论文详情
我国南海和东海海域存在许多高温高压井，地层压力系数很高，普遍存在地层压力窗口窄，溢流和漏失同层，井控难度大，储层保护困难等难题，对海洋高温高压钻井的井筒压力控制提出了很大挑战。控压钻井可以有效解决海洋钻井中面临的窄钻井液密度窗口、高温高压、漏失地层、窄压力剖面等疑难杂症。而三段式伸缩节是浮式钻井装置进行控压钻井配套的最为关键设备之一，非常有必要进行国产化研制。文章阐述了“勘探三号”半潜式钻井平台控压钻井三段式伸缩节的研制，其成功应用于DF11-2-1d和DF11-2-2等井，实际使用效果良好，开创了控压钻井在我国海洋浮式钻井装置上成功使用的先河，填补了我国在该领域的空白，打破了国外垄断，增强了我国钻探海洋油气的能力。其设计、研制思路和方法可为我国其它浮式钻井装置的控压钻井配套提供借鉴。
There are many high temperature and high pressure wells in South China Sea and East China Sea, with high formation pressure coefficient, narrow formation pressure window, overflow and leakage in the same zone, difficult well control, difficult reservoir protection and other problems, which pose great challenges to the wellbore pressure control of offshore high temperature and high pressure drilling. Controlled pressure drilling can effectively solve the difficult problems in offshore drilling such as narrow drilling fluid density window, high temperature and high pressure, lost formation and narrow pressure profile. The three-section telescopic joint is one of the most important equipment for the controlled pressure drilling of floating drilling device, so it is necessary to develop it domestically. This paper describes the development of three-section telescopic joint for controlled pressure drilling of "Kantan 3" semi-submersible drilling platform, which has been successfully applied to Wells DF11-2-1d and DF11-2-2 with good practical application effect. It has created the first successful application of controlled pressure drilling in Chinese offshore floating drilling equipment, filled the gap in this field in China, broken the foreign monopoly, enhanced Chinese ability to drill for offshore oil and gas. The design, development ideas and methods can provide references for other controlled pressure drilling equipment of floating drilling equipment in China.