GB/T 14816-1993 General technical requirements for three-phase asynchronous motors for submersible oil wells
Some standard content:
National Standard of the People's Republic of China
General technical conditions for three-phase asynchronous motors for submersible oil wellsThree-phase asynchronous motors for submersible oil wellsGeneral specification
1 Subject content and scope of application
GB/T 14B16--93
This standard specifies the model, basic specifications and matching dimensions, technical requirements, test methods, inspection rules, as well as marking, packaging, transportation and storage of three-phase asynchronous motors for submersible oil wells (hereinafter referred to as submersible motors). This standard is applicable to submersible motors matched with submersible electric pumps. It can also be used as a reference for submersible motors matched with submersible electric pumps for water wells and brine wells.
2 Reference standards
Determination of dielectric strength of insulating oil
Determination of tensile properties of vulcanized rubber
Basic technical requirements for rotating electrical machines
Test methods for three-phase asynchronous motors
GB 1032
GB I144
Dimensions, tolerances and inspection of rectangular splines
GB1993
Motor cooling methods
GB2828 Batch-by-batch counting sampling procedures and sampling tables (applicable to inspection of continuous batches) GB4942.1 Motor housing protection classification
3 Terms and codes
3.1 Terms
3.1.1 Seal section, Protector Seal protector (referred to as protector) should be installed in conjunction with submersible peach. It is used to seal the motor and transmit the motor torque. 3.1.2 Coast time
After the narrow load test of the submersible motor is completed and the power is cut off, the time for the rotor to continue to rotate due to inertia until it stops completely. 3.1.3 Static moment
The maximum torque that enables the rotor to rotate evenly in the state of vertical suspension of the submersible motor. 3.2 The model representation method of the submersible motor is as follows: Approved by the State Technical Supervision Commission on December 30, 1993 and implemented on October 1, 1994
GB/T14816-93
Design number, 2, 3, 4*·No number indicates the design number is 1 Characteristic code: D-single-section submersible motor; J-basic section submersible motor, S-upper section submersible motor; Z-middle section submersible motor: X-lower section submersible motor submersible motor Rated power of the motor, starting from
Applicable oil well temperature level, no code is 50℃ and below, G-90℃ and below, T-120℃ and above, C-higher than 120℃ series code, characterizes the outer diameter of the submersible motor, mm asynchronous, submersible
Model example: YQY114G-75F2 represents a single-section submersible motor with a design number of 2, an outer diameter of $114mm, suitable for oil wells with a well temperature of 90℃ and below, and a power of 75kW.
4 Type, basic parameters and dimensions
4.1 The submersible motor is a two-pole squirrel cage three-phase asynchronous motor with a closed oil-filled structure. 4.2 The protection level of the submersible motor housing is IP58 as specified in GB4942.1. 4.3 The cooling method of the submersible motor is ICU08U40 as specified in GB1993. 4.4 The submersible motor is installed vertically.
