80 lossis C110. |
| Qhov Zoo Tshaj Plaws | • Lub zog zoo-rau- toughness piv vim Q&T txheej txheem. • Cov khoom zoo sib xws ntau dua li cov qib qub. • Muaj dav thiab raug nqi -zoo rau ntau daim ntawv thov. |
| Yam Kev Txiav Txim Cov Ntaub Ntawv Xav Tau | • Loj:eg, 2-7/8", 3-1/2" OD • Phab ntsa Thickness / Nyhav:eg, 6.50 lb/ft, 9.20 lb/ft • Kev sib txuas xaus:Piv txwv li, API EUE (External Upset End), lossis cov xov zoo (VAM, HYDRIL, thiab lwm yam) • Ntev Ntau:Piv txwv li, Range 2 (~ 20-24 ft), Range 3 (~ 38-42 ft) |
6. Kev sib piv ceev: V80-Q vs. Cov Qib Zoo sib xws
| Feature | API 5CT V80-Q | API 5CT N80-1 / Q | Tom ntej: API 5CT L80-1 |
|---|---|---|---|
| Yield zog (min) | 80,000 psi | 80,000 psi | 80,000 psi |
| Kev kho cua sov | Quenched & Tempered | Quenched & Tempered | Quenched & Tempered |
| Max Hardness | HRC 23 (tus qauv) | HRC 23 | HRC 23 |
| Qhov Tseem Ceeb Distinction | Feem ntau suav hais tias a"tus nqi" lossis tus qauvQ&T 80-ksi qib. | Feem ntaucommon and tsoosQ&T 80-ksi qib. | Tshwj xeeb tsim thiab sim rau kev pabcuam qaub (H₂S). |
| Sour Service | Tej zaum yuav siv tau yog tias hardness tsawg dua los yog sib npaug rau HRC 23 raug txheeb xyuas. | Tej zaum yuav siv tau yog tias hardness tsawg dua los yog sib npaug rau HRC 23 raug txheeb xyuas. | Yog lawm,chemistry thiab txheej txheem yog optimized rau qaub kev pab cuam. |
Cov ntsiab lus: API 5CT V80-Q Tubingyog aquenched thiab tempered, nruab nrab -lub zog downhole yeeb nkab muab kev txhim khu kev qha zoo rau kev siv roj av dav dav. Nws cov yam ntxwv txhais yog Q&T txheej txheem, uas muab cov khoom siv kho kom zoo ib yam. Thaum nws tuaj yeem siv rau hauv qhov chaw qaub me me nrog kev tswj kom zoo, nws tsis yog tsim tshwj xeeb rau kev pabcuam corrosive hnyav xws li qee qib.
