Steel pipe cable and rubber cable connecting device

Abstract

This utility model discloses a connection device for steel pipe cables and rubber cables. It includes: a rubber cable connector with three evenly distributed rubber cable through holes for three rubber cables to pass through; a steel pipe cable connector with a central steel pipe cable through hole; a protective shell with an internal cavity for accommodating the connection between the rubber cable and the steel pipe cable, the two ends of the protective shell being connected to the rubber cable connector and the steel pipe cable connector respectively; an O-ring receiving groove disposed on the inner wall below the rubber cable through hole; an O-ring and a washer stacked within the O-ring receiving groove; and an injection hole penetrating the rubber cable connector. The beneficial effects of this utility model are: by incorporating the rubber cable connector, steel pipe cable connector, and protective shell, it enables normal operation of electric heating technology in oil wells while ensuring good electrical performance of the cable.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe cable and rubber cable connection technology, and in particular to a steel pipe cable and rubber cable connection device. Background Technology

[0002] Heavy oil fields possess enormous resource potential, accounting for a significant proportion of global oil and gas resources. Utilizing various heavy oil thermal recovery technologies to maximize the extraction of heavy oil and high-pour-point oil is a crucial issue for the petroleum industry. Heavy oil is characterized by high gum and asphaltenes content, resulting in high viscosity, but its viscosity is extremely sensitive to temperature; increasing temperature causes a sharp decrease in viscosity. Electric heating technology for heavy oil is suitable for oil fields with poor steam injection efficiency and is one of the key technologies currently being developed for heavy oil thermal recovery. Currently, commonly used electric heating methods both domestically and internationally include: THOR electric heating technology, which has limited heating temperature due to the limitations of the motor itself, with a maximum temperature of only 120℃; microwave heating technology, which has low operating voltage and limited heating power, and its large equipment size makes it unsuitable for field applications; electromagnetic heating technology, which requires extremely high power supply stability and cannot be applied in field environments; and resistance heating technology, which has strong versatility and can be applied in various situations, but considering temperature resistance, it typically uses steel pipes and cables, which do not meet the safety requirements of offshore oil wells.

[0003] By conducting research on the connection technology between steel pipe cables and rubber cables, it is possible to distribute different types of cables at different locations within the wellbore. For example, steel pipe cables can be run in the horizontal section, offering advantages such as high-power heating and high temperature resistance; rubber cables can be run in the vertical section, providing advantages for the staged crossing of downhole packers and wellhead cables. This technology can be applied to offshore oilfield wells, providing a new development method for offshore heavy oil resources.

[0004] Therefore, there is a need for a connection technology between steel pipe cables and rubber cables, which can achieve efficient connection between steel pipe cables and rubber cables and can work normally in the well bottom environment, promote the application of electric heating technology in oilfield production, and lay the technical foundation for large-scale thermal recovery development of heavy oil fields. Utility Model Content

[0005] The purpose of this utility model is to provide a connection device for steel pipe cable and rubber cable, which is equipped with a rubber cable joint, a steel pipe cable joint and a protective shell, enabling the electric heating technology to be used normally in oil wells and ensuring good electrical performance of the cable.

[0006] To achieve the above objectives, the present invention adopts the following technical solution, including:

[0007] A rubber cable connector has three rubber cable passage holes evenly distributed on it for three rubber cables to pass through respectively.

[0008] A steel pipe cable joint, with a steel pipe cable passage hole in the center for the steel pipe cable to pass through;

[0009] A protective housing has an internal cavity for accommodating the connection between the rubber cable and the steel pipe cable, and both ends of the protective housing are respectively connected to the rubber cable joint and the steel pipe cable joint.

[0010] An O-ring receiving groove is provided on the inner wall of the lower part of the rubber cable through hole;

[0011] O-rings and washers are stacked in the O-ring receiving groove to improve the sealing performance between the rubber cable and the rubber cable joint.

[0012] The injection hole is provided through the rubber cable connector and is used to inject sealant into the protective shell to achieve secondary sealing.

[0013] Preferably, two sets of O-rings and washers are provided in the O-ring receiving groove.

[0014] Preferably, there are two injection holes, which are eccentrically arranged on the rubber cable connector.

[0015] Preferably, an internal thread is provided on the upper inner circumference of the rubber cable through hole; a hollow pressure cap is sleeved on the outer circumference of the rubber cable, and an extension portion adapted to the upper inner circumference of the rubber cable through hole is provided at the lower end of the hollow pressure cap, and an external thread adapted to the internal thread is provided on the extension portion.

[0016] Preferably, the screw is located at the upper end of the glue injection hole and is threadedly connected to the glue injection hole.

[0017] Preferably, the protective outer shell is welded to the rubber cable connector and the steel pipe cable connector at both ends, respectively, and the steel pipe cable connector is welded to the outer armor of the steel pipe cable.

