Patent ID: 9038714
Filing Date: 2015-05-26
Classification: E21B

Abstract:
1. A dump bailer for placement of flowable solids material downhole in a wellbore, comprising: an elongated cylindrical housing positioned downhole in said wellbore 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 having an opening in the wall of said sleeve disposed within said housing, said sleeve slidable between a first position wherein said sleeve closes said opening in said wall of said sleeve, and a second position wherein said opening in said wall of said sleeve 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; and 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 flows from said cavity.