PETROVIETNAM GIAI PHAP CONG NGHE N A N G CAO THU HOI DAU CAC MO NGOAl KHOI ThS TrUomg Dure Trpng, TS Hoang Thjnh Nhan Dai hoc Ddu khi Viet Nam T6m t i t Hogt ddng thdm dd, khai thdc ddu khitrin biin b[.]
PETROVIETNAM GIAI PHAP CONG NGHE N A N G CAO THU HOI DAU CAC MO NGOAl KHOI ThS TrUomg Dure Trpng, TS Hoang Thjnh Nhan Dai hoc Ddu Viet Nam T6m t i t Hogt ddng thdm dd, khai thdc ddu khitrin biin b6t ddu phdt triin tCf nhCfng ndm 1950 vd ngdy cdng trdnin sd ddng vdi sUtham gia mgnh mi cua cdc cdng ty ddu hdng ddu thi gidi Tinh din ndm 2010, trUIUdng cdc vung k thdc ddu md ngodi khai dgt khodng 650 ty thung ddu quy doi (Cboe), chiim 20% tong trUIUdng ddu md dd dUdc xd minh 11} Tuy nhiin, thdm dd, khai thdc ddu khitrin biin doi hdi cdng nghi rdtphdc tgp, dd qud trinh khai thd dUa ddu lin hi thdng xCtly vd phdn tdch chiu dnh hUdng bdi nhiiu yiu tdnhU: dp sau mUc nUdc biin, tinh chdt cua chdt (dd nhdt, ty trpng, thdnh phdn tgp chdt) vd cua via chUa (nhiet dd, dp sudt ) Bdi bdo ndy gidi thieu cdng n hdt vd xCfly ngdm (Subsea Boosting and Processing - SBP), mdt hUdng di mdi dang dUdc nghien cUu vd phdt triin dung dindng cao hieu qud khai thdc, qua dd giup ndng cao hi sd thu hdi ddu tgi cdc md ngodi khdi, ddc biet ddi v cdc md ddu cd t^ trpng ddu cao vd/hodc dp sudt via thdp Gidi thiiu cdng nghe SBP SBP l i t6 hpp cdng nghi phin tich hdn hpp dau khi, bom da pha v i nen khf tren be mat day bien Ddng sin phim sau qua h$ thdng SBP dupc dua len gian thu gom xil ly trung t i m (host platform) hoic cd the dua thing true tiip v i bd thdng qua h§ thdng dudng ong Oiy l i mdt cdng nghe mdi, da v i dang dupe i p dung cho mdt sd du i n Idn tren t h i gidi, nhu md Marlim (Brazil) cua Petrobras, md Tordis (Na Uy) cua Statoil, md Pazflor (Angola) cua Total, md Perdido (vinh Mexico) cua Shell Mdt sd t§n tudi Idn cac nhi cung cap cdng nghe SBP phii k i din FMC Technologies, Cameron, ABB Veteo Gray, Aker Kvaener Subsea, Schlumberger va Baker Hughes Uu diim rd r&t nhit sCf dung cdng nghe SBP la giim chi phf mua thiet bj xCf ly va nen tren he thdng xCr ly n6i, ting h$ sd thu hdi dau, ting sin lupng khai thac [5] X6t trin khia canh thu hdi dau ting cUdng (improved oil recovery - lOR), SBP l i mdt nhUng phuong phap day triin vpng tuong lai v i theo dinh gia cua Tap ehf Offshore Technology, den nim 2015, nganh cdng nghiep subsea se cd gii trj 43,4 ty USD dd SBP la cdng nghe triin vpng diy tiim ning nhit [6] Cdng ngh^ SBP gom nhdm thiet bj chfnh: Bom ting i p ngim (subsea pumping units - SPU), thiet bi xCf ly ngim (subsea separation units - SSU) v i thiet bi nen ngim (subsea compression units - SCU) Trong dd, SCU c6n dang giai doan phit trien phdi thai va hien chila cd du i n nio tren t h i gidi i p dung phuong phip niy Tuy nhi^n, ke hoach phit triin SCU van dang dupe trien khai, vdi dU i n thf diem tai md Ormen Lange (Bien Bic) cua Statoil vdi hy vpng khf se dupe nen tai day bien va di'y true tiep vio bd cich dd 120km vao nim 2015 [6] Do hien SPU va SSU l i nhCfng thiet bj chu yeu cho cdng nghe SBRTuy vao dieu kien cua md cung nhU die tfnh cua hon hpp dau - khf - nUdc ma ngUdi ta xem xet viec lap dat SPU hoic SSU 1.1 Bum tdng dp ngdm - SPU Nam 1992 dinh dau viec sCf dung SPU cho md Prezioso (Italia) nhim bu dip tdn hao i