Instead of using composite and chemical synthesis technology, we import birch and beech from overseas and adopt Tenon plug structure to avoid or reduce the use of cementing compound.

我们取材进口天然桦木榉木原木，不使用科技复合技术木板及化工合成塑料板材，木架使用打榫插接构造，尽量减少或不使用胶粘剂。

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While Halliburton had finished cementing the casing area outside the pipe, it had not yet been able to set a cement plug to block the pipe before the explosion.

尽管哈里·伯顿公司已经结束了管道外部套管区域的水泥浇铸，却未能在爆炸发生前设置一个水泥封井装置把管道封起来。

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The configuration and principle of anti rotary plug and necessary float collars and their applications in intermediate casing cementing are introduced.

介绍了防转胶塞及配套浮箍的结构、原理和在技术套管固井中的应用情况。

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