Method and apparatus for well casing repair and plugging...

Details Method and apparatus for well casing repair and plugging... Method and apparatus for well casing repair and plugging...

E - Fixed Constructions

21

B

E21B 29/10 (2006.01) E21B 47/07 (2012.01) E21B 33/138 (2006.01)

Patent

CA 2559226

Method and apparatus used to deploy and process eutectic metal alloy material into an oil, gas or water well for the purpose to plug and seal selected downhole casing leaks. The present invention provides an integrated solution for plugging and sealing of selected casing perforations while leaving the casing bore open to the net inside surface thereby eliminating the need for secondary milling or drill out operations. The apparatus consists of a power control unit located at surface and a downhole tool that is lowered into the well by standard wireline cable. The downhole tool delivers the necessary quantity of metal alloy, forms the required temporary bridge plug support for containing the molten alloy, melts the alloy by means of electric heating, heats the surrounding wellbore formation, squeezes the molten alloy through the perforations and recovers any excess alloy for subsequent recycling.

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