System, process, and device for surface sampling of submarine pipeline

Abstract

A device for surface sampling of a submarine pipeline comprises a main frame assembled to a subframe via a lifting portion, which receives power from a power transmission device to move the subframe away from the main frame. A gap which is open to an exterior is provided to allow fluids from the exterior to flow therethrough and create a force equilibrium in a direction parallel to a movement of the subframe, thereby reducing the load on the power transmission device. Due to this design, it is required to use a system for surface sampling of a submarine pipeline comprising a position control unit for controlling the operation of the lifting portion, a sampling distance verification unit for determining the target position by monitoring the operation of the power transmission device, and a sampling unit for controlling a sampler's operation to correspond with the operations of other operational units for accurate sampling distance determination. These systems operate in accordance with a process for surface sampling of a submarine pipeline, which involves the steps of moving the subframe, recording the distance, moving the subframe back, starting the sampler's operation, moving the subframe to a detectable position, and moving the subframe to the starting position. These steps enable the device for surface sampling of a submarine pipeline to operate at full efficiency.

Description

[0001] SYSTEM, PROCESS, AND DEVICE FOR SURFACE SAMPLING OF SUBMARINE

[0002] PIPELINE

[0003] TECHNICAL FIELD

[0004] Engineering related to a system, process, and device for surface sampling of a submarine pipeline

[0005] BACKGROUND OF THE INVENTION

[0006] Petroleum pipeline is considered an essential component for fuel transportation, as they offer greater stability, safety, and speed compared to all types of vehicles. However, this comes with potential deterioration that can occur from prolonged use of petroleum pipeline. That is, certain sediment or minerals present in petroleum can bind together and form layers of deposits inside the pipeline, which could impact the environment when the pipeline is repaired or removed. Particularly, deep-sea petroleum pipeline requires strict inspection for deterioration and deposits within the pipeline to prevent leakage caused by the deterioration of the pipeline, which could result in significant environmental damage.

[0007] Furthermore, when the extraction of natural resources in a certain area is completed or when the petroleum pipeline in a certain area reaches the end of its service life, the owner or concessionaire is required to remove the petroleum pipeline. However, the removal of deep-sea petroleum pipeline is a difficult and costly process. Therefore, leaving expired petroleum pipeline at its installation site is allowed under strict regulations. One of these regulations is that it must be ensured that the petroleum pipeline left in place does not contain harmful minerals in quantities exceeding the specified limits.

[0008] It can be said that technologies and inventions capable of inspecting the formation of mineral layers inside deep-sea petroleum pipeline, both for maintenance and for the removal of unwanted pipeline, are essential for the industry.

[0009] Upon checking the patent database, some inventions with the ability to inspect the formation of mineral layers inside deep-sea petroleum pipelines were found as follows.

[0010] US 10,969,345 B2 discloses an invention for detecting mercury, which is a hazardous heavy metal, within deep-sea petroleum pipeline. The device comprises a mercury detector utilizing Neutron Activation Analysis technology, integrated with a magnet for mounting the device to the pipeline and emitting radiation or waves for detection while avoiding the magnet. Two such devices are used to detect the presence of mercury at two locations in order to obtain an average for summarizing the mercury content measurement within the petroleum pipeline.

[0011] Although such an invention can detect the mercury content within deep-sea petroleum pipeline, users are still required to use divers or underwater vehicles to install the device on the petroleum pipeline. Also, in a case where it is required to change the detection point, the device needs to be removed and installed on the pipeline at other locations. Considering the potentially long distance of the pipeline, this could result in a very high cost for detecting the mercury content throughout the entire petroleum pipeline system.

[0012] US 2008 / 0245258 Al discloses an invention designed for moving inside a petroleum pipeline, which supports the installation of various devices for different operations such as maintenance or cleaning. The invention comprises a drive assembly in the form of multiple wheels that come contact with the pipeline walls in all directions, with the ability to contract or expand to enable movement within pipelines of various sizes.

[0013] Such an invention can solve the problem of detection or movement along different points of deep-sea petroleum pipeline. However, when considering the deep-sea water pressure, which can affect the operation of the components within the device, especially motors or movable devices, the invention faces challenges regarding energy management and may have a very short operational range.

[0014] While the system, process, and device for surface sampling of a submarine pipeline according to this invention comprise a structure divided into two parts that can be separated, a main frame is in the form of a device for use inside a conventional submarine pipeline, while a subframe, which houses a sampling device, is assembled to a lifting portion connected to the main frame and receives power from a conventional power transmission device. Said lifting portion is assembled to both the main frame and subframe at a position with a gap which opens to an exterior, allowing external fluids to pass through and create an external pressure that applies force to the subframe in a direction parallel to its movement. This results in the cancellation of the force resisting the movement of the subframe. That is, the operational load of the conventional power transmission device can be reduced. As a result, the size, weight, and operational cost of sampling inside the deep-sea petroleum pipeline for evaluating the formation of mineral layers within the pipeline can be reduced.

[0015] Due to the design, the sampler device cannot move on its own and relies primarily on the movement of the subframe. Conventional sampling systems or processes therefore cannot be used in an effective manner for controlling the device for surface sampling of a submarine pipeline according to this invention. As a result, a new system and process for surface sampling of a submarine pipeline have been developed, comprising a position control unit for controlling the movement of the subframe, a sampling distance verification unit for assessing the required sampling distance by observing the power transmission device’s operation using various methods, and a sampling unit for controlling the operations of the sampler and the pump to correspond with the movement of the subframe.