p suit nhanh qui trlnh khai thac, tang ap suit de di'y dau len thiet bj ndi be mat, nhien dU i n chi mdi mang tfnh chat thCf nghiem, chUa dip Ung dupe cac yeu ciu ve thuong mai [7] TU dd den nay, rat nhieu dU an ting cudng he sd thu hdi diu sCf dung SPU d i duac trien khai nhu dU i n BP ETAP, Topacio, Ceiba,BPSehiehallion,Tordis [6] DUa theo giin 66 ap suit - lUu lupng (Hinh 1), cd the thay trUdng hpp lap dit SPU, dudng cong i p suit - luu lupng se dich chuyen len phfa tren hon hpp dau khf dupe cung cap mdt lupng ap suit du Idn Oudng cong giao vdi dudng cong he thdng (dac trung cho tUng gieng) tai diu thi dd chinh l i sin lupng mdi sau lip dat SPU [8] Ve CO che hoat ddng, SPU tuong tU nhU cac he thdng bom diu hoic nUde khic, hdn hpp chit Idng se nhin dupe ning lupng tU may bom v i di chuyen tU diy bien len he thdng xCf ly trung t i m tren be mat Tuy nhien, hdn hpp chit Idng tU mieng gieng len la hdn hpp chUa qua xCf Diu Wli-so 3/2013 29 H O A - CHE BIEN D A U KHi ly, gom nhieu tap c h i t va nhieu pha, dd c i n phii ed thiet ke d i e biet de han che i n mdn, m i i mdn v i gia tang tudi tho cua m i y bom lam viec dUdi dieu kien nhiet dp va i p suit bien thien Idn Ve chUe nang, bom tang i p n g i m cd ba loai chinh: bom don pha (single phase p u m p - 5PP), bom da pha (multi phase pump - MPP) va bom hybrid Trong bom da pha MPP cd bom da pha cao i p (high boost MPP) ed the tao dupe ap suit Idn g i p l i n so vdi MPP thudng Hinh the hien Ung dung cua tUng loai bom cho tUng dieu kien t h i n h phan ty le lUu c h i t (gas volurrw fraction - GVF) v i i p suit c i n thiet [9] Hinh cho thay, bom SPP ed the tao i p suit cao nhat (tdi da len den tren 250 bar), nhien GVF chi gidi han dudi mUc 10% Bom MPP thudng hoat ddng mien - 95% GVF v i tao i p suit k h o i n g tren dudi 50 bar Bom da pha cao i p (mau xanh nhat), cd the tao i p suit tdi 200 bar, nhiifl bi gidi han hoat ddng k h o i n g 20 - 95% Bom Hybrid cd the hoat ddng tdt mien - % GV| va tao i p suit tdi da tuong dUong vdi da pha c ^ i p Thiet bj nen khf udt (wet gas compressor - WGQ (phan m i u v i n g ) thudc ve cdng nghe SCU Trong thiet ke b o m da pha thudng v i da pha Ty I? liAj chSt (%) Hinh Mien Ong dung cua cdc logi bam tdng dp ngdm cao i p , ed hai thiet ke chu yeu l i : thiet ke rupt ^ ddi (twin-screw p u m p - TSP) v i thiet ke true xoin Bdng So sdnh giOa bam TSP vd bam HAP [10] Thiet ke true x o i n Thiet ke ruot ga doi (Dong chiy tjnh tien) ; (GVF)t6ida Bornemann: chii yeu cung cap thiet bj tren bd va ngoai khoi, c6 dif an lip dat subsea (2005, 2007); Leistritz: chu yeu cung cap thiet bi tren bd va ngoai khoi, CO du an lip dat subsea (2010); GE Oil & Gas: cung cap thiet bi subsea; Flowserve: cung cap thiet bi tren bd va ngoai khoi 100% (khi ket hpp ciing vdi he thong tai sUdung luu chat)' I Ap suat tao T6ida100bar(1.450psi)' , H& so the tich Cdng suat Ap suit toi thieu j tai dau hut J nhdt luu chat \ Ap suat l^m viec j Thiet ke lip dat (Dong chiy doc true) :i Framo: chu yeu cung cap thiet bj subsea v i ci tren bd va ngoai khoi, da co 15 du i n lip dat subsea; Sulzer: cung cap thiet bj tren bd va ngoai khoi 100% (khi ket hop cung vdi thiet bj loc hoac thiit bi khuay)^ Toi da 200 bar (~ 2.900psi), thay d6i theo GVF va I dieu kien hut^ Toi da 1.200.000 thung/ngay' Toi da 450.000 thiing/ngay^ Ap suit quyen' 40psi^ MUc thap: 0,55cp (da kiem chUng)" MUc thap: 2cp (da kiem chUng)' MUc cao: chua xac dinh MUc cao: 4.000cp (da kiim chUng)' 5.000psi^ 15.000psi^ Lip dat ngang (thiet ke lip dat dUng dang qua Lip dat dOng (subsea) ho3c lip d§t ngang (tren trinh phat trien) Q*^") ,^ Ghl chu:' Theo Bornemann (httpJ/www.bornemann.com/multipho$e-boosting-teehnology):'Theo niin gidm cua Framo; > Theo Framo (httpy/www.framoeng.no/page/207/framo-mult,phase-pump-hx);'TheoSaadawiandAIOhma(2003):'TheoDav,svdnnk(2009) PETROVIETNAM (helico-axial pump - HAP) Ngoii cdn cd bom ly t i m diin ngim (electrical submersible pump - ESP), nhien nang han che cua loai bom bom hon hop diu cd ty trpng cao, ngudi ta thudng phii xCf ly hdn hpp diu trudc dua qua ESP Cfng dung cua ESP se dupc md t i tai muc 1.2 Do dd vdi muc dich bOm ting ap ngim, ngudi ta chu yeu stf dung TSP v i HAR Ci hai thiet ke diu cd the xCf 1;^ luu chit vdi GVF bien thien Idn (tUO - 95%, tdi da den 100%) Bing t h i hiSn sU so sinh giufa hai loai thiit k i cho bom da pha tang i p ngim theo mdt sd tieu chi chfnh Tii k i t q u i so sinh cho thiy cdng suit hoat ddng cua TSP hon hin HAP (1.200.000 thung/ngiy so vdi 450.000 thijng/ngiy), song vdi cic ti§u chi khic (dp nhdt cua diu cd the xii ly, i p suit chenh lech tdi da) thi HAP vUpt trdi hon TSR Vdi muc dich khai thic ngim thi HAP dupe i p dung nhiiu hon TSP nang van hanh tdt hon v i da dupc kiem chufng qua nhieu dUin Nhi sin xuat HAP Idn nhit l i Framo Engineering d i va dang phit trien he thdng bom ting i p ngim tich hpp them chufc nang dac kiem soit luu lupng lUu chit tU cic gieng, gpi la framo dual pump station - FDS cdng suit vUpt trdi so vdi HAP binh thudng Hinh minh hpa so dd lip d i t mdt FDS cho mdt md dang khai thic Theo Hinh 3, FDS trdng gidng nhU mdt cum phin ddng ngim, cd chUc nang tiep nhin luu chit tCr cic gieng, dac luu lupng va xic ^ n h cic tinh chit cua lUu chit, bom nguoc len thiit bj xCf ly ndi tren be mit bien Phuong thufe lip d i t FDS, kit ndi thiet bi vdi he thdng dudng ong va khai thic ngim, cich thufe lip d i t che dp theo ddi v i kiem soit FDS khdng nim pham vi bii Viet Bom hybrid l i sU cii tien cdng nghd, kit hpp hai kieu thiet ke TSP v i HAR de d i p ufng mdt sd yeu ciu khai thac die biet (ip suit cin tao cao, dp nhdt cua diu cao, GVF Idn) d i dupe tien hinh lip d i t cho md Pazfor (Angola) ciia Total [11] 1.2 Thiit bixdly ngdm - SSU Hlnh Sa dd Idp dgt hi thong SSU [12] Thiet bj xCf ly ngim hay thiet bi phin tich ngim - SSU cd chufc ning tich hon hpp d i u da pha cic pha rieng biet Ve CO che hoat dpng, SSU tuong tU nhu cic thiet bj phan tich tren eae he thdng xCf ly noi, hdn hpp diu dupc phan tich thiet bi dUa tren nguyen ly phin tich bing luc Do cic SSU dupc lip dudi diy bien, vi viy he thdng x i de ddt nhu tren mat bien l i khdng cd Ngoai ra, phin tich hdn hpp diu dudi day bien chi cd the phin tich hai pha thay vi ba pha nhutren mat bien, dd la: phin taeh pha Idng v i pha (liquid/gas SSU) v i phin tich OikU K H i - s o 3/2013 31 HOA - CHE' BIEN DAU KHi nude v i diu (oil/water SSU) Hinh minh hpa so lip dit thiet bi SSU 1.3 Phdn tdch pha Idng vd pha Khi sau dupe tich se dupe dua thing l§n giin xCf ly trung t