Deep Well Casing: Cov Lus Qhia Kom Paub Txog Siab -Lub Zog OCTG rau Ultra- Cov Roj thiab Roj Nroj Tsuag
Lub qhov dej sib sib zog nqus yog hais txog qhov siab - lub zog OCTG casing systems tshwj xeeb uas tau xaiv rau qhov sib sib zog nqus thiab ultra- cov roj thiab cov roj qhov dej, qhov twg cov hlua yuav tsum tiv taus qhov hnyav hnyav, tawg siab, axial loads, thiab hnyav downhole ib puag ncig. Tsis zoo li tus qauv ntiav- qhov dej zoo los yog PVC dej zoo yeeb nkab, cov tubular qhov tob tob yuav tsum tiv taus cov khoom hnyav heev - sab nrauv tsim tawg siab, siab sab hauv tawg siab, loj axial tensile rog, siab downhole kub, thiab nyob rau hauv ntau zaus corrosive qaub ib puag ncig uas muaj hydrogen sulfide (H₂S).
Raws li kev tshawb nrhiav thoob ntiaj teb hydrocarbon thawb mus rau hauv cov pob zeb sib sib zog nqus, qhov ntsuas qhov tob hauv qhov dej tau dhau los ua ib qho tseem ceeb tshaj plaws nyob rau hauv kev ruaj ntseg ntawm lub cev uas ua kom muaj kev ncaj ncees nyob rau hauv 20- mus txog 30-xyoo kev tsim khoom. Phau ntawv qhia no suav nrog API 5CT 11th Edition (2023) cov qauv, SPE engineering cov kev coj ua zoo tshaj plaws, thiab cov ntaub ntawv pov thawj kev ua haujlwm tau zoo los ntawm TPCO TP-V series sib sib zog nqus zoo casing deployments.
1. Core Functions ntawm Deep Well Casing
Kev sib sib zog nqus dej casing ua tiav plaub yam tsis yog - kev sib tham ntawm cov qauv thiab ib puag ncig kev ua haujlwm uas tsis muaj lwm qhov hauv qab tuaj yeem hloov tau:
- Borehole Structural Integrity- Resistant geostatic thiab tectonic overburden siab hla ntau txhiab meters ntawm pob zeb strata kom tiv thaiv qhov chaw ntub dej.
- Zonal Isolation- Thaum cemented nyob rau hauv qhov chaw, seals tawm txawv txav siab - siab formations thiab tiv thaiv tus ntoo khaub lig uncontrolled - ntws ntawm hydrocarbon them zones thiab dej qab zib aquifers.
- Siab Containment Barrier- Ua haujlwm ua qhov dej tseem ceeb- tswj kev thaiv thaum lub sij hawm drilling, cementing, ua tiav, thiab ntev - kev ua haujlwm ntau lawm.
- Load Carrier mus tas li- Txhawb nqa tag nrho qhov hnyav ntawm cov hlua khi, cov tubing ntau lawm, cov khoom ntim khoom, thiab cov khoom siv ua tiav hauv qhov dej tag nrho lub neej kev pab cuam ntawm lub qhov dej.
PVC dej zoo casing tsim nyob rau hauv ASTM F480 tsis yog tsim los rau kev sib sib zog nqus roj thiab roj daim ntaub ntawv vim hais tias nws tsis muaj peev xwm muab lub cev qhuav dej, tawg lub zog, mechanical kev cia siab rau, thiab ntev -lub sij hawm siab ntim yuav tsum tau nyob rau hauv siab - siab hydrocarbon qhov dej.
2. TP-V Series Siab-Lub Zog Sib Nqus Qhov Dej Casing: Mechanical Performance Specifications
Standard API 5CT qib xws li J55, K55, N80 thiab cov pa P110 yog tsim los rau nruab nrab- qhov tob tob. TPCO TP-V series khoom - TP110V, TP125V, TP140V, TP150V thiab TP155V - yog txhim kho proprietary siab{15}}lub zog steel qib thawj zaug qhia hauv xyoo 2003, lub hom phiaj{eep{17} kev ua haujlwm ultrabuilt nyob rau hauv Tuam Tshoj lub Tarim, Northwest, Sinopec Southwest, Xinjiang thiab Zhongyuan oilfields.