[0016] SUMMARY OF THE INVENTION

[0017] A system, process, and device for surface sampling of a submarine pipeline comprise a main frame and a subframe connected via a lifting portion, which is a gap open to an exterior. The subframe comprises at least one sampling device. The lifting portion is configured to apply force to the subframe to lift it from the main frame for sampling. A processing unit operates in accordance with the process for surface sampling of a submarine pipeline to calculate an appropriate distance for moving the subframe to a target position and to control the operation of the sampler to correspond with such movement.

[0018] The invention aims to create a pressure balance parallel to the movement of the subframe, thereby reducing the load of the lifting portion when lowering the subframe. It effectively extends the lifespan, reduces the size, and minimizes the wear of other components required to support the operation of the lifting portion.

[0019] BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Fig. 1 shows an aspect of a cross-sectional view of the device for surface sampling of a submarine pipeline in a folded state.

[0021] Fig. 2 shows an aspect of a cross-sectional view of the device for surface sampling of a submarine pipeline in a lifted state.

[0022] Fig. 3 shows an aspect of the exterior of the device for surface sampling of a submarine pipeline.

[0023] Fig. 4 shows an aspect of a cross-sectional view of the water pumping portion inside the device for surface sampling of a submarine pipeline.

[0024] Fig. 5 shows an aspect of the operational units in the system for surface sampling of a submarine pipeline.

[0025] Fig. 6 shows an aspect of the process for surface sampling of a submarine pipeline. DETAILED DESCRIPTION

[0026] The details of the invention will now be described to provide a better understanding, in conjunction with the accompanying drawings. The same reference numbers in the drawings are used to denote identical or similar components throughout the detailed description of the invention.

[0027] Any aspects illustrated herein shall encompass applications to other aspects of the present invention, unless otherwise specified.

[0028] Technical or engineering terms used herein are defined as understood by a person of ordinary skill in the art, unless otherwise specified. The terms “consist of,” “comprise,” “contain,” “have / has,” and “include” are open-ended verbs. For example, “consisting of,” “comprising,” “containing,” “having,” and “including” one or more components are not intended to be limited to the one or more components mentioned but also encompass components that are not specified.

[0029] The system, process, and device for surface sampling of a submarine pipeline as presented herein is merely an illustration of one construction and embodiment. The system, process, and device for surface sampling of a submarine pipeline are provided with main components which are the main frame supporting a sample storage tube and general operation support devices, the subframe supporting the sampling device used for inspection, and the lifting portion installed outside both frames, with an opening between the two frames to create a pressure balance in a direction parallel to the movement of the subframe and reduce the load on a power transmission device.

[0030] Fig. 1 shows an aspect of a cross-sectional view of the device for surface sampling of a submarine pipeline in a folded state. The device comprises a main frame 100, which, as shown in this example, is configured as an enclosed area with at least one cross-sectional area identical to that of the surface or object to be inspected and not exceeding the dimensions of the cross- sectional area of the surface or object to be inspected. The main frame 100 is assembled to at least one lifting portion 300 to receive power from a power transmission device 110 to enable the movement of a subframe 200, which is assembled to the lifting portion 300, into or out of the main frame 100 following conventional methods.

[0031] As shown in the example, the power transmission device 110 is configured as a driving motor and a shaft, which converts the power transmission from the motor’s rotation into the rotation of an axis 111 which corresponds to the motor's rotation. The power transmission device 110 is also assembled to at least one of a rotation measuring device 140 or an electrical variable detection device 150, or a combination thereof, to monitor the operation of the power transmission device 110 and enable tracking of the position or movement distance of the subframe 200. The detected information is then sent to a processing unit for further calculations.

[0032] The axis 111 comprises threads that engage with the threads of a gripping arm 112, which is assembled to a lifting arm 301 of the lifting portion 300 in a manner that allows the lifting arm 301 to rotate no more than 90 degrees. The other side of the lifting arm 301 is attached to subframe 200. As a result, when the axis 111 rotates and transmits power to the gripping arm 112 to move it along the axis 111, the lifting arm 301 transmits power to the subframe 200 to raise or lower the position of the subframe 200 in a direction perpendicular to the orientation of the axis 111, as further illustrated in Fig. 2, which shows an aspect of a cross-sectional view of the device for surface sampling of a submarine pipeline in its lifted state. The reaction force exerted by the subframe 200 on the lifting arm 301 is stopped by controlling the rotation of the axis 111, preventing it from rotating with the force applied by the lifting arm 301 and the gripping arm 112. This allows the height of the subframe 200 to be independently controlled at various levels.

[0033] This operation helps convert the power generated by the rotation of axis 111 to exert a force on the subframe 200 through the lifting arm 301 in a direction perpendicular or at an angle to the orientation of axis 111. This design aims to minimize the space required for installation and operation of the lifting portion 300 and use the smallest possible working space.

[0034] In addition, the lifting arm 301 is further assembled to a supplementary arm 302 to create a suitable pivot point located at a central area between the two components. One end of the supplementary arm 302 is fixed to the main frame 100 to transfer the weight and reaction force from the subframe 200 to the main frame 100. This helps reduce the power and load of the power transmission device 110 that are required to counteract such reaction force or weight. The other end of the supplementary arm 302 is assembled to a sliding portion 303, which is assembled to a sliding rail 201 assembled to the lower side of the subframe 200. Preferably, the sliding portion 303 moves on the slide rail 201 in a direction parallel to the movement of the gripping arm 112 to distribute the lifting and resistant forces generated during the operation of the lifting arm 301.