i m qua mdt 16 thdng v i he thdng ong dan bing phuang phip tU nhi^n bin thin sau tich niy tdn tai ning lupng ben nd (Hinh 5) Hon hpp chat Idng sau tich se bao gom diu v i nude se dupe day len bdi mdt bom dien ly t i m ngim (electrical submersible pump - ESP) Nhu thiet k i hlnh, bom ESP dupe thiet k i dit thiet bi phin tich dUng (vertical annular subsea separation) ed nhiem vu bom hdn hpp dau v i nude qua mdt dudng ong Hinh Sa vdn hdnh hi thong SSU kit hop bam ESP [13] rieng Ngoii thiet ke va dip va phin tich bing trpng lUc, mdt sd trudng hpp, ngUdi ta lip dat them (Eq-2) mdt sd thiet bj nhim lim ting ning phan tich hdn Re Re hpp luu chat nhu lip hydrocyclone de loai bd cit, thiet ke cic dudng xoin de ben SSU de tang nang tich He sd Reynold ty le nghich vdi dp nhdt cua lUu chJt v i chit Idng Vi the, hdn hpp lUu chat cang nhdt thi he sd k^o cing ^., ™ toe dp ling cua chat Idng cang giim Trong thiet ke binh phin tich pha Idng v i pha khi, thudng i p dung dinh luit Stoke de tinh toin van tdc ling Viec lip dit eae Liquid/Gas SSU ma tieu bieu la VASP cOa chit Idng hon hpp luu chit [14]: tang ding ke hieu suit thu hdi diu, nhu tai md Marimba g: Gia tdc trpng trudng (9,81 m/s^); (Brazil), trUde va sau lip d i t VASR sin luong khai thac dau tang tii 35.000 thung/ngiy len 44.000 thung/ngiy, ting khoing 25,7% [13] Oac biet, trUdc lip dat VASP, de dat dupe sin lupng 35.000 thung/ngiy cin phii ip dung phuang phip bom ep khi, nhUng sau lip dat VASR sin lUpng dat 44.000 thung/ngiy m i khdng cin siJ dung phuang phip bom ep khf D: Oudng kinh eua gipt chat Idng (m); 1.4 Phdn tdch ddu vd nUdc Cj,: He sd keo; Thiet bj phin tach dau v i nUde cho phep tich nUdc khdi hdn hpp diu va H6n hpp diu v i se tiep tuc dupe day len de xii ly tiep tren mat bien bang mdt bom da pha ngim Viec k i t hpp stf dung giufa thiet bi phin tich va thiet bj dung cho muc dich bom dang l i xu hUdng eua the gidi i p dung cdng nghe SBR Bing cich kit hpp niy, hieu suit thu hdi dau se dupe ting len ding ke v i mat \j thuyet NUde sau tich ed the dupe dung de bom ep via neu dat chit lupng theo y§u ciu bom ep cua tiTng via Hdn hpp diu v i khf se dupc bOm len giin xCf ly d i phin tich tiep Luc nay, thiet bj phin tich tren giin trung tim se don giin hon chi yeu ciu phin tich hai pha, tU dd dan den tiet ki^m chi phi cua d u i n Hinh md t i he thdng phin tich ngim hai pha nUdc v i diu A.g.DlPrPg 3.Co (Eq-D Trong dd: V,: Van tdc ling cua gipt chat Idng (m/s); p, :Ty trpng cua chit Idng (g/l); Pg: Ty trpng eua (g/l) Vin tdc ling cing cao, thdi gian de pha tach khdi pha Idng cing nhanh Theo phuong trinh Eq-1, ed the thiy dudng kinh eua gipt chat Idng cing Idn hoic he sd kio cing thip thi van tdc ling se cang Idn Oe dat dupe dudng kinh tdi uu eua chat Idng trudc tich khdi hdn hpp lUu chit v i ling xudng diy binh phin tich, ed the thiit k i th§m mdt sd bd phin ben binh phin tich nhuthiet ke t i m tich tu - coalescing plate nhim tich tu cic gipt nhd thinh gipt Idn [14] He sd keo C^ phu thudc vio h i sd Reynold duoc tinh theo cdng thufe sau: 32 PETROVIETNAM Dudng khf phy He sd keo C^ tfnh toin dua theo cdng thUe Eq-2 nhung don gian hon [14]: 24 CD = — (Eq-4) Re CTng dung cdng nghe SBP ^ Bang tdm tat thdng tin mot sd md tieu bieu tren the gidi da va dang