1，滑动轴承。 硬面头轴承表面。 锥轴承镶嵌有减摩合金，然后镀银。 轴承的负载容量和耐发热胶着性得到很大提高。 2，高耐磨性和插入位的优良切削能力通过使用高强度和高韧性的结合优化紧凑号码和行，曝光高度和异形坯碳化物压块得到充分发挥。 对于钢齿位，齿面是硬面与新型的耐磨材料，从而延长了切削结构的工作寿命，同时保持高的ROP。 3，HJ系列位采用了最先进的密封技术在世界上，我。 即 金属面密封（MFS）。 它可以在高速钻孔应用持续进行，并且是钻定向井和水平井的理想工具。 与常规的橡胶O形圈密封的位进行比较，平均在相同的操作参数的条件下工作的HJ系列钻头寿命（总钻削小时）可以被提高35％。

钻头直径（中）：6 1/2
位直径（mm）：165.1
IADC代码：437447
API RGE：3 1/2“
适用地层：
软地层具有低的压缩强度和高可钻性，如softshale，粘土，盐，石灰石软等
推荐钻井参数
WOB（KN /毫米）：0.35〜1.00
（位直径）
转速r /毫米：280〜70
N.W。 （KG）：17
G.W. （KG）：18
尺寸（mm）：205 * 205 * 350

1, Journal bearing. Hardfaced head bearing surface. Cone bearing inlaid with friction reducing alloy and then silver-plated. The load capacity and seizure resistance of the bearing is greatly improved. 2, High wear resistance and excellent cutting ability of the insert bit are given full play by using carbide compacts of high strength and high toughness in combination with optimized compact numbers and rows, the exposure height and special shaped compacts. For steel tooth bit, the tooth surface is hardfaced with new type of wear resistant material and thus extended working life of the cutting structure while maintaining high ROP. 3, HJ series bit uses the most advanced sealing technology in the world, i. e. the metal face seal (MFS) . It can perform consistently in high speed drilling applications, and is the ideal tool for drilling directional and horizontal wells. In comparison with conventional rubber O-ring sealed bits, the average working life (total drilling hours) of HJ series bit under the condition of the same operating parameters can be increased by 35%.

BIT Diameter (In) : 6 1/2
BIT Diameter (mm) : 165.1
IADC CODE : 437447
API RGE: 3 1/2″
Applicable Formations:
soft formation with low compressive strength and high drillability, such as softshale, clay, salt, soft limestone , etc
Recommended Drilling Parameters
WOB (kn/ mm) : 0.35~1.00
(bit dia)
Speed r/ mm: 280~70
N.W. (KG) : 17
G.W. (KG) : 18
Size (mm) : 205*205*350