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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 only suitable for oil wells with medium and high liquid production, large displacement and low head, and provide a small displacement High lift reciprocating electric submersible pump

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

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specific Embodiment approach 1

[0005] Specific implementation mode one: (see figure 1 ) This embodiment consists of tubing 1, casing 2, plunger pump 4, motor 5, centralizer or tubing anchor 6, wellhead 7, cable 8, frequency conversion speed control device 9; wellhead 7 is fixed on casing 2 The upper end of the oil pipe 1 is set in the casing 2, the upper end of the oil pipe 1 is fixedly connected with the lower end of the wellhead 7, the outlet end of the plunger type oil well pump 4 is fixedly connected with the lower end of the oil pipe 1, and the lower end of the plunger type oil well pump 4 is connected with the lower end of the wellhead 7. 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 with the upper end of the centralizer or the oil pipe anchor 6 fixed in the casing 2, one end of the cable 8 is connected with the terminal of the motor 5, and the cable 8 The other end is connected with the frequency conversion speed regulation cont...

specific Embodiment approach 2

[0006] Specific implementation mode two: (see figure 1 ) The difference between this embodiment and the first embodiment is that an oil drainer 3 is fixed inside the oil pipe 1 . Other compositions and connections are the same as in the first embodiment. The function of the drainer 3 is to put in tools to open the channel of the drainer during the secondary construction operation, so that the annular space between the oil pipe and the casing is connected, and the oil pipe is replaced with clean water or replacement fluid to make the oil in the oil pipe It enters the annular space of the oil pipe and the casing during operation, so that the oil pollution is not brought to the ground, and the construction is safe and environmentally friendly.

specific Embodiment approach 3

[0007] Specific implementation mode 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, and the upper end of the flexible rope 11-1 and the small-diameter pipe 11-2 is fixedly connected with 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 type oil well 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. Other compositions and connections 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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