阅读说明：本技术 一种连续油管在线淬火回火制造工艺 (Online quenching and tempering manufacturing process for coiled tubing ) 是由 刘海燕 孙兴旺 陈世杰 游艳平 张海超 王永英 孟涛 曲仲雷 于 2021-07-19 设计创作，主要内容包括：本发明提供一种连续油管在线淬火回火制造工艺,连续油管在高频焊接后进行全管体奥氏体化,然后进行淬火,淬火完成后进行管体定径,然后进行全管体回火处理；优点为：本发明通过连续油管在线淬火回火热处理工艺,提高连续油管的材料强度和疲劳寿命,解决连续油管的自锁问题,增加连续油管的下入深度。(The invention provides an online quenching and tempering manufacturing process of a coiled tubing, which comprises the steps of carrying out austenitization on the coiled tubing after high-frequency welding, then carrying out quenching, carrying out sizing on the coiled tubing after quenching, and then carrying out tempering treatment on the coiled tubing; has the advantages that: according to the invention, through the on-line quenching and tempering heat treatment process of the coiled tubing, the material strength and the fatigue life of the coiled tubing are improved, the self-locking problem of the coiled tubing is solved, and the running depth of the coiled tubing is increased.)

1. The utility model provides a coiled tubing is manufacturing process of quenching and tempering on line, online quenching and tempering manufacturing equipment includes make-up machine, high frequency welding machine, squeeze roll, induction heating furnace A, quenching water tank, sizing unit, induction heating furnace B and cylinder, its characterized in that:

the on-line quenching and tempering manufacturing process of the continuous oil pipe comprises the following steps:

1) after the steel strip lengthening line finishes steel strip lengthening operation, the large steel coil plate is moved to a forming main machine line to be aligned and fixed;

2) the steel strip enters a forming machine to be rolled and formed into a continuous oil pipe;

3) two sides of the coiled tubing after rough forming and fine forming are not closed, the coiled tubing enters a high-frequency welding machine, and the high-frequency welding machine melts two sides of the coiled tubing;

4) the coiled tubing with the melted edge enters an extrusion roller for extrusion;

5) welding seams are formed on the extruded continuous oil pipe, the continuous oil pipe enters an induction heating furnace A, and the continuous oil pipe is heated in the induction heating furnace A to be austenitized;

6) the austenitized continuous oil pipe enters a quenching water tank for quenching;

7) the quenched continuous oil pipe enters a sizing unit for sizing;

8) and (3) feeding the coiled tubing after sizing into an induction heating furnace B, heating the coiled tubing in the induction heating furnace B for tempering, and coiling the tempered coiled tubing onto a roller.

2. The on-line quenching and tempering manufacturing process of the coiled tubing according to claim 1, characterized in that: the induction heating furnace A is a medium-frequency induction heating furnace for online austenitizing of the continuous oil pipe.

3. The on-line quenching and tempering manufacturing process of the coiled tubing according to claim 1 or 2, characterized in that: the induction heating furnace A heats the coiled tubing to 950 ℃ for austenitizing.

4. The on-line quenching and tempering manufacturing process of the coiled tubing according to claim 1, characterized in that: the induction heating furnace B is a medium-frequency induction heating furnace for full-tube tempering.

5. The on-line quenching and tempering manufacturing process of the coiled tubing according to claim 1 or 4, characterized in that: and the induction heating furnace B heats the coiled tubing to 630 ℃ for tempering.

Technical Field

The invention relates to the technical field of coiled tubing manufacturing, in particular to an online quenching and tempering manufacturing process for coiled tubing.

Background

The Coiled Tubing (CT) is a new type oil gas tubing with high strength, high plasticity and certain corrosion resistance, and a single screwed joint with a length of thousands of meters, and can be wound on a roller for field operation in oil field. The continuous pipe operation has the unique advantages of high operation efficiency, less stratum damage, small occupied area, reusability and the like, and is widely applied in the world.

With the vigorous development of deep wells, ultra-deep wells, shale gas wells and shale oil wells, the coiled tubing is more and more widely applied, the penetration depth of the coiled tubing is more and more large, the strength of the coiled tubing is required to be higher and higher, and the original CT110 coiled tubing cannot meet the requirements of field operation.

