1. J55 Casing yog dab tsi?
J55 yog qib steel casing yeeb nkab uas txhais los ntawm covLub koom haum American Petroleum (API) Specification 5CT. Nws yog ib qho nruab nrab - qib zog feem ntau siv hauv kev tsim kho zoo rau kev lag luam roj thiab roj.
"Casing": Qhov no yog qhov loj - txoj kab uas hla cov yeeb nkab uas tau muab tso rau hauv lub qhov dej drilled roj lossis roj thiab cemented rau hauv qhov chaw. Nws lub luag haujlwm tseem ceeb yog:
Tiv thaiv lub qhov dej kom tsis txhob tawg.
cais cov av sib txawv (thiab lawv cov kua dej / qhov siab) ntawm ib leeg.
Muab ib tug conduit rau cov tubing ntau lawm thiab khoom siv.
"Seamless" (SMLS): Cov yeeb nkab yog tsim los ntawm cov khoom cylindrical steel billet uas yog cua sov thiab tho los ntawm qhov chaw los ua ib lub plhaub hollow. Qhov no yog qhov sib piv rau "seam{1}}welded" yeeb nkab, uas yog dov los ntawm steel phaj thiab muaj ib tug welded seam raws nws ntev.
Qhov zoo ntawm Seamless: Feem ntau muaj zog dua, zoo ib yam ntawm cov duab thiab phab ntsa tuab, thiab zoo dua haum rau siab -siab, kev siv tseem ceeb vim nws tsis muaj qhov tsis muaj zog ntawm cov kab weld.
"J55": Qhov no yog cov khoom siv qib tsim. "J" qhia nws cov tshuaj muaj pes tsawg leeg thiab cov yam ntxwv ntawm kev ua haujlwm raws li API tus qauv.
2. Cov ntsiab lus tseem ceeb (API 5CT)
| Feature | Specification rau J55 |
|---|---|
| Kev tswj hwm tus qauv | API 5CT (Liab tsab yog API 5CT 9th Edition, tab sis nws feem ntau raug xa mus los ntawm kev nthuav dav 8th Edition) |
| Hom | Casing thiab Tubing |
| Kev tsim khoom | Seamless (SMLS) lossis Electric Resistance Welded (ERW). Seamless yog ntau dua rau kev pabcuam tseem ceeb. |
| Yield zog | Yam tsawg kawg nkaus:55,000 psi (379 MPa) Qhov siab tshaj plaws:80,000 psi (552 MPa) |
| Tensile zog | Ua raws li API cov cai, tab sis feem ntau nyob ib ncig ntawm 75, 000 - 95,000 psi. |
| Hardness | Qhov siab tshaj plaws hardness tsawg dua los yog sib npaug rau 22 HRC (Rockwell C) rau J55, uas pab nrog Sulfide Stress Cracking (SSC) tsis kam nyob rau hauv cov kev pabcuam qaub qaub. |
| Kev ntsuas siab | Txhua qhov ntev ntawm cov casing yog hydrostatically sim rau ib qho kev siab raws li nws qhov loj me, phab ntsa thickness, thiab qib. |
3. Tshuaj muaj pes tsawg leeg
Cov tshuaj muaj pes tsawg leeg rau J55 yog qhov yooj yim, vim nws yog carbon{1}}manganese hlau. Feem ntau cov feem pua ntawm qhov hnyav yog feem ntau:
Cov pa roj carbon (C):0.34 - 0.39% (rau SMLS)
Manganese (Mn): 1.15 - 1.40%
Phosphorus (P):Tsawg dua lossis sib npaug li 0.030%
Sulfur (S):Tsawg dua lossis sib npaug li 0.030%
Silicon (Si):Ib qhov ntau yam yog teev los ntawm cov chaw tsim khoom.
Nws uatsis yogmuaj cov khoom tseem ceeb ntawm chromium, molybdenum, los yog lwm yam alloying ntsiab lus uas muaj nyob rau hauv siab dua -qib corrosion- resistant casings xws li L80 los yog C95.
4. Qhov zoo thiab yam ntxwv
Tus nqi -zoo:J55 yog ib qho ntawm cov qib API casing uas pheej yig tshaj plaws.
Muaj zog txaus:Nrog rau 55,000 psi yam tsawg kawg nkaus tawm lub zog, nws yog haum rau ntiav mus rau nruab nrab - qhov tob nrog rau nruab nrab siab.
Zoo Weldability:Nws yooj yim tshuaj muaj pes tsawg leeg ua rau nws kuj yooj yim rau welding rau kev sib txuas thiab txuas hauv daim teb.
Me ntsis SSC Resistance:Nws qhov qis qis ua rau nws muaj qee qhov kev tiv thaiv rau Sulfide Stress Cracking hauv ib puag ncig nrog me me ntawm H₂S (kev pabcuam qaub), tab sis nws yogtsis yogntsuas raws li qhov tseeb "kev pabcuam qaub" zoo li L80 Hom 1 lossis C90.
5. Kev siv ntau
J55 seamless casing yog dav siv hauv:
Puag mus rau nruab nrab qhov tob tob roj & Gas Wells:Raws li cov casing saum npoo, nruab nrab casing, los yog tsim cov casing nyob rau hauv uas tsis yog - ib puag ncig txhoj puab heev.
Dej qhov dej:Rau casing loj - txoj kab uas hla dej.
Geothermal Wells (Tsawg-Temp):Nyob rau hauv qis dua -tej thaj chaw kub ntawm cov ntawv thov.
Kev siv tus qauv:Qee zaum siv rau hauv kev tsim kho rau piling lossis kev txhawb nqa vim nws lub zog thiab muaj.
6. Sib piv nrog Lwm Cov Qib Casing
| Qib | Min. Yield zog (psi) | Cov yam ntxwv tseem ceeb & Kev siv ib txwm siv |
|---|---|---|
| J55 | 55,000 | Kev lag luam, lub hom phiaj dav dav.Qhov tob / nruab nrab qhov tob, ib puag ncig me me. |
| K55 | 55,000 | Zoo ib yam li J55 tab sis nrog cov tshuaj sib txawv me ntsis. Tsis muaj qhov siab tshaj tawm lub zog. Feem ntau siv interchangeably. |
| N80 | 80,000 | Siab zog.Rau qhov tob tob thiab siab dua. Los ntawm ob hom: N80-1 (tus qauv) thiab N80-Q (quenched & tempered). |
| L80 | 80,000 | Siab zog nrog corrosion kuj.Qhov mus- rau qib rau qhov dej nrog H₂S (kev pabcuam qaub). Ntau tshaj li J55 / N80. |
| P110 | 110,000 | Siab zog heev.Rau qhov tob, siab - qhov dej siab. Tsis tiv taus SSC. |
Cov ntsiab lus
J55 Seamless Casingyog ntau yam, tus nqi- ua haujlwm tau zoo, thiab txhim khu kev qha ua haujlwm hauv kev lag luam roj thiab roj. Nws txoj kev tsim seamless muab lub zog zoo thiab kev siab ncaj ncees, ua rau nws qhov kev xaiv zoo tshaj plaws rau feem ntau ntawm cov qauv zoo tsim qhov twg cov qib siab tshaj plaws ntawm corrosion tsis kam. Thaum muab cov yeeb nkab no, nws yog ib qho tseem ceeb kom ntseeg tau tias nws nqa cov yeeb nkabAPI Monogramlos lav nws ua tau raws li cov qauv kev ua tau zoo thiab kev ua tau zoo.
