CN215928603U - Seismic source device for optical fiber excitation of oil and gas pipeline - Google Patents

Abstract

The utility model provides a seismic source device for optical fiber excitation of an oil and gas pipeline. The power supply is electrically connected with the vibrator, the controller is electrically connected with the vibrator or is connected with the vibrator through a wireless signal, the vibration frequency and the vibration strength of the vibrator can be controlled, and the vibrator is attached to and connected with the plate. The beneficial effects of the utility model can include: the method can be used for oil and gas pipeline optical cable excitation, and has no potential safety hazard; the portable vibrator is convenient to carry, and energy is supplied to the vibrator in the field, so that the portable vibrator is suitable for various complex terrains for pipeline embedment; the source energy and vibration frequency are adjustable and can be used for different excitation schemes.

Description

Seismic source device for optical fiber excitation of oil and gas pipeline

Technical Field

The utility model relates to the field of seismic source excitation devices of oil and gas pipelines, in particular to a seismic source device for optical fiber excitation of an oil and gas pipeline.

Background

Pipeline transportation is an economic and efficient transportation mode, and bears an important mission in the field of oil and gas storage and transportation, and pipeline safety detection is an important link in pipeline transportation, and if a pipeline breaks and oil and gas leakage occurs, not only can resource waste and environmental pollution be caused, but also more importantly, great threat can be brought to personal safety.

At present, the conventional pipeline safety monitoring technology mainly comprises an optical fiber sensing technology and a seismic wave detection technology, and the application cost of the seismic wave detection technology is high, so that the seismic wave detection technology is not suitable for long-term monitoring of long-distance pipelines, and the optical fiber sensing technology has great application and development potential in the aspect of pipeline safety monitoring.

Before a perfect pipeline safety monitoring system is established, the position and the state of the pipeline parallel optical cable must be accurately grasped, and the optical fiber is generally excited in a mode of manually exciting shock waves, so that the position of the pipeline bound with the optical cable is searched. At present, the optical fiber is generally excited in a mode of manually exciting shock waves, and then the position of the pipeline bound with the optical cable is found. However, due to the particularity and sensitivity of oil pipelines, explosive excitation cannot be used near oil and gas pipelines; the general large-scale vehicle-mounted seismic source device and the maneuvering equipment cannot pass through complex terrains buried in pipelines such as mountainous regions, rivers, tunnels and the like; the manual heavy hammer excitation has higher labor cost, low efficiency and potential safety hazard.

The Chinese patent with publication number CN110702212A discloses an oil and gas pipeline optical fiber calibration method combining a fixed seismic source device and a phi-OTDR sensing system. The fixed seismic source device can control the excitation energy intensity to be consistent based on the hammering signal generated by the free falling body at the same scale position, but can not change the frequency, and can not solve the filtering problem when the frequency of the noise signal is close to the frequency of the effective signal.

Therefore, an appropriate adjustable frequency range is needed to change the excitation energy intensity of the seismic source excitation device.

SUMMERY OF THE UTILITY MODEL

The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, a shock wave excitation device is provided that can be used for oil and gas pipeline cable excitation. For another example, the problem that the existing large-scale vehicle-mounted seismic source device and the existing mobile equipment cannot pass through the complex terrains buried in mountainous regions, rivers, tunnels and other pipelines is solved. For another example, an adjustable frequency range is provided to alter the excitation energy level of the seismic source excitation device.

In order to achieve the aim, the utility model provides a seismic source device for optical fiber excitation of an oil and gas pipeline, which comprises a vibrator, a power supply, a controller and a plate. The power supply is electrically connected with the vibrator, the controller is electrically connected with the vibrator or is connected with the vibrator through a wireless signal, the vibration frequency and the vibration strength of the vibrator can be controlled, and the vibrator is attached to and connected with the plate.

Further, the thickness of plate is 20 ~ 60 mm.

Further, the length of plate is 200 ~ 400mm, and the width is 100 ~ 300 mm.