4.5 The rating of the submersible motor is a continuous rating based on the continuous duty system (S1). 4.6 The rated frequency of the submersible motor is 50Hz, the rated voltage is specified in the product technical conditions, and it is powered by a special transformer for submersible electric pumps. 4.7 When the user requires, the oil motor can also be manufactured at 60Hz, and the rated power of the submersible motor at this time may not be consistent with Table 3. 4.8 The length of each section of the submersible motor should not exceed 10m. Due to the need for increased power, a series-connected submersible motor can be made. 4.9 The connection dimensions and tolerances of the submersible motor shall comply with the provisions of Table 1, Table 2 and Figure 1, Figure 2. The rectangular spline shall comply with the provisions of GB1144. When the user and the manufacturer have an agreement, the connection dimensions and tolerances may be specified separately. The true diameter and spline of the shaft shall be calculated according to the maximum torque guarantee value of the submersible motor for static strength, and the fatigue strength shall be calculated according to the rated torque of the submersible motor. The combined stress is calculated according to the third strength theory, and the maximum combined stress calculated by static strength should not exceed 30% of the steel's yield strength limit. The connecting screws are made of materials with a yield strength limit of not less than 550MPa. Figure 1 Spline sleeve Submersible motor series Submersible motor series GB/T 14B16—93 Table 1 Spline sleeve dimensions Protector series Screw hole M Figure 2 Connector on single-section or upper-section submersible motor Table 2 Connector dimensions on single-section or upper-section submersible motor Connecting screw hole 6XM10X1.25 Spline pair d Connector to protector and submersible motor 40×95 40×95 45×95 45×95 45×95 Submersible motor series GB/T 14816—93
Continued Table 2
Connection screw hole
6XM12X1, 25
10XM12×1.25
Spline pair
4.10 The electrical connection method and connection size of the submersible motor shall be specified in the product technical conditions. 4.11 The submersible motor shall be manufactured according to the rated power level in Table 3. Table 3 Rated power of submersible motor
Submersible motor
Power of single submersible motor
10,12.5,15,17.5,20,22.5,25,27..5,30,32.5+35,37.5,40,42. 5.45,47.5,50,55.60,65,7520,25,30,35,40,45,50,55.60,65,70,75,8525,30,35,10,15,50,55.50.65,75,85,90,95,105,115,120c10
Apply for submersible motor power
Connect any combination of single-section submersible motor, but the maximum power is 150
According to any combination of single-section submersible motor, the maximum power is 170
According to any combination of single-section submersible motor, but the maximum power is 240
4.12 The submersible motor rotates clockwise when viewed from the shaft extension end. If counterclockwise rotation is required, please indicate it in the order contract and mark the direction of rotation with an indicator on the motor connector.
5 Technical requirements
5.1 The submersible motor should be used in conjunction with a seal protector, which should comply with the provisions of Appendix A. 5.2 The submersible motor should comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 5.3 The submersible motor should be able to operate at rated speed under the working environment conditions specified in Table 4. Environmental factors
Hole bottom temperature
Hole bottom static pressure
When the submerged electric pump is working,
Submersible motor housingWell
Liquid flow rate 1
Natural gas
And the amount of sand in the liquid
Well inclination
GB/T 14816-—93
Underground working environment conditions and their classification
Environmental factor classification
0. 15svs5.00
When the temperature is 120'℃, the special ball order processing
More than 25MPa When the natural gas contains H, S, CO, it shall be handled according to special order. When it exceeds the regulations, it shall be handled according to special order. When it is greater than 15°, it shall be handled according to special order. 5.4 The deviation of the power supply voltage and frequency from the rated value during the operation of the submersible motor shall comply with the provisions of GB755. 5.5 When the power, voltage and frequency of the submersible motor are rated, the guaranteed value and tolerance of its performance shall comply with the provisions of Table 5. Table 5 Performance parameters and tolerances of submersible motors
Item name
Power factor
Stalled torque multiple
Submersible motor series
Guaranteed value
Item name Www.bzxZ.net
Maximum torque multiple
Slip rate S
GB/T14816—93
Continued Table 5
Submersible motor series
Guaranteed value
5.6 Submersible motors should have good sealing performance. After the sealing performance test, there should be no leakage at each connection and plug. Tolerance
5.7 According to the different bottom hole temperatures, submersible motors can use insulation structures with different heat resistance grades, and the corresponding winding allowable limit temperature values should comply with the provisions of Table 6.
