Large Diameter Fully Casing Impact Bucket Grab CGD-1 was designed and development mainly for mating the fully casing drill rig. The Grab is mainly suitable to be used in complex formations. The technical parameters, performance features, main structure and test results were introduced.
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冯起赠,宋志彬,王年友. CGD-1型大口径全套管冲击抓斗的设计和应用[J].钻探工程,2005,32(6):38-40.FENG Qi-zeng, SONG Zhi-bin, WANG Nian-you. Design and Application of Large Diameter Fully Casing Impact Bucket Grab CGD-1[J]. Drilling Engineering, 2005,32(6):38-40.