A ball receiving and launching device and an oil and gas pipeline inspection system

Abstract

A kind of ball receiving and transmitting device and oil and gas pipeline detection system, the ball receiving and transmitting device includes: ball barrel, including barrel, first pipe section, second pipe section and third pipe section connected in turn, wherein the inner diameter of first pipe section is greater than the inner diameter of third pipe section, the first pipe section is provided with inlet and outlet liquid port;Quick-opening blind plate, hinged to the end of first pipe section away from second pipe section, for opening and closing the opening of the end of first pipe section away from second pipe section;And slide plate, including plate body, be provided in the first pipe section, including with the first plate face of the inner peripheral surface of the first pipe section and the second plate face opposite to the first plate face;Card can, rotationally connected to the plate body.The technical problem to be solved in the present application is that the existing ball receiving and transmitting device is prone to multi-section internal detector back sliding during the process of launching multi-section internal detector, which leads to launching failure.

Description

Technical Field

[0001] This article relates to the field of oil and gas gathering and transportation pipeline integrity management, and in particular to a launcher and receiver device and an oil and gas pipeline inspection system. Background Technology

[0002] With the continuous development of oil and gas fields, the scale of oil and gas gathering and transportation pipelines is becoming increasingly large. Due to factors such as low pipeline construction standards, poor anti-corrosion coating performance, complex transported media, and harsh internal and external corrosive environments, pipelines often have numerous defects and high failure rates. To ensure pipeline safety, it is necessary to periodically inspect, evaluate, and repair pipeline defects using multi-section internal inspection devices. The multi-section internal inspection device, also known as a launcher / receiver tube, is an essential component for internal inspection as a pipeline accessory.

[0003] However, in actual launches of multiple internal detectors, the pressure of the pressurized liquid working fluid is quite high, around 1 ton. Pushing aside the already placed internal detectors can easily cause them to slip backward, preventing successful launch. This necessitates depressurization, reloading, and repressurization until successful launch, significantly increasing the workload, time, and cost of operation and maintenance, and greatly impacting the efficiency of internal detection. Furthermore, if the H2S content in the vented air exceeds the standard, personnel must wear respirators, significantly increasing the safety risks of the detection operation. On the other hand, not all pipelines on site are equipped with launcher / receiver devices. Equipping every pipeline with such devices would require substantial financial and maintenance costs, making it impractical. However, for pipelines with significant safety risks requiring internal detection, detachable launcher / receiver devices are crucial for flexible on-site implementation.

[0004] Chinese patent application number 201820227049.4 discloses a skid-mounted integrated launcher and receiver device, which is suitable for sending, recovering and transferring pigs with large volume and weight. However, since the internal detection is composed of multiple functional sections connected by universal joints, it cannot be loaded into the launcher tube by hoisting.

[0005] Chinese patent application number 202110307115.5 discloses a simple ball-receiving and receiving device that is easy to install and manufacture, and can be made using locally available materials on a construction site. However, this device requires fixed installation to a pipeline, making it impossible to achieve a convenient and economical ball-serving method that can be installed and used as needed.

[0006] Chinese utility model patent application No. 202220851821.6 discloses a rapid launch and receiver device for oil and gas pipelines, which can realize the launch and receiver function with a single device. Although the rapid launch and receiver device maintains an inclined angle with the pipeline, it cannot avoid the phenomenon of the internal monitor slipping backward due to the large pressure during stamping, which makes it impossible to launch the ball successfully. Summary of the Invention

[0007] To address the problem that existing launch and receiver devices often experience launch failures due to the backward slippage of multiple internal detectors during launch.

[0008] This application provides a ball receiving and serving device, which includes:

[0009] Ball tube, including

[0010] The cylinder consists of a first pipe section, a second pipe section, and a third pipe section connected in sequence, wherein the inner diameter of the first pipe section is larger than the inner diameter of the third pipe section, and the first pipe section is provided with an inlet and an outlet.

[0011] A quick-opening blind flange, hinged to the end of the first pipe section facing away from the second pipe section, is used to open and close the opening at the end of the first pipe section facing away from the second pipe section; and

[0012] Skateboards, including

[0013] The plate body is disposed within the first pipe section and includes a first plate surface that abuts against the inner circumferential surface of the first pipe section and a second plate surface that is opposite to the first plate surface.

[0014] The clamp is rotatably connected to the plate and can only rotate between a first position extending away from the first plate surface and a second position tilting towards the third pipe section.

