CN106869814B - With the continuous umbilical and its manufacturing method blocked in limit - Google Patents

Abstract

The invention relates to a coiled tubing cable with limited inner clips and a manufacturing method thereof. A cable is arranged in the coiled tubing, and clamping ferrules are arranged outside the cable at regular distances. The two ends of the ferrule Positioned between the limiting inner clips, the limiting inner clips are welded on the inner wall of the coiled tubing, and the ferrule is made of rigid or elastic material, which is interference fit and clamped with the surface of the cable. When the coiled umbilical cable according to the present invention is in use, on the one hand, most of the self-weight of the cable can be borne by the limiting inner clamp; The cable is not easy to be broken when bending or straightening. The continuous umbilical cable and its manufacturing method of the present invention are suitable for the technical field of petroleum engineering.

Description

Continuous umbilical cable with limited inner clip and manufacturing method thereof

technical field

The invention relates to a continuous umbilical cable with a limiting inner clip and a manufacturing method thereof, which is suitable for the technical field of petroleum engineering.

Background technique

Coiled tubing, also known as flexible tubing, can be as long as 10,000 meters in one roll, and can replace conventional tubing for many operations. Coiled tubing operation equipment has the characteristics of pressure operation and continuous lifting. The equipment is small in size, fast in operation cycle and low in cost. Since the 1990s, coiled tubing technology has developed by leaps and bounds. The coiled tubing operation device has been hailed as the "universal operation machine", which is widely used in workover, drilling, completion, logging and other operations in oil and gas fields, and runs through the whole process of oil and gas production. Taking well logging as an example, coiled tubing logging technology is a new technology popularized in the field of well testing in oil and gas fields in recent years. The technical outline is: the cable is penetrated and encapsulated in the coiled tubing, the end of the coiled tubing is connected to the logging instrument, and the ground equipment is used to send the logging instrument to the target well section for testing by relying on the stiffness and toughness of the coiled tubing itself. Depending on the logging depth, the length of the coiled tubing can reach several kilometers or even ten thousand meters. However, it is often found during construction that the cables in the coiled tubing with such a length often break. There are two main reasons for this:

First, when there is no interference fit between the outer tube and the inner cable of the continuous umbilical cable, the carrying capacity of the cable itself is limited, which may easily cause the inner tube cable to break, which limits the production and application of long-length products. At present, the main method is to select load-bearing cables and use steel wires to wrap the cables to achieve greater load capacity. However, in actual production, the welding temperature will cause destructive losses to the external steel wires. During use, when a cable of several thousand meters or even ten thousand meters runs through the tubing, it will break due to its own weight, resulting in the failure of the logging task.

Second, since the diameter of the cable is smaller than the diameter of the tubing (that is, the tubing and the cable are separated), when the coiled tubing with the cable inside is completed and coiled, the cable will be attached to the coiled tubing. inside. When going downhole, the cable is usually not attached to the inner side of the coiled tubing, but in the center. In order to make the two ends of the cable align with the two ends of the coiled tubing, the length requirement of the tubing when the cable is in the center of the tubing is greater than the length requirement when the cable is close to the inside of the coiled tubing when the cable is coiled, so when the cable When changing from the coiled state to the work centered state, breakage will occur due to the increased length requirements.

The Chinese patent application 201610008224.6 filed by the applicant on January 6, 2016 discloses a manufacturing method for coiled umbilical cables, in which the cables are encapsulated inside the coiled tubing when the coiled tubing is produced, and no additional equipment or steps are required to The cable runs through the coiled tubing, and the traditional ERW welding is replaced by laser welding technology, which effectively solves the internal burr and groove corrosion problems of the coiled tubing in the prior art. However, the technical solution of this application does not propose to solve the problem that the cable will break when it is long.

