Thermoplastic composite polymer for well drilling pressure-bearing plugging

The invention relates to a thermoplastic composite polymer for well drilling pressure-bearing plugging. The problems that an existing bridging plugging material is prone to causing infirm plugging andrepeated leakage are mainly solved. The thermoplastic composite polymer is characterized in that the thermoplastic composite polymer comprises an A-type composite polymer, and the A-type composite polymer comprises ultrafine calcium carbonate, a plugging agent 801 while drilling, a non-permeable plugging agent, sulfonated asphalt and ultrafine rubber particles. The thermoplastic composite polymerfor well drilling pressure-bearing plugging can prevent well leakage, a plugging layer with high strength can be formed once leakage occurs, and the plugging effect is good. 本发明涉及一种钻井承压封堵用热塑性复合聚合物。主要解决了现有桥接封堵材料容易引起封堵不牢以及反复漏失的问题。其特征在于：包括A型复合聚合物，其组分分别为：A型复合聚合物包括超细碳酸钙、随钻堵漏剂801、非渗透封堵剂、磺化沥青和超细橡胶颗粒。该钻井承压封堵用热塑性复合聚合物，能够防止井漏发生，一旦发生漏失时能形成具有较高强度的封堵层，堵漏效果好。