Ukukhaba okuphindaphindiweyo sisixhobo esiyimfuneko ukulawula ukukhaba kunye nokuphumeza iteknoloji yokulawula uxinzelelo lweoli kunye negesi yemithombo. Xa isithinteli sokuvuthela sivaliwe, uxinzelelo oluthile lwe-casing lulawulwa ngokuvula kunye nokuvala i-valve ye-throttle ukuze kugcinwe uxinzelelo lomngxuma ongezantsi luphezulu kancinane kunoxinzelelo lokubumba, ukuze kuthintelwe ulwelo olubunjwayo ukuba lungene equleni. Ukongeza, ukuminxeka okuninzi kungasetyenziselwa ukuthomalalisa uxinzelelo lokuqonda ukuvaleka okuthambileyo. Xa uxinzelelo olusequleni lunyuka luye kumda othile, lusetyenziselwa ukuvuthela ukukhusela intloko yomthombo. Xa uxinzelelo lomthombo lukhula, ulwelo olusemthonjeni lunokukhutshwa ukulawula uxinzelelo lwe-casing ngokuvula nokuvala i-valve ye-throttle (i-manual adjustable, i-hydraulic kunye ne-fixed). Xa uxinzelelo lwe-casing luphezulu kakhulu, luyakwazi ukuvuthela ngokuthe ngqo kwivalve yesango.