As disclosed in Chinese patent CN102305315A, the coiled tubing is lowered along the vertical well, and the cable is lowered into the coiled tubing. The cable penetrates all the coiled tubing by its own weight and then falls to the bottom to achieve penetration. The process is simple, safe and low in cost. Among them, the problem that the cable will break when the coiled tubing is long is not raised.

Therefore, there is a need in the prior art for a technology capable of avoiding cable breakage, so as to solve the above-mentioned problems in the prior art.

Contents of the invention

The present invention aims to solve the above-mentioned technical problems existing in the prior art, and provides a coiled umbilical cable with limited inner clamps. A cable is arranged in the coiled tubing, and clamping clamps are provided at intervals outside the cable. The two ends of the ferrule are positioned between the limiting inner clips, and the limiting inner clips are welded on the inner wall of the coiled tubing. The ferrule can be made of rigid or elastic material, which has an interference fit and clamps to the surface of the cable.

Preferably, the chemical composition of the limit inner card and the coiled tubing is: C: 0.1-0.12%, Cr: 1-1.2%, Ni: 0.7-0.72%, Mo: 0.3-0.33%, V: 0.1- 0.12%, Nb: 0.05-0.07%, B: 0.03-0.035%, P: 0.015-0.016%, S: 0.008-0.01%, the rest is Fe and unavoidable impurities;

The preparation process is as follows: first, the above components are smelted according to the corresponding mass percentage and cast into a slab; second, the slab is heated to 1235-1240°C, and the holding time is 2.0-2.2 min/mm, depending on the slab third, the temperature range of the final rolling is 790-795°C, and the temperature is kept for 10-15 minutes; fourth, quenching is carried out after heating to 1020-1026°C; fifth, high temperature tempering is carried out at 660-665°C Processing; Sixth, natural cooling in the air.

Preferably, the preparation method of the continuous umbilical cable of the present invention comprises the following steps:

(1) Supply the steel belt cleaning device from the supply reel, and use alkaline degreasing liquid to remove impurities on the surface of the steel belt;

(2) Make the steel strip pass through the rolling device to produce a preliminary U deformation, so as to form the shape of the coiled tubing;

(3) feeding armored cables or cables coated with high-temperature-resistant and heat-insulating ceramic coatings to the steel belt for forming coiled tubing between the rolling device and the tube forming device;

(4) On the steel strip forming the coiled tubing, weld limit inner clips at a certain distance, and then set ferrules on the outside of the cable, so that the ferrules are positioned between the limit inner clips;

(5) passing the steel strip through the tube forming device to form the shape of the coiled tubing;

(6) Laser welding is used to weld the butt seam of the steel strip into one;

(7) Calibrate the coiled tubing;

(9) Coiled tubing is packaged on reel.

Preferably, the rolling device includes a first rolling device, a second rolling device, a third rolling device and a fourth rolling device;

The first rolling equipment is an H-shaped pressure roller set in the center relative to the steel strip, which rotates around a horizontal axis, and its lower edge is rolled on the steel strip, so that both sides of the steel strip are bent upward, and the sides of the steel strip The ratio of the distance between the portion and the lower edge of the end H-type pressure roller to the total width of the steel strip is 0.1-0.2;

The second rolling equipment is a disc-shaped pressure roller set in the center relative to the steel strip, the ratio of its thickness to the total width of the steel strip is 0.6-0.8, and the angle between the rolling surface and the side of the second rolling equipment is The range is 100-110°;

The third rolling equipment is a disc-shaped pressure roller set in the center relative to the steel strip, the ratio of its thickness to the total width of the steel strip is 0.4-0.5, and the angle between the rolling surface and the side of the third rolling equipment is The range is 110-120°;

The fourth rolling equipment is a disc-shaped pressure roller set in the center relative to the steel strip, the ratio of its thickness to the total width of the steel strip is 0.2-0.3, and the angle between the rolling surface and the side of the fourth rolling equipment is The range is 110-120°.

