Nickel-tungsten-based alloy coating screen pipe for high-salinity oil-gas well containing hydrogen sulfide and carbon dioxide

A technology with carbon dioxide and high salinity, which is applied in wellbore/well components, mining fluids, earthwork drilling and mining, etc. It can solve problems that have not been reported in research and application, and achieve excellent anti-corrosion performance, low material cost, easy loading and unloading easy effect

Active Publication Date: 2014-01-22
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-base

Method used

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  • Nickel-tungsten-based alloy coating screen pipe for high-salinity oil-gas well containing hydrogen sulfide and carbon dioxide
  • Nickel-tungsten-based alloy coating screen pipe for high-salinity oil-gas well containing hydrogen sulfide and carbon dioxide
  • Nickel-tungsten-based alloy coating screen pipe for high-salinity oil-gas well containing hydrogen sulfide and carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] like figure 1 , figure 2 As shown, a tungsten alloy screen tube, its structure includes a base tube (110ss material Ф127 × 9.19mm type casing, the surface through holes are evenly arranged in a spiral shape) and a nickel-tungsten-based alloy coating.

[0042] Its preparation process is:

[0043] The casing of Ф127×9.19mm made of 110ss material is used as the base pipe. After the thread is machined on the base pipe, surface treatment and activation are carried out, and then nickel-tungsten alloy is electroplated on the inner surface and the thread of the base pipe, taken out and cleaned. Then, sieve holes are punched on the base pipe 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 pipe and in the sieve holes. After the electroplating is completed, it is cleaned and then heat-treated at 180-550 ℃, and the finished product is packaged.

[0044] The appearance of the obtai...

Embodiment 2

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

[0047] The preparation process is the same as in Example 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 60-90 μm; and the hardness is 920Hv. The sample is tested according to GB / T17897-1999 stainless steel ferric chloride pitting corrosion test method (6% FeCl3, 24h), and the test results are shown in Figure 9 ,as the picture shows, Figure 9 Picture a in the picture 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 Picture b in the middle is the topography of the tungsten alloy coating surface magnified by 200 times after the test. The coating surface is flat ...

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Abstract

The invention relates to a sand prevention filtering screen pipe for a high-salinity oil-gas well containing hydrogen sulfide and carbon dioxide in oil and gas production operation. A preparation method includes uniformly plating a nickel-tungsten-based alloy coating with high abrasion resistance and resistance to the hydrogen sulfide, the carbon dioxide and saturated brine corrosion on the outer surface of a common sulfur-resistant screen pipe, and the nickel-tungsten-based alloy coating comprises external threads at two ends and uniformly distributed through holes. The nickel-tungsten-based alloy coating is a Ni-W-X alloy coating or Ni-W-Y alloy coating or Ni-W-X-Y alloy coating, wherein X refers to Co and/or Fe, and Y refers to P and/or B. The screen pipe simultaneously has the advantages of high strength of the common screen pipe, high corrosion prevention and high abrasion resistance of tungsten alloy and the like, can effectively replace a stainless steel screen pipe, a high-chrome screen pipe and a nickel-based alloy screen pipe and is used for the oil-gas well containing the hydrogen sulfide, the carbon dioxide and saturated brine, and the manufacturing cost of the screen pipe is greatly saved. The screen pipe further has the advantages that base pipe models and drilling types can be randomly selected by customers, and the screen pipe is high in adaptability, wide in application range and the like.

Description

technical field [0001] The invention relates to a nickel-tungsten-based alloy coating screen tube used for sand control and filtering in oil and gas wells containing hydrogen sulfide, carbon dioxide and high salinity, and belongs to the field of petroleum machinery equipment. Background technique [0002] Sand control is an indispensable link in the exploitation of sand-producing oil and gas reservoirs. Mechanical sand control is one of the most commonly used oil well sand control methods in today's oilfields. 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 influence on the effect of sand control, cost and production of oil wells. At present, the development situation of oil and gas fields is becoming more and more severe, the wells are getting deeper and deeper, and the content of hydrogen sulfide and carbon dioxide is...

Claims

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Application Information

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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
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