Mainly for geological prospecting in complex formation drill collars manufacturers drilling practical problem. To achieve technological breakthroughs hole expansion pipe, prospector team technical staff after dozens of simulations and field tests, just more than a year we have obtained a lot of new progress, especially in Lujiang - Zongyang National assembled exploration area iron copper water exploration drilling rig encountered swelling, weakness, loose ground test, only half a day to complete the formation of the control section, so that the original drilling process pump pressure drops to normal levels from exceeding 60%. Currently, the project research results, geological core drilling with hydraulic alarm hydraulic tube expander,AISI 4145H Hole Opener  hydraulic alarm tandem drilling reamer and hydraulic anti-de-expander tube into devices, has received three national patents.