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Wear-resistant and corrosion-resistant aluminum alloy drill rod preparation method and prepared aluminum alloy drill rod

An aluminum alloy, anti-corrosion technology, applied in the direction of drill pipe, drilling equipment, drill pipe, etc., can solve the problems that affect the efficiency of oil field drilling and production, electrochemical corrosion of joints, poor wear resistance of materials, etc., achieve good insulation performance, prevent electrical shock Double corrosion, the effect of improving corrosion resistance

Active Publication Date: 2017-06-13
SHAANXI TIANYUAN MATERIALS PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seriously affected the efficiency of oilfield drilling and production, resulting in economic losses
In the application process of aluminum alloy drill pipes imported from abroad, there are also problems of poor wear resistance of the material itself, and electrochemical corrosion is prone to occur at the joints.

Method used

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  • Wear-resistant and corrosion-resistant aluminum alloy drill rod preparation method and prepared aluminum alloy drill rod
  • Wear-resistant and corrosion-resistant aluminum alloy drill rod preparation method and prepared aluminum alloy drill rod
  • Wear-resistant and corrosion-resistant aluminum alloy drill rod preparation method and prepared aluminum alloy drill rod

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a wear-resistant and anti-corrosion aluminum alloy drill pipe of the present embodiment 1 is described in detail below, and the parameters in the process and the obtained results are shown in the corresponding data of the embodiment 1 in Table 1.

[0029] Step 1. Form the aluminum alloy drill pipe, decontaminate, degrease and deburr the surface.

[0030] Step 2, configuration solution 3: according to the number of kilograms shown in the data of Example 1 in Table 1, take by weighing Na 2 SiO 3 ·5H 2 O, Na 2 B 4 o 7 , KF, CON 2 h 4 、C 6 h 15 NO 3 , KOH as solute, add in the stainless steel tank 4 that 1000L deionized water is housed, mix well.

[0031] Step 3, hoisting the aluminum alloy drill pipe: the positive lead wire 1 is electrically connected closely with the aluminum alloy drill pipe 7, and the aluminum alloy drill pipe is hoisted; the negative lead wire 2 is closely electrically connected with the stainless steel auxiliary cathod...

Embodiment 2

[0039] The preparation of the aluminum alloy drill pipe in this embodiment 2, the method steps are the same as in embodiment 1, the difference is that the technical parameters corresponding to embodiment 2 shown in table 1 are adopted, and the wear-resistant layer obtained is also corresponding to embodiment 2 in table 1 shown in the data, and will not be repeated here.

[0040] In the process of sealing treatment in step 5 of the present invention, as long as the aluminum alloy drill pipe obtained in step 4 is soaked in 10-60g / l nickel acetate solution at 40-50°C for 18-25min, the effect of sealing treatment can be achieved. Further improve corrosion resistance

Embodiment 3

[0042] The preparation of the aluminum alloy drill pipe in this embodiment 3, the method steps are the same as in embodiment 1, the difference is that the technical parameters corresponding to embodiment 3 shown in table 1 are adopted, and the wear-resistant layer obtained is also corresponding to embodiment 3 in table 1 shown in the data, and will not be repeated here. The solution and parameters used in the sealing treatment of the aluminum alloy drill pipe obtained in Step 4 are different from those in Example 1, as shown in Example 3.

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Abstract

The invention relates to a wear-resistant and corrosion-resistant aluminum alloy drill rod preparation method which comprises the following steps: a drill rod is hoisted to a deionized aqueous solution in a stainless steel tank: 8-15 g / L of Na2SiO3.5H2O, 0.5-15 g / L of Na2B4O7, 0.5-15 g / L of KF, 0.5-5 g / L of CON2H4, 0.5-20 g / L of C6H15NO3 and 0.5-3 g / L of KOH; the drill rod is electrically connected with a positive electrode of a power supply, and a negative electrode is electrically connected with a stainless steel auxiliary cathode (5) and the stainless steel tank (4); a plurality of fluorine rubber rings (6) are uniformly distributed and sheathed on the stainless steel auxiliary cathode; the power supply is subjected to constant voltage control, the positive current density is 2-15 A / dm<2>, and when the positive voltage rises to 410-430 V, the negative voltage is loaded, so that the negative current density is 1-8 A / dm<2>; when the positive voltage rises to 500-540 V, the power supply is disconnected; after being taken out and cleaned, the drill rod is subjected to sealing treatment. The drill rod is wear-resistant, corrosion-resistant and long in service life.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment manufacturing for oil field exploitation and geological exploration, and provides a method for deep wells, ultra-deep wells, directional wells, and horizontal wells in oil fields, containing H 2 S and C 2 O The processing method of wear-resistant and anti-corrosion lightweight aluminum alloy drill pipe widely used in oil and gas wells. Background technique [0002] Petrochemical energy is still the main driving force for the development of today's society. With the continuous consumption of oil and natural gas, deep wells, ultra-deep wells and H-containing 2 S and C 2 The exploitation of oil and gas wells has become an important means to improve the benefits of oil and gas exploration and development and the competitiveness of oil companies, and it is also an inevitable trend of human development and utilization of resources. At present, steel drill pipes commonly used in horizont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/06C25D11/16C25D11/24C22C21/00E21B17/10
CPCC22C21/00C25D11/024C25D11/026C25D11/06C25D11/16C25D11/246E21B17/1085
Inventor 穆耀钊
Owner SHAANXI TIANYUAN MATERIALS PROTECTION TECH
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