Maintenance of Drilling Rig Pneumatic Control System_Oil Drilling Rig Manufacturer
Release time:
2020-05-21
The guarantee of the gas control system will have a serious impact on production. Therefore, it is very important to maintain and maintain the gas control system of the drilling rig. Usually, the following aspects must be paid attention:
(1) to prevent the leakage of compressed air.
The normal operation of the gas control system must ensure the supply of a certain amount and pressure of compressed air, otherwise there will be an accident of insufficient output due to wrong action. Therefore, there may be air leakage sound. After shutdown, engage all clutches, and the pipeline pressure drop shall be within the allowable range. For ZJ130-3 drilling rig, when the compressed air pressure is not lower than 9 atm, the pressure drop shall not exceed 1 atm for 30min.
(2) Pay attention to the cleanliness of the pipeline.
If there is dirt, impurities into the air pipe will make the valve failure. When the rig is transported, the disassembled pipe joints must be well protected, and the openings of metal pipes must be blocked with cork plugs. Before pipeline installation, compressed air should be used to clean the pipeline and then connect it. Never be careless.
(3) When it is found that the air control valve parts work failure, do not disassemble the valve parts without analysis, because there are many reasons for the failure of the air control valve parts, sometimes it is not the valve parts themselves, but because the gas pipeline is blocked or the air pressure is too small (the origin pressure is low, the pipeline leaks seriously) and other reasons. Therefore, must be segmented inspection, method: first from the control valve, control pipeline, to the remote control valve, segmented open air connector, check the ventilation. If the control gas circuit is unblocked, check whether the working gas circuit is unblocked. The method is: disconnect the air outlet pipeline of the valve first, and check the ventilation condition. If it is not unblocked, check whether the origin of the air inlet line of the valve is blocked. If it is unblocked, it is proved that there is a problem with the valve, and then the valve can be opened for inspection. If there are spare valves, replace them first and find out the defects of the replaced valves. In short, if there is a problem with the gas circuit, we must patiently and carefully find out the cause and deal with it correctly. Blind demolition and repair are strictly prohibited.
The pneumatic valve body has another feature: it has been working well during continuous use, but it suddenly failed after a few days of use. This situation is more likely to occur on dual-use relays. This is because the valve cavity will produce rust during the deactivation period, which will increase the assistance of the valve movement department, and cause air leakage due to work failure. Only the spool repeated activities several times can work properly. If the leakage continues, the valve must be opened instead to check the reason. When the drilling rig after a well or after a certain period of time (the longest should not exceed 3 months), the entire gas control system should be a maintenance, a comprehensive inspection of the wearing parts, so that timely replacement after cleaning, to avoid the valve in an abnormal state of work.
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