Preferably, the tube forming device includes three sets of extrusion pair rollers, each group of extrusion pair rollers includes two I-shaped vertical rollers arranged in parallel, each vertical roller rotates around a vertical axis, and the three sets of extrusion pair rollers The distance between them decreases successively, and the steel belt successively passes through the space between the webs of the extruding pair of rollers;

The ratio of the width of the steel strip to the distance between the webs of the first extrusion pair of rollers is 1.8-2.3, and the ratio of the width of the steel strip to the distance between the webs of the second extrusion pair of rollers is 2.5-2.8, The ratio of the width of the steel strip to the distance between the webs of the third extrusion pair of rolls is 3.0-3.1.

Preferably, between steps (6) and (7), a step of removing burrs from the outer surface by using an outer burr removal device is added, so that the polished area smoothly transitions to the pipe contour line, and the surface finish is at least 600 grains.

The coiled umbilical cable prepared by the preparation method of the present invention has been improved in many aspects such as the components of the steel strip forming the coiled tubing, the production process, the forming equipment, the welding method and the anti-corrosion process, so that the produced strip is limited The continuous umbilical cable of Bitneka not only meets the strength requirements, but also meets the corrosion resistance problem in the working conditions, and has broad application prospects.

Description of drawings

Fig. 1 shows a schematic diagram of the manufacturing process of the continuous umbilical with limit internal clips of the present invention.

Figure 2 shows a first rolling apparatus of the present invention.

Figure 3 shows a second rolling apparatus of the present invention.

Figure 4 shows a third rolling apparatus of the present invention.

Fig. 5 shows a fourth rolling apparatus of the present invention.

Figure 6 shows a first pair of squeeze rolls of the present invention.

Figure 7 shows a second squeeze roll pair of the present invention.

Figure 8 shows a third squeeze roll pair of the present invention.

Fig. 9 shows a schematic diagram of a continuous umbilical with limit inner clips before tube forming.

FIG. 10 is a sectional view of FIG. 9 .

FIG. 11 is a top view of FIG. 9 .

Fig. 12 shows a schematic cross-sectional view of a continuous umbilical with limit inner clips according to the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

As shown in FIG. 12 , there is shown a schematic cross-sectional view of a continuous umbilical cable with a limiting inner clip according to the present invention. As shown in the figure, the cable 2 is set in the coiled tubing 1, and ferrule 3 is clamped at a certain distance outside the cable 2, and the two ends of the ferrule 3 are positioned between the stoppers 4, The limiting inner clip 4 is welded on the inner wall of the coiled tubing 1, wherein the limiting inner clip 4 is made of the same material as the coiled tubing. The ferrule 3 can be made of rigid or elastic material, and it is interference fit and clamped with the surface of the cable 2 .

When the coiled umbilical cable according to the present invention is in use, on the one hand, most of the self-weight of the cable can be borne by the limiting inner clip; Or the cable is not easy to be pulled when straightened. It should be understood that the number of cards within the limit in the figure is only for illustration, and those skilled in the art can make adjustments according to actual needs.

Introduce the continuous umbilical cable and its manufacturing method of the present invention with limit inner clip below:

Specifically, as shown in Fig. 1, the manufacturing system of the continuous umbilical cable with limit internal clips according to the present invention includes a tape supply reel, a cleaning device, a rolling device, a cable supply device, a limit internal clip welding device, tube forming device, tubing butt welding device and collecting reel. The supply reel is used to supply the steel strip, and the cleaning device contains alkaline degreasing liquid to remove impurities on the surface of the steel strip, such as anti-rust coating or other impurities. Alkaline degreasing solution is an aqueous solution based on alkaline cleaning agent, which makes animal and vegetable oils into water-soluble soaps through saponification. This soap is a surfactant and has an emulsifying effect on non-polar mineral oil, so it can be washed away. The rolling device is used to make the steel strip produce preliminary U deformation so as to form the shape of the coiled tubing. The cable feeding device is used to feed the cable into the steel belt for forming coiled tubing located between the rolling device and the tube forming device. The limit inner card welding device is used to weld the limit inner card to the inner surface of the U-shaped steel strip. The tubing butt welding device (preferably using a laser welding machine) is used to weld the butt seam of the steel strip forming the shape of the coiled tubing into one, and finally form a continuous umbilical cable with a limit inner clip and can realize the connection between the cable and the ferrule. Jam tight. Tube forming devices are used to form the steel strip into the shape of coiled tubing. The collecting reel is used to collect the final finished coiled tubing, which is packaged for use.

