SU1731987A1 - System for remote dynamometer testing of deep pumps - Google Patents

Abstract

Usage: in oil production, in particular, to devices intended for automatic diagnostics of a well pumping unit during its operation. SUMMARY OF THE INVENTION: The system for pumping depth metering of submersible pumps comprises controlled 1 and receiving 2 points connected by a communication channel 3. The controlled item 1 includes a force sensor 4 and a position sensor 5 installed at each deep-well pumping installation. Receiving point 2 contains a dynamogram registrar unit in the form of a selector 7 for separating the force and stroke measurement channels and an additional block 13 of adaptive oscillations consisting of a polished rod period measurement unit 14 for measuring the stroke of the polished rod, the generator 15 of sinusoidal oscillations and the integrator 16, with this block input 14 measure the stroke of the polished rod connected to the communication channel 3 with the outputs of the 5 position sensors, and the output of the integrator 16 is connected to the input of the recorder unit of the dynamograms, to the second input orogo outputs connected effort sensors 4, wherein the position sensors 5 are in the form of reed switches. 1 hp ff, 1 ill. cl

Description

The invention relates to oil production, in particular, to devices for automatically diagnosing the state of a downhole sucker-rod pumping unit during its operation.

The purpose of the invention is to improve the quality of diagnostics of the operation of submersible pumps by eliminating the influence of the drive of the submersible pump on the formation of a dynamogram while at the same time increasing the operational reliability of the system.

The drawing shows a functional block diagram of a teledynamometer system for submersible pumps.

The system of teledinometric gauging of submersible pumps contains controlled 1 and receiving 2 points connected by channel 3 of communication. At controlled point 1 on

For each downhole pump installation, a force sensor 4 and a position sensor 5 are installed, the outputs of which are connected via the switch 6 to the input of the communication channel 3. Receiving point 2 includes a dynamogram registrar unit in the form of a selector 7 for separating the force measurement and stroke channels, the force measurement receiving paths 8 and the stroke 9, the scaling unit 10, the selection unit 11 and the specialized computing device 12 and the adapting oscillation unit 13 consisting of connected by block 14 measure the period of the polished rod, the generator 15 sinusoidal oscillations and the integrator 16. The output of the communication channel 3 through the selector 7 is connected to the corresponding inputs of the paths

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measurement of force 8 and stroke 9 of the dynamogram recorder block. The output of the force measurement path 8 is connected to one of the inputs of the scaling unit 10, and the output of the stroke measurement path 9 is connected to the input of the stroke period measurement unit 14 of the polished rod, the output of which is connected to the input of the sinusoidal oscillator 15, the output of which is connected to the integrator input 16, the output of which is connected to another input of the scaling unit 10. The output of the scaling unit 10 is connected to the input of the selection unit 11, the output of which is connected to a specialized computing device 12. The position sensors 5 are made, for example, in the form of reed switches.

The system for teledinometric deep well pumps works as follows.

The force applied to the polished rod of the pumping unit is converted by the force sensor 4 into modulated signals, which are transmitted by the switch 6 to the communication channel 3. At the receiving point 2, these signals are transmitted by the selector 7 to the receiving path 8, measurements of the force, from where they are transmitted to the scaling unit 10. When the boom suspension point passes through the extreme position, the position sensor 5 transmits the modulated signals about the beginning of the stroke and the stroke period of the polished rod using the switch 6 to the communication channel 3, where these signals are received by the selector 7 into the receiving path 9 of measuring the stroke and then - the input of the unit 14 for measuring the stroke period of the polished rod of the unit 13 of adapting oscillations. In block 14, a time value T is recorded between two incoming signals on the end positions. This time is proportional to the double stroke time of the polished rod when one sensor 5 is installed, or proportional to the single stroke time when two sensors 5 are installed (one in the lowest position and the other in the extreme position). The signal from block 14 is fed to the input of the generator 15 of sinusoidal oscillations, which produces sinusoidal oscillations with a period AND equal to the period specified by block 14 for measuring the period of the stroke of the polished rod of the pumping unit. At the output of generator 15, a signal appears that is proportional to the speed V of movement of the polished rod. After integrating this signal, an integrator 16 at its output appears a signal proportional to the path S traveled by the polished rod-rocking rod in reciprocating motion. Thus, the adaptive oscillation unit 13 generates signals proportional to the time T, the speed V and the movement path S of the polished rod of the pump unit in two ways, coming from the position sensor 5: at the beginning of the stroke and the period of the polished rod, and the law of motion is clean Sine waves are formed by a block 13 of adaptive oscillations. In this case, the block 13 adapts to the parameters T, V and S with the connection of each downhole pumping installation. To do this, for each pumping installation it is necessary to install, along with the 4 force sensor, the 5 position sensor (reed switch) in the most convenient place for operating the pump installation, for example, a magnet - on the crank of the pumping unit, and a reed switch - on the frame of the pumping unit. The signals from the adaptive oscillation unit 13 are fed to the scaling unit 10, to the other input of which signals from the force measurement path 8 are received. In the scaling unit 10, signals from both the force measurement path 8 and stroke 9 lead to a single action time and a single maximum amplitude of the section of constant load , to eliminate the effect of individual differences in the technological equipment of wells. The signal from scaling unit 10 goes to feature selection unit 11 and then to specialized computing device 12, where force-time, force-speed, force-path and other dependences are recorded, which determine the technological and technical parameters of depth-pumping units and their equipment.

Claims (2)

Claim 1. Teledating system of deep-well pumps, comprising a controlled item including sensors of force and stroke of a polished rod installed at each pumping unit and a switch, and a receiving point including a dynamometer card recorder unit in the form of a selector for channel separation, receiving tracks for measuring force and stroke , a scaling unit, a selector unit and a computing device, while the controlled and receiving points are connected by a communication channel, the input of which is connected via switch to the outputs of the force and stroke sensors, and its output through the selector to the corresponding inputs of the paths for measuring the force and stroke of the dynamogram recorder block, in order to improve the quality of diagnostics of the operation of the deep well pumps by eliminating the effect of the drive of the deep well pump on forming a dynamogram with a simultaneous increase in the operational reliability of the system, a block of adaptable vibrations is additionally introduced at the receiving point, made of series-connected blocks measured and the stroke of the polished rod, a generator of sinusoidal oscillations and an integrator, while the input and output unit adaptive vibrations are connected respectively to the output of the path for measuring the stroke of the polished rod and the input of the scaling unit, and the sensors for the stroke of the polished rod are made in the form of position sensors. 2. The system according to claim 1, characterized in that the position sensors are made in the form of reed switches.