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An apparatus for telemetering a downhole parameter from a well. The apparatus comprises a housing having a bore. The apparatus further comprises an annular main valve with an enlarged end positioned within the bore, with the main valve having a center of axis. A restrictor is concentrically dispose

An apparatus for telemetering a downhole parameter from a well. The apparatus comprises a housing having a bore. The apparatus further comprises an annular main valve with an enlarged end positioned within the bore, with the main valve having a center of axis. A restrictor is concentrically disposed within the bore, the restrictor configured to define an annular passage with the main valve. The apparatus also includes: a pressure device for supplying hydraulic pressure to the main valve; a control valve, operatively associated with the restrictor member, for controlling pressure to the main valve; and a solenoid control valve assembly for activating the control valve. In one preferred embodiment, the solenoid control valve assembly comprises a controller for emitting an electrical signal, a coil that receives the electrical signal and generates a magnetic field, a solenoid static pole receptive to the generated magnetic field, and a solenoid moving pole responsive to the magnetic field so that the solenoid moving pole moves in a direction towards the solenoid static pole. A method for communicating a downhole parameter is also disclosed.

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I claim: 1. An apparatus for telemetering a down hole parameter from a well, the apparatus comprising: a cylindrical housing having a bore there through; an annular main valve positioned within the bore, said main valve having a center of axis, and wherein said main valve is in a funnel shape havin

