SELECTIVE WELL COMPLETION DEVICE Russian patent published in 2010 - IPC E21B23/00 E21B34/14 

FIELD: oil and gas industry.

SUBSTANCE: selective well completion 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 and equipped with holes. Slide valve is equipped with two ring-shaped stops by means of which it is connected to the catch from time to time. Catch includes cylindrical housing with spring-loaded extendable cams and conical brace with a drive, which are located in it, and is connected by means of mechanical draft to the ground lifting mechanism attached to the ground power supply and control unit. At that, the device also includes independent electrical power supply located in the catch housing and made in the form of electrical accumulator or a set of electric batteries, at least two reed relays, similar number of signaling devices - electric lamps and at least three concentrically ring-shaped constant magnets installed in the well, as well as two radio contact devices mutually connected by means of radio on air. One of radio contact devices is located on the catch and equipped with the antenna in the form of electroconductive mechanical draft and connected to the independent power supply, and the other one is located on the ground surface and is connected via control unit to the ground power supply. Mechanical draft is flexible and made in the form of electroconductive rope. Drive of the brace includes electric heater equipped with thermostat, the working member located within its coverage and having the effect of shape memory in the form of straight-line wire from titanium nicelide and reverse element of the working member which is balanced and made in the form of a brace, and electric heat-insulating housing. At that, through the radio contact device fixed in the catch, the heater and each reed relay is separately connected to independent power supply, and by means of both radio contact devices the heater through the control unit and each reed relay separately through the control unit and one of the lamps are connected to the ground power supply.

EFFECT: enlarging functional capabilities of the device.

3 cl, 1 dwg