Further, the plate is a steel plate.

Further, the surface of the plate is plated with a wear-resistant layer.

Further, the plate is a steel plate which is 300mm long, 200mm wide and 20mm thick and is plated with an anti-wear layer on the surface.

Compared with the prior art, the beneficial effects of the utility model can include: the method can be used for oil and gas pipeline optical cable excitation, and has no potential safety hazard; the device is portable, the labor of workers is reduced, and the device can be buried in complex terrains through pipelines such as mountains, rivers, tunnels and the like; different from the traditional seismic source, the vibration energy can not be controlled by light energy, and the frequency can also be controlled.

Drawings

FIG. 1 shows a schematic diagram of a seismic source apparatus for fiber optic excitation of oil and gas pipelines in an exemplary embodiment of the utility model.

The labels in the figure are:

1-vibrator, 2-fixing piece, 3-connecting piece, 4-plate, 5-power supply and 6-controller.

Detailed Description

Hereinafter, the seismic source device for oil and gas pipeline optical fiber excitation of the present invention will be described in detail with reference to exemplary embodiments.

In the description of the present application, it is to be understood that the terms, "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In an exemplary embodiment of the utility model, as shown in fig. 1, the seismic source device for optical fiber excitation of oil and gas pipelines comprises a vibrator 1, a plate 4, a power supply 5 and a controller 6.

The power supply 5 is electrically connected to the vibrator 1 to supply electric power to the vibrator 1. The power source may be a battery, such as a dc battery, to facilitate the operator to carry the power source 5 through the buried complex terrain in mountainous regions, rivers, tunnels, etc.

The controller 6 is electrically connected with the vibrator 1 or wirelessly connected with the vibrator 1, and the controller 6 can control the frequency of vibration and the intensity of vibration (i.e. the source energy) of the vibrator 1 through the electrical connection or the wireless connection, for example, a frequency setting module and an intensity setting module are provided on the controller 6 to realize that the source energy and the vibration frequency can be adjusted, so as to execute different excitation schemes according to different requirements of site construction.

The utility model can provide the vibration source capable of adjusting the vibration frequency and the vibration intensity, can solve the filtering problem when the frequency of the noise signal is close to the frequency of the effective signal, improves the positioning precision of the optical cable, and has good application prospect in the aspects of accurate positioning of the optical cable and early warning of optical cable disasters. Meanwhile, the adjustable frequency and amplitude enable the device to adapt to different working environments, the working intensity of field workers can be greatly reduced in complex mountain terrains, the working efficiency is improved, and meanwhile good signal excitation data can be obtained.

Further, the frequency setting module may be a digital panel, and the vibration intensity setting module may be a knob.

The vibrator 1 is attached to the plate 4. Further, the vibrator is provided with the handle with the plate junction, the handle uses wear-resisting material to make, for example, the handle can be wear-resisting rope to the operating personnel carries the device.

In use, the device of the utility model is placed at the excitation point and the vibrator 1 is brought into sufficient coupling with the ground, i.e. the side of the plate 4 not in contact with the vibrator 1 is brought into sufficient contact with the ground. For example, a vibrator-sized pit is dug at the excitation point location, the vibrator is placed in the pit and filled with earth, and the seismic source is guaranteed to be sufficiently coupled with the earth. The vibrator 1 is started by setting the vibration frequency and the operating voltage, for example, by setting the vibration parameters to 30Hz and 12V using a control panel, and the seismic source device is activated to start the seismic source. Since the vibrator 1 and the plate 4 are connected, the vibration of the vibrator 1 can be transmitted to the plate 4, and thus the vibration energy can be transmitted to the optical cable through the ground.

Further, the plate 4 is a plate such as a steel plate, a copper plate, or an iron plate, which can receive vibration of the vibrator and transmit the vibration to the ground.