i p dung mdt phan hoac toan bd cdng nghe SBR Viec Ung dung giai phip cdng nghe niy da dem lai nhUng ket qua cu the nhU: giim chi phi CAPEX v i OPEX, tang sin lupng khai thac, nang cao he sd thu hdi diu, ting dim bio ddng chiy va dd ben he thdng khai Hinh Sadd md td hi thong phdn tdch ngdm pha ddu vd nudcthic [12]v i van chuyen ngim Cdng nghe ket hpp dang dupe sCf dung ngiy mdt nhiiu v i cho kit qui rat quan Sau i p dung cdng nghf SBR dU kien mdTyrihans (Na Uy) eua Statoil Hydro se ting sin lupng khai thac len 10%; md King (vinh Mexico) cua BP se ting sin lupng khai thic len 20% va he suit thu hdi ting 7%; md Tordis (Bien Bic) cua Statoil se ting h^ sd thu hdi tif 49% len 55% Odi vdi thiet ke SSU de tich dau va nudc, ngoai kfch thudc, kiiu ding, thiet bj ben thi toe dp ling eua nude so vdi diu rat dupc quan tim, thdng thudng dupe tinh theo cdng thufe [15]: Trong dd: -S¥^) (Eq-3) V^: Van tdc ling cua nUde via (m/s); g: Gia tdc trpng trUdng (9,81 m/s^); D: Oudng kinh cua gipt nUdc (m); Cdng nghe SBP dupe xem la mdt giii phap giup nang cao thu hdi dau cho cac md ngoai khoi dang khai thac (sin lupng khai thac sut giim, mUc dp ngap nudc tang, he thdng noi han che) cung nhu cho phep phat trien cic md mdi (dau ed ty trpng cao, ap suit thap, hydrate khi) Odi vdi Viet Nam, cdng tic tham dd, khai thic dau khf ngoii khoi hien dang gap mdt sd thach thUc: i p suit via khoing trung blnh va thap, giy khd khin viec dua sin pham khai thac len he thdng xCf ly ndi; nhiet dp lUu chat thap, lam cho nang hydrate ting, giy bit dudng ong dan luu chat tU mieng gieng len he thdng xd ly va dudng dng van chuyen; sU xim thue eua nudc sau mdt thdi gian khai thac; sU sut giam ap suit day gieng sau mdt thdi gian khai thic Do do, cdng nghe SBP la mdt nhtjfng hudng di mdi giup giii quyet cic van de ky thuit tren qua trinh khai thic dau khf bien, cho phep nang cao he so thu hdi dau, gia tang sin lupng khai thic cung nhU hieu qua dau tU, tan thu ngudn tai nguyen quy gia Idng dat Tuy nhien, nghien cufu Ung dung cdng nghe SBP cho tUng du i n cu the can can nhac cic van de sau: Cp: H i sd k^o; - Op tin cay cua eae thiet bj SBP: SBP d i t dUdi diy bien v i van hanh tU ddng, ning kiem soit tU bd hay tUtren giin xCfly, cung nhuvieebaotrl sebi han che p,,,: Ty trpng cua nude via (g/l); P„ :Ty trpng cua diu (g/l) Bdng Cdc md trin the gidi dp dung cdng nghi SBP khai thdc •API Cong nghe Pazflor/Anglola Total 800 17-22 SBP Marlim/Brazil Petrobras 900 19,6 VASP + ESP Tordis/Na Uy Statoil 200 19 SBP Perdldo/vinh Mexico Shell 2.438 22 SBP L i p dat 2010 BC-10/Brazil Shell 2.100 16-24 SBP Lap dat 2009 Marimba/Brazil Petrobras 400 20-30 VASP + ESP Ovr^n/Oiadiim Chu dau t u D o sau nUd Ket q u i First oil 2011 Tang san lupng tU35.000blpd len 44.000blpd Thu hoi tang 35MMbll, RFtangtU49%len55% N/A DAU KM SO 3/2013 33 HOA - CH^ BI^N DAU KHf Oien ning can thiet de van hanh he thdng SBP la rat Idn Trong mdt sd dU i n , han che ve ngudn dien ning ed the cung cip cho miy bom (2,5MW) ma ngudi ta phii cii tien bom da pha tang ap ngam thudng bam hybrid de dip Ung yeu cau Lua chpn he thdng SBP phu hpp (theo cdng suit, kich thude, ning xCf ly cit) de tdi Uu hieu qui dau tU Tii lieu tham khio Offshore hydrocarbons http://v\ww