Since the cables encapsulated in the coiled tubing need to undergo laser welding at a later stage, ordinary cables with outer insulation layers cannot be directly used in the present invention. If you use a cable with an ordinary insulating layer, the following risks may occur: first, the spatter during laser welding may fall on the insulating layer, thereby ablating the insulating layer; second, if the insulating layer is heated to a greater degree Smoke will have a great impact on the quality of laser welding; third, the insulation layer may be damaged during heat treatment. In order to avoid the adverse effects of the high temperature treatment of coiled tubing on its internal cables, armored cables or cables coated with high-temperature-resistant and heat-insulating ceramic coatings can generally be used. Armoring is divided into steel tape armoring, thin steel wire armoring or thick steel wire armoring.

According to the continuous umbilical cable with limit inner clip and its manufacturing method of the present invention, it comprises the following steps:

(1) Supply the steel strip from the supply reel to the cleaning device, and use alkaline degreasing liquid to remove impurities on the surface of the steel strip, such as anti-rust coating or other impurities;

(2) Make the steel strip pass through the rolling device to produce a preliminary U deformation, so as to form the shape of the coiled tubing;

(3) feeding armored cables or cables coated with high-temperature-resistant and heat-insulating ceramic coatings to the steel belt for forming coiled tubing between the rolling device and the tube forming device;

(4) On the steel strip forming the coiled tubing, welding limit inner clips are welded at a certain distance, and then a ferrule is arranged on the outside of the cable, so that the ferrule is positioned between the limit inner clips;

(5) passing the steel strip through the tube forming device to form the shape of the coiled tubing;

(6) Laser welding is used to weld the butt seam of the steel strip into one;

(7) Calibrate the coiled tubing;

(8) Coil the coiled tubing.

Preferably, a step can also be added between the above steps (1) and (2): after the alkaline degreasing solution is used to clean the surface of the steel strip, the surface of the steel strip is ultrasonically cleaned with water to remove the degreasing solution on the surface; then after drying The blowing device dries the surface of the steel strip.

Preferably, in the above-mentioned step (4), the material of the limit inner card and the steel strip is the same.

Preferably, a step can also be added between the above steps (6) and (7): after the coiled tubing is formed by laser welding, a step of removing external burrs can also be added, and the external burrs can be physically removed by a burr removal device, or the external burrs can be removed Apply burr removal solution to concentrated areas to chemically remove.

Preferably, after the coiled tubing is sized, an anti-corrosion agent can be applied to the outer surface of the coiled tubing to prevent corrosion on the surface of the coiled tubing.

Since welding is required between the limit inner card and the steel belt, and in the downhole state, the limit inner card needs to bear the gravity of the ferrule and the cable, so the steel belt and the limit inner card in the present invention adopt excellent welding performance of low carbon alloy steel or corrosion resistant alloys.

Preferably, the chemical composition of the limit inner card and steel strip in the present invention is: C: 0.1-0.12%, Cr: 1-1.2%, Ni: 0.7-0.72%, Mo: 0.3-0.33%, V: 0.1-0.12%, Nb: 0.05-0.07%, B: 0.03-0.035%, P: 0.015-0.016%, S: 0.008-0.01%, and the rest are Fe and unavoidable impurities. The preparation process is as follows: first, the above components are smelted according to the corresponding mass percentage and cast into a slab; second, the slab is heated to 1235-1240°C, and the holding time is 2.0-2.2 min/mm, depending on the slab third, the temperature range of the final rolling is 790-795°C, and the temperature is kept for 10-15 minutes; fourth, quenching is carried out after heating to 1020-1026°C; fifth, high temperature tempering is carried out at 660-665°C Processing; Sixth, natural cooling in the air.

