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| 1 | Limit analysis of extended reach drilling in South China Sea显示文摘Extended reach wells (ERWs), especially horizontal extended reach well with a high HD (horizontal displacement) to TVD (true vertical depth) ratio, represent a frontier technology and challenge the drilling limitations. Oil and gas reservoir in beaches or lakes and offshore can be effectively exploited by using extended reach drilling (ERD) technology. This paper focuses on the difficult technological problems encountered during exploiting the Liuhua 11-1 oil fi eld in the South China Sea, China. Emphasis is on investigating the key subjects including prediction and control of open hole limit extension in offshore ERD, prediction of casing wear and its prevention and torque reduction,φ244.5mm casing running with floating collars to control drag force, and steerable drilling modes. The basic concept of limit extension in ERD is presented and the prediction method for open hole limit extension is given in this paper. A set of advanced drilling mechanics and control technology has been established and its practical results are verifi ed by fi eld cases. All those efforts may be signifi cant for further investigating and practicing ERD limit theory and control technology in the future. | Gao Deli Tan Chengjin Tang Haixiong | 2009 | Petroleum Science2009，6，2： | 17 |
| 2 | 2020 Roadmap on two-dimensional nanomaterials for environmental catalysis显示文摘Environmental catalysis has drawn a great deal ofattention due to its clean ways to produce useful chemicals or carry out some chemical processes.Photocatalysis and electrocatalysis play important roles in these fields.They can decompose and remove organic pollutants from the aqueous environment,and prepare some fine chemicals.Moreover,they also can carry out some important reactions,such as 02 reduction reaction(ORR),O2 evolution reaction(OER),H2 evolution reaction(HER),CO2 reduction reaction(C02 RR),and N2 fixation(NRR).For catalytic reactions,it is the key to develop high-performance catalysts to meet the demand fortargeted reactions.In recentyears,two-dimensional(2 D) materials have attracted great interest in environmental catalysis due to their unique layered structures,which offer us to make use of their electronic and structural characteristics.Great progress has been made so far,including graphene,black phosphorus,oxides,layered double hydroxides(LDHs),chalcogenides,bismuth-based layered compounds,MXenes,metal organic frameworks(MOFs),covalent organic frameworks(COFs),and others.This content drives us to invite many famous groups in these fields to write the roadmap on two-dimensional nanomaterials for environmental catalysis.We hope that this roadmap can give the useful guidance to researchers in future researches,and provide the research directions. | Yulu Yang Mingguang Wu Xingwang Zhu Hui Xu Si Ma Yongfeng Zhi Hong Xia Xiaoming Liu Jun Pan Jie-Yinn Tang Siang-Piao Chai Leonardo Palmisano Francesco Parrino Junli Liu Jianzhong Ma Ze-Lin Wang Ling Tan Yu-Fei Zhao Yu-Fei Song Pardeep Singh Pankaj Raizada Deli Jiang Di Li R.A.Geioushy Jizhen Ma Jintao Zhang Song Hu Rongjuan Feng Gang Liu Minghua Liu Zhenhua Li Mingfei Shao Neng Li Jiahe Peng Wee-Jun Ong Nikolay Kornienko Zhenyu Xing Xiujun Fan Jianmin Ma | 2019 | Chinese Chemical Letters2019，30，12： | 2 |
| 3 | Blue-White Colony Selection of Virus-Infected Isogenic Recipients Based on a Chrysovirus Isolated from Penicillium italicum显示文摘Mycoviruses have been found to infect more than 12 species of Penicillium,but have not been isolated from Penicillium italicum(P.italicum).In this study,we isolated and characterized a new double-stranded RNA(dsRNA)virus,designated Penicillium italicum chrysovirus 1(PiCVl),from the citrus pathogen P.italicum HSPi-YNl.Viral genome sequencing and molecular characterization indicated that PiCV 1 was highly homologous to the previously described Penicillium chrysogenum virus.We further constructed the mutant HSPi-YNl ApksP defective in the polyketide synthase gene(pksP),which is involved in pigment biosynthesis,and these mutants formed albino(white)colonies.Then we applied hyphal anastomosis method to horizontally transmit PiCV 1 from the white virus-donors(i.e.,HSPi-YNl mutants)to wild-type recipients(i.e.,P.italicum strains HSPi-CQ54,HSPi-HB4,and HSPi-HNl),and the desirable PiCV 1-infected isogenic recipients,a certain part of blue wild-type strains,can be eventually selected and confirmed by viral genomic dsRNA profile analysis.This bluewhite colony screening would be an easier method to select virus-infected P.italicum recipients,according to distinguishable color phenotypes between blue virus-recipients and white virus-donors.In summary,the current work newly isolated and characterized PiCVl,verified its horizontal transmission among dually cultured P.italicum isolates,and based on these,established an effective and simplified approach to screen PiCV 1-infected isogenic recipients. | Tingfu Zhang Na Li Yongze Yuan Qianwen Cao Yanfen Chen Binglan Tan Guoqi Li Deli Liu | 2019 | Virologica Sinica2019，34，6： | 2 |
