1. In drilling exploration and well drilling Industry, the drilling pipe and drill collar are key apparatus.

2. In addition, the force on drilling pipe during the killing is also be analyzed.

3. Through the deep investigation and analysis of the drilling pipe failure,() the main factors causing drilling pipe failure are found out.

4. In order to improve on the properties of drilling pipe and its competitive price, a research on design and manufacturing high strength pipe is done based on a cooperation between DUT and Bao Steel.

5. In order to improve the shock toughness of friction welding joint of oil drilling pipe, spray quenching is used as the measure of heat treatment after friction welding.

6. With a great development of petroleum industry in our country, the requirement of drilling pipe is not only big quantity but also good quality.

7. Trace design is the key of trenchless horizontal directional drilling pipe laying engineering, the paper makes a deep research on the trace optimization design with dynamic programming theory.

8. This kind of tool can be connected between the drilling pipe to help the effective removing of the bed using its hydraulic and mechanical function.

9. Then, the adoption of appropriate countermeasures has effectively prevented the failure of drilling pipe, thus guaranteeing the reliability of drilling pipe quality.

10. The valve at the bottom of auger can prevent drilling bits entering hollow pipe during operation. When drilling pipe is taken out and concrete grout is injected, the valve will be opened.

11. An apparatus and method for a modified horizontal directional drilling assembly for drilling pipe into a drilling surface.

12. Our main products are steel wire weaving and wire spiral rubber hose, oil drilling pipe, oil and liquefied petroleum gas and special gas hose, sandblast pipe.

13. This year the US, EU and Argentina have started anti-dumping investigations into Chinese exports like oil drilling pipe and coated art paper.

14. In light of the commonly seen downhole breakdown of drilling pipe sticking in the drilling process, the new-type fully hydraulic while-drilling bumper sub was developed.

15. Despite early hopes that the oil spill could be minimized, the rig's fractured drilling pipe is currently leaking 42, 000 gal. of crude a day.