Lub ntsiab lus kom zoo dua ntawm TP-V qib dhau tus qauv P110 yog qhov yuav tsum tau ua 0℃Charpy V-notch cuam tshuam qhov yuav tsum tau ua, uas txo qhov kev pheej hmoo ntawm pob txha tawg nyob rau hauv qis- kub siab- kev ntxhov siab.
2.1 TP-V Series Deep Well Casing Mechanical Properties Table
| Qib Steel | Yield Strength Range ksi (MPa) | Yam tsawg kawg nkaus UTS ksi (MPa) | 0℃Charpy V-Txoj kev cuam tshuam lub zog (J) Transverse / Longitudinal |
|---|---|---|---|
| TP 110 V | 110 (758) – 140 (965) | 125 (862) | 40 / 60 |
| TP 125 V | 125 (862) – 155 (1068) | 135 (931) | 50 / 70 |
| TP 140 V | 140 (965) – 170 (1172) | 150 (1034) | 60 / 80 |
| TP 150 V | 150 (1034) – 180 (1241) | 160 (1103) | 60 / 80 |
| TP 155 V | 155 (1068) – 185 (1275) | 165 (1138) | 60 / 80 |
Nco tseg: Cov kev xav tau elongation rau tag nrho TP-V qib raug xam raws li tus qauv API 5CT.
2.2 Hwm Kev Sib Txuas Hom Rau Qhov Zoo Tshaj Plaws
Sib sib zog nqus thiab ultra- qhov tob tob yuav tsum muaj cov xov sib txuas uas tsim los rau tib lub sijhawm tiv thaiv kev sib tsoo, sab hauv tawm los, thiab axial nro. Peb txoj kev sib txuas tseem ceeb yog siv thoob plaws TP-V cov khoom kab:
- BC (Txoj kev sib txuas)- Siv rau loj -OD nto thiab nruab nrab casing (346.08 mm, 365.13 mm, 374.65 mm). Muab siab tensile efficiency thiab txhim khu kev qha mechanical kev ua tau zoo rau loj - txoj kab uas hla casing daim ntaub ntawv.
- TP-FJ Premium Kev Txuas- Optimized rau nruab nrab -OD ultra- sib sib zog nqus ntau lawm thiab nruab nrab casing (182.08 mm - 206.38 mm). Qhov sib npaug ntawm kev sib tsoo tsis sib haum nrog kev sib koom ua ke geometry rau nruj clearance zoo cov kev pab cuam.
- TP-CQ Siab-Compound-Load Connection- TPCO tus chij tshwj xeeb xov rau cov ntaub ntawv- teeb tsa ultra- sib sib zog nqus nruab nrab casing, teb- pov thawj hauv Tarim Oilfield KS-7 zoo. Excels nyob rau hauv ib txhij nro, vau thiab sab hauv siab loading.
3. Kev Tshawb Fawb Txog Kev Tshawb Fawb: Tarim Oilfield KS-7 Ultra-Deep Well
Ua tiav thaum Lub Peb Hlis 12, 2010, KS-7 qhov zoo sawv cev rau qhov tseem ceeb ntawm ultra- daim ntawv thov kev sib sib zog nqus hauv qhov dej hauv Suav teb rau kev sib sib zog nqus dej casing engineering thiab tau tsim tias TP140V qhov dej zoo casing tau ncav cuag lub ntiaj teb ua tus qauv OCTG.
- Casing Specification:TP140V sib sib zog nqus intermediate casing, OD 273.05 mm × WT 13.84 mm, haum nrog TP-CQ hwm kev sib txuas
- Tag Nrho qhov tob:7,087 m (ultra{2}} sib sib zog nqus)
- Cov ntaub ntawv xa mus:656 ib tus neeg casing pob qij txha, tag nrho 630 metric tons ntawm tubular qhov hnyav, khiav hauv ib qho kev ua haujlwm tas mus li
- Engineering tseem ceeb:Tsim ib daim ntawv teev npe ntiaj teb tshiab rau ib zaug - khiav kev xa tawm hnyav siab - lub zog sib sib zog nqus casing, thiab daws qhov teeb meem tseem ceeb ntawm qhov drilling thiab cementing cov nyom hauv Tarim txoj kev nyuaj siab - siab geological formations.
