CN218670981U - Coilable tube - Google Patents

Abstract

The utility model relates to a compound tubular product technical field discloses a can coil tubular product. The pipe comprises a core pipe (20) with a medium flow channel with the same cross section and a corrugated protection layer (10) sleeved on the outer side of the core pipe (20), wherein the outer surface of the core pipe (20) is attached to the minimum inner diameter of the corrugated protection layer (10), and the corrugated protection layer (10) at least comprises a metal corrugated protection layer (11), an anti-corrosion layer (12) and a plastic outer protection layer (13) which are arranged from inside to outside. Through the technical scheme, the utility model provides high tubular product's rigidity has increased tubular product's axial tensile ability and anti external pressure ability, has guaranteed the circularity of core pipe for tubular product is coiled, unreel and lay the time do not damage core pipe. And the corrugated protective layer is provided with a plastic outer protective layer at the outer sides of the metal corrugated protective layer and the anticorrosive layer, so that the anticorrosive layer and the metal corrugated outer protective layer are further protected.

Description

Coilable tube

Technical Field

The utility model relates to a compound tubular product technical field specifically relates to a can coil tubular product.

Background

Reinforced Thermoplastic Pipes (RTP for short) can be classified into oil production wellhead Pipes (applied between an oil well and a separation station, a gathering station and a water injection station), underground Pipes, ocean conveying Pipes, ocean oil platform Pipes and the like according to application scenes. The national energy agency successively issues standards of SY/T6662.1-2012, SY/T6794-2018, SY/T6662.2-2020 and the like, and the standards not only standardize the use of non-metal composite tubes in industries such as petroleum and natural gas, but also improve the requirements on the performance of RTP tubes.

In the prior art, the performance of an enhancement layer of an RTP pipe without a protective layer is easy to damage and lose efficacy under the repeated impact of waves in the process of ocean platform or ocean transportation. In addition, the underground pipe is subjected to axial tension such as gravity and the like vertically downward during installation and use, so that the structure of the underground pipe is easily damaged.

Therefore, it is necessary to provide a pipe material which further improves the performance of the pipe material while meeting the requirements of national standards.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the relatively poor problem of tubular product performance that prior art exists, providing a can coil tubular product, this can coil tubular product has the advantage that can improve tensile, resistance to compression performance of tubular product.

In order to achieve the above object, an aspect of the present invention provides a coilable pipe, wherein the pipe comprises a core pipe having a uniform cross-section medium flowing channel and a corrugated protection layer sleeved on the outside of the core pipe, the outer surface of the core pipe is attached to the minimum inner diameter of the corrugated protection layer, and the corrugated protection layer at least comprises a metal corrugated protection layer, an anti-corrosion layer and a plastic outer protection layer arranged from inside to outside.

Optionally, the core tube is a pure plastic core tube.

Optionally, the corrugated protection layer comprises a polyester film layer located between the anticorrosion layer and the plastic outer protection layer, and the polyester film layer is wound on the outer side of the anticorrosion layer.

Optionally, the core pipe is sequentially provided with an inner plastic layer, a reinforcing layer and an outer plastic layer from inside to outside, wherein the reinforcing layer is wound on the outer side of the inner plastic layer.

Optionally, the core tube includes a wear-resistant layer located inside the plastic inner layer, and/or the plastic inner layer and the plastic outer layer are both made of high-density polyethylene.

Optionally, the wear-resistant layer is made of nylon, and the wear-resistant layer is bonded to the inner surface of the plastic inner layer through an adhesive.

Optionally, the plastics inlayer is first plastics inlayer, barrier layer and second plastics inlayer from interior to exterior in proper order, the inside and outside both sides of barrier layer respectively through the adhesive with first plastics inlayer and the bonding of second plastics inlayer, wherein, first plastics inlayer, second plastics inlayer and the outer material of plastics is high density polyethylene.

Optionally, the outer side of the plastic outer layer is provided with a sliding layer to enable the corrugated protection layer to move axially relative to the core tube.

Optionally, the coilable tubing includes an energy transmission device located between the core tube and the corrugated protective layer and arranged axially along an outer surface of the core tube.

