OCTG TubesFeem ntau yog siv rau drilling roj thiab roj qhov dej thiab thauj cov roj thiab roj.Nws suav nrog cov kav roj laum, cov roj casings, thiab cov roj rho cov kav dej.OCTG TubesFeem ntau yog siv los txuas cov laum dab tshos thiab laum cov khoom thiab xa lub zog drilling.Petroleum casing feem ntau yog siv los txhawb lub qhov dej thaum lub sijhawm drilling thiab tom qab ua tiav, kom ntseeg tau tias kev ua haujlwm zoo ntawm tag nrho cov roj zoo thaum lub sijhawm drilling thiab tom qab ua tiav.Cov roj thiab roj nyob hauv qab ntawm lub qhov dej yog tsuas yog thauj mus rau qhov chaw los ntawm cov roj twj tso kua mis.
Roj casing yog lub neej txoj sia rau kev tswj xyuas cov roj qhov dej.Vim muaj qhov sib txawv ntawm cov geological, qhov kev ntxhov siab hauv av yog qhov nyuaj, thiab kev sib xyaw ua ke ntawm kev nro, compression, dabtsi yog khoov, thiab torsion kev ntxhov siab ntawm lub cev lub cev ua rau muaj kev xav tau siab rau qhov zoo ntawm lub casing nws tus kheej.Thaum lub casing nws tus kheej puas vim qee yam, nws yuav ua rau txo qis hauv kev tsim khoom lossis txawm tias khawb tag nrho qhov dej.
Raws li lub zog ntawm cov hlau nws tus kheej, lub casing tuaj yeem muab faib ua cov qib steel sib txawv, xws li J55, K55, N80, L80, C90, T95, P110, Q125, V150, thiab lwm yam. Cov qib steel siv nws txawv nyob ntawm qhov zoo. thiab qhov tob.Nyob rau hauv ib puag ncig corrosive, nws tseem yuav tsum tau hais tias lub casing nws tus kheej muaj corrosion kuj.Nyob rau hauv cov cheeb tsam uas nyuaj geological tej yam kev mob, nws tseem yuav tsum tau hais tias lub casing muaj kev tiv thaiv lub cev qhuav dej.
I.Qhov kev paub txog OCTG Yeeb Nkab
1 、 Cov ntsiab lus tshwj xeeb ntsig txog kev piav qhia txog roj av
API: nws yog lub npe luv ntawm American Petroleum Institute.
OCTG: Nws yog lub npe luv ntawm Roj Lub Tebchaws Tubular Khoom, uas txhais tau hais tias cov roj tshwj xeeb tubing, suav nrog cov roj ua tiav, cov yeeb nkab laum, laum dab tshos, hoops, luv pob qij txha thiab lwm yam.
Roj Tubing: Tubing siv nyob rau hauv cov roj qhov dej rau roj extraction, gas extraction, dej txhaj thiab acid fracturing.
Casing: Tubing uas yog txo los ntawm qhov chaw ntawm lub ntiaj teb mus rau hauv ib tug drilled borehole raws li ib tug liner los tiv thaiv lub cev qhuav dej ntawm phab ntsa.
Drill yeeb nkab: Cov yeeb nkab siv rau drilling boreholes.
Kab yeeb nkab: Cov yeeb nkab siv los thauj cov roj lossis roj.
Circlips: Lub tog raj kheej siv los txuas ob txoj hlua txuas nrog cov xov sab hauv.
Coupling khoom: Cov yeeb nkab siv rau kev tsim cov couplings.
API Threads: Cov yeeb nkab xov tau teev tseg los ntawm API 5B tus qauv, suav nrog cov roj yeeb nkab puag ncig xov, casing luv round threads, casing ntev round threads, casing offset trapezoidal threads, kab yeeb nkab threads thiab hais txog.
Tshwj xeeb Buckle: Tsis-API threads nrog tshwj xeeb sealing zog, kev sib txuas khoom thiab lwm yam khoom.
