CN210986270U

CN210986270U - Underground television system

Info

Publication number: CN210986270U
Application number: CN201922486421.0U
Authority: CN
Inventors: 高忠献; 王尧; 宋火轮; 强双虎; 殷海军; 翁国鹏; 唐敬; 钱进; 王凌云; 孙瑞训; 赵利庆; 赵甜
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-10
Anticipated expiration: 2029-12-31

Abstract

The utility model provides a TV system in pit belongs to borehole operation technical field. The underground television system comprises a wire reel, a photoelectric composite cable, an optical fiber transceiver receiving end, a video terminal, a video front end and wireless transmission equipment, wherein the photoelectric composite cable is wound on the wire reel, one end of the photoelectric composite cable is connected with the optical fiber transceiver receiving end, the optical fiber transceiver receiving end is connected with the video terminal through the wireless transmission equipment, the other end of the photoelectric composite cable is connected with the video front end, the video front end comprises a shell, an optical fiber transceiver transmitting end, a camera and a lighting circuit, the photoelectric composite cable is connected with the optical fiber transceiver transmitting end, and the optical fiber transceiver transmitting end is connected with the camera. The scene that the camera was shot is transmitted the optic fibre transceiver receiving terminal by optic fibre transceiver transmitting terminal through the photoelectric composite cable, is provided the video terminal by wireless transmission equipment and plays, adopts the optical cable transmission signal, and anti-interference is strong, can clearly look over the trouble condition in the well, does benefit to the maintenance and formulates reasonable operation measure.

Description

Underground television system

Technical Field

The disclosure relates to the technical field of downhole operation, in particular to a downhole television system.

Background

In the oilfield operation, the casing or oil pipe in the oil-water well often has the faults of deformation, damage and the like, and the production stop of the oil-water well can be caused by the faults.

In order to enable the oil-water well to be normally produced, after the casing or the oil pipe breaks down, maintenance operation is required to eliminate the fault, so that the operation cost of an enterprise is increased.

Because the casing and the oil pipe are deep into the ground, the deformation and damage conditions of the casing or the oil pipe are difficult to determine, and the fault occurrence depth is difficult to accurately determine, the maintenance and the reasonable operation measures are not facilitated, so that the same fault is prevented from happening again or the fault is prevented from further worsening.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides an underground television system, which can be convenient for checking the fault condition in an oil-water well and is beneficial to maintenance and formulation of reasonable operation measures. The technical scheme is as follows:

the embodiment of the disclosure provides a downhole television system, which comprises a wire reel, a photoelectric composite cable, an optical fiber transceiver receiving end, a video terminal, a video front end and a wireless transmission device, wherein the photoelectric composite cable is wound on the wire reel, an optical cable at one end of the photoelectric composite cable is connected with the optical fiber transceiver receiving end, the optical fiber transceiver receiving end is connected with the wireless transmission device, the wireless transmission device is wirelessly connected with the video terminal, the other end of the photoelectric composite cable is connected with the video front end, the video front end comprises a shell, an optical fiber transceiver sending end, a camera and an illumination circuit, the shell is cylindrical, the optical fiber transceiver sending end, the camera and the illumination circuit are sequentially arranged in the shell along the axis of the shell, and the lens of the camera is coaxial with the shell, one end of the photoelectric composite cable is positioned in the shell and connected with the shell, the cables of the photoelectric composite cable are respectively connected with the sending end of the optical fiber transceiver, the camera and the lighting circuit, the optical cable of the photoelectric composite cable is connected with the sending end of the optical fiber transceiver, and the sending end of the optical fiber transceiver is connected with the camera.

Optionally, the wire spool includes a bracket, a shaft disc, a spool, and a locking pin, the optical/electrical composite cable is wound around the spool, the shaft disc is coaxially connected to an end of the spool, the spool is rotatably mounted on the bracket, a plurality of insertion holes are circumferentially distributed on the shaft disc, the bracket is provided with a pin hole, and the locking pin is detachably inserted into the pin hole and the insertion hole aligned with the pin hole.

