Steel wire armored cable for electric submersible pump unit

Abstract

The utility model discloses a steel wire armored cable for an electric submersible pump unit, which comprises an outer sheath and an inner armored steel wire, the inner armored steel wire is sleeved at the center position in the outer sheath, a plurality of groups of outer armored steel wires are annularly distributed on the outer wall of the inner armored steel wire, three groups of inner sheaths are annularly distributed in the inner armored steel wire, and the outer sheath is sleeved on the inner sheath. The gap between the inner armored steel wire and the inner sheath is filled with an extruded layer, a copper conductor is sleeved in the inner sheath, and the gap between the inner sheath and the copper conductor is filled with an insulating layer. According to the steel wire armored cable for the electric submersible pump unit, through the design of the outer sheath, the performance of the cable during wellhead sealing treatment and winch winding is optimized through the design of the outer sheath and the inner sheath, and the elongation of the cable in a stress state is effectively reduced, so that the operation reliability and safety of an electric submersible pump are improved; the problems that the sealing treatment of a wellhead is poor, a cable is prone to damage or excessive stretching, and the elongation of the cable is large are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel wire armored cables, in particular to a steel wire armored cable for a submersible electric pump unit. Background Art

[0002] Submersible electric pump units are equipment used to extract crude oil from underground oil wells. The core part is an electric pump that can operate underwater for a long time. This unit is powered by cables, which not only transmit electricity but also bear the weight of the suspended electric pump and can freely lower or lift the electric pump to the ground. Steel wire armored cables play a key role in this. Their structural design must not only ensure the safe and reliable transmission of electricity, but also have sufficient mechanical strength to withstand the extreme environment and physical loads deep in the oil well.

[0003] At present, there are some defects in the steel wire armored cables for submersible electric pump units on the market. First, the sealing treatment at the wellhead is not convenient enough, which brings certain difficulties to downhole operations; secondly, when used by the ground winch, there are problems with the winding treatment of the cable under stress, which makes the cable prone to damage or over-stretching, thus affecting its service life and safety; thirdly, the large elongation of the cable under stress affects the precise operation of the submersible electric pump and reduces the operating efficiency. The existence of these defects is mainly due to the lack of comprehensive consideration of the cable design in terms of structural strength, flexibility and environmental tolerance, which makes it impossible to fully meet the high standards of oilfield operations in actual operation. This not only increases maintenance costs, but also brings potential safety risks to the normal production of oil fields.

[0004] Therefore, there is an urgent need for a steel wire armored cable for a submersible electric pump unit to solve the technical defects proposed in the above-mentioned technology. Utility Model Content

[0005] The utility model aims to provide a steel wire armored cable for a submersible electric pump unit to solve the problems of poor sealing treatment at the wellhead, easy damage or over-stretching of the cable, and large elongation of the cable proposed in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel wire armored cable for a submersible electric pump unit, comprising an outer sheath and an inner armor steel wire, the inner armor steel wire is sleeved at the center position of the outer sheath, a plurality of groups of outer armor steel wires are annularly distributed on the outer wall of the inner armor steel wire, three groups of inner sheaths are annularly distributed inside the inner armor steel wire, the gap between the inner armor steel wire and the inner sheath is partially filled with an extruded layer, a copper conductor is sleeved inside the inner sheath, and the gap between the inner sheath and the copper conductor is filled with an insulating layer.

[0007] Preferably, the inner sheaths are provided in three groups in total, and the three groups of inner sheaths form an equilateral triangle structure inside the inner armor steel wire.

[0008] Preferably, the outer sheath and the inner armor steel wire form a concentric circle structure.

[0009] Preferably, the copper conductor is a conductor made of oxygen-free copper wire material.

[0010] Preferably, the inner sheath is made of PP material and has a maximum outer diameter of 17 mm.

[0011] Preferably, the outer sheath is made of high-density polyethylene material and has a thickness of 2.0 mm.

[0012] Preferably, the outer diameters of the outer armor steel wire and the inner armor steel wire are 2.0 mm.

