Beam pumping unit remote monitoring method and system based on wireless sensor network and TD-SCDMA (Time Division-Synchronization Code Division Multiple Access)

Abstract

The invention discloses beam pumping unit remote monitoring method and system based on a wireless sensor network and a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access). The system comprises three parts of a wireless sensor network of a local scope, a TD-SCDMA public network and a beam pumping unit remote monitoring center. The wireless sensor network comprises a plurality of sensor nodes and a unique coordinator node which is also used as a ZifBee / TD-SCDMA gateway; important beam pumping unit working condition parameters are uploaded to the beam pumping unit remote monitoring center through the TD-SCDMA gateway on line in real time; general working condition parameters are temporarily stored on the coordinator node, acquired by an inspector with wireless USB acquirer in hand in fixed time and off-line aggregated to the beam pumping unit remote monitoring center; and a beam pumping unit indicator diagram (rod load and displacement relationship diagram) is obtained by adopting a cooperative work mode of indirect and direct measurement, which improves the reliability of the monitoring system. The ZigBee wireless sensor network replaces traditional complicated sensor node wiring communication, which improves the reliability of a field detection system; and moreover, the sensor node adopts an intermittent working mode with timing awakening, which saves the electric energy.

Description

technical field [0001] The invention belongs to the technical category of remote monitoring of pumping units, and in particular refers to the joint acquisition of pumping unit diagrams and on-line and off-line classification of working condition parameters by a wireless sensor network in a local area combined with TD-SCDMA public network, indirect and direct measurement methods The uploaded remote monitoring method and system for pumping units based on wireless sensor network and TD-SCDMA. Background technique [0002] In 2009, my country imported 203.79 million tons of crude oil, and its foreign dependence exceeded the 50% warning line for the first time (announcement of the National Development and Reform Commission on January 20, 2010). It is necessary to explore and develop new oil fields, but it is more effective to increase the crude oil production of existing oil wells, and the operating efficiency of pumping units is a key factor for high and stable crude oil product...

AI Technical Summary

Problems solved by technology

First of all, the wired communication mode between the working condition parameter sensor node and the parameter processing node of the pumping unit, due to the harsh environment of the oil well, the wind and the sun, and the damage of the node connection is one of the fault sources in the operation of the monitoring system; even if the sensor node is connected The line is buried underground, and the accidents of accidentally damaging the line during workover still occur from time to time

Secondly, the oilfield dynamometer chart is an important representation of the working state of the oil well. The ordinate in the dynamometer chart is the load value of the rod during the pumping process, and the abscissa is the displacement value of the rod during the up / down stroke operation; the traditional method is to use the load / The displacement sensor measures directly, but the load sensor is expensive and has a short wear life, and the reliability of the pull-wire displacement sensor is not good so far. There is no good solution; the indirect measurement of the displacement by the acceleration sensor is a good alternative, but there are cumulative errors and accuracy deviations. low defect

Third, GPRS is a 2.5G communication technology, which has been included in the planning of the Ministry of Public Information to restrict development, and the bandwidth and rate of 2.5G are low, and the cost is high, resulting in the failure of large-scale promotion and application of 2.5G data services in oil fields; therefore , the use of TD-SCDMA 3G to replace 2.5G is the inevitable technological progress, and its data service costs are much lower than 2.5G

Finally, the optimization operation of the oil well pumping unit involves a large number of working condition parameters, all uploaded in real time through the public network will bring a sharp increase in communication costs, the parameters are classified according to the importance of the working condition parameters, and the improved real-time online upload and offline collection and summary should be adopted Technology

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