摘要
深水钻井施工风险高,成本高昂,需要研究科学的套管设计方法,以避免或减少因设计不合理而造成的井下事故与复杂情况。目前套管柱强度设计方法缺乏对深水钻井工艺条件的考虑,因此有必要进行深水套管柱载荷分布的研究,以弥补现有设计方法的不足。考虑深水作业过程中隔水管解脱、钻井液漏失、套管试压和固井等复杂工况,针对不同的工况,给出了套管内压、外挤及轴向等套管载荷的计算方法,并对国内一口深水井进行了实例分析。分析结果表明,原有的套管柱强度设计方法不能满足深水套管柱设计的要求,考虑深水特殊作业工况是正确选择套管柱的前提。该套管载荷的分析计算方法可用于陆地及浅海钻井套管柱设计。
Comparing to common offshore drilling and onshore drilling,deepwater drilling is more dangerous and expensive.It is imperative to develop a better casing design method,which can avoid or reduce down-hole accident caused by improper design.Since the scarce consideration of deepwater drilling features in SY/T 5724—2008 casing string strength design method,it is of great importance to research on a competent casing design methodology for deepwater drilling.In this paper the most dangerous operating conditions in deepwater drilling is considered,and burst,collapse and axial loads are analyzed and calculated.An example is given to show that the primary design method does not meet the need of deepwater casing design,and deepwater drilling conditions have a crucial influence on casing selection.This research achievement has also provided references to the design and application of the onshore and shallow water well casing strength design.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2011年第2期16-19,共4页
Oil Drilling & Production Technology
基金
国家科技重大专项"大型油气田及煤层气开发"子课题"深水钻井工程设计关键技术研究"(编号:2008ZX05026-001-01)的部分内容
关键词
深水套管
管柱设计
载荷
强度
deepwater casing
casing design
casing load
casing strength
