Coiled Tubing (CT) yog qhov ntev ntev ntawm me me - txoj kab uas hla cov yeeb nkab uas yog spooled mus rau ib lub reel tib yam li cov xaim lossis cable yog qhwv rau ntawm lub nruas. Txoj haujlwm coiled tubing tso cai rau cov txheej txheem ntawm "snubbing" ntev ntev ntawm tubing nyob rau hauv thiab tawm ntawm ib tug nyob zoo los ntawm ib tug stripper BOP kev npaj. Lub ntsiab kom zoo dua ntawm Coiled Tubing yog tias nws tuaj yeem khiav mus rau hauv cov qhov dej, tiv thaiv lub taub hau siab (piv txwv li . 345 bar / 34,500 kPa lossis 5000 psi), thiab dhau los ntawm cov perforations, tsis muaj kev cuam tshuam ntau lawm lossis tua lub qhov dej (Tos thiab Nyhav - Driller's Method). Cov yeeb nkab loj tshaj plaws hauv kev siv yog 1.5 "txog rau 2.875", txawm tias muaj ntau qhov loj thiab siv.
Nyob rau hauv ib puag ncig offshore, Coiled Tubing tuaj yeem khiav mus rau hauv qhov dej kom sai li 3 teev, tom qab tso cov khoom siv rau ntawm lawj. Thaum lub tsheb thauj khoom siv rau kev ua haujlwm hauv av, lub sijhawm no tuaj yeem txiav mus rau 1.5 teev tom qab kev teeb tsa ntawm qhov chaw. Nrog rau qhov sib ntxiv ntawm qhov siab tshaj plaws ua haujlwm qhov tob ntawm 7700m (25,000 ft), uas tuaj yeem ua tiav ntawm kev khiav ceev ntawm 79m / feeb (260 ft / feeb), nws tuaj yeem pom tias Coiled Tubing yog tus nqi ntau heev -txoj kev zoo ntawm kev ua haujlwm downhole.
Cov txheej txheem coiled tubing pob tuaj yeem raug txhais raws li cov khoom siv saum npoo uas xav tau kom muaj kev nyab xeeb mus ncig ntawm coiled tubing hauv thiab tawm ntawm qhov dej:
- Coiled Tubing
- Reel Unit
- Lub hwj chim pob
- Chaw Tswj
- Tubing Injector Unit
- CT Cov cuab yeej tswj kev siab - Kev Tiv Thaiv Kev Tiv Thaiv (xws li lubricator thiab sab qhov rooj stripper)
Cov cuab yeej pab Coiled Tubing yog xav tau los xyuas kom meej tias cov raj xa mus rau qhov tob uas yuav tsum tau ua thiab lub hnab ntawv ua haujlwm (siab, qhov hnyav, thiab lwm yam) ntawm cov khoom siv tsis pub dhau lub sijhawm ua haujlwm. Cov khoom siv ntxiv uas cuam tshuam nrog hom kev ua haujlwm kuj tseem xav tau, xws li cov tso tsheb hlau luam rau nitrogen hloov chaw, lossis cov cuab yeej downhole, xws li zeb thiab lub cev muaj zog rau milling hauv kev ua haujlwm drilling, downhole av nkos tsav raucoiled tubing drilling tshuab.
Lub ntsiab lus no muab cov ntsiab lus ntawm cov khoom siv saum npoo av, txawm li cas los xij raws li kev siv tshuab tsim, ntau yam cuab yeej yuav raug kho kom zoo rau feem ntau cov ntawv thov.
Ntau yam ntawm coiled tubing pob khoom / units yog muaj los ntawm cov tuam txhab kev pabcuam. Kev xaiv ntawm cov cuab yeej no feem ntau txiav txim siab los ntawm daim ntawv thov thiab kev ua tiav zoo, piv txwv li kev pabcuam qaub, CT loj, thiab lwm yam. Tsis tas li ntawd, hybrid units muaj uas pab kom rov qab tau cov pa tubular, lossis lwm yam kev npaj ua haujlwm zoo uas yuav tsum tau ua raws li cov haujlwm ua haujlwm, ua ntej pib ua haujlwm coiled tubing. Cov hybrids no tau tsim muaj feem ntau hauv cov lus teb rau qhov zoo rov- cov kev cai nkag thiab coiled tubing drilling.
Cov khoom siv tag nrho ntawm cov khoom siv saum npoo siv thaum lub sijhawm ua haujlwm coiled tubing yuav sib txawv nyob ntawm txoj haujlwm yuav tsum tau ua.
Txawm li cas los xij, cov khoom siv tseem ceeb hauv qab no raug suav tias yog tus qauv:
Cov cuab yeej tseem ceeb
- CT Reel Unit
- Injector Head (nrog rau "gooseneck")
- Lub hwj chim pob
- Tswj Cabin (xws li load / qhov tob ntsuas)
Cov Khoom Siv Hluav Taws Xob / Cov Khoom Siv Zoo (kuaj kuj: Zoo Tswj)
- Khoom Box
- Quad Blowout Preventers (BOP)
- Shear Foob BOP
- Annular BOP (yeem)
Daim ntawv thov
Coiled tubing yog siv nyob rau hauv ntev, kab rov tav qhov dej, los yog es tsis txhob ntawm cable yog hais tias drilling los yog tiav cov kua yuav tsum tau circulated nyob rau hauv lub qhov dej. Coiled tubing tuaj yeem siv rau ob qho tib si ua haujlwm zoo thiab zoo drilling.
Nws qhov zoo dua piv rau kev ua haujlwm cable (Wireline) yog tias nws muaj peev xwm ua kom cov dej ntws mus rau hauv qhov dej. Lub coiled tubing kuj muaj lub zog ntau dua li cable thiab tuaj yeem nqa qhov hnyav ntawm txoj hlua ntev thiab hnyav dua. Nws kuj tseem siv tau rau hauv cov qhov dej uas muaj qhov ntev, kab rov tav, thiab qhov nyuaj ntawm qhov zoo.
