原油价格的波动是钻井技术持续发展的动力 ,但钻井技术自身的发展并不依赖油价。为了进一步优化钻井过程 ,尤其是深水钻井作业 ,我们开发出了套管钻井系统。套管钻井系统 (“CDS”)改变了传统的钻井工艺 ,节省了钻机在用时间。该系统的主要设计目的是为了解决在海洋平台和陆地钻丛式井组、深水钻井作业以及在易出问题地层快速钻进和下套管等问题。该系统既包括了传统的井下工具 ,如钻头、泥浆马达、MWD/LWD仪器 ,也包括新开发的一些井下工具。这个系统可在任何一种钻机上使用 ,可钻各种尺寸的井眼 ,并可以使用钢丝绳或钻杆回收井下套管钻井总成。本文叙述了这种套管钻井系统中使用的工具及其作业过程。初步的现场实钻数据显示了该系统的实用价值 ,同时也得到了一些经验教训 The fluctuation of crude oil price is the driving force for the sustainable development of drilling technology, but the development of drilling technology itself does not depend on the price of oil. To further optimize the drilling process, especially for deepwater drilling operations, we developed a casing drilling system. The Casing Drilling System (“CDS”) has changed the traditional drilling process, saving on rig time. The system’s primary design objective is to address issues such as deep-sea drilling operations in offshore platforms and land-drilling cluster wells, as well as rapid drilling and casing management in areas prone to problems. The system includes both traditional downhole tools such as drill bits, mud motors, MWD / LWD instruments and some of the newly developed downhole tools. This system can be used on any type of rig, drills various sizes of boreholes, and can use wire ropes or drill pipes to recover a downhole casing drilling assembly. This article describes the tools used in this casing drilling system and their operation. Preliminary field drilling data show the practical value of the system, but also learned some lessons