2 sentences for 鑽 (zuān — to drill)

1. 那口井他们已经钻了一年多了。

   nà kǒu jǐng tā​men yǐ​jing zuān le yī nián duō le.

   They have been drilling that well for more than a year.

   Source: AI Challenger 2017

2. 钻孔什么时候停止的？

   zuān​kǒng shén​me​shí​hou tíng​zhǐ de?

   When did the drilling stop?

   Source: OpenSubtitles