RU33785U1 - Device for oil production by a deep-well pump - Google Patents

Description

 WWWI MKI R04V47 / 00

pVaiiii fSS; Borehole Rod Pump

The utility model relates to borehole sucker-rod pumps designed for pumping high-water-cut, viscous, and significant gas contents from oil wells.

A well-known sucker rod pump for pumping highly viscous fluid from wells (Oilfield equipment; Handbook / Ed. By E.I. Bukhalenko. - 2nd ed., Revised and additional - M .; Nedra, 1990.-559 p .; silt .(1).

When the plunger moves down in the area of cylinders enclosed between the plungers, a vacuum is created, due to which the lower valve of the valve unit block opens and formation fluid enters the said zone. Closed at the same time, the upper valve of the valve block unit perceives the pressure of the liquid column and creates an additional downward load, which helps to overcome the hydraulic resistance in the pump and the friction forces of the rod string against the pumped out highly viscous liquid. The latter is very dry; it is natural, since it eliminates the hang of the rods due to excessive friction.

A disadvantage of the known device is the inability to use a device for pumping liquids from a well with a free gas content at a pump intake and mechanical impurities of more than 1.3 g / l. The closest in technical essence and purpose to useful

The model is a sucker rod pump for pumping out highly carbonated liquids (USSR Author's Certificate No. 1035282) (2). The pump consists of a plunger and a cylinder forming a working pair with discharge and receiving valves installed respectively in them. A filter is installed at the pump inlet. The filter is connected to the pump intake using a flexible hose. Under the influence of the weight of the load, the filter is located on the lower generatrix of the casing. After installing the pump in an inclined well, under the influence of the weight of the load, the filter takes its extreme position due to the presence of a flexible hose. During the upward stroke of the plunger, there is a suction stroke, fluid from the zone of the lower generatrix of the casing, where there is the least amount of gas released from the fluid, as gas rises upward and accumulates at the upper casing string generatrix. Then there is a discharge cycle and the cycle repeats.

This pump has the same disadvantages as the previous one.

The technical task of the utility model is to increase the efficiency of the pump with a high gas content at the intake, typical for Jurassic reservoirs of oil fields in Western Siberia.

This is achieved by the fact that the borehole sucker rod pump, comprising a working pair of a plunger and a cylinder with discharge and inlet valves installed in them, respectively, and a filter at the intake.

between the pump intake and the filter, additionally installed

a hydrodynamic transducer consisting of a housing, a nozzle ending in a nozzle, a resonance plate, and a mount of a resonance plate.

In FIG. pump scheme is presented, general view.

The downhole sucker rod pump contains a working pair of the plunger 1 and cylinder 2 with the discharge 3 and the intake 4 valves installed respectively. At the inlet of the pump 5, a hydrodynamic converter 6 is installed, consisting of a pipe 7 ending with a nozzle 8, a resonance plate 9 and a fastener 10 of the resonance plate. At the reception of the hydrodynamic transducer 6, a filter 11 is installed.

The downhole sucker rod pump operates as follows:

After installing the pump in the well and the presence of pressure in front of the receiving valve 4 in the hydrodynamic transducer 6, a part of the mechanical energy of the formation fluid stream is converted into sound wave energy. The resonance plate 9 is excited by surface waves of a liquid stream through the pipe 7 and flowing out of the nozzle 8. When the eigenfrequencies of the flow and the plate coincide, resonance arises in the system. With significant amplitudes of oscillations of the plate 9, the wave reflected from it reaches the nozzle 8 and modulates the gas-liquid flow, causing it to oscillate with the oscillation frequency of the resonance plate 9.

4

F (h / bv) (Hz), where, | / is the universal coefficient;

V is the jet velocity in the plate zone; cm / sec; B-width of the nozzle, cm;

h is the distance from the slit to the edge of the plate; cm.

Using the proposed utility model for oil production from reservoirs with a high gas content and creating an emulsion gas-liquid structure will reduce the relative velocity of the gas in the liquid-gas mixture and thereby improve the working conditions of the sucker rod pump with maximum use of reservoir energy.

Literature:

1. Oilfield equipment; Handbook / Ed. E.I. Bukhalenko. - 2nd ed., Rev. and add. - M .; Nedra, 1990.-559 p .; silt

2. The certificate of authorship of the USSR, No. 1035282,

Claims (1)

A device for oil production by a sucker rod pump with a balanced drive, including a deep plunger pump with discharge and receiving ball valves, a strainer at the intake, a tubing string (tubing) located inside the casing, to which (tubing string) is attached below pump cylinder, rod string, rocking machine balancer and rocking machine, consisting of three heterogeneous mechanisms: four-link articulated mechanism, gearbox, belt drive and electric motor, characterized in that The pressure elements of the discharge and receiving ball valves are made of an elastic material, for example rubber.