[0013] Preferably, the insulating layer is a composite insulating material, and the average insulation thickness is 0.8 mm.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the steel wire armored cable for the submersible electric pump unit not only optimizes the performance of the cable during wellhead sealing and winch winding, effectively reduces the elongation of the cable under stress, improves the reliability and safety of the submersible electric pump operation, reduces the risk of operation interruption and equipment loss due to cable breakage, but also reduces the frequency of maintenance and replacement, and protects the cable from damage by chemical substances;

[0015] (1) The cable has multifunctionality and high adaptability by providing an outer sheath, an inner sheath, an outer armor steel wire, an inner armor steel wire, an extruded layer, an insulating layer and a copper conductor. The copper conductor is wrapped with an insulating layer to ensure the safety of power transmission. The extruded layer as a protective layer further enhances the mechanical strength of the cable. The inner armor steel wire and the outer armor steel wire are superimposed to provide extremely strong breaking force and protection to adapt to the complex environment in the oil well. The design of the outer sheath and the inner sheath optimizes the performance of the cable during wellhead sealing and winch winding, effectively reducing the elongation of the cable under stress, thereby improving the reliability and safety of the submersible electric pump operation and solving the problems of large cable loss and short service life in harsh environments.

[0016] (2) The cable is designed with outer armor wire and inner armor wire in mind, taking into account the high breaking force requirements during the operation of the submersible pump. The high strength of the outer armor wire and inner armor wire enables the cable to have a breaking force of 166 kN, which not only ensures the safety and reliability of the cable when transmitting electricity, but also enables the cable to bear the suspension and transportation of the submersible pump. It can maintain stability even in deep well operations, greatly reducing the risk of operation interruption and equipment loss caused by cable breakage.

[0017] (3) The durability of the cable mainly comes from its high-quality material selection and structural design by providing an outer sheath and an inner sheath. Therefore, three groups of inner sheaths are arranged in a circular pattern inside the outer sheath. The multiple protective layers around the copper conductor reduce friction and damage when the cable is lowered or removed from the oil well casing, effectively extending the service life of the cable, reducing the frequency of maintenance and replacement, and saving a lot of costs for the oil field company. At the same time, the excellent corrosion resistance of the material protects the cable from damage by chemical substances, further improving the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the expansion of the insulation layer of the utility model;

[0020] Figure 3 It is a schematic diagram of the layered structure of the utility model;

[0021] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the inner sheath of the utility model.

[0022] In the figure: 1. Outer sheath; 2. Inner sheath; 3. Outer armor steel wire; 4. Inner armor steel wire; 5. Extruded layer; 6. Insulation layer; 7. Copper conductor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1: Please refer to Figure 1-4 A steel wire armored cable for a submersible electric pump unit, comprising an outer sheath 1 and an inner armor steel wire 4, wherein the inner armor steel wire 4 is sleeved at the center of the outer sheath 1, a plurality of groups of outer armor steel wires 3 are distributed in an annular manner on the outer wall of the inner armor steel wire 4, three groups of inner sheaths 2 are distributed in an annular manner inside the inner armor steel wire 4, a gap between the inner armor steel wire 4 and the inner sheath 2 is partially filled with an extruded layer 5, a copper conductor 7 is sleeved inside the inner sheath 2, an insulating layer 6 is filled in the gap between the inner sheath 2 and the copper conductor 7, and a total of three groups of inner sheaths 2 are provided;

[0025] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the steel wire armored cable includes an outer sheath 1, an inner sheath 2, an outer armor steel wire 3, an inner armor steel wire 4, an extruded layer 5, an insulating layer 6 and a copper conductor 7, which realizes the versatility and high adaptability of the cable. The copper conductor 7 is wrapped by the insulating layer 6 to ensure the safety of power transmission. The extruded layer 5 as a protective layer further enhances the mechanical strength of the cable; the inner armor steel wire 4 and the outer armor steel wire 3 are superimposed to provide extremely strong breaking force and protection to adapt to the complex environment in the oil well. The design of the outer sheath 1 and the inner sheath 2 optimizes the performance of the cable during wellhead sealing and winch winding.

[0026] Embodiment 2: The outer diameter of the outer armor steel wire 3 and the inner armor steel wire 4 is 2.0 mm, the insulating layer 6 is a composite insulating material, and the average insulation thickness is 0.8 mm;

[0027] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the design of the cable takes into special consideration the high requirement for breaking force during the operation of the submersible electric pump. The high strength of the outer armor wire 3 and the inner armor wire 4 enables the breaking force of the cable to reach 166 kN, which not only ensures the safety and reliability of the cable when transmitting electricity, but also enables the cable to undertake the suspension and transportation of the submersible electric pump and maintain stability even in deep well operations.

