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What are the characteristics of heavy drill pipes

release time：2026-06-03

source： Internet

The characteristics of weighted drill pipes are as follows:
1. Its drill pipe joints are longer than ordinary drill pipes, providing a larger wear-resistant surface and weight.
2. The weight of the weighted drill rod is heavier than that of drill rods of the same size.
3. The outer thick section in the middle serves as a small stabilizer, thereby increasing the bending resistance.
4. Welding wear-resistant hard alloy on the surface of the joint can extend its service life by 4 times.
5. Fatigue failure of drill string often occurs on several drill rods above the drill collar, because the cross-section changes sharply when transitioning from the drill collar to the drill rod, and bending stress is concentrated on this part of the drill rod.
6. After connecting the weighted drill pipe to the directional well drill string, the drill collar and the weighted drill pipe body can be prevented from tightly adhering to the wellbore, thereby reducing the possibility of sticking and sticking during drilling.

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What is the working condition of the drill string during the drilling process

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What is the working condition of the drill string during the drilling process

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