Small displacement high lift reciprocating submersible electric pump

A submersible electric pump, high-lift technology, applied in the direction of pumps, liquid variable capacity machinery, pumps with flexible working elements, etc., can solve the problems of high maintenance cost, high investment cost and narrow application range.

Inactive Publication Date: 2005-09-07
DAQING OILFIELD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high investment cost, high maintenance cost and narrow application range of existing rodless pumps, which are o

Method used

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  • Small displacement high lift reciprocating submersible electric pump
  • Small displacement high lift reciprocating submersible electric pump
  • Small displacement high lift reciprocating submersible electric pump

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0005] Specific embodiment one: (see figure 1 ) This embodiment consists of tubing 1, casing 2, plunger pump 4, electric motor 5, centralizer or tubing anchor 6, wellhead 7, cable 8, and variable frequency speed control device 9; wellhead 7 is fixed on casing 2 The upper end of the tubing 1 is set in the casing 2, the upper end of the tubing 1 is fixedly connected to the lower end of the wellhead 7, the outlet end of the plunger pump 4 is fixedly connected to the lower end of the tubing 1, and the lower end of the plunger pump 4 is connected to The upper end of the motor 5 is fixedly connected, the lower end of the stator 5-2 of the motor 5 is fixedly connected to the upper end of the centralizer or the tubing anchor 6 fixed in the casing 2, and one end of the cable 8 is connected to the terminal of the motor 5. The other end of is connected with the frequency conversion speed control device 9. Plunger pump 4 is composed of fixed valve 4-1, pump barrel 4-2, upstream moving valve ...

Example Embodiment

[0006] Specific implementation manner two: (see figure 1 ) The difference between this embodiment and the first embodiment is that an oil drain 3 is fixed in the oil pipe 1. The other composition and connection relationship are the same as in the first embodiment. The function of the drainer 3 is to open the channel of the drainer during the secondary construction operation, so that the oil pipe and the annular space of the casing can be connected, and the oil pipe is replaced with clean water or replacement liquid to make the oil in the pipe Enter the annular space of the tubing and casing during operation, so as not to bring oil pollution to the ground, and realize safe and environmentally friendly construction.

Example Embodiment

[0007] Specific implementation manner three: (see figure 2 , image 3 ) The difference between this embodiment and the first embodiment is that the oil pipe 1 is replaced by a flexible rope 11-1 and a small diameter pipe 11-2. The small diameter pipe 11-2 is arranged in the flexible rope 11-1, the upper end of the flexible rope 11-1 and the small diameter pipe 11-2 is fixedly connected to the lower end of the wellhead 7, and the flexible rope 11-1 and the small diameter pipe 11-2 The lower end is fixedly connected with the upper end of the plunger pump 4. The flexible rope 11-1 is a steel wire rope or a chain rope. The inner diameter of the small-diameter tube 11-2 is 20-50 mm. The small diameter pipe 11-2 is made of steel, iron, aluminum alloy or plastic. The other composition and connection relationship are the same as in the first embodiment.

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Abstract

The invention relates to a low cubic capacity high lift reciprocation oil hidden electric pump. The outlet end of the plunger type oil pump connects to the bottom of the oil pipe, and the bottom of the plunger type oil pump fixed to the top of the motor. The bottom of the stator of the motor is fixed on the top of centralizer or oil pipe anchor in sleeve. One end of wire is connected to the connection terminal of the motor, and the other end is connected to variable frequency speed control device. It has the advantage of decreasing the operation of the broken and abrasion of the pumping bar, decreasing the cost to maintain the oil well, and is easy to manage.

Description

Technical field: [0001] The invention relates to an improvement of the structure of an oil recovery pump, in particular to a rodless oil recovery pump. Background technique: [0002] At present, the most common lifting method for oil production in my country is mainly the rod pump lifting method composed of pumping unit, oil pipe, sucker rod and oil pump, which accounts for more than 90% of oil production wells. However, they There are many deficiencies: one is that the pumping unit needs to use intermediate links such as a reducer, a four-bar linkage, and a sucker rod to change the rotational motion of the motor into a linear motion, which has poor balance and low efficiency; Large area, large investment, and high cost; third, there are many intermediate links, many useless work, and high energy consumption. The energy consumption of oil production equipment has accounted for about 1 / 3 of the total energy consumption of the oil field; Severe grinding, serious consumption of p...

Claims

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Application Information

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IPC IPC(8): E21B43/00F04B47/06
Inventor 王林张传绪王德金刘遵权侯维前
Owner DAQING OILFIELD CO LTD
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