BAILER FOR CEMENT BRIDGE FORMING IN PREDETERMINED WELL INTERVAL Russian patent published in 2006 - IPC E21B27/02 

FIELD: oil and gas industries, particularly well operation and repair.

SUBSTANCE: bailer comprises conductor-and-support cable and body in which container with rupturable diaphragm filled with cement mix is arranged. The container has electric drive, pump adapted to provide displacing pressure in the container and rubberized fabric shell connected to multiplier to create internal shell pressure exceeding hydrostatic well pressure and to retain the cement mix after cement mix pouring from the container. Cavity communicating with the well medium through pressure-equalization valve is defined between rupturable diaphragm and the shell.

EFFECT: possibility to install cement bridges in well independently of height of liquid column above the bailer, possibility to retain grouting mortar in predetermined support member interval, increased drilling ability of the support member.

2 dwg