As the development of oilfield goes on the well conditions are getting worse and worse. Especially some old wells, due to various causes, are plagued with perforations in the free sections of casing and the cemented sections, causing oozing out of mud and water from the stratum affecting the normal production of the oil-water well. Secondly, the method adopted for overhaul to take out and replace the casing is too costly, too difficult and too laborious & -not to say it is seldom successful. For deep wells the recovery rate is low. XP-I Polymerization Reinforcing Agent can overcome the above defects. By adopting up-to date microcrystalline compound material, it is tensile, highly resistant to high pressure and of durable effect. Small dosage, simple to use, adjustable cementing time, safe work it can increase water storage used for production and recovery rate reduce work load and well cost and raise economical result and social result. 1. Property Technical Indexes: The product and its use method are fit for various leakage stopping work à The stopping power is over 15Mpa à The initial cementing time can be adjusted as required à When the well is stopped requirements all kinds of means to be applied can be satisfied. à The stopping result lasts over one year 2. Quality Indexes Terms Standard indexes Appearance Black & grey powder Moisture % , d10 3. Use à All kinds of blast-holes; à All kinds of layer; à Casing leakage in cemented sections; à Casing leakage in free sections à Channeling. 4. Storage & Package 25Kg net sealed in 4-in-1 compound paper bag with plastic lining during storage and transport see that the bag is intact. and the rain is strictly prohibited.