SU1323743A2 - Well sucker-rod pump - Google Patents

Abstract

The invention relates to an oil production tank and permits an increase in pump performance and durability when pumping emulsion oils and gas-liquid mixtures. Under the main suction valve 3 of cylinder 2 at a distance of 0.2-0.8 of the stroke length of the plunger 4, an additional suction valve 6 is installed. At the same time, a separate selection of water and oil (oil and gas mixture) is provided through the corresponding channels when the oil is watering About up to 80%. 1 il. (L oo y oo 4 00 N i T iSsss iii sss -r

Description

The invention relates to a technique for oil production, in particular, to deep well sucker-rod pumps, and can be used in the oil industry to extract emulsion oils and gas-liquid mixtures from wells.

The purpose of the invention is to increase productivity and durability.

The drawing is a schematic representation of a submersible sucker rod pump, obp.1, its form.

The submersible sucker-rod pump comprises a housing 1 with a cylinder 2 and a main suction valve, and a valve 3 mounted in the housing above the lower end of the cylinder 2 by the amount of dead space. In the cavity of the cylinder: 2 there is a plunger 4 with a supercharger; M valve 5. In addition, cylinder 2 is equipped with an additional suction valve 6 installed under the main suction valve 3 located on the outer top of the body 1 of cylinder 2 in such a way that free passage of the plunger 4 to the additional suction valve 6. On the side of the lower end of the cylinder 2, the shank 7 is placed. The additional suction valve 6 is installed below the main one at a distance of 0.2-0.8 of the plunger stroke length. The specified distance between the upper main suction valve 3 and the lower additional suction valve 6 provides separate extraction of water and oil (oil and gas mixture) through the appropriate channels (not shown) with oil content from 0 to 80%, each of the suction valves can be equipped one or more valve assemblies.

The submersible sucker-rod pump is installed in the well (not shown) so that the main suction valve 3 is above the level of the oil-water contact line in the reservoir, and the intake of the shank 7 is below this level.

Deep sucker rod pump works as follows.

When the plunger 4 is in its lowest position, the pressure below it corresponds to the pressure at the pump outlet, while the discharge valve 5 is still open, and the main 3 and the additional 6 suction valves are closed. Under the plunger at this point is the reservoir water.

As the plunger 4 moves upward, the discharge valve 5 closes and the pressure in the working chamber (not indicated) of cylinder 2 begins to decrease. At the moment of equality of pressures in the cylinder 2 and at the inlet of the additional suction valve 6 after 10

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The scientific research institute opens and water from the shank 7 enters the cavity. As the pump cylinder continues until the end of the plunger 4 n of the main suction valve, the main valve 3 opens, and the additional valve 6 closes, so that in cylinder 2 it increases at the intake of the main valve body 3. At the same time, oil or gas from the annular space begins to flow into the cylinder. The pressure at the main suction valve is higher at that, due to the liner 7 and the well space extracted with different densities.

The annulus enters the cylinder 2 through the annulus until the plunger 4 does not reach the upper position. In the upper part of cylinder 2, with oil or oil and gas mixture, part of it will be filled with water. Whether water and oil passes, oil is introduced into the working chamber 2 of the pump. The volume of water, filled with the new part of the cylinder, is equal to the well that has arrived at the bottom of the well and the pump operation cycle This corresponds to the selection and inflow of fluid by fitting the plunger 4, i.e., the distance from the lower sub-valve of the suction valve 6 to its lowest position

When the plunger 4 moves in the main suction tank, the valve is 3 seconds and the pressure in the cylinder 2 is applied. At the moment of equality g and under the plunger 4 opens the valve 5 and oil and gas oil) flows from the cylinder 2 pipe (not shown). This process takes place until the plunger does not have a line of separation of oil and water. Later, when mixed, water flows down into the pump tubes.

Claims (2)

Invention Formula Submersible sucker-rod pump No. 545769, characterized in that, in order to increase productivity when pumping emulsion and gas-liquid mixtures, the cylin is an additional suction installed under the main 0.2-0.8 stroke length of the plunger. Compiled by E. Ginsburg Tehred I. Veres Corrector A. Zimokosov Circulation 574Subscribe VNIIPI State Committee of the USSR but to the deans of inventions and discoveries  113035, Moscow, Zh-35. Raushsk nab., 4/5 Production and printing enterprise, Uzhgorod, st. Project, 4 four Editor L. Veselovska Order 2946/38 five 0 five 0 five 0 five 0 The SRI opens and water from the shank 7 enters the cavity of the cylinder 2. Water continues to flow into the pump cylinder until the end of the plunger 4 reaches the main suction valve 3. At this point, the main suction valve 3 opens and the additional suction valve 6 closes, since the pressure in cylinder 2 rises to the pressure value at the intake of the main suction valve 3. At the same time, oil or oil and gas mixture from the annulus of the well begins to flow into the cylinder 2 of the pump. The higher pressure at the reception of the upper main suction valve 3 is due to the fact that fluids with different densities are extracted through the shank 7 and the annular space of the well. The flow into the cylinder 2 of the production from the annulus continues until the plunger 4 reaches the extreme upper position. At this point, the upper part of cylinder 2 will be filled with oil or oil and gas mixture, and its lower part - filled with water. The line of separation of water and oil passes in the place where oil is introduced into the working chamber of the cylinder 2 of the pump. The volume of water that filled the lower part of the cylinder is equal to the volume of water that arrived at the bottom of the well in one pump operation cycle. This correspondence between withdrawal and inflow of fluid is achieved by fitting the plunger 4, i.e., adjusting the distance from the lower supplementary suction valve 6 to plunger 4 at its lowest position. When the plunger 4 moves downward, the upper main suction r. Valve 3 is closed and the pressure in the cylinder 2 begins to rise. At the moment of equality of the pressures above and below the plunger 4, the discharge valve 5 opens and the oil and gas mixture (or oil) flows from cylinder 2 to the pump tubes (not shown). This process continues until the plunger does not reach the oil / water separation line in the cylinder. 2. Subsequently, when the plunger 4 is mixed, reservoir water flows down into the pump tubes. Invention Formula Submersible sucker rod pump aut. St. No. 545769, characterized in that, in order to increase productivity and durability when pumping emulsion oils and gas-liquid mixtures, the cylinder is provided with an additional suction valve installed below the main valve