Unbalanced Pump Research Articles

EVALUATION OF THE ENERGY EFFICIENCY OF THE NEW CONSTRUCTIVE SOLUTION OF SUCKER-ROD PUMP

As is known, in our country, oil production is carried out both in the Caspian Sea and in oil fields on land. For the mechanized exploitation of oil fields on land, in most cases used different type of sucker-rod pumps. The main object of the study of the article is a new constructive solution of the pumping unit, the novelty of which is approved by the ownership certificates of the Eurasian Patent Organization and the Intellectual Property Organization of the Republic of Azerbaijan. The main factor characterizing the operation of pumping units is its quality indicators such as metal consumption, reliability, efficiency and energy consumption. When switching from a balanced sucker-rod pumping unit to an unbalanced the efficiency factor decreases from 0.834 to 0.65 and decreases from 0.605 to 0.312. In this case, power losses increase sharply not only in transmissions, but also in energy distribution networks. If the engine is not fully loaded or is not selected correctly, then these energy coefficients decrease even more. The selection of engine power is performed according to the worst conditions, i.e. the cyclic mode of operation of an unbalanced pumping unit. Despite this, it can be said that in almost all oil fields, the power of asynchronous motors is greatly exaggerated, which causes additional losses. In article proposed expressions for determining the optimal power of the electric motor were proposed, taking into account the efficiency factor of the balancing device during the balancing of the proposed new constructive solution of the beamless pumping unit with a combined, movable counter weights and rotary counter weights. This allows to prevent excess energy consumption and reduce energy costs. Which is very important in the era of globalization, when energy prices are rising sharply.

EVALUATION OF THE ENERGY EFFICIENCY OF THE NEW MODEL OF SUCKER-ROD PUMPING UNIT

As is known, in world, oil production is carried out both in the sea and in oil fields on land. For the mechanized exploitation of oil fields on land, in most cases used different type of sucker-rod pumps. The main object of the study of the article is a new constructive solution of the pumping unit, the novelty of which is approved by the ownership certificates. The main factor characterizing the operation of pumping units is its quality indicators such as metal consumption, reliability, efficiency and energy consumption. When switching from a balanced sucker-rod pumping unit to an unbalanced the efficiency factor decreases from 0.834 to 0.65 and the operating power factor decreases from 0.605 to 0.312. In this case, power losses increase sharply not only in transmissions, but also in energy distribution networks. If the engine is not fully loaded or is not selected correctly, then these energy coefficients decrease even more. The selection of engine power is performed according to the worst conditions, i.e. the cyclic mode of operation of an unbalanced pumping unit. Despite this, it can be said that in almost all oil fields, the power of asynchronous motors is greatly exaggerated, which causes additional losses. In article proposed expressions for determining the optimal power of the electric motor were proposed, taking into account the efficiency factor of the balancing device during the balancing of the proposed new constructive solution of the beamless pumping unit with a combined, movable counter weights and rotary counter weights. This allows to prevent excess energy consumption and reduce energy costs. Which is very important in the era of globalization, when energy prices are rising sharply.

Unbalanced pump detection using modified transfer path analysis

Unbalance is the term in a rotating machine that used for a mass distribution which is not rotationally symmetric. Vibration from unbalancing pump affects to other pumps located on the same single base frame due to transmissibility. However, the unbalanced vibration can disturb and give a negative impact to other pumps on the same base frame. Therefore it is important to detect unbalance pump early which transmitted through the base frame because it can save large amounts of money. The aim of this research is evaluating the modification of transfer path analysis method that applied as a detecting pump damage method compare to International Standard. In this research, Modified Transfer Path Analysis (MTPA) is equal to the operational force that found by convolution of the natural frequencies with operational acceleration. The value of natural frequencies are determined using experimental modal analysis and the value of operational acceleration is determined by measuring the acceleration when the vibration source (pump machine) is running on steady condition. ISO 13373-1 was used as the reference for damage detection on the pump system. The results show that MTPA has the same characteristics and in agreement with ISO 13373-1 in detecting unbalance pump condition for machinery condition monitoring. Unbalance is the term in a rotating machine that used for a mass distribution which is not rotationally symmetric. Vibration from unbalancing pump affects to other pumps located on the same single base frame due to transmissibility. However, the unbalanced vibration can disturb and give a negative impact to other pumps on the same base frame. Therefore it is important to detect unbalance pump early which transmitted through the base frame because it can save large amounts of money. The aim of this research is evaluating the modification of transfer path analysis method that applied as a detecting pump damage method compare to International Standard. In this research, Modified Transfer Path Analysis (MTPA) is equal to the operational force that found by convolution of the natural frequencies with operational acceleration. The value of natural frequencies are determined using experimental modal analysis and the value of operational acceleration is determined by measuring the acceleration when the vibratio...