[0015] An elastic element, connected to the latch, is used to apply a spring force to the latch so that the latch tends to return to the first position.

[0016] In one illustrative embodiment, the inner diameters of the first and third pipe segments are uniform, and the cross-sectional area of ​​the second pipe segment gradually decreases from the first to the third pipe segment.

[0017] In one illustrative embodiment, both the first plate surface and the second plate surface are constructed as cylindrical surfaces coaxial with the first pipe segment, and the diameter of the first plate surface is the same as the inner diameter of the first pipe segment.

[0018] In one illustrative embodiment, the plate is provided with mounting holes, and the opposite sides of the mounting are provided with first shaft holes;

[0019] The latch includes a connecting part with a second shaft hole and a latch claw extending radially outward from the edge of the connecting part along the second shaft hole.

[0020] The ball receiving and launching device also includes a rotating shaft, which passes through the second shaft hole and has its two ends extending into the two first shaft holes respectively.

[0021] In one illustrative embodiment, when the latch is in the first position, the claw abuts against the sidewall of the mounting hole facing away from the third pipe segment.

[0022] In one illustrative embodiment, the elastic element is a torsion spring, with its two ends connected to the connecting portion and the plate body, respectively.

[0023] In one illustrative embodiment, the first pipe segment and the third pipe segment are parallel to each other, and the cross-section of the third pipe segment is tangent to the projection of the cross-section of the first pipe segment onto the axial direction of the first pipe segment.

[0024] The slide plate is disposed on one side of the first pipe section near the third pipe section.

[0025] In one illustrative embodiment, the third pipe segment has an interface at the end opposite to the second pipe segment.

[0026] This invention also proposes an oil and gas pipeline inspection system, which includes:

[0027] The first ball receiving and serving device is the ball receiving and serving device as described above;

[0028] A first pressure gauge is installed on the cylinder of the first ball receiving and launching device to measure the pressure inside the cylinder;

[0029] Pressurized pipelines are used to supply liquid working fluids;

[0030] The first liquid inlet valve is connected at one end to the pressurization pipeline and at the other end to the liquid inlet and outlet of the first ball receiving and launching device.

[0031] The first ball valve is connected at one end to the opening of the third pipe section of the first ball receiving and launching device;

[0032] The first three-way valve has three ports that are respectively connected to the other end of the first ball valve, the pressurized pipeline, and the pipeline to be tested.

[0033] The second ball valve, installed on the pressurization pipeline, is used to connect and disconnect the pressurization pipeline from the pipeline under test; and

[0034] The first exhaust valve is located on the first pipe section of the first ball receiving and launching device.

[0035] In one illustrative embodiment, it includes:

[0036] The second ball receiving and serving device is the ball receiving and serving device described above;

[0037] The second pressure gauge is installed on the cylinder of the second ball receiving and launching device to measure the pressure inside the cylinder;

[0038] Discharge pipes are used to discharge liquid working fluids;

[0039] The first liquid outlet valve is connected at one end to the discharge pipe and at the other end to the inlet and outlet of the second ball receiving and launching device;

[0040] The third ball valve is connected at one end to the opening of the third pipe section of the second ball receiving and launching device;

[0041] The second three-way valve has three interfaces that are respectively connected to the other end of the second ball valve, the discharge pipe, and the pipe to be tested;

[0042] The fourth ball valve, installed on the discharge pipe, is used to connect and disconnect the discharge pipe from the pipe to be tested; and

[0043] The second exhaust valve is installed on the first pipe section of the second ball receiving and launching device;

[0044] A vent valve is located at the top of the first pipe section of the second ball receiving and launching device;

[0045] A drain valve is located at the bottom of the first pipe section of the second ball receiving and launching device;

[0046] A ball-passing indicator is installed on the third section of the second ball-receiving and receiving device to detect whether a multi-section internal detector passes through the third section.

[0047] When launching a multi-section internal detector using the aforementioned launch and receiver device, during the process of injecting liquid working fluid into the first pipe section to pressurize it, at least one cup of the multi-section internal detector is located on the side of the latch near the second pipe section. The latch can hold the cup in place to prevent the multi-section internal detector from sliding towards the quick-opening blind plate, which would prevent the multi-section internal detector from being launched. This launch and receiver device has a simple structure, few parts, and a high launch success rate.