Ua tsis tiav: deformation, tawg, nto puas thiab poob ntawm thawj qhov kev ua haujlwm raws li cov kev pabcuam tshwj xeeb.Cov ntaub ntawv tseem ceeb ntawm cov roj casing tsis ua haujlwm yog: extrusion, slippage, rupture, to, corrosion, bonding, hnav thiab lwm yam.
2, Petroleum hais txog cov qauv
API 5CT: Casing thiab Tubing Specification (tam sim no qhov tseeb version ntawm 8th tsab)
API 5D: Laum yeeb nkab specification (qhov tseeb version ntawm 5th tsab)
API 5L: pipeline steel yeeb nkab specification (qhov tseeb version ntawm 44th tsab)
API 5B: Specification rau machining, ntsuas thiab tshuaj xyuas cov casing, roj yeeb nkab thiab kab yeeb nkab threads
GB / T 9711.1-1997: Cov txheej txheem rau kev xa cov yeeb nkab steel rau kev thauj mus los ntawm kev lag luam roj thiab roj Part 1: Qib A steel kav
GB / T9711.2-1999: Cov txheej txheem ntawm kev xa cov yeeb nkab steel rau kev thauj mus los ntawm kev lag luam roj thiab roj Part 2: Qib B steel kav
GB/T9711.3-2005: Technical Conditions of Delivery of Steel Pipes for the Transportation of Petroleum and Natural Gas Industry Part 3: Qib C steel yeeb nkab
Ⅱ.Roj kav
1. Kev faib tawm ntawm cov kav dej roj
Cov kav roj tau muab faib ua Non-Upset (NU) tubing, Sab Nraud Upset (EU) tubing, thiab ib qho sib koom ua ke tubing.Non-Upset tubing yog hais txog cov yeeb nkab kawg uas yog threaded tsis thickening thiab nruab nrog ib tug coupling.External Upset tubing yog hais txog ob lub yeeb nkab kawg uas tau ua los ntawm sab nraud, ces threaded thiab haum nrog clamps.Kev sib koom ua ke tubing yog hais txog cov yeeb nkab uas txuas ncaj qha yam tsis muaj kev sib txuas, nrog ib qho kawg threaded los ntawm cov xov sab hauv thickened sab nraud thiab lwm qhov kawg threaded los ntawm cov xov sab nraud thickened.
2.Lub luag hauj lwm ntawm tubing
①, tshem tawm cov roj thiab roj: tom qab cov roj thiab roj qhov dej tau drilled thiab cemented, cov tubing tau muab tso rau hauv cov roj casing kom rho tawm cov roj thiab roj rau hauv av.
②, dej txhaj tshuaj: thaum lub downhole siab tsis txaus, txhaj dej rau hauv lub qhov dej los ntawm lub raj.
③, Chav txhaj tshuaj: Nyob rau hauv cov txheej txheem ntawm thermal rov qab ntawm cov roj tuab, chav yuav tsum tau nkag mus rau lub qhov dej nrog cov kav dej insulated.
(iv) Acidizing thiab fracturing: Nyob rau hauv lub lig theem ntawm zoo drilling los yog nyob rau hauv thiaj li yuav txhim kho cov zus tau tej cov roj thiab roj qhov, nws yog tsim nyog los input acidizing thiab fracturing nruab nrab los yog curing khoom rau cov roj thiab roj txheej, thiab nruab nrab thiab curing khoom yog thauj los ntawm cov roj yeeb nkab.
3.Steel qib ntawm cov roj yeeb nkab
Cov qib steel ntawm cov roj yeeb nkab yog: H40, J55, N80, L80, C90, T95, P110.
