Umgca we-hydraulic we-diameter encinci osetyenziselwa ukusebenzisa izixhobo zokugqibezela i-downhole ezifana ne-surface controlled subsurface safety valve (SCSSV).Uninzi lweenkqubo ezisebenza ngomgca wolawulo zisebenza ngokungaphumeleliyo.Kule modi, umgca wolawulo uhlala ucinezelekile ngamaxesha onke.Nakuphi na ukuvuza okanye ukusilela kukhokelela ekuphulukaneni noxinzelelo lwentambo yolawulo, kusebenze ukuvala ivalve yokhuseleko kunye nokukhusela umthombo.
Ivalve yokhuseleko lwangaphantsi komhlaba (SCSSV)
Ivalve yokhuseleko lwe-downhole esebenza kwiindawo ezingaphezulu ngomgca wokulawula obotshelelwe kumphezulu wangaphandle wetyhubhu yokuvelisa.Iindidi ezimbini ezisisiseko ze-SCSV zixhaphakile: i-wireline inokubuyiswa, apho amacandelo aphambili e-valve yokhuseleko anokuthi aqhutywe kwaye athathwe kwakhona kwi-slickline, kunye ne-tubing retrievable, apho yonke i-asembly-valve yokhuseleko ifakwe kunye nomtya we-tubing.Inkqubo yokulawula isebenza ngendlela engaphumeleliyo, kunye noxinzelelo lwe-hydraulic control esetyenziselwa ukubamba ibhola elivulekileyo okanye i-flapper ibandla eliya kuvala ukuba uxinzelelo lolawulo lulahlekile.
