SU135853A1 - Pumping unit for pumping water into the reservoir - Google Patents

Description

The invention relates to the field of pumping installations designed to supply water to a productive oil-bearing formation in order to maintain and increase formation pressure therein.

A device is known for injecting stratal water from lower-level aquifers into an upper oil-bearing stratum using an electric submersible pump and two pairs of cows isolating the oil-bearing stratum.

Distinctive and supportive. The main feature of the described pumping unit is the use of a piston deep pump to pump water into the oil reservoir, which is obtained both from the surface of the earth and from the overlying aquifer.

This is achieved by lowering a tubing string with a deep piston pump, a two-pass pipe and a packer below it into the casing of the injection well. Above the pump, in the discharge pipe, there are bore holes. The zone of the pump with through-holes above it and the upper holes of the two-passage pipe are covered with a cylindrical casing.

When pumping water from the upper part of its aquifer and the casing of the well in the aquifer zone, through holes are made. Such a device of a pumping unit, with the valve closed on the EE, the flow end of the injection pipe, provides for the transfer of water from the casing above the packer to the underlying oil-bearing formation.

H drawing shows a diagram of the proposed pumping unit.

A pumping station is lowered into the casing / well (where there is a productive oil (/) reservoir / 7 and aquifer B).

No. 135853-2

Injection pipe 2 is connected to the pump by f. A packer 5 is located below the pump and the casing /. Between the pump 3 and the baler 5, a two-port valve 6 is installed, divided by diaphragms (; 7 and 7 on the passages 8 and 9; i.riacT / 7 iproducts oil-bearing.

In the lower part of the passage channel 8 there are three holes //. They are suitable for passing water from the annular space of the casing / to the pump 3. And in the upper part of the passageway 9, I also have three holes / 2 - in. Water flow from the pump to the shank W and then to the productive hydraulic fluid)) layer I.

Casing 4, placed between the casing pipe and the pump, creates two annular orifice channels d: water, one between the pump 3 and the casing 4. and the second - between the casing - / and casing J.

The length of the casing is made with this)) calculation, 4To6i, i, the lower block of it covered the openings 12, and the upper end covered the openings 13. present in the pipe 2.

The pump works as follows: Water from the aquifer j but the annular space between the casing 4 and the casing / nostunat into the holes // two-way pipe, 6 and but the channel nostuyet to the pump 3. From the pump (or closed discharge valve I) water through the holes 13 nonadag in k (} frivolous iolism between pump 3 and the casing of 4 g. used for pumping water into productive oil-bearing and part from the surface of the earth; 1i. In this case, water is iodine (by gravity or its nominal, by pumping) pump) valve /

N oreme

A pumping unit for pumping water into an oil-bearing H.iacT with a submersible pump at the end of the discharge pipe, from 1C to the fact that, in order to reduce water injection into the surface of the earth or from the overlying water reservoir, the pump cylinder is surrounded by an annular casing with a two-port pipe, one stroke of which is in communication with the cavity of the cylinder, and the other with an annular cavity between the casing and the cylinder.