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Benefiting Mining Technology-Rib Drill Pipe Joint Structure Type
Release time:
2019-06-21
Author:
Source:
Shandong yi mining drilling technology co., ltd. production of drilling engineering dedicated to all kinds of geological drill pipe, spiral drill pipe, triangular drill pipe, coal drill pipe, drill bit, drill pipe, complete specifications! Strength manufacturers, trustworthy! company set research and development-production-sales-sales as one, welcome customers to purchase, tel: 0635-2311078
1. Stress dispersion groove of rib drill pipe: Experimental research shows that fatigue fracture of trenchless guided and directional drill pipe under cyclic bending stress is the main failure form of drill pipe, and this failure mainly occurs at the root of the male joint of drill pipe or the root of the thread of the male joint. The design of the stress dispersion groove at the root of the drill pipe male joint can effectively reduce the stress concentration there, thereby improving its bending resistance. In addition, as far as possible to increase the thread diameter, taper thread design and increase the thread wire bottom arc radius can also significantly improve the drill pipe male joint root bending capacity.
2. Rib drill rod "double top" structure: the so-called "double top" structure, that is, when the drill rod male and female buckles are tightened, the end of the female buckle is tightly pressed with the shoulder of the male buckle, and the inner shoulder of the female buckle is also tightly pressed with the end of the male buckle. "Double top" structure of the drill pipe is difficult to process, but it has many advantages compared with the "single top" drill pipe: good sealing effect drilling fluid leakage from the inside to the outside through the two sealing surface, leakage resistance.
Rib drill pipe can withstand greater torqueThe "double-top" drill pipe provides two anti-torsion shoulders, and its total contact area is much larger than that of ordinary drill pipes, so the torque it bears is much larger than that of ordinary drill pipes.
Improve the service life of the drill pipe Ordinary drill pipe is often due to joint wear, the end of the female buckle is thin and the male buckle cone into a bell mouth, so that the whole drill pipe failure.The inner shoulder of the "double-top" drill pipe still works effectively after the joint is severely worn, and the drill pipe can continue to be used.
shandong yi mining drilling technology co., ltd. production of drilling engineering dedicated to all kinds of geological drill pipe, spiral drill pipe, triangular drill pipe, coal drill pipe, drill bit, drill pipe, complete specifications! Strength manufacturers, trustworthy! company set research and development-production-sales-sales as one, welcome customers to purchase, tel: 0635-2311078
Key words:
Drill pipe, geological drill pipe, spiral drill pipe, geology, spiral, new coal drill pipe
