Flow-activated valve and method of use

A flow-activated valve assembly comprising:

• I. An outer body and stationary mandrel assembly comprising:
• a. A top housing having a cylindrical body forming a cavity, having opposite ends;
• b. A lower valve body operatively engaged to said top housing to maintain relative position having a cylindrical body with opposite ends and forming a cavity;
• c. An upper valve body operatively engaged to said lower valve body to maintain mechanical communication, having a cylindrical body with opposite ends and forming a cavity and having a plurality of bores drilled through the body;
• d. An upper stationary valve mandrel operatively engaged with said top housing to provide mechanical communication, with a cylindrical body forming a cavity having opposite ends;
• e. A lower stationary valve mandrel operatively engaged to said upper stationary valve mandrel to maintain mechanical communication, having opposite ends, with first end having a cavity extending though a portion of the first opposite end, the closed end of said cavity having four bores each ninety degrees from the next, from within the cavity through the wall of said mandrel, whereby fluid may flow through said bores;
• the open end of said cavity having proximate to it another set of bores extending from the inside of said cavity to through the wall of said lower stationary valve mandrel, second end of said lower stationary valve mandrel having grooves cut longitudinally to permit the flow of fluid past said second end of said lower stationary valve mandrel;
• II. An inner mandrel assembly shaped to fit within said outer body assembly, comprising:
• a. An upper valve mandrel with a cylindrical body forming a cavity having opposite ends;
• b. A middle valve mandrel operatively engaged to said upper valve mandrel to maintain mechanical communication, with a cylindrical body forming a cavity having opposite ends, first opposite end being of larger diameter than the body of said middle valve mandrel, and where change in diameter of said middle valve mandrel occurs, said middle valve mandrel having a plurality of bores extending through said wall of said middle valve mandrel into said cavity, and proximately located to the said first opposite end of said middle valve mandrel, a plurality of bores;
• c. A lower valve mandrel operatively engaged to said upper valve mandrel to maintain mechanical communication with a cylindrical body forming a cavity having opposite ends, first opposite end having threads on the surface forming its outer diameter for attachment and operatively engaged to said upper valve mandrel to maintain mechanical communication and second opposite end being operatively engaged to an accelerator to maintain mechanical communication;
• said second end of said lower valve mandrel shaped to operatively receive said second opposite end of said lower stationary valve mandrel to maintain mechanical communication;
• d. An exhaust piston with a cylindrical body forming a cavity shaped to receive said lower stationary valve mandrel within the surface forming its outer diameter permitting longitudinal movement along said lower stationary valve mandrel and having opposite ends, said opposite ends having a plurality of mill slots, for hydraulic fluid to pass through.

The method of exerting a vibratory force to any obstruction via a down hole tool using a flow-activated valve assembly comprising:

• an outer mandrel adapted to be operatively engaged to provide mechanical communication with a work string and having an internal diameter capable of permitting any fluid to flow through it, a reciprocating valve shaped to fit within said outer mandrel, an inner mandrel shaped to fit within said reciprocating valve and operatively engaged on one end to said outer mandrel to maintain relative position to said outer mandrel and having an internal diameter capable of permitting any fluid to flow into it, a reciprocating sleeve shaped to engage a portion of the surface forming the outer diameter of said inner mandrel and a plurality of relief ports fore and aft configured in said inner mandrel to permit the escape of said fluid flowing therein, the method comprising:
• attaching said flow-activated valve assembly to a work string;
• placing said work string against an obstruction;
• and
• pumping fluid into said flow-activated valve assembly.