Nws cov ntawv thov ntawm Workover Wells:
- Acid stimulation ntawm limestone formations,
- Kev tu thiab ntxuav lub qhov dej
- Perforation
- Pib- ntawm lub qhov dej nrog lub teeb ua kua
- Kev txhim kho cov cuab yeej ua tiav
- Pob zeb pob zeb
- Nuv ntses hauv kev ua haujlwm drilling.
Coiled Tubing Daim ntawv thov ua tiav
Ntau qhov kev ua haujlwm drilling kuj tau ua nrog CT ua txoj hlua ua haujlwm, tab sis kev ua haujlwm drilling nrog nws tsis muaj nyob hauv qee qhov chaw.
Coiled Tubing
Coiled tubing piav txog ib lub raj ntev uas dov rau hauv ib lub reel. Cov yeeb nkab yog ua los ntawm cov hlau alloy uas ua rau cov khoom hloov tau yooj yim thiab tib lub sijhawm muaj zog.
Lub raj yog ua los ntawm cov phaj uas tau dov rau hauv cov duab cylindrical. Lub tog raj kheej qhib tau mus rau qhov kev sib txuas uas txuas qhov kawg ntawm lub phaj ua ke raws qhov ntev ntawm cov yeeb nkab. Nws tag nrho yog tsim los ua ib lub raj ntev uas tau pub rau lub nruas cia.
Nws tuaj yeem khoov ib ncig ntawm lub nruas core yam tsis muaj kev tawg lossis tawg, tab sis cov yeeb nkab yog deformed mus tas li los ntawm qhov nkhaus uas nws tau khoov. Thaum lub raj raug rub tawm ntawm lub nruas, nws yog me ntsis nkhaus vim qhov khoov nws raug rau ntawm lub nruas.
Khiav Hauv Qhov
Lub raj yog rub tawm lub nruas los ntawm CT injector mounted rau saum lub qhov dej. Lub injector rub lub raj tawm ntawm lub nruas, thaum lub cev muaj zog me me rau ntawm lub hauv paus ntawm lub nruas tuav lub txee (brake) kom lub nruas tsis tig tag nrho ntev ntawm lub raj tawm dawb (lub cev khiav ).
Thaum cov yeeb nkab dhau los ntawm cov tshuaj txhaj tshuaj, nws tau ncaj me ntsis ua ntej nkag mus rau hauv qhov dej. Thaum CT raug rub tawm ntawm lub qhov dej, tus neeg teb xov tooj hloov cov kev taw qhia ntawm kev mus los ntawm lub injector, kom nws rub cov yeeb nkab tawm ntawm qhov dej. Nyob rau tib lub sijhawm, lub nruas yob los ntawm lub cev muaj zog, kom cov yeeb nkab yog dov zoo ntawm lub nruas.
Cov Barriers
Thaum CT yuav tsum tau khiav mus rau hauv lub qhov dej, lub coiled tubing BOP thiab ob strippers txuas rau saum lub qhov dej. Lawv ua raws li kev thaiv sab nraud. Tsis tas li ntawd, ob qho tib si - txoj kev li qub tau muab tso rau hauv qab ntawm lub coiled tubing, kom tsis txhob muaj dej tawm ntawm qhov dej los ntawm nws mus rau saum npoo.
Coiled tubing piv rau wireline thiab drilling
| Coiled tubing | Drill Pipe | Kab |
|---|---|---|
| zam kev nres thaumcev tpRIH & POOH txuas cov kav dej ua ke los yog sib nrug (kev sib txuas ) | yuav tsum nres thiab uakev sib txuasrau txhua qhov sawv ntsug | RIH / POOH sai dua ob qho tib si coiled tubing thiab laum yeeb nkab |
| tso cai rau cov kua dej | tso cai rau cov kua dej | kev ncig tsis tau |
| ntev -ntau thiab thrust | ntev -ntau thiab thrust | ntev -ntau yam tab sis me me thrust |
| zoo traction | qhov zoo tshaj plaws traction | me traction |
| tuaj yeem siv rau drilling | yog qhov zoo tshaj plaws rau drilling | xyaum tsis tau |
| tsis tuaj yeem tig lub raj tab sisHauv qab Hole Assembly | tuaj yeem tig ob lub raj thiab ib qho twghom hauv qab Qhov Rooj Sib Tham | tsis tuaj yeem tig cable lossis cov cuab yeej |
| hloov tau, tuaj yeem mus rau hauv kauv xauv hauv qhov dej | tawv thiab ruaj khov | tsis muaj cov txheej txheem rigidity, yuav tsum tau ceev nrooj kom tsis txhob muaj kab sib txuas |
| withstands ib co qhov sib txhuam | zoo heev tiv thaiv qhov sib txhuam | tsis zam qhov kev sib txhuam |
| Cov yeeb nkab tsis muaj zog los ntawm kev khoov loads los ntawm lub nruas, gooseneck thiab injector. Nws yuav tsum tau txiav tom qab qee lub sijhawm. | Cov kav dej muaj lub sijhawm ntev heev. Lawv tuaj yeem raug txiav, ib lub thawv xov tshiab tuaj yeem haum, thiab lawv tuaj yeem rov siv dua. | Lub cable muaj kev nyab xeeb zoo rau kev thauj khoom. Nws raug txiav / hloov thaum nws ua tiav lub neej txwv. |
Yog xav paub ntxiv, thov tsis txhob yig tiv tauj pab pawg Vigor kom paub meej ntxiv txog cov khoom lag luam.
