RU74163U1 - Borehole PUMPING PLANT FOR SIMULTANEOUS-SEPARATE OIL PRODUCTION - Google Patents

Abstract

The proposed utility model relates to the oil industry and can be used for simultaneous and separate oil production from two layers through one well. The technical result is achieved by the fact that in the known device, which includes two successive screw pumps with articulated worm shafts, a packer with a nozzle separating the lower and upper layers, inlet openings for receiving production of the upper layer are made between the two pump bodies, the lower pump housing is connected with a plunger, and the packer pipe is connected to a cylinder forming an airtight friction pair with a plunger. Figure 1

Description

The proposed utility model relates to the oil industry and can be used for simultaneous and separate oil production from two layers through one well.

Known pumping units for simultaneous and separate oil production from two reservoirs using an electric centrifugal pump (RF patent No. 2282759, op. August 27, 2006). The disadvantage of this device is the inability to use circuits for operating wells with screw pumps, which have a number of advantages compared to a given pump .

Closest to the proposed utility model is a downhole pumping unit for oil production and water injection into the reservoir (RF patent No. 2284410, op. 10.11.2005), which uses screw pumps driven by a rotating rod string. The disadvantage of the installation is the impossibility of simultaneous and separate oil production from two layers.

The purpose of the utility model is to provide the possibility of simultaneous-separate oil production from two layers.

This goal is achieved by the fact that in the known device, including two sequentially located screw pumps with worm shafts connected to each other, a packer with a nozzle separating the lower and upper layers, inlet openings for receiving products of the upper layer are made between the two pump casings, the lower pump housing is connected with a plunger, and the packer pipe is connected to a cylinder forming an airtight friction pair with a plunger.

Figure 1 presents a diagram of the proposed device. The upper 2 and lower 3 screw pumps are lowered into the well 1, the worm shafts of which 4 and 5 are connected to each other so that the rotation of the rod string 6 is transmitted to both shafts. In this case, the flow rate of the upper pump exceeds the flow rate of the lower one. The upper pump housing is connected to the tubing string 7. A plunger 8 is connected to the end of the lower pump, which enters the cylinder 9, ending in the lower part with a pipe 10, which tightly passes through the packer 11, installed between the upper I and lower II layers. At the junction of the pump housings 2 and 3, holes 12 are made, communicating the over-packer zone of the well with the internal cavities of both pumps.

The operation of the installation is as follows. At the beginning, a packer 11 with an installed cylinder 9 of a sliding pair descends into the well. Next, the installation descends into the well on the pipe string 7, which, with its plunger 8, enters the cylinder 9. After the installation is turned on, the rotation of the rod string 6 is transmitted to the worm shafts 4 and 5. while the liquid from the lower reservoir II will be pumped out by the lower pump 3 to receive the upper pump. The liquid of the upper reservoir I will also be supplied to the intake of the upper pump 2 through the holes 12 due to its greater productivity. Thus, the upper pump 2 will pump out the fluid of both layers through pipes 7 to the wellhead.

The presence of a sliding pair of 8 and 9 allows you to remove axial loads on the pump housings 2 and 3, as well as on the packer 11 to avoid its depressurization. Installation allows to achieve high reliability in operation, ease of execution and manufacturability.

Claims (1)

A downhole screw pump installation for simultaneous and separate oil production, including two successive screw pumps with worm shafts articulated between each other, a packer with a nozzle separating the lower and upper layers, characterized in that inlet openings for receiving products of the upper layer are made between two pump bodies, the lower pump housing is connected to the plunger, and the packer pipe is connected to a cylinder forming a tight friction pair with the plunger.