Abstract: A feeder of loose materials includes a hopper, a chamber with a control section fashioned as a latticed partition having placed thereon kinematically disconnected magnetic bodies, and a source of alternating magnetic field covering the chamber by magnetic lines of force it generates. The latticed partition has the form of a plurality of parallel vertically arranged plates secured in recesses of the chamber by horizontal pins for the plates to be capable of oscillating relative to these pins. The invention expands the field of application of the feeder, makes the feeder more reliable in operation, and improves the quality of the end product.

Abstract: A device for the transfer of plugging and grouting materials to, and their processing at, a pre-set level in a well comprises a pipe container which is rigidly mechanically connected by means of series installed limiter and cylinder to a drilling string. In the lower part of the pipe container, which is stopped by a plug, is installed a splitter and in the upper part, above waterproofing envelopes, is installed for axial movement along the pipe container a main piston having a rod to which is rigidly secured a retainer engageable with the limiter, and an auxiliary piston installed in the cylinder for axial movement therein, which is hydraulically coupled to the drilling string. The retainer is provided on the rod at a distance from the main piston to retain the main piston in its lowermost position immediately above the splitter.