Yintoni umgaqo osebenzayo kunye nokusetyenziswa kwe-kelly valve?

1. Injongo yevalvu kaKelly

Ivalvu ye-kelly yivalvu yokulawula ngesandla kwinkqubo yokujikeleza kwentambo yokubhola kwaye yenye yezixhobo ezisebenzayo zokuthintela ukuqhushumba. Iivalvu zeKelly zingahlulwa zibe ziivalvu ze-kelly eziphezulu kunye neevalvu ze-kelly ezisezantsi. Ivalvu ye-kelly ephezulu isetyenziswa phakathi kwesiphelo esisezantsi sempompo kunye ne-kelly; ivalvu ye-kelly esezantsi isetyenziswa phakathi kwesiphelo esisezantsi se-kelly kunye nejoyinti yokukhusela i-kelly. Ulwelo lokubhola lungahamba ngokukhululekileyo kwivalvu ye-kelly ngaphandle kokwehla koxinzelelo. Sebenzisa isikrufu esikhethekileyo ukuyijika i-90° ngokwemiyalelo yokuyivula nokuyicima.

2. Ulwakhiwo lwevalvu kaKelly kunye nomgaqo wokusebenza

Ivalvu ye-kelly ephezulu nesezantsi yenziwe ngomzimba, isihlalo sebhola esisezantsi, ispring, isitshixo sokusebenza, ivalvu yebhola, indandatho yokugcina evulekileyo, isihlalo sebhola esiphezulu, isilingi sendandatho yokugcina, indandatho yokugcina elastiki kunye nesitywini, isikrufu sokuncedisa, njl. Umgaqo wokuvala kukuba ispring ixhasa isihlalo sebhola ukuze ibeke ibhola kwaye yenze ukuba ibe nomthwalo othile. Ibhola kunye nesitywini sesihlalo sebhola zisondelelene. Xa ibhola ikhutshiwe, amehlo amanzi awathintelwa. Xa ivaliwe, umphezulu ojikelezayo uvala onke amehlo amanzi. Uxinzelelo lwe-annulus yangaphakathi lusebenza ebholeni, okwenza ibhola kunye nesihlalo sebhola sibe kwimeko yokutywina enoxinzelelo oluphezulu.

3. Indlela yokusebenzisa ivalvu ye-kelly

(1) Ngaphambi kokusebenzisa, sebenzisa isikrufu esikhethekileyo ukujikelezisa isitshixo sokusebenza ukuze ubone ukuba singajikeleza ngokuguquguqukayo, endaweni yaso okanye singangeni kwindawo yaso;

(2) Emva kokudibanisa iziphelo eziphezulu nezisezantsi ze-kelly, sebenzisa kwakhona isikrufu ukuvavanya ukuguquguquka kwezitshixo zokusebenza ngaphambi kokuba wehle emthonjeni;

(3) Xa kukhatywa okanye kuqhume i-kelly emthonjeni, ivalvu yeplagi ephezulu okanye esezantsi ye-kelly kufuneka ivalwe kwindawo ekufutshane;

(4) Ngexesha lokusebenza okuqhelekileyo, vala ivalvu yeplagi esezantsi ngaphambi kokuba ukhuphe i-kelly ukuze uthintele ukuba ulwelo lokubhola lungatshizi kumgangatho wokubhola;

(5) Phikelela ekuvuleni nasekuvaleni rhoqo ii-cocks eziphezulu nezisezantsi ze-kelly. Umzekelo, xa uqhagamshela iqhekeza elinye okanye usebenzisa ii-cocks eziphezulu nezisezantsi ze-kelly ezihambayo ngamaxesha athile, ukuze uphephe ukugqwala kwaye ungakwazi ukuvula nokuvala ngokuqhelekileyo;

(6) Emva kokudibanisa iqhekeza elinye, ivalvu yeplagi evaliweyo kufuneka ivulwe ngexesha elifanelekileyo ukuze kuthintelwe ukubamba ipompo xa iqalisa ipompo;

(7) Isikrufu sevalvu yeplagi kufuneka sibekwe kude nentloko yomthombo ukuze singawi emthonjeni okanye silahleke;

(8) Xa ukhetha ivalvu yeplagi, qiniseka ukuba uxinzelelo lwayo oluphezulu olusebenzayo luhambelana nenqanaba loxinzelelo lweqela lokuthintela ukuqhushumba kwe-wellhead.