BAILER FOR PARTITION BRIDGE CONSTRUCTION IN WELL Russian patent published in 2006 - IPC E21B27/02 

FIELD: oil and gas industries, particularly dump bailers, namely containers for depositing substances, for instance cement or acids, in boreholes or wells for the purpose of borehole or well repair.

SUBSTANCE: bailer comprises body having upper and lower technological orifices and technological grooves, as well as sealing member. Stop with centrators is installed on the body. The stop may perform axial and rotary movement with respect to the body. In transport position lower technological orifices of the body are sealed with outer cup. Cylinder with pin is fastened to the stop so that the cylinder may perform rotary movement. The pin cooperates with technological grooves, which are created so that when rest reciprocates with respect to the body the pin may rotate with respect to the body only in single direction. The body is blanked below lower technological orifices. Annular extension is formed in lower body part. Outer cylindrical recess is formed over the annular extension and adapted to support outer cup provided with radial orifices. Sealing member may abut against the body from below and is made as plug tightly cooperating with well walls. The plug has orifices, which are enclosed with elastic collar from above to open well fluid flow only in bottom-top direction.

EFFECT: simplified structure and increased operational reliability.

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