Abstract: There were the practical problems that mud and fluid discharged hardly, and it was difficult to guarantee the quality of hole sealing with drilling construction when downward pressure-measuring hole existed. On the basis of tradition method, an improvement scheme was put forward that increasing the drilling depth, fluid discharge by gas-lift method, double poly leakproof plug of twice timeshare hole sealing-cement mortar timeshare sealing technique. Then the scheme was applied in site and had achieved good effects.