Preferred embodiment 1 of limit inner card and steel band:

The chemical composition of the limit inner card and the steel strip is: C: 0.1%, Cr: 1.2%, Ni: 0.72%, Mo: 0.32%, V: 0.11%, Nb: 0.05%, B: 0.034%, P: 0.015%, S: 0.008%, and the rest are Fe and unavoidable impurities.

Preferred embodiment 2 of limit inner card and steel band:

The chemical composition of the limit inner card and the steel strip is: C: 0.11%, Cr: 1.1%, Ni: 0.7%, Mo: 0.3%, V: 0.1%, Nb: 0.06%, B: 0.032%, P: 0.015%, S: 0.009%, and the rest are Fe and unavoidable impurities.

Preferred embodiment 3 of limit inner card and steel band:

The chemical composition of the limit inner card and the steel strip is: C: 0.12%, Cr: 1%, Ni: 0.71%, Mo: 0.3%, V: 0.12%, Nb: 0.05%, B: 0.035%, P: 0.016%, S: 0.01%, and the rest are Fe and unavoidable impurities.

The preferred preparation process is as follows: first, the above components are smelted according to the corresponding mass percentage and cast into a slab; second, the slab is heated to 1236°C, and the holding time is 2.0 min/mm, depending on the thickness of the slab; Third, the final rolling temperature control range is 792°C, and the temperature is kept for 15 minutes; fourth, quenching is carried out after heating to 1024°C; fifth, high temperature tempering is carried out at 664°C; sixth, natural cooling in air. The steel strip after the above heat treatment not only has excellent welding performance, but also has excellent ductility and plasticity, which can greatly improve the service life of the coiled tubing.

The steel strip fed from the supply reel then passes through a cleaning device to remove impurities on the surface of the steel strip, such as anti-rust coating or other impurities. Preferably, the alkaline degreasing liquid in the cleaning device is composed of sodium hydroxide, sodium carbonate, sodium silicate and water, and the mass fractions of each component are respectively 0.7% sodium hydroxide, 8% sodium carbonate, and 3.5% sodium silicate , the rest is water, and the temperature of the degreasing liquid is kept at 85±5°C during the degreasing process. After degreasing, the steel strip passes through an ultrasonic cleaning device equipped with clean water to clean the surface of the steel strip to remove the degreasing liquid attached to the surface of the steel strip. Then dry the surface of the steel strip through a drying blower.

The cleaned steel strip then passes through a rolling device, as shown in Figures 2-5, which shows that the rolling device according to the present invention comprises a first rolling device as shown in Figure 2, a first rolling device as shown in Figure 3 Two rolling equipment, the third rolling equipment as shown in Figure 4 and the fourth rolling equipment as shown in Figure 5. After the steel strip passes through the above-mentioned first rolling equipment, second rolling equipment, third rolling equipment and fourth rolling equipment in sequence, it basically meets the deformation conditions required for forming coiled tubing.

It should be noted that all the pressure rollers in the drawings are schematic, drawn only for the need of clear illustration, and do not represent the real shape of the pressure rollers. The pressure rollers actually used can have different shapes and sizes according to the needs of forming the steel strip, so as to ensure that the coiled tubing of standard specifications is formed by the steel strip. The pressure applied by the pressure roller to the steel strip satisfies the condition that it can be plastically deformed to form a bent part, but it will not affect its cross-sectional thickness.

As shown in Fig. 2, the first rolling equipment is an H-shaped pressing roller set in the center relative to the steel strip 10, which rotates around the horizontal axis L, and its lower edge is rolled on the steel strip, so that the two sides of the steel strip produce upward pressure. bending. Preferably, the ratio of the distance between the side of the steel strip and the lower edge of the end H-shaped pressure roller to the total width of the steel strip is 0.1-0.2, preferably 0.15.

