Compressed        

        Extended  

BUMPER SPRING

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The BUMPER SPRING is a new tool from Odessa Separator that is specially engineered and designed to protect the integrity of the well when parted tubing or tailpipe falls to the bottom.  Using a combination of friction and hydraulic  mechanisms,  the BUMPER SPRING absorbs and mitigates the impact caused by the weight of the assembly above it.

 

The Bumper Spring bull plug design uses fluid flow to center and maintain the stability of the falling BHA to prevent casing damage.  When the bull plug encounters the casing liner, the Bumper Spring compresses, absorbing the impact generated by the weight and velocity of the falling equipment.

THE MECHANICS OF THE OSI BUMPER SPRING

1. The weight of the BHA attached above the Bumper Spring creates a downward force on the shear pin section of the tool. The shear pin section has three pins that shear at 9700 pounds of force.

 

2. When the pins shear, the perforated upper section falls into the lower   section   of  the tool, where numerous stacked compression disks absorb the impact.

 

3.  The   perforations  in  the  upper  section  allow   fluid  to  flow  out  releasing the  pressure, in the housing, created by fluid accumulation.

 

4. The plunger forces fluid downward into the center tube.

 

5. The  fluid   pushes   back  up  creating  a  hydraulic  force   which  decreases the velocity and lessens the impact.

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FLOW VIEW

The Bumper Spring is designed for wells with 7” 

casing (26 lbs./ft. or lighter) and a 5-1/2” or 4-1/2” liner.