Apparatus and methods of flow testing formation zones

A tool string for flow testing multiple zones in a wellbore, comprising:

• an inflatable packer or plug;
• an electric pump operable to inflate the packer or plug and comprising:
• a pressure balanced closed working fluid system having a working fluid pump and an electric motor operable to drive the working fluid pump, and
• a reciprocating hydraulic pump having a drive piston for selective fluid communication with the working fluid pump and a pump piston for selective fluid communication with the wellbore and the packer or plug;
• and
• a deflation tool operable to deflate the packer or plug in an open position,
• wherein:
• the deflation tool is repeatably operable between the open position and a closed position, and
• the tool string is tubular.

A tool string for flow testing multiple zones in a wellbore, comprising:

• a wireline cable head;
• upper and lower inflatable packers;
• an electric pump operable to inflate the packers;
• a deflation tool operable to deflate the packers;
• a flow meter;
• an upper electronic shut-in tool disposed between the packers and operable to selectively provide fluid communication between the wellbore and the flow meter;
• and
• a lower electronic shut-in tool disposed below the lower packer and operable to selectively provide fluid communication between the wellbore and the flow meter,
• wherein the tool string is tubular.