Permanent Magnet Motor Safety

Nicholson, Barry; Yicon, Carlos; Harris, Dennis; Delaloye, Richard

doi:10.2118/204487-ms

Day 3 Wed, October 06, 2021 2021

DOI: 10.2118/204487-ms

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Permanent Magnet Motor Safety

Barry Nicholson

Carlos Yicon

Dennis Harris

et al.

Abstract: As Permanent Magnet Motors (PMMs) become more widely used because of their many benefits, awareness of the potential safety hazards arising from their differences from Induction Motors (IMs) is important. Due to their construction, the magnetic field presence is always "on" with PMM – even when not under energized electrical energy. PMMs are AC generators when freely rotating forward or backward. Elevated safety consciousness is needed to avoid serious injury or fatality when working with PMMs. This paper pres… Show more

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Cited by 9 publications

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Carbon Footprint Reduction Using Permanent Magnet Motors in Artificial Lift Systems

Ararat¹,

Herrera²,

Parra³

et al. 2022

Day 3 Thu, August 25, 2022

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Permanent magnet motor (PMM) technology was evaluated and implemented in the different artificial lift systems in Llanos Norte (LLN) and La Cira Infantas (LCI) fields aiming to find a more efficient motor that aligns with SierraCol Energy's mission as an independent operator in Colombia to generate energy consumption savings and contributing to reduce the carbon footprint. During the last decade, awareness has been raised about environmental issues and the need to combat the effects of climate change. Efforts led by different agreements between nations have gained strength based on the 1992 Earth Summit and the 2015 Agreement of Paris, which establishes measures for reduction of greenhouse gas emissions in order to minimize the impact of the carbon footprint in different industries strongly associated with the exploitation of fossil resources and its impact. More efficient technologies within the oil and gas sector are important since the increase in energy costs worldwide has been impacting the operating costs of mature oil and gas fields, and reservoir depletion, high water cuts, and equipment maintenance are increasing energy demands. The process of identifying new, more efficient technologies was initiated, and PMMs were selected and implemented, achieving a significant reduction in energy consumption (15% - 25%) in artificial lift systems at SierraCol Energy fields. In 2016, a trial test in LLN field began with the installation of PMM in two wells with ESP systems, with an average energy saving of 15%, based on ESP results. The trial test began in 2019 with two wells with PCP systems in LCI, obtaining 35% energy savings. These favorable energy savings resulted in a large-scale implementation in the initial completions in 2021. The last trial test for the SRP system began in 2020/2021 with the installation of five wells in LCI with an average energy saving of 18%. PMM met the expectations and objectives set for their evaluation; a 15% reduction in energy consumption has been achieved for the main artificial lift systems (ESP, SRP and PCP) with PMM technology compared to conventional systems. Savings in energy translates into a reduction of 24,500 tons CO2eq in five years; therefore, implementation of PMM technology is considered an energy efficient alternative and potential agent of change in reducing the carbon footprint. This paper shares technical details of the evaluation of new technologies and tests carried out in the field to validate the implementation of PMM technology in the artificial lift systems, the calculation of reduction of tons of CO2eq, and the main challenges in its application as an energy efficient solution for future projects.

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Carbon Footprint Reduction Using Permanent Magnet Motors in Artificial Lift Systems

Ararat¹,

Herrera²,

Parra³

et al. 2022

Day 3 Thu, August 25, 2022

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A Failsafe Method of Preventing Voltage Generation During Installation and Pulling of ESPs with Permanent Magnet Motors

