Integral processing method for refabrication of waste oil tube

A technology of overall processing and process method, applied in the field of remanufacturing of mechanical and electrical products, can solve problems such as reduced service life of oil pipes and line pipes, scrapped oil wells, and ordinary oil pipes with a service life of less than two years, so as to reduce the number of waste products, reduce investment costs, The effect of increasing the number of repairable oil pipes

Inactive Publication Date: 2011-01-19
杨永利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to corrosion and wear, the service life of oil pipes and line pipes is greatly reduced. Especially with the development of drilling technology, the number of deviated wells and horizontal wells is increasing day by day. Under the action of gravity and external force, the direct contact with the pipe wall wears seriously, making the service life o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1. Pretreatment

[0014] Pretreatment is an important part of remanufacturing. It includes seven parts: coupling unloading, magnetic flux leakage detection, thread cutting, degreasing and descaling, straightening, sandblasting, and length sorting.

[0015] ① Remove the coupling

[0016] Using a hydraulic screwing machine to remove the old coupling is quick and does not damage the oil pipe.

[0017] ②Wall thickness detection

[0018] The degree of corrosion and wear of waste oil pipes is different. It must be identified before remanufacturing. The waste oil pipes with thin walls that cannot withstand the downhole pressure are selected, and the waste oil pipes with a wall thickness of 3 mm are selected. Oil wells generally have low pressure, usually no more than 10MPa; normal pressure water injection main line pressure is generally 18Mpa (high pressure water injection pressure ranges from 31-35MPa, ultra-high pressure water injection pressure is as high as 50MPa).

[...

Embodiment 2

[0038] Select the waste oil pipe with a wall thickness of 3.75mm to repair, the same as in Example 1.

Embodiment 3

[0040] Choose wall thickness 4mm waste oil pipe to repair, with embodiment 1.

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PUM

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Abstract

The invention relates to an integral processing method for refabrication of a waste oil tube, which comprises the steps of: pretreating: selecting a waste oil tube with wall thickness of above 3mm, dismantling a coupling, detecting magnetic flux leakage, cutting threads, removing oil and scales, aligning, blasting sand, and separating by lengths; lining ceramics: filling melted iron subjected to combustion synthesis into a plough groove and a corrosion groove which are eccentrically worn on the inner wall of the oil tube under the action of centrifugal force in a high-speed rotating centrifuge, metallurgically combining with the inner wall of the oil tube, and melting with a transition iron layer under a ceramic layer into a whole; and processing threads: processing threads at a tube discharging end by using a numerical control lathe and a precise carding tool, coating thread grease, and installing the coupling. A new waste-judging standard is made on the basis of the judging standard of the waste oil tube in an oil field, which greatly reduces the waste quantity of the oil tubes, and increases the quantity of repairable oil tubes. The service life of the repaired waste oil tubes is above 5 times longer than that of the original new oil tube, thus the operation cost of the oil field is greatly lowered.

Description

technical field [0001] The invention belongs to the remanufacturing industry of mechanical and electrical products, and relates to an overall processing method for remanufacturing waste oil pipes by using self-propagating high-temperature synthesis technology. Background technique [0002] The oil pipe is the pipe string steel pipe lowered into the casing of the oil well during the development of the oil and gas field, and it is the channel for the crude oil to be transported from the ground to the surface. At the same time, the oil pipe is also the second type of oil pipe after the casing in the special oil pipe, and the annual consumption of various oil fields in the country can reach hundreds of thousands of tons. Due to corrosion and wear, the service life of oil pipes and line pipes is greatly reduced. Especially with the development of drilling technology, the number of deviated wells and horizontal wells is increasing day by day. Under the action of gravity and exter...

Claims

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Application Information

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IPC IPC(8): B23P6/00
Inventor 杨永利孙世杰李振杰仲光哲
Owner 杨永利
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