Submarine pipeline emergency unblocking system capable of achieving rapid sealing butt joint

Abstract

The invention relates to a submarine pipeline emergency unblocking system capable of achieving rapid sealing butt joint, and belongs to the field of ocean engineering equipment.The submarine pipeline emergency unblocking system comprises a barrel, a rapid connector, a power driving module and a drilling liquid spraying module, the rapid connector is used for being in butt joint with an upper umbilical cable and a lower umbilical cable, and the upper umbilical cable and the lower umbilical cable are connected into a long umbilical cable; the power driving module is used for pushing the drilling liquid spraying module to a blocking point in the submarine pipeline; and the drilling and liquid spraying module is used for removing the blockage of the blockage point. The emergency blockage removal system for the submarine pipeline integrates multiple functions of automatic operation, drilling, monitoring, medicament injection and the like, has the advantages of being rapid in blockage removal, low in energy consumption and the like, and is particularly suitable for the pipeline blockage removal situation that a deepwater submarine pipeline inhibitor is difficult to reach a blockage point.

Description

Technical Field

[0001] The invention belongs to the technical field of marine engineering equipment, and in particular relates to an emergency unblocking system for submarine pipelines capable of rapid sealing and docking. Background Art

[0002] During the operation of submarine pipelines that transport oil and gas resources, wax in the production fluid will precipitate as the temperature of the pipeline decreases and adhere to the pipe wall to form a deposition layer. Wax deposition may cause pipeline blockage, increase production safety risks, and cause huge economic losses. At present, common pipeline wax removal methods include mechanical method, heating method, and chemical method. The mechanical method scrapes the wax deposited on the pipe wall and pushes it out of the pipeline by launching a cleaning ball, but this method is prone to blockage due to excessive wax accumulation for pipelines with a large amount of wax accumulation, and it is difficult to remove aging and hardened wax deposits. The heating method melts the wax deposited on the pipe wall with hot oil and takes it out of the pipeline, but this method consumes a lot of energy, and because the pipeline dissipates heat to the surrounding environment, it is difficult to act on wax deposits far away from the inlet. The chemical method achieves the purpose of wax removal by changing the physical properties of the wax to dissolve and disperse it in the oil, but this method requires the development of different chemicals for different oil products, the chemical has poor versatility, high cost, and the chemical needs to be immersed in the deposition layer for a long time to fully play its role.

[0003] For deep-sea submarine pipelines, light hydrocarbons and water in the production fluid will form hydrates under high pressure and low temperature. The formation and accumulation of hydrates may also block the pipeline, resulting in increased safety risks and economic losses. Common methods for removing hydrates from pipelines include pressure reduction, heating, and inhibitor injection. The pressure reduction method reduces the pipeline pressure to below the hydrate phase equilibrium pressure to promote the decomposition of hydrates to achieve the purpose of unblocking, but the control of the pressure reduction rate of this method requires the operator to have rich experience to avoid the impact of hydrate blockages caused by the fast pressure reduction rate. The pressure reduction method takes a long time to suspend production and is not economical. The heating method decomposes hydrates by raising the pipeline temperature to above the hydrate phase equilibrium temperature to achieve unblocking, but this method has high energy consumption, and uneven local heating will cause local pressure buildup in the pipe, increasing the safety risk of the pipeline. The inhibitor injection method changes the hydrate phase equilibrium state by injecting inhibitors (such as methanol and ethylene glycol) to allow hydrates to enter the safe area for decomposition and unblocking. It is currently the most commonly used method in production.

[0004] In summary, when a blockage occurs in the submarine pipeline between the wellhead and the platform, the commonly used method is to inject chemicals to remove the blockage. However, due to the ups and downs of the submarine pipeline, it is difficult for the deblocking agent to reach the blockage point by gravity and take effect. As for how to clear the blockage point of the pipeline, the existing methods will encounter problems such as high energy consumption, long time consumption, and low safety. There is a lack of a device and method that can achieve rapid docking and can operate to remove the blockage point while maintaining a sealed state on the seabed. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a submarine pipeline emergency unblocking system that can be quickly sealed and docked, which is used to solve the problem that there is currently a lack of a device and method for unblocking the blockage point that can be quickly docked and operated in a sealed state on the seabed after a blockage point occurs in the submarine pipeline between the wellhead and the platform.

