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A nickel-tungsten-based alloy coated screen used in oil and gas wells containing hydrogen sulfide, carbon dioxide and high salinity

A technology with carbon dioxide and high salinity, which is applied in wellbore/well components, mining fluid, earthwork drilling and mining, etc. It can solve problems that have not been reported in research and application, and achieve excellent anti-corrosion performance, high hardness, good anti-corrosion The effect of fastening performance

Active Publication Date: 2018-04-27
湖南常德纳菲尔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, the research and application of nickel-tungsten-based alloy-coated screens have not been reported in relevant literature

Method used

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  • A nickel-tungsten-based alloy coated screen used in oil and gas wells containing hydrogen sulfide, carbon dioxide and high salinity
  • A nickel-tungsten-based alloy coated screen used in oil and gas wells containing hydrogen sulfide, carbon dioxide and high salinity
  • A nickel-tungsten-based alloy coated screen used in oil and gas wells containing hydrogen sulfide, carbon dioxide and high salinity

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 , figure 2As shown, a tungsten alloy screen tube has a structure including a base pipe (a Ф127×9.19mm casing made of 110ss material, and the through holes on the surface are evenly arranged in a spiral shape) and a nickel-tungsten-based alloy coating.

[0042] Its preparation process is:

[0043] 110ss Ф127×9.19mm bushing is used as the base tube. After the base tube is threaded, surface treatment and activation are performed, and then the inner surface of the base tube and the thread are electroplated with nickel-tungsten alloy, taken out and cleaned. Finally, sieve holes are drilled on the base tube according to the designed shape and size. After the sieve holes are punched, nickel-tungsten alloy is electroplated on the outer surface of the base tube and in the sieve holes. After the electroplating is completed, it is cleaned, then heat-treated at 180-550°C, and the finished product is packaged.

[0044] The surface of the obtained product is smoo...

Embodiment 2

[0046] The base tube is a Ф127×9.19mm casing made of 110ss material, and the through holes on the surface are evenly arranged in a spiral shape, and the Ni-W-Co ternary alloy is electroplated.

[0047] Its preparation process is with embodiment 1.

[0048] The appearance of the obtained product is uniform and fine, and the composition of the alloy coating is Ni65%, W30%, Co5%, the thickness of the coating is 60-90μm, and the hardness is 920Hv. The samples were tested according to GB / T17897-1999 stainless steel iron trichloride pitting corrosion test method (6%FeCl3, 24h). After the test, see Figure 9 ,as the picture shows, Figure 9 Figure a in the figure shows the appearance of the tungsten alloy sample after the test, and it can be seen that there is no obvious corrosion on the surface of the sample; Figure 9 Figure b in the figure is the 200 times magnified topography of the surface of the tungsten alloy coating after the test. The surface of the coating is smooth and d...

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Abstract

The invention relates to a screen pipe used for sand control and filtration of oil and gas wells containing hydrogen sulfide, carbon dioxide and high salinity in oil and gas exploitation operations. The preparation method is to evenly coat a layer of nickel-tungsten-based alloy coating with high wear resistance, hydrogen sulfide, carbon dioxide and saturated salt water corrosion on the outer surface of ordinary sulfur-resistant screen pipes, including external threads at both ends and evenly distributed through holes. The nickel-tungsten-based alloy coating is Ni-W-X alloy coating or Ni-W-Y alloy coating or Ni-W-X-Y alloy coating, wherein X is Co and / or Fe, and Y is P and / or B . The screen has both the high strength of ordinary screens and the high anti-corrosion and high wear resistance of tungsten alloys. It can effectively replace stainless steel screens, high-chromium screens and nickel-based alloy screens, and is used for , In saturated brine oil and gas wells, it can greatly save the manufacturing cost of screen pipes. The invention also has the characteristics that the type of base pipe and the type of drilling can be freely selected by customers, has strong adaptability, and has wide application range.

Description

technical field [0001] The invention relates to a nickel-tungsten-based alloy coated screen pipe used for sand control and filtration in oil and gas wells containing hydrogen sulfide, carbon dioxide and high salinity, belonging to the field of petroleum machinery and equipment. Background technique [0002] Sand control is an indispensable link in the exploitation of sand producing oil and gas reservoirs. Mechanical sand control is the most commonly used sand control method for oil wells in today's oil fields. At present, about 80% of sand producing oil and gas wells in the world use this sand control method. Sand control screen is one of the core components of mechanical sand control technology. It has a great impact on sand control effect, cost and oil well production. At present, the development situation of oil and gas fields is becoming more and more serious, the wells are getting deeper and deeper, and the content of hydrogen sulfide and carbon dioxide is high. The re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/08
Inventor 何凤姣鞠辉张长科高晖
Owner 湖南常德纳菲尔新材料科技有限公司