Optionally, a heat insulation layer is arranged between the anticorrosive layer and the plastic outer protection layer, and/or a heat insulation layer is arranged between the core pipe and the corrugated protection layer.

Through the technical scheme, the utility model discloses in set up the ripple protective layer through the outside at the core pipe, improved the rigidity of tubular product, increased the axial tensile ability and the anti external pressure ability of tubular product, guaranteed the circularity of core pipe for tubular product is coiled, is unreeled and is laid the time do not damage core pipe. And, the utility model provides a corrugated protection layer sets up the plastics outer protective layer in the outside of metal corrugated protection layer and anticorrosive coating, utilizes the anti fish tail of plastics material and wear-resisting characteristic, further protects anticorrosive coating and metal corrugated outer protective layer.

Drawings

FIG. 1 is a half-sectional view of one embodiment of a coilable tubing of the present invention;

FIG. 2 is an enlarged schematic view at I of FIG. 1;

FIG. 3 isbase:Sub>A cross-sectional view A-A of one embodiment of the coilable tubing of FIG. 1;

FIG. 4 isbase:Sub>A cross-sectional view A-A of another embodiment of the coilable tubing of FIG. 1;

FIG. 5 is a half-sectional view of another embodiment of the coilable tubing of the present invention;

FIG. 6 is an enlarged schematic view at II of FIG. 5;

FIG. 7 is a half-sectional view of yet another embodiment of the coilable tubing of the present invention;

FIG. 8 is an enlarged schematic view at III of FIG. 7;

FIG. 9 is a half-sectional view of yet another embodiment of the coilable tubing of the present invention;

FIG. 10 is an enlarged schematic view at IV in FIG. 9;

FIG. 11 is a half-sectional view of yet another embodiment of the coilable tubing of the present invention;

FIG. 12 is an enlarged schematic view at V of FIG. 11;

FIG. 13 is a cross-sectional view taken at B-B of FIG. 11;

FIG. 14 shows an embodiment of the outer contour of the corrugated protective layer according to the present invention;

FIG. 15 shows another embodiment of the outer contour shape of the corrugated protective layer according to the present invention;

FIG. 16 shows another embodiment of the outer contour shape of the corrugated armor layer of the present invention;

FIG. 17 shows another embodiment of the outer contour of the corrugated protective layer according to the present invention;

fig. 18 shows another embodiment of the outline shape of the corrugated protective layer according to the present invention.

Description of the reference numerals

10-a corrugated protective layer; 11-a metal corrugated protective layer; 12-an anticorrosive layer; 13-a plastic outer protective layer; 14-a polyester film layer; 20-core tube; 21-pure plastic core tube; 22-inner plastic layer; 221-a first plastic inner layer; 222-a barrier layer; 223-a second plastic inner layer; 224-a binder; 23-an enhancement layer; 24-an outer layer of plastic; 25-a wear resistant layer; 26-a sliding layer; 30-energy transmission means.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention. In the present invention, the terms of orientation such as "inside and outside" used in the case where no description is given to the contrary mean inside and outside with respect to the outline of each member itself.

The utility model provides a can coil tubular product, corrugated protection layer 10 in this core pipe 20 outside is located including core pipe 20 and the cover that has uniform cross section medium circulation passageway, core pipe 20's surface with the laminating of corrugated protection layer 10's minimum internal diameter department, corrugated protection layer 10 includes metal ripple protective layer 11, anticorrosive coating 12 and the outer protective layer 13 of plastics that from interior to exterior arranged at least. The material of the anticorrosive layer 12 may be epoxy asphalt, asphalt cloth or heavy anticorrosive paint. In addition, the corrosion protection layer 12 may be a single layer corrosion protection layer or a multi-layer corrosion protection layer, wherein the multi-layer corrosion protection layer may be, for example, a combination of multiple corrosion protection structures formed by winding multiple layers of corrosion protection cloth.

Through the technical scheme, the utility model discloses in set up corrugated protection layer 10 through the outside at core pipe 20, improved the rigidity of tubular product, increased the axial tensile ability and the anti external pressure ability of tubular product, guaranteed core pipe 20's circularity for tubular product is coiled, unreel and lay the time do not damage core pipe. And, the utility model provides a corrugated protection layer 10 sets up plastics outer protective layer 13 in the outside of metal corrugated protection layer 11 and anticorrosive coating 12, utilizes the anti fish tail and the wear-resisting characteristic of plastics material, further protects anticorrosive coating 12 and metal corrugated outer protective layer 11.

Specifically, in an embodiment of the present invention, the outer surface of the core tube 20 is attached to the minimum inner diameter of the corrugated protection layer 10 without adhesion, and the plastic outer protection layer 13 is attached to the corrosion prevention layer 12 without adhesion. Further, the tubing herein is flexible, coilable, having an outer diameter of 2 inches to 8 inches, with coils commonly used in international and domestic applications below 6 inches. To reduce the joints between the pipes, 1 coiled pipe is larger than 200 meters.

As shown in fig. 1 to 3, in an embodiment of the present invention, the core tube 20 may be a pure plastic core tube 21.

The utility model provides a can coil tubular product and when using to scenes such as oil, ocean drilling platform as well head conveyer pipe, downhole pipe, can need to heat the medium of transmission in the core pipe 20 sometimes, or with cables such as communication detection together along with tubular product transfer to well or platform. Thus, as shown in fig. 4, in a preferred embodiment of the present invention, the coilable tubing includes an energy transmission device 30 located between the core tube 20 and the corrugated protective layer 10 and axially disposed along the outer surface of the core tube 20. The arrangement of the energy transmission devices 30 may be a single, a bundle or a flat band, depending on the application. Furthermore, the energy transmission device 30 may be a communication cable, a detection cable, an optical cable or a heating wire according to the signal or energy to be transmitted. It is understood that a plurality of energy transmission devices 30 may be disposed between the core tube 20 and the corrugated protective layer 10 to extend axially along the outer surface of the core tube 20, and the kinds of the energy transmission devices 30 may be one or more.

Further, in order to insulate the medium transmitted in the core pipe 20, an insulating layer may be disposed between the anticorrosive layer 12 and the plastic outer protective layer 13, and an insulating layer may be disposed between the core pipe 20 and the corrugated protective layer 10.

As a preferred embodiment, referring to fig. 5 and 6, the core tube 20 includes an inner plastic layer 22, a reinforcing layer 23, and an outer plastic layer 24 in sequence from inside to outside, wherein the reinforcing layer 23 is wound around the outer side of the inner plastic layer 22, and both the inner plastic layer 22 and the outer plastic layer 24 are made of High Density Polyethylene (HDPE), which has advantages of acid and alkali resistance, organic solvent resistance, excellent electrical insulation, and capability of maintaining a certain toughness at low temperature. In addition, the reinforcement layer 23 is a steel belt, a steel wire, a steel curtain belt or a non-metal reinforcement belt, and the non-metal reinforcement belt may be glass fiber, terylene or aramid fiber.

As shown in fig. 7 to 13, in another embodiment of the present invention, the corrugated protection layer 10 includes a polyester film layer 14 located between the corrosion protection layer 12 and the plastic outer protection layer 13, and the polyester film layer 14 is wound on the outer side of the corrosion protection layer 12. The polyester film layer 14 is used for wrapping the anti-corrosion layer 12, and is further favorable for being combined with the plastic outer protection layer 13.

In a preferred embodiment of the invention, as shown in fig. 7 to 13, the outer side of the plastic outer layer 24 is provided with a sliding layer 26 to enable the corrugated protective layer 10 to move axially relative to the core tube 20. The sliding layer 26 may be a wire, a thin strip or a thin film. The main function of the sliding layer 26 is to allow a certain relative displacement between the core tube 20 and the corrugated outer protective layer 10, and to prevent stress or direct friction damage during coiling, uncoiling or flexible laying of the pipe.

As shown in fig. 9 and 10, in one embodiment, the core tube 20 includes a wear layer 25 located inside the plastic inner layer 22. The material of the wear-resistant layer 25 may be nylon, and the wear-resistant layer 25 may be bonded to the inner surface of the plastic inner layer 22 by an adhesive.

As shown in fig. 11 to 13, in a preferred embodiment of the present invention, the inner plastic layer 22 is a first inner plastic layer 221, a barrier layer 222 and a second inner plastic layer 223 sequentially from inside to outside, the inner and outer sides of the barrier layer 222 are respectively adhered to the first inner plastic layer 221 and the second inner plastic layer 223 by an adhesive 224, wherein the first inner plastic layer 221, the second inner plastic layer 223 and the outer plastic layer 24 are preferably made of high density polyethylene. The barrier layer 222 is a material capable of blocking, for example, hydrogen or other small molecule substances, and prevents the small molecule substances from penetrating through gaps between the high density polyethylene molecules to corrode the outer side.

Further, in the present invention, the outer contour shape of the corrugated protection layer 10 may be a ring-shaped corrugation or a spiral corrugation, and in the embodiment of the outer contour shape of the corrugated protection layer 10 shown in fig. 14 to 18, the outer contour shape of the corrugated protection layer 10 may be a corrugation in which the peak and the valley are circular arc shapes and the peak and the valley are connected by a straight line segment (see fig. 14), a folded corrugation in which the inflection point is a circular arc shape (see fig. 15), a corrugation in which the peak and the valley are semicircular shapes and the peak and the valley are connected by a vertical straight line segment (see fig. 16), a rectangular corrugation in which the inflection point is a circular arc shape (see fig. 17), a trapezoidal corrugation in which the inflection point is a circular arc shape or a corrugation in which the peak is a circular arc shape and the valley is connected by a straight line segment (see fig. 18).

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical concept scope of the present invention, it can be right to perform various simple modifications to the technical solution of the present invention, including combining each specific technical feature in any suitable manner, in order to avoid unnecessary repetition, the present invention does not describe separately various possible combinations. However, these simple modifications and combinations should also be considered as disclosed in the present invention, and all fall within the scope of protection of the present invention.

Claims (10)

1. The coilable pipe is characterized by comprising a core pipe (20) with a medium flow channel with a uniform section and a corrugated protection layer (10) sleeved on the outer side of the core pipe (20), wherein the outer surface of the core pipe (20) is attached to the minimum inner diameter of the corrugated protection layer (10), and the corrugated protection layer (10) at least comprises a metal corrugated protection layer (11), an anti-corrosion layer (12) and a plastic outer protection layer (13) which are arranged from inside to outside.

2. Coilable tubing according to claim 1, wherein the core tube (20) is a pure plastic core tube (21).

3. Coilable tubing according to claim 1, wherein the corrugated protective layer (10) comprises a polyester film layer (14) between the corrosion protection layer (12) and the plastic outer protective layer (13), the polyester film layer (14) being wound on the outside of the corrosion protection layer (12).

4. Coilable tubing according to claim 1, wherein the core tube (20) comprises, from inside to outside, an inner layer (22) of plastic, a reinforcing layer (23) and an outer layer (24) of plastic, wherein the reinforcing layer (23) is wound around the outer side of the inner layer (22) of plastic.

5. The coilable tubing according to claim 4, wherein the core tube (20) comprises a wear layer (25) inside the inner plastic layer (22) and/or wherein the inner plastic layer (22) and the outer plastic layer (24) are both of high density polyethylene.

6. The coilable tube according to claim 5, wherein the wear layer (25) is of nylon and the wear layer (25) is bonded to the inner surface of the plastic inner layer (22) by an adhesive.

7. The coilable tube as claimed in claim 4, wherein the inner plastic layer (22) comprises a first inner plastic layer (221), a barrier layer (222) and a second inner plastic layer (223) from inside to outside, the barrier layer (222) is bonded to the first inner plastic layer (221) and the second inner plastic layer (223) through an adhesive (224), and the first inner plastic layer (221), the second inner plastic layer (223) and the outer plastic layer (24) are all made of high-density polyethylene.

8. The coilable tube according to any one of claims 4 to 7, wherein the outer plastic layer (24) is provided with a sliding layer (26) on the outside to enable the corrugated protective layer (10) to move axially relative to the core tube (20).

9. The coilable tubing of claim 1, comprising an energy transmission device (30) located between the core tube (20) and the corrugated protective layer (10) and arranged axially along the outer surface of the core tube (20).

10. Coilable tubing according to claim 1, wherein an insulation layer is provided between the corrosion protection layer (12) and the plastic outer protection layer (13) and/or an insulation layer is provided between the core tube (20) and the corrugated protection layer (10).

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