找出了大斜度井中抽油杆断裂和脱扣的原因，并提出了预防措施。
Reasons of breakdown and thread-off of rod in high-inclination well are find out, and preventive measures are proposed.
一种螺杆泵抽油杆防脱扣接头主要解决现有螺杆泵抽油杆接头易脱扣问题。
A pumping rod housing lock joint of a screw pump is primarily used to resolve the problem that the current screw pumping rod joint is easy to release.
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