Closed circulating heating thermal phosphorization device and phosphorization method

A closed circulation and chemical device technology, which is applied in the coating process of metal materials, can solve the problems of constant temperature, uneven spraying of chemical solution, etc., and achieve short phosphating treatment time, good corrosion resistance, and good film formation. fast response effect

Inactive Publication Date: 2010-04-21
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention proposes a closed cycle that is suitable for thermal phosphating treatment after repairing integral drill pipe threads that are more than 10 meters in length and have coating, rust and other impurities on the outer surface and in the water hole. Heating the thermal phosphating device, and the present invention provides a phosphating method for the device. The present invention can control the temperature, pressure and flow to carry out semi-immersed phosphating on the thread, which solves the difficulty of constant temperature and the spraying of liquid medicine in thermal phosphating. Uneven Technical Issues

Method used

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  • Closed circulating heating thermal phosphorization device and phosphorization method
  • Closed circulating heating thermal phosphorization device and phosphorization method
  • Closed circulating heating thermal phosphorization device and phosphorization method

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Embodiment 1

[0030] Refer to the attached figure 1 , the invention discloses a closed cycle heating thermal phosphating device, comprising a fluid heater 1, a phosphating tank 2, a heating controller, a nozzle 4, a circulation pipeline 5, a rubber retaining ring 6 and a rubber plug 7, the The fluid heater 1 and the phosphating tank 2 are connected through a circulation pipeline 5, the nozzle 4 is fixed above the phosphating tank 2, the water outlet of the circulation pipeline 5 is connected to the nozzle 4, and the drill pipe 9 is supported and set by the pipe frame 8 Above the phosphating tank 2, the rubber plug 7 is installed in the water hole of the drill pipe 9, the rubber retaining ring 6 is sleeved on the joint of the drill pipe 9, the inner wall of the rubber retaining ring 6 is in close contact with the outer wall of the nozzle 4, and the thread extends into the In the cavity formed by the spray head 4 and the rubber retaining ring 6 , the heating controller is connected with the f...

specific Embodiment approach

[0032] A preferred embodiment of the present invention is as follows:

[0033] Double-layer stainless steel phosphating tank 2, the interlayer is filled with insulation materials, and the bottom of the tank has a return pipe connection and a waste liquid discharge port. Both the fluid heater 1 and the circulation pipeline 5 are commercially available fluid heater 1 and circulation pipeline 5 with acid-resistant and high-temperature-resistant functions, which can heat the liquid medicine to 97 degrees Celsius within half an hour, and the medicine liquid passes through the circulation pipeline 5 It is used circularly between the fluid heater 1 and the phosphating tank 2. The heating controller adopts a commercially available heating controller, which is composed of an electric control cabinet and a temperature control system. The temperature control system can set the heating time and temperature. After the temperature reaches the setting, it will automatically stop heating. Whe...

Embodiment 3

[0046] The concrete phosphating step of this method is as follows:

[0047] a. Set the rubber retaining ring 6 on one end of the drill pipe 9 to be phosphated, move the phosphating tank 2, and make the outer wall of the nozzle 4 above the phosphating tank 2 closely contact with the inner wall of the rubber retaining ring 6;

[0048] b. Open the 5 valves of the circulation pipeline, start the circulation pump in the circulation pipeline 5, and when the pressure rises to 0.8Mpa and the circulation is smooth, start the fluid heater 1, and when the fluid heater 1 turns the phosphating solution in the phosphating tank 2 When heating to 95°C, open the nozzle 4 valve, close the empty-load liquid return pipe valve in the small circulation pipeline 5, and carry out the phosphating operation, and the phosphating time is 10-20 minutes;

[0049] c. After the phosphating is completed, open the valve of the no-load liquid return pipe in the large circulation pipeline 5, close the valve of t...

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Abstract

The invention discloses a closed circulating heating thermal phosphorization device and a phosphorization method, relating to the technical field of drilling tool thread phosphorization. The device comprises a fluid heater, a phosphorization pool, a heating controller, a spray head, a circulation pipeline, a rubber check ring and a rubber stopper, wherein the fluid heater and the phosphorization pool are connected through the circulation pipeline; the spray head is fixed above the phosphorization pool; a water outlet of the circulation pipeline is connected with the spray head; a drilling rod is supported by a pipe rack and arranged above the phosphorization pool; the rubber stopper is arranged in a water hole of the drilling rod; the rubber check ring is sleeved on a drilling rod joint, and the inner wall of the rubber check ring is in close contact with the outer wall of the spray head; threads extend into a cavity formed by the spray head and the rubber check ring; and the heating controller is connected with the fluid heater. The invention can control the temperature, the pressure and the flow to carry out semi-soaking type phosphorization on the threads so as to solve the technical problems of difficult temperature constancy and non-uniform medicine liquid spraying in thermal phosphorization.

Description

technical field [0001] The invention relates to the technical field of phosphating of drilling tool threads, in particular to a device and a phosphating method for phosphating the threads of drilling tools that cannot be subjected to integral immersion thermal phosphating. Background technique [0002] In my country's onshore oilfields, various pipe companies (or pipe stations) generally use copper plating or cold phosphating process for the thread surface treatment of newly processed joint threads and drill pipe collars after repairing. In general use, it can meet the actual needs. However, the copper plating process is not effective in improving the thread wear resistance and anti-sticking performance due to the slow coating speed on site and affects the coating thickness; the cold phosphating process is simple, but the phosphating effect is not as good as hot phosphating. Especially when the drilling tool to be phosphating cannot be placed indoors due to its large volume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07
Inventor 刘瑞军刘庆杰李培梅杨国荣刘生平何玉忠李润苗张长博
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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