SU114716A1 - Oil pumping unit - Google Patents

Description

The invention relates to devices for pumping oil from a well and transferring it to collection points.

Devices used in offshore oil fields have a number of dry natural flaws, such as fire safety, back pressure created at the bottom when the fluid at the collection point is pumped out by its own reservoir pressure, which leads to a decrease in well production.

The proposed oil pumping device is devoid of these disadvantages, since it does not have electric motors, and a pneumatic lubricator is used as a pumping device, equipped with two non-return valves for the well inlet and outlet of fluid, as well as pneumatic instruments and devices for automatic control of the lubricator.

The oil pumping unit consists of the following main components: two lubricators, receiving and discharge valves, a level controller, an actuator, a distribution network of air ducts and measuring instruments.

FIG. 1 shows a general view of the proposed device; in fig. 2 is an automatic pneumatic control circuit.

The well production enters the gas separator, where the gas is separated from the oil. The separated gas is transported to the vacuum network, which is si1stvuyuscheyu on pro / 1sle.

The presence of a pressure regulator on the separator provides a constant pressure in the separator necessary for the normal filling of the working cylinder.

From the separator, oil enters the lubricator 2 and fills it with valve 3 of the receiving valve open. Since the filling of the lubricator occurs at atmospheric pressure, the check valve 4 of the discharge valve is closed.

After filling the lubricator to its height, the regulation number 114716 is activated.

The 5 level torus gives a pressure impulse to the upper 6 and operating 7 valves. The upper valve 6 is closed, separating the internal polo | of the lubricator with the atmosphere, the check valve 4 is also closed, and the working valve 7 is opened and injects compressed air into the cylinder cavity, under the action of which the liquid is squeezed into flow line 8.

After the level is reduced to a predetermined value, the level regulator is activated, closes the operating valve 7 and relieves pressure from the diaphragm head of the upper valve 6. This stops the access of compressed air to the lubricator, but the liquid displacement continues under the pressure difference in the lubricator and discharge line.

When the pressure inside the lubricator is compared with the pressure for which the spring of the upper valve 6 is designed, the latter opens and releases air from the lubricator to the atmosphere. At this time, the backflow valve 4 is closed by the backpressure, and the valve 3 opens access of the liquid to the lubricator. This ends the full working cycle of the device.

The principle of operation of the lubricator 9, which serves to measure the productivity of wells, is similar to the principle of operation of the working lubricator. Measuring the lubricator can be made as a group measurement by opening the valve 10 and closing the valve 11, as well as individual measurements, sent squalvesin products not to the separator, but to the lubricator.

By starting the valve of the upper valve 6 with a rev counter, you can count the number of cycles of operation of the device.

Subject invention

A device for pumping oil from offshore oilfield well pads, characterized in that, in order to reduce backpressure at the wellhead, after the gas separator, a pneumatic lubricator equipped with two check valves for inlet and outlet of the well fluid is used as a pumping device a remote level tory torus with a cylindrical float controlled by two diaphragm valves, one of which is mounted on the upper bottom of the lubricator and serves to communicate or disconnect the inner polo the second is installed on the air line and serves to periodically intake compressed air into the lubricator, in order to force the well fluid out of it into the injection line.

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