Research on Key Technologies of a New Type of Surface Cutting Device for Shallow Layer Well Servicing Operations
During the downhole process of an oil well,the casing tongs can damage the connecting thread of the casing.After a long time in the well,the casing is easily corroded,which makes it difficult to untie the casing during the replacement process,and the casing needs to be cut quickly.However,the limited space for wellhead operations restricts existing casing replacement methods due to their high cost,long cycle,tight power,and prohibition of open flames at the oilfield production site.To address this issue,this paper has proposed a wellhead cutting device for shallow casing replacement,which consists of four parts:centralizing mechanism,cutting mechanism,transmission mechanism,and cutting tool.The main parts were analyzed by software such as ANSYS,and the results show that the device has the advantages of small size,fast installation,safe and reliable cutting work,and high cutting efficiency.It enables quick cutting of casings,improves operational efficienc,and reduces costs.
cutting devicecutting speedoil casingstress distribution
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