Optionally, the casing includes tube-shape body, protecgulum and hou gai, the coaxial connection of dismantling of back lid is in the one end of tube-shape body, the coaxial connection of dismantling of protecgulum is in the other end of tube-shape body, install transparent goggles on the protecgulum.

Optionally, one end of the front cover, which is far away from the cylindrical body, is provided with a limiting inner flange, the transparent goggles are mounted on one side, which is close to the cylindrical body, of the limiting inner flange, and the transparent goggles are in sealing fit with the inner wall of the front cover.

Optionally, a first sealing ring is clamped between the transparent goggles and the inner side wall of the front cover, the front cover is sleeved outside the cylindrical body, a second sealing ring is clamped between the other end of the cylindrical body and the transparent goggles, and a third sealing ring is clamped between the outer side wall of the cylindrical body and the inner side wall of the front cover.

Optionally, the photoelectric composite cable is sleeved with a waterproof joint, the rear cover is provided with a through hole, the waterproof joint is fixed in the through hole, and an epoxy resin adhesive is filled in a joint between the waterproof joint and the through hole in the rear cover.

Optionally, the video front end further includes a power regulator, the power regulator is located in the housing, a cable of the photoelectric composite cable is connected to the power regulator, and the sending end of the optical fiber transceiver, the camera, and the lighting circuit are respectively connected to the power regulator.

Optionally, the lighting circuit comprises a plurality of lights spaced circumferentially along the lens of the camera.

Optionally, scales are distributed on the outer surface of the photoelectric composite cable.

Optionally, the video front end further includes a storage battery, and the storage battery is connected to the cable of the optical-electrical composite cable and the wireless transmission device.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:

through setting up the wire reel, the compound cable of photoelectricity, the optical fiber transceiver receiving terminal, wireless transmission equipment, video terminal and video front end, the compound cable of photoelectricity is around establishing can make things convenient for receiving and releasing of compound cable of photoelectricity on the wire reel, through being connected the optical cable of the one end of the compound cable of photoelectricity with the optical fiber transceiver receiving terminal, be connected optical fiber transceiver receiving terminal and wireless transmission equipment, wireless transmission equipment and video terminal wireless connection, be connected the other end and the video front end of the compound cable of photoelectricity for can put the video front end down in the well, shoot scene in the pit by the video front end. Because the video front end includes casing, optic fibre transceiver transmitting terminal, camera and lighting circuit, the casing can provide the protection to optic fibre transceiver transmitting terminal, camera and lighting circuit, and lighting circuit can provide the illumination, is favorable to the camera to shoot clear picture in the pit. The cable in the photoelectric composite cable can supply power for the video front end, the scene that the camera was shot can be transmitted to optical fiber transceiver receiving terminal and wireless transmission equipment by optical fiber transceiver sending end via the optical cable in the photoelectric composite cable, provide video terminal through radio signal by wireless transmission equipment, broadcast by video terminal, adopt optical cable transmission signal, anti-interference is strong, thereby can be clear look over the trouble condition in the profit well, do benefit to the maintenance and formulate reasonable operation measure, adopt radio signal not receive space restriction, be convenient for actual operation and many people to share.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a downhole television system provided by an embodiment of the present disclosure;

fig. 2 is a schematic partial structure diagram of a downhole television system according to an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a downhole television system according to an embodiment of the present disclosure. As shown in fig. 1, the downhole tv system includes a wire reel 10, an optical composite cable 20, a fiber transceiver receiving end 30, a video terminal 40, a video front end 50, and a wireless transmission device 60.

Fig. 2 is a schematic partial structure diagram of a downhole television system according to an embodiment of the present disclosure. As shown in fig. 2, video front end 50 includes a housing 500, a fiber optic transceiver launch end 510, a camera 520, and an illumination circuit 530. The housing 500 has a cylindrical shape, and the optical fiber transceiver transmitting end 510, the camera 520, and the illumination circuit 530 are sequentially arranged in the housing 500 along the axis of the housing 500. The lens of the camera 520 is coaxial with the housing 500, one end of the photoelectric composite cable 20 is located in the housing 500 and connected with the housing 500, the cable 22 of the photoelectric composite cable 20 is respectively connected with the optical fiber transceiver transmitting end 510, the camera 520 and the lighting circuit 530, the optical cable 21 of the photoelectric composite cable 20 is connected with the optical fiber transceiver transmitting end 510, and the optical fiber transceiver transmitting end 510 is connected with the camera 520.