Table 6 Insulation heat resistance grade and allowable limit temperature of winding of submersible motor Insulation heat resistance grade
Allowable limit temperature of winding of submersible motor (resistance method) B
5.8 The oil filled in the submersible motor (referred to as motor oil) should have good lubrication and electrical properties. The breakdown voltage of the motor oil in a standard discharger with a gap of 2.5mm shall not be less than 18kV. The breakdown voltage value of the oil sample taken out after the no-load test of the submersible motor shall not be less than 12kV. 5.9 After filling with oil, the cold insulation resistance of a single (section) submersible motor at room temperature shall not be less than 500M. 5.10 The winding of the submersible motor shall be able to withstand a withstand voltage test for 1min without breakdown. The frequency of the test voltage is 50Hz. It should be as waveform as possible, and the effective value of the voltage is 2 times the rated voltage of the submersible motor 1000V. 5.11 The insulation of the submersible motor should have good oil and water resistance. After 10 days of testing according to the oil and water resistance test method of the insulation structure of the B-type, the simulated stator winding hot insulation resistance should not be less than 100M0, and no breakdown should occur in the test of 70% of the withstand voltage value specified in Article 5.10. 5.12 The insulation resistance of the winding of a single (section) submersible motor should not be less than 15M in the hot state or after the temperature rise test, and the series motor should not be less than 7.5M2.
5.13 When the three-phase power supply is balanced, the absolute value of the deviation between any phase of the three-phase no-load current of the submersible motor and the average value of the three phases should not be greater than 10% of the average value of the three phases.
5.14 The coasting time of the submersible motor should be specified in the product technical conditions. 5.15 At room temperature and in liquid, when a single (section) submersible motor is in the actual cold state, the applied static torque should not be greater than the following value. For submersible motors with a diameter of 107: 9V·m; for submersible motors with a diameter of 114: 12N-·m; for submersible motors with a diameter of 4138: 20N·m5.16 The allowable radial runout of the spline shaft surface to the stop is not more than 0.18mm5.17 In accordance with the provisions of the operating and maintenance instructions, when the working environment temperature of the submersible motor is 50C or below, the manufacturer shall ensure that the submersible motor can operate normally within one year of installation in the production well, but no more than 18 months from the date of shipment from the manufacturer. If the submersible motor is damaged or cannot operate normally due to poor manufacturing quality within this specified time, the manufacturer shall repair or replace parts for the user free of charge. When the downhole working environment conditions are different from Table 4 or the well fluid temperature exceeds 50℃, the warranty period shall be agreed upon separately with the user.
6 Test method
6.1 The submersible motor shall be tested according to the test method specified in this standard. If not specified in this standard, it shall be tested according to GB1032. 6.2 Check the connection size, installation size and radial runout of the submersible motor according to the method specified in the process documents. 6.3 The sealing performance test of the submersible motor is to pass dry air or nitrogen into the submersible motor. The test pressure is 0.5MPa and the test lasts for 5 minutes. The joints and plugs are smeared with soapy water. No bubbles should be generated. 6.4 Static torque measurement, the submersible motor is suspended vertically in the test well and tested with a dynamometer. 6.5 The no-load test of the submersible motor is to run no-load for no less than 0.5h at the rated voltage. When the input current and input power are basically stable, the required data are measured.
6.6 The rotor coasting time is measured at the end of the no-load test. 6.7 The type test is carried out under the condition of cooling medium temperature of 50±3℃, and the test data measured under this condition is converted according to Class B insulation motor to determine the electrical performance of the submersible motor. The mechanical consumption, steel loss and slip rate of the submersible motor are no longer corrected according to the insulation grade temperature.
6.8 The insulation resistance and withstand voltage test of the submersible motor are carried out at the end of the load or temperature rise test. The insulation resistance of the winding to the ground is measured with a 1000V megohmmeter, and the withstand voltage test is performed. 6.9 The oil and water resistance performance test of the insulation structure of the submersible motor is carried out in accordance with Appendix B. 6.10 The motor oil test is to release the motor oil from the bottom of the submersible motor at the end of the no-load test and test it according to GB507. If the breakdown voltage is less than 12kV, it is allowed to re-inject new oil. After no-load operation for 0.5h, the oil sample is taken again for breakdown test. If it still fails, it is regarded as unqualified in this assessment.
7 Inspection rules
7.1 The submersible motor shall comply with the provisions of this technical condition and can only leave the factory after passing the inspection, and shall be accompanied by a product certificate. 7.2 In order to check whether the submersible motor meets the relevant requirements of this standard, factory inspection and type inspection shall be carried out. 7.3 Each submersible motor shall be inspected at the factory, and the test items are as follows: a.
