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10/22/2016

Maintenance of rotary drilling rig spare parts (1)

Maintenance of rotary drilling rig (1)

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Fault phenomenon
In the procedure of normal operation to lay down the kelly bar, appearing with the phenomenon of its suddenly drops. 

Problems analysis
1. The pressure value of the main winch has deviation.
2. The external temperature is too low and the hydraulic oil is too sticky.
3. The cleanliness of the hydraulic oil is too low.

Related problem analysis
1. Measure the main winch's pressure value.
2. Block the hydraulic oil radiator, making the temperature to keep with three measure to reduce the viscosity.
3. Filter the hydraulic oil by the high-precision filter or replaced with new hydraulic oil and change a new filter element.

Related handling methods
1. Use instrument to measure and record the accuracy of the reading.
2. Observe the temperature on the instrument firstly, and measure the hydraulic oil temperature by the thermometer.

3. To check with the Rexroth cleanliness detector.

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