;BUR-BKBK-146; BUR-BKBK-168; BUR-BKBK-178; BUR-BKBK-245;
Passage diameter of casing string, mm; 146,1; 168,3; 177,8; 244,5;
Maximum outer diameter, mm; 166,0; 187,7; 194,5; 269,9;
Inner diameter after drilling-out, mm; 129,1; 150,4; 159,4; 226,6;
Max compression load, кН; 250; 350; 350; 500;
Diameter of hole, mm; 110,0; 110,0; 110,0; 110,0;
Valva hole area, mm²; 3316,6; 3316,6; 3316,6; 3316,6;
Max pressure difference per valve, MPa; 35; 35; 35; 30;
Length, mm; 240; 260; 280; 310;
Weight, kg; 10,9; 17,2; 18,6; 44,3;