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Control system of pumping system

A control system and oil pumping technology, which is applied to the automatic control system of drilling, production fluid, drilling equipment, etc., can solve the problems of low motor efficiency and power factor, low motor speed, low efficiency, etc., and achieve high power density and output Great power and high efficiency

Inactive Publication Date: 2010-11-03
杭州坤泽采油设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] First, when it is matched with centrifugal submersible pump, because the motor speed is lower than the synchronous speed, the motor efficiency and power factor are low
[0004] Second, when it is matched with the submersible screw pump, the speed is too high to reduce the speed to the speed suitable for the screw pump through the tachometer. Even if the reducer is used, the cost of oil production will be greatly increased and the efficiency of the system will be reduced. The frequency conversion speed control device is used to keep the motor in a low-frequency working state for a long time, and it is easy to cause the temperature rise of the motor to accelerate, causing motor failure
The system cannot realize flexible control, and the efficiency is low
[0005] Third, even if the traditional submersible electric pump system adopts frequency conversion control, its motor control cabinet is often placed on the ground. When the AC power is transmitted to the motor due to long-distance transmission, the energy loss is serious, which further reduces the efficiency of the system.
Although there is still the problem of low energy saving rate when combined with frequency conversion controller
[0007] In addition, since submersible motors are basically hundreds to thousands of meters underground, and existing submersible motors usually use AC motors, the three-phase AC power used by submersible motors will be transmitted from the ground to hundreds to several kilometers underground. Kilometers, therefore, the power loss in transmission is very large
However, the existing control system cannot solve this problem

Method used

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Examples

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Comparison scheme
Effect test

no. 1 example

[0149] Figure 19 It is an exploded schematic diagram of a position detection device with two magnetic induction elements installed according to the first embodiment of the present invention. The position detection device includes a sensing element 710, a circuit board 711, a magnetic ring 712, a stainless steel cover 713, a magnetic steel ring 715, and a housing (not shown). The magnetic steel ring 715 is installed on the motor tail shaft 716, and the rest can be Installed on the stainless steel cover 713 of the high-voltage threading seal assembly 714. The feature of this solution is that the position detection device has two magnetic induction elements, and the magnetic permeable ring 712 is also composed of two parts, one is a 1 / 4 magnetic ring and the other is a 3 / 4 magnetic ring. Two incomplete magnetic rings form two slits for use with two magnetic induction elements.

[0150] Picture 20 It is a block diagram of a signal processing device according to the first embodimen...

no. 2 example

[0200] In the second embodiment, there are two magnetic steel rings and two magnetic permeable rings, and there are two rows of magnetic induction elements. These are the key components of the position detection device. The installation and structure of other components are the same as those of the first The similarity in an embodiment will not be repeated here.

[0201] Figure 24 It is an exploded perspective view of the key components of the position detection device solution according to the second embodiment of the present invention. Figure 25 It is a schematic diagram of the installation of the position detection device solution according to the second embodiment of the present invention. The position detection device of this embodiment includes a rotor and a stator in which the rotor is sleeved. The rotor includes a first magnetic steel ring 271a and a second magnetic steel ring 271b, and a first magnetic permeable ring 205a and a second magnetic permeable ring 205b. The ...

no. 3 example

[0225] In the third embodiment, the number of components and their installation scheme are similar to those in the second embodiment, except for the magnetizing method of the magnetic steel ring and the arrangement position of the magnetic induction element.

[0226] Figure 37 It is an exploded perspective view of the position detection device according to the third embodiment. Two rows of magnetic induction elements 308 and 309 are provided corresponding to the magnetic steel ring 302 and the magnetic steel ring 303, respectively. For the convenience of description, the first column of magnetic induction elements, that is, the multiple magnetic induction elements corresponding to the magnetic steel ring 302 and the magnetic steel ring 304, are all represented by the magnetic induction element 308, and the second column of magnetic induction elements correspond to the magnetic steel ring 303 and the magnetic steel ring 303. The multiple magnetic induction elements of the ring 30...

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Abstract

The invention discloses an oil field control system which comprises a central control station and a plurality of underground submersible servodrive control subsystems communicating with the central control station, wherein each underground submersible servodrive control subsystem is connected with a production module in the well where the underground submersible servodrive control subsystem is, and the underground submersible servodrive control subsystem transmits the underground condition to the central control station according to the command and controlling parameters received from the central control station or a man machine interaction interface of the subsystem when controlling the operation of the production module. Through the invention, the operation condition of the submersible servodrive system in each well in the whole oil field can be accurately monitored and reasonably controlled by an operator, thus being favorable for improving the production efficiency and saving the operating cost.

Description

Technical field [0001] The invention relates to a control system, in particular to a control system applied to a downhole pumping system. Background technique [0002] At present, in my country and other oil-producing countries in the world, submersible motors are widely used in oil fields to drive submersible pumps to extract crude oil. The traditional submersible pump systems are mainly powered by two-pole three-phase asynchronous motors. The oil production system has the following problems in the oil production process matching: [0003] First, when matched with a centrifugal submersible pump, the motor speed is lower than the synchronous speed, and the motor efficiency and power factor are low. [0004] Second, when it is matched with a submersible screw pump, it is difficult to reduce the speed to a speed compatible with the screw pump through the tachometer if the speed is too high. Even if the reducer is used, it greatly increases the oil production cost and reduces the effici...

Claims

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Application Information

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IPC IPC(8): E21B44/00
CPCE21B43/128E21B47/008
Inventor 郝双晖郝明晖
Owner 杭州坤泽采油设备有限公司
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