drill collar

Using steel tube making by this process ensures the stability of the drill collar.

另外因采用该工艺生产的钢管用料,也保证了加工企业钻铤质量的稳定性.

In drilling exploration and well drilling Industry, the drilling pipe and drill collar are key apparatus.

钻杆和钻铤等管状螺纹连接件,是钻探和石油钻井工业中的关键设备.

This heavy-duty type drill collar lifting sub is designed for use with the drill pipe elevators.

重型钻铤提升短节与钻杆吊卡一起用来上吊钻具.

A study on load distribution at a drill collar threaded connection

钻铤螺纹联接处载荷分布规律研究

Development and application of high-strength drill collar threaded connection

高强度钻铤螺纹的研制及应用

Drilling operation in this well was faced with many big challenges, mainly including low ROP, thread gluing of drill collar, drilling tool breaking, large formation dip, enlargement of well deviation, as well as difficult well trajectory control.

该井施工难度大，主要表现在机械钻速缓慢、易出现钻铤粘扣、断钻具，地层倾角大井斜上升问题突出，井身轨迹控制困难。

And on the other hand, drill pipes with low strength and optimum pretensioned torque and proper bending strength ratio should be selected, upset drill pipe should be used between drill collar and drill stem, and corrosion control and drill tools detection should be strengthened.

另一方面在保证提升能力前提下优先选用低强度钻杆，使用最佳预紧扭矩，选择合适的弯曲强度比，在钻艇和钻杆之间使用加重钻杆，控制腐蚀以及加强钻具的探伤与检验。

MS brand drill collar are manufactured strictly from API Spec . 7 and SY 5144 standard.

牡石牌钻铤完全采用API规范及SY5144标准生产.

On the basis of an analysis of the location and causes of the failure of drill collar threaded connection, a high-strength drill collar threaded connection is developed.

在分析钻铤螺纹失效部位及原因的基础上，研制了高强度钻铤螺纹，它与普通钻铤螺纹相比，只是在外螺纹小端增加了一段光平的锥体。

Development of Steel for Drill Collar AISI 4145H

AISI4145H钻铤用钢的研制

We need a short drill collar to put here.

这里要接一根短钻铤.