[0028] Embodiment 3: Three groups of inner sheaths 2 form an equilateral triangle structure in the inner armor steel wire 4, the outer sheath 1 and the inner armor steel wire 4 form a concentric circle structure, the copper conductor 7 is a conductor made of oxygen-free copper wire material, the inner sheath 2 is a sheath made of PP material, the maximum outer diameter is 17mm, and the outer sheath 1 is a sheath made of high-density polyethylene material, with a thickness of 2.0mm;

[0029] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the durability of the cable mainly comes from its high-quality material selection and structural design. Therefore, three groups of inner sheaths 2 are arranged in a ring inside the outer sheath 1. The multiple protective layers around the copper conductor 7 reduce friction and damage when the cable is lowered or pulled out of the oil well casing, effectively extending the service life of the cable, reducing the frequency of maintenance and replacement, and saving a lot of costs for the oil field company.

[0030] Working principle: The steel wire armored cable includes an outer sheath 1, an inner sheath 2, an outer armor steel wire 3, an inner armor steel wire 4, an extruded layer 5, an insulating layer 6 and a copper conductor 7, which realizes the versatility and high adaptability of the cable. The copper conductor 7 is wrapped by the insulating layer 6 to ensure the safety of power transmission. The extruded layer 5 as a protective layer further enhances the mechanical strength of the cable; the inner armor steel wire 4 and the outer armor steel wire 3 are superimposed to provide extremely strong breaking force and protection to adapt to the complex environment in the oil well. The design of the outer sheath 1 and the inner sheath 2 optimizes the performance of the cable during wellhead sealing and winch winding. The design of the cable especially considers the pulling force during the operation of the submersible electric pump. The high breaking force requirement of the cable and the high strength of the outer armor steel wire 3 and the inner armor steel wire 4 can make the breaking force of the cable reach 166kN, which not only ensures the safety and reliability of the cable in transmitting electricity, but also enables the cable to undertake the suspension and transportation of submersible electric pumps, and maintain stability even in deep well operations. The durability of the cable mainly comes from its high-quality material selection and structural design. Therefore, three groups of inner sheaths 2 are arranged in an annular manner inside the outer sheath 1. The multiple protective layers around the copper conductor 7 reduce friction and damage when the cable is lowered or removed from the oil well casing, effectively extending the service life of the cable and reducing the frequency of maintenance and replacement.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A steel wire armored cable for a submersible electric pump unit, comprising an outer sheath (1) and inner armored steel wires (4), characterized in that: An inner armor steel wire (4) is sleeved at the center of the outer sheath (1); multiple groups of outer armor steel wires (3) are distributed in an annular manner on the outer wall of the inner armor steel wire (4); three groups of inner sheaths (2) are distributed in an annular manner inside the inner armor steel wire (4); the gap between the inner armor steel wire (4) and the inner sheath (2) is partially filled with an extruded layer (5); a copper conductor (7) is sleeved inside the inner sheath (2); and the gap between the inner sheath (2) and the copper conductor (7) is filled with an insulating layer (6).

2. The steel wire armored cable for a submersible electric pump unit according to claim 1, characterized in that: The inner sheaths (2) are provided in three groups in total, and the three groups of inner sheaths (2) form an equilateral triangle structure inside the inner armor steel wire (4).

3. The steel wire armored cable for a submersible electric pump unit according to claim 1, characterized in that: The outer sheath (1) and the inner armor steel wire (4) form a concentric circle structure.

4. The steel wire armored cable for a submersible electric pump unit according to claim 1, characterized in that: The copper conductor (7) is a conductor made of oxygen-free copper wire material.

5. The steel wire armored cable for a submersible electric pump unit according to claim 1, characterized in that: The inner sheath (2) is a sheath made of PP material, and has a maximum outer diameter of 17 mm.

6. The steel wire armored cable for a submersible electric pump unit according to claim 1, characterized in that: The outer sheath (1) is made of high-density polyethylene material and has a thickness of 2.0 mm.

7. The steel wire armored cable for a submersible electric pump unit according to claim 1, characterized in that: The outer diameters of the outer armor steel wire (3) and the inner armor steel wire (4) are 2.0 mm.

8. The steel wire armored cable for a submersible electric pump unit according to claim 1, characterized in that: The insulating layer (6) is a composite insulating material, and the average insulation thickness is 0.8 mm.

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