The landing collar comprises housing, ball seat and latch.
由外壳、锁紧座和球座等组成。
The latch is configured to retain the well logging instrument and carrier in a second position such that at least a portion of the well logging instrument extends outwardly from the housing.
所述锁定装置配置用于将测井仪器和载体保持在第二位置上，以使得测井仪器的至少一部分从所述外壳向外伸出。
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