| 4 | Critical condition study of borehole stability during air drilling显示文摘The purpose of this paper is to establish the existence of the critical condition of borehole stability during air drilling. Rock Failure Process Analysis Code 2D was used to set up a damage model of the borehole excavated in strain-softening rock. Damage evolution around the borehole was studied by tracking acoustic emission. The study indicates that excavation damaged zone (EDZ) is formed around borehole because of stress concentration after the borehole is excavated. There is a critical condition for borehole stability; the borehole will collapse when the critical damage condition is reached. The critical condition of underground excavation exists not only in elastic and ideal plastic material but in strain- softening material as well. The research is helpful to developing an evaluation method of borehole stability during air drilling. | Deng Jingen Zou Linzhan Tan Qiang Yan Wei Gao Deli Zhang Hanlin Yan Xiuliang | 2009 | Petroleum Science2009，6，2： | 1 |
| 5 | A new solution to enhance cuttings transport in mining drilling by using pulse jet mill technique显示文摘In horizontal drilling, the cuttings bed is frequently formed to result in severe problems such as backing pressure, binding of bottom hole assembly(BHA) and even sticking of tool. Practice and research show that the smaller particle size is, the more favorable to carry out from bottom of hole in extended reach well or horizontal well. This paper presented a new solution to enhance cuttings transport in mining drilling through a new type of bit called pulsed mill bit(PMB) by using pulse jet mill technique. It provides a promising solution to enhance the efficiencies of rock breaking and cuttings carrying for pulsed jet,sucking cuttings to decrease the chip hold down effect, and reducing cuttings' diameter to eliminate cuttings bed. The design was supported by the calculation models of Helmholtz resonator natural frequency, optimal drilling fluid flow rate of resonator,drilling fluid flow velocity in forward jet channel, critical impact velocity of cuttings and minimum length of the accelerating cavity. Meanwhile, factors affecting optimal drilling fluid flow rate, critical impact velocity of cuttings and minimum length of accelerating cavity were investigated. Case study showed a good consistency between the calculation results and the related theories. It is concluded that optimal drilling fluid flow rate increases with the increase of inlet and outlet cavity's diameter, and decreases with the increase of the diameter of the resonant cavity. Critical impact velocity of cuttings increases with the energy conversion factor(β) and ROP, while decreasing with the final size of the cuttings(d_t). This effect is obvious when β<0.2, ROP<3.048 mh^(-1) and d_t<0.3 mm. Minimum length of the accelerating cavity decreases with the increase of the resonator's natural frequency and separation coefficient(α) of drilling fluid flow rate. This study provides a promising solution to remove cuttings bed in horizontal well. | LIU YongSheng GAO DeLi WEI Zheng BALACHANDRAN Balakumar WANG ZhenQuan TAN LeiChuan | 2019 | Science China(Technological Sciences)2019，62，5： | 1 |
| 6 | Application of 3D modeling and printing technology in accurate resection of complicated thoracic tumors显示文摘To explore the application value of 3D reconstruction and 3D printing in preoperative evaluation of precise resection of complicated thoracic tumors.A retrospective analysis of 34 patients with complicated thoracic tumors who were treated by radical surgery from March 2016 to June 2019 was made.According to whether 3D reconstruction and 3D printing was used,the patients were divided into research group and control group.In the control group,preoperative evaluation was performed according to CT image data,and the operation plan was drawn up;in the research group,preoperative simulation and preoperative operation plan design were carried out according to 3D reconstruction and 3D printing technology.T he operation time,change of operation approach,intraoperative blood loss,hospitalization time and postoperative complications were compared between the two groups.We also retrospectively reviewed additional 12 cases of unresectable complicated thoracic tumors.The above 34 patients who were treated by radical surgery were set as the resectable group. | Wu Yi Wu Wei Tan Deli Yao Jie Hua Xing Li Jingyao Xu Zhou | 2021 | 解剖学杂志2021，44，S01： | 0 |
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