The photoelectric composite cable 20 is wound on the wire spool 10, the optical cable 21 at one end of the photoelectric composite cable 20 is connected with the optical fiber transceiver receiving end 30, the optical fiber transceiver receiving end 30 is connected with the wireless transmission device 60, the wireless transmission device 60 is wirelessly connected with the video terminal 40, and the other end of the photoelectric composite cable 20 is connected with the video front end 50.

Optionally, the camera 520 may be a network camera, the network camera may be directly connected to a network, the video signal is output through an ethernet and is communicated with the optical fiber transceiver transmitting end 510, and the imaging definition is high, which is beneficial to improving the definition of the shot picture.

Illustratively, the camera 520 may be a high-definition low-light camera that can obtain color images in both day and night vision environments.

The diameter of camera 520 may be less than 57 mm. Limited by the diameter of the well bore of the oil and water well, the housing 500 is smaller in diameter, and a camera 520 having a diameter less than 57mm is employed to better fit the housing 500 for ease of installation into the housing 500.

Optionally, the lighting circuit 530 may include a plurality of lighting lamps 531 distributed at intervals along the circumferential direction of the lens of the camera 520, and by arranging the plurality of lighting lamps 531 along the circumferential direction of the lens of the camera 520, the brightness of the underground may be improved, and it is beneficial to avoid generating shadows to affect shooting, so that the shot pictures are clearer. A condensing lens can be arranged in front of the illuminating lamps 531, so that light emitted by the illuminating lamps 531 is more concentrated, and the illuminating effect is improved.

The illuminating lamp 531 can be a white light emitting diode, the light emitting diode has high brightness and low energy consumption, not only can the shot picture be clearer, but also the energy consumption can be reduced.

A plurality of illuminating lamps 531 can be connected in parallel, so that when part of the illuminating lamps 531 are damaged, other illuminating lamps 531 can still work normally. Each light 531 can be connected in series with a protective resistor, and the protective resistor can play a role in voltage division and current limitation, so that the light 531 can be protected, and the condition that the light 531 is burnt out due to overhigh voltage or current is prevented.

As shown in fig. 2, the housing 500 may include a cylindrical body 501, a front cover 502, and a rear cover 503. The rear cover 503 is coaxially detachably connected to one end of the cylindrical body 501, the front cover 502 is coaxially detachably connected to the other end of the cylindrical body 501, and the transparent goggles 540 are mounted on the front cover 502. By providing the housing 500 as three detachable parts, assembly and maintenance of the video front end 50 can be facilitated. The transparent goggles 540 may provide protection to the structures inside the housing 500 while ensuring that the illumination light 531 illuminates normally.

The cylindrical body 501 can be in threaded connection with the front cover 502 and the rear cover 503, and the threaded connection is convenient to disassemble and not easy to leak.

The cylindrical body 501, the front cover 502 and the rear cover 503 can be stainless steel structures, so that the corrosion resistance of the shell 500 is improved, and the service life of the shell 500 is prolonged.

As shown in fig. 2, a first sealing ring 551 may be interposed between the transparent goggles 540 and the inner sidewall of the front cover 502, and the front cover 502 is sleeved outside the cylindrical body 501. One end of the cylindrical body 501 is connected to the rear cover 503, a second seal 552 may be interposed between the other end of the cylindrical body 501 and the transparent goggles 540, and a third seal 553 may be interposed between the outer wall of the cylindrical body 501 and the inner wall of the front cover 502. The first seal 551 may seal a gap between the transparent shield glasses 540 and the inner sidewall of the front cover 502, and after the front cover 502 is screwed onto the cylindrical body 501, the other end of the cylindrical body 501 and the transparent shield glasses 540 clamp the second seal 552 to seal the gap between the cylindrical body 501 and the transparent shield glasses 540, and the third seal 553 may seal a gap between the front cover 502 and the cylindrical body 501. By means of the three sealing rings, liquid in the well can be prevented from penetrating into the video front end 50.

