Layin hydraulic ƙaramin diamita da aka yi amfani da shi don yin aiki da kayan aikin ƙarewar ƙasa kamar bawul ɗin aminci na ƙasa mai sarrafa ƙasa (SCSSV).Yawancin tsarin da layin sarrafawa ke aiki akan rashin aminci.A cikin wannan yanayin, layin sarrafawa yana ci gaba da matsa lamba a kowane lokaci.Duk wani ɗigowa ko gazawa yana haifar da asarar matsi na layin sarrafawa, yin aiki don rufe bawul ɗin aminci da ba da lafiya ga rijiyar.
Valve Safety Subsurface Mai Sarrafa (SCSSV)
Bawul ɗin aminci na ƙasa wanda aka sarrafa daga wuraren da ke sama ta hanyar layin sarrafawa wanda aka ɗaure zuwa saman waje na tubing samarwa.Nau'i na asali guda biyu na SCSSV sune gama gari: mai dawo da layin waya, ta yadda za'a iya gudanar da manyan abubuwan aminci-valve akan slickline, da kuma maido da tubing, wanda aka shigar da duka taron aminci-valve tare da igiyar tubing.Tsarin sarrafawa yana aiki a cikin yanayin rashin lafiya, tare da matsa lamba mai sarrafa hydraulic da aka yi amfani da shi don riƙe buɗaɗɗen ball ko taron flapper wanda zai rufe idan an rasa matsa lamba.