螺杆钻具是其中的一项关键技术，其主要目的是研制满足侧钻中短半径水平井需要的小尺寸高造斜率的弯外壳螺杆钻具。
Small size bent housing screw drill with high build rate must be developed to meet the requirements of sidetracking the short to medium radius horizontal well.
螺杆钻具是其中的一项关键技术，其主要目的是研制满足侧钻中短半径水平井需要的小尺寸高造斜率的弯外壳螺杆钻具。
Small size bent housing screw drill with high build rate must be developed to meet the requirements of sidetracking the short to medium radius horizontal well.
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