Novel high-reliability permanent underground photoelectric composite load-bearing detection logging cable

Abstract

The utility model relates to the technical field of logging cables, in particular to a novel high-reliability permanent underground photoelectric composite load-bearing detection logging cable, which overcomes the defects of logging cables in the prior art and comprises an outer protective layer, a steel wire layer is arranged in the outer protective layer, an inner protective layer is arranged in the steel wire layer, and the inner protective layer is arranged in the outer protective layer. A plurality of bearing pieces are arranged in the center of the inner protective layer, a first conductive piece and a second conductive piece are evenly distributed in the inner protective layer, a first transmission piece and a second transmission piece are distributed between the first conductive piece and the second conductive piece, and the cable has the advantages of being high in practicability and bearing capacity and good in transmission effect.

Description

Technical Field

[0001] This utility model relates to the field of logging cable technology, specifically a novel high-reliability permanent downhole photoelectric composite load-bearing logging cable. Background Technology

[0002] Traditional products do not take into account the actual usage scenarios of fiber optic units under stress during manufacturing. Once the fiber optic unit elongates, it will cause signal attenuation or fiber core breakage. This patented cable adopts a multi-layer structure design, combining a central steel strand with an outer single-layer steel wire armor layer to bear the load. This solves the problem of sufficient protection after the fiber optic unit elongates under stress, and solves the problems of signal attenuation and fiber core breakage. Due to the high downhole pressure, there are many small gaps between the outer armor steel wires of traditional cables. High-pressure gas can leak out of the wellhead through the gaps, which is difficult to seal and cannot meet the requirements of pressurized operation, resulting in frequent wellhead leakage. This patent uses a smooth tubular sheath layer with a consistent outer diameter to effectively match the wellhead flow control pipe. It is connected by a steel sealing ferrule, which is both easy to operate and ensures sufficient wellhead sealing pressure.

[0003] Therefore, it is essential to design a new type of highly reliable, permanent downhole photoelectric composite load-bearing detection logging cable that is practical, has a strong load-bearing capacity, and good transmission performance. Utility Model Content

[0004] The purpose of this invention is to provide a new type of high-reliability permanent downhole photoelectric composite load-bearing detection logging cable to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel high-reliability permanent downhole photoelectric composite load-bearing detection logging cable, comprising an outer sheath, a steel wire layer inside the outer sheath, an inner sheath inside the steel wire layer, a plurality of load-bearing components at the center of the inner sheath, and conductive component one and conductive component two evenly distributed inside the inner sheath, with transmission component one and transmission component two distributed between conductive component one and conductive component two.

[0006] According to the above technical solution, the load-bearing component is a load-bearing steel strand, which is composed of 37 strands of 72A high-carbon steel zinc-aluminum wire. The strength and diameter of the steel wire are designed separately according to the load-bearing capacity requirements of the cable. The load-bearing steel strand should be covered with a plastic layer.

[0007] According to the above technical solution, the first conductive component and the second conductive component are copper wire core units, wherein the copper wire core unit is composed of tin-plated or silver-plated copper conductors, fluoroplastic insulation, and a 304 or 316L stainless steel layer, and the number of cores can be distinguished as 2 to 10 cores.

[0008] According to the above technical solution, the first and second transmission components are optical fiber units, wherein the optical fiber units are a combination of single-mode and multi-mode, encased in 304 or 316L stainless steel, and filled with hydrogen-absorbing grease, and the number of cores can be up to 14.

[0009] According to the above technical solution, the outer protective layer is a stainless steel pipe sheath, and the inner protective layer is a plastic inner sheath.

[0010] According to the above technical solution, the multiple copper wire core units and multiple optical fiber units are evenly distributed and tightly twisted together around the load-bearing steel strand. The twisted optoelectronic composite cable core is tightly extruded with a plastic inner sheath layer, and the plastic inner sheath fills the gap to form a whole.

