| 摘要 |
PURPOSE: A guide member for perforation and a punching method using the same are provided to facilitate the perforation of a sand and rock layer or a base rock. CONSTITUTION: A guide member for perforation comprises a guide pipe(110) and a support. The guide pipe is inserted within a casing(150) for perforation. The guide pipe is comprised of an H beam and a connection part. The support is inserted into the casing to contact the edge of the H beam.
|
