Zida Zothandizira Pachitsime cha Mutu wa Tubing: Kuvala Chitsulo, Zida Zoyesera/Kuchotsa Kupanikizika & Ma Vavu Otsekereza Kumbuyo

Chitsulo chomangira chimayikidwa mu mutu wa chivundikiro kapena mtanda wa mutu wa chivundikiro panthawi yobowola ndi ntchito yokonzanso kuti chiteteze mutu wa chivundikiro ndi mtanda wa mutu wa chivundikiro kuti chisawonongeke chifukwa cha chingwe chobowola. Chimaperekedwa m'chitsime kudzera mu chida choyesera cholumikizidwa ku chitoliro chobowola, ndipo chimatsekedwa bwino pamalo pake pogwiritsa ntchito maloko a waya pamwamba pa mutu wa chivundikiro kapena mtanda wa mutu wa chivundikiro.

Chida ichi chogwiritsidwa ntchito kawiri chimachepetsa kuchuluka kwa zinthu zofunika. Chikhoza kuyikidwa mkati mwa mutu wa casing kapena mtanda wa casing head. Pa nthawi yobowola kapena yogwirira ntchito, chitoliro chobowola chimatha kudutsa mu chidacho mosasamala kanthu kuti zida zobowola zili m'bowo, zomwe zimathandiza kuyesa kuthamanga kwa BOP stack ndi manifold. Chidacho chikhoza kubwezeretsedwanso kuti chiyike kapena kuchotsa bushing yosweka.

Ma valve opanikizika kumbuyo amapezeka m'njira imodzi ndi ziwiri:

Mitundu yonse iwiri ili ndi ulusi wapadera wa trapezoidal wokhala ndi mano afupiafupi, womwe umapereka mphamvu zambiri, kukana kugwedezeka komanso moyo wautali. Mukagwiritsa ntchito ndi chida chokhazikitsa/kuchotsa valavu yakumbuyo, mavalavu amatha kuyikidwa mwachangu komanso mosamala kudzera mumtengo wa Khirisimasi, zomwe zimathandiza kuti kuthamanga kwa mpweya kuyende bwino.