drill collar

research on a new stress relief groove of drill collar threaded connections

新型石油钻铤联接螺纹减应力区的研究

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do not make up or break out the bit on a single joint of dc. if this is absolutely necessary, always snub drill collar with the air tugger.

不要在一单根钻铤上卸钻头，如果确实需要这样做，要用气动绞车拉住钻铤。

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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。

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drill collar narrow gap consumable electrode impulse automatic gas-shielded welding

钻铤窄间隙熔化极脉冲气体保护自动焊工艺

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fit the rig tongs with the correct jaws for the drill pipe tool joint or the drill collar. re-install the safety lock springs.

给大钳装上与钻杆接头或钻铤相匹配的钳头，再装上安全锁簧。

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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

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the engineer used a non magnetic drill collar in the oil well.

工程师在油井中使用了无磁钻铤。

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Development and application of high-strength drill collar threaded connection

高强度钻铤螺纹的研制及应用

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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。

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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。

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Development of Steel for Drill Collar AISI 4145H

AISI4145H钻铤用钢的研制

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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.

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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.

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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.

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We need a short drill collar to put here.

这里要接一根短钻铤.

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a log similar to a dual induction log but made by an electromagnetic propagation tool built into a drill collar.

与双感应测井类似的一种测井方法，用安装在钻铤中的电磁传播仪进行测量。

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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.

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as such, magnetic particle inspection for the screw thread of the drill collar is very necessary and important.

因而钻铤内外螺纹的磁粉检测十分必要和重要。

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