[0048] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the solutions described in the description and the accompanying drawings. Attached Figure Description

[0049] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0050] Figure 1 This is a full sectional view of a ball receiving and launching device according to an embodiment of this application;

[0051] Figure 2 This is a partial schematic diagram of the sliding plate with the latch in the first position in an embodiment of this application;

[0052] Figure 3This is a partial schematic diagram of the sliding plate with the latch in the second position in an embodiment of this application;

[0053] Figure 4 This is a front view schematic diagram of the plate body in an embodiment of this application;

[0054] Figure 5 This is a top view of the plate in an embodiment of this application;

[0055] Figure 6 This is a three-dimensional schematic diagram of the tenon in the embodiments of this application;

[0056] Figure 7 This is a front view schematic diagram of the latch in an embodiment of this application;

[0057] Figure 8 This is a partial schematic diagram of the oil and gas pipeline detection system in an embodiment of this application;

[0058] Figure 9 This is a partial schematic diagram of the oil and gas pipeline detection system in an embodiment of this application. Detailed Implementation

[0059] like Figure 1 As shown, Figure 1 A schematic structure of a ball-receiving and receiving device 100 according to this application is shown. The ball-receiving and receiving device 100 includes a ball tube 1 and a slide plate 3. The slide plate 3 is disposed inside the ball tube 1.

[0060] The spherical tube 1 includes a cylinder body 10 and a quick-opening blind flange 2. The cylinder body 10 has a cylindrical structure. The cylinder body 10 includes a first pipe section 11, a second pipe section 12, and a third pipe section 13. The first pipe section 11, the second pipe section 12, and the third pipe section 13 are connected together in sequence, with the opposite ends of the second pipe section 12 connected to the ends of the first pipe section 11 and the second pipe section 12 that are close to each other. The first pipe section 11 and the third pipe section 13 can be constructed as cylindrical. The diameters of the first pipe section 11 and the third pipe section 13 are uniform. The diameter of the first pipe section 11 is larger than the diameter of the third pipe section 13. The second pipe section 12 has a variable diameter cylindrical structure. The inner diameter of the end of the second pipe section 12 near the first pipe section 11 is larger than the inner diameter of the end of the second pipe section 12 near the first end of the third pipe section. The cross-sectional area of ​​the internal channel of the second pipe section 12 gradually decreases from the first pipe section 11 to the third pipe section 13. Inlet and outlet ports are provided on the side wall of the first pipe section 11.

[0061] The quick-opening blind flange 2 can be constructed as a disc-shaped structure. The edge of the quick-opening blind flange 2 is hinged to the end of the first pipe segment 11 facing away from the second pipe segment 12. The quick-opening blind flange 2 can rotate to cover the opening at the end of the first pipe segment 11 facing away from the second pipe segment 12 to close the opening, and it can also rotate to separate from the opening to open it. Thus, the quick-opening blind flange 2 can open and close the opening at the end of the first pipe segment 11 facing away from the second pipe segment 12. A locking mechanism can be provided on the quick-opening blind flange 2 to lock it when closed.

[0062] like Figure 2 , 3 As shown, the slide plate 3 includes a plate body 31, a latch 32, and an elastic element (not shown in the figure). The plate body 31 is constructed as a strip plate. The length of the plate body 31 can be the same as the length of the first pipe segment 11. The plate body 31 is disposed within the first pipe segment. The plate body 31 includes a first plate surface 311 and a second plate surface 312 opposite to the first plate surface 311. The first plate surface 311 of the plate body 31 abuts against the inner circumferential surface of the first pipe segment. The latch 32 is disposed on the plate body 31. The latch 32 and the plate body 31 are rotatably connected. The latch 32 can rotate to a first position, in which the latch 32 extends from the plate body 31 in a direction away from the first plate surface 311, and the latch 32 stands upright on the plate body 31. The latch 32 can also rotate to a second position, in which the latch 32 tilts toward the side closer to the third pipe segment 13. Because the plate 31 limits the locking tenon 32, the locking tenon 32 can only rotate between the first position and the second position. An elastic element connects the locking tenon 32 and the plate 31. The elastic element can undergo torsional elastic deformation and applies a spring force to the locking tenon 32, which can make the locking tenon 32 tend to return to the first position.

