Specialized pipe cutting technology is required to repair damaged seabed oil and gas pipelines because common underwater cutting methods have difficulty working.
海底石油管道出现损坏时,在维修过程中需要将管道切断,采用常用的水下切割方法很难完成切割工作,文中提出了水下金刚石绳锯机切割技术。
This paper introduces underwater inspection technology and disaster treatment craft,underwater inspection and survey,underwater cutting and chiseling work,underwater erection of anchor rod,underwater welding and concrete pouring.
介绍了水下检查技术与病害治理工艺以及水下检查与测量,水下切割与凿除作业,水下锚筋架设,水下焊接和水下混凝土浇筑;介绍了水下检查、维护与修理的可实施与可操作性,为水下结构物病害的防治,提供了一套科学、可靠的技术和工艺。
Using diamond wire saw,underwater cutting experiment of seabed oil steel tube was conducted.
搭建了金刚石串珠绳锯水下切割试验系统,设置了初始试验参数,分析了管道不同部位切割时,切割面积和切口宽度与绳锯进给速度的关系。
Effect of artificial step-pools on improving aquatic habitats and stream ecological in incised river channel;
人工阶梯-深潭改善下切河流水生栖息地及生态的作用
The formation of entrenched valley is the mutual effect of tectonic movement and sea (lake) level.
下切谷的形成是构造运动和海(或湖)平面共同作用的结果。
Sedimentary facies of incised valley fillings of the Late Quaternaryin Hangzhou Bay area and shallow biogenic gas exploration;
杭洲湾地区晚第四纪下切河谷充填物沉积相与浅层生物气勘探
The Yan an Formation experienced the evolvement from incised valley filling,delta plain to meandering river,and is a whole transgression and regression cycle.
通过钻井资料、岩心资料、测井曲线、薄片鉴定等分析手段,认为鄂尔多斯西南缘延安组经历了下切河谷充填-三角洲平原-河流沉积的演化,为一个完整的湖侵-湖退旋回。
This paper presents the sedimentary fades and architecture of the Qiantangjiang and Taihu incised valleys, and the characteristics of shallow gas reservoir distribution, based on the analysis of a large number of drillings, static sounding and chemical data obtained from the present Hangzhou Bay coastal plain.
本文根据杭州湾沿海平原大量的钻井、静力触探井和分析化验等资料,研究了下切河谷(钱塘江和太湖下切河谷)充填物沉积相和沉积建造,以及浅层生物气藏分布特征。
The existence of incised valley of shahejie formation (tertiary) in liaohe basin;
辽河盆地沙河街组下切谷的存在及其充填模式
The logging constrained seismic conversion method was applied to fine interpretation and reservoir prediction of an incised valley in the Biyang Depression, on the basis of sequence stratigraghy.
以泌阳凹陷为例 ,在层序地层学研究的基础上 ,应用测井约束反演方法进行了下切谷精细解释和储层预测。
According to sequence stratigraphic study,two sets of incised valley can be identified from Hetaoyuan Formation in the Southeast of Biyang Depression.
通过对泌阳凹陷下第三系核桃园组层序地层学研究 ,于核三段二、四砂组发现两套下切谷沉积。
Through sequence stratigraphic research,four sequences in third grade were identified in the Hetaoyuan Formation of Lower Tertiary in Sungang area,north slop of Biyang Depression,among which a eroded valley topogenetic lowstand sedimentary system was recognized in the lowstand tracts of sequence Ⅱand Ⅲ.
泌阳凹陷北坡下切谷—低位扇沉积体系及其油气勘探意义 。
Method: Among 58 teeth with remnant lower incisor, 28 teeth were restored with light-cure post and core and 30 teeth were restored with metal post and core and then all cases were restored with porcelain fused metal crown.
目的 :比较光固化树脂核及金属桩核在下切牙残冠修复中的远期疗效。
Video-assisted subcutaneous mastectomy and immediate reconstruction with prothesis;
腔镜辅助乳房皮下切除假体植入一期乳房重建21例