Aluminum Alloy Car Bbattery Holder

fay@pride-cnc.com
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 13477665385

Well site repair, drilling technicians and drills must understand the structure of the drill and the use of parameters. Use drills reasonably as required by the instruction manual.

Drilling fluid requirements: the motor of the screw drill is volume type, the factor that determines the performance of the drill is the input flow of the motor and the pressure drop acting on both ends, not the type of drilling fluid. The physical and chemical properties of drilling fluid generally do not affect the performance of drilling rigs except for individual damage to the life of drills. However, the various hard particles contained in the drilling fluid must be limited because it accelerates the wear of bearings and sether motors and reduces the life of the drill. Therefore, the amount of sand in the mud must be controlled below 0.5%.

Mud viscosity and proportion have little effect on the drill, but the pressure of the whole system has a direct impact, if the recommended displacement pressure is greater than the rated pump pressure value, it is necessary to reduce the mud displacement, or it is necessary to reduce the pressure drop through the drill and drill bit. Each type of drill has its own input flow range, only in this range drill can have a higher efficiency, generally should take the input flow range of the median value is the best input flow value.

Mud pressure requirements:

When the drill is suspended, the displacement remains the same, then the mud pressure drop through the drill is also unchanged, with the drill bit contact with the bottom of the well drilling pressure increased, the mud circulation pressure increased, pump pressure also increased, drill can use the following formula to control the operation:

Drilling pump pressure , cycle pump pressure , drill load pressure drop

Circulation pump pressure is the drill does not touch the bottom of the well when the pump pressure, also known as off-bottom pump pressure, drilling tool to increase torque, pump pressure will rise, when the pressure meter reading is called drilling pump pressure. The off-bottom pump pressure is not a constant, it varies with the characteristics of well depth and mud, but in practice, there is no need to measure the accuracy value of the circulating pump pressure at any time, generally take the off-bottom pump pressure after each contact is approximate, which can fully meet the accuracy requirements of the formula.

Drilling tools in the work, drilling pump pressure to reach the maximum recommended pressure, drills produce the best torque. Continue to increase the drilling pressure, when the maximum design pressure is exceeded, the motor may brake, at this time should immediately reduce the drilling pressure to prevent internal damage to the drill.

Torque:

The torque of the drill is directly related to the pressure generated by the flow of mud through the motor, and the speed is directly related to the input displacement. When the displacement is certain, the torque increases and the speed remains basically the same, and the drill from empty load to full load speed is generally reduced by no more than 10%.

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