一种孔内驱动式水平定向钻反循环扩孔钻头

Release time:2016-03-30

Affilication of Author(s):中国地质大学（武汉）

School Sign:中国地质大学（武汉）

Patent Applicant:马保松

Disigner of the Invention:马保松；韦立勇；曾聪；兰海涛；舒彪

Type of Patent:Invent

Authorization number:CN201010515227.1

Number of Inventors:5

Service Invention or Not:no

Authorization Date:2011-04-06

First Author:马保松