电子式定向仪由井下仪器及地面处理设备组成。
Electronic directional drilling system consists of downhole tool and sur - face data processing equipment.
同时对井下仪器在超深井中工作的可靠性给予评价。
Moreover, the reliability of downhole tool in ultra deep well is appraised.
利用套管柱上的已知的基准点来确认或对比处理深度所用的井下仪器。
A downhole tool used to confirm or correlate treatment depth using known reference points on the casing string.
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