Method and apparatus for actuation of downhole sleeves and other devices

A method for selectively shifting a moveable sleeve of a downhole tool comprising:

• a) deploying at least downhole tool in a wellbore, said downhole tool comprising:
• i) a housing member having a central through-bore;
• ii) a sliding sleeve operationally attached to said housing member configured to shift between a first position and a second position;
• iii) at least one actuation control device adapted to pass through said through-bore of said housing member, wherein said at least one actuation control device generates a magnetic field;
• iv) a sensor for sensing passage of said actuation control device;
• v) a counter for registering a count when an actuation control device passes said sensor;
• vi) a motor adapted to shift said sleeve;
• vii) a first fluid chamber;
• viii) a second fluid chamber;
• and
• ix) a needle valve assembly having an open position and a closed position, said valve assembly disposed between said first and second fluid chambers;
• b) passing at least one actuation control device through said through-bore of said housing member;
• and
• c) shifting said sleeve from said first position to said second position when said counter registers a predetermined number of counts.

An apparatus for selectively shifting a moveable member of a downhole tool comprising:

• a) a housing member having a central through-bore, said housing member further comprising:
• i) a first fluid chamber;
• ii) a second fluid chamber;
• and
• iii) a needle valve assembly having an open position and a closed position, said needle valve assembly disposed between said first and second fluid chambers;
• b) a moveable member operationally attached to said housing member configured to shift between a first position and a second position;
• c) at least one actuation control device adapted to pass through said through-bore of said housing member, wherein said at least one actuation control device generates a magnetic field;
• d) a sensor for sensing passage of said actuation control device;
• e) a counter for registering a count when an actuation control device passes said sensor;
• and
• f) a motor adapted to shift said moveable member from said first position to said second position when said counter registers a predetermined number of counts.