Isebenza kanjani i-Multiple Activation Bypass Valve (MCBV)?

Endabeni yokujikeleza okulahlekile ngesikhathi sokumba, ukusetshenziswa kokusebenza okuningi kwe-valve ye-bypass kungafinyelela ukugxila okuphezulu okuningi, izinto ezinkulu zokuxhuma izinhlayiya kanye nokuxhuma ukuxhuma usimende ngaphandle kokukhipha i-BHA.

Ukuvula i-bypass valve: ngaphambi kokusebenza kokuxhuma, qala ngokukhipha i-BHA uye esigabeni somthombo ophephile bese uphonsa ibhola elisebenzayo. Uma ibhola elisebenzayo litholakala esihlalweni sebhola, iphampu ephansi izobamba kancane ukucindezela. Uma umehluko wengcindezi ufinyelela ku-0.7-1.5mpa, ingcindezi yokubamba ingcindezi inkulu kunamandla asentwasahlobo ukwenza umkhono wokuslayida wehle. Lapho umkhono oslayidayo wehlela ezansi endaweni yomkhawulo ophansi, imbobo yokudlula yomkhono oslayidayo iqondaniswe nembobo yokudlula yengxenye engenhla engaphansi, futhi i-valve yokudlula iyavulwa. Khulisa ukufuduka endaweni yokwakha, futha i-plug slurry, futhi i-pluging slurry ingena ungqimba wokuvuza ukusuka embotsheni yokudlula ukuze uxhume ngokuqondile. Lapho iphampu imisiwe, umkhono wokuslayida uzosetha kabusha ngaphansi kwamandla entwasahlobo, futhi i-valve yokudlula izovala ngokuzenzakalelayo, ukuze kuncishiswe umphumela wepayipi ongase umise okwe-U noma izinkinga zokulawula umthombo. Uma imbobo yokudlula idinga ukuphinda ivulwe, iphampu ingaphinda isetshenziswe kancane.

Ukuvalwa kwe-valve ye-by-pass: ngemva kokuphothulwa kokwakhiwa kokuxhuma, lapho kudingekile ukuqhubeka nokubhola, phonsa amabhola amabili avaliwe. Lapho ibhola elivaliwe lifika emgodini we-by-pass, liqala ukubamba ingcindezi futhi linyuse kancane ingcindezi. Lapho umehluko wengcindezi ufinyelela ekucindezelweni okuklanyelwe kwe-shear kwebhola elicushiwe (ingcindezi yokuklama ingu-10 MPa), ibhola elicushiwe liyagundwa futhi lidlule esihlalweni sebhola, futhi ibhola elicushiwe nebhola elivaliwe konke kuwela kubhasikidi webhola. Umkhono oshelelayo uya phezulu ngaphansi kwesenzo samandla asentwasahlobo, imbobo yokudlula yomkhono oslayidayo inyakaziswa ngembobo yokudlula yejoyinti eliphezulu, i-valve yokudlula ivaliwe futhi ukubhola kuqalwa kabusha.

Ekusebenzeni komthombo ovundlile, oqondisayo futhi ochezuke kahle, ukusetshenziswa kwe-Multiple activation bypass valve, ekwazi ukubona indawo enkulu yokugudluzwa kahle kanye ne-rock cuttings bed flushing, engathuthukisi nje ukusebenza kahle kokushaywa, kodwa futhi ivikela amathuluzi namathuluzi we-downhole. , Uma kunesidingo, vula imbobo yokudlula ukuze uhlanze udonga lwangaphakathi lwe-casing noma iqembu le-BOP.

Uma isistimu yokudlula idinga ukuvalwa, faka amabhola amabili avaliwe, cindezela ngaphandle kwebhola lokukhiya ngokucindezela ukubamba (ingcindezi yokuklama ye-locking ibhola extrusion ingu-7MPa), futhi uqhubeke ubambe ingcindezi yokuvala uhlelo lokudlula.