Kelly Valve

Kelly cock valve is a manual control valve in the drill string circulation system and is one of the effective tools to prevent blowout; it is upper Kelly valve and lower Kelly valve which is assembled the upper end and lower end of drill pipe.

The kelly valve can be opened on or closed off by the specoal operating spanner at 90 degrees according to the indicatong dorection.

Kelly Valve is an effective manually operated ball type valve for the drill stem. It located within the drill string that allow for free-passage of drilling fluid without pressure loss and are specifically designed for effective control of blow outs and/or mud loss control. The kelly valve is divided into upper kelly cock valve and lower kelly cock valve. The upper kelly cock is connected between lower end of swivel and upper end of kelly; the lower kelly valve is connected between lower end of kelly saver sub. The kelly valve can be opened on or closed off by only turning the special operating wrench at 90° according to indicating direction. During drilling operation, both upper and lower Kelly cocks should be connected to prevent accident during drilling operation.

Model	O.D.(mm)	Thread connection	I.D. (mm)	Working pressure (Mpa)
XS-86	86	NC26	30	30,70,105
XS-105	105	NC31	40	30,70,105
XS-111	111	NC31	40	30,70,105
XS-121	121	NC38	44.5	30,70,105
XS-127	127	NC38	44.5	30,70,105
XS-140	140	NC40	57.2	30,70,105
XS-XS146	146	4-1/2 REG	57.2/44.5	30,70,105
XS-159	159	NC46	61	30,70,105
XS-165	165	NC46	61	30,70,105
XS-168	168	NC50	71.4	30,70,105
XS-178	178	NC50,5-1/2 FH	71.4	30,70,105
XS-XS197	197	6-5/8 REG	76.2	30,70,105
XS-XS200	200	6-5/8 REG	76.2	30,70,105

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