2015 04 04 protector.pdf
TRANSCRIPT
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PROTECTORS ERGIO G I OVANY C ABRERA S I ABATO
L AM A L SC I NT ERN E NGI NEER
C PG S CHLUMBERGER S URENCO.
COLOMBI A 2 0 15
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PROTECTOR
1. Introduction
2. Primary Functions
3. Protector Configurations
4. Protector Configuration Selection
5. Thrust Bearing Selection
6. Oil Selection
7. Failure Modes of Protectors and Thrust Bearings
8. Failure case: Protector
Jaguar 18
Cepsa Colombia S.A.
13-Feb-14
Schedule
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OBJECTIVES
Expose the way that a protector works.
Explain the main functions of a protector.
Show a real case when a protector fails and its consequences.
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1. Introduction
Source: F. Peña. “Bombeo electro sumergible. Descripción, diseño y monitoreo”. Schlumberger WCP Artificial Lift Sistem. Proyecto de grado en la modalidad de práctica empresarial. Universidad Industrial de Santander. Bucaramanga. 2005.
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2. Primary Functions
Couples the torque via protector shaft.
Prevents entry of well fluid into the motor.
Provides pressure equalization.
Houses the bearing to carry the thrust developed by the pump.
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3. Protector Configurations
Source: C, BREMER. G, HARRIS. A, KOSMALA. B, NICHOLSON. A, OLLRE. M, PEARCY. C, SALMAS. S, SOLANKI. “Envolving Technologies, Electrical Submersible Pumps”. Oilfield Review. Winter 2006/2007.
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Source: Artificial Lift Application Engineering Reference Manual. InTouch Content ID 4227449. 20-Feb-2008.
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Source: Artificial Lift Application Engineering Reference Manual. InTouch Content ID 4227449. 20-Feb-2008.
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Series and Parallel ConnectionsMultiple chambers can be connectedIn series (“S” redundant seal increasing the
reliability of a protector)
In parallel (“P” larger capacity for high powerapplications)
Parallel connections only possible with positiveseal chambers.
Bag chamber section applicationsIn deviated wells should be installed on top.
In vertical wells may be installed on the bottom.
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4. Protector Configuration SelectionMajor considerations:
• Compatibility with pump and motor
• Casing clearance when cable is installed
• Use of labyrinth or bag type design.
• Fluid expansión capacity.
• Ratings for temperatura and exposure to chemicals
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Chamber Selection
Source: Artificial Lift Application Engineering Reference Manual. InTouch Content ID 4227449. 20-Feb-2008.
Types of Protector Chambers – Application Advantages and Disadvantages
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Sizing Criteria – Thermal Cycling
1. Servicing the protector prior to installation.
2. System landing at settingdepth, oil expands.
Source: “Operation Cycles of LSB Modular Protector” Artificial Lift Application Engineering Reference Manual. InTouch Content ID 4227449. 20-Feb-2008.
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3. Motor Operates, oilexpands more.
4. Motor stops, oilcontracts.
Source: “Operation Cycles of LSB Modular Protector” Artificial Lift Application Engineering Reference Manual. InTouch Content ID 4227449. 20-Feb-2008.
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5. Motor Operating Cycles-On, oil expands.
5. Motor Operating cycles-Off, oil contracts.
Source: “Operation Cycles of LSB Modular Protector” Artificial Lift Application Engineering Reference Manual. InTouch Content ID 4227449. 20-Feb-2008.
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5. Thrust Bearing Selection
The thrust load rating for the protector bearing should be greater than the highest possible thrust load for the application.
The worst-case scenario, when the flowrate is zero. It should be evaluated to simulate production against a closed production valve.
Source: http://3.imimg.com/data3/CO/XN/MY-12085796/thrust-bearing-250x250.jpg
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6. Oil Selection
Source: “Guide line for te selection o Oils in ESPmotors” Artificial Lift Application EngineeringReference Manual. InTouch Content ID 4227449.20-Feb-2008.