Txij li xyoo 2003, TP-V series qhov sib sib zog nqus qhov dej tau raug xa tawm ntawm qhov ntsuas thoob plaws txhua qhov loj hauv Suav teb cov roj av, daws ntau qhov kev sib sib zog nqus tob-cov ntsiab lus ntawm kev tsim kho zoo los ntawm kev cai tsis yog- tus qauv siab- qib siab thiab cov qauv tsim kev sib txuas.
4. Deep Well Casing String Architecture thiab Standard Size Program
Cov kev pab cuam lub qhov dej tob yog tsim los raws li cov kev pab cuam drilling, tsim kom muaj siab profile, lub hom phiaj zoo, thiab cov kev cai tswj hwm.
4.1 Plaub Lub Hom Phiaj Sib Nrauj Zoo Casing String
- Conductor Casing- 18" - 30" OD, teem ntawm 40 - 100 ft. Stabilizes unconsolidated nto av thiab muaj drilling kua rov qab.
- Nto Casing- 13⅜" – 20" OD, teem rau ntawm 300 - 2,000 ft. Yuav tsum tau los ntawm ib puag ncig cov cai kom tag nrho cais cov dej ntiav ntiav los ntawm hydrocarbon paug.
- Intermediate Casing (Primary TP-V Application)- 9⅝" – 13⅜" OD, teem ntawm 4,000 - 12,000 ft. Qhov tob tob -zoo barrier tiv thaiv qhov txawv txav siab -siab formations; TP140V thiab TP155V qib yog cov khoom siv tseem ceeb rau kev sib tsoo hnyav.
- Production Casing / Liner- 4½" – 9⅝" OD, teem rau tag nrho qhov tob. Lub tsev tsim tubing thiab ntsaws ruaj ruaj lub hom phiaj hydrocarbon them cheeb tsam kom ntev - rho tawm.
4.2 Standard Deep Well Casing Dimensional Specifications
| Nominal Loj | Outer Diameter (hauv) | Common Heavy Phab Ntsa Thickness Range (hauv) | Daim Ntawv Thov Kev Siv Dej Hauv Qhov Tseem Ceeb |
|---|---|---|---|
| 9⅝" | 9.625 | 0.312 – 0.472 | Intermediate Deep Casing (core TP-V qhov loj me) |
| 13⅜" | 13.375 | 0.380 – 0.514 | Loj -OD Deep Intermediate Casing nrog kev sib txuas BC |
| 7" | 7.000 | 0.272 – 0.408 | Deep Production Casing Strings |
| 20" | 20.000 | 0.438 – 0.635 | Deep Well Surface thiab Conductor Casing |
5. Sib sib zog nqus zoo casing khoom xaiv raws li API 5CT Requirements
5.1 Cov Cai Tsis suav Cov Khoom Siv rau Kev Pabcuam Zoo
PVC (ASTM F480) thiab fiberglass -cov yas siv dag zog (FRP) casing raug tshem tawm los ntawm qhov dej sib sib zog nqus vim qhov kub tsis txaus thiab lub zog txhua yam. Cov pa roj carbon steel OCTG yog cov khoom siv dav tshaj plaws rau cov qhov dej sib sib zog nqus, thaum CRA cov ntaub ntawv yuav raug xaiv rau qhov chaw muaj corrosive heev.
5.2 Qib Xaiv Logic los ntawm Geological Ib puag ncig
- Nruab nrab-Qhov tob tsis yog-Sour Wells (4,000 - 6,000 m)- Standard API P110 los yog TP110V sib sib zog nqus casing rau nruab nrab lub cev qhuav dej thiab tensile loads.
- Ultra-Deep High-Collapse Non-Sour Wells (6,000 m+)- TP125V, TP140V, TP150V lossis TP155V siab-lub zog TP-V series qib nrog txhim kho 0℃cuam tshuam toughness.