A fourth seal 554 may be interposed between the tubular body 501 and the rear cover 503 to seal a gap between the rear cover 503 and the tubular body 501, thereby preventing liquid in the well from penetrating into the video front end 50. The rear cover 503 may have a through hole 503a to facilitate connection of the optical composite cable 20.

As shown in fig. 2, a waterproof joint 24 may be sleeved outside the optical/electrical composite cable 20, the waterproof joint 24 is fixed in the through hole 503a, and an epoxy resin glue 25 may be filled in a seam between the waterproof joint 24 and the through hole 503a in the rear cover 503. By arranging the waterproof joints 24 and filling the joints with epoxy resin glue 25, the sealing performance can be improved, and liquid in the well is prevented from permeating into the video front end 50.

As shown in fig. 2, video front end 50 may also include a power regulator 550. The power regulator 550 is located in the housing 500, the cable 22 of the optical/electrical composite cable 20 is connected to the power regulator 550, and the fiber transceiver transmitting end 510, the camera 520 and the lighting circuit 530 are respectively connected to the power regulator 550. The voltage can be stabilized at a proper value by setting the power regulator 550, so as to ensure that the fiber transceiver transmitting end 510, the camera 520 and the lighting circuit 530 work normally. For example, the power regulator 550 may output a voltage of 12V stably.

The optical fiber transceiver transmitting end 510 with voltage regulation function can also be directly connected with the cable 22 of the optical-electrical composite cable 20.

The optical fiber transceiver comprises an optical fiber transceiver transmitting end 510 and an optical fiber transceiver receiving end 30, and the transmission bandwidth of the optical fiber transceiver can be not less than 100M, so as to ensure a better data transmission effect.

The input interface of the optical fiber transceiver transmitting end 510 is an ethernet interface and is connected to the camera 520, and the output interface of the optical fiber transceiver transmitting end 510 is an optical fiber interface and is connected to the optical cable 21 of the optical-electrical composite cable 20. The diameter of the fiber optic transceiver transmitting end 510 may be less than 50mm to facilitate installation in the housing 500.

Alternatively, the video terminal 40 may be a portable terminal, for example, the video front end 50 may be a portable computer, and the video front end 50 may communicate with the wireless transmission device 60 through a wireless signal, so that the use is more convenient.

The wireless transmission device 60 may be, but is not limited to, a wireless router, bluetooth, infrared transmission device.

The portable computer may be installed with video monitoring software, and the video images may be analyzed and displayed by the video monitoring software to record and capture the images at the bottom of the well, and at the same time, an IP (internet protocol) address of the camera 520, a storage path, a storage format, an image style, and the like of the video files or the photo files obtained by the shooting may be set, and the camera 520 may be controlled. The video monitoring software may be various, and in this embodiment, the video monitoring software is a CMS (Central Management Server).

The input interface of the optical fiber transceiver receiving end 30 is an optical fiber interface, which is connected to the optical cable 21 of the optical-electrical composite cable 20, and the output interface of the optical fiber transceiver receiving end 30 is an ethernet interface, which is connected to the wireless transmission device 60. Illustratively, the RJ45 interface of the wireless transmission device 60 may interface with the RJ45 interface of the fiber optic transceiver receiving end 30 via an 8-wire network cable. Both the fiber optic transceiver receiving end 30 and the wireless transmission device 60 may be mounted on the spool 10 to save space.