N80 tau muab faib ua N80-1 thiab N80Q, ob qho tib si tensile zog ntawm tib yam, ob qhov sib txawv yog qhov kev xa khoom thiab kev cuam tshuam qhov sib txawv, N80-1 tus me nyuam los ntawm lub xeev normalized lossis thaum kawg dov kub siab tshaj qhov Qhov ntsuas kub tseem ceeb Ar3 thiab txo qhov nro tom qab cua txias, thiab tuaj yeem siv los nrhiav lwm txoj hauv kev rau normalizing kub-dov, cuam tshuam thiab tsis muaj kev puas tsuaj tsis tas yuav tsum kuaj;N80Q yuav tsum tau tempered (quenching thiab tempering) Thaum tshav kub kub kev kho mob, cuam tshuam kev ua hauj lwm yuav tsum tau raws li cov kev cai ntawm API 5CT, thiab yuav tsum tsis yog-tshuaj ntsuam xyuas.
L80 muab faib ua L80-1, L80-9Cr thiab L80-13Cr.Lawv cov khoom siv tshuab thiab khoom xa tuaj yog tib yam.Qhov sib txawv ntawm kev siv, kev tsim khoom nyuaj thiab tus nqi, L80-1 rau hom dav dav, L80- 9Cr thiab L80-13Cr yog siab corrosion resistance tubing, ntau lawm nyuaj, kim, feem ntau yog siv rau hnyav corrosion qhov dej.
C90 thiab T95 muab faib ua hom 1 thiab hom 2, uas yog, C90-1, C90-2 thiab T95-1, T95-2.
4.Kev siv steel qib, qib thiab kev xa khoom ntawm cov roj yeeb nkab
Steel qib qib Delivery status
J55 roj yeeb nkab 37Mn5 ca roj yeeb nkab: kub dov es tsis txhob normalized
Thickened roj yeeb nkab: puv-ntev normalized tom qab thickening.
N80-1 tubing 36Mn2V Flat-type tubing: kub dov es tsis txhob normalized
Thickened roj yeeb nkab: puv-ntev normalized tom qab thickening
N80-Q roj yeeb nkab 30Mn5 puv-ntev tempering
L80-1 roj yeeb nkab 30Mn5 puv-ntev tempering
P110 roj yeeb nkab 25CrMnMo puv-ntev tempering
J55 coupling 37Mn5 kub dov on-line normalization
N80 coupling 28MnTiB puv-ntev tempering
L80-1 coupling 28MnTiB puv-ntev tempering
P110 Clamps 25CrMnMo Tag Nrho Tempered
Ⅲ.Casing
1.Categorization thiab lub luag hauj lwm ntawm casing
Casing yog cov yeeb nkab steel uas txhawb nqa phab ntsa ntawm cov roj thiab cov qhov dej.Ob peb txheej ntawm casing yog siv nyob rau hauv txhua lub qhov dej raws li qhov sib txawv drilling qhov tob thiab geological tej yam kev mob.Cement yog siv los cement lub casing tom qab nws txo qis rau hauv lub qhov dej, thiab tsis zoo li cov yeeb nkab roj thiab cov yeeb nkab tho, nws tsis tuaj yeem rov siv dua thiab yog cov khoom siv pov tseg.Yog li ntawd, kev noj cov casing account rau ntau tshaj 70% ntawm tag nrho cov roj zoo tubing.Casing tuaj yeem muab faib ua: conduit, nto casing, technical casing thiab roj casing raws li nws siv, thiab lawv cov qauv hauv cov roj qhov dej yog qhia hauv daim duab hauv qab no.
2.Conductor casing
Feem ntau yog siv rau drilling hauv dej hiav txwv thiab suab puam kom cais cov dej hiav txwv thiab cov xuab zeb kom ntseeg tau tias qhov kev vam meej ntawm qhov drilling, cov ntsiab lus tseem ceeb ntawm txheej txheej ntawm 2.casing yog: Φ762mm (30in) × 25.4mm, Φ762mm (30in) × 19.06mm.