[0035] The lifting portion 300 is assembled or mounted to the main frame 100 and subframe 200 at a point that creates a gap between the main frame 100 and subframe 200, which opens to an exterior on at least one side. This allows external fluids to flow through the gap between the main frame 100 and subframe 200, causing the force generated by the pressure of the fluid external to the subframe 200 to be applied to the surface of the subframe 200 in a balanced manner in each direction, especially in the direction parallel to the movement of the subframe 200.

[0036] As shown in this example, the gap that helps create a pressure balance is in the form of an opening 400, which opens a gap underneath the subframe 200 to generate a pressure acting on the surface of the subframe 200 in a direction parallel to the movement of the subframe 200 in both directions. This is illustrated by an upper pressure line 401 and a lower pressure line 402. Generally, both forces are of similar intensity such that they can be considered equal.

[0037] The equal forces generated in both directions results in a reduced workload for the power transmission device 110, which transmits power to the lifting portion 300, when moving the subframe 200. In other words, the power transmission device 110 can transmit power to move the subframe 200 without having to consider the power required to counteract the external pressure in the direction opposite to the movement of the subframe 200. The design of the opening 400 therefore significantly reduces the energy required by the power transmission device 110 to move the subframe 200 and allows for the reduction in the size of the associated components, while extending the lifespan of the power transmission device 110.

[0038] The main frame 100 further comprises at least one grille 410 covering the opening 400, as shown in Fig. 3, which shows an aspect of the exterior of the device for surface sampling of a submarine pipeline. The grille 410 is intended to prevent sediment from entering the opening 400 and interfering with the operation of the internal components.

[0039] The main frame 100 further comprises at least one sample storage unit 120 located within a switching chamber 423 to collect samples obtained from the operation of a sampler 210. According to the example shown, the sample storage unit 120 is configured as a rotating platform 121 to store at least one sample storage tube 122. Said rotating platform 121 is powered by a driving device 123, enabling the rotating platform 121 to rotate and switch the sample storage tube 122 connected to a sample receiving pipe 124 for sample storage as appropriate.

[0040] The sample storage unit 120 operates in conjunction with a pump 510 within a water pumping portion 500, which can be integrated into either the main frame 100 or the subframe 200 or be separate from the main frame 100 or the subframe 200, as shown in Fig. 4, which shows a cross-sectional view of the water pumping portion 500 within the device for surface sampling of a submarine pipeline. The water pumping portion 500 comprises a conventional pump 510 assembled to a suction pipe 520, which is assembled to a filter 521 of the sample storage tube 122 within the main frame 100. The pump 510 creates suction through the sample storage tube 122, drawing in samples collected by the sampler 210 for storage within the sample storage tube 122. Fluids and residues smaller than the gap of the filter 521 are discharged to the outside through an opening 530.

[0041] Since the suction pipe 520 serves as a passage for small sediment which may be metal fragments or high-hardness objects, the suction pipe 520 is preferably made of hard, erosion-resistant materials such as polyether ether ketone (PEEK) to protect it from pressure, erosion, or damage caused by contact with the sample passing through.

[0042] The subframe 200 further comprises a closure plate 420, which is assembled to the subframe 200 through a fastening pin 421 to close the switching chamber 423. The switching chamber 423 can be opened into the interior of the subframe 200 at the point where the rotating platform 121 is mounted to the sample storage unit 120 to allow the user to access and disassemble the rotating platform 121 or the sample storage tube 122 from the outside.

[0043] The subframe 200 is configured as an enclosed area assembled to the lifting portion 300 and comprises at least one sampler 210, which is connected to at least one sample delivery pipe 211 to transfer samples obtained from the operation of the sampler 210 to the sample storage tube 122 through the sample receiving pipe 124. According to this example, said sampler 210 is a conventional drilling head with built-in drive power. Said sampler 210 does not have the ability to move vertically but instead relies on the movement of subframe 200, caused by the operation of the lifting portion 300, for vertical movement.

[0044] The sample delivery pipe 211 has a diameter that allows it to be inserted into the sample receiving pipe 124 in a fitted manner. According to the example, the sample receiving pipe 124 is mounted to the main frame 100 such that it is secured with one end facing upwards, while the other end is assembled to the sample storage tube 122. The sample delivery pipe 211 connected to the sampler 210 passes through the subframe 200 such that it is securely attached to the subframe 200 and inserted into the sample receiving pipe 124 such that it can move vertically according to the movement of the subframe 200, with the end of the sample delivery pipe 211 that fits into the sample receiving pipe 124 unable to detach therefrom.

[0045] The sample delivery pipe 211 and the sample receiving pipe 124 are made of hard, abrasion-resistant material, preferably polyether ether ketone. This design enables delivery of samples obtained from the operation of the sampler 210 to the sample storage tube 122 while the subframe 200 is being lifted freely in different positions.

[0046] In addition to the components mentioned above, the main frame 100 and the subframe 200 further comprise other components designed to support the operation of the sampler 210 to allow it to function efficiently, as follows.

