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

FIELD: oil production industry and well repair, particularly dump bailers, namely containers, for depositing substances in boreholes or wells.

SUBSTANCE: bailer comprises body with upper and lower technological orifices and with technological grooves, as well as sealing member. Body interior area located below technological orifices is sealed with plug. Stop is fixed to outer body surface. Cup spring-loaded relatively the stop and adapted to close lower technological body orifices in transport position is installed below the stop. Pin cooperating with technological body grooves is fixedly installed in outer cup to provide outer cup rotation relatively the body during axial displacement thereof. The pin may rotate with respect to the body only in one direction. The last axial technological groove cooperating with pin has length exceeding that of other ones. Sealing member may abut against lower body part as a plug air-tightly cooperating with well walls so that the plug may slide along the walls. The plug is provided with orifices closed with elastic collar from above so that well fluid may pass only in down-top direction.

EFFECT: increased reliability and reduced material costs.

2 dwg