Inner spray welding anticorrosive wear resistant oil pipe and machining method and machining device

A technology for anti-corrosion and wear-resistant processing equipment, applied in the field of deep-hole processing, can solve the problems of falling off, no deep-hole processing, easy peeling of the coating, etc., and achieves the effect of simple structure, improved anti-corrosion effect, and good anti-corrosion effect.

Inactive Publication Date: 2017-09-22
DONGYING XINJIA ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) Coated tubing: good temperature resistance. Due to the combination of the coating and the substrate, the coating is easy to peel and fall off under complex well conditions. At the same time, this process also ha

Method used

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  • Inner spray welding anticorrosive wear resistant oil pipe and machining method and machining device
  • Inner spray welding anticorrosive wear resistant oil pipe and machining method and machining device
  • Inner spray welding anticorrosive wear resistant oil pipe and machining method and machining device

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Experimental program
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Effect test

Embodiment 1

[0027] Reference figure 1 , The internal spray-welded anti-corrosion and wear-resistant pipe includes a pipe body 1 and an anti-corrosion and wear-resistant alloy layer 3 spray-welded on the inner hole wall of the pipe body 1. The processing method: clean the inner hole of the pipe body 1, spray-weld a layer of anti-corrosion and wear-resistant alloy 3 on the inner hole, and then process the threads, and connect with the ordinary coupling to form an anti-corrosion and wear-resistant oil pipe. This structured product has simple processing technology and low cost, and is suitable for oil wells with severe partial wear and less corrosiveness. Of course, the above-mentioned processing method is also suitable for the processing of deep-hole parts such as oil well pump barrel and long cylinder liner.

Embodiment 2

[0029] Such as figure 2 As shown, the processing technology: rough machining the end face and front end of the pipe body 1 (5mm-10mm from the end face), spray welding or surfacing the first corrosion-resistant alloy layer 4 at the rough machining part, clean the inner surface of the pipe body 1, and The surface of the hole is spray-welded with corrosion-resistant alloy layer 3 and threaded. Through the first corrosion-resistant alloy layer 4, the connection part of the pipe body 1 can be located here, which prevents the connection part from contacting corrosive liquid.

[0030] Such as image 3 As shown, a groove 6 is provided on the inner wall of the coupling 2, a second corrosion-resistant alloy layer 7 is sprayed or built-up welded in the groove 6, and the internal thread 8 is processed and connected.

[0031] Such as Figure 4 As shown, the pipe body 1 and the coupling 2 can be connected by connecting the external thread 5 and the connecting internal thread 8, and since their ...

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Abstract

The invention discloses an inner spray welding anticorrosive wear resistant oil pipe and a machining method and a machining device. The inner spray welding anticorrosive wear resistant oil pipe comprises a preheating sensing heating ring and a remelting sensing heating ring which are arranged on the outer surface of a pipe body in sequence; a sprayer, a nozzle and supports are arranged in the pipe body, each support is provided with two support rods, the bottoms of the support rods are provided with steel balls capable of freely rolling, and the steel balls are in contact with an inner hole surface of the pipe body; the outer surface of the pipe body is further provided with power idler wheels for pushing the pipe body to rotate and move forwards, the outer end of the pipe body is provided with a spray gun, the spray gun and the sprayer are connected by a powder feeding pipe, a mixed gas pipe and an outer pipe, a cooling water pipe is further arranged in the outer pipe, the outer pipe is filled with cooling water, a cooling water returning pipe is further arranged on the outer pipe, and the spray gun is provided with a hopper, an oxygen pipe, an acetylene pipe and a water inlet. The inner spray welding anticorrosive wear resistant oil pipe is simple in structure, not only the inner surface of an oil pipe but also the end surface and threads of the oil pipe can be subjected to corrosion prevention, a tensile strength of the threads is not affected, the corrosion prevention effect and a connecting strength of a joint are improved, and the corrosion prevention effect is good.

Description

Technical field [0001] The invention relates to deep hole processing such as oil pipes, casing pipes, and oil well pump barrels, in particular to an internal spray-welded anticorrosive and wear-resistant oil pipe and processing methods and processing equipment. Background technique [0002] At present, the anti-corrosion tubing used in oil fields mainly includes the following types: (1) Lining tubing: a. The tubing is lined with PE, high-density polyethylene and other non-metallic tubing, which has good anti-corrosion and wear-resistance effects, but has poor temperature resistance and does not exceed 80℃, it is not applicable to deep wells and thermal recovery wells, and the well flushing temperature cannot be too high, so the use range is limited. b. The tubing is lined with corrosion-resistant and temperature-resistant tubing such as stainless steel tubing and ceramic tubing. Due to the difference in thermal elongation between the lining material and the base material, there a...

Claims

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Application Information

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IPC IPC(8): B23P13/00
CPCB23P13/00
Inventor 谢伟李建华赵志平彭江滨
Owner DONGYING XINJIA ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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