Processing technology of seamless drill pipe

A processing technology, seamless drill pipe technology, applied in the direction of drill pipe, drill pipe, casing, etc., can solve the problems of low service life, difference in mechanical properties of seamless drill pipe, high scrap rate of seamless drill pipe, etc., to improve Effect of service life and reduction of scrap rate

Inactive Publication Date: 2020-08-25
NANTONG HONGYUAN GEOLOGICAL ENG MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: but after the existing seamless drill pipes are manufactured, due to the different environments used, there are differences in their hardness requirements. However, under the current manufacturing process of seamless drill pipes, each It is difficult to adjust the conditions of the seamless drill pipes produced in batches to be consistent in all aspects, resulting in differences in the final mechanical properties of the seamless drill pipes; resulting in a high scrap rate and a low service life of some batches of seamless drill pipes , so it needs to be improved

Method used

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  • Processing technology of seamless drill pipe
  • Processing technology of seamless drill pipe
  • Processing technology of seamless drill pipe

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Experimental program
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Effect test

Embodiment 1

[0039] refer to figure 1 , is a kind of processing technology of seamless drill pipe disclosed by the present invention, comprises the following steps:

[0040] S1. Raw materials: put pig iron into the furnace for the first refining, add alloy components and refining agents for the second refining after the first refining, and continuously cast round billets, and perform annealing treatment on the round billets to obtain billets; The alloy composition is Si, Sn, Bi, In and Nb;

[0041] After the blank is produced, flaw detection is performed on the blank, preferably a physical flaw detection method, and mark removal treatment is performed on damaged parts.

[0042] S2, perforation: heating the billet, the heating temperature is controlled at 1150°C, after the billet is heated, it is perforated to obtain a tube blank;

[0043] The eccentricity of the tube blank obtained after the blank is pierced is tested. If the eccentricity of the tube blank is less than 5%, it is qualifie...

Embodiment 2

[0057] The difference between this embodiment and Embodiment 1 is that in step S7, only one reinforcing layer is coated on the finished seamless drill pipe.

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Abstract

The invention relates to a processing technology of a seamless drill pipe, and relates to the technical field of seamless pipes. The technical problem is that the final revealed mechanical propertiesof the seamless drill pipes are different, resulting in relatively high scrap rate and relatively low service life of some batches of seamless drill pipes. The processing technology includes the following steps of: (S1), raw materials: putting pig iron into a furnace and adding alloy components and refining agents for refining to obtain billets; (S2), perforation: carrying out perforation treatment after heating the billets to obtain tube blanks; (S3), cold rolling: carrying out cold-rolling treatment on the tube blanks; (S4), cutting: carrying out fixed-length cutting on semi-finished drill pipes; (S5), chamfering: chamfering the semi-finished drill pipes; (S6), surface treatment: carrying out basic surface treatment on the drill pipes; (S7), strengthening layer: coating the surface of each finished seamless drill pipe with a strengthening layer; and (S8), packaging: carrying out batch packaging on the produced seamless drill pipes. The invention has the effects of increasing the service life of seamless drill pipes and reducing the scrap rate during use. The processing technology provided by the invention has the effects of prolonging the service life of the seamless drill pipe and reducing the scrap rate during use.

Description

technical field [0001] The invention relates to the technical field of seamless pipes, in particular to a processing technology for seamless drill pipes. Background technique [0002] At present, as the technology of earth drilling exploration becomes more and more mature, the use of seamless drill pipe as an important part of geological exploration equipment is also increasing day by day. [0003] The existing authorized notification number is CN208168814U patent, which provides a seamless geological drilling pipe, including a hollow rod body, external threads are arranged on the outside of the rod body, a U-shaped water pipe is arranged in the middle of the rod body, and the inside of the rod body is symmetrical There are chutes that fit and slide on both sides of the water supply pipe respectively; with the cooperation of the water pipe and the chute, the heat dissipation efficiency of the drill pipe is improved, and the deformation of the drill pipe in a high temperature...

Claims

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Application Information

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IPC IPC(8): B23P15/00E21B17/00
CPCB23P15/00E21B17/00
Inventor 刘炳城俞吉晶
Owner NANTONG HONGYUAN GEOLOGICAL ENG MATERIAL
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