A drill pipe structure with a high station structure and its manufacturing method

Abstract

The invention relates to a drill rod structure with a high-station structure, and a manufacturing method. The drill rod structure comprises a drill rod pipe body, a male joint and a female joint; the female joint and the high-station structure are integrally processed, the high-station structure consists of a cylinder in the middle and transition cones at two sides, the taper of the two cones are respectively 18 degrees and 35 degrees; the ratio of the outer diameter of the cylinder in the middle of the high-station structure to the outer diameter of each drill rod joint is 85-95%. According to the drill rod structure, by changing the structure of a standard drill rod, the station, using a hydraulic power tong, of a drilling worker is ascended to the height adaptive to a human body when the drill rod is used for performing fastening and unfastening rotation-connecting operations at a well head, and the fastening and unfastening operation efficiency can be enhanced by improving the operation comfortableness; in addition, the meshing damage of an old type cone chuck to a pipe body in meshing and clamping can be eliminated by matching a pneumatic type cone-free slips for use.

Description

technical field [0001] The invention relates to a drill rod, in particular to a drill rod structure with a high station structure and a manufacturing method. Background technique [0002] Drill pipe is an essential tool for oil and gas drilling. The drill pipe is structurally divided into three parts: the drill pipe body, the male joint, and the female joint. The male and female joints are welded and connected to form a whole drill pipe. The drill pipes are screwed through the male and female joints to form a drill string. It mainly plays the role of torque transmission and drilling fluid circulation. The API series standards of the American Petroleum Institute are widely used in the world, so it is also called API drill pipe or standard drill pipe. The drill pipes currently manufactured and used at home and abroad (except for heavy drill pipes that play a transitional role and kelly pipes that apply torque) all adopt this structure. The actual drilling operation shows th...

AI Technical Summary

Problems solved by technology

Make-up and break-out of standard drill pipe generally requires drilling workers to confirm the make-up and operate hydraulic tongs. Because the distance between the clamping part of the standard drill pipe joint hydraulic tongs and the well platform is short, the make-up and break-out station is relatively low, and workers When making and unloading buckles, you have to bend over to work, and it is difficult to stretch the waist, resulting in high labor intensity for workers, reduced work efficiency, and easy to cause occupational diseases of low back pain

In addition, for the wellhead drill pipe sitting on the chuck when the drill pipe is screwed, the pipe body under the female joint will be clamped by the cone, often at the clamping part (it happens to be the place where the thickened transition zone of the drill pipe disappears, that is, The stress concentration part) causes biting damage, the wall thickness of the biting damage point is reduced, corrosion is prone to occur, and corrosion cracks are initiated. Under the action of stress, the crack expands to form a puncture leak, resulting in the failure of the drill pipe

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