INSTALLATION FOR SIMULTANEOUS-SEPARATE PUMPING WATER INTO TWO BEDS Russian patent published in 2009 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to installations for maintaining bed pressure of oil deposits. Installation consists of two-channel well-head equipment, a main packer installed between an upper and lower bed, the main production tubing communicating with the lower bed and an additional producing tubing installed concentric inside the main one. According to the invention the installation is equipped with an additional packer installed above the upper bed. Also the main and additional packers are assembled at the end of the additional production tubing and are connected with a bushing with lengthwise channel; the bushing props the additional packer from beneath and is rigidly connected with the main packer from above. The main packer is fixed relative to the flow string. The main production tubing is connected to the channel of the main packer by means of a movable packed connection. The additional packer is pressed with the additional production tubing from above; the said tubing can perform limited axial displacement downward relative to a stop and can be fixed in a transport position.

EFFECT: facilitates protection of a flow string from corrosion influence and from high pressure at simultaneous-separate pumping in two beds.

5 cl, 5 dwg