Method for calculating liquid output of oil pumping unit through active power difference

A technology for active power and difference calculation, applied in measurement, earthwork drilling, wellbore/well components, etc., can solve problems such as difficult maintenance, low test accuracy, and high price, and achieve the goal of avoiding environmental interference, mature equipment technology, cheap effect

Active Publication Date: 2016-10-26
大庆恒通电子有限公司
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the calculation method, the effective power calculation method is difficult to calculate the friction force, which can only be judged according to experience, and there are large errors that are difficult to correct; while the effective stroke method involves some uncertain coefficients in the process of power map conversion, such as damping coefficients, etc. etc., freq

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for calculating liquid output of oil pumping unit through active power difference
  • Method for calculating liquid output of oil pumping unit through active power difference
  • Method for calculating liquid output of oil pumping unit through active power difference

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Below in conjunction with accompanying drawing, a kind of method that utilizes active power difference of the present invention to calculate the liquid production rate of pumping unit is further explained:

[0021] When there is no major change in the well conditions, it can be considered that the work done by the counterweight of the pumping unit, the work done by the friction force, the work done by the self-weight of the sucker rod, the work done by the inertial force, the work done by the wellhead back pressure, the mechanical efficiency and the motor efficiency are all important factors in the collection of active power. The time of curve II is the same as that of collecting active power curve I. Then, through the derivation process of the following formula, it can be obtained that the area integral of the downstroke active power versus time in the active power curve II is subtracted from the area integral of the downstroke active power versus time in the active pow...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for calculating the liquid output of an oil pumping unit through the active power difference and relates to a flow measurement method. The area integral of the down stroke active power in an active power curve I to time is subtracted from the area integral of the down stroke active power in an active power curve II to time, and the area integral difference is obtained. The area integral difference corresponds to an actual filling degree difference of the oil pumping unit, and then the stroke frequency liquid output II corresponding to the active power curve II can be worked out according to the stroke frequency liquid output I, measured actually, of the active power curve I. Then the stroke frequency liquid outputs II corresponding to all the active power curves II are accumulated according to time, and the total daily liquid output, the total monthly liquid output and the total yearly liquid output can be worked out. According to the method, the difference method is adopted for calculation, frequent correction is not needed, and an operator just need to conduct correction after large change of the well condition happens. A correction method is simple, and the accuracy rate is high.

Description

technical field [0001] The invention relates to a flow measurement method, in particular to a method for calculating the liquid production rate of an oil pumping unit by using the active power difference. Background technique [0002] At present, there are two main methods of fluid production measurement in pumping wells: direct measurement and indirect measurement. [0003] Direct measurement is to measure the liquid production within a fixed time, mainly including flow meter measurement and storage tank measurement: [0004] Flowmeter measurement requires the laying of pipelines for every well, the installation of flowmeters, and the construction of metering rooms in the well area. The construction cost is expensive. If the oil wells are too scattered, then the small station measurement cannot be used. The flowmeters used for measurement are commonly used for target flowmeters, multiphase flowmeters and other flowmeters. Among them, the price of target flowmeters is relat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E21B47/008E21B47/00
CPCE21B47/00E21B47/008
Inventor 马嘉冀栾宇侯兆锋倪长鹏
Owner 大庆恒通电子有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap