Ocean drill rod connector

Abstract

The invention discloses an ocean drill rod connector. The ocean drill rod connector comprises a male connector body and a female connector body. The male connector body and the female connector body are provided with an outer thread and an inner thread which are matched with each other respectively. Both the end, away from the outer thread end of the male connector body, of the male connector body and the end, away from the inner thread end of the female connector body, of the female connector body are provided with tapered circular beads. The tapered circular beads are provided with a plurality of reinforcing ribs of a spiral structure at intervals. Spiral grooves are formed between the adjacent reinforcing ribs. According to the ocean drill rod connector, the reinforcing ribs of the spiral structure and the spiral grooves are arranged on the tapered circular beads at intervals, so that the ocean drill rod connector is high in torsional strength, large in load capacity, evenly distributed in stress and capable of meeting the high torsional requirement of ultra deep drilling of an ocean drill rod; the reinforcing ribs and the spiral grooves further have the advantages that the drilling fluid circulation is accelerated, and the corrosion wear resistance is improved, the ocean drill rod can be prevented from being worn untimely and failed, the service life of the drill rod is prolonged accordingly, the drilling efficiency is improved, the drilling cycle is shortened, and the drilling cost is lowered.

Description

technical field [0001] The invention relates to the technical field of offshore oil and gas exploration equipment, in particular to an offshore drill pipe joint. Background technique [0002] Drill pipe is an important tool for drilling work, and it is an important part of the drill string. During the drilling process, the drill pipe plays an important role, such as transporting drilling fluid to the bottom of the well, transmitting torque to the drill bit, tripping the drill bit, dealing with downhole accidents, testing, etc. [0003] In the process of offshore drilling, different drilling fluids form different dispersion systems and play different roles. From a physical and chemical point of view, drilling fluid is a multiphase unstable system. In order to meet the requirements of the drilling process and improve the performance of the drilling fluid, various additives are often added to the drilling fluid. During the circulation process, the drilling fluid cannot alway...

AI Technical Summary

Problems solved by technology

Therefore, it is easy to deposit debris, increase the pressure of the offshore drill pipe, accelerate the wear of the offshore drill pipe, and cause the breakage of the offshore drill pipe in severe cases, resulting in drilling accidents, reduced drilling efficiency, and increased drilling costs.

[0007] The solid phases such as cuttings carried in the drilling fluid are easy to block the oil and gas channels. When the drilling fluid pressure is higher than the formation pressure, the drilling fluid penetrates into the formation, and the solid phases such as cuttings, which are smaller than the oil and gas passages in the formation, will go deeper, forming blockages and leaking formations. It makes the drill bit easy to pack mud, pull out the piston, induce blowout, and cause pressure surge when running down the drill, causing well leakage and eventually polluting the oil layer

And a large amount of debris deposition will reduce the ROP

[0008] If the solid phase such as cuttings in the drilling fluid cannot be effectively removed, the mud cake will become loose and thick, resulting in large water loss and easy wall collapse; the hole becomes smaller and the pipe is easy to stick; causing pressure differential sticking

A large number of solid phase deposits such as cuttings will increase the friction coefficient and torque, which will increase power consumption, and easily cause drill tool accidents and reduce the life of the drill tool

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