According to the data obtained in Zhongyuan Oil Field, ordinary casing can't bear such extremely high non-uniform in-situ stress, so special casing must be developed to the production of oil and water wells which are situated in gypsum-salt rock.
根据中原油田的地应力资料,普通套管无法承受异常高的非均匀地应力,因此,必须开发特种套管以专用于岩膏层的油水井生产。
参考来源 - 非均匀地应力下的套管损坏机理及修复工具分析·2,447,543篇论文数据，部分数据来源于NoteExpress
To solve this problem, a special casing - TP130TT high collapsing strength heavy casing has been developed.
针对这一问题，开发了一种特殊套管——TP130 TT高抗挤厚壁套管。
Because the limit of special casing program of sidetracking well and horizontal well, the fishing success ratio of conventional little junk fisher is low.
由于侧钻井、水平井特殊井身结构限制，常规的小件落物打捞器打捞成功率低。
But in case it has to evacuate the area around the damaged well, which lies some 50 miles off the Louisiana coast, BP also placed a special plug inside the well's casing.
但是为了预防，必须从离路易斯安那海岸大约50英里的毁坏的油井附近区域撤离，BP也在油井盒里放置了一个特殊的塞子。
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