论文部分内容阅读
抗制动技术(AST)是一种以实时自动调整钻进扭矩为目的的井下机械方法。最初,由TomaxAS研发的这种工具是用于连续管的,已证明,它除了可以提高机械钻速和单只钻头进尺(Dagestad,V2006)外,还具有成功降低振动、马达制动、设备失效和一般磨损的能力。根据旋转钻井解决类似问题的需要,对该工具进行了进一步的开发,目的是消除在难钻地层中由切削齿诱导的扭矩振动和钻柱制动以及由此带来的有害作用。已定型的工具尺寸范围为6/34～8/14in。工具研制成功后,首先在试验井上试用。除了两次受控试验外,共进行了25次的现场应用,应用地区主要是挪威大陆架。所用工具具有各种不同的结构特点。从理论和现场应用两个方面详细讨论了是如何大幅降低由钻头诱导的扭矩波动从而提高机械钻速,以及为了提高单趟钻工作时间是如何避免井底钻具组合(BHA)损坏的。
Anti-Braking Technology (AST) is a downhole mechanical method that automatically adjusts the drilling torque in real time. Originally developed by TomaxAS, this tool was developed for continuous tubes and has been shown to be successful in reducing vibration, motor braking, equipment failure, in addition to improving ROP and single bit penetration (Dagestad, V2006) And the general ability to wear. The tool was further developed based on the need to solve similar problems with rotary drilling in order to eliminate the torque induced by the cutting teeth and the braking of the drill string and the resulting detrimental effects in difficult formations. Has been finalized tool size range of 6/34 ~ 8 / 14in. After the successful development of tools, the first test wells in the trial. In addition to the two controlled trials, a total of 25 field applications were conducted, mainly in the Norwegian continental shelf. The tools used have a variety of structural features. From theoretical and field applications, it is discussed in detail how to significantly reduce bit-induced torque ripple and thus ROP, and how to avoid BHA damage in order to improve single-pass drilling operation time.