[0063] When launching a multi-section internal detector using the launcher-receiver device 100, the third pipe section 13 is first connected to one end of the pipe 5 to be tested. Then, the quick-opening blind flange 2 is opened, and the sliding plate 3 is pulled out of the first pipe section 11. The multi-section internal detector is placed on the sliding plate 3. The multi-section internal detector is fitted with multiple rubber cups, at least one of which is engaged with the latch 32 on the side near the second pipe section 12. The sliding plate 3 is then pushed into the first pipe section 11. The rubber cups located in the second pipe section 12 can seal the gap between the multi-section internal detector and the second pipe section 12. At this time, the multi-section internal detector blocks the second pipe section 12. Then, the quick-opening blind flange 2 is closed, sealing the opening on the first pipe section 11. Finally, liquid working medium is injected into the inlet and outlet of the first pipe section 11 to pressurize the first pipe section 11. When the pressure in the first pipe section 11 rises to a certain level, the liquid working medium in the first pipe section 11 can push the multi-section internal detector through the second pipe section 12 and the third pipe section 13 in sequence and enter the pipe to be tested 5, thereby completing the launch.

[0064] During the process of injecting liquid working medium into the first pipe section 11 to pressurize the first pipe section 11, since at least one cup is located on the side of the latch 32 near the second pipe section 12, the latch 32 can lock the cup to prevent the multi-section internal detector from sliding to the side of the quick-opening blind plate 2, which would cause the multi-section internal detector to fail to emit.

[0065] Specifically, during the process of the liquid working fluid pushing the multi-section internal detector towards the third pipe section 13, when the cup on the side of the latch 32 facing away from the third pipe section 13 passes through the latch 32, the latch 32 can be driven by the cup to tilt towards the second pipe section 12, that is, the latch 32 rotates from the first position to the second position, and the cup can pass smoothly through the latch 32. After the cup passes through the latch 32, the latch 32 rotates from the tilted state to the upright state under the action of the elastic force applied by the elastic element, that is, the latch 32 rotates from the second position to the first position. This ensures that the multi-section internal detector can only move towards the third pipe section 13. Even if the pressure applied to the first pipe section 11 is stopped at this time, the pressure in the pipe to be tested 5 pushes the multi-section internal detector back, and the latch 32 can still hold the cup to prevent the multi-section internal detector from sliding towards the quick-opening blind flange 2.

[0066] In summary, the ball receiving and serving device 100 has a simple structure, few parts, and a high success rate in serving.

[0067] In one illustrative embodiment, such as Figure 1 , 4 As shown in Figure 5, the plate 31 is constructed as an arc-shaped plate, extending from one end of the first pipe segment 11 to the other. The cross-section of the plate 31 is a circular arc, the length of which is one-third of the circumference of the inner circumference of the first pipe segment 11. The first plate surface 311 and the second plate surface 312 of the plate 31 are both constructed as cylindrical surfaces. The first plate surface 311, the second plate surface 312, and the first pipe segment 11 are coaxially arranged. The diameter of the first plate surface 311 is equal to the inner diameter of the first pipe segment 11, that is, the outer diameter of the plate 31 is equal to the inner diameter of the first pipe segment 11, and the first plate surface 311 can fit tightly against the inner circumference of the first pipe segment 11.

[0068] The plate 31 is constructed as an arc-shaped plate, and the multi-section internal detector is set on the recessed second plate surface 312 of the plate 31, which guides the multi-section internal detector to slide only along the axial direction of the first pipe section 11. At the same time, the diameter of the second plate surface 312 of the plate 31 is the same as the inner diameter of the first pipe section 11, so the plate 31 can be installed more stably in the first pipe section 11, and the second plate 31 cannot enter the second pipe section 12.

[0069] In an illustrative embodiment, a mounting hole 313 is provided on the plate 31. The mounting hole 313 penetrates the plate 31 perpendicularly. The mounting hole 313 can be a through hole with a rectangular cross-section. The mounting hole 313 can be located at one end of the plate 31 near the second pipe segment 12. First shaft holes 314 are provided on both opposite side walls of the mounting hole 313. The axial direction of the first shaft holes 314 is perpendicular to the axial direction of the first plate surface 311 and also perpendicular to the axial direction of the first pipe segment 11. The two first shaft holes 314 are coaxially arranged.

[0070] like Figure 6 , 7 As shown, the latch 32 includes a connecting portion 321 and a latch 322. The connecting portion 321 can be constructed as a plate. The connecting portion 321 is disposed within the mounting hole 313 of the plate body 31, and the plate surface of the connecting portion 321 is perpendicular to the first shaft hole 314. A second shaft hole 3211 is provided on the connecting portion 321, and the second shaft hole 3211 penetrates the connecting portion 321. The second shaft hole 3211 is coaxially disposed with the first shaft hole 314. The latch 322 is disposed at the edge of the connecting portion 321 and extends radially outward from the edge of the connecting portion 321 along the second shaft hole 3211. The latch 322 extends outward from the second plate surface 312 of the plate body 31.

[0071] The ball receiving and launching device 100 also includes a rotating shaft (not shown in the figure). The rotating shaft passes through the second shaft hole 3211 of the connecting part 321, and both ends of the rotating shaft extend out of the second shaft hole 3211. Both ends of the rotating shaft are also inserted into the two first shaft holes 314 of the plate body 31. The rotating shaft rotatably connects the connecting part 321 and the plate body 31 together, and the connecting part 321 can rotate around the rotating shaft. When the connecting part 321 rotates, it can drive the claw 322 to rotate. When the latch 32 rotates to the first position, the claw 322 stands upright on the plate body 31, and when the multi-section inner detector slides towards the quick-opening blind plate 2, the claw 322 can lock the cup on the multi-section inner detector. When the latch 32 rotates to the second position, the claw 322 tilts towards the second tube section 12, and when the multi-section inner detector slides towards the third tube section 13, the cup of the multi-section inner detector can pass through the claw 322. One end of the elastic member is connected to the connecting part 321. The elastic member applies elastic force to the connecting part 321 so that the latch 32 tends to return to the first position.

[0072] In an illustrative embodiment, when the latch 32 is in the first position, the side of the claw 322 facing away from the third pipe segment 13 abuts against the side wall of the mounting hole 313 of the plate 31, the side wall of the mounting hole 313 being the side wall of the mounting hole 313 facing away from the third pipe segment 13.

[0073] In this way, when the latch 32 is in the first position, the claw 322 abuts against the side wall of the mounting hole 313, which can limit the latch 32 and prevent the latch 32 from continuing to rotate away from the second position.

[0074] In an illustrative embodiment, the elastic element is a torsion spring, which may be fitted onto a rotating shaft. Both ends of the elastic element are connected to the connecting portion 321 and the plate 31, respectively. The connection point of the elastic element on the connecting portion 321 is offset from the second shaft hole 3211 on the connecting portion 321. The connection point of the elastic element on the plate 31 is offset from the first shaft hole 314 on the plate 31. The elastic element is in a torsional deformation state, and the elastic force applied by the elastic element to the latch 32 can drive the latch 32 to rotate from the second position to the first position.

[0075] In one illustrative embodiment, the first pipe segment 11 and the third pipe segment 13 are parallel to each other. The first pipe segment 11 and the third pipe segment 13 are not coaxial, and the cross-section of the third pipe segment 13 is tangent to the projection of the cross-section of the first pipe segment 11 onto the axial direction of the first pipe segment 11. The slide plate 3 is disposed inside the first pipe segment 11 on the side close to the third pipe segment 13.

[0076] Since the projection of the third pipe segment 13 on the first pipe segment 11 is tangent in the axial direction, and the slide plate 3 is located inside the first pipe segment 11 on the side close to the third pipe segment 13, the multi-section internal detector slides into the third pipe segment 13 more smoothly.

[0077] In one illustrative embodiment, the third pipe segment 13 has an interface at its end opposite to the second pipe segment 12. This interface is for detachable connection to a valve. This interface can be a flange. This interface allows for quick installation and disassembly, making the ball launcher / receiver device 100 easy to install and remove.

[0078] In one illustrative embodiment, the inner diameter of the third pipe segment 13 is the same as the inner diameter of the pipe 5 to be tested.

[0079] It can ensure that when the ball receiving and launching device 100 receives and launches the multi-section internal detector, the multi-section internal detector can pass smoothly through the third pipe section 13 and the pipe to be tested 5.

[0080] This embodiment also proposes an oil and gas pipeline inspection system, which includes a first launcher / receiver device 100a and a second launcher / receiver device 100b. The structures of the first launcher / receiver device 100a and the second launcher / receiver device 100b are the same as those of the launcher / receiver device 100 described above. The first launcher / receiver device 100a is used to launch a multi-segment internal detector, and the second launcher / receiver device 100b is used to retrieve the multi-segment internal detector.