[0047] A distance measuring device 130 is preferably an odometer, which is assembled to the main frame 100 or the water pumping portion 500 such that it contacts the surface of the object through which the main frame 100 or the water pumping portion 500 passes. The device is intended to measure the distance the device has traveled according to the general purpose and function of the distance measuring device 130 and to send the detected information to the processing unit for tracking the current position of the device.

[0048] An imaging device 220 is assembled to the main frame 100 or the subframe 200 to capture images of predetermined areas for monitoring or inspecting the surrounding areas, such as the front, rear, or lower side of the main frame 100. The imaging device 220 is also assembled to the subframe 200 and captures images in the area where the sampler 210 performs the sampling process. This allows for studying various impacts occurring during the sampling process while simultaneously monitoring the operation of the sampler 210.

[0049] The main frame 100 and the subframe 200 can further comprise different variable detection devices according to operational requirements without limitation. These devices can be selected from any one of light sensors, pressure sensors, speed sensors, chemical measurement devices, temperature measurement devices, motion detection devices, or a combination thereof. These devices may be identical or different depending on the intended application of the user.

[0050] Fig. 5 shows an aspect of the operational units within the system for surface sampling of a submarine pipeline, specifically designed to operate in conjunction with the device for surface sampling of a submarine pipeline according to the present invention. The dashed arrows indicate the transmission of power or samples between devices, while the solid arrows indicate information transmission between devices or operational units. The system for surface sampling of a submarine pipeline comprises the main frame 100 assembled to the subframe 200 via the lifting portion 300, which receives power from the power transmission device 110 for moving the subframe 200. The power transmission device 110 is assembled to at least one of the rotation measuring device 140 or the electrical variable detection device 150 to monitor the operation of the power transmission device 110. The detected information is transmitted to the processing unit that operates in conjunction with a memory that is recorded with at least the following operational units.

[0051] A position control unit 600 operates in conjunction with at least the power transmission device 110 to control the movement and position of the subframe 200. According to this example, the position control unit 600 controls the power transmission device 110 to transmit power to the lifting portion 300 to move the subframe 200 vertically, both upward away from the main frame 100 and downward to return to its original position within the main frame 100.

[0052] A target position measuring unit 700 operates in conjunction with at least the position control unit 600 and the rotation measuring device 140 to process and calculate the distance between the initial position of the subframe 200 and the required sampling position by sending an instruction to the position control unit 600 to move the subframe 200 until the subframe 200 contacts the required sampling area, processing the detected variables from the power transmission device 110 to determine the distance between the initial position of the subframe 200 and the required sampling position and record this as a target position, while moving the subframe 200 from the current position back to a predetermined position, and transmitting the processed information and calculation completion information to a sampling unit 800.

[0053] The rotation measuring device 140 is in the form of an encoder, which is used to measure at least one information of normal power rating, the number of rotations, rotational speed, real-time power ratings, degree of rotation, or any other variables related to the movement of the motor within the power transmission device 110. At least one of these variables is processed as a target position.

[0054] The target position measuring unit 700 monitors the contact between the subframe 200 and the required sampling position by sending an instruction to the position control unit 600 to move the subframe 200 from its initial position using the normal power rating. It then begins to operate in conjunction with the rotation measuring device 140 to monitor the real-time operation of the power transmission device 110 when the subframe 200 contacts the required sampling area, such as a wall, ceiling, or surface, and then send the results to the power transmission device 110. The results provide a real-time power rating that differs from the pre-recorded normal power rating due to resistant or reaction force generated by the contact with the inspected area. This allows the target position measuring unit 700 to detect that the subframe 200 has reached the required sampling point. The target position measuring unit 700 further operates in conjunction with the electrical variable detection device 150 in various ways. The electrical variable detection device 150 preferably serves to monitor the amount of electric current used by the power transmission device 110 to move the subframe 200 and detects any abnormal electric current consumption pattern, such as electric current that is higher than normal operating electric current or a predetermined amount. This information is used to determine whether the subframe 200 has come contact with the target sampling area. The determination takes into account the increased energy or electric current consumed by the power transmission device 110 to overcome the resistant force from the required sampling area while attempting to continue moving the subframe 200. This allows the sampling distance verification unit 700 to recognize whether the subframe 200 has reached and contacted the required sampling area and proceed to calculate the distance in conjunction with the rotation measuring device 140.

[0055] The distance or position that the target position measuring unit 700 sends to the position control unit 600 to move the subframe 200 back can be adjusted as appropriate and predetermined by the user, for example, a distance of 5-10 mm or the starting point of the subframe 200 before any operations began.

[0056] The target position measuring unit 700 operates in conjunction with the distance measuring device 130, which is preferably in the form of an odometer mounted to the main frame 100, the subframe 200, or the water pumping portion 500, to monitor the overall travel distance. An instruction is then sent to the position control unit 600 to move the subframe 200 to initiate the operations described above upon detecting that the overall system has reached the specified point. The specified point information is predetermined by the user.

[0057] In addition, the target position measuring unit 700 operates in conjunction with the distance measuring device 130 to monitor the movement of the overall system and sends an instruction to the position control unit 600 to move the subframe 200 only when it is detected that the overall system has stopped moving. This is to prevent potential damage to all components in a case where they are operating while the overall system is still in motion.

