Coal mine flowmeter

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1. Wellhead Measurement Management Regulations

There are differences in wellhead measurement management regulations among different industries. The following are the relevant requirements of coal mines, oil production plants, and national measurement technical specifications:

1. Wellhead Measurement Management Regulations for Coal Mining Industry Raw Coal Production Measurement Method: Mitsuis raw coal production is measured using a nuclear scale, and the lifting hook number of the main shaft is used as an auxiliary verification.

. Calibration requirements: The nuclear scale needs to undergo zero point testing every ten days and physical calibration once a year. It is strictly prohibited to adjust parameters without authorization after calibration. Responsibility allocation: The belt work area needs to cooperate with the inspection. If the measurement deviation is caused by non cooperation or delayed reporting, a fine will be imposed. Management, storage, and maintenance of measuring instruments: Measuring instruments need to be kept by designated personnel, account cards should be established, and regular inspections, rust prevention, and maintenance should be carried out. Operating standards: Operators must be familiar with the performance and operate according to the regulations. Any abnormalities found must not be dismantled without authorization. Circulation approval: The purchase, transfer, and scrapping of measuring instruments must be reviewed and approved by the metrology leadership group.

2. Regulations on Measurement and Management of Water Injection Wells in Oil Production Plants: Injection volume control is required for water injection well measurement, in accordance with the "Wate

r Injection Well Sensitive Air Distribution Injection Bulletin". The water injection volume is settled daily, and the error must be controlled within the specified range.

. Equipment accuracy: When using an intelligent precision controlled water injection instrument, it needs to be powered on for 24 hours, with an instantaneous flow error of ≤ 0.2m ³/h. Data recording: The water injection volume of a single well is recorded every four hours. When the water meter malfunctions, the bottom number needs to be recorded and the water injection volume before the malfunction needs to be calculated. Balancing the total amount of metering and allocation for multiple wells: The total water injection volume in the station should meet the blind allocation of each single well bridge, and the water supply should be slightly greater than the allocation of single wells outside the station. Measurement basis: The digital wellhead is based on the reading of the flow meter, and the constant flow water distributor is based on the calibrated water distribution of the water nozzle.

III. Management of National Metrology Technical Standards (General Provisions) Main body for standard formulation and implementation: The State Administration for Market Regulation organizes the formulation and approval of standards, including calibration regulations, calibration standards, etc. Principle of formulation: It must comply with laws and regulations, balance scientificity and economy, and be open and transparent throughout the entire process. International standards adopt international standards: actively promote the adoption of international metrological standards published by the International Organization for Legal Metrology (OIML), and focu

1. Wellhead Measurement Management Regulations

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