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Rotational failure analysis of spherical-cylindrical shell pressure controllers related to gas hydrate drilling investigations 被引量:2
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作者 Cong Li Jian-Liang Pei +6 位作者 Nian-Han Wu Gui-Kang Liu Wei Huang Zhi-Xu Dai Rui-Ze Wang Zhao-Fan Chen Wei-Cheng Long 《Petroleum Science》 SCIE CAS CSCD 2022年第2期789-799,共11页
In situ pressure-preserved coring(IPP-Coring)technology is considered one of the most efficient methods for assessing resources.However,seal failure caused by the rotation of pressure controllers greatly affects the s... In situ pressure-preserved coring(IPP-Coring)technology is considered one of the most efficient methods for assessing resources.However,seal failure caused by the rotation of pressure controllers greatly affects the success of pressure coring.In this paper,a novel spherical-cylindrical shell pressure controller was proposed.The finite element analysis model was used to analyze the stress distribution and deformation characteristics of the pressure controller at different rotation angles.The seal failure mechanism caused by the rotation of the pressure controller was discussed.The stress deviation rate was defined to quantitatively characterize the stress concentration.Based on the test equipment designed in this laboratory,the ultimate bearing strength of the pressure controller was tested.The results show that the rotation of the valve cover causes an increase in the deformation on its lower side.Furthermore,the specific sealing pressure in the weak zone is greatly reduced by a statistically significant amount,resulting in seal failure.When the valve cover rotates 5°around the major axis,the stress deviation rate is-92.6%.To prevent rotating failure of the pressure controller,it is necessary to control the rotation angle of the valve cover within 1°around the major axis.The results of this research can help engineers reduce failure-related accidents,provide countermeasures for pressure coring,and contribute to the exploration and evaluation of deep oil and gas resources. 展开更多
关键词 Exploration of oil and gas resources Pressure coring controller Sphere flapper valve Failure modes Stress deviation rate
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Key technologies and practice for gas field storage facility construction of complex geological conditions in China 被引量:6
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作者 MA Xinhua ZHENG Dewen +3 位作者 SHEN Ruichen WANG Chunyan LUO Jinheng SUN Junchang 《Petroleum Exploration and Development》 2018年第3期507-520,共14页
In view of complex geological characteristics and alternating loading conditions associated with cyclic large amount of gas injection and withdrawal in underground gas storage(UGS) of China, a series of key gas storag... In view of complex geological characteristics and alternating loading conditions associated with cyclic large amount of gas injection and withdrawal in underground gas storage(UGS) of China, a series of key gas storage construction technologies were established, mainly including UGS site selection and evaluation, key index design, well drilling and completion, surface engineering and operational risk warning and assessment, etc. The effect of field application was discussed and summarized. Firstly, trap dynamic sealing capacity evaluation technology for conversion of UGS from the fault depleted or partially depleted gas reservoirs. A key index design method mainly based on the effective gas storage capacity design for water flooded heterogeneous gas reservoirs was proposed. To effectively guide the engineering construction of UGS, the safe well drilling, high quality cementing and high pressure and large flow surface injection and production engineering optimization suitable for long-term alternate loading condition and ultra-deep and ultra-low temperature formation were developed. The core surface equipment like high pressure gas injection compressor can be manufactured by our own. Last, the full-system operational risk warning and assessment technology for UGS was set up. The above 5 key technologies have been utilized in site selection, development scheme design, engineering construction and annual operations of 6 UGS groups, e.g. the Hutubi UGS in Xinjiang. To date, designed main indexes are highly consistent with actural performance, the 6 UGS groups have the load capacity of over 7.5 billion cubic meters of working gas volume and all the storage facilities have been running efficiently and safely. 展开更多
关键词 gas field STORAGE trap dynamic SEALING capacity key index design effective STORAGE volume drilling and COMPLETION in ultra-deep and ultra-low pressure formation ALTERNATING load surface engineering core equipment risk assessment and control
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STM32F101VB微处理器在气相色谱仪中的应用
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作者 杨胜锋 梁月华 《电子科技》 2014年第8期125-127,共3页
由于传统的气相色谱仪外围接口电路存在不通用缺陷,且控制核心单片机无法满足现代气相色谱仪对多维图谱大量数据处理的要求。针对上述问题,研究了一种基于STM32F101VB微处理器的气相色谱仪控制电路。该微处理器使用高性能的ARM Cortex-M... 由于传统的气相色谱仪外围接口电路存在不通用缺陷,且控制核心单片机无法满足现代气相色谱仪对多维图谱大量数据处理的要求。针对上述问题,研究了一种基于STM32F101VB微处理器的气相色谱仪控制电路。该微处理器使用高性能的ARM Cortex-M3 32位的RISC内核,具有增强I/O端口和APB总线的功能,适用于气相色谱仪的新型控制核心。该设计满足了现代气相色谱仪对通用接口和多维大量数据处理的要求。 展开更多
关键词 STM32F101VB微处理器 外围电路 气相色谱仪控制核心
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