An oil well drilling tool is a commonly used drilling and milling tool in oil and water well maintenance. It uses hydraulic pressure to drive the downhole drilling tool to rotate. It can be used for drilling, milling, sidetracking, and other operations. The requirements for well fluids are relatively high. On the other hand, the requirements for operation are relatively high. Improper operation during on-site construction can easily cause damage to the oil well drilling tools.
An oil well drilling tool comprises top connection, bypass valve, stator, rotor, water joint, bearing assembly, and lower connection.
1. Bypass valve is mainly made of the valve body, valve sleeve, valve element, spring, spring collar, plug, sieve plate, etc. It can prevent the rotor from inverting and loosening due to the large liquid density in the annular space, which causes the liquid to flow back into the drilling tool when drilling or connecting a single root.
2. Motor assembly is made of stator and rotor. The stator is a vulcanized rigid-body rubber sleeve with a double-end or multi-head spiral cavity in a processed steel cylinder. The rotor is formed by a single-end or multi-head spiral steel shaft made of alloy steel, plated with a layer of hard chrome for anticorrosion and abrasion resistance. The fit clearance between stator and rotor is controlled by chromium plating.
Hydraulic pressure of workover fluid from mud pump can drive the rotor to rotate, which provides rotating power energy for drills to break rocks. The motor assembly is the power source of oil well drilling tools.
3. Propeller shaft assembly is one of the important parts of oil well drilling tools. Its lifetime decides the overall lifespan of oil well drilling tools. It is used to transmit bit weight, torque, and washing fluid.