RU20552U1 - PUMP INSTALLATION - Google Patents

Abstract

1. A pump installation comprising a downhole pump installed in a well on a tubing string, characterized in that it is equipped with a chamber installed below the pump, the cavity of which communicates with the tubing string of the tubing, and the bottom end is closed by a valve with a spring-loaded shutter. . The pump installation according to claim 1, characterized in that an additional resonant chamber is installed in the chamber cavity above the valve.

Description

Pump installation.

The invention relates to the field of oil production and can be used for pulsed impact on producing wells during their operation.

Known devices for pulsed impact on the bottom-hole zone of production wells I.

Their disadvantage lies in the fact that for the period of well exposure, it is necessary to decommission and refit.

Closest to the claimed technical solution is a pumping unit containing a deep plunger pump, lowered into the well on a pipe string, and a rocking machine associated with the pump rod string f 2.

A disadvantage of the known pump installation is that when it is used, it is not possible to affect the bottom-hole formation zone. For pulsed impact, the well must be converted.

The technical challenge facing the invention is to provide the possibility of a pulsed impact on the bottom-hole zone of the producing well without changing the pumping equipment.

The task is solved in that the pump installation, which contains a deep pump installed in the well on the tubing string, is equipped with a chamber installed below the pump, the cavity of which communicates with the tubing string cavity, and the lower torp is closed by a valve with a spring-loaded shutter.

M. cl / F04B 47/00

In the chamber cavity above the valve, an additional resonant chamber may be installed.

The drawing shows a diagram of a pumping unit with a deep rod pump.

The pump installation includes a sucker rod pump 1, lowered into the borehole 2 on the tubing string 3. A chamber 4 is installed below the pump 1, the cavity of which through the annular channel 5 communicates with the cavity of the tubing string 3. The lower end of the chamber 4 is closed by a valve, the shutter 6 of which is pressed to the seat 7 by the spring 8. To ensure a sharp opening, the shutter 6 is made differential.

An additional resonant chamber 9 is installed in the cavity of the chamber 4.

For washing, the chamber 4 is equipped with check valves 10 and 11, one of which is located in the body of the shutter 6, and the second in the annular partition 12 ,. on which the resonant chamber is mounted.

The installation is preferably used in wells that do not provide potential flow rates during normal operation of the pump or are prone to deterioration of the filtration characteristics of the bottom-hole formation zone during operation.

The pump is calculated based on potential well flow rates. The length of the column 3 should ensure that the camera 4 is installed as close as possible to the perforation zone.

The length (L) of the resonance chamber 9 is calculated as a half-wave vibrator for frequencies (f) 10-20 Hz and should be of the order of () 70-35 m, where C is the speed of sound.

After turning on the pump, the fluid level in the well decreases to the calculated dynamic level. Spring 8 is designed faK to hold the shutter 6 when the pump is in the specified mode.

h and shutter 6 sharply opens when the moment occurs when the inequality - pg (H + h) / 10 + P ,, P „is satisfied, where: p is the density of the medium; g is the acceleration; RP - pressure created by the spring; RC - pressure on the pump outflow. In this case, a pressure impulse propagates in the well below chamber 4, and a rarefaction impulse arises in the chamber cavity above the seat 7. The shutter 6 closes until the pressure pulse reflected by the resonant chamber 9 arrives, after which it reopens. There may be several such pulses in the chamber, depending on the properties of the medium.

During the passage of pulses, radiation of vibrational energy occurs through the walls of the chamber 4 and from its end.

Thus, the effect on the formation is carried out until the oil recovery reaches the calculated one. In this case, the liquid level rises to the calculated one and the generation of pulses ceases. If for some reason the fluid flow decreases again, the oscillatory process will resume.

Sources of information:

1. The author's certificate of the USSR No. 1719623, ЕВВ 43 / 25.1989.

2.Amirov A.D. and others. Overhaul of oil and gas wells. M., Pedra, 1975, p. 69-71, fig. 12.12.

General OJSC NPO Int || acIJ% W1 / lYVVYuMorozov

Claims (2)

1. A pump installation comprising a downhole pump installed in a well on a tubing string, characterized in that it is equipped with a chamber mounted below the pump, the cavity of which communicates with the tubing string of the tubing, and the bottom end is closed by a valve with a spring-loaded shutter. 2. The pump installation according to claim 1, characterized in that an additional resonant chamber is installed in the chamber cavity above the valve.