1.三牙轮钻头（高韧性和耐用性适合不同岩层）

三牙轮钻头切削结构：很长的间隔较宽，凿形刀片和相当大锥轴偏移量对位的中心线确保很高的普及率。 为了确保从直径损失该位，保径镶已经得到了更短的长度和顶部的更大的角度。 阵型：长间隔很软很差压实的页岩，砂岩，粘土，盐和软李mestones。 大小和IADC可供选择：3 3/4 26''

TCI 437 软地层TCI牙轮钻头

437 TCI位用于钻低抗压强度非常软地层TCI位尽量采用大直径和高值预测bothconical和凿子钨硬质合金刀片。 这种切削结构设计，结合最大锥偏移，导致高比特渗透率。 的刀行深压弯防止想逃位在粘地层。

TCI 517 介质形成TCI牙轮钻头

在517特征侵略性凿碳化钨插入脚跟行和内部行这样的设计提供了一种快速钻孔速率和加入切割结构耐久性在介质到介质很难mations的HSN橡胶O形环提供足够的密封轴承的耐久性。

TCI 617 特克斯和凯科斯群岛617功能强大的凿钨脚跟行和圆锥形的内部行硬质合金刀片。 这种设计提供了快速钻井速度并增加切割介质结构耐久性至中硬地层。 在HSN橡胶O型凛提供足够的密封轴承的耐用性。

TCI 637 可用于钻硬和磨料形式上-系统蒸发散。 穿耐碳化钨刀片被用于所述外围行，以防止位计的损失。 半球型刀片最大的数字被用在所有行提供刀具的耐用性和寿命长。

2.照片档案与细则的：

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5，付款方式

T / T和L / C是可以接受的。 （后30％预付款签署contranct，然后70％付款后，看到B / L）

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7.运输

1. Tricone bit (high toughness and durability suitable for different rock formation)

tricone bit Cutting structure: very long widely spaced , chisel-shaped inserts and considerable cone axis offset against center line of bit ensure very high penetration rate . To secure the bit from diameter loss, the gage protection inserts have got shorter length and greater angle of the top. Formations: long intervals of very soft poorly compacted shales , sandstone, clays, salts and soft li mestones. Size and IADC available: 3 3/4 to 26''

TCI 437 soft formation tci tricone bits

The 437 tci bits are used to drill low compressive strength very soft formation tci bits maximize the use of bothconical and chisel tungsten carbide inserts of large diameters and high projection. This cutting structure design combined with maximum cone offset , results in high bit penetration rates. the deep intermesh of cutter rows prevents bit bailing in sticky formations.

TCI 517 medium formation tci tricone bits

The 517 features aggressive chisel tungsten carbide inserts on the heel rows and inner rows this design provides a fast drilling rate and added cutting structure durability in medium to medium hard for mations the HSN rubber o-ring provides adequate sealing for bearing durability.

TCI 617 the tci 617 features robust chisel tungsten carbide inserts on the heel row and conical on the inner rows . this design provides a fast drilling rate and added cutting structure durability in medium to medium hard formations . the HSN rubber o-rin provides adequate sealing for bearing durability .

TCI 637 can be used to drill hard and abrasive forma-tions . wear –resistant tungsten carbide inserts are used in the outer rows to prevent loss of bit gauge. maximum numbers of hemispherical-shaped inserts are used in all rows to provide cutter durability and long life.

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T/ T and L/ C are acceptable. (30% advanced payment after sign the contranct , then 70% payment after see the B/ L)

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