API Upper and lower kelly valve

API Upper and lower kelly valve
* API Spec 7-1
* Working pressure: 35,70,105Mpa
* Connected to kelly

API Upper and lower kelly valve
* API Spec 7-1
* Working pressure: 35,70,105Mpa
* Connected to kelly

API Upper and lower kelly valve

 

Kelly Cock Valve (Kelly valve/drill pipe safety valve), which is manually operated ball valve run in the I.D of drill string, is one of effective tools for prevent from blowout.

 

The Kelly cock valve is divided into upper Kelly cock and lower Kelly cock. The upper Kelly cock is connected between lower end of swivel and upper end of Kelly.

 

The lower Kelly cock is connected between upper end of drill pipe and lower end of Kelly or connected between lower end of Kelly saver subs.

 

The Kelly cock features a simple operation, the Kelly cock can be opened on or closed off by only turning the special operating spanner at 90 degree according to indicating direction. During drilling operation, in order to avoid serious well kick or blowout accident, the Kelly cock shall be connected at upper end and lower end of Kelly.

 

Detail Specification:

 

Technical specifications and parameters for Upper Kelly valve
Type	O.D.(mm)	Connection (LH)	I.D.(mm)	Working pressure (Mpa)
U146	146	4 1/2 REG	57.2	35, 70, 105
U197	197	6 5/8 REG	76.2	35, 70, 105
U200	200	6 5/8 REG	76.2	35, 70, 105

 

Technical specifications and parameters for Lower Kelly valve
Type	O.D.(mm)	Connection (LH)	I.D.(mm)	Working pressure (Mpa)
L89	89	NC26	30	35, 70, 105
L111	111	NC31	40	35, 70, 105
L121	121	NC38	44.5	35, 70, 105
L127	127	NC38	44.5	35, 70, 105
L159	159	NC46	61	35, 70, 105
L168	168	NC50	71.4	35, 70, 105
L178	178	NC50, 5 1/2FH	71.4	35, 70, 105