SU1291721A1 - Well sucker-rod pumping unit - Google Patents

Abstract

The invention relates to a technique for the extraction of oil and M. b. used in pumping from wells in viscous structure-forming, their reservoir fluids. The invention allows to increase the efficiency of the installation. The installation contains a sucker-rod pump 2 mounted on the column of pumping pipes. The plunger 3 of the latter is connected to the column of pumping rods 4 and placed in the cylinder (C) 5. The latter in its lower part is connected by means of a spring-loaded non-return valve (K) 7 to the annular space 6 As the pressure increases in C 5, C 7 opens and some of the fluid from pipes 1 and C 5 through the cavity of plunger 3 is discharged into the annulus 6 of the well. This makes it possible to reduce the hydrodynamic resistance to the movement of the string of pump rods during the course of the latter downward and thereby avoid its "hanging. After the destruction of the structure of the oil, the K 7 closes and the oil is pumped to the flow line. 1 il. i cl

Description

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The invention relates to a technique for oil production, in particular, to well pumping sump units, and can be used in the oil industry when pumping from a well, viscous, structure-forming formation fluids and oil-water emulsions.

The purpose of the invention is to increase efficiency.

The drawing shows schematically

However, with increasing pressure in the cylinder 5 of the shtangovogo pump 2, an additionally installed spring-loaded valve 7 in the lower part of the cylinder opens and part of the liquid from the tubing string 1 and the cylinder 5 of the sucker rod pump through the cavity of the plunger 3 with the open discharge valve (not indicated) is discharged into the annulus 6 wells. Removing a part of the liquid from the pump string

The well bore pumping installation of pipes and the pump cylinder allows reducing the overall appearance of the structure-forming formation fluids for pumping.

The well sucker pump unit contains a sucker-rod pump 2 mounted on the column of pumping pipes I, the plunger 5 of the jury 3 of which is connected to the column of pumping rods 4 and is located in the cylinder 5 connected in its lower part with the annular space 6 of the well (not indicated). The connection of the lower part of the cylinder 5 with behind the tube space 6 is made in the form of an additionally installed spring-loaded non-return valve 7 in the lower part of the cylinder.

The installation works as follows.

After turning on the drive of the machine-pump of the installation (not marked), the pump string (;; the rods 4) begin to reciprocate. In this case, there is a high-viscosity fluid in the column of pumping tubes 1, since during the simple installation of the viscosity liquids increase significantly due to the formation of a structure.When the pumping string shtang 4 moves downward under the action of hydrodynamic resistance forces in the cylinder 5 of the sucker-rod pump 2, the pressure starts to increase and conditions appear for the pump string to hang. ng 4, i.e. the top of the movement of the rod string at a greater rate relative to the rate of motion of its bottom part, while the load on the head of the balancer 40 pumping unit is reduced to zero, and for the occurrence of shock loads. Od30

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hydrometric resistance to the movement of the column of pump rods when the latter is running downward, and, thereby, to avoid its "hanging."

As the pump rod 4 is completed in a reciprocating motion, the liquid in the column of pump pipe I decreases its viscosity due to the destruction of the viscous structure. The pressure in the cylinder 5 of the sucker-rod pump 2 as the forces of hydrodynamic resistance to the movement of the string of the pump rods 4 decreases gradually. As a result of this, the check valve 7 additionally installed in the lower part of the cylinder 5 is closed by the action of a spring (not indicated) and the pump unit starts operating in a normal solution until it stops.

Claims (1)

Invention Formula A well pumping unit for pumping structure-forming reservoir fluids containing a shtung pump mounted on a column of pumping pipes, the plunger of which is connected to the column of pumping rods and placed in a cylinder connected in its lower part with the annulus of the well, characterized by In order to increase efficiency, the connection of the lower part of the cylinder with the annular space is made in the form of a spring-loaded non-return valve additionally installed in the lower part of the cylinder. However, with increasing pressure in the cylinder 5 of the shtangovogo pump 2, an additionally installed spring-loaded valve 7 in the lower part of the cylinder opens and part of the liquid from the tubing string 1 and the cylinder 5 of the sucker rod pump through the cavity of the plunger 3 with the open discharge valve (not indicated) is discharged into the annulus 6 wells. Removing a part of the liquid from the pump string pipes and cylinder allows to reduce hydrometric resistance to the movement of the column of pump rods when the latter is running downward, and, thereby, to avoid its "hanging." As the pump rod 4 is completed in a reciprocating motion, the liquid in the column of pump pipe I decreases its viscosity due to the destruction of the viscous structure. The pressure in the cylinder 5 of the sucker-rod pump 2 as the forces of hydrodynamic resistance to the movement of the string of the pump rods 4 decreases gradually. As a result of this, the check valve 7 additionally installed in the lower part of the cylinder 5 is closed by the action of a spring (not indicated) and the pump unit starts operating in a normal solution until it stops. Invention Formula A well pumping unit for pumping structure-forming reservoir fluids containing a shtung pump mounted on a column of pumping pipes, the plunger of which is connected to the column of pumping rods and placed in a cylinder connected in its lower part with the annulus of the well, characterized by In order to increase efficiency, the connection of the lower part of the cylinder with the annular space is made in the form of a spring-loaded non-return valve additionally installed in the lower part of the cylinder.