Lesson 24 Drilling System

Keywords and Expressions

Well objective：钻井目标

Well planning：油井设计

Rig selection：钻机选择

Rotary drilling：旋转钻井

Drill string：钻柱

Drilling fluid：钻井液

PDC bit(polycrystalline diamond 　cutter)：人造金刚石钻头

Hoisting：提升

Circulation：循环

Casing：套管

Cementing：固井

Drilling costs：钻井费用

Drilling operations are carried out during all stages of field development and in all types of environments. The main objectives are the acquisition of information and the safeguarding of production. Expenditure for drilling represents a large fraction of the total project's capital expenditure (typically 20% to 40%) and an understanding of the techniques， equipment and cost of drilling is therefore important.

24.1　Well Planning

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