Production method of anti-sand sieve tube

Abstract

The invention relates to a production method of an anti-sand sieve tube. The method comprises the following steps: 1) preparing materials, and purchasing three raw materials, wherein the first material is a trapezoidal stainless steel wire which is used for producing a filter piece, the second material is a strip-shaped stainless steel plate which is used for producing a protecting cover, and thethird material is a base tube which is an oil / sleeve steel tube conforming to API (American petroleum institute) standards or Chinese national standards; 2) manufacturing a blank of the protecting cover; 3) manufacturing a finished product of the protecting cover; 4) manufacturing a finished product of a filtering component; 5) drilling hole slots on the base tube; 6) manufacturing the sieve tube; and 7) cleaning and polishing. The production method is high in degree of automation, time-saving, effort-saving, labor-saving, raw-material-saving, low in cost, high in production efficiency and high in yield.

Description

technical field [0001] The invention belongs to the technical field of petroleum production engineering, and relates to a sand control sand filter tool in oil and gas production wells, in particular to a sand control screen. Background technique [0002] Sand control screen is an oil well sand control tool, which is composed of a base pipe and a filter assembly embedded in the base pipe. The filter assembly is composed of a V-shaped filter and a protective cover. Its typical structure is disclosed in Chinese patent 200520007668.5 (a V-shaped precision micro-seam self-cleaning sand control screen), and its production method is disclosed in Chinese patent 200610073493.7 (processing technology with V-shaped groove sand control screen). It consists of four processes: base pipe processing, filter assembly processing, coupling processing, base pipe and filter assembly assembly, and there are two problems in its production process: [0003] The first is that the filter is made by ...

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Problems solved by technology

[0003] The first is that the filter is made by grinding. There are two grooves with slopes on the filter, and the double groove is ground with a special grinder. That is to say, in order to produce a V-shaped filter, it is necessary to use A group of equidistant, double grinding wheel special grinding machines with the same specification width are used to grind double grooves, so that two grooves with slopes are formed on both sides of the filter sheet. Since each filter assembly is composed of 3 to 30 filter sheets, Therefore, grinding double grooves for each filter sheet with a grinding machine is too low in production efficiency, labor-intensive, time-consuming, and material-intensive (grinding belongs to material-reduction processing)

[0004] The second is to manually press the overlapping filter sheets into the protective cover to assemble the filter assembly. This assembly method is not only inefficient, labor-intensive, time-consuming, and labor-intensive, but also greatly affected by human factors. The accuracy of the filter seam Not easy to control, prone to unqualified products, low yield

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