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Title: Geothermal pumping systems

Abstract

After successful field testing of a prototype pressurized lubrication system designed to prevent brine intrusion and loss of lubricating oil from the motor and protector sections of electric submersible pumps, a second-generation lubrication system has been designed, fabricated, and laboratory tested. Based on a sensitive downhole pressure regulator, this system is not depth limited and it accurately controls the differential pressure between the motor oil and the external brine. The first production lengths of metal sheathed power cable have been fabricated by Halpen Engineering and delivered to REDA for testing and evaluation. Laboratory tests performed on prototype metal sheathed cable samples have demonstrated the durability of this power cable design. The East Mesa Pump Test Facility is currently being activated for high-horsepower pumping system tests that are scheduled to commence during the first quarter of FY 85. A 300-horsepower REDA pumping system equipped with a pressure regulator controlled lubrication system and a metal sheathed power cable is being fabricated for testing in this unique facility.

Authors:
Publication Date:
Research Org.:
Los Alamos National Lab., NM (USA)
OSTI Identifier:
6281702
Report Number(s):
LA-UR-84-3252; CONF-8410179-1
ON: DE85002246
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: DOE geothermal technology conference, El Centro, CA, USA, 16 Oct 1984
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; GEOTHERMAL WELLS; PUMPS; LUBRICATION; BRINES; FABRICATION; FIELD TESTS; LUBRICATING OILS; PRESSURE REGULATORS; TEST FACILITIES; CONTROL EQUIPMENT; EQUIPMENT; LUBRICANTS; OILS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; PETROLEUM PRODUCTS; TESTING; WELLS; Geothermal Legacy; 150901* - Geothermal Engineering- Drilling Technology & Well Hardware

Citation Formats

Hanold, R.J. Geothermal pumping systems. United States: N. p., 1984. Web.
Hanold, R.J. Geothermal pumping systems. United States.
Hanold, R.J. Thu . "Geothermal pumping systems". United States. doi:. https://www.osti.gov/servlets/purl/6281702.
@article{osti_6281702,
title = {Geothermal pumping systems},
author = {Hanold, R.J.},
abstractNote = {After successful field testing of a prototype pressurized lubrication system designed to prevent brine intrusion and loss of lubricating oil from the motor and protector sections of electric submersible pumps, a second-generation lubrication system has been designed, fabricated, and laboratory tested. Based on a sensitive downhole pressure regulator, this system is not depth limited and it accurately controls the differential pressure between the motor oil and the external brine. The first production lengths of metal sheathed power cable have been fabricated by Halpen Engineering and delivered to REDA for testing and evaluation. Laboratory tests performed on prototype metal sheathed cable samples have demonstrated the durability of this power cable design. The East Mesa Pump Test Facility is currently being activated for high-horsepower pumping system tests that are scheduled to commence during the first quarter of FY 85. A 300-horsepower REDA pumping system equipped with a pressure regulator controlled lubrication system and a metal sheathed power cable is being fabricated for testing in this unique facility.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Oct 18 00:00:00 EDT 1984},
month = {Thu Oct 18 00:00:00 EDT 1984}
}

Conference:
Other availability
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  • Improvements in electric submersible pumping systems have resulted in a demonstrated downhole running life of one year for low horsepower units operating in 180 C brine. The implementation of a prototype pressurized lubrication system to prevent brine intrusion and loss of lubricating oil from the motor and protector sections has been successfully tested. Second generation pressurized lubrication systems have been designed and fabricated and will be utilized in downhole production pumping tests during FY84. Pumping system lifetime is currently limited by available power cable designs that are degraded by high-temperature brine. A prototype metal-sheathed power cable has been designed andmore » fabricated and is currently undergoing destructive and nondestructive laboratory testing. This cable design has the potential for eliminating brine intrusion into the power delivery system through the use of a hermatically sealed cable from the surface to the downhole motor. The two-phase flow program is directed at understanding the hydrodynamics of two-phase flows. The two-phase flow regime is characterized by a series of flow patterns that are designated as bubble, slug, churn, and annular flow. Churn flow has received very little scientific attention. This lack of attention cannot be justified because calculations predict that the churn flow pattern will exist over a substantial portion of the two-phase flow zone in producing geothermal wells. The University of Houston is experimentally investigating the dynamics of churn flow and is measuring the holdup over the full range of flow space for which churn flow exists. These experiments are being conducted in an air/water vertical two-phase flow loop. Brown University has constructed and is operating a unique two-phase flow research facility specifically designed to address flow problems of relevance to the geothermal industry. An important feature of the facility is that it is dedicated to two-phase flow of a single substance (including evaporation and condensation) as opposed to the case of a two-component two-phase flow. This facility can be operated with horizontal or vertical test sections of constant diameter or with step changes in diameter to simulate a geothermal well profile.« less
  • Improvements in electric submersible pumping systems have resulted in a demonstrated downhole running life of one year for low horsepower units operating in 180{sup 0}C brine. The implementation of a prototype pressurized lubrication system to prevent brine intrusion and loss of lubricating oil from the motor and protector sections has been successfully tested. Second generation pressurized lubrication systems have been designed and fabricated and will be utilized in downhole production pumping tests during FY 84. Pumping system lifetime is currently limited by available power cable designs that are degraded by high-temperature brine. A prototype metal-sheathed power cable has been designedmore » and fabricated and is currently undergoing destructive and nondestructive laboratory testing. This cable design has the potential for eliminating brine intrusion into the power delivery system through the use of a hermetically sealed cable from the surface to the downhole motor.« less
  • With the application of the Rankine-powered heat pump (RPHP), geothermal fluids at intermediate temperature (200 to 300/sup 0/F) become a viable energy source. The RPHP converts low temperature heat to usable process steam and allows utilization of heat sources, which are too low to generate useful steam directly. Additionally, the RPHP controls energy delivery temperature and rate, while producing superheated steam output. For geographic areas with abundant intermediate temperature resources, the RPHP is a flexible, economical means to generate process steam for industrial applications.