Difference in the carbide button design of button bits?
The design of?carbide button?in button bits varies based on the type of rock, the desired penetration rate, and wear resistance,etc.?The alignment of carbide buttons plays a critical role in determining the bit's efficiency, durability, and suitability for specific rock. Button alignment refers to the arrangement and positioning of the carbide buttons on the face of the bit. For example, for T51-89mm drill bit, the button design can be 18*?11, and also can be 6*?12+ 8*?13 or others. ?So what’s the difference? This article will take T51-89MM drill bit as a sample to introduce the difference of different button design.
Difference in the carbide button?design of button bits
Definition Explanation
l 18*?11?means that the size of buttons?(including the front and gauge button) of the drill bit is??11. And there are total 18 buttons. The characteristic of this drill bit is that the overall buttons?are of uniform specifications. During the drilling process, all buttons?can participate in the work of crushing rocks in a relatively balanced manner.
l 6*?12+ 8*?13?means the?front buttons of?drill bit are?in??12, and?gauge buttons?are in ?13?size. This design takes into account the different stress conditions and crushing requirements at different positions of the?bit during drilling.
Difference in crushing effect
l For 18*?11: All the?buttons are the same size, the crushing capacity??is relatively balanced?when crushing rocks . It can maintain a relatively stable crushing efficiency when drilling rocks or materials with relatively uniform texture.
l For 6*?12+ 8*?13: The?gauge buttons are larger in size. During drilling, the gauge buttons?are mainly responsible for crushing the outer part of the rock. Due to large size, they can better cope with the resistance of the rock edge. So as to reduce the wear of the drill bit. The?front buttons?are slightly smaller.?Because the rock in the center is subjected to relatively greater extrusion force during drilling. Smaller buttons?can cut into the rock more easily and can reduce the excessive impact force on the front buttons. So as to?make?the overall crushing effect of the drill bit better.
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Applicable formation differences
18*?11 button design?is more suitable for drilling formations with uniform hardness and relatively simple texture.?While 6*?12+ 8*?13 is more suitable for complex formations. Especially those with uneven hardness and alternating soft and hard formations.
Service life?differences
l For 18*?11: The button?have the same specifications.?If the hardness is too high or the rock structure is complex, all the buttons?may be worn out simultaneously. This will affect the service life of the drill bit.
l For 6*?12+ 8*?13: The design of this drill bit can make the button?wear more evenly. During drilling, the?gauge buttons and?front buttons have?different sizes, and the pressure and friction they share are different. So that it?can better cope with different drilling resistances. Overall, it can extend the service life of the drill bit.
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Anyway, The choice of carbide button?design depends on the drilling environment, required performance, and economic considerations. Please contact us if you need advice: https://www.bestonedrill.com/contact-us/?