[0006] To achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention discloses a quick connector for docking with a pipe to be connected, wherein the pipe to be connected is provided with a connector to be connected, the connector to be connected is communicated with the pipe to be connected, and a connector groove is provided on the connector to be connected; The quick connector includes a clamping portion and a plug-in portion. An upper umbilical cable is inserted into the clamping portion, and the bottom end of the upper umbilical cable extends out of the clamping portion; The plug-in portion is provided with a lower umbilical cable hole, in which a lower umbilical cable is fixed, and the plug-in portion is temporarily bounded on the inner wall of the pipeline to be connected which is connected to the joint to be connected; When the quick connector is docked with the pipeline to be connected, the clamping part is clamped in the joint groove on the connector to be connected. At the same time, the bottom end of the upper umbilical cable extends into the connection between the connector to be connected and the pipeline to be connected, and is inserted downward into the lower umbilical cable hole of the plug-in part, docked with the top end of the lower umbilical cable, and connected into a long umbilical cable; In the process of inserting the bottom end of the upper umbilical cable downward into the lower umbilical cable hole of the plug-in part, the plug-in part is subjected to the downward pressure of the bottom end of the upper umbilical cable, gradually gets rid of the temporary restraint, and finally the plug-in part is separated from the inner wall of the pipe to be connected.

[0007] Preferably, the joint to be connected first protrudes toward the outside of the pipe to be connected, and then a flange is formed from the outer edge of the protrusion toward the periphery, the joint groove is formed on the flange, and the inner edge of the joint groove is set as an inclined surface; at least two wedge blocks are set at the bottom of the clamping part, and each wedge block is configured with a first spring; The inclined surface of the inner edge of the joint groove faces upward, the outer end of the wedge block is set as an inclined surface and the inclined surface of the wedge block faces downward, When the quick connector is connected to the pipe to be connected, the inclined surface of the wedge block of the clamping portion slides from the inclined surface of the inner edge of the joint groove until the wedge block of the clamping portion completes the clamping in the joint groove.

[0008] Preferably, a sealing ring is provided on the contact surface between the bottom of the clamping portion and the joint groove.

[0009] Preferably, a waterproof casing is butted against the top of the clamping portion, and the upper umbilical cable is inserted into the waterproof casing.

[0010] Preferably, a joint bolt is provided on the top of the clamping portion, and the top end of the joint bolt protrudes outward to form a flange baffle. A plurality of ejector pins are arranged on the top surface of the clamping portion, and a plurality of ejector pin holes are arranged on the outer edges of the flange baffles; A pressure plate is provided at the bottom end of the watertight casing, and a sealing gasket is provided at the connection between the pressure plate and the flange baffle, the sealing gasket is in a compressed state and presses the upper umbilical cable to prevent seawater from flowing into the watertight casing; When the inclined surface of the wedge block of the clamping part slides along the inclined surface of the inner edge of the joint groove, the top pin extends into the top pin hole corresponding to the flange baffle to prop up the pressure plate, and the sealing gasket in the compressed state stretches out to realize the unsealing between the upper umbilical cable and the sealing gasket.

[0011] Preferably, a second spring is provided in a gap between the flange baffle and the pressure plate and away from the sealing gasket.

[0012] Preferably, the plug-in portion is temporarily restrained on the inner wall of the pipe to be connected which is connected to the joint to be connected by a torsion spring and a buckle. Among them, one end of the torsion spring is fixed on the inner wall of the pipe to be connected, and the other end is provided with a buckle. Clamp eyes are respectively provided on both sides of the plug-in part, and the buckle is hung on the corresponding clamp eyes, thereby realizing that the plug-in part is temporarily restrained on the inner wall of the pipe to be connected which is connected to the joint to be connected.

[0013] Preferably, a plurality of positioning beads are evenly arranged along the circumferential direction on the hole wall of the lower umbilical cable hole of the plug-in portion.

[0014] Preferably, a plurality of sliding beads are evenly arranged along the circumferential direction on the outer wall of the plug-in portion.

[0015] In a second aspect, the present invention further discloses a submarine pipeline emergency unblocking system capable of rapid sealing and docking, which is used on an underwater manifold, wherein the underwater manifold is docked with a wellhead and a platform respectively through submarine pipelines, and an underwater launching point device interface is configured on the underwater manifold. The submarine pipeline emergency unblocking system comprises a cylinder, The cylinder is used as the pipeline to be connected, one end of which is an open end for docking with the underwater launching point device interface of the underwater manifold; the other end is a closed end, and the above-mentioned quick connector is arranged on the cylinder wall of the cylinder near the closed end, and the clamping part of the quick connector is docked with the working ship on the sea surface through the waterproof casing; A power drive module and a drilling fluid injection module are sequentially arranged inside the cylinder from the closed end to the open end, and the lower umbilical cable of the plug-in part of the quick connector passes through the power drive module and the drilling fluid injection module sequentially from back to front, and the power drive module and the drilling fluid injection module are connected together to form a blockage-releasing mechanism; Wherein, the power drive module is used to push the drilling fluid injection module to the blockage point in the submarine pipeline; The drilling fluid injection module comprises a drill bit, which is used for performing unblocking operations on the blockage points.