[0081] like Figure 8As shown, the oil and gas pipeline inspection system also includes a first pressure gauge 43, a pressurization pipeline 44, a first liquid inlet valve 42, a first ball valve 41, a second ball valve 45, a first vent valve 47, and a first tee 46. The first pressure gauge 43 is installed on the first pipe section 11 of the first launcher / receiver device 100a and is used to detect the pressure within the first pipe section 11 of the first launcher / receiver device 100a. The pressurization pipeline 44 is used to supply the liquid working fluid. One end of the first liquid inlet valve 42 is connected to the pressurization pipeline 44, and the other end is connected to the inlet / outlet of the first launcher / receiver device 100a. When the first liquid inlet valve 42 is open, the pressurization pipeline 44 can inject the liquid working fluid into the inlet / outlet of the first launcher / receiver device 100a to increase the pressure within the first pipe section 11 of the first launcher / receiver device 100a. The first ball valve 41 is installed at the opening of the third pipe section 13 of the first launcher / receiver device 100a and can open and close the opening of the third pipe section 13 of the first launcher / receiver device 100a. The first ball valve 41 can be an interface connected at one end to the first launcher / receiver device 100a. The other end of the first ball valve 41 is connected to an interface of the first tee 46 via a pipe, the length of which can be more than 20 meters to ensure smooth operation of the internal detection. The other two interfaces of the first tee 46 are respectively connected to one end of the pressurized pipe 44 and one end of the pipe section to be tested. The second ball valve 45 is installed on the end of the pressurized pipe 44 connected to the first tee 46, and is used to cut off and connect the pressurized pipe 44 and the first tee 46. The first vent valve 47 is installed on the first pipe section 11 of the first launcher / receiver device 100a, and is used to vent the gas inside the first launcher / receiver device 100a.

[0082] The steps involved in issuing a multi-section internal detector signal for this oil and gas pipeline inspection system include:

[0083] Step S1: When the first ball valve 41 is closed and the second ball valve 45 is open, connect the interface of the third pipe section 13 of the first ball receiving and launching device 100a to the first ball valve 41.

[0084] Step S2: Check the reading of the first pressure gauge 43. When the reading of the first pressure gauge 43 is zero, it is confirmed that the pressure inside the first ball receiving and serving device 100a is normal. When the pressure inside the first ball receiving and serving device 100a is normal, open the quick-opening blind plate 2 of the first ball receiving and serving device 100a.

[0085] Step S3: Pull the slide plate of the first ball receiving and serving device 100a out of the ball tube 1 of the first ball receiving and serving device 100a, place the multi-section inner detector on the slide plate 3, and make the latch 32 of the slide plate 3 lock at least one of the rubber cups of the multi-section inner detector.

[0086] Step S4: Push the slide plate of the first ball receiving and serving device 100a into the ball tube 1 of the first ball receiving and serving device 100a until at least one of the rubber cups of the multi-section internal detector on the slide plate abuts against the inner circumferential surface of the second tube section 12.

[0087] Step S5: Close the quick-opening blind plate 2 of the first ball receiving and launching device 100a, check the reading of the first pressure gauge 43. When the reading of the first pressure gauge 43 is zero, it is confirmed that the pressure inside the first ball receiving and launching device 100a is normal. When the pressure inside the first ball receiving and launching device 100a is normal, open the first liquid inlet valve 42 so that the pressurization pipe 44 fills the ball cylinder 1 of the first ball receiving and launching device 100a with liquid working medium. Slowly open the first exhaust valve 47. After the first exhaust valve 47 exhausts the air inside the first ball receiving and launching device 100a, the ball cylinder 1 of the first ball receiving and launching device 100a is filled with liquid working medium.

[0088] Step S6: Open the first ball valve 41 and slowly close the second ball valve 45. The multi-section internal detector can be pushed by the liquid working medium and enter the pipe to be tested 5.

[0089] In one illustrative embodiment, such as Figure 9 As shown, the oil and gas pipeline inspection system also includes a second pressure gauge 63, a discharge pipe 64, a first liquid outlet valve 62, a third ball valve 61, a fourth ball valve 65, a second three-way valve 66, a vent valve 67, a drain valve 68, and a ball passage indicator 69. The second pressure gauge 63 is installed on the first pipe section 11 of the second launcher / receiver device 100b and is used to detect the pressure within the first pipe section 11 of the second launcher / receiver device 100b. One end of the first liquid outlet valve 62 is connected to the discharge pipe 64, and the other end is connected to the inlet / outlet of the second launcher / receiver device 100b. When the first liquid outlet valve 62 is open, the inlet / outlet of the second launcher / receiver device 100b can input liquid working fluid into the discharge pipe 64. The third ball valve 61 is installed at the opening of the third pipe section 13 of the second launcher / receiver device 100b and can open and close the opening of the third pipe section 13 of the second launcher / receiver device 100b. The third ball valve 61 can be an interface connected at one end to the second launcher / receiver device 100b. The other end of the third ball valve 61 is connected to one port of the second tee 66 via a pipe. This pipe can be over 20 meters long to ensure smooth operation of the internal detection system. The other two ports of the second tee 66 are connected to one end of the discharge pipe 64 and one end of the pipe section to be tested, respectively. The fourth ball valve 65 is installed at the end of the discharge pipe 64 connected to the second tee 66, used to disconnect and connect the discharge pipe 64 and the second tee 66. The vent valve 67 is installed at the top of the first pipe section 11 of the second launcher / receiver device 100b. The drain valve 68 is installed at the bottom of the first pipe section 11 of the second launcher / receiver device 100b. The ball-passing indicator 69 is installed on the third pipe section 13 of the second launcher / receiver device 100b, used to detect whether a multi-section internal detector has passed through the third pipe section 13.