- Sour Deep Wells (H₂S Tam sim no)- Qib L80 feem ntau raug xaiv rau kev pabcuam qaub thaum tsim nyog raws li NACE MR0175/ISO 15156 cov cai; TPCO muab cov khoom siv sib xws TP-SS qaub- pabcuam siab- lub zog sib sib zog nqus casing variants los tiv thaiv kev puas tsuaj rau sulfide stress cracking (SSC).
- Geothermal Deep Wells (BHST> 140℃F)- Tag nrho -steel TP-V casing yuav tsum tau; Cov ntaub ntawv PVC raug txwv vim yog thermal deformation mus tas li thiab lub zog degradation.
Critical engineering ceeb toom:Kev siv qis- qib qis zog xws li J55 lossis N80 nyob rau hauv qhov sib sib zog nqus qaub ib puag ncig yuav ua rau muaj kev pheej hmoo ntawm sulfide kev nyuaj siab tawg thiab ua tsis tiav thaum ntxov yog tias xaiv tsis raug rau qhov chaw qaub.
6. Standard Deep Well Casing Installation Workflow (Hom Deep Well Casing Installation Workflow)
Kev khiav dej num kom raug thiab kev sib tsoo ncaj qha txiav txim siab 30+ xyoo ntawm kev ua haujlwm sib sib zog nqus. Cov txheej txheem rau - cov txheej txheem txheej txheem siv rau tag nrho TP-V qhov sib sib zog nqus dej casing installations:
- Precision Drilling- Laum lub borehole 2 - 4 ntiv tes loj dua li lub casing OD los tsim kom muaj ib lub voj voog sib txawv rau cov cement slurry.
- Casing khiav- Kev sib koom ua ke-los ntawm- kev sib koom ua ke tubular xa tawm, nrog txhua tus hwm TP-FJ / TP-CQ / BC kev sib txuas ua rau cov chaw tsim khoom- qhia txog tus nqi torque.
- Centralizer qhov chaw- Qhov sib npaug sib npaug ntawm qhov nruab nrab ntawm qhov ntev ntev tiv thaiv phab ntsa. Kev tsis zoo hauv nruab nrab tsim micro-annulus fluid migration channels, lub hauv paus ua rau muaj kev ruaj ntseg casing siab (SCP).
- Cement Circulation- Cement slurry yog pumped rau hauv lub casing ID, ntws mus rau hauv lub casing khau, thiab puv tag nrho cov annulus qab tubular.
- Tos rau Cement (WOC)- Yam tsawg kawg nkaus 12 - 24 teev kho lub sijhawm uas tsis muaj qhov kev ua haujlwm hauv qab yuav tsum tau lav tag nrho kev tsim-rau-casing daim ntawv cog lus ncaj ncees.
- Kev Ntsuas Siab Siab- Lub casing bore yog pressurized los tsim tsim siab ntsuam xyuas kom pom cov cement micro- leaks los yog sib foob foob ua ntej drilling rov pib dua.
Casing Pipe Certificate
Hu rau peb cov kws tshaj lij OCTG rau tus nqi, kev txhawb nqa, thiab xa khoom sai.
7. FAQ
Q1: Dab tsi qhov tob yog qhov zoo cais raws li "sib sib zog nqus" rau lub hom phiaj tsim qauv?
Hauv kev ua lag luam dav dav, qhov dej tob dua 4,000 meters tau muab cais ua qhov dej tob, thiab qhov dej siab tshaj 7,000 meters raug cais raws li ultra- tob. Standard J55 thiab K55 casing tsis yog tsim los rau cov kev pab cuam txhim khu kev qha hauv qab 4,000 meters, yuav tsum tau TP-V siab- lub zog tob tob casing qib hloov.
Q2: Vim li cas TP-V sib sib zog nqus casing yuav tsum tau yuav tsum tau 0℃Charpy cuam tshuam kuaj thaum tus qauv P110 tsis?
