Cause analysis and Complete Solving on Galling of API
Tubing and Casing for Tarim Oil Feild
Luo Faqian1 Lv Shuanlu1,2 Zhou Jie1 Qin Hongde1 Gong Jianwen1 Le Faguo1 Chi Jun1
Xie Youxin1 Nie Caijun1
1 Tarim Oil Field, Korla Xinjiang, 841000
2 China Petroleum University, Changping Beijing, 102249
Abstract:This paper gives a complete investigation,make up testsand running tests for some tubings and casings.It is considered that tubing and casing galling is not only related to product quality, but also abnormal operation.In order to guarantee bought tubing and casing quality,the complementarity specification on make up and break out test for tubing and casing specimens taken from the productis established,some tubing and casing galling problems being found,and being successessful on claiming for compensitio in accordance with the complementarity above.Abnormal operation factors resulting in galling include injury striked,stab decliningly,not guidescrew to correct position,make up at high speed,improper make up control methods,and etc.In order to solve tubing and casing galling problem caused by improper operation,new strap wrench and new thread protect easily installed and taken out are developed and patented,andthe specification on care and use of tubing and casingis established.The application on 2 patented products will not only protect effectively tubing and casing from galling caused by abnormal guide screw and injury striked,but also lighten woker labor strength,and improve the speed for tubing and casing running.The trying out results of the specification on care and use of tubing and casingin 3 well operation are very ideal.