Ultra-low noise dual-frequency VECSEL at telecom wavelength using fully correlated pumping.

An ultra-low intensity and beatnote phase noise dual-frequency vertical-external-cavity surface-emitting laser is built at telecom wavelength. The pump laser is realized by polarization combining two single-mode fibered laser diodes in a single-mode fiber, leading to a 100% in-phase correlation of the pump noises for the two modes. The relative intensity noise is lower than -140 dB/Hz, and the beatnote phase noise is suppressed by 30dB, getting close to the spontaneous emission limit. The role of the imperfect cancellation of the thermal effect resulting from unbalanced pumping of the two modes in the residual phase noise is evidenced.

Collective Excitations and Instability of an Optical Lattice due to Unbalanced Pumping

We solve self-consistently the coupled equations of motion for trapped particles and the field of a one-dimensional optical lattice. Optomechanical coupling creates long-range interaction between the particles, whose nature depends crucially on the relative power of the pump beams. For asymmetric pumping, traveling density wavelike collective oscillations arise in the lattice, even in the overdamped limit. By increasing the lattice size or pump asymmetry, these waves can destabilize the lattice.

Analysis of gain and noise performance of bidirectionally pumped Pr 3+ -doped fluoride fibre amplifier configurations with unbalanced pumping

Analysis of gain and noise performance of bidirectionally pumped Pr 3+ -doped fluoride fibre amplifier configurations with unbalanced pumping

Analysis of gain and noise performance of bidirectionally pumped Pr3+-doped fluoride fibre amplifier configurations with unbalanced pumping

This paper presents a numerical study of the performance of asymmetric bidirectionally pumped and reflective-type amplifier configurations in the unsaturated and saturated regions. The dependences of the optimum relative backward pump power on the fibre parameters and on the amplifier's working conditions for each configuration are analysed. This study has been made in the framework of the European Project COST 241: Characterization of Active Fibres for the Photonic Network.

Effect of Vibration on Electric-Submersible Pump Failures

Summary Electric submersible pumps (ESP's) historically have had short run lives. Their failures usually were unexplained and accepted as the norm. Because the equipment has generally been downhole, finding all the influences that shorten equipment life expectancy has been difficult. Horizontal surface installations for water injection have been made where machine operating conditions could be monitored and equipment performance analyzed. Unbalanced pump vibration has been identified as the cause of many seal problems and ultimately motor and pump failures. In fact, excessive vibration appears to be an inherent mechanical characteristic of ESP's. To illustrate the severity of this problem, this paper presents data gathered from field installations with monitoring equipment, from equipment tear-down analysis, and from statistics on ESP failure modes. Introduction ESP's have been used for more than 50 years, typically for moving large volumes of fluid where other means of artificial lift have not been feasible. Recently, the application of these pumps has expanded. It is not uncommon to use these pumps to move 500 bbl [80 m3] of fluid from less than 2,000 ft [600 m]. The industry has made great strides in improving ESP performance. Run times have improved significantly over those existing only 10 years ago. These pumps are now economically competitive with other pumping systems in many environments. A unique application of ESP technology has been in water-injection systems. Water-injection pumps often must move large volumes at high pressures. Not surprisingly, ESP's fit this criterion. Although ESP's are not a panacea for all pumping applications, these examples demonstrate the applicability of ESP technology to an increasing number of applications. Nevertheless, the significant problems that still exist with the technology must be addressed before the equipment can achieve adequately long run times for it to be widely applied. Current estimates are that ESP's are used in only about 5% of the lift applications in the petroleum industry. This leaves considerable room for further application. History and Design Before the problems with ESP's are addressed, the construction of the pumping system should be analyzed. This analysis will demonstrate the problems to be solved. The design of today's ESP's remains basically unchanged from the first pumps. The pump assembly is a slender centrifugal pump of up to hundreds of stages. The stages consist of an impeller that "floats" on a shaft. The impeller is mated with a diffuser for directing the flow between stages. The impeller/diffuser assembly is stacked inside a small-diameter tubular.