[0058] The sampling unit 800 operates in conjunction with the sampler 210 by issuing an instruction to begin operation upon receiving the calculation completion information from the target position measuring unit 700. The sampler 210 is in the form of a drill which begins to rotate upon receiving said instruction. Meanwhile, the sampling unit 800 operates in conjunction with the position control unit 600 to move the subframe 200 to a new determined point, as determined by the sampling unit 800 based on the target position information obtained from the processing of the target position measuring unit 700. Said new determined point is located 2 mm beyond the target position, using distance references from the rotation measuring device 140 or the electrical variable detection device 150, or a combination thereof. Additionally, an instruction is sent to the position control unit 600 to move the subframe 200 back to the starting point to complete the operation upon detecting that the subframe 200 has moved to the new point determined by the sampling unit 800.

[0059] The new point determined by the sampling unit 800 can be adjusted as appropriate. For example, if a sample is required from the surface only, the user can adjust the calculation of the new determined point to be exactly at the target position. Alternatively, the calculation can be adjusted so that the new determined point is located beyond the target position if a sample is required from the inner surface of the target area.

[0060] When the sampling unit 800 detects that the subframe 200 has moved to the new determined point, the sampling unit 800 sends an instruction to the position control unit 600 to move the subframe 200 back to the starting point to complete the operation.

[0061] The sampling unit 800 further operates to maintain the subframe 200 in the current position for a period of time upon detecting that the subframe 200 has reached the new determined point. Initially, this period is set to 5-10 seconds to allow any sample fragments to be fully transferred to the sample storage tube 122 through the sample delivery pipe 211.

[0062] The sampling unit 800 further operates in conjunction with the sample storage unit 120, which is connected to the sampler 210 via the sample receiving pipe 124 and the sample delivery pipe 211, to control the driving device 123 to rotate the rotating platform 121 to replace the existing sample storage tube 122 with another sample storage tube 122 to receive the samples obtained from the above operations by connecting to the sample receiving pipe 124.

[0063] The sampling unit 800 further operates to check the sample storage status information of the sample storage tube 122 at each position and select only the sample storage tube 122 identified as not having received any samples to connect to the sample receiving pipe 124. It also links the position of the sample storage tube 122 that has already received a sample with the sample storage status information to indicate that the sample storage tube 122 has received a sample, thereby preventing the sample from being collected in more than one position within the same sample storage tube 122. The sampling unit 800 further operates in conjunction with the distance measuring device 130 to check the current position and links this information with the sample storage status of the sample storage tube 122 that has already received a sample. This is used to reference the sample collection position within a certain sample storage tube 122.

[0064] The sampling unit 800 further operates in conjunction with the pump 510 to start pumping fluids as soon as the sampler 210 begins operation, ensuring that all generated samples are pumped and stored within the sample storage tube 122. Additionally, the sampling unit 800 sends an instruction to stop the operation of the pump 510 upon detecting that the subframe 200 has returned to the starting point.

[0065] In a case where the sampling unit 800 operates in conjunction with both the sample storage unit 120 and the pump 510, the sampling unit 800 checks the operational status of the pump 510 and sends an instruction to stop all operations before controlling the driving device 123 to rotate the rotating platform 121. This prevents overlapping operations that could potentially damage both devices.

[0066] Fig. 6 shows an aspect of a process for surface sampling of a submarine pipeline, which starts from moving the subframe 901 away from the main frame 100 until the subframe 200 cannot be moved further. That is, it is detectable that the subframe 200 has made contact with the target sampling position, based on the detection of at least one of the rotation measuring device 140 or the electrical variable detection device 150.

[0067] A step of recording the distance 902 that the subframe 200 is able to move, based on the detection of the rotation measuring device 140. The distance is recorded as a target position information to serve as a criterion for subsequent steps.

[0068] A step of moving the subframe 901 back from the target position 903 is intended to allow the sampler 210 to begin operation independently without obstruction or additional load during startup. The distance the subframe 200 is moved back can be adjusted freely. The subframe 200 is preferably moved back from the target position 903 by a distance of 5 to 10 mm.

[0069] A step of operating the sample 904 where the sampler 210, which is in the form of a drill, is then activated. The step of operating the sampler 904 is carried out until the sampler 210 reaches its maximum rotational speed and maintains a constant speed before proceeding to the next step.

[0070] A step of pumping 905 is carried out by sending an instruction to the pump 510 to start its operation. A step of moving the subframe 200 to the target position 906, based on the target position information obtained from the step of recording the distance 902. The movement of the subframe 200 to the target position 906 can involve moving it precisely to the target position or increasing or decreasing the distance of the subframe 200 movement freely, based on said target position information. These adjustments depend on the user's need and predetermination, which may vary depending on surrounding variables. For example, in a case where a sample at the surface is needed, the user may determine that the movement of the subframe 200 to the target position 906 is a movement precisely to the target position. Alternatively, in a case where a sample from the deeper layer of the surface of the pipeline is needed, the user can determine that the movement of the subframe 200 to the target position 906 is a movement to a point 2 mm beyond the target position obtained from the step of recording the distance 902.

[0071] The movement of the subframe 200 to the target position 906 involves moving the subframe 200 no more than 2 mm beyond the target position obtained from the distance recording step 902 in order to collect both the sample at the external surface and perform a slight drilling to collect a sample from the deeper layer of the surface.

