Back to results
US 2013/0075101 A1Published application
Dump valve arrangement for fracturing tool set
OwnerMichael Joseph Felthager, SR.inventor
Life of this patent
Estimating the term…
Abstract
A dump valve arrangement for a fracking tool coupled to a length of coil tubing includes an axially displaceable inner mandrel which cooperates with a valve arrangement to allow for releasing fracturing fluid through the central bore of a fracturing tool to an outlet port positioned at the bottom of the tool string. Displacement of the inner mandrel is effected as a result of the normal sequence of operation of the fracturing tool set. The valve arrangement is in a closed position during both the insertion and positioning of the tool string.
Claims1
A valve assembly for a fracturing tool set comprising:
- an elongated generally cylindrical valve main body having a central bore sized for slidably receiving an inner mandrel positioned therein, said inner mandrel connected to a length of coil tubing, said inner mandrel adapted for axial movement within said valve main body in response to axial movement of said coil tubing;
- a plug member positioned on an annular seat formed in an end portion of said valve main body, said plug member having a collar and a downwardly depending plug, said collar having a plurality of ports formed therein, said plug sized for frictional sliding engagement within said inner mandrel;
- whereby axial movement of said inner mandrel effects positioning of said valve assembly between open and closed positions.
Dependencies are inferred from the claim text.