Feed pressure for PDC bits is significantly lower at comparable or higher rotational speed. Due to the absence of moving elements PDC bits, unlike roller cone bits, have no risk of losing tool parts, and due to high wear resistance the service life at full load is 3-5 times longer. Drilling with PDC bits is possible in rocks from soft to hard and abrasive.
Main functions of diamond PDC bit:
Hard rock breaking:
PDC bit effectively breaks hard and abrasive rocks such as granite, limestone and other rocks with high strength. This makes it an ideal choice for drilling in difficult geologic environments where traditional bits can wear out quickly.
Increased drilling speed:
The diamond bit significantly increases drilling speed due to its high strength and hard rock efficiency. This reduces the time required for drilling, which in turn reduces costs and improves the overall efficiency of the operation.
Durability and wear resistance:
The PDC bit's diamond inserts are highly wear resistant, making it a durable tool when drilling in highly abrasive environments. This significantly increases the life of the bit compared to traditional roller cone bits.
Working principle of diamond PDC bit:
Polycrystalline diamonds:
The main advantage of the PDC bit is the use of polyelemental diamond inserts. These diamonds are made up of many small crystals, making them extremely hard and able to withstand the high loads and temperatures encountered during the drilling process.
Direct impact on the rock:
In PDC drilling, the bit fractures the rock not only by impact, as in the case of roller cone bits, but also by the constant abrasive action of the diamond inserts, resulting in high drilling speed and accuracy.
Uniform load distribution:
The diamond inserts distribute the load evenly over the entire working surface of the bit, which contributes to longer term use and prevents premature wear.
Advantages of using diamond PDC bits:
High drilling speed: Due to the wear resistance and stiffness of the diamond inserts, PDC bits allow you to drill faster than conventional bits, reducing overall drilling time.
Durability and wear resistance: Diamond inserts provide much longer bit life, reducing the need for frequent tool changes and improving drilling economics.
Suitable for hard and abrasive rock: The PDC bit works effectively in environments where traditional bits wear out quickly, such as rock with high abrasive content.
Lower operating costs: Due to high drilling speed and durability, the use of PDC bits can significantly reduce overall drilling costs.
Better borehole quality: PDC bits provide flatter borehole walls, making it easier to install casing and other wellbore components.важины.