Ken,

Charles,

Mauricio

et al. 2023

Day 3 Wed, October 04, 2023

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With the increased use of permanent magnet motors (PMM) versus less efficient induction motors (IM) comes an increased safety risk. While both the IM and PMM can generate power themselves if their shaft is turned by external forces, the induction motor cannot generate enough power to require additional safety procedures. The PMM when spinning at 2,000 rpm can generate up to 240 volts to create a tremendous safety risk when one considers voltage over 50 volts can be lethal. The objectives/scope of this paper is to present an alternative method of preventing the shaft of a Permanent Magnet Motor (PMM) from rotating during the install and pull process. The result of implementing this method is the creation of safer working conditions for the field technician. The alternative method presented here utilizes a mechanical lock to physically secure the shaft thereby preventing it from rotating while the lock is in place. The mechanical lock mechanism is secured to the top end of the equipment string with the lock engaged during the installation of the Electric Submersible Pump (ESP) string. Once the motor is powered, the force generated automatically unlocks the shaft to allow for the normal operation of the ESP. To engage the lock for the pulling of the ESP string, a heavy weight is lowered on top of the shaft lock. The two present methods to prevent the pump shaft from rotating while installing or pulling are shunting of the cable and plugging the production tubing. Shunting involves tying all three phases of the cable together to short circuit the electrical system. However, the potential to rotate still exists, but requires an extremely large force. Plugging the production tubing contains the fluid column's potential energy from flowing back through the ESP, but this too has its completion and operational issues. The mechanical shaft lock method described in this paper uses shear pins that physically lock the shaft to prevent it from rotating. Only the mechanical motor horsepower has enough force to shear the pins loose; downhole pressure is not enough. Utilizing a PMM mechanical lock mechanism will physically prevent the shaft from rotating while installing or pulling a PMM-ESP string to provide a failsafe method to prevent potentially fatal conditions.

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Thermal and Hydraulic Performance Testing of a Novel High Temperature ESP System for SAGD under Real Conditions

Klaczek,

Robles,

Stewart

et al. 2023

Day 3 Wed, October 04, 2023

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It has been about 10 years since High Temperature Electrical Submersible Pumps (HT ESPs) were first deployed at downhole temperatures of 250°C (482°F). Since then, these pumps have become one of the most popular forms of artificial lift for most Steam Assisted Gravity Drainage (SAGD) producers. Despite this popularity, the severity of the operating conditions in SAGD wells continues to present challenges to the development of new HT ESP technology. A Joint Industry Project (JIP) of major thermal operators commissioned this research to evaluate the performance of some novel HT ESP technology that was developed by Summit ESP a Halliburton Company. This novel HT ESP technology was specifically designed to operate in a SAGD environment. This paper describes the full-scale testing that was independently conducted by the JIP on this HT ESP technology using a specialized high temperature flow loop at C-FER. Testing was completed to better understand the performance and reliability of this novel HT ESP technology over a wide range of representative SAGD conditions. The program included several diverse tests conducted at fluid temperatures up to 250°C (482°F). This included a wide range of operating conditions, including low levels of sub cool and different multiphase fluid combinations with oil, water, gas, and steam. As noted in past experimental work conducted on HT ESPs by Waldner et al. (2012), understanding the thermal profile of the ESP system (specifically the motor) as well as the effect of multiphase flow conditions on motor heat dissipation and pump hydraulic performance when operating in a SAGD wellbore are key considerations when assessing ESP systems. For this reason, additional downhole instruments were installed to monitor the temperature profile of the ESP system in the wellbore during this test. The experimental setup also included internal pressure monitoring of the ESP motor oil volume compensation system to carefully observe the interactions between the wellbore environment and ESP system performance. This paper presents an overview of the test objectives, the experimental setup (including the instrumentation), the HT ESP system, as well as a selection of key laboratory test results. Collectively this paper provides insight into the test methodology and performance of this new HT ESP under various conditions representative of a SAGD wellbore in the field. Technical Categories: ESP Thermal Operations, New ESP Technologies

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Permanent Magnet Motor Safety

Cited by 9 publications

References 0 publications

Carbon Footprint Reduction Using Permanent Magnet Motors in Artificial Lift Systems

Carbon Footprint Reduction Using Permanent Magnet Motors in Artificial Lift Systems

A Failsafe Method of Preventing Voltage Generation During Installation and Pulling of ESPs with Permanent Magnet Motors

Thermal and Hydraulic Performance Testing of a Novel High Temperature ESP System for SAGD under Real Conditions

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