ifpenergiesnouvelles.com/publications/notes-desynthese-panorama/panorama-2012 ' VetcoGray integrated subsea systems httpV/www ge-energy.com/content/multimedia/_files/downloads/ VetcoGray%20integrated%20subsea%20systems.pdf Framo subsea technologies http://www.neesubsea no/publish_files/Framo_NCE_Presentation.pdf Subsea pumps httpV/www.tekna.no/ikbViewer/ Content/22993/Nils%20Arne%20S%C3%B8lvik.pdf 10 Comparison of multiphase pumping technologies for subsea and downhole applications httpV/www.spe org/ogf/print/archives/2012/02/02_l 2_16_146784.pdf 11 Hybrid pump, a new type of pump for the Pazflor deep sea project, http://www.utc.no/content/ ^ Pham Thanh Liem Exploration and production download/830/5042/version/5/file/1-i-Pierre activities in 2006-2010, plan for 2011 -2015 and strategy for 12 Subsea separation and processing of oil, gas and future upstream activities Deep water conference in Dalat produced water httpy/wwn«.forum.rice.edu/wp-content/ -Vietnam 12/9/2011 uploads/2011/06/011312RT_Prescott.pdf Mads Hjelmeland Framo engineering - subsea processing system Deep water conference in Dalat 13 John Preddy Engineering of subsea productior\ Vietnam 12/9/2011 systems 20M Nikhil Chaube FMC technologies - subsea separation 14 Surface production operation Volume I, 2" Deep water Conference in Dalat - Vietnam 12/9/2011 edition Ken Arnold and Maurice Steward - Gulf PublisM Company 1999 j Subsea boosting and processing developments http://www.offshore-mag.com/articles/print/volume-70/ 15 Terminal Velocity, http://en.wikipedia.org/wiki/ issue-50/subsea/subsea-boosting-and.html Terminal_velocity The subsea processing promise http://www offshore-technology.com/features/feature1412 Subsea boosting and processing technology, a solution for enhancing oil recovery of offshore fields Truong Due Trong, Hoang Thinh Nhan Petrovietnam University Offshore exploration and production activities have been boomed since the 1950s and increasingly develope with the active participation of the world's leading oil and gas companies According to statistics by 2010, offsh production regions represented nearly 650 billion barrels of oil equivalent (Gboe), accounting for 20% of know remaining global oil reserves 11] Nevertheless, offshore production requires complex technologies as a resu water depth, fluid characteristics (viscosity, density, and impurities) and reservoir conditions (temperatur pressure, etc.) involved This article introduces Subsea Boosting and Processing (SBP) technology, a new develo which has been researched and tested with the aim of enhancing oil recovery of offshore fields, especially fields high density oil and/or low pressure reservoir ... i p suit cao nhat (tdi da len den tren 250 bar), nhien GVF chi gidi han dudi mUc 10% Bom MPP thudng hoat ddng mien - 95% GVF v i tao i p suit k h o i n g tren dudi 50 bar Bom da pha cao i p (mau... WGQ (phan m i u v i n g ) thudc ve cdng nghe SCU Trong thiet ke b o m da pha thudng v i da pha Ty I? liAj chSt (%) Hinh Mien Ong dung cua cdc logi bam tdng dp ngdm cao i p , ed hai thiet ke chu... hut^ Toi da 1.200.000 thung/ngay'' Toi da 450.000 thiing/ngay^ Ap suit quyen'' 40psi^ MUc thap: 0,55cp (da kiem chUng)" MUc thap: 2cp (da kiem chUng)'' MUc cao: chua xac dinh MUc cao: 4.000cp (da kiim