As shown in fig. 1, the wire spool 10 may include a bracket 11, a spool 12, a spool 13, and a locking pin 14. The optical/electrical composite cable 20 may be wound around a spool 13, with a hub 12 coaxially attached to an end of the spool 13, and the spool 13 rotatably mounted on the bracket 11. A plurality of insertion holes 12a are circumferentially distributed on the shaft disc 12, pin holes 11a are formed in the support 11, and the locking pins 14 are detachably inserted into the pin holes 11a and the insertion holes 12a aligned with the pin holes 11 a. After removing the locking pin 14, the opto-electric composite cable 20 can be stored by rotating the spool 13 to store the video front end 50, and after adjusting the video front end 50 to a proper position, the locking pin 14 can be inserted into the pin hole 11a and one of the insertion holes 12a currently aligned with the pin hole 11a to lock the spool 13 to maintain the video front end 50 at a certain depth.

The hub 12 or spool 13 may also provide space for installation, for example, as shown in FIG. 1, the fiber optic transceiver receiving end 30 and the wireless transmission device 60 may both be mounted on the hub 12 or within the spool 13.

Optionally, the downhole tv system may further include a battery 70, the battery 70 is connected to the cable 22 of the optical/electrical composite cable 20, and the battery 70 may supply power to the video front end 50 and the wireless transmission device 60. The battery 70 may also be mounted on the hub 12 or within the spool 13.

Illustratively, the output voltage of the battery 70 may be not lower than 12V, the maximum output current may be not lower than 3A, and the storage capacity may be not lower than 10Ah, so as to meet the working requirement of the downhole television system. In the present embodiment, the output voltage of the battery 70 is 24V.

The power regulator 550 can stabilize the voltage at a suitable value to ensure that the fiber transceiver transmitter 510, the camera 520, and the lighting circuit 530 operate properly. For example, the power regulator 550 may output a voltage of 12V stably.

Optionally, scales may be distributed on the outer surface of the optical/electrical composite cable 20. In this way, when the composite optical cable 20 is received and released through the spool 13, the depth position of the video front end 50 can be known by the scale on the outer surface of the composite optical cable 20.

The composite optical/electrical cable 20 typically includes a sheath 23 and load-bearing steel wires (not shown) in addition to the electrical cable 22 and the optical cable 21. The cable 22, cable 21 and load-bearing steel wires are located within the sheath 23. The scale may be provided on the outer skin 23. The sheath 23 can provide protection, and the bearing steel wire can bear main tensile force, so that the cable 22 and the optical cable 21 are prevented from being damaged.

For example, the graduation may have a division value of 0.5m, i.e. one graduation is provided on the outer skin 23 every 0.5 m. The scale may be initiated at the connection of the opto-electronic composite cable 20 to the video front end 50 so that the depth of the video front end 50 can be easily known.

Taking the downhole tv system shown in fig. 1 and 2 as an example, when looking at the downhole situation, the locking pin 14 can be first removed from the insertion hole 12a and the pin hole 11a, the spool 13 of the reel 10 is rotated, the optical electrical composite cable 20 is released, and the optical electrical composite cable 20 is unfolded and extended in the downhole direction to lower the video front end 50. The video terminal 40 communicates with the wireless transmission device 60 through a wireless signal to monitor the downhole situation in real time, and when it is determined from the monitoring screen that the target position is reached, the locking pin 14 is inserted into the pin hole 11a and the insertion hole 12a currently aligned with the pin hole 11a, and the spool 13 is locked. The observation position, i.e., the depth of the fault occurrence, is determined by the scale on the photoelectric composite cable 20. Video recording may also be performed by video terminal 40. After that, the locking pin 14 is taken out again, the spool 13 of the wire spool 10 is rotated, the optical electrical composite cable 20 is recovered, the optical electrical composite cable 20 is wound on the spool 13, the video front end 50 is collected, and finally the locking pin 14 is inserted into the pin hole 11a and the insertion hole 12a currently aligned with the pin hole 11a to prevent the optical electrical composite cable 20 from being scattered.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A downhole television system is characterized by comprising a wire reel (10), a photoelectric composite cable (20), an optical fiber transceiver receiving end (30), a video terminal (40), a video front end (50) and a wireless transmission device (60), wherein the photoelectric composite cable (20) is wound on the wire reel (10), an optical cable (21) at one end of the photoelectric composite cable (20) is connected with the optical fiber transceiver receiving end (30), the optical fiber transceiver receiving end (30) is connected with the wireless transmission device (60), the wireless transmission device (60) is wirelessly connected with the video terminal (40), the other end of the photoelectric composite cable (20) is connected with the video front end (50), the video front end (50) comprises a shell (500), an optical fiber transceiver sending end (510), a camera (520) and an illumination circuit (530), the shell (500) is cylindrical, the optical fiber transceiver transmitting end (510), the camera (520) and the lighting circuit (530) are sequentially arranged in the shell (500) along the axis of the shell (500), the lens of the camera (520) is coaxial with the shell (500), one end of the photoelectric composite cable (20) is located in the shell (500) and connected with the shell (500), the cable (22) of the photoelectric composite cable (20) is respectively connected with the optical fiber transceiver transmitting end (510), the camera (520) and the lighting circuit (530), the optical cable (21) of the photoelectric composite cable (20) is connected with the optical fiber transceiver transmitting end (510), and the optical fiber transceiver transmitting end (510) is connected with the camera (520).