Nto casing: Nws yog tsuas yog siv rau thawj drilling, drilling qhib qhov chaw ntawm lub xoob strata mus rau lub bedrock, nyob rau hauv thiaj li yuav kaw ib feem ntawm lub strata los ntawm collapsing, nws yuav tsum tau muab ntim nrog lub nto casing.Lub ntsiab specifications ntawm nto casing: 508mm (20in), 406.4mm (16in), 339.73mm (13-3/8in), 273.05mm (10-3/4in), 244.48mm (9-5/9in), thiab lwm yam. Qhov tob ntawm cov yeeb nkab qis yog nyob ntawm qhov tob ntawm qhov muag muag.Qhov tob ntawm cov yeeb nkab qis yog nyob ntawm qhov tob ntawm qhov xoob stratum, uas feem ntau yog 80 ~ 1500 m.Nws sab nraud thiab sab hauv siab tsis loj, thiab nws feem ntau siv K55 steel qib lossis N80 steel qib.
3.Technical casing
Technical casing yog siv nyob rau hauv cov txheej txheem drilling ntawm complex formations.Thaum ntsib cov txheej txheem nyuaj xws li txheej txheej tawg, roj txheej, txheej roj, txheej dej, txheej txheej txheej, txheej txheej ntsev, thiab lwm yam, nws yog ib qho tsim nyog yuav tsum muab tso rau hauv cov txheej txheem txheej txheem los kaw nws, txwv tsis pub qhov drilling tsis tuaj yeem nqa tawm.Qee qhov dej sib sib zog nqus thiab nyuaj, thiab qhov tob ntawm lub qhov dej nce mus txog ntau txhiab meters, qhov zoo ntawm qhov tob no yuav tsum tau muab tso rau hauv ob peb txheej txheej txheej txheej, nws cov khoom siv kho tshuab thiab sealing kev ua tau zoo yog siab heev, kev siv cov qib steel yog. kuj siab dua, ntxiv rau K55, ntau dua yog kev siv qib N80 thiab P110, qee qhov dej tob kuj tseem siv hauv Q125 lossis ntau dua qib tsis-API, xws li V150.Cov ntsiab lus tseem ceeb ntawm cov txheej txheem txheej txheem yog: 339.73 Cov ntsiab lus tseem ceeb ntawm cov txheej txheem yog raws li hauv qab no: 339.73mm (13-3/8in), 273.05mm (10-3/4in), 244.48mm (9-5/8in), 219.08mm (8-5/8in), 193.68mm (7-5/8in), 177.8mm (7in) thiab lwm yam.
4. Roj casing
Thaum lub qhov dej tau drilled mus rau qhov chaw nyob (txheej txheej uas muaj roj thiab roj), nws yuav tsum tau siv cov roj casing los kaw cov roj thiab roj txheej thiab cov txheej sab saud, thiab sab hauv ntawm cov roj casing yog cov roj txheej. .Roj casing nyob rau hauv tag nrho cov hom ntawm casing nyob rau hauv lub qhov tob qhov tob, nws mechanical zog thiab sealing kev ua tau zoo yuav tsum yog siab tshaj, siv steel qib K55, N80, P110, Q125, V150 thiab hais txog.Lub ntsiab specifications ntawm tsim casing yog: 177.8mm (7in), 168.28mm (6-5/8in), 139.7mm (5-1/2in), 127mm (5in), 114.3mm (4-1/2in), thiab lwm yam . Lub casing yog qhov tob tshaj plaws ntawm txhua yam ntawm qhov dej, thiab nws cov kev ua haujlwm zoo thiab kev sib khi yog qhov siab tshaj plaws.