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Source: Artificial Lift Application Engineering Reference Manual. InTouch Content ID 4227449. 20-Feb-2008.
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7. Failure Modes of Protectors and Thrust Bearings
Labyrinth protectors
Protector bags
BearingsThrust
Viscosity variations
Vibration
Rotation of the shaft in the wrong direction (HLT)
Contaminated Lubricant
Source: Efrain Velasquez. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP Schlumberger Colombia. Jaguar 18. 13-Feb-14.
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8. Failure Case: Jaguar 18Información General
Nombre del cliente: CEPSA COLOMBIA S.A (Cepcolsa)
Nombre del pozo: Jaguar 18
Run #: 2
Campo: Jaguar
País: Colombia
Fecha de instalación: 1 de Agosto, 2009
Fecha de la falla: 20 de Octubre, 2013
Fecha de Pulling: 24 de Octubre, 2013
Run Life: 1541 días
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Descripción del equipo instalado
Source: Efrain Velasquez. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP Schlumberger Colombia. Jaguar 18. 13-Feb-14.
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Simulación Septiembre 2013
Por simulación:Dentro del limite de upthust @ 60 HzCargas estables sobre los ejes
Durante el Pull:Medidas eléctricas no operativasFases desbalanceadas y sin aislamiento
Protector superior: Sin fluido en las cámaras.
Protector inferior: contaminación del aceite con fluido del pozo
427 Eventos de arranque.
Source: Efrain Velasquez. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP Schlumberger Colombia. Jaguar 18. 13-Feb-14.
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Protector superior
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Protector Inferior
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Source: Efrain Velasquez. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP Schlumberger Colombia. Jaguar 18. 13-Feb-14.
Prueba de hermeticidad en sellos y juntas Bolsas, vista interna
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Source: Efrain Velasquez. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP Schlumberger Colombia. Jaguar 18. 13-Feb-14.
Primera cámara, vista interna. Eje, Extremo superior
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Source: Efrain Velasquez. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP Schlumberger Colombia. Jaguar 18. 13-Feb-14.
Runner y thrust Bearing para Upthrust Runner y thrust Bearing para Downthrust
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Motor
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Source: Efrain Velasquez. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP Schlumberger Colombia. Jaguar 18. 13-Feb-14.
Prueba de hermeticidad Hipot test
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Source: Efrain Velasquez. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP Schlumberger Colombia. Jaguar 18. 13-Feb-14.
Cabeza, vista internaBase Vista interna
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Source: Efrain Velasquez. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP Schlumberger Colombia. Jaguar 18. 13-Feb-14.
Recubrimiento de Peek, interior del estatorThrust Bearing Y Runner
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Esquema de la causa raíz
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Referencias Bibliográficas.
1. F. PEÑA. “Bombeo electro sumergible. Descripción, diseño y monitoreo”. Schlumberger WCP Artificial Lift Sistem. Proyecto de grado en la modalidad de práctica empresarial. Universidad Industrial de Santander. Bucaramanga. 2005.
2. Artificial Lift Application Engineering Reference Manual. InTouch Content ID 4227449. 20-Feb-2008.
3. E. VELASQUEZ. Reporte de Desensamble, Inspección y Análisis de Falla. AL ESP SchlumbergerColombia. Jaguar 18. 13-Feb-14
4. C, BREMER. G, HARRIS. A, KOSMALA. B, NICHOLSON. A, OLLRE. M, PEARCY. C, SALMAS. S, SOLANKI. “Envolving Technologies, Electrical Submersible Pumps”. Oilfield Review. Winter 2006/2007.
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CuestionarioI. Cual es el principio de operación de un protector tipo laberinto.
II. Cual es el principio de operación de un protector tipo Bolsa
III. Cual es el protector más adecuado para uso en pozos altamente desviados.
IV. Cuales son las funcione principales de un protector.
V. Explique el efecto que tiene los arranques del equipo sobre la integridad del motor.
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¿Preguntas?
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Gracias por su atención y cumplida asistencia.