supply ZJSB brand spiral drill collar
原价: 6 800 USD
July xu
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基本信息
| 出生地 | Henan China (Mainland) |
|---|---|
| 牌子的名字 | ZJSB |
| 模式的数量 | 79.4*31.8*9150 |
| 类型 | 钻头领 |
| 机器型号 | 钻探工具 |
| 验证 | 研究所 |
| 材料 | 高锰铁 |
| 处理类型 | 建立 |
| 使用 | 钻井 |
ZJSB Sprial Drill Collars are manufactured from 4145H modified alloy steel . The full length of heat treatment adopts the original medium frequency inductance heating method. Strict metallurgical specifications are followed to insure that full length heat treating produces a consistent maximum depth of hardness. After this, a hardness range of 285 to 341 BHN are guaranteed one inch below the surface at room temperature.The bores are held to close tolerances by trepanning and are drifted to API specifications. The minimum external surface finish is hot-rolled and mill-finished. Connections are machined to API specifications and monogrammed with the API symbol. Connections are also machined to prevent galling. Thread roots are cold rolled to provide longer fatigue life.
交货条款及包装
Packaging Detail: nude packing or wood packing for reference Delivery Detail: about 15days
端口: tianjin
付款条款
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