Appearance, connection dimensions, overall dimensions and radial runout inspection; in the actual cold state, the insulation resistance of the stator winding to the housing is measured; in the actual cold state, the DC resistance of the stator winding is measured; stator winding withstand voltage test;
Sealing performance test;
No-load current and loss measurement;
Note: The load characteristic curve needs to be measured during the type inspection. g.
Stalled rotor current and loss measurement;
Note: The stalled rotor characteristic curve needs to be measured during the type inspection. h.
Measurement of motor oil breakdown voltage:
Static torque measurement,
Measurement when the rotor is sliding.
7.4 Type inspection must be carried out in any of the following situations: When the trial production of new products is completed!
When the design, process or material changes of the submersible motor are sufficient to cause changes in certain performances: When the inspection results are unacceptable deviations from the previous type inspection results; Submersible motors produced in batches are regularly sampled and tested once a year. 7.5 Type inspection items for submersible motors include: a.
All items of factory inspection;
Temperature rise test
Efficiency, power factor and slip rate measurement; Maximum torque measurement,
Hot insulation resistance measurement:
Insulation structure oil and water resistance performance test.
GB/T 14816.93
Note: Insulation structure surface oil-water performance test shall be carried out at least once every three years for batch-produced submersible motors, except when the insulation structure is finalized and the insulation material or insulation process is changed.
7.6 Sampling for submersible motor type inspection shall be carried out according to GB2828 as special inspection level S-1, qualified quality level AQL is 6.5, when the product batch size is less than 50 units, the number of samples = 2, when 51 to 500 units, n = 3, when 501 to 1 200 units, n = 5. The qualified judgment number A. is 0, and the unqualified judgment number R. is 1.
8 Random accessories and matching accessories
8.1 Consumable parts for going down the well are provided randomly. 8.2 Spare parts and special tools can be provided according to the supply contract. 9 Marking, packaging, transportation and storage
The nameplate material and the method of engraving the data on the nameplate should ensure that the writing is not easily erased during the entire service period of the submersible motor. 9.2
The items to be marked on the nameplate are as follows;
Name and model:
Rated power,
Rated frequency;
d.: Rated current,
Rated voltage;
Rated speed:
Insulation grade;
Manufacturer's production year and month and production number;
Weight;
Product technical condition number.
9.3 The submersible motor should be placed in a rectangular steel packaging box. The outside of the box should have a hanging rack, and there should be enough support blocks inside the box. There should be an observation hole at the end of the packaging box, a drainage hole at the bottom, and opening rings at both ends. 9.4 The words and signs on the outer wall of the packing box should be clear and neat, and the contents are as follows: the name and address of the shipping station and the manufacturer; the name of the receiving station and the receiving unit, the name, model and factory number: the net weight and gross weight; the overall dimensions of the packing box, the delivery date: "Light efficiency" and "hoisting position" should be marked in appropriate positions, and a red paint mark should be painted on the head of the submersible motor. 9.5 Random documents should be sealed in a plastic bag and placed in the packing box. Random documents include: a. Packing list: product certificate, operating and maintenance instructions in accordance with GB/T 14816-93 9.6 Disposable and consumable parts, spare parts and tools should be packed separately and marked, and metal parts should be coated with anti-rust oil 9.7 The transport vehicle must be of sufficient length, and the part of the vehicle body extending out of the vehicle compartment shall not exceed 1m. 8 The submersible motors stored here should have an appropriate amount of motor oil and be placed on a flat cement floor or bracket. GB/T 14816-93
Appendix A
Basic technical requirements for sealing protectors
(Supplement)
This appendix specifies the model, basic parameters and connection dimensions, main technical requirements, test methods and inspection rules of the sealing protectors (hereinafter referred to as protectors) installed in conjunction with submersible motors. Protector model representation method
