BAILER FOR SEPARATING BRIDGE INSTALLATION IN WELL Russian patent published in 2007 - IPC E21B27/02 

FIELD: oil production industry, particularly dump bailers, for instance, containers for depositing substances, namely cement or acids, in boreholes or wells.

SUBSTANCE: bailer comprises body, sealing member with spring-loaded limiter located from sealing member bottom and with mounting cylinder arranged from top thereof. Bailer also has fixer and releasing mechanism. Manufacturing grooves, as well as upper and lower manufacturing orifices are made in body. Stop with spring and fixed centrators is located in the body so that the stop may perform axial and rotational movement. Axial sealing member movement with respect to the body is limited by fixes including outer cup. Retainers are installed in lower manufacturing orifices of the body and may cooperate with outer annular groove of mounting cylinder. Outer cup may slide in axial direction and cooperate with retainers by inner surface thereof. Inner cup surface has variable cross-section. Outer cup is secured with respect to the body by means of locking member. Releasing mechanism includes cylinder with pin and may control axial stop movement. Cylinder is secured to the stop so that it may perform rotational movement. Pin cooperated with manufacturing grooves. The manufacturing grooves are made so that as stop reciprocates with respect to the body pin may rotate relatively the body only in one direction. The last axial manufacturing groove adapted to cooperate with the pin has increased length in comparison with other grooves. The sealing member is additionally spring-loaded in downward direction relatively the body. Locking member is made as stop fixedly secured to the body and located over the outer cup.

EFFECT: increased reliability.

3 dwg