mkFit is an implementation of the Kalman filter-based track reconstruction algorithm that exploits both threadand data-level parallelism.In the past few years the project transitioned from the R&D phase to deployment Grilles in the Run-3 offline workflow of the CMS experiment.The CMS tracking performs a series of iterations, targeting reconstructio

Through a comprehensive review of the development status of workover technology of PetroChina Company Limited (PetroChina), this paper presents the connotation of workover operation under the background of the new era, the latest progress of workover operation in the respects of equipment, tools, technology and the construction of information and s