整体气密封尾管悬挂器技术研究进展及发展建议

Research progress and development suggestions of integral liner hanger technology

摘要:

随着油气勘探开发不断往深井、超深井等高温高压井方向发展，油气行业对尾管悬挂器的整体气密封能力提出了更高的要求，常规的液压尾管悬挂器由于在本体上存在液缸传压孔及橡胶密封件，导致存在密封薄弱点，难以满足井筒长时间密封完整性及后期压裂等高压完井作业要求，为此，国外公司相继研发了整体气密封尾管悬挂器技术，对坐挂驱动机构设计进行了创新，尾管悬挂器本体采用一体式结构，不存在传压孔或密封件等密封薄弱环节，大幅提升了系统整体气密封能力。本文在对比常规液压尾管悬挂器结构组成的基础上，介绍了国外几种代表性的整体气密封尾管悬挂器结构原理和技术特点，总结分析了尾管悬挂器未来发展的趋势，提出了今后尾管悬挂器技术研发方向的几点建议。

Abstract:

With the continuous development of oil and gas exploration and development in the direction of deep wells， ultra-deep wells and other high-temperature and high-pressure wells， the oil and gas industry has put forward higher requirements for the overall gas sealing capability of the liner hanger. The conventional hydraulic liner hanger has a hydraulic cylinder on the body. Pressure transmission holes and rubber seals lead to weak sealing points， which make it difficult to meet the long-term sealing integrity of the wellbore and the high-pressure completion requirements such as fracturing in the later stage. For this reason， foreign companies have successively developed the integral gas-sealed liner hanger technology. Innovations have been made in the design of the seat-hanging drive mechanism. The body of the liner hanger adopts an integrated structure， and there are no sealing weak links such as pressure transmission holes or seals， which greatly improves the overall sealing capability of the system. On the basis of comparing the structural composition of conventional hydraulic liner hangers， this paper introduces the structural principles and technical characteristics of several representative integral air-tight liner hangers abroad， summarizes and analyzes the future development trend of liner hangers， and puts forward Some suggestions for the direction of liner hanger technology research and development in the future are given.