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Cooling device and method for butt welding of coiled tubing

A cooling device and coiled tube technology, applied in the field of material thermal processing, can solve problems such as performance degradation of welded joints, grain growth, etc.

Inactive Publication Date: 2013-10-16
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the welding heat process will promote the grain growth in the welding heat-affected zone, resulting in a decrease in the performance of the welded joint

Method used

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  • Cooling device and method for butt welding of coiled tubing
  • Cooling device and method for butt welding of coiled tubing
  • Cooling device and method for butt welding of coiled tubing

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Embodiment Construction

[0022] The present invention is described in detail below in conjunction with accompanying drawing.

[0023] refer to figure 1 : A cooling device for coiled pipe butt welding, comprising a water pump 2, the water pump 2 is placed in a water supply and return device 6 filled with sufficient water, the water outlet of the water pump is connected to the five-way joint 7 through a pipeline, and a flow rate is installed on the water pump outlet pipeline Adjusting device 3, the flow regulating device 3 is connected with the temperature measurement and control device 4, through manual adjustment and temperature measurement and control device 4 to control the flow adjustment, adjust the opening and closing of the gate valve to change the flow rate of the water pump; the five-way joint 7 is fixed On the partition 8; the four joints on the upper part of the five-way joint 7 are respectively connected to the four cooling block water inlet pipelines 5 and connected to two opposite cooling...

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Abstract

The invention discloses a cooling device and method for butting welding of coiled tubing. The cooling device systematically comprises cooling blocks, a water pump, a flow regulation device, a temperature measuring and controlling device, a connecting pipeline, a backwater supplying device and the like. During work, the copper cooling blocks which are matched with a to-be-welded coiled tubing are selected and mounted according to the outer diameter of the to-be-welded coiled tubing; and the connecting pipeline and a circuit are used for reducing heat effect of welding heat on a welded seam area when coiled tubing is welded, and the cooling speed of a connector and a welding heat effect area is increased, so that the width of the welding heat effect area is reduced, high-temperature dwell time is reduced, the grain growth tendency is slowed down, and the welding joint performance is improved.

Description

technical field [0001] The invention relates to the technical field of thermal processing of materials, in particular to a cooling device and method for continuous pipe butt welding. It is suitable for pipe-pipe butt welding of steel coiled tubing of various sizes and specifications currently in use with a yield strength grade of 482.65-689.5Mpa (70-100Kpsi), and is also suitable for other pipe-pipe butt welding that requires accelerated welding joints For cooling occasions. Background technique [0002] Coiled tubing (Coiled Tubing, referred to as CT, also known as coiled tubing, flexible tubing, serpentine tubing or coiled tubing) refers to the use of metal materials, mainly steel, which can be coiled on a large diameter (generally about 1m or more) On the reel, a pipe with a length of several hundred meters to several thousand meters without joints. The coiled tubing operation technology composed of coiled tubing and its operating machine is widely used in oil explorati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/00
Inventor 石凯刘彦明王洪铎
Owner XI'AN PETROLEUM UNIVERSITY
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