[0072] A step of pausing 907 is performed to keep the subframe 200 in the position reached during the step of moving the subframe 901 to the target position 906 while maintaining the operation of the sampler 210. The duration of the pausing 907 can be adjusted as appropriate and is initially set from 5-10 seconds.

[0073] A step of moving the subframe 901 to the starting position 908 is performed simultaneously with sending an instruction to the pump 510 to stop its operation, in case a step of pumping 905 is performed in the previous steps.

[0074] There may be an additional step of controlling the sample storage unit 910 to move the sample storage tube 122, which contains the sample obtained from all of the above operations, away from the connection to the sample receiving pipe 124 and replace it with another sample storage tube 122, which is then connected to the sample receiving pipe 124.

[0075] Before proceeding to the step of controlling the sample storage unit 910, there may be an additional step of verifying the sample storage status information 909 of all sample storage tubes 122 to acquire the position information of the sample storage tube 122 that has not yet been filled with any sample. Then, the step of controlling the sample storage unit 910 is carried out based on said position information to prevent adding samples into a sample storage tube 122 that has already been filled with a previous sample. Any modifications or changes may be clearly understood and implemented by those skilled in the art, provided that they fall within the scope and intent of the present invention, as shown in the appended claims.

[0076] BEST MODE OF THE INVENTION Best mode of the invention is as described in the detailed description of the invention.

Claims

WHAT IS CLAIMED IS:

1. A device for surface sampling of a submarine pipeline comprises a subframe (200) comprising a sampler (210) assembled to a sample delivery pipe (211), and a main frame (100) having a cross-sectional area that is not larger than that of an area or object required to be surveyed, the main frame (100) comprising a sample receiving pipe (124) connected to a sample storage unit ( 120) and the sample delivery pipe (211) characterized in that the main frame ( 100) is assembled to the subframe (200) via at least one lifting portion (300) to receive power from a power transmission device (110) to move the subframe (200) at a location where the subframe (200) can be moved to create a gap between the main frame (100) and the subframe (200), the gap being open to an exterior on at least one side, causing various fluids from the exterior to freely flow through said gap and creating a force equilibrium, which is caused by an external pressure in a direction parallel to a movement of the subframe (200).

2. The device for surface sampling of a submarine pipeline according to claim 1, wherein the lifting portion (300) comprises a lifting arm (301) assembled to a threaded axis (111) via a gripping arm (112) such that the lifting arm (301) can move to form an angle with the gripping arm (112), while the other end of the lifting arm (301) is secured to the subframe (200).

3. The device for surface sampling of a submarine pipeline according to claim 2, wherein the angle formed by the movement of the gripping arm (112) and the lifting arm (301) does not exceed 90 degrees.

4. The device for surface sampling of a submarine pipeline according to claim 2, wherein the lifting arm (301) is assembled to a supplementary arm (302) in a manner to create a pivot point between the two components, with one end of the supplementary arm (302) secured to the main frame (100) and the other end assembled to a sliding portion (303) positioned on a sliding rail (201), which is assembled to a surface of the subframe (200).

5. The device for surface sampling of a submarine pipeline according to claim 4, wherein the pivot point between the lifting arm (301) and the supplementary arm (302) is located at a central area between the two components.

6. The device for surface sampling of a submarine pipeline according to claim 1, wherein the gap between the main frame (100) and the subframe ( 200) is configured as at least one opening (400) located between a region underneath the subframe (200) and the main frame (100).

7. The device for surface sampling of a submarine pipeline according to claim 1 or 6, wherein the main frame (100) further comprises a grille (410) covering the opening (400).

8. The device for surface sampling of a submarine pipeline according to claim 1, wherein the sampler (210) is connected to the sample receiving pipe (124) via the sample delivery pipe (211), which has a diameter that allows it to be inserted into the sample receiving pipe (124) in a fitted manner.

9. The device for surface sampling of a submarine pipeline according to claim 8, wherein the sample receiving pipe (124) is mounted to the main frame (100) such that it is secured with one end facing upwards, while the sample delivery pipe (211) connected to the sampler (210) passes through the subframe (200) such that it is securely attached to the subframe (200) and inserted into the sample receiving pipe (124) such that it can move vertically according to a movement of the subframe (200), with the end of the sample delivery pipe (211) that fits into the sample receiving pipe (124) unable to detach therefrom.

10. The device for surface sampling of a submarine pipeline according to claim 1, wherein the sample receiving pipe ( 124) is made of polyether ether ketone (PEEK).

11. The device for surface sampling of a submarine pipeline according to claim 1, wherein the sample delivery pipe (211) is made of polyether ether ketone (PEEK).

12. The device for surface sampling of a submarine pipeline according to claim 1, wherein the sample storage unit (120) is configured as a rotating platform (121) located within a switching chamber (423) and serves to store at least one sample storage tube (122), the rotating platform (121) being arranged to receive power from a driving device (123) to rotate the rotating platform (121) and switch the sample storage tube (122) connected to the sample receiving pipe (124) according to an instruction received.

13. The device for surface sampling of a submarine pipeline according to claim 1, wherein the subframe (100) further comprises a closure plate (420) assembled to the subframe (100) via a fastening pin (421) to close the switching chamber (423), which opens into an interior of the subframe (100) at a point where the rotating platform (121) is mounted to the sample storage unit (120).

14. The device for surface sampling of a submarine pipeline according to claim 12, wherein the sample storage tube (122) is assembled to a suction pipe (520) via a filter (521), said suction pipe (520) configured to receive suction power from a pump (510), allowing fluids and residues smaller than a gap of the filter (521) to pass out through an opening (530).