V. Drill tub
1, Kev faib tawm thiab lub luag haujlwm ntawm cov yeeb nkab rau cov cuab yeej drilling
Lub square laum yeeb nkab, laum yeeb nkab, qhov hnyav laum yeeb nkab thiab laum dab tshos hauv cov cuab yeej drilling tsim cov yeeb nkab laum.Lub laum yeeb nkab yog lub hauv paus drilling cuab yeej uas tsav lub laum me ntsis los ntawm hauv av mus rau hauv qab ntawm lub qhov dej, thiab nws kuj yog ib tug channel ntawm hauv av mus rau hauv qab ntawm lub qhov dej.Nws muaj peb lub luag haujlwm tseem ceeb: ① hloov torque los tsav lub laum me ntsis rau kev xyaum;② tso siab rau nws tus kheej qhov hnyav los ua kom lub zog ntawm lub laum me ntsis kom tawg lub pob zeb hauv qab ntawm qhov dej;③ conveying cov dej ntxuav dej, uas yog, drilling av nkos los ntawm cov av nkos twj tso kua mis siab, mus rau hauv lub borehole ntawm lub drilling kem kom ntws mus rau hauv qab ntawm lub qhov dej los ntxuav cov pob zeb khib nyiab thiab txias lub laum me ntsis, thiab nqa cov pob zeb khib nyiab los ntawm qhov chaw annular nruab nrab ntawm sab nrauv ntawm kem thiab phab ntsa ntawm lub qhov dej kom rov qab mus rau hauv av, thiaj li ua tiav lub hom phiaj ntawm drilling qhov dej.Drilling yeeb nkab nyob rau hauv cov txheej txheem drilling kom tiv taus ntau yam kev hloov pauv, xws li tensile, compression, torsion, dabtsi yog khoov thiab lwm yam kev ntxhov siab, lub puab nto kuj raug rau cov av nkos siab thiab corrosion.
(1) square drill yeeb nkab: square laum yeeb nkab muaj ob hom quadrilateral hom thiab hexagonal hom, Tuam Tshoj cov roj drilling pas nrig txhua txheej laum kem feem ntau yog siv quadrilateral hom laum yeeb nkab.Nws specifications yog: 63.5mm (2-1/2in), 88.9mm (3-1/2in), 107.95mm (4-1/4in), 133.35mm (5-1/4in), 152.4mm (6in) thiab yog li ntawd.Feem ntau siv ntev yog 12 ~ 14.5m.
(2) Drilling yeeb nkab: Drilling yeeb nkab yog cov cuab yeej tseem ceeb rau cov qhov dej drilling, txuas nrog rau qhov qis kawg ntawm cov yeeb nkab square, thiab thaum lub qhov dej drilling txuas ntxiv mus rau qhov tob, cov yeeb nkab laum ua kom ntev ntawm cov kab laum ib nrab.Qhov tshwj xeeb ntawm laum yeeb nkab yog: 60.3mm (2-3/8in), 73.03mm (2-7/8in), 88.9mm (3-1/2in), 114.3mm (4-1/2in), 127mm (5in) ), 139.7mm (5-1/2in) thiab lwm yam.
(3) Weighted Drill Pipe: Weighted laum yeeb nkab yog cov cuab yeej hloov pauv txuas txuas cov laum yeeb nkab thiab laum dab tshos, uas tuaj yeem txhim kho qhov kev quab yuam ntawm cov yeeb nkab laum nrog rau kev ua kom lub siab ntawm laum ntsis.Cov ntsiab lus tseem ceeb ntawm qhov hnyav laum yeeb nkab yog 88.9mm (3-1 / 2in) thiab 127mm (5in).
(4) Laum dab tshos: lub dab tshos laum txuas nrog rau sab qis ntawm cov yeeb nkab laum, uas yog tshwj xeeb tuab-walled yeeb nkab uas muaj siab rigidity, exerting siab rau lub laum me ntsis kom tawg lub pob zeb, thiab muaj peev xwm ua si lub luag hauj lwm thaum lub sij hawm. drilling cov qhov dej ncaj.Cov kev qhia tshwj xeeb ntawm lub tsho laum yog: 158.75mm (6-1/4in), 177.85mm (7in), 203.2mm (8in), 228.6mm (9in) thiab lwm yam.
