查询词典 drill bit

The geologist needs toknow what rocks the drill has reached, so every so often a sampleis obtained with a coring bit.

地质学家需要知道钻头已以到达什么样的岩层，因此时常要用芯钻头取样。

The geologist needs to know that rocks the drill has reached, so every so often a sample is obtained with a coring bit

地质学家需要知道钻头已经到达什么样的岩层，因此时常要用取芯钻头取样。

Geologist so every so often The geologist needs to know what rocks the drill has reached, so every so often a sample is obtained with a coring bit.

地质学家需要知道钻头已经到达什么样的岩层，因此时常要用取芯钻头取样。

And we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

A mixture of clays and water; pumped down the drill pipe to lubricate and cool the drilling bit.

泥土和水的混合物，顺钻杆而下，起润滑和冷却钻头的作用。

This depression automatically centered the bit in the drill press.

抑郁症会自动为中心，这在钻床位。

I used a mini drill press and bit for the pilot holes and then a table top scroll saw to cut out the windows.

我用一个小型钻床和钻头的试验洞，然后一张桌子顶端滚动看到削减了窗户。

Arrow type check valve used to be installed between drill stem and bit to prevent drilling fluid backflow from the bottom.

箭形止回阀用以安装在钻杆和钻头之间防止钻井液从井底回流。

Based on the drilling operation of 4 Wells, this article describes the basic characteristic of coalbed methane and technical difficulties in drilling. Some technical keys as borehole quality, fresh Water drilling,fresh water coring, coal-bed methane protection are solved through application of a series of techno1ogical measures such as optimization of rock bit, optimization of drill stem, optimization of drilling parameters and string coring and etc. The experimental performance, especially in fine-grained ...

本文以四口井的施工为例，着重介绍了煤层气井的特点，并指出了钻煤层气井的几个技术难点，通过钻头优选，钻具优选，钻井参数优选，绳索式取心技术等的现场实施和应用，基本解决了井身质量，清水钻井，清水绳索取心，煤层气保护等几个方面的技术难题，文中还介绍了使用中原油田自行设计的中原9508绳索取心工具的取心情况，尤其是在粉煤层地区的取心情况，这将为今后的煤层气开发打下坚实的基础。

Power drill tool and PDC bit are used to ensure wellbore quality and penetration rate; polysulfonate potassium drilling fluid system is used to ensure downhole safety.

应用动力钻具配合高效PDC钻头钻井技术，保证了井身质量和钻井速度；应用聚磺钾盐钻井液体系及相关安全技术措施，保证了井下安全。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。