15. The device for surface sampling of a submarine pipeline according to claim 14, wherein the pump (510) is housed within a water pumping portion (500) such that it is separated from the main frame (100) and the subframe (200).

16. The device for surface sampling of a submarine pipeline according to claim 14, wherein the suction pipe (520) is made of polyether ether ketone (PEEK).

17. The device for surface sampling of a submarine pipeline according to claim 1, wherein the main frame (100) is assembled to a distance measuring device ( 130) such that it contacts a surface of an object through which the main frame (100) passes and transmits the detected information to a processing unit.

18. The device for surface sampling of a submarine pipeline according to claim 15, wherein the water pumping portion (500) is assembled to the distance measuring device (130) such that it contacts a surface of an object through which the waterpumping portion (500) passes and transmits the detected information to the processing unit.

19. The device for surface sampling of a submarine pipeline according to claim 17 or 18, wherein the distance measuring device (130) is an odometer.

20. The device for surface sampling of a submarine pipeline according to claim 1, wherein the power transmission device (110) is assembled to at least one rotation measuring device (140) or electrical variable detection device (150), or a combination thereof, which transmits all detected information to the processing unit.

21. The device for surface sampling of a submarine pipeline according to claim 1, wherein the main frame (100) is assembled to at least one imaging device (220) in the front, rear, or lower side of the main frame (100).

22. The device for surface sampling of a submarine pipeline according to claim 1, wherein the subframe (200) is assembled to the imaging device (220) and captures images in at least a region where the sampler (210) performs sampling.

23. A system for surface sampling of a submarine pipeline comprise the main frame (100) assembled to the subframe (200) via the lifting portion (300), which receives power from the power transmission device (110) to move the subframe (200), wherein said power transmission device (110) is assembled to the rotation measuring device (140), which transmits the detected information from the power transmission device (110) to the processing unit characterized in that the processing unit operates in conjunction with a memory that is recorded with at least the following operational units: a position control unit (600) operating in conjunction with at least the power transmission device (110) to control a movement and position of the subframe (200) via the lifting portion (300); a target position measuring unit (700) operating in conjunction with the position control unit (600) and the rotation measuring device (140) to process and calculate a distance between an initial position of the subframe (200) and arequired sampling position by sending an instruction to the position control unit (600) to move the subframe (200) until it contacts the required sampling area, processing the detected variables from the power transmission device (110) to obtain a target position, while moving the subframe (200) from a current position back to a predetermined position, and transmitting the processed information and calculation completion information to a sampling unit (800); and the sampling unit (800) operating in conjunction with the sampler (210) to start working immediately upon receiving the calculation completion information from the target position measuring unit (700) and operating in conjunction with the position control unit (600) to move the subframe (200) to a new point determined by the sampling unit (800) based on the target position information obtained from the processing of the target position measuring unit (700) and sending an instruction to the position control unit (600) to move the subframe (200) back to the starting point to complete the operation once it is verified that the subframe (200) moved to the new point determined by the sampling unit (800).

24. The system for surface sampling of a submarine pipeline according to claim 23, wherein the position control unit (600) controls the power transmission device (110) to transmit power to the lifting portion (300) to move the subframe (200) vertically, both upward away from the main frame (100) and downward to return to its original position within the main frame (100).

25. The system for surface sampling of a submarine pipeline according to claim 23, wherein the rotation measuring device (140) is an encoder.

26. The system for surface sampling of a submarine pipeline according to claim 23, wherein the rotation measuring device (140) counts at least one of the number of rotations, rotational speed, real-time power rating, or degree of rotation of a motor in the power transmission device (110).

27. The system for surface sampling of a submarine pipeline according to claim 23, wherein the target position measuring unit (700) detects a contact between the subframe (200) and the required sampling position by sending an instruction to theposition control unit (600) to move the subframe (200) from the initial position with normal power rating, and operates in conjunction with the rotation measuring device (140) to monitor the operation of the power transmission device (110) in real-time, which is different from the normal power rating previously recorded.

28. The system for surface sampling of a submarine pipeline according to claim 23, wherein the target position measuring unit (700) operates in conjunction with the electrical variable detection device (150) to monitor an amount of electric current consumed by the power transmission device (110) for moving the subframe (200) and detect any abnormal electric current consumption pattern to inspect the contact between the subframe (200) and the required sampling position.

29. The system for surface sampling of a submarine pipeline according to claim 28, wherein the abnormal electric current is at least one of the electric current that is higher than normal operating electric current or the electric current that is higher than a predetermined amount.

30. The system for surface sampling of a submarine pipeline according to claim 23, wherein the detected variable from the power transmission device (110) used in the processing to obtain the target position comprises at least one of normal power rating, number of rotations, rotational speed, real-time power rating, or degree of rotation.

31. The system for surface sampling of a submarine pipeline according to claim 23, wherein the predetermined position used as a reference to move the subframe (200) back after contacting the required sampling area is selected from a distance of 5-10 mm or the starting point of the subframe (200) movement.

32. The system for surface sampling of a submarine pipeline according to claim 23, wherein the target position measuring unit (700) operates in conjunction with the distance measuring device (130) to monitor the overall travel distance and send an instruction to the position control unit (600) to move the subframe (200) upon detecting that the device has reached the predetermined position.

