石油化工腐蚀与防护
石油化工腐蝕與防護
석유화공부식여방호
PETROCHEMICAL CORROSION AND PROTECTION
2012年
1期
18-19
,共2页
马进文%金文刚%李昌胜%周戈亮%刘欣欣
馬進文%金文剛%李昌勝%週戈亮%劉訢訢
마진문%금문강%리창성%주과량%류흔흔
电潜泵井%防腐工艺%牺牲阳极%防腐装置
電潛泵井%防腐工藝%犧牲暘極%防腐裝置
전잠빙정%방부공예%희생양겁%방부장치
ESP well%anti - corrosion process%sacrificing anode%corrosion prevention unit
中国石油化工股份有限公司中原油田分公司文留油区电潜泵井腐蚀较为严重,腐蚀程度达到IV级以上的电泵井占统计总数的22.9%。电泵机组使用缓蚀剂,因不能预膜处理,总体上虽有一定效果,但易腐蚀部位防腐效果较差。在电泵机组应用牺牲阳极保护装置之后能使电泵机组和油管不再被腐蚀,只有当防腐器上的较活泼金属消耗完后,电泵机组和油管才会发生电化学腐蚀。缓蚀剂对电泵机组和油管的防腐具有均衡性,牺牲阳极保护技术对油管的防腐具有重点性,将二者结合使用,可取得较好效果。牺牲阳极防腐装置工艺简单,安装方便,缓蚀率高,对地层无伤害,能有效减少井液对电泵机组和油管管柱的电化学腐蚀,降低腐蚀速率,延长电泵机组和管柱的使用寿命。
中國石油化工股份有限公司中原油田分公司文留油區電潛泵井腐蝕較為嚴重,腐蝕程度達到IV級以上的電泵井佔統計總數的22.9%。電泵機組使用緩蝕劑,因不能預膜處理,總體上雖有一定效果,但易腐蝕部位防腐效果較差。在電泵機組應用犧牲暘極保護裝置之後能使電泵機組和油管不再被腐蝕,隻有噹防腐器上的較活潑金屬消耗完後,電泵機組和油管纔會髮生電化學腐蝕。緩蝕劑對電泵機組和油管的防腐具有均衡性,犧牲暘極保護技術對油管的防腐具有重點性,將二者結閤使用,可取得較好效果。犧牲暘極防腐裝置工藝簡單,安裝方便,緩蝕率高,對地層無傷害,能有效減少井液對電泵機組和油管管柱的電化學腐蝕,降低腐蝕速率,延長電泵機組和管柱的使用壽命。
중국석유화공고빈유한공사중원유전분공사문류유구전잠빙정부식교위엄중,부식정도체도IV급이상적전빙정점통계총수적22.9%。전빙궤조사용완식제,인불능예막처리,총체상수유일정효과,단역부식부위방부효과교차。재전빙궤조응용희생양겁보호장치지후능사전빙궤조화유관불재피부식,지유당방부기상적교활발금속소모완후,전빙궤조화유관재회발생전화학부식。완식제대전빙궤조화유관적방부구유균형성,희생양겁보호기술대유관적방부구유중점성,장이자결합사용,가취득교호효과。희생양겁방부장치공예간단,안장방편,완식솔고,대지층무상해,능유효감소정액대전빙궤조화유관관주적전화학부식,강저부식속솔,연장전빙궤조화관주적사용수명。
The ESP wells in Wenliu Oil Area of SINOPEC Zhongyuan Oil Field Company corroded seriously, and the number of ESP wells with corrosion of Grade IV and plus accounted to 22.9% of the total. When corrosion inhibitor was used for electric pump train, the corrosion prevention result was poor in corrosive locations because of being incapable of performing pre - filming treatment. When sacrificing anode cathodic protection unit was installed for the electric pump train, the electric pump train and oil pipe were no longer corroded. The electric - chemical corrosion only occurred when the active metals were consumed. Good corrosion prevention can be achieved by integrated application of corrosion inhibitor and cathodic protection because the corrosion inhibitor provides a balanced corrosion protection for electric pump train and sacrificing anode cathodic protection offers a concentrated corrosion protection for oil pipes. The sacrificing anode cathodic protection unit, which is simple in process, easy in installation, high in corrosion prevention performance and little in harm to the soil, can effective reduce the electric - chemical corrosion of well liquid on electric pump train and oil pipes and extend their service life.