Flexible shaft transmission device of submersible direct-drive screw pump

A transmission device and flexible shaft technology, applied in the direction of pumps, pump components, machines/engines, etc., can solve the problems of large space occupation, rod and tube eccentric wear equipment efficiency, high cost, etc., achieve less floor space, solve rod and tube eccentricity Grinding problems and the effect of reducing maintenance costs

Active Publication Date: 2016-06-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the common problems of eccentric wear of rods and tubes in directional wells, low equipment efficiency, large space occupation and high cost

Method used

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  • Flexible shaft transmission device of submersible direct-drive screw pump

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In order to overcome the common problems of eccentric wear of rods and pipes in directional wells, low equipment efficiency, large space occupation, and high cost, this embodiment provides a method such as figure 1 The flexible shaft transmission device of the submersible direct drive screw pump shown, the transmission device includes a long connecting pipe 1, a stator connecting pipe 2 and a centralizer 3 connected sequentially from top to bottom;

[0029] The inside of the long connecting pipe 1 is sequentially connected with an upper screw connector 4, a flexible shaft 5 and a lower screw connector 6 from top to bottom;

[0030] The stator connecting pipe 2 is provided with a connecting shaft 8 inside;

[0031] The centralizer 3 is provided with a lower connecting pipe 13 inside;

[0032] The long connecting pipe 1 top is provided with a suction port, the bottom of the lower screw connecting head 6 is connected with the upper part of the connecting shaft 8 through t...

Embodiment 2

[0038] In order to overcome the common problems of eccentric wear of rods and pipes in directional wells, low equipment efficiency, large space occupation, and high cost, this embodiment provides a method such as figure 1 The shown flexible shaft transmission device of the submersible direct drive screw pump includes a screw pump, a transmission device and a motor connected sequentially from top to bottom, and the transmission device includes a long connecting pipe 1 connected sequentially from top to bottom, a stator connecting pipe 2 and a centralizer 3; the inside of the long connecting pipe 1 is sequentially connected with an upper screw connecting head 4, a flexible shaft 5 and a lower screw connecting head 6; the inside of the stator connecting pipe 2 is provided with a connecting shaft 8; The centralizer 3 is provided with a lower connecting pipe 13 inside; the upper part of the long connecting pipe 1 is provided with a suction port, the lower part of the lower screw con...

Embodiment 3

[0041] In order to overcome the common problems of eccentric wear of rods and pipes in directional wells, low equipment efficiency, large space occupation, and high cost, this embodiment provides a method such as figure 1 The shown flexible shaft transmission device of the submersible direct drive screw pump includes a screw pump, a transmission device and a motor connected sequentially from top to bottom, and the transmission device includes a long connecting pipe 1 connected sequentially from top to bottom, a stator connecting pipe 2 and a centralizer 3; the inside of the long connecting pipe 1 is sequentially connected with an upper screw connecting head 4, a flexible shaft 5 and a lower screw connecting head 6; the inside of the stator connecting pipe 2 is provided with a connecting shaft 8; The centralizer 3 is provided with a lower connecting pipe 13 inside; the upper part of the long connecting pipe 1 is provided with a suction port, the lower part of the lower screw con...

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PUM

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Abstract

The invention provides a flexible shaft transmission device of a submersible direct-drive screw pump. The transmission device comprises a long connection pipe, a stator connection pipe and a straightening device which are sequentially connected from top to bottom; an upper screw connector, a flexible shaft and a lower screw connector are sequentially connected in the long connection pipe from top to bottom; and a connection shaft is arranged in the stator connection pipe; and a lower connection pipe is arranged in the straightening device. The flexible shaft transmission device is simple in structure, only a control cabinet is arranged on the ground part of the system, the occupied area of a well mouth is small, the ubiquitous problem that eccentric abrasion happens to a rod and a pipe of a directional well is fundamentally solved, and later-period running and maintaining cost and labor intensity are reduced.

Description

technical field [0001] The invention relates to the research field of oil well mechanical oil extraction equipment, in particular to a flexible shaft transmission device of a submersible direct-drive screw pump. Background technique [0002] The submersible direct-drive screw pump is to lower the submersible direct-drive screw pump unit into the well, and use the power cable to transmit the power to the downhole submersible motor. The motor directly drives the screw pump rotor to rotate through the flexible coupling, and the well fluid increases through the screw pump. Then, it was lifted to the ground. "Direct drive", that is, the mechanical deceleration device is canceled, the rotor of the screw pump is directly driven by the submersible motor, and the speed is reduced by ground frequency conversion equipment. [0003] The submersible direct drive screw pump is composed of AC servo permanent magnet synchronous motor, protector, motion conversion device, screw pump, contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C15/00F04C13/00
CPCF04C13/008F04C15/0061
Inventor 辛宏甘庆明陆梅黄伟韩二涛李大建刘涛张岩郭靖张磊杨海涛呼苏娟魏韦
Owner PETROCHINA CO LTD
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