Design number, 2, 3, 4, no number indicates that the design number is 1Structural code: L-
-Connected type C
-Precipitation type, N-
Capsule type; T-
-Others
Applicable well temperature level: 90°C and below, T is 120°C and below, C is higher than 120°C
Series code, characterizing the outer diameter of the protector, mm submersible, protective
For example, QYI98G-N indicates a rubber decay protector with a design number of 1, an outer diameter of 98mm, and an applicable well temperature of 90°C and below. Note: The structural codes in the protector model can be combined for convenience. For example, NC indicates capsule precipitation type. A2 Basic parameters and connection dimensions
The outer diameter, connection size and tolerance of the protector shall comply with the provisions of Table A1, Table A2, Figure A1, Figure A2. The rectangular spline shall comply with the provisions of GB1144. When the user and the manufacturer have an agreement, the connection dimensions and tolerances may be specified separately. Hole
Screw hole M
Protector upper joint
Protector lower joint
Protector
Protector
A3 Technical requirements
GB/T14816—93
Table A1 Connection dimensions of protector upper joint (Figure A1) Spline pair
Connection screw hole
6XM10X1.25
6XM12X1.25
10×M12X1.25
Table A2 Connection dimensions of protector lower joint (Figure A2) Spline pair
Connection hole
A3.1 The protector should have good sealing performance to prevent well fluid from entering the inside of the submersible motor. The protector cavity should have enough volume to balance the pressure inside the submersible motor and the well fluid pressure and to replenish the motor oil lost due to mechanical seal leakage. A3.2 A thrust bearing is installed in the protector to bear the residual axial force of the pump and separator. Its allowable value is specified in the product technical conditions.
The protector should be able to meet the requirements of transmitting the power of the submersible motor. The protector mechanical seal cavity should not leak after the sealing test. 43.4
GB/T 14816—93
A3.5 The protector shell should be tested for sealing, and there should be no leakage at all joints and plugs. A3.6 The key components of the protector such as the capsule and the one-way valve must be inspected according to the technical requirements before assembly. A3.7 The protector capsule material should have good mechanical properties and oil resistance. After 15 days of testing, the fluororubber performance should not be lower than the requirements of Table A3.
Table A3 Fluororubber capsule material properties
Test items
Mechanical properties
Original value
After 15 days of motor oil test
After 15 days of crude oil test
After 15 days of H, S test
Tear-off elongation
Tear-off strength
Note: (1) If other materials are used, their performance indicators are specified in the product technical conditions. ②H, S resistance test is only carried out when the user requires it. Appearance
Black and bright
No stickiness or cracking
A3.8 The one-way valve of the protector capsule should be able to open at a pressure of 2035kPa. There should be no leakage at a reverse pressure of 0.1MPa. A3.9 The protector capsule should be able to withstand a 50kPa air pressure test for 1min without leakage or cracking. A3.10 When the protector is tested for no-load operation, its permissible power consumption value is specified in the product technical conditions. There is no visible leakage of the mechanical seal after the no-load test.
A3.11 After the protector is tested for 200 hours, no well fluid should enter the isolated cavity. 43.12 The permissible radial runout of the protector spline surface to the stopper is not more than 0.18mm. A3.13 Under the condition that the user correctly stores, transports, installs and operates the protector according to the provisions of the operating and maintenance instructions, when the working environment temperature of the protector is 50 or below, the manufacturer shall ensure that the protector can play a protective role within 1 year of use in the production well, but not more than 18 months from the date of shipment from the manufacturer. If the protector is damaged or fails to protect due to poor manufacturing quality within this specified time, the manufacturer shall repair or replace parts for the user free of charge. When the underground working environment conditions are different from those in Table 4 or the well fluid temperature exceeds 50℃, the warranty period shall be agreed upon with the user.
