岩心卡簧，要求质量高。不但要有较高的强度和硬度，还要有良好的弹性，否则要影响钻进效率和取心质量。我队修配间老工人经过反复试验，利用废钻杆，在普通机床加工出了合乎要求的岩心卡簧。到今年为止共加工了4500多个，满足了本队需要，支援了兄弟 Core retainer, high quality requirements. Not only have higher strength and hardness, but also have good flexibility, otherwise it will affect the drilling efficiency and coring quality. Our team repair old workers after repeated testing, the use of waste drill pipe, in the normal machining of the core of a qualified card retainer. By the end of this year, more than 4,500 have been processed to meet the needs of the team and support the brothers