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Le Zhao,Yulin Tu,Heping Xie,Mingzhong Gao,Fei Liu 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.44 No.2
This study discusses challenges of running expandable profile liners (EPLs) to isolate trouble zones in directional section of a deep well, and summary the expandable profile liner technology (EPLT) field trial experience. Technically, the trial result reveals that it is feasible to apply the EPLT solving lost-circulation control problem and wellbore instability in the deep directional section. Propose schemes for optimizing the EPLT operation procedure to break through the existing bottleneck of EPLT in the deep directional section. Better-performing transition joints are developed to improve EPL string reliability in high borehole curvature section. High-performing and reliable expanders reduce the number of trips, offer excellent mechanical shaping efficiency, simplify the EPLT operation procedure. Application of the expansion and repair integrated tool could minimize the risk of insufficient expansion and increase the operational length of the EPL string. The new welding process and integrated automatic welding equipment improve the welding quality and EPL string structural integrity. These optimization schemes and recent new advancements in EPLT can bring significant economic benefits and promote the application of EPLT to meet future challenges.
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Chengfang Qiao,Xia Gao,Qi Tang,Jianfang Wang,Yulin Gao,Meili Zhang,Zhengqiang Xia,Haitao Han,Chunxin Zhao,Chunsheng Zhou 대한화학회 2020 Bulletin of the Korean Chemical Society Vol.41 No.12
A bifunctional lead(II)-acylhydrazone coordination polymer featuring 3D hydrogen-bonded framework exhibits intense blue luminescence and remarkable inhibitory effect on the fusarium fungi.
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Shen Qiaoqiao,Luo Xiangping,Feng Xiangang,Gao Yulin 한국간호과학회 2022 Asian Nursing Research Vol.16 No.3
Purpose: The aim of this paper is to develop a scale for measuring the perinatal bereavement care competence of midwives and assess its psychometric properties. Methods: The Perinatal Bereavement Care Competence Scale was developed in four phases. (1) Item generation: 75 items were formulated based on a literature review and interviews with midwives. (2) Delphi expert consultation: 15 experts evaluated whether the items were clear/appropriate/relevant to the questionnaire dimensions, and the items were optimized. (3) Pilot test: The comprehensibility, acceptability, and time required to complete the questionnaire by midwives were assessed. (4) Evaluation of reliability and validity: The scale was validated by initial item analysis, exploratory and confirmatory factor analyses, and internal consistency reliability and testeretest reliability. Results: The final scale consisted of six dimensions and 25 items: maintaining belief (three items), knowing (four items), being with (six items), preserving dignity (four items), enabling (five items), and self-adjustment (three items). Exploratory factor analysis yielded a six-factor structure that was consistent with the theoretical framework and explained 70.8% of the total variance. Confirmatory factor analysis indicated a good fit for the six-factor model. Cronbach's a for the scale was 0.931, and the test eretest reliability coefficient was 0.968. Conclusion: The Perinatal Bereavement Care Competence Scale is a valid and reliable instrument for measuring the competence of midwives in caring for bereaved parents who have experienced perinatal loss.
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