V. Kab
1 、 Kev faib tawm ntawm kab yeeb nkab
Kab yeeb nkab yog siv nyob rau hauv cov roj thiab roj kev lag luam rau kev thauj mus los ntawm cov roj, refined roj, natural gas thiab dej pipelines nrog steel yeeb nkab rau luv luv.Kev thauj mus los ntawm cov roj thiab cov kav xa hluav taws xob feem ntau yog muab faib ua cov kav dej loj, cov kav dej hauv nroog thiab cov kav dej hauv nroog hauv nroog peb hom, cov kav dej loj loj ntawm cov lus qhia ib txwm muaj rau ∮ 406 ~ 1219mm, phab ntsa thickness ntawm 10 ~ 25mm, steel qib X42 ~ X80;ceg kav dej thiab cov kav dej hauv nroog cov kav dej ntawm cov kav dej ib txwm muaj rau # 114 ~ 700mm, phab ntsa thickness ntawm 6 ~ 20mm, steel qib X42 ~ X80.Cov lus qhia ib txwm muaj rau cov raj xa dej thiab cov kav dej hauv nroog yog 114-700mm, phab ntsa thickness 6-20mm, steel qib X42-X80.
Kab yeeb nkab tau welded steel yeeb nkab, kuj muaj seamless steel yeeb nkab, welded steel yeeb nkab yog siv ntau tshaj seamless steel yeeb nkab.
2, Kab yeeb nkab txheem
Kab yeeb nkab txheem yog API 5L "pipeline steel yeeb nkab specification", tab sis Tuam Tshoj xyoo 1997 tshaj tawm ob lub teb chaws cov qauv rau cov kav dej: GB / T9711.1-1997 "kev lag luam roj thiab roj, thawj feem ntawm cov txheej txheem ntawm kev xa cov yeeb nkab steel. : A-qib steel yeeb nkab" thiab GB / T9711.2-1997 "kev lag luam roj thiab roj, qhov thib ob ntawm cov txheej txheem ntawm kev xa cov yeeb nkab steel: B-qib steel yeeb nkab".Cov yeeb nkab steel", ob tus qauv no sib npaug rau API 5L, ntau tus neeg siv hauv tsev xav tau cov khoom siv ntawm ob lub tebchaws no.
3, Hais txog PSL1 thiab PSL2
PSL yog lub npe luv ntawm cov khoom specification qib.Kab yeeb nkab cov khoom specification theem tau muab faib ua PSL1 thiab PSL2, kuj tuaj yeem hais tias qib zoo tau muab faib ua PSL1 thiab PSL2.PSL1 yog siab tshaj PSL2, 2 specification qib tsis tsuas yog ib qho kev xeem sib txawv, thiab cov tshuaj muaj pes tsawg leeg, mechanical zog yuav tsum sib txawv, yog li raws li API 5L kev txiav txim, cov nqe lus ntawm daim ntawv cog lus ntxiv rau qhia cov specifications, steel qib. thiab lwm yam kev ntsuas, tab sis kuj yuav tsum qhia cov khoom Specification qib, uas yog, PSL1 lossis PSL2.
PSL2 nyob rau hauv cov tshuaj muaj pes tsawg leeg, tensile zog, cuam tshuam lub zog, tsis-destructive kuaj thiab lwm yam ntsuas yog nruj dua PSL1.
4 、 Pipeline yeeb nkab steel qib thiab tshuaj lom neeg muaj pes tsawg leeg
Kab yeeb nkab steel qib ntawm qis mus rau siab yog muab faib ua: A25, A, B, X42, X46, X52, X60, X65, X70 thiab X80.
