Direct ground driving gear of screw pump

A driving device and screw pump technology, applied in pumps, pump control, machines/engines, etc., can solve the problems of screw pump speed adjustment difficulties, low operating safety factor, high maintenance costs, etc., to reduce daily maintenance costs and avoid safety accidents , The effect of facilitating production management

Active Publication Date: 2007-02-07
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of large power loss, difficulty in adjusting the speed of the screw pump, low operating safety factor and high maintenance cost of the existing screw pump drive device

Method used

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  • Direct ground driving gear of screw pump
  • Direct ground driving gear of screw pump
  • Direct ground driving gear of screw pump

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Experimental program
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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawing:

[0012] The purpose of the present invention is to develop a ground direct drive device for screw pumps used in oil fields. When installing, the screw pump sucker rod passes through the hollow motor shaft, and the hollow shaft power motor directly drives the screw pump sucker rod to run, and the screw pump The axial bearing device and mechanical seal device of the pump wellhead are designed in the end cover of the motor and the hollow shaft to realize the integration of axial bearing, mechanical seal and power motor. At the same time, electromagnetic braking technology is used to solve the reverse braking of the screw pump. .

[0013] Based on the above purpose, design according to the following steps:

[0014] One is to cancel the reducer and belt used for conventional screw pump transmission, the screw pump sucker rod directly passes through the hollow shaft of the power ...

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PUM

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Abstract

The invention relates to a device for directly driving the screw pump, while it is mounted on the ground, to solve the problems as large power consumption, hard rotation adjustment, and high maintenance cost, wherein it is characterized in that: changing the rotation axle of power motor of screw pump into hollow axle, to directly transmit the power via using clamper to connect the oil pump rod; the three-way oil tube for outputting oil is connected to the sealing tube of motor axle; the sealing tube and hollow axle have mechanical sealing at the end cover; the oil pump rod and axial head use coil root static sealing; the axial head and hollow motor axle use rubber ring static sealing; the lower end cover is embedded with axial taper bearing to use the upper and lower end cover bearings as radial correction bearing; the flange disc at the well open is mounted with clamp sealing device; the main power circuit of motor is parallel connected to the brake resistance. The invention controls the motor to directly drive the screw pump, with lower energy consumption and continuous speed adjustment.

Description

Technical field: [0001] The invention relates to a device applied in the technical field of oil field lifting, in particular to a device installed on the ground to directly drive a screw pump. Background technique: [0002] At present, the screw pump driving device commonly used in oil fields is composed of wellhead, power motor, belt, reducer, sucker rod sealing packing and other components. The following problems exist in the work under this driving device: 1. Adjusting the speed of the screw pump can only be done by replacing the motor pulley, which is very inconvenient, and is limited by the size of the pulley, resulting in the continuous linear adjustment of the speed of the screw pump. Two, because there are belts and speed reducers, about 20% of the power is lost in vain. 3. In the daily production management, the reducer, belt and other accessories are easily damaged, and the maintenance cost is relatively high. 4. When the speed of the screw pump is high, there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B47/02F04B49/00H02P3/18E21B43/00
Inventor 徐国民魏显峰
Owner PETROCHINA CO LTD
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