Drilling float valve specification
Basic principle of drilling float valve
Drilling float valve is a tool that controls the inflow and outflow of fluid through a valve. It is usually installed on the drill pipe or drill string to control the mud level, prevent mud backflow in drilling, and ensure the normal operation of the drill bit. The principle is to use the buoyancy of the float to push the float to the closed position of the valve to prevent the backflow of mud in the drill pipe or drill string.
Selection of drilling float valve
When selecting a drilling float valve, the following aspects need to be considered:
1. Material of the float valve: corrosion-resistant, high compressive strength and wear-resistant materials should be selected.
2. Size of the float valve: The corresponding size should be selected according to the diameter of the drill pipe or drill string to ensure that the float valve can operate normally.
3. Working pressure of the float valve: The corresponding working pressure should be selected according to the actual needs of the drilling operation to ensure that the float valve can withstand the corresponding pressure.
4. Float weight: The corresponding float weight should be selected according to the mud density and well depth to ensure that the float can control the inflow and outflow of fluid normally.
Specifications for the use of drill float valves
When using drill float valves, the following points should be noted:
1. Installation location: It should be installed as close to the drill bit as possible to control the mud level in time.
2. Operation method: The opening and closing of the float valve should be controlled according to the actual situation to achieve the expected control effect.
3. Maintenance: The wear of components such as floats, valves and sealing rubber rings should be checked regularly, and damaged components should be replaced in time.
4. Safety in use: It should be operated in accordance with the specifications to avoid accidents.
Conclusion
The drill float valve is an important drilling tool. Choosing a suitable float valve and operating and maintaining it in accordance with the specifications can effectively control the mud level, ensure the normal operation of the drill bit, reduce the probability of drilling accidents, and improve the efficiency of drilling operations.

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