GHJ系列三牙轮位，石油钻井金属密封轴承系统。

主要结构特点：

1.本系列采用非等距牙齿安置与优化的牙高度和形状的组合。

2.运用世界最新的密封技术，金属面密封，确保轴承的轴承密封更有效，也更适合在高转速和高TEM-perature工作状态钻。

3.新materl施加在栅极保护，和rducing从油井壁上摩擦的部分; 改善井壁的质量，保护腿和密封件的背面。

4.位的熊enhancedtreatment，并延长TE位的工作寿命，降低了钻井成本。

GHJ系列三conerock位油井钻探的主要参数：

键入IADC位施（英寸）标准的API针柄尺寸（英寸）怀特（KG）

8-1 / 2GHJ437T 437 8-1 / 2 4-1 / 2REG 42

8-1 / 2GHJ447T 447 8-1 / 2 4-1 / 2REG 42

8-1 / 2GHJ517T 517 8-1 / 2 4-1 / 2REG 42

8-1 / 2GHJ437G 437 8-1 / 2 4-1 / 2REG 42

8-1 / 2GHJ517G 517 8-1 / 2 4-1 / 2REG 42

9-12GHJ437T 437 9-1 / 2月六日至五号/ 8REG 60

9-1 / 2GHJ447T 447 9-1 / 2月6号至五号/ 8REG 60

9-1 / 2GHJ517T 517 9-1 / 2月6号至五号/ 8REG 60

9-1 / 2GHJ437G 437 9-1 / 2月6号至五号/ 8REG 60

9-1 / 2GHJ51G 517 9-1 / 2月6号至5日/ 8REG 60

12-1 / 4GHJ437T 437 12-1 / 4月6号至5号/ 8REG 98

12-1 / 4GHJ517T 517 12-1 / 4月6号至5号/ 8REG 98

GHJ系列三牙轮位钻井的钻井参数：

1，非常柔软，低抗压强度，如软泥灰岩，粘土，松散的沙尘暴，盐等。

推荐位类型：GHJ437，钻重：0.35〜0.90 KN /毫米，转速，300〜60转/分。

2，软低comprssive强度，如页岩，粘土，sadstne，软石灰石等。

推荐位类型：GHJ517，钻重：0.35〜1.05 KN /毫米，转速250〜60转/分。

3，中软中带硬的磨料treak，如硬页岩，软石灰石，砂石等

推荐位类型：GHJ537，钻重0.5〜1.05 KN /毫米，转速，200〜40转/分。

GHJ series tri-cone rock bits with metal-sealing bearing system for oil well drilling.

Main structure features:

1. This series adopts non-isometry teeth placement in combination with optimized teeth height and shape.

2. Applying the world's latest sealing technology, metal face sealing ensures the bearing the bearing sealing is more efficient, and more suitable for drilling at high rotary speed and high tem-perature working condition.

3. New materl is applied on the part of gate protecting, and rducing the friction from oil well wall; improving quality of well wall, protecting the back of leg and seal.

4. Bit's bear is enhancedtreatment, and prolonging te bit working life, reducing the drilling cost.

Main parameters of GHJ series tri-conerock bits for oil well drilling:

Type IADC Bit Sze (inch) Standard API pin shank size (inch) Wight (KG)

8-1/2GHJ437T 437 8-1/2 4-1/2REG 42

8-1/2GHJ447T 447 8-1/2 4-1/2REG 42

8-1/2GHJ517T 517 8-1/2 4-1/2REG 42

8-1/2GHJ437G 437 8-1/2 4-1/2REG 42

8-1/2GHJ517G 517 8-1/2 4-1/2REG 42

9-12GHJ437T 437 9-1/2 6-5/8REG 60

9-1/2GHJ447T 447 9-1/2 6-5/8REG 60

9-1/2GHJ517T 517 9-1/2 6-5/8REG 60

9-1/2GHJ437G 437 9-1/2 6-5/8REG 60

9-1/2GHJ51G 517 9-1/2 6-5/8REG 60

12-1/4GHJ437T 437 12-1/4 6-5/8REG 98

12-1/4GHJ517T 517 12-1/4 6-5/8REG 98

Drilling parameters of GHJ series tri-cone rock bits for well drilling:

1, Very soft with low compressive strength, such as soft marl, clay, unconsolidated sandstorm, salt, etc.

Recommended Bit type: GHJ437, Drilling weight: 0.35~0.90 KN/ mm, Rotary speed, 300~60 r/ m.

2, Soft with low comprssive strength, such as shale, clay, sadstne, soft limestone, etc.

Recommended Bit type: GHJ517, Drilling weight: 0.35~1.05 KN/ mm, Rotary speed, 250~60 r/ m.

3, Medium soft with hard abrasive treak, such as hard shale, soft limestone, sandstone, etc.

Recommended Bit type: GHJ537, Drilling weight 0.5~1.05 KN/ mm, Rotary speed, 200~40 r/ m.