[0011] According to the above technical solution, the steel wire layer consists of armored steel wires evenly distributed on the extruded plastic sheath layer.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0013] (1) Through multi-layer structure design, the load-bearing mode of the combination of central steel strand and external single-layer steel wire armor layer is used to solve the problem of sufficient protection after the fiber unit is stretched under stress, and solve the problems of signal attenuation and fiber core breakage. The smooth tubular sheath layer is adopted, and the outer diameter is consistent and can be effectively matched with the wellhead flow blocking pipe. It is connected by a steel sealing ferrule, which is easy to operate and can ensure sufficient wellhead sealing pressure. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0015] In the diagram: 1. Conductive component one; 2. Transmission component one; 3. Conductive component two; 4. Transmission component two; 5. Bearing component; 6. Inner protective layer; 7. Steel wire layer; 8. Outer protective layer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1This utility model provides a technical solution: a novel high-reliability permanent downhole photoelectric composite load-bearing detection logging cable, comprising an outer sheath 8, a steel wire layer 7 inside the outer sheath, an inner sheath 6 inside the steel wire layer 7, a plurality of load-bearing components 5 at the center of the inner sheath 6, conductive components 1 and 3 evenly distributed inside the inner sheath 6, and transmission components 2 and 4 distributed between conductive components 1 and 3. The load-bearing components 5 are load-bearing steel strands, wherein the load-bearing steel strands 5 are composed of 37 strands of 72A high-carbon steel zinc-aluminum steel wires, the strength and diameter of the steel wires are individually designed according to the load-bearing capacity requirements of the cable, and the load-bearing steel strands are extruded with a plastic layer. The conductive components 1 and 3 are copper wire core units, wherein the copper wire core units... Composed of tin- or silver-plated copper conductors, fluoroplastic insulation, and a 304 or 316L stainless steel layer, the fiber optic cable cores range from 2 to 10 cores. Transmission component 1 (2) and transmission component 2 (4) are fiber optic units, which are combinations of single-mode and multi-mode fiber optic units. They are encased in 304 or 316L stainless steel and filled with hydrogen-absorbing grease, and range from 2 to 14 cores. The outer sheath 8 is a stainless steel tube sheath, and the inner sheath 6 is a plastic inner sheath. Multiple copper core units and multiple fiber optic units are evenly distributed and tightly twisted together around the load-bearing steel strand. The twisted fiber optic composite cable core is then tightly extruded with a plastic inner sheath. The plastic inner sheath 6 fills the gaps to form a whole. The steel wire layer 7 consists of armored steel wires evenly distributed on the extruded plastic sheath.

[0018] Specifically, a multi-layer structural design is adopted, combining the central load-bearing component 5 with the outer single-layer steel wire layer 7 to ensure adequate protection of the transmission components and fiber optic units after elongation under stress, and to solve the problems of signal attenuation and fiber core breakage. The copper core in the cable is the core component, undertaking the important task of transmitting electrical energy or signals. The copper core has excellent conductivity, low resistance, good ductility, corrosion resistance, high safety, and low cost. The overall cable structure is stable and the transmission effect is good. The load-bearing steel strand 5 is a steel product made of multiple steel wires twisted together, with high strength, corrosion resistance, heat resistance, and wear resistance. Traditional cables have many small gaps between the outer steel wire layers 7, which allow high-pressure gas to leak out of the wellhead, making it difficult to seal and failing to meet the requirements of pressurized operation, resulting in frequent wellhead leakage. This patent adopts a smooth tubular sheath layer with a consistent outer diameter, which can effectively match the wellhead flow-blocking pipe. It is connected by a steel sealing ferrule, which is easy to operate and ensures sufficient wellhead sealing pressure. The plastic extrusion layer increases structural stability.

[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel high-reliability permanent downhole photoelectric composite load-bearing detection logging cable, comprising an outer sheath (8), characterized in that: The outer protective layer is provided with a steel wire layer (7), the steel wire layer (7) is provided with an inner protective layer (6), the inner protective layer (6) is provided with a number of bearing members (5) at its center, the inner protective layer (6) is provided with conductive member one (1) and conductive member two (3) evenly distributed inside, and the conductive member one (1) and conductive member two (3) are provided with transmission member one (2) and transmission member two (4) distributed between the conductive member one (1) and conductive member two (3).

2. The novel high-reliability permanent downhole photoelectric composite load-bearing detection logging cable according to claim 1, characterized in that: The load-bearing component (5) is a load-bearing steel strand, wherein the load-bearing component (5) is composed of 37 strands of 72A high carbon steel zinc-aluminum steel wires. The strength and diameter of the steel wires are designed separately according to the load-bearing capacity requirements of the cable. The load-bearing steel strand should be covered with a plastic layer.

3. The novel high-reliability permanent downhole photoelectric composite load-bearing detection logging cable according to claim 2, characterized in that: The first conductive element (1) and the second conductive element (3) are copper wire core units, wherein the copper wire core unit is composed of tin-plated or silver-plated copper conductors, fluoroplastic insulation and 304 or 316L stainless steel layers, and the number of cores is distinguished from 2 to 10.

4. The novel high-reliability permanent downhole photoelectric composite load-bearing detection logging cable according to claim 3, characterized in that: The first transmission component (2) and the second transmission component (4) are optical fiber units, wherein the optical fiber units are a combination of single-mode and multi-mode, encased in 304 or 316L stainless steel, and filled with hydrogen-absorbing grease, and the number of cores is distinguished from 2 to 14.

5. The novel high-reliability permanent downhole photoelectric composite load-bearing detection logging cable according to claim 4, characterized in that: The outer protective layer (8) is a stainless steel pipe sheath, and the inner protective layer (6) is a plastic inner sheath.

6. The novel high-reliability permanent downhole photoelectric composite load-bearing detection logging cable according to claim 5, characterized in that: Multiple copper wire core units and multiple optical fiber units are evenly distributed and tightly twisted together around the load-bearing steel strand. The twisted optoelectronic composite cable core is tightly extruded with a plastic inner sheath layer, and the inner sheath layer (6) fills the gap to form a whole.

7. The novel high-reliability permanent downhole photoelectric composite load-bearing detection logging cable according to claim 1, characterized in that: The steel wire layer (7) consists of armor steel wires evenly distributed on the extruded plastic sheath layer.

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