BY-PASS VALVE

When well kick take place and pump pressure is too high or blocked, the following  steps can be taken to open the By-Pass Valve : 

● Discharge Kelly and drop in a steel ball (or a Nylon ball) which is carried by tool; 

● Connect with Kelly; 

● Put ball into retainer by pump circulation;  

● When fluid is closed, the shear pin can be sheared off by adding 0.5~1.5MPa  higher pump pressure than original pump pressure; 

● After pin is sheared, the seal sleeve move down to open the discharge hole and  pump pressure come to drop down , then normal circulation and well killing operation  can be started. 

When ordering please specify

● O.D. of body; 

● Connection; 

● Pump pressure required to shear off pin (per customer requirement)