I claim: 1. An apparatus for telemetering a down hole parameter from a well, the apparatus comprising: a cylindrical housing having a bore there through; an annular main valve positioned within the bore, said main valve having a center of axis, and wherein said main valve is in a funnel shape having a tubular inlet and a tubular outlet; a restrictor member concentrically disposed within the bore of said cylindrical housing, said restrictor member being connected to said cylindrical housing, wherein said restrictor member being aligned with said center of axis, said restrictor member configured to define an annular passage with said main valve; a hydraulic circuit control pressure passage means for supplying hydraulic pressure to said main valve; control means, operatively associated with said restrictor member, for controlling pressure to the main valve; solenoid control valve assembly for activating said control means. 2. The apparatus of claim 1 wherein said solenoid control valve assembly comprises: controller for emitting an electrical signal; coil receiving said electrical signal in order to energize said coil and generating a magnetic field; solenoid static pole receptive to the generated magnetic field; solenoid moving pole responsive to the magnetic field so that said solenoid moving pole moves in a direction towards said solenoid static pole. 3. The apparatus of claim 2 wherein said control means comprises: a shaft operatively associated with said solenoid moving pole; a ball engageable with said shaft; a ball seat configured to sealingly engage with the ball. 4. The apparatus of claim 3 wherein said restrictor member includes a restrictor housing, having a bolt that is selectively movable within said restrictor housing to vary the size of the annular passage. 5. The apparatus of claim 4 wherein said restrictor housing further includes an annular screen for allowing passage of a fluid there through. 6. The apparatus of claim 5 wherein said main valve includes a radial surface, and wherein the hydraulic pressure of the drilling fluid acts against said radial surface via said hydraulic circuit pressure passage. 7. The apparatus of claim 6 wherein said hydraulic circuit control passage includes a path through said static pole and pass said ball seat in order for the hydraulic pressure to act against said main valve. 8. The apparatus of claim 7 wherein said controller terminates said electrical signal to said coil so that said coil de-energizes and wherein as said coil de-energizes, said shaft via the moving pole, returns and said ball is allowed to return to seal against the ball seat so that the main valve moves from a first position to a second position thereby enlarging the annular passage. 9. An apparatus for telemetering a down hole parameter from a well, the apparatus comprising: a cylindrical housing having a bore there through, said cylindrical housing having a cavity therein; an annular main valve positioned within the bore, said main valve having a center of axis, and wherein said main valve has a first end disposed within said bore and an enlarged second end, and wherein said main valve is movable from a first position to a second position and wherein said first end comprises a tubular inlet and said second end comprises a tubular outlet; a restrictor member concentrically disposed within the bore of said enlarged second end of said main valve, wherein said restrictor member is attached to said cylindrical housing and being aligned with said center of axis; a hydraulic circuit control passage means for supplying hydraulic pressure to said main valve; a control valve, operatively associated with said restrictor member, for controlling pressure to the main valve; a magnetic control valve assembly for activating said control valve in response to a measured down hole parameter. 10. The apparatus of claim 9 wherein said restrictor member being configured to define an annular passage with said main valve and wherein said restrictor member contains a diverter passageway so that flow through said annular passage diverts about an external portion of said restrictor member. 11. The apparatus of claim 10 wherein said magnetic control valve assembly comprises: a controller for emitting an electrical signal in response to the measured down hole parameter; a coil receiving said electrical signal, which energizes said coil and generates a magnetic field; a magnetic static pole receptive to the generated magnetic field; a magnetic moving pole responsive to the magnetic field so that said solenoid moving pole moves in a direction toward said magnetic static pole. 12. The apparatus of claim 11 wherein said control valve comprises: a shaft operatively associated with said solenoid moving pole; a ball engageable with said shaft; a ball seat configured to sealingly engage with the ball. 13. The apparatus of claim 12 wherein said restrictor member includes a restrictor housing having a bolt selectively movable to vary size of the annular passage relative to said main valve. 14. The apparatus of claim 13 wherein said restrictor housing further includes an annular screen operatively associated with said restrictor housing for allowing passage of a fluid there through and into said hydraulic circuit control passage means. 15. The apparatus of claim 14 wherein said main valve includes a radial surface and wherein said hydraulic pressure of a drilling fluid acts against said radial surface via said hydraulic circuit control passage means. 16. The apparatus of claim 15 wherein said hydraulic circuit control passage means includes a path through said static pole and said ball seat in order to act against said radial surface of said main valve. 17. The apparatus of claim 16 wherein said controller terminates said electrical signal to said coil, said coil de-energizes, and wherein as said coil de-energizes, said shaft via the moving pole, returns and said ball is allowed to return to seal against the ball seat so that the pressure is no longer communicated to said hydraulic circuit control passage means and said main valve moves from the first position to the second position thereby enlarging the annular passage. 18. A method of communicating a down hole parameter, the method comprises: providing a down hole apparatus, the down hole apparatus comprising: a cylindrical housing having a bore there through, said cylindrical housing having a cavity therein; an annular main valve positioned within the bore, said main valve having a center of axis, and wherein said main valve has a first end disposed within said bore and an enlarged second end, and wherein said main valve is movable from a first position to a second position; a restrictor member concentrically disposed within the bore of said enlarged second end of said main valve, wherein said restrictor member being aligned said center of axis, wherein said main valve has the first end disposed within the bore and the enlarged second end configured to form an annular passage about said restrictor member; hydraulic circuit control pressure passage means for supplying hydraulic pressure to said main valve; flowing the drilling fluid through the bore; emitting an electrical signal with a controller; receiving the electrical signal with a coil; generating a magnetic field; receiving the magnetic field at a solenoid static pole so that the solenoid static pole is magnetized; moving a solenoid moving pole in response to the generated magnetic field in the direction of the solenoid static pole; moving a shaft, said shaft being operatively attached to said solenoid moving pole; displacing a ball that is seated within a ball seat by the shaft; allowing pressure from the cavity to pass through the hydraulic circuit control passage means located within said cylindrical housing, which includes a path through the ball seat; allowing the pressure to act against a radial surface of said main valve; displacing said main valve from the first position to the second position; decreasing the area of the annular passage between said main valve and said restrictor member; causing a pressure pulse to be created within the bore of said cylindrical housing indicative of the down hole parameter. 19. The method of claim 18 wherein the step of flowing the drilling fluid through the bore includes channeling the turbulent flow of the drilling fluid through the enlarged second end of the main valve and into the annular passage. 20. The method of claim 18 further comprising the steps: terminating the electrical signal to the coil so that the magnetic field is terminated; moving the ball onto the ball seat via the pressure within the cavity; terminating the flow through the hydraulic circuit control passage means; moving the main valve from the second position to the first position via the pressure within the bore of the cylindrical housing thereby increasing the area of the annular passage between said main valve and said restrictor member.