As shown in FIG. 3 , the second rolling device is a disc-shaped pressing roller arranged centrally relative to the steel strip 10 , and the ratio of its thickness to the total width of the steel strip is 0.6-0.8, preferably 0.8. The angle α between the rolling surface and the side surface of the second rolling device is in the range of 100-110°, preferably 100°. The rolling surface of the second rolling equipment is a smooth transition curved surface.

As shown in FIG. 4 , the third rolling device is a disc-shaped pressing roller arranged centrally relative to the steel strip 10 , and the ratio of its thickness to the total width of the steel strip is 0.4-0.5, preferably 0.5. The angle α between the rolling surface and the side surface of the third rolling device is in the range of 110-120°, preferably 110°. The rolling surface of the third rolling equipment is a smooth transition curved surface.

As shown in FIG. 5 , the fourth rolling device is a disc-shaped pressing roller arranged centrally relative to the steel strip 10 , and the ratio of its thickness to the total width of the steel strip is 0.2-0.3, preferably 0.3. The angle α between the rolling surface and the side surface of the fourth rolling device is in the range of 110-120°, preferably 120°. The rolling surface of the fourth rolling equipment is a curved surface with smooth transition.

As shown in Figure 2-5, after the steel strip passes through the above-mentioned first rolling equipment, second rolling equipment, third rolling equipment and fourth rolling equipment in sequence, it basically meets the deformation conditions required for forming coiled tubing. Then, before the deformed steel strip passes through the tube forming device, the internal clamp is welded, the cable is added and the ferrule is placed, so that the shape of the continuous tube cable with the limited internal clamp can be formed. The tube forming device according to the present invention includes three pairs of extrusion rollers, as shown in Figures 6-8 respectively, each of which contains cables. It should be noted that the rolling device and the tube forming device shown in the drawings of the present invention are schematic and non-limitative, and those skilled in the art can make various possible deformations and selections according to actual needs.

As shown in Figure 6-8, each set of extrusion pair of rollers includes two I-shaped vertical rollers arranged in parallel, each vertical roller can rotate around the vertical axis V, and the distance between the three sets of extrusion pair of rollers is in order Decrease, the steel strip passes through the space between the webs of the extrusion pair of rollers sequentially. It should be noted that the extrusion pair of rollers in the accompanying drawings 6-8 are all schematic, drawn only for the need of clear illustration, and do not represent the real shape of the extrusion pair of rollers. The actual extrusion pair of rolls can have different shapes and sizes according to the requirements of steel strip forming, so as to ensure the formation of standard coiled tubing. In particular, the area where the web of the vertical roll comes into contact with the strip has a shape adapted to the surface of the curved strip.

As shown in Figure 6, wherein the first squeeze pair of rolls is shown, the ratio of the width of the steel strip to the distance (clear distance, the same below) between the webs of the first squeeze pair of rolls is 1.8-2.3, preferably can is 2.0.

As shown in Fig. 7, in which the second extrusion pair of rolls is shown, the ratio of the width of the steel strip to the distance between the webs of the second extrusion pair of rollers is 2.5-2.8, preferably 2.7.

As shown in Fig. 8, where the third pair of squeeze rolls is shown, the ratio of the width of the steel strip to the distance between the webs of the third pair of squeeze rolls is 3.0-3.1, preferably 3.0. After passing through the third extrusion pair of rollers, the steel strip basically forms the shape of the coiled tubing.

