The General Problems and Solutions of Long Stroke Pumping Unit
Problems | Reasons | Solutions |
Pumping unit working unstable, such as vibration | Too much gas accumulated in the wellhead | Remove accumulated gas |
Cement foundation uneven | Pad the cement foundation or reinstall it if necessary | |
Base of pumping unit uneven | Pad the base and tighten the foot nut | |
Foot nut of pumping unit looseness | Tighten the foot nut | |
Pumping unit suspension center misaligned with wellhead | Adjust pumping unit to align suspension center to wellhead | |
Rod overload | Inspect the downhole Load based on suspension Load | |
· Suspension wheel bracket retaining bolt unscrewed | · Check retaining bolts and tighten nuts | |
· Transition wheel fault | Inspect transition wheel | |
· Guide wheel and guide rail of counterweight box fault | Check guide wheel and guide rail of counterweight box | |
Pumping unit shaking | Problems with downhole pumps | Check or replace pump |
Friction between sucker rod and tubing | Check and repair | |
Traction belt operate abnormal
Rod Connector skew |
The tightness of the two traction belts different | Adjust the traction belt to make the two traction belts tighten equally |
The connection of the traction belt looseness | Check the traction strap connection | |
Traction belt adjusting nut not tightened | Tighten the screw nut | |
Link flabby between rod hanger and rod | Clip specifications incorrect | · Replace the appropriate clip |
· Clip teeth wear | · Replace the clip | |
Starting difficulty or reciprocating power different obviously | Counterweight box weight insufficient | Increase counterweight |
Traction power insufficient | Check the electromotor and transmission system | |
Electrical control system fault | Check electrical control system | |
Distribution box abnormality | Control system fault | Check and troubleshoot |
Power train overheated and noisy | Power train retaining bolt looseness | Tighten the power train retaining bolt |
Power train bearing worn | Replace the bearing | |
Power train internal fault | Troubleshoot | |
Brake Fault | Brake rigging fault | Check and troubleshoot |
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