Disclosure of Invention

The invention aims to provide an on-line quenching and tempering manufacturing process for a continuous oil pipe, aiming at solving the defects in the prior art.

The new technical scheme adopted by the invention is as follows: the on-line quenching and tempering manufacturing process of the continuous oil pipe comprises a forming machine, a high-frequency welding machine, an extrusion roller, an induction heating furnace A, a quenching water tank, a sizing unit, an induction heating furnace B and a roller, and comprises the following steps:

1) after the steel strip lengthening line finishes steel strip lengthening operation, the large steel coil plate is moved to a forming main machine line to be aligned and fixed;

2) the steel strip enters a forming machine to be rolled and formed into a continuous oil pipe;

3) two sides of the coiled tubing after rough forming and fine forming are not closed, the coiled tubing enters a high-frequency welding machine, and the high-frequency welding machine melts two sides of the coiled tubing;

4) the coiled tubing with the melted edge enters an extrusion roller for extrusion;

5) welding seams are formed on the extruded continuous oil pipe, the continuous oil pipe enters an induction heating furnace A, and the continuous oil pipe is heated in the induction heating furnace A to be austenitized;

6) the austenitized continuous oil pipe enters a quenching water tank for quenching;

7) the quenched continuous oil pipe enters a sizing unit for sizing;

8) and (3) feeding the coiled tubing after sizing into an induction heating furnace B, heating the coiled tubing in the induction heating furnace B for tempering, and coiling the tempered coiled tubing onto a roller.

The induction heating furnace A is a medium-frequency induction heating furnace for online austenitizing of the continuous oil pipe.

The induction heating furnace A heats the coiled tubing to 950 ℃ for austenitizing.

The induction heating furnace B is a medium-frequency induction heating furnace for full-tube tempering.

And the induction heating furnace B heats the coiled tubing to 630 ℃ for tempering.

The invention has the following beneficial effects: according to the invention, through the on-line quenching and tempering heat treatment process of the coiled tubing, the material strength and the fatigue life of the coiled tubing are improved, the self-locking problem of the coiled tubing is solved, and the running depth of the coiled tubing is increased.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Wherein: 1. the device comprises a large steel reel, 2, a forming machine, 3, a high-frequency welding machine, 4, an extrusion roller, 5, induction heating furnaces A and 6, a quenching water tank, 7, a sizing unit, 8, induction heating furnaces B and 9 and a roller.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention is described in further detail below with reference to the accompanying drawings:

the on-line quenching and tempering manufacturing process of the continuous oil pipe comprises a forming machine 2, a high-frequency welding machine 3, an extrusion roller 4, an induction heating furnace A5, a quenching water tank 6, a sizing unit 7, an induction heating furnace B8 and a roller 9, and comprises the following steps:

1) after the steel strip lengthening line finishes the steel strip lengthening operation, the large steel coil plate 1 is moved to a forming main machine line to be aligned and fixed;

2) the steel strip enters a forming machine 2 to be rolled and formed into a continuous oil pipe;

3) two sides of the coiled tubing after rough forming and fine forming are not closed, the coiled tubing enters a high-frequency welding machine 3, and the high-frequency welding machine 3 melts two sides of the coiled tubing;

4) the coiled tubing with the melted edge enters an extrusion roller 4 for extrusion;

5) a welding seam is arranged on the extruded continuous oil pipe, the continuous oil pipe enters an induction heating furnace A5, and the continuous oil pipe is heated in the induction heating furnace A5 to be austenitized;

6) the austenitized continuous oil pipe enters a quenching water pool 6 for quenching;

7) the quenched continuous oil pipe enters a sizing unit 7 for sizing;

8) and (3) feeding the coiled tubing after sizing into an induction heating furnace B8, heating the coiled tubing in the induction heating furnace B8 for tempering, and coiling the tempered coiled tubing on the roller 9.

The induction heating furnace A5 is a medium-frequency induction heating furnace for continuous oil pipe on-line austenitizing.

The induction heating furnace A5 heats the coiled tubing to 950 ℃ for austenitizing.

The induction heating furnace B8 is a medium-frequency induction heating furnace for full-tube tempering.

And the induction heating furnace B8 heats the coiled tubing to 630 ℃ for tempering.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.