2. A downhole television system according to claim 1, wherein the wire spool (10) comprises a bracket (11), a shaft disc (12), a wire shaft (13) and a locking pin (14), the optical-electrical composite cable (20) is wound on the wire shaft (13), the shaft disc (12) is coaxially connected to the end of the wire shaft (13), the wire shaft (13) is rotatably mounted on the bracket (11), a plurality of insertion holes (12a) are circumferentially distributed on the shaft disc (12), pin holes (11a) are arranged on the bracket (11), and the locking pin (14) is detachably inserted into the pin holes (11a) and the insertion holes (12a) aligned with the pin holes (11 a).

3. A downhole television system according to claim 1, wherein the housing (500) comprises a cylindrical body (501), a front cover (502) and a rear cover (503), the rear cover (503) is coaxially detachably connected to one end of the cylindrical body (501), the front cover (502) is coaxially detachably connected to the other end of the cylindrical body (501), and a transparent goggles (540) are mounted on the front cover (502).

4. A downhole television system according to claim 3, wherein an end of the front cover (502) remote from the cylindrical body (501) is provided with a limit inner flange (5021), the transparent goggles (540) are mounted on a side of the limit inner flange (5021) close to the cylindrical body (501), and the transparent goggles (540) are in sealing fit with an inner wall of the front cover (502).

5. A downhole television system according to claim 4, wherein a first sealing ring (551) is sandwiched between the transparent goggles (540) and an inner side wall of the front cover (502), the front cover (502) is sleeved outside the cylindrical body (501), a second sealing ring (552) is sandwiched between the other end of the cylindrical body (501) and the transparent goggles (540), and a third sealing ring (553) is sandwiched between an outer side wall of the cylindrical body (501) and the inner side wall of the front cover (502).

6. The downhole television system according to claim 3, wherein a waterproof connector (24) is sleeved outside the photoelectric composite cable (20), a through hole (503a) is formed in the rear cover (503), the waterproof connector (24) is fixed in the through hole (503a), and an epoxy resin glue (25) is filled at a joint between the waterproof connector (24) and the through hole (503a) in the rear cover (503).

7. The downhole television system according to any of claims 1 to 6, wherein the video front end (50) further comprises a power regulator (550), the power regulator (550) is located in the housing (500), the cable (22) of the optical-electrical composite cable (20) is connected to the power regulator (550), and the fiber transceiver transmitting end (510), the camera (520) and the lighting circuit (530) are respectively connected to the power regulator (550).

8. A downhole television system according to any of claims 1-6, wherein the illumination circuit (530) comprises a plurality of illumination lamps (531) circumferentially spaced along the lens of the camera (520).

9. A downhole television system according to any of claims 1 to 6, wherein the outer surface of the opto-electronic composite cable (20) is provided with graduations.

10. A downhole television system according to any of claims 1 to 6, further comprising a battery (70), wherein the battery (70) is connected with the cable (22) of the optical/electrical composite cable (20) and the wireless transmission device (60).