Description :

  Capsule air bag is a key stabilizing and buffering component in the pipeline system of oilfield mud pumps. It is mainly used to absorb the pressure pulsation generated during the operation of the mud pump, and solve the problems of pipeline vibration and instrument reading fluctuations caused by uneven flow. This device balances instantaneous high and low pressure through the compression and expansion of internal airbags, ensuring the continuity and stability of drilling fluid delivery. Typical operating conditions include oil drilling, well repair operations, and high-pressure mud circulation systems, which can effectively extend the service life of pump valve groups and pipeline connections and reduce maintenance frequency.

  The air bag adopts a high-strength steel shell combined with an oil resistant and wear-resistant rubber capsule, which complies with API 7K or relevant petroleum industry standards. The working pressure range usually covers 10MPa to 35MPa, depending on the model and specifications of the matching mud pump. The capsule material is mostly nitrile rubber or natural rubber, which has good aging resistance and oil and gas corrosion resistance. The airtightness test is strict to ensure that it will not rupture or leak under long-term high-frequency pulsating impact. The interface thread usually complies with NPT or BSP standards, making it easy to quickly connect with the existing mud pump outlet pipeline. The overall structural design is compact and suitable for harsh outdoor operating environments.

  When selecting, it is important to match the rated displacement and maximum working pressure of the mud pump. Air bags of different volumes are suitable for different power pump types, such as the F series or BW series mud pumps. Attention should be paid to distinguishing between capsule and diaphragm structures. Capsule structures are more suitable for high displacement and high pulsation frequency working conditions, while small and micro pumps may be suitable for other buffering forms. If the working conditions contain highly corrosive media or extreme temperatures, it is necessary to confirm the tolerance limit of the capsule material and avoid using standard parts that are not temperature resistant or chemically resistant to ensure voltage stabilization and safety.

  During installation, it should be vertically fixed near the outlet of the mud pump, and the bends and lengths of the connecting pipelines should be minimized as much as possible to reduce the influence of inertial resistance. Daily maintenance requires regular checks of the pre filled nitrogen pressure. It is recommended to monitor it once a shift or week to maintain the pre filled pressure at 60% -70% of the system's average working pressure. Common faults include capsule damage causing gas-liquid mixing, inflation valve leakage, etc. When the pressure gauge pointer swings violently or the buffering effect decreases, the machine should be stopped in time for inspection and replacement of the capsule. It is strictly prohibited to disassemble fasteners under pressure to ensure safe operation.

Core features of the product:

1. Effectively eliminate fluid pulsation

The built-in high-pressure nitrogen capsule structure absorbs the liquid impact and pressure pulse generated by the reciprocating operation of the mud pump, smooths out pressure fluctuations in the pipeline, and prevents water hammer vibration.

2. Whole machine protection, extending equipment life

Buffer instantaneous high-pressure impact, effectively prevent pipeline cavitation, pipe wall cracking, and pump valve damage, comprehensively protect the mud pump and delivery pipeline, and significantly reduce maintenance and replacement costs.

3. Stabilize the displacement and improve the efficiency of drilling operations

Balance the output flow of drilling fluid, reduce the fluctuation of pump load, ensure the continuous and smooth operation of drilling operations, reduce the frequency of shutdown and maintenance, and improve the efficiency of drilling construction.

4. Modular split design for convenient maintenance

The shell and internal capsule are separated in structure, and the rubber capsule can be disassembled and replaced separately, without the need to replace the damper as a whole. The maintenance cost is lower in the later stage, and disassembly is time-saving and labor-saving.

5. High strength and corrosion-resistant shell

The shell is made of forged alloy steel material, and the outer wall is treated with anti-corrosion paint, which is resistant to mud corrosion and high-pressure impact, and suitable for harsh high and low temperature conditions in oil fields.

6. Multi specification universal adaptation

It can be matched with a full range of oilfield mud pumps such as F800/F1000/F1300, and can be used for land drilling, water well drilling, and coalbed methane extraction.

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