Ultra- cov dej tob tob uas muaj peev xwm ua ke rau kev sib xyaw ua ke siab tensile kev nyuaj siab thiab qis subsurface kub. Standard P110 PSL1 tsis tas yuav tsum muaj tib yam ntxiv cuam tshuam rau kev txheeb xyuas qhov zoo ib yam li qee qhov kev sib sib zog nqus- qib zoo. Txoj cai 0℃Charpy V-notch yam tsawg kawg nkaus ntawm lub zog yuav tsum tau muaj rau TP-V series lav txaus ductility thiab pob txha toughness los tiv thaiv tam sim tubular rupture nyob rau hauv hnyav tob-zoo ib puag ncig.
Q3: PVC casing puas tuaj yeem siv rau qhov chaw ntiav ntawm cov roj sib sib zog nqus lossis roj qhov dej?
Tsis yog. Txawm hais tias qhov chaw ntawm qhov dej sib sib zog nqus hydrocarbon ntsib qhov kub thiab txias tshaj li ntawm 140℃F thermal txwv ntawm PVC, nrog rau cov tshuaj hydrocarbon uas degrade polymer qauv. Steel OCTG tseem yog thawj qhov kev xaiv rau cov pa sib sib zog nqus roj thiab cov qhov dej.
Q4: Qhov kev sib txuas hwm zoo twg pom zoo rau 7,000 m + ultra- sib sib zog nqus nruab nrab casing?
TP-CQ proprietary high-compound-load hwm kev sib txuas yog qhov kev xaiv zoo tshaj plaws, siv tau ntawm 7,087 m KS-7 Tarim ultra- tob tob. Nws cov xov geometry ib txhij tiv taus huab cua tawg siab, axial nro, thiab sab hauv tawg siab muab kev txhim kho ua ke -load kev ua tau zoo piv nrog cov pa sib txuas API hauv kev thov cov ntawv thov ultra-dav.
Q5: Yuav ua li cas tsis ua hauj lwm hom tshwm sim yog hais tias qhov tob tob casing yog ntsia tsis muaj centralizers?
Lub casing nyob rau ntawm ib sab ntawm phab ntsa borehole, tawm hauv cov cement tsis tiav thiab nqaim micro-annulus channels raws tubular sab nrauv. Cov kev khiav dej num mus tas li no ua rau muaj kev kub ntxhov siab (SCP), ua kom hla - sib kis ntawm thaj chaw geological, thiab tuaj yeem ua rau muaj kev tso tseg tag nrho nrog cov nqi kho mob tshaj li pob nyiaj siv rau kev khawb qhov dej tshiab.
Q6: Puas yog TP-V cov qib sib sib zog nqus zoo ua tau raws li API 5CT cov qauv thoob ntiaj teb?
TP-V qib yog cov qib kev txhim kho uas tsim tawm tshaj li API 5CT cov kev faib tawm, thaum tswj kev sib raug zoo nrog API qhov ntev thiab kev tsim khoom.
Q7: Dab tsi yog qhov txawv ntawm qhov sib sib zog nqus qhov dej thiab cov tubing ntau lawm?
Qhov sib sib zog nqus qhov casing yog cemented mus tas li rau lub borehole tsim thiab tsis tuaj yeem rov qab los yog hloov. Cov tubing ntau lawm yog ib qho me me - txoj kab uas hla tshem tau cov yeeb nkab hlua dai rau hauv lub casing lub puab txoj kab uas hla mus thauj cov roj thiab roj rau saum npoo. Tubing tuaj yeem rub thiab hloov thaum lub sijhawm ua haujlwm ua haujlwm yam tsis muaj kev cuam tshuam rau qhov sib sib zog nqus casing barrier qauv.
Q8: Dab tsi ntawm qhov sib sib zog nqus qhov casing yuav tsum muaj rau kev tsim muaj hydrogen sulfide (kev pabcuam qaub)?
L80 qib steel ua raws li NACE MR0175 / ISO 15156 yog tus qauv yam tsawg kawg nkaus rau cov dej tob tob kom tiv thaiv sulfide kev nyuaj siab tawg (SSC). Rau ultra- qhov dej sib sib zog nqus uas xav tau lub zog siab dua li tus qauv L80, TPCO tsim cov khoom sib xws TP-SS qaub- pabcuam siab- lub zog sib sib zog nqus casing variants engineered rau kev sib xyaw ua haujlwm siab thiab H₂S raug.