[0090] When the multi-section internal detector is inside the pipeline 5 to be tested, the steps for the oil and gas pipeline detection system to retrieve the multi-section internal detector include:

[0091] Step S1a: When the quick-opening blind flange 2 of the second launcher / receiver device 100b is closed and the vent valve 67 and drain valve 68 are closed, the third ball valve 61 is opened, the first liquid outlet valve 62 is opened, and the fourth ball valve 65 is closed, so that the liquid working medium in the test pipe 5 flows through the cylinder 10 of the second launcher / receiver device 100b and then flows into the discharge pipe 64, and the multi-section internal detector can be pushed into the cylinder 10 of the second launcher / receiver device 100b by the fluid working medium;

[0092] Step S2a: After the ball indicator 69 measures that the multi-section internal detector has passed through the third pipe section 13, close the third ball valve 61 and the first liquid outlet valve 62, and then open the vent valve 67 to discharge the gas in the ball cylinder 1 of the second ball receiving and launching device 100b, release the pressure in the ball cylinder 1, and close it after the gas in the ball cylinder 1 has been discharged.

[0093] If the pipeline 5 to be tested contains toxic gases such as H2S, the operator needs to wear a gas mask to operate the vent valve 67.

[0094] Step S3a: Open the drain valve 68 to discharge the liquid working medium in the cylinder 10 of the second ball receiving and launching device 100b;

[0095] Step S4a: When the reading of the second pressure gauge 63 is zero, open the quick-opening blind plate 2 of the second ball receiving and launching device 100b and pull out the slide plate 3 from the cylinder 10 of the second ball receiving and launching device 100b.

[0096] During the process of pulling out the slide plate 3, the multi-section internal detector is also pulled out of the cylinder 10.

[0097] Step S5a: Remove the multi-section internal detector from the slide plate 3, put the slide plate 3 back into the cylinder 10 of the second ball receiving and launching device 100b, and close the quick-opening blind plate 2 of the second ball receiving and launching device 100b.

[0098] After completing the operation of sending and receiving multi-section internal detectors, the first launcher / receiver unit 100a can be disassembled from the first ball valve 41, and a blind flange can be installed on the first ball valve 41 to seal its interface. Similarly, the second launcher / receiver unit 100b can be disassembled from the third ball valve 61, and a blind flange can be installed on the third ball valve 61 to seal its interface. The disassembled launcher / receiver units 100a and 100b can be reused, which helps reduce the cost of internal detection operations.

[0099] The first launcher / receiver device 100a and the second launcher / receiver device 100b can be two different launcher / receiver devices 100, located at opposite ends of the pipe 5 to be tested. The first launcher / receiver device 100a is used to launch the multi-section internal detector, and the second launcher / receiver device 100b is used to retrieve the multi-section internal detector. Alternatively, the first launcher / receiver device 100a and the second launcher / receiver device 100b can be the same launcher / receiver device 100 that is used for both launching and retrieving the multi-section internal detector.

[0100] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0101] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0102] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

