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ELEKTON-ABC (Anti-Backspin Coupling)
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Anti-Backspin Coupling
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FUNCTIONS: |  |
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- blocks reverse rotation of the ESP shaft in case of electric motor stoppage and check valve;
- provides torque transfer from the electric motor both in the forward and reverse directions;
- when used with an ESP unit with a permanent magnet motor, helps preventing the motor from generating current during backspinning and, accordingly, ensures the protection of the VSD and the staff;
- The use of the antibackspin coupling enables starting the pump fluid drainage from the tubing in case of the check valve or its absence;
- The use of anti backspin coupling in the ESP string with no check valve enables direct through-tubing flushing of the pump, and reduces the well killing time.
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BASIC SPECIFICATIONS |  |
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1. | Shaft rotation speed, RPM, max | 6000 |
2. | Maximum transmitted power, kWt | 125 |
3. | Filling oil volume | 1 |
4. | Weight, kg, max | 12,5 |
3. | Overall dimensions, mm, max | Ø103, length 377 |
3. | Allowed rotation direction | Direct when the ESP motor is switched off Direct and reverse rotation with operating ESP motor |
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Installation and connection dimensions |  |
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The anti backspin consists of a housing holding input and output shaft, and a disk self-stopping gear. The housing has flanges for the coupling
installation between the ESP motor and the protector. The shafts are mounted on the bearing assemblies. A self-stopping gear is located
between the shafts. Some elements of this gear interact with the input shaft and others – with the output shaft. When the input shaft rotates
in both forward and reverse directions, the self-stopping gear does not prevent the transfer of rotation to the output shaft. When the output
shaft rotates in the forward direction, the ESP operates in the normal mode, and in case of reverse rotation (backspin) it is immediately
retarded and stopped. The deceleration parameters (gripping time, braking force) remain unchanged over the entire service life. The service
life is determined by the durability of the bearing assemblies.
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RANGE of PRODUCTS
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