Surestrong Machinery Co.,Ltd is one of the leading China kelly valve manufacturers and suppliers, welcome to check kelly valve price and design with us, and also we are always able to offer you kelly valves, lower kelly valve, upper kelly valve for sale. Kelly cock valve Brief introduction : Kelly cock valve is a manual control valve in drilling string cycle system .It is one of the effective tools for preventing blowout. It is divided into upper kelly cock valve and lower kelly cock valve. .Upper kelly cock is located at the position between lower end of swivel and the top of kelly stem. Lower kelly cock is located at the position between lower end of kelly stem and drilling rod or kelly stem saver sub. With special spanner according to instruction and requirement to roll operational key 90 degree, so that can achieve to open and close .In order to avoid blowout,it should be assembled kelly cock valve on two ends of kelly stem. Specifications: Upper parts Model O.D(mm) Water eyes diameter (mm) connection thread (LH) Working pressure (Mpa) Range CS146 146 50 4 1/2″REG-LH 35 70 105 Square kelly and hexagon kelly CS200 200 76 6 5/8″REG-LH 35 70 105 lower parts Model O.D(mm) Water eyes diameter (mm) connection thread (LH) Working pressure (Mpa) Range XS105 105 41 NC31 35 70 105 Square kelly and hexagon kelly XS121 121 50 NC38 35 70 105 XS127 127 50 NC38 35 70 105 XS165 165 61 NC46 35 70 105 XS178 178 71 NC50 5-1/2FH 35 70 105
