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Pumping rod or oil sucking pipe electroplating iron-nickel/tungsten alloy double-layer coating and surface processing technology

An iron-nickel alloy and surface treatment technology, applied in the direction of metal layered products, drill pipes, drill pipes, etc., can solve the problems of poor compression and wear resistance, coating peeling, and expensive corrosion-resistant alloys. Wear and corrosion resistance, meet the requirements of use, and save the cost of electroplating

Active Publication Date: 2007-09-26
湖南纳菲尔新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For more than 100 years, researchers of oil production machinery have carried out a lot of research work on corrosion and wear problems. On the sucker rod, such as using corrosion-resistant alloys: for example, K-grade sucker rods use 20Ni2Mo, which contains Ni, Cr, Mo Corrosion-resistant alloys are more expensive; use anti-corrosion coatings: including metal coatings (such as hot-dipped aluminum, chrome plating, spraying nickel-based alloys) and non-metallic coatings (such as epoxy resin coatings), existing problems: coating peeling off , this kind of sucker rod cannot be used in inclined wells; use non-metal: glass fiber reinforced plastic sucker rod, carbon fiber composite material continuous sucker rod, these two kinds of sucker rods are relatively expensive, and have poor compression and wear resistance; use corrosion inhibition Agent: relatively expensive, the anti-corrosion effect is not ideal; on the oil suction pipe, nickel-phosphorus composite plating is used; inner coating technology; bimetallic oil pipe; nitriding; FRP-lined oil pipe
Although some results have been achieved, the problem has not been solved

Method used

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  • Pumping rod or oil sucking pipe electroplating iron-nickel/tungsten alloy double-layer coating and surface processing technology
  • Pumping rod or oil sucking pipe electroplating iron-nickel/tungsten alloy double-layer coating and surface processing technology
  • Pumping rod or oil sucking pipe electroplating iron-nickel/tungsten alloy double-layer coating and surface processing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: surface treatment of oil extraction pipe, material: N80

[0047] ①Preparation of solution

[0048]Iron-nickel plating solution:

[0049] Main raw materials: ferrous sulfate, nickel sulfate, boric acid, citrate, preparation process: after adding half a tank of clean water, then add the calculated amount of each main salt component of the plating solution, stir, adjust the pH value with ammonia water, add clean water to the use range , so that trial plating is possible.

[0050] Tungsten alloy plating solution:

[0051] Main raw materials: sodium tungstate, phosphorous acid, nickel sulfate, boric acid, citrate. Preparation process: After adding half a tank of clear water, then add the calculated amount of each main salt component of the plating solution, stir, add clear water to the use range, so that it can be used Trial plating.

[0052] ②Pretreatment of plated parts

[0053] There are chemical degreasing and electrolytic degreasing.

[0054] ③Workpi...

Embodiment 2

[0070] Embodiment 2: surface treatment of oil extraction pipe, material: N80

[0071] ①Preparation of solution, ②Pretreatment of plated parts, ③Workpiece activation, ⑤Dehydrogenation,

[0072] All the same as in Example 1. The difference lies in step ④

[0073] ④ Plating

[0074] After the plated parts are processed, they are put into the electroplating tank.

[0075] The electroplating iron-nickel solution components are:

[0076] FeSO 4 (0.5mol / l)+NiSO 4 (1.0mol / l)+H 3 cit(0.5mol / l)+H 3 BO 3 (0.8mol / l)

[0077] At a current density of 10A / dm 2 , using an iridium-containing intermediate layer of titanium-ruthenium-coated metal oxide anode, pH = 2.0, electroplating at a temperature of 50° C., and washing with deionized water three times after plating.

[0078] The components of the electroplating tungsten alloy solution are:

[0079] Na 2 WO 4 (0.01mol / l)+NiSO 4 (1.0mol / l)+H 3 cit(0.19mol / l)+H 3 PO 3 (0.3mol / l)+H 3 BO 3 (0.16mol / l)

[0080] At a current de...

Embodiment 3

[0083] Embodiment 3: surface treatment of oil extraction pipe, material: J55

[0084] ①Preparation of solution

[0085] Iron-nickel plating solution:

[0086] Main raw materials: ferrous sulfate, nickel sulfate, boric acid, citrate, preparation process: after adding half a tank of clean water, then add the calculated amount of each main salt component of the plating solution, stir, adjust the pH value with ammonia water, add clean water to the use range , so that trial plating is possible.

[0087] Tungsten alloy plating solution:

[0088] Main raw materials: sodium tungstate, phosphorous acid, nickel sulfate, boric acid, citrate. Preparation process: After adding half a tank of clear water, then add the calculated amount of each main salt component of the plating solution, stir, add clear water to the use range, so that it can be used Trial plating.

[0089] ②Pretreatment of plated parts

[0090] There are chemical degreasing and electrolytic degreasing.

[0091] ③Activ...

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Abstract

It relates to a surface treatment process. It uses oxide inert electrodes as the anode to apply ferro plating. It uses ferric persulfate, nickel sulfate dip, nickel carbonate, boracic acid and citrate as the main material, the electrodeposition coating mainly composed of FexNiy, with x=20-45, y=55-80, being amorphous nanocrystalline structure. The coating is the bottom layer, then tungsten alloy to get the final dual layer plating surface treatment. The plating layer is corrosion resistant, with hardness of 480-950Hv, with extensive application.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of oil field equipment, in particular to electroplating iron-nickel alloy and tungsten alloy coatings on oil sucker pipes and sucker rods and their surface treatment technology, so as to solve the problems encountered by the current oil production machinery in the application of mine fields. of problems, corrosion and wear. Background technique [0002] Sucker rods and tubing are used for oil recovery in oil fields. There are two world-class problems encountered in mines: corrosion and wear. Well fluids often contain CO 2 , H 2 Corrosive media such as S and brine can cause corrosion fatigue fracture of sucker rods, corrosion damage of oil well pumps and screw pumps, corrosion and perforation of oil pipes, and seriously affect crude oil production. Some pumping wells of Dongxin Oil Production Plant in Shengli Oilfield broke due to corrosion of couplings (45 steel, quenched and tempere...

Claims

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Application Information

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IPC IPC(8): E21B17/00B32B15/01C25D5/12C25D3/02
Inventor 何凤姣
Owner 湖南纳菲尔新材料科技股份有限公司
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