Further, the thickness of the plate 4 is 20-60 mm, for example, the thickness of the plate 4 is 20mm, 30mm, 40mm or 50mm, so as to ensure that vibration energy is not lost on the plate. The plate member 4 is, for example, a steel plate having a thickness of 20 mm.

Further, the length of the plate 4 is 200-400 mm, and the width is 100-300 mm, for example, the length of the plate is 300mm, and the width of the plate is 200mm, so as to ensure that the contact area of the plate and the ground is sufficient. For example, the plate 4 is a steel plate 200mm wide, 300mm long, and 20 to 60mm thick.

Further, the plate 4 is coated with an anti-wear layer to protect the plate 4, so that the device can be reused many times. For example, the plate 4 is a steel plate with a 200mm width, a 300mm length and a 20mm thickness, and is coated with a wear-resistant layer.

Further, as shown in fig. 1, the device may further include a fixing member 2. The fixing member 2 fastens the vibrator 1 to the panel 4. For example, the fixing member is tightly attached to the vibrator and fixed to the plate 4 through the connecting member, thereby fastening the vibrator 1 to the plate 4 and ensuring that vibration energy is transmitted to the maximum extent through the vibrator, the plate and the ground. The connecting piece can be detachable through screws, bolts and the like, so that the device is convenient to carry. Further, the fixing member 2 has a cavity with a downward opening, and the cavity can accommodate and clamp the vibrator so that the vibrator is further tightly attached to the panel. Still further, the cavity of the mount has a shape that matches the outer surface of the vibrator to better transmit the vibrations of the vibrator to the plate 4.

In summary, the beneficial effects of the utility model can include:

(1) the method can be used for oil and gas pipeline optical cable excitation, and has no potential safety hazard;

(2) the portable vibrator is convenient to carry, and energy is supplied to the vibrator in the field, so that the portable vibrator is suitable for various complex terrains for pipeline embedment;

(3) the source energy and vibration frequency are adjustable and can be used for different excitation schemes.

Although the present invention has been described above in connection with the exemplary embodiments and the accompanying drawings, it will be apparent to those of ordinary skill in the art that various modifications may be made to the above-described embodiments without departing from the spirit and scope of the claims.

Claims (10)

1. The seismic source device for optical fiber excitation of oil and gas pipelines is characterized by comprising a vibrator, a power supply, a controller and a plate, wherein,

the power supply is electrically connected with the vibrator;

the controller is electrically connected with the vibrator or is connected with the vibrator through a wireless signal, and can control the vibration frequency and the vibration strength of the vibrator;

the vibrator is attached to and connected with the plate.

2. The seismic source device for optical fiber excitation of oil and gas pipelines according to claim 1, wherein the thickness of the plate is 20-60 mm.

3. The seismic source device for optical fiber excitation of oil and gas pipelines according to claim 1, wherein the plate has a length of 200-400 mm and a width of 100-300 mm.

4. The seismic source apparatus for fiber optic excitation of oil and gas pipelines according to claim 1, wherein the plate is a steel plate.

5. The seismic source apparatus for fiber optic excitation of oil and gas pipelines according to claim 1, wherein the surface of the plate is coated with a wear-resistant layer.

6. The seismic source apparatus for fiber optic excitation of oil and gas pipelines according to claim 1, further comprising a fastener securing the vibrator to the plate.

7. The seismic source apparatus for fiber optic excitation of oil and gas pipelines according to claim 6, wherein the fixture has a downwardly opening cavity capable of receiving and gripping the vibrator.

8. The seismic source apparatus for fiber optic excitation of oil and gas pipelines according to claim 7, wherein the cavity of the fixture has a shape that matches the outer surface of the vibrator.

9. The seismic source apparatus for fiber optic excitation of oil and gas pipelines according to claim 6, wherein the fixing member is fastened to the plate member by a connecting member.

10. The seismic source device for optical fiber excitation of oil and gas pipelines according to claim 1, wherein a handle is arranged at the joint of the vibrator and the plate, and the handle is made of wear-resistant materials.

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