A4 Test method
A4.1 The sealing performance test of the mechanical seal cavity is to pass gas into the sealing cavity at the pressure specified in the product technical conditions under static state for 5 minutes, and no bubbles should be generated on the outside. A4.2 The seal test of the protector shell is to pass gas with a pressure of 0.5MPa into the shell. At this time, the pressure of the inner and outer cavities of the mechanical seal and the inner and outer cavities of the capsule should be the same. The duration is 5minmin. All joints and plugs are smeared with soapy water. No bubbles should be generated. A4.3 The pressure test of the protector capsule check valve is to pass gas into the inner cavity side of the capsule at a pressure of 20~35kPa. At this time, the check valve should be opened. The motor oil is pressurized to 0.1MPa in the reverse direction for 5min. There should be no oil leakage from the check valve. A4.4 The no-load operation test of the protector is to install the protector vertically and use a calibrated motor with a speed range of 2700-3000r/min to drive it to run under load. After the input current and power of the motor are stable, but the running time must not be less than 30 minutes, measure the power consumed by the protector. When the internal pressure is 20~～35kPa, no oil leakage is allowed at the mechanical seal by visual inspection. A4.5 The 200h load test of the protector is carried out in the test in the same way as the complete submersible electric pump unit. After the test, the unit is left to stand for 12 hours, and then 1 liter of motor oil is released from the bottom of the submersible motor and the seal cavity of the protector to check whether there is water entering. A4.6 The material performance test of the protector capsule is to randomly take out one capsule from the batch production and test the cylindrical part according to the provisions of GH 528.7 The material of the protector capsule should have good mechanical properties and oil resistance. After 15 days of testing, the performance of fluororubber should not be lower than that specified in Table A3.
Table A3 Performance of fluororubber capsule materials
Test items
Mechanical properties
Original value
After 15 days of motor oil test
After 15 days of crude oil test
After 15 days of H, S test
Tear-off elongation
Tear-off strength
Note: (1) If other materials are used, their performance indicators are specified in the product technical conditions. ②H, S resistance test is only carried out when the user requires it. Appearance
Black and bright
No stickiness or cracking
A3.8 The one-way valve of the protector capsule should be able to open at a pressure of 2035kPa. There should be no leakage at a reverse pressure of 0.1MPa. A3.9 The protector capsule should be able to withstand a 50kPa air pressure test for 1min without leakage or cracking. A3.10 When the protector is tested for no-load operation, its allowable power consumption value is specified in the product technical conditions. There is no visible leakage of the mechanical seal after the no-load test.
A3.11 After the protector has been tested for 200h, no well fluid should enter the isolated cavity. 43.12 The allowable radial runout of the protector spline surface to the stopper is not greater than 0.18mm. A3.13 Under the condition that the user correctly stores, transports, installs and operates the protector in accordance with the provisions of the use and maintenance instructions, when the working environment temperature of the protector is 50 or below, the manufacturer shall ensure that the protector can play a protective role within 1 year of use in the production well, but no more than 18 months from the date of shipment from the manufacturer. If the protector is damaged or fails to protect due to poor manufacturing quality within this specified time, the manufacturer shall repair or replace parts for the user free of charge. When the downhole working environment conditions are different from those in Table 4 or the well fluid temperature exceeds 50°C, the warranty period shall be agreed upon with the user.
A4 Test method
A4.1 The sealing performance test of the mechanical seal chamber is to pass gas into the sealing chamber at the pressure specified in the product technical conditions under a static state for 5 minutes, and no bubbles should be generated on the outside. A4.2 The seal test of the protector shell is to pass gas with a pressure of 0.5MPa into the shell. At this time, the pressure of the inner and outer cavities of the mechanical seal and the inner and outer cavities of the capsule should be the same. The duration is 5minmin, and soapy water is used to smear all joints and plugs. No bubbles should be generated. A4.3 The pressure test of the protector capsule check valve is to pass gas into the inner cavity side of the capsule at a pressure of 20~35kPa. At this time, the check valve should be opened. The motor oil is pressurized to 0.1MPa in the reverse direction for 5min. There should be no oil leakage from the check valve. A4.4 The no-load operation test of the protector is to install the protector vertically and use a calibrated motor with a speed range of 2700-3000r/min to drive it to run under load. After the input current and power of the motor are stable, but the running time must not be less than 30 minutes, measure the power consumed by the protector. When the internal pressure is 20~～35kPa, no oil leakage is allowed at the mechanical seal by visual inspection. A4.5 The 200h load test of the protector is carried out in the test in the same way as the complete submersible electric pump unit. After the test, the unit is left to stand for 12 hours, and then 1 liter of motor oil is released from the bottom of the submersible motor and the seal cavity of the protector to check whether there is water entering. A4.6 The material performance test of the protector capsule is to randomly take out one capsule from the batch production and test the cylindrical part according to the provisions of GH 528.7 The material of the protector capsule should have good mechanical properties and oil resistance. After 15 days of testing, the performance of fluororubber should not be lower than that specified in Table A3.