5, kab yeeb nkab dej siab thiab tsis muaj kev puas tsuaj
Cov kab yeeb nkab yuav tsum tau ua tiav los ntawm ceg hydraulic test, thiab tus qauv tsis tso cai rau tsis muaj kev puas tsuaj ntawm hydraulic siab, uas kuj yog qhov sib txawv loj ntawm API tus qauv thiab peb cov qauv.
PSL1 tsis tas yuav muaj kev sim tsis muaj kev puas tsuaj, PSL2 yuav tsum tsis muaj kev puas tsuaj los ntawm ceg.
VI.Premium Connection
1 、 Taw qhia txog kev sib txuas hwm
Tshwj xeeb buckle txawv ntawm API xov nrog cov qauv tshwj xeeb ntawm cov yeeb nkab xov.Txawm hais tias API threaded roj casing uas twb muaj lawm yog dav siv nyob rau hauv roj zoo exploitation, nws shortcomings yog qhia meej meej nyob rau hauv tshwj xeeb ib puag ncig ntawm ib co roj teb: API round threaded yeeb nkab kem, txawm hais tias nws sealing kev ua tau zoo dua, lub tensile quab yuam los ntawm threaded. ib feem tsuas yog sib npaug ntawm 60% mus rau 80% ntawm lub zog ntawm cov yeeb nkab lub cev, yog li nws tsis tuaj yeem siv rau hauv kev siv cov dej sib sib zog nqus;API biased trapezoidal threaded yeeb nkab kem, tensile kev ua tau zoo ntawm threaded ib feem tsuas yog sib npaug rau lub zog ntawm cov yeeb nkab lub cev, yog li nws tsis tuaj yeem siv rau hauv qhov tob tob;API biased trapezoidal threaded yeeb nkab kab, nws tensile kev ua tau zoo tsis zoo.Txawm hais tias qhov tensile kev ua tau zoo ntawm kem yog siab dua li ntawm API puag ncig xov txuas, nws qhov kev sib khi tsis zoo heev, yog li nws tsis tuaj yeem siv rau hauv kev siv cov roj qhov dej siab;Tsis tas li ntawd, cov roj threaded tsuas tuaj yeem ua nws lub luag haujlwm hauv ib puag ncig nrog qhov kub thiab txias hauv qab 95 ℃, yog li nws tsis tuaj yeem siv rau hauv kev siv cov dej kub kub.
Piv nrog API puag ncig xov thiab ib feem trapezoidal xov txuas, Kev Sib Txuas Zoo Tshaj Plaws tau ua tiav qhov kev vam meej hauv cov hauv qab no:
(1) zoo sealing, los ntawm kev tsim ntawm elastic thiab hlau sealing qauv, thiaj li hais tias lub sib koom ua ke roj sealing kuj mus txog qhov txwv ntawm lub tubing lub cev nyob rau hauv lub yield siab;
(2) lub zog siab ntawm kev sib txuas, nrog kev sib txuas hwm kev sib txuas ntawm cov roj casing, lub zog ntawm kev sib txuas mus txog los yog tshaj lub zog ntawm lub cev tubing, los daws qhov teeb meem ntawm slippage fundamentally;
(3) los ntawm kev xaiv cov khoom siv thiab cov txheej txheem kho qhov chaw txhim kho, pib daws qhov teeb meem ntawm cov xov buckle;
(4) los ntawm kev ua kom zoo ntawm cov qauv, kom qhov sib koom ua ke ntawm kev ntxhov siab yog qhov tsim nyog, zoo dua rau kev tiv thaiv kev ntxhov siab corrosion;
(5) los ntawm lub xub pwg nyom ntawm tus tsim tsim nyog, yog li ntawd nyob rau hauv lub buckle lub lag luam yog yooj yim mus nqa tawm.
Tam sim no, lub ntiaj teb no tau tsim ntau tshaj 100 hom kev sib txuas hwm nrog cov cuab yeej patented.
Post lub sij hawm: Feb-21-2024