String shoe with valve BUR-BKK

;BUR-BKK-102; BUR-BKK-114; BUR-BKK-127; BUR-BKK-140; BUR-BKK-146; BUR-BKK-168; BUR-BKK-178; BUR-BKK-245;

Passage diameter of casing string mm; 101,6; 114,3; 127,0; 139,7; 146,1; 168,3; 177,8; 244,5; Maximum outer diameter, mm; 114,3; 127,0 141,3; 153,7; 166,0; 187,7; 194,5; 269,9; Inner diameter after dilling-out, mm; 89,0; 99,6; 112,0; 124,3; 129,1; 150,4; 159,4; 226,6; Max axial compression load, кН; 500; 600; 600; 700; 700; 900; 900; 1500; Central hole diameter, mm; 40,0; 50,0; 50,0; 60,0; 60,0; 70,0; 70,0; 120,0; Valve hole area, mm²; 1256,0; 1256,0; 1256,0; 1256,0; 3316,6; 3316,6; 3316,6; 3316,6; Max pressure difference per valve, Mpa; 35; 35; 35; 35; 35; 35; 35; 30; Length, mm; 370; 370; 380; 390; 390; 430; 450; 480; Weight, kgг; 5,7; 6,0; 6,8; 9,5; 10,2; 16,4; 18,0; 38,7;