[0018] The beneficial effects of this utility model are: it is equipped with a rubber cable joint, a steel pipe cable joint and a protective shell, which enables the electric heating technology to be used normally in oil wells and ensures good electrical performance of the cable. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of a steel pipe cable and rubber cable connection device according to the present invention.

[0020] Figure 2 This is a top view of a steel pipe cable and rubber cable connection device according to the present invention. Detailed Implementation

[0021] The utility model will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0022] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0023] like Figure 1-2 As shown, the present invention provides a steel pipe cable and rubber cable connection device 1, comprising:

[0024] A rubber cable connector 110 has three rubber cable through holes 111 evenly distributed on it for three rubber cables to pass through respectively.

[0025] The steel pipe cable joint 120 has a steel pipe cable passage hole 121 in the center for the steel pipe cable to pass through;

[0026] The protective housing 130 has an internal cavity 131 for accommodating the connection between the rubber cable and the steel pipe cable. The two ends of the protective housing 130 are respectively connected to the rubber cable connector 110 and the steel pipe cable connector 120.

[0027] An O-ring receiving groove is provided on the inner wall of the lower part of the rubber cable through hole;

[0028] O-rings 113 and gaskets 114 are stacked in the O-ring receiving groove to improve the sealing performance between the rubber cable and the rubber cable joint.

[0029] The injection hole 115 is disposed through the rubber cable connector 110 and is used to inject sealant into the protective shell 130 to achieve secondary sealing.

[0030] During use, first, the three rubber cables are passed through the rubber cable through hole 111 and the steel pipe cable is passed through the steel pipe cable through hole 121 respectively; then, the front end of the steel pipe cable is passed through the protective shell 130, and the rubber cable and the steel pipe cable are electrically connected; then, the steel pipe cable joint 120 is welded to the outer armor of the steel pipe cable, and then both ends of the protective shell 130 are welded to the rubber cable joint 110 and the steel pipe cable joint 120 respectively.

[0031] In another embodiment, two sets of O-rings 113 and washers 114 are provided in the O-ring receiving groove.

[0032] In another embodiment, there are two injection holes 115, which are eccentrically disposed on the rubber cable connector.

[0033] In another embodiment, an internal thread is provided on the upper inner circumference of the rubber cable through hole 111; a hollow pressure cap 117 is provided on the outer circumference of the rubber cable, and an extension portion adapted to the upper inner circumference of the rubber cable through hole 111 is provided at the lower end of the hollow pressure cap 117, and an external thread adapted to the internal thread is provided on the extension portion.

[0034] In another embodiment, a screw 116 is disposed at the upper end of the glue injection hole 115 and is threadedly connected to the glue injection hole 115.

[0035] In another embodiment, the protective housing 130 is welded to the rubber cable connector 110 and the steel pipe cable connector 120 at both ends, and the steel pipe cable connector 120 is welded to the outer armor of the steel pipe cable.

[0036] In summary, the present invention provides a steel pipe cable and rubber cable connection device 1, which includes a rubber cable joint 110, a steel pipe cable joint 120, and a protective shell 130. It enables the electric heating technology to operate normally in oil wells and ensures good electrical performance of the cable.

[0037] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A connection device for steel pipe cable and rubber cable, characterized in that, include: A rubber cable connector has three rubber cable passage holes evenly distributed on it for three rubber cables to pass through respectively. A steel pipe cable joint, with a steel pipe cable passage hole in the center for the steel pipe cable to pass through; A protective housing has an internal cavity for accommodating the connection between the rubber cable and the steel pipe cable, and both ends of the protective housing are respectively connected to the rubber cable joint and the steel pipe cable joint. An O-ring receiving groove is provided on the inner wall of the lower part of the rubber cable through hole; O-rings and washers are stacked in the O-ring receiving groove to improve the sealing performance between the rubber cable and the rubber cable joint. The injection hole is provided through the rubber cable connector and is used to inject sealant into the protective shell to achieve secondary sealing.

2. The steel pipe cable and rubber cable connection device according to claim 1, characterized in that: Two sets of O-rings and washers are provided in the O-ring receiving groove.

3. The steel pipe cable and rubber cable connection device according to claim 1 or 2, characterized in that: There are two injection holes, which are eccentrically located on the rubber cable connector.

4. The steel pipe cable and rubber cable connection device according to claim 1, characterized in that: An internal thread is provided on the upper inner circumference of the rubber cable through hole; a hollow pressure cap is fitted on the outer circumference of the rubber cable, and an extension portion adapted to the upper inner circumference of the rubber cable through hole is provided at the lower end of the hollow pressure cap, and an external thread adapted to the internal thread is provided on the extension portion.

5. The steel pipe cable and rubber cable connection device according to claim 1, characterized in that: The screw is located at the upper end of the glue injection hole and is threadedly connected to the glue injection hole.

6. The steel pipe cable and rubber cable connection device according to claim 1, characterized in that: The protective outer shell is welded to the rubber cable connector and the steel pipe cable connector at both ends, respectively, and the steel pipe cable connector is welded to the outer armor of the steel pipe cable.

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