Tool joint device

Abstract

The invention discloses a drill rod joint device which comprises an outer threaded joint and an inner threaded joint in threaded fit with the outer threaded joint. Conical table shoulders are arranged on the outer side of the end, away from an outer threaded segment, of the outer threaded joint and the outer side of the end, away from an inner threaded segment, of the inner threaded joint respectively. A plurality of radial ribs arranged radially are arranged on the conical table shoulders at intervals, and flow passing grooves are formed between the adjacent radial ribs. According to the drill rod joint device, due to the fact that the radial ribs arranged radially and the flow passing grooves are arranged on the conical table shoulders at intervals, the erosion and abrasion resisting capacity of a drill rod joint is high, a drill rod can be prevented from being abraded or damaged too early, therefore, the service life of the drill rod is prolonged, well drilling efficiency is improved, the well drilling period is shortened, and well drilling cost is lowered.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration equipment, in particular to a drill pipe joint device for connecting drill pipes. 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] During the drilling process, the drill pipe is located in the wellbore, and the drilling fluid carrying a large amount of cuttings particles returns to the surface through the annular space between the drill pipe and the wellbore. When the drilling fluid passes through the drill pipe joint, due to the transition shoulder between the drill pipe body and the joint, under the action of inertia, the cuttings particles collide with ...

AI Technical Summary

Problems solved by technology

Local erosion and wear will lead to piercing and leakage of the drill pipe joint, resulting in the connection of the inner and outer flow channels of the drill pipe, and the high-pressure drilling fluid in the drill pipe entering the annular space, causing pressure loss and reducing the working performance of the drilling fluid. When the wear is serious, The strength of the drill pipe joint is reduced, resulting in the breakage of the drill pipe, resulting in drilling accidents, reduced drilling efficiency, and increased drilling costs

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