摘要
为了解决分注井套管保护封隔器有效期短、套管长时间承压及腐蚀等问题,研发了双密封套管保护封隔器。该封隔器增加了承压胶筒、扶正装置和复位弹簧,有效阻隔了注水压力波动对密封胶筒的破坏,并降低了管柱蠕动。双密封套管保护封隔器在现场实施5口井,最大井深2 371 m,最大井斜30.57°,注水压力17.5 MPa,持续跟踪现场测试24个月,有效密封率达100%,并继续有效。现场应用结果表明:双密封套管保护封隔器可大幅提升密封性能,延长分注管柱的使用寿命。
In order to address the issues like short life-span , long-time pressure-bearing and corrosion ol packer with casing protection lor separate layer water injection well, the dual-seal packer with casing protection has been developed. The packer adds the pressure bearing rubber sleeve, centralizing device and reset spr ing, which could effectively eliminate the damage on the seal rubber sleeve by the water pressure fluctuations and reduce the string creep. The dual-seal packer with casing protection has been applied in five wells in the Block Jiyuan in Changqing Oilfield with the maximum well depth of 2 371 m , the maximum well inclination of 30. 57., and the water injection pressure of 17. 5 MPa. Continuous field test of 24 months showed that the effective sealing rate is 100% and continue to be valid. The application results show that the packer could greatly improve the sealing per-formance and prolong the service life of the separate layer water injection string.
出处
《石油机械》
2017年第2期93-95,共3页
China Petroleum Machinery
关键词
套管保护
封隔器
双密封
分层注水
注水压力
管柱蠕动
casing protection
packer
dual seal
separate layer water injection
water injection pressure
string creep
