深井钻机在下钻或下套管作业中，绞车电磁制动一旦失灵可能造成严重事故。
When the drawworks's electromagnetic brake is out of work in drilling or casing operation, serious accident will happen.
该系统实现无人监控、自动记录、绘制紧扣转矩—圈数曲线，可方便、直观地反映下套管作业的全过程及有问题套管所处的位置。
The system can record and plot the make up torque turn curves automatically, and it also can monitor whole process of casing job and find out the location of the casing with trouble.
通过对模型的求解，可以得到不同井眼类型、泥浆密度、悬浮长度以及不同下套管方案下的套管受力，为大位移井下套管作业提供了力学参考。
By solving the mechanical model, the casing bearing forces can be obtained under the conditions of different hole types, mud density, casing suspension length and casing running ways.
该扶正器最初的设计目的在于替换固体式扶正器，用于下套管作业，以及复杂井身结构，如水平井、大位移井、J -型井、S -型井和具有其他井身结构设计的井。
It is designed specifically to replace a solid body type centralizer for casing running applications and severe well geometries when run in horizontal, long ERD, J-type, S-type and other well designs.
套管开窗是分支井作业的关键步骤，开窗质量对后续工具的下入至关重要。
Casing opening is the key procedure in multilateral operations. Opening quality is quite important for subsequent tools to enter into the laterals.
另外，在没有安装任何套管或衬管的情况下，在储层段的选择性处理或补救作业则更为困难。
Also, without any casing or liner installed, selective treatments or remedial work within the reservoir section are more difficult.
试验井三叠系、石炭系平均井径扩大率小于6%，完井电测及下套管固井等作业顺利。
Hole enlargement through the Tertiary system and the Carboniferous system in test Wells are less than 6%, therefore, got a successful completion logging and running casing strings.
对己经下入了C110油套管的井，防止后期作业诱发裂纹至关重要，新的设计方法对油气田在油套管的选材上具有重要参考价值。
For the well with C110, it is important to prevent cracks in late workings. So this new design method provides great reference value for Wells to choose proper casing material.
对己经下入了C110油套管的井，防止后期作业诱发裂纹至关重要，新的设计方法对油气田在油套管的选材上具有重要参考价值。
For the well with C110, it is important to prevent cracks in late workings. So this new design method provides great reference value for Wells to choose proper casing material.
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