THE UNRESTRICTED-CYCLE BYPASS VALVE

The unrestricted bypass valve to achieve the bypass open and close in umlimated times, Thus, multiple connections and disconnections between water hole and annulus can be realized by one drap ball and flow rate control.

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Description

Application:

The unrestricted bypass valve to achieve the bypass open and close in umlimated times, Thus, multiple connections and disconnections between water hole and annulus can be realized  by one drap ball and flow rate control. It can be use for:
           Protect BHA (When pump LCM, Spotting Acid and Mud).
           Horizontal drilling (Boosting annular velocities and Low side cuttings cleanout ）Borehole enlargement （Cutting acceleration while reaming).
          Work-over and completions Well bore cleanout,Fluid displacements, Bottoms-up circulation.

Features:

Easy to use only one activation ball can complete the operation;
Quick switching of working mode, bypass and non-bypass can be completed within 10 seconds when the ball seat seal is activated;
Unlimited cycle switching can be realized by flow rate control without multiple activation balls;
Activation balls of various diameters can be used to adapt to different borehole diameters of drill string;
Can be configured in any position in the drill string does not require liquid through the hole above the tool;
Save the time of drilling and taking out the activation ball collector;
Automatic emptying of pipe string during drilling;
Allow fishing operations under the tool before the ball is dropped or after the borehole passage is opened through the activation ball of the fishing seat seal;
When the pump rate decreases significantly, the bypass is automatically closed to maintain well control safety.

Working principle: