CN111350885A

CN111350885A - Cable laying pipe

Info

Publication number: CN111350885A
Application number: CN202010444805.0A
Authority: CN
Inventors: 朱华; 许兆宁; 金立群; 宿腾飞; 李仁闯
Original assignee: Shengli Oilfield Xinda Pipes Technology Development Co Ltd
Current assignee: Shengli Oilfield Xinda Pipes Technology Development Co Ltd
Priority date: 2020-05-23
Filing date: 2020-05-23
Publication date: 2020-06-30

Abstract

The invention provides a cable laying pipe, which relates to the technical field of oil gas exploitation, transportation and the like, and comprises a pipe body; the cable is embedded in the pipe wall of the pipe body. The pipe body sequentially comprises an inner liner layer for preventing corrosion and permeability, an enhancement layer for improving the radial tensile and compressive strength of the pipe body, an axial tensile layer for improving the axial tensile strength of the pipe body and an outer coating layer for protecting the outside of the pipe body from inside to outside in the direction of the thickness of the pipe body. The invention has more compact structure and convenient use, and can effectively avoid the exposure of the cable compared with the prior art, thereby being safer.

Description

Cable laying pipe

Technical Field

The invention relates to the technical field of oil and gas exploitation, transportation and the like, in particular to a cable laying pipe.

Background

At present, the cable laying pipe is a new product developed on the basis of the technology of fully-fused continuous fiber reinforced thermoplastic pipes, and the cable laying pipe is additionally arranged in the pipe structure to form an integrated pipeline and is increasingly used in the field of oil and gas development and transportation.

The existing pipeline joint can only meet the butt joint between two sections of pipelines, and a cable is often exposed outside during butt joint, so that the cable is easily abraded or corroded, the service life of the cable is influenced, and potential safety hazards exist.

Disclosure of Invention

It is an object of the present invention to provide a cable laying conduit which solves at least one of the above mentioned problems of the prior art.

In order to solve the above technical problem, the present invention provides a cable laying pipe, comprising: a pipe body; the cable is embedded in the pipe wall of the pipe body.

Further, the body includes from inside to outside in proper order in the pipe wall thickness direction:

an inner liner for corrosion protection and permeability resistance;

the reinforcing layer is used for improving the radial tensile and compressive strength of the pipe body;

the axial stretching layer is used for improving the axial tensile strength of the pipe body;

and an outer coating for protecting the outside of the pipe body.

Further, the inner liner layer is a high-density polyethylene layer or a cross-linked polyethylene layer.

Further, the enhancement layer is a glass fiber tape layer wound and coated outside the lining layer.

Furthermore, the axial stretching layer is a high-density polyethylene layer, and metal wires are embedded in the axial stretching layer. Wherein, preferably, the metal wire is a steel wire.

Wherein, the metal silk thread is laid along the axial of body, has improved the axial tensile strength of body greatly.

Further, the outer cladding layer is a high density polyethylene layer.

Further, the cable includes a signal cable embedded in the inner liner.

Further, the cable includes a power cable embedded within the axially-extending layer.

Further, the power cables comprise three groups of cables, and the three groups of cables (three power wires) are uniformly distributed in the circumferential direction of the pipe body.

Further, still include heating cable, heating cable buries in the inside lining. Wherein, the heating cable is used for heating the grease in the body, prevents that the grease from condensing when the temperature reduces and adhering to on the body inner wall, hinders the normal flow of grease, when improving grease mobility, has reduced energy consumption, has improved production efficiency.

Further, in the circumference of the pipe body, a plurality of heating cables are arranged at even intervals.

By adopting the technical scheme, the invention has the following beneficial effects:

the existing oil-submersible pump adopts a common steel oil pipe to suspend an electric pump for oil extraction, and is powered by an independent cable. Because the empty space in the pit shaft is narrow and small, the vibration of oil pipe during the operation and the friction between cable and the pit shaft when playing the well cause the cable wearing and tearing, and steel oil pipe corrosion resistance is poor simultaneously and causes the tubular column life-span short.

The cable laying pipe provided by the invention has the advantages of more compact structure and convenience in use, and can effectively prevent the cable from being exposed compared with the prior art, so that the cable laying pipe is safer.

And lay cable pipe in this application and adopt multilayer structure's nonmetal oil pipe, lay in the latent oil pump power cable through structural design and lay into the pipe wall, avoid cable wear, lay in the body simultaneously and add heat cable, signal cable and can realize the body heating, the signal transmission function, corrosion resisting property is excellent, uses safelyr.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a cable laying pipe according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a layout structure of heating cables on a circumferential ring-cut surface of a pipe body according to an embodiment of the present invention.

Reference numerals:

50-a pipe body; 51-an inner liner; 52-an enhancement layer; 53-axially stretched layer; 54-an outer cladding layer; 55-metal wire; 61-a signal cable; 62-a power cable; 63-heating the cable.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further explained with reference to specific embodiments.

As shown in fig. 1, the present embodiment provides a cable laying pipe, comprising: a tube body 50; a cable is embedded in the wall of the pipe body 50.

The tube body 50 sequentially includes from inside to outside in the tube wall thickness direction:

an inner liner 51 for corrosion prevention and permeation resistance;

a reinforcing layer 52 for increasing the radial tensile and compressive strength of the tubular body 50;

an axially stretching layer 53 for increasing the axial tensile strength of the pipe body 50;

and an outer coating 54 for protecting the exterior of the tube body 50.

Wherein the inner liner layer 51 is preferably a high density polyethylene layer or a cross-linked polyethylene layer. The reinforcing layer 52 is a glass fiber tape layer wound and coated outside the lining layer 51. The axially stretched layer 53 is a high-density polyethylene layer, and metal wires 55 are embedded in the axially stretched layer 53. Wherein, preferably, the metal wire 55 is a steel wire. Wherein, the metal silk thread 55 is laid along the axial of the tube body 50, which greatly improves the axial tensile strength of the tube body 50. And the outer cover 54 is a high density polyethylene layer.

The cable comprises a signal cable 61, a power cable 62 and a heating cable 63, wherein the signal cable 61 is embedded in the inner lining layer 51. The power cable 62 is embedded in the axial tension layer 53. The power cable 62 includes three sets of cables (three power wires) uniformly arranged in the circumferential direction of the pipe body 50. The heating cable 63 is embedded in the inner liner 51. The plurality of heating cables 63 are arranged at regular intervals in the circumferential direction of the pipe body 50. The heating cable 63 is used for heating grease in the pipe body 50, prevents the grease from condensing and adhering to the inner wall of the pipe body 50 when the temperature is reduced, and prevents the grease from flowing normally, so that the grease flowability is improved, the energy consumption is reduced, and the production efficiency is improved.

As shown in fig. 2, it is preferable that the sum of the cross sections of the heating cables 63 is arranged in an arithmetic progression with gradually increasing size in the axial direction of the pipe body 50 and from the bottom to the top, that is, the arrangement density of the heating cables 63 is higher and higher from the bottom to the top, so as to increase the heating power. The equal difference value is set according to actual needs, and is preferably set to be 0.3-2 m. The environmental temperature around the pipe body 50 from the underground to the top is generally gradually reduced, the heat required for heating the grease is gradually increased as the pipe body is closer to the ground surface, and the transitional heating and energy waste are avoided while effective heating is ensured by gradually increasing the number of the heating cables 63.

And lay the non-metallic oil pipe that the cable pipe adopted multilayer structure in this application, lay in the pipe wall with submersible pump power cable through structural design, avoid cable wear, lay heating cable 63, signal cable 61 in the body 50 simultaneously and can realize the heating of body 50, the signal transmission function, corrosion resisting property is excellent, uses safelyr.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cable laying tube, comprising: a pipe body; a cable is embedded in the pipe wall of the pipe body;

the body includes from inside to outside in proper order in the pipe wall thickness direction:

an inner liner for corrosion protection and permeability resistance;

and an outer coating for protecting the outside of the pipe body.

2. The cable laying tube of claim 1 wherein said inner liner layer is a high density polyethylene layer or a crosslinked polyethylene layer;

and/or the enhancement layer is a glass fiber tape layer wound and coated outside the lining layer.

3. The cable laying tube of claim 1, wherein said axially stretched layer is a high density polyethylene layer, and metal filaments are embedded in the axially stretched layer.

4. The cable laying tube of claim 1, wherein said outer coating layer is a high density polyethylene layer.

5. The cable applicator tube of claim 1, wherein the cable comprises a signal cable embedded within the inner liner.

6. The cable laying tube of claim 1, wherein said cable comprises a power cable embedded within said axial tensile layer.

7. The cable laying tube of claim 6, wherein said power cables comprise three sets of cables, said three sets of cables being evenly distributed around the circumference of said tube.

8. The cable laying tube of claim 1, further comprising a heating cable embedded within said inner lining.

9. The cable laying tube as claimed in claim 8, wherein a plurality of said heating cables are arranged at regular intervals in a circumferential direction of said tube body.