33. The system for surface sampling of a submarine pipeline according to claim 23, wherein the target position measuring unit (700) operates in conjunction with the distance measuring device (130) to monitor the movement of the device and send an instruction to the position control unit (600) to move the subframe (200) upon detecting that the device has stopped moving.

34. The system for surface sampling of a submarine pipeline according to claim 32 or 33, wherein the distance measuring device (130) is configured as an odometer mounted to the main frame (100) or the water pumping portion (500).

35. The system for surface sampling of a submarine pipeline according to claim 23, wherein the new point determined by the sampling unit (800) is at least one of a position beyond the target position or a position exactly the same as the target position.

36. The system for surface sampling of a submarine pipeline according to claim 23, wherein the new point determined by the sampling unit (800) is a position that is 2 mm beyond the target position.

37. The system for surface sampling of a submarine pipeline according to claim 23, wherein the sampling unit ( 800) further operates to maintain the subframe (200) in the current position for a period of time upon detecting that the subframe (200) has reached the new determined point.

38. The system for surface sampling of a submarine pipeline according to claim 23, wherein the sampling unit ( 800) further operates in conjunction with the sample storage unit (120) to control the driving device (123) to rotate the rotating platform (121) in order to replace the existing sample storage tube (122) with another sample storage tube (122) to receive the samples obtained from its operation by connecting to the sample receiving pipe (124).

39. The system for surface sampling of a submarine pipeline according to claim 38, wherein the sampling unit (800) operates in conjunction with the distance measuring device (130) to check the current position and links said informationwith the sample storage status information of the sample storage tube (122) that has received the sample.

40. The system for surface sampling of a submarine pipeline according to claim 39, wherein the sampling unit (800) further operates to check a sample storage status information of the sample storage tube (122) at each position and selects only the sample storage tube (122) identified as not having received any samples to connect to the sample receiving pipe (124).

41. The system for surface sampling of a submarine pipeline according to claim 23, wherein the sampling unit (800) further operates in conjunction with the pump (510) to start pumping fluid immediately once the sampler (210) begins operation.

42. The system for surface sampling of a submarine pipeline according to claim 23, wherein the sampling unit (800) further operates to send an instruction to stop the operation of the pump (510) upon detecting that the subframe (200) has returned to the starting point.

43. The system for surface sampling of a submarine pipeline according to claim 41, wherein the sampling unit (800) checks the operational status of the pump (510) and sends an instruction to stop all operations before controlling the driving device (123) to rotate the rotating platform (121).

44. A process for surface sampling of a submarine pipeline comprises:I. moving the subframe (901) out of the main frame (100) until it is detectable that the subframe (200) has come contact with the target position for sampling;II. recording the distance (902) that the subframe (200) can travel and storing it as target position information;III. moving the subframe (901) back from the target position (903);IV. operating the sampler (904) until the sampler (210) reaches its maximum rotational speed and maintains a constant speed before proceeding to the next step;V. pumping (905) by sending an instruction to the pump (510) to start its operation;VI. moving the subframe to the target position (906) based on the target position information obtained from the step of recording the distance (902); andVII. moving the subframe to the starting position (908) and sending an instruction to the pump (510) to stop its operation.

45. The process for surface sampling of a submarine pipeline according to claim 44, wherein the step of moving the subframe (901) verifies that the subframe (200) has come contact with the target position, based on an inspection of at least one of the rotation measuring device (140) or the electrical variable detection device (150).

46. The process for surface sampling of a submarine pipeline according to claim 44, wherein the step of recording the distance (902) is based on an inspection of the rotation measuring device (140).

47. The process for surface sampling of a submarine pipeline according to claim 44, wherein the step of moving the subframe (901) back from the target position (903) involves moving the subframe (200) 5-10 mm away from said position, or returning it to the starting position.

48. The process for surface sampling of a submarine pipeline according to claim 44, wherein the step of moving the subframe (200) to the target position (906) involves at least one of moving the subframe (200) to a position that is precisely detectable or increasing or decreasing the distance of the subframe (200) movement, based on said target position.

49. The process for surface sampling of a submarine pipeline according to claim 44, wherein moving the subframe (200) to the target position (906) involves moving the subframe (200) at least 2 mm further than the distance recorded in the step of recording the distance (902).

50. The process for surface sampling of a submarine pipeline according to claim 44, wherein after moving the subframe (200) to the target position (906), a step of pausing (907) is additionally provided to keep the subframe (200) in the position reached in the step of moving the subframe to the target position (906), while maintaining the operation of the sampler (210) before proceeding to the step of moving the subframe (901) to the starting position (908).

51. The process for surface sampling of a submarine pipeline according to claim 44, wherein after the step of moving the subframe (901) to the starting position (908), a step of controlling the sample storage unit (910) is additionally provided to move the sample storage tube (122) containing the samples obtained from all of the above operations away from the connection to the sample receiving pipe (124) and replace it with another sample storage tube (122), which is then connected to the sample receiving pipe (124).

52. The process for surface sampling of a submarine pipeline according to claim 51, wherein before proceeding to the step of controlling the sample storage unit (910), a step of verifying the sample storage status information (909) of all sample storage tubes (122) is additionally provided to acquire a position information of the sample storage tube (122) that has not yet been filled with any samples before proceeding to the step of controlling the sample storage unit (910) based on said position information.

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