Table A3 Performance of fluororubber capsule materials
Test items
Mechanical properties
Original value
After 15 days of motor oil test
After 15 days of crude oil test
After 15 days of H, S test
Tear-off elongation
Tear-off strength
Note: (1) If other materials are used, their performance indicators are specified in the product technical conditions. ②H, S resistance test is only carried out when the user requires it. Appearance
Black and bright
No stickiness or cracking
A3.8 The one-way valve of the protector capsule should be able to open at a pressure of 2035kPa. There should be no leakage at a reverse pressure of 0.1MPa. A3.9 The protector capsule should be able to withstand a 50kPa air pressure test for 1min without leakage or cracking. A3.10 When the protector is tested for no-load operation, its allowable power consumption value is specified in the product technical conditions. There is no visible leakage of the mechanical seal after the no-load test.
A3.11 After the protector has been tested for 200h, no well fluid should enter the isolated cavity. 43.12 The allowable radial runout of the protector spline surface to the stopper is not greater than 0.18mm. A3.13 Under the condition that the user correctly stores, transports, installs and operates the protector in accordance with the provisions of the use and maintenance instructions, when the working environment temperature of the protector is 50 or below, the manufacturer shall ensure that the protector can play a protective role within 1 year of use in the production well, but no more than 18 months from the date of shipment from the manufacturer. If the protector is damaged or fails to protect due to poor manufacturing quality within this specified time, the manufacturer shall repair or replace parts for the user free of charge. When the downhole working environment conditions are different from those in Table 4 or the well fluid temperature exceeds 50°C, the warranty period shall be agreed upon with the user.
A4 Test method
A4.1 The sealing performance test of the mechanical seal chamber is to pass gas into the sealing chamber at the pressure specified in the product technical conditions under a static state for 5 minutes, and no bubbles should be generated on the outside. A4.2 The seal test of the protector shell is to pass gas with a pressure of 0.5MPa into the shell. At this time, the pressure of the inner and outer cavities of the mechanical seal and the inner and outer cavities of the capsule should be the same. The duration is 5minmin, and soapy water is used to smear all joints and plugs. No bubbles should be generated. A4.3 The pressure test of the protector capsule check valve is to pass gas into the inner cavity side of the capsule at a pressure of 20~35kPa. At this time, the check valve should be opened. The motor oil is pressurized to 0.1MPa in the reverse direction for 5min. There should be no oil leakage from the check valve. A4.4 The no-load operation test of the protector is to install the protector vertically and use a calibrated motor with a speed range of 2700-3000r/min to drive it to run under load. After the input current and power of the motor are stable, but the running time must not be less than 30 minutes, measure the power consumed by the protector. When the internal pressure is 20~～35kPa, no oil leakage is allowed at the mechanical seal by visual inspection. A4.5 The 200h load test of the protector is carried out in the test in the same way as the complete submersible electric pump unit. After the test, the unit is left to stand for 12 hours, and then 1 liter of motor oil is released from the bottom of the submersible motor and the seal cavity of the protector to check whether there is water entering. A4.6 The material performance test of the protector capsule is to randomly take out one capsule from the batch production and test the cylindrical part according to the provisions of GH 528.
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