Claims

1. A ball receiving and launching device, characterized in that, Used for launching and recovering multi-segment internal detectors, including: The bulb tube includes: ---The cylinder consists of a first pipe section, a second pipe section, and a third pipe section connected in sequence. The inner diameter of the first pipe section is larger than the inner diameter of the third pipe section. The first pipe section is provided with inlet and outlet ports. ---Quick-opening blind flange, hinged to the end of the first pipe section facing away from the second pipe section, for opening and closing the opening at the end of the first pipe section facing away from the second pipe section; and A sliding plate, which can be integrally pulled out or pushed in along the axial direction of the first pipe section, the sliding plate comprising: ---A plate body is disposed within the first pipe section, including a first plate surface abutting against the inner circumferential surface of the first pipe section and a second plate surface opposite to the first plate surface. The plate body is provided with mounting holes, and first shaft holes are provided on opposite sides of the mounting holes. ---The latch includes a connecting part with a second shaft hole and a latch extending radially outward from the edge of the connecting part along the second shaft hole. The ball receiving and launching device also includes a rotating shaft. The connecting part is disposed in the mounting hole. The rotating shaft passes through the second shaft hole and its two ends extend into the two first shaft holes respectively, so that the latch is rotatably connected to the plate. The latch can only rotate between a first position extending in the direction away from the first plate surface and a second position tilting towards the third pipe section. ---Elastic element, connected to the latch and the plate, is used to apply elastic force to the latch so that the latch tends to return to the first position. The ball receiving and launching device is configured such that: when the multi-section inner detector is placed on the second plate and the cup sleeved on the multi-section inner detector is located on the side of the latch near the second pipe section, during the process of injecting liquid working fluid into the first pipe section to pressurize the first pipe section, the claw of the latch in the first position abuts against the side wall of the mounting hole facing away from the third pipe section so that the latch can hold the cup to prevent the multi-section inner detector from sliding backward toward the quick-opening blind plate; during the process of the liquid working fluid pushing the multi-section inner detector toward the third pipe section, when the cup on the side of the latch facing away from the third pipe section passes through the latch, the latch can be pressed toward the second position by the cup to allow the cup to pass through, and after the cup passes through, the elastic element immediately drives the latch to return to the first position.

2. The ball receiving and launching device according to claim 1, characterized in that, The inner diameters of the first and third pipe sections are uniform, and the cross-sectional area of ​​the second pipe section gradually decreases from the first to the third pipe section.

3. The ball receiving and launching device according to claim 1, characterized in that, Both the first plate surface and the second plate surface are constructed as cylindrical surfaces coaxial with the first pipe section, and the diameter of the first plate surface is the same as the inner diameter of the first pipe section.

4. The ball receiving and launching device according to claim 1, characterized in that, The elastic element is a torsion spring, with its two ends connected to the connecting part and the plate respectively.

5. The ball receiving and launching device according to any one of claims 1 to 4, characterized in that, The first pipe segment and the third pipe segment are parallel to each other, and the cross-section of the third pipe segment is tangent to the projection of the cross-section of the first pipe segment onto the axial direction of the first pipe segment; The slide plate is disposed on one side of the first pipe section near the third pipe section.

6. The ball receiving and launching device according to any one of claims 1 to 4, characterized in that, An interface is provided at the end of the third pipe section facing away from the second pipe section.

7. An oil and gas pipeline inspection system, characterized in that, include: The first ball receiving and serving device is the ball receiving and serving device as described in any one of claims 1 to 6; A first pressure gauge is installed on the cylinder of the first ball receiving and launching device to measure the pressure inside the cylinder; Pressurized pipelines are used to supply liquid working fluids; The first liquid inlet valve is connected at one end to the pressurization pipeline and at the other end to the liquid inlet and outlet of the first ball receiving and launching device. The first ball valve is connected at one end to the opening of the third pipe section of the first ball receiving and launching device; The first three-way valve has three ports that are respectively connected to the other end of the first ball valve, the pressurized pipeline, and the pipeline to be tested. The second ball valve, installed on the pressurization pipeline, is used to connect and disconnect the pressurization pipeline from the pipeline under test; and The first exhaust valve is located on the first pipe section of the first ball receiving and launching device.

8. The oil and gas pipeline inspection system according to claim 7, characterized in that, include: The second ball receiving and serving device is the ball receiving and serving device as described in any one of claims 1 to 6; The second pressure gauge is installed on the cylinder of the second ball receiving and launching device to measure the pressure inside the cylinder; Discharge pipes are used to discharge liquid working fluids; The first liquid outlet valve is connected at one end to the discharge pipe and at the other end to the inlet and outlet of the second ball receiving and launching device; The third ball valve is connected at one end to the opening of the third pipe section of the second ball receiving and launching device; The second three-way valve has three ports that are respectively connected to the other end of the third ball valve, the discharge pipe, and the pipe to be tested; The fourth ball valve, installed on the discharge pipe, is used to connect and disconnect the discharge pipe from the pipe to be tested; and A vent valve is located at the top of the first pipe section of the second ball receiving and launching device; A drain valve is located at the bottom of the first pipe section of the second ball receiving and launching device; A ball-passing indicator is installed on the third section of the second ball-receiving and receiving device to detect whether a multi-section internal detector passes through the third section.

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