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

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...

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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 has serious environmental protection problems

Due to the limitation of processing equipment, this process has not yet been implemented in deep hole processing and the application of related products at home and abroad.

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