Dump Bailer

A dump bailer for placement of flowable solids material downhole in

• a wellbore, comprising:
• an elongated cylindrical housing having an opening in the bottom and a cavity therein;
• an electric solenoid coil disposed around said open bottom of said housing, said electric coil connected to a source of electric current;
• a cylindrical sleeve disposed within said housing, said sleeve slidable between a first position wherein said sleeve closes said opening in said bottom of said housing, and a second position wherein said opening is open and flowable material within said cavity can flow out;
• a means for retaining said sleeve in said first position while a volume of flowable material is disposed within said cavity;
• said sleeve responsive to a magnetic field created by energizing of said electric solenoid coil such that a force arising from said magnetic field overcomes said means for retaining said plug in said first position and moves said sleeve to said second position, whereby said flowable material may flow from said cavity.