Next, the coiled tubing goes through a laser welding machine that uses a laser to weld the butt seams of the coiled tubing together. Since laser welding requires high precision, it is necessary to use clamping equipment to accurately position the coiled tubing during welding, and then place the welded part within the focus range of the laser beam. As mentioned above, compared with ERW welding, laser welding can greatly reduce the height of internal burrs and can effectively prevent groove corrosion problems. In the present invention, the preparation of a coiled tubing with a size of Φ38.1 mm*3.2 mm (diameter*wall thickness) is taken as an example for illustration. Preferably, the spot diameter of laser welding is 2 mm, the welding power is 7580 W, the focal length is 230 mm, and the welding speed is 1.5 m/min. More preferably, argon is used as shielding gas during welding. The intensity of laser welding is controlled so that its energy can just penetrate the wall thickness of the continuous steel pipe.

After the coiled tubing is formed by laser welding, a step of removing external burrs can also be added. Specifically, the external burrs can be physically removed by a burr removal device, or can be removed by applying a burr removal liquid to the area where the external burrs are concentrated. Preferably, the deburring liquid can be composed of water, benzoic acid, tartaric acid, salicylic acid, hydrogen peroxide, urea, potassium gluconate, and sodium butyrate in a mass ratio of 1:0.1-0.12:0.08-0.1:0.05-0.07: 0.06-0.1:0.01-0.05:0.02-0.04:0-0.02 is made by mixing evenly. When in use, apply the above-mentioned burr removal solution evenly on the area where the outer burrs are concentrated.

Burr removal solution embodiment 1

The burr removal liquid is prepared by mixing water, benzoic acid, tartaric acid, salicylic acid, hydrogen peroxide, urea, potassium gluconate, and sodium butyrate according to the mass ratio of 1:0.12:0.1:0.07:0.1:0.03:0.03:0.02 to make.

Burr removal solution embodiment 2

The burr removal liquid is prepared by mixing water, benzoic acid, tartaric acid, salicylic acid, hydrogen peroxide, urea, potassium gluconate, and sodium butyrate according to the mass ratio of 1:0.1:0.09:0.06:0.08:0.04:0.04:0.01 to make.

Burr removal solution embodiment 3

The deburring solution is made by mixing water, benzoic acid, tartaric acid, salicylic acid, hydrogen peroxide, urea, and potassium gluconate in a mass ratio of 1:0.11:0.08:0.05:0.07:0.05:0.02.

Next, sizing the coiled tubing.

Specifically, a sizing machine may be used to sizing the coiled tubing. The so-called sizing is a term in the field of steel pipe production. Generally, the raw material pipe is sent to the roller table of the pusher, and the thrust of the hydraulic cylinder is used to push the raw material pipe into the adjusted roll pass to correct the ovality of the raw material pipe.

Next, the coiled tubing is encapsulated, and the sized coiled tubing is coiled.

Preferably, after the coiled tubing is sized, an anti-corrosion agent can be applied to the outer surface of the coiled tubing to prevent corrosion on the surface of the coiled tubing.

As mentioned above, the present invention provides a coiled umbilical with limit internal clips and its manufacturing method, from the steel strip forming the coiled tubing and the components and production process of the limit internal clips, forming equipment, welding methods and anti The corrosion process and other aspects have been improved, and the cable can be penetrated through the coiled tubing without additional equipment or steps, so that the produced coiled tubing with a limit inner clip not only meets the strength requirements, but also meets the operating requirements. The problem of corrosion resistance in the environment has broad application prospects.

Although the embodiments disclosed in the present invention are as above, the described content is only an embodiment adopted for the convenience of understanding the present invention, and is not intended to limit the present invention. Anyone skilled in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention, The scope defined by the appended claims must still prevail.

