It is a little exaggerated, but not totally wrong

送交者: lcdos 于 2011-04-08, 07:08:28:

回答: 笑死人，这是从哪听说的（务请荒川进来看，这个人的不靠谱）由三脚猫于 2011-04-08, 00:53:49:

Oil well is fit with steel pipe (casing) after drilling to prevent the hole from collapsing. Then you need some kind of directional charge (like bullet) to make holes on the steel pipe and the formation to let oil and gas in.

http://www.usoilandgas.net/images/perforating_image.jpg

it is not 外面 though

所有跟贴:

你说的是射孔，和压裂是两码事。 (无内容) - 三脚猫 (0 bytes) 2011-04-08, 08:38:55 (574064)
- I have never heard of using dynamite to do fracture - lcdos (118 bytes) 2011-04-08, 09:19:50 (574076)

加跟贴