A rolling method for controlling the inner diameter of a seamless steel pipe perforating gun barrel

Abstract

The invention discloses a seamless steel pipe perforating gun barrel inner diameter controlled rolling method. The method comprises the following sequential steps of annular furnace heating, hole penetrating, hollow blank reducing, continuous rolling, reheating, tension reducing, clamping plate full bore, cooling bed cooling, segmented warehousing and the like of a pipe blank, a special inner diameter control method is added, and a special inner diameter clamping plate is designed in the rolling production process and in the checking process for meeting inspection requirements after the rolling process, so that the rolling problem and the inspection problem of high precision and high inner diameter requirements of perforating guns in batch can be solved, and the inner diameter requirementof a user is met in a hundred percent mode.

Description

technical field [0001] The invention relates to the rolling technology of the perforating gun barrel, more specifically, relates to a rolling method for controlling the inner diameter of the seamless steel tube perforating gun barrel. Background technique [0002] The perforating barrel is a high-profit product of a steel company, and has a good reputation in domestic and foreign markets. Since 2017, as the domestic market in the United States has stepped up oil and gas exploration, the demand for perforating barrels has gradually increased. In order to lower manufacturing costs, the United States has come to China to purchase a large number of perforating barrels. At the same time, the 140 seamless steel pipe is gradually transformed, and the development of mechanical pipes has been intensified to further expand the market for perforating gun barrels. However, the technical requirements of the United States for perforating barrels are much stricter than domestic ones, suc...

AI Technical Summary

Problems solved by technology

Through the tracking of the production process, it is found that the wall thickness of the current perforating guns varies widely (above 1mm), and the actual outer diameter is 0.2-0.3mm larger than the average outer diameter, resulting in the inner diameter of the perforating gun barrel after production is often too large or too small, The pass rate of the inner diameter is between 0 and 50%, and the pass rate is low

Further analysis of the process method problem is mainly due to the following deficiencies in the existing perforating barrel rolling process method: 1) The conventional process perforation, continuous rolling, and tension reduction process parameters have a wide range and a fast pace, resulting in poor wall thickness accuracy and The outer diameter control can only meet the API requirements of conventional products, but cannot meet the special inner diameter requirements of the exit perforating barrel

2) There is a lack of inspection methods for special inner diameter requirements, no special inner diameter detection tools, and the manual use of inner diameter rulers is slow and inaccurate in measurement, which cannot meet the mass production needs of perforating barrels with special inner diameter requirements

3) If the existing diameter rod is used for inspection during the packaging and production of the pipe body, only the passing rate of the inner diameter can be inspected, and the minimum value of the inner diameter cannot be met. The biggest problem is that it seriously affects the production rhythm and cannot be produced normally.

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