Claims (6)

1. a kind of with the continuous umbilical blocked in limit, which is characterized in that cable is equipped in coiled tubing, in the outside of cable It is provided with the cutting ferrule of clamping at a certain distance, the both ends of cutting ferrule are located in limit between card, and card is welded in continuous in limit On the inner wall of oil pipe；

The chemical component of card and coiled tubing is according to mass percent in limit：C：0.1-0.12%, Cr：1-1.2%, Ni： 0.7-0.72%, Mo：0.3-0.33%, V：0.1-0.12%, Nb：0.05-0.07%, B：0.03-0.035%, P：0.015- 0.016%, S：0.008-0.01%, remaining is Fe and inevitable impurity；

Preparation process is：First, said components are smelted according to corresponding mass percent and are cast into slab；Second, by plate Base is heated to 1235-1240 DEG C, and soaking time is 2.0-2.2 points/millimeter, the thickness depending on slab；Third, finishing temperature control Range processed is 790-795 DEG C, keeps the temperature 10-15 minutes；4th, it is quenched after being heated to 1020-1026 DEG C；5th, High tempering processing is carried out at 660-665 DEG C；6th, natural cooling in air.

2. continuous umbilical according to claim 1, which is characterized in that cutting ferrule is made of rigidity or elastic material, with line It is interference fitted and clamps between the surface of cable.

3. a kind of manufacturing method of continuous umbilical as described in claim 1, which is characterized in that include the following steps：

(1) steel band is supplied to cleaning device from feed reel, utilize the impurity of alkaline degreaser removal steel strip surface；

(2) make steel band by rolling device, to generate preliminary U deformation, convenient for forming the shape of coiled tubing；

(3) cable that high temperature resistant heat insulation ceramic coating is applied by armored cable or outside is supplied in rolling device and pipe molding dress Being used to form in the steel band of coiled tubing between setting；

(4) formed coiled tubing steel band at interval of at a certain distance from welded limiting in block, then set on the outside of cable Cutting ferrule is set, so that cutting ferrule is located in limit between card；

(5) make steel band by pipe forming apparatus, to form the shape of coiled tubing；

(6) using method for laser welding that the butt welding of steel band is integral；

(7) sizing processing is carried out to coiled tubing；

(8) reel encapsulation is carried out to coiled tubing.

4. manufacturing method according to claim 3, which is characterized in that the rolling device includes the first rolling equipment, the Two rolling equipments, third rolling equipment and the 4th rolling equipment；

First rolling equipment is the H-type pressure roller being centrally located relative to steel band, is rotated around horizontal axis, lower edge roll-in On steel band, the two sides of steel band is made to generate upward bending, the distance between the lower edge of the side of steel band and the end H-type pressure roller Ratio with steel band overall width is 0.1-0.2；

Second rolling equipment is the plate-like pressure roller being centrally located relative to steel band, and the ratio of thickness and steel band overall width is 0.6-0.8, the range of the angle between the rolling surface and side of the second rolling equipment are 100-110 °；

The third rolling equipment is the plate-like pressure roller being centrally located relative to steel band, and the ratio of thickness and steel band overall width is 0.4-0.5, the range of the angle between the rolling surface and side of third rolling equipment are 110-120 °；

4th rolling equipment is the plate-like pressure roller being centrally located relative to steel band, and the ratio of thickness and steel band overall width is 0.2-0.3, the range of the angle between the rolling surface and side of the 4th rolling equipment are 110-120 °.

5. manufacturing method according to claim 3 or 4, which is characterized in that the pipe forming apparatus includes three groups of extruding pair Roller, every group of extruding include two I-shaped edger rolls of parallel arrangement to roller, and each edger roll is rotated around vertical axis, three groups of extruding pair Spacing between roller is sequentially reduced, and steel band successively passes through extruding to the space between the web of roller；

The width of steel band and the first extruding are 1.8-2.3, the width of steel band and second to the ratio of the distance between the web of roller Squeezing to the ratio of the distance between the web of roller is 2.5-2.8, and the width and third of steel band are squeezed between the web of roller The ratio of distance is 3.0-3.1.

6. manufacturing method according to claim 3 or 4, which is characterized in that increase to utilize between step (6) and (7) and go Except burr equipment the step of removing the burr of outer surface, be smoothly transitted into polishing region on pipe profiles line, surface light Cleanliness is at least 600 granularities.