SELECTIVE WELL COMPLETION DEVICE Russian patent published in 2010 - IPC E21B33/12 E21B23/04 E21B33/13 

FIELD: oil and gas industry.

SUBSTANCE: device includes a tube slide valve installed on the tube, the body of which is connected to the section of casing string, which is located opposite the productive formation or interlayer and equipped with holes, and slide valve is connected to ring-shaped stop by means of which it is connected from time to time to the catch of actuator; catch includes cylindrical housing with radial spring-loaded cams installed on one and the same level, conical brace of the cams, drive of the brace, and is connected by mechanical draft to the ground lifting mechanism equipped with control unit and power supply. Device includes additional ring-shaped stop connected to the valve body; mechanical draft has the shape of logging cable, and actuator is fully installed on lower end of this cable. On the above cylindrical housing there telescopically located with possibility of being moved relative to the above catch is an additional catch which is equipped with the housing with radial spring-loaded cams and their conical brace, which are installed on one and the same level. This brace is connected to the above drive which is made in the form of spring-loaded electric heat mechanical working member. One of the catches has the possibility of being connected from time to time with its cams to the above additional ring-shaped stop. Housings of both catches are attached to each other by means of the additional drive equipped with two electric heat mechanical members. Each of electric heat mechanical members includes electric heat insulating casing inside which there installed is electric heater equipped with thermostat and straight-line wire made from alloy having shape memory effect, which are parallel to each other. In addition, control unit includes the control panel of the additional remote ultrasonic probe installed on the above cylindrical housing, and that control panel is equipped with a display; within the coverage zone of the above probe there located is inner surface of the well and two racks fixed on actuator and equipped with relief marks. One of the racks is attached to the above cone braces, and the other one - to the housing of the above additional catch. At that, ultrasonic probe and each of the above electric heaters are separately connected through logging cable and control unit to the above power supply.

EFFECT: simplifying the operation process and improving reliability of the device operation.

1 dwg