[0016] Preferably, the underwater manifold further comprises a wellhead interface and a platform interface, the wellhead interface is connected to the wellhead through a submarine pipeline, and the platform interface is connected to the platform through a submarine pipeline; A first switching valve is provided on the pipeline between the platform interface and the wellhead interface, and a second switching valve is provided on the pipeline between the platform interface and the underwater launching point device interface. By controlling the first switching valve and the second switching valve, the switching of the connection between the wellhead interface and the platform interface and the connection between the underwater launching point device interface and the platform interface can be realized.

[0017] Preferably, the power drive module includes a first connecting block, two drive motors, and four first connecting rods. Two driving motors are respectively arranged at the upper and lower positions behind the first connecting block, and four secondary connecting rods are respectively arranged in front of and on both sides of the first connecting block, wherein the upper and lower parts of the front of the first connecting block are respectively hinged with a primary connecting rod, and the left and right sides of the first connecting block are respectively hinged with a primary connecting rod; The output shaft of each driving motor and the bottom end of each first connecting rod are respectively provided with a roller, and the six rollers are symmetrically distributed along the longitudinal center line of the cylinder, and each roller of the first connecting rod abuts against the inner wall of the cylinder.

[0018] Preferably, a third spring is respectively disposed at the housing of the driving motor and at the junction of the first connecting rod and the first connecting block, and the third spring presses the roller against the inner wall of the cylinder by pre-tightening.

[0019] Preferably, the inner diameter of the cylinder is equal to the inner diameter of the submarine pipelines respectively connected to the platforms through the underwater manifolds.

[0020] Preferably, a liquid injection pipe is wrapped in the lower umbilical cable, the drilling liquid injection module includes a nozzle, and the nozzle is located above the drill bit, and the liquid injection pipe is connected to the nozzle of the drilling liquid injection module.

[0021] Furthermore, the unblocking mechanism further comprises a monitoring and drainage module, and the power drive module, the monitoring and drainage module and the drilling and spraying module are sequentially arranged inside the cylinder from the closed end to the open end of the cylinder; The monitoring and drainage module includes a second connection block, a temporary liquid storage bin is provided in the second connection block, the temporary liquid storage bin is provided with a liquid suction pump, the temporary liquid storage bin is configured with a liquid suction pipe, and the liquid inlet of the liquid suction pipe faces the lower part of the inner wall of the cylinder or the submarine pipeline; A liquid return pipe is also wrapped in the lower umbilical cable, and the liquid return pipe is connected to the temporary liquid storage tank of the monitoring and drainage module.

[0022] Preferably, the power drive module, the monitoring and drainage module and the drilling fluid injection module are respectively provided with main connecting rods, and the power drive module and the monitoring and drainage module as well as the monitoring and drainage module and the drilling fluid injection module are hinged through the main connecting rods, so that the power drive module, the monitoring and drainage module and the drilling fluid injection module are connected in series to form the unblocking mechanism; the lower umbilical cable of the plug-in part of the quick connector passes through the power drive module, the monitoring and drainage module and the drilling fluid injection module from back to front in sequence.

[0023] Furthermore, the monitoring and drainage module also includes six secondary connecting rods, which are respectively hinged on the second connecting block, wherein the upper and lower parts of the front of the second connecting block are respectively hinged with a second connecting rod, the upper and lower parts of the rear of the second connecting block are respectively hinged with a second connecting rod, and the left and right sides of the second connecting block are respectively hinged with a second connecting rod; a roller is arranged at the bottom end of each of the second connecting rods, and the rollers of the six second connecting rods are symmetrically distributed along the longitudinal center line of the cylinder, and each roller of the second connecting rod is in contact with the inner wall of the cylinder; a third spring is arranged at the junction of the second connecting rod and the second connecting block, and the third spring presses the roller against the inner wall of the cylinder by pre-tightening.

[0024] Furthermore, the monitoring and drainage module also includes a camera, the camera is equipped with a lighting lamp, the camera and the lighting lamp are integrated above the second connecting block, and the camera and the lighting lamp face the front of the second connecting block.

[0025] Further, the drilling fluid injection module also includes a third connection block and six third connection rods, and the six third connection rods are respectively hinged on the third connection block, wherein the upper and lower parts of the front of the third connection block are respectively hinged with a third connection rod, the upper and lower parts of the rear of the third connection block are respectively hinged with a third connection rod, and the left and right sides of the third connection block are respectively hinged with a third connection rod; A roller is disposed at the bottom end of each of the third connecting rods, and the rollers of the six third connecting rods are symmetrically distributed along the longitudinal center line of the cylinder, and each roller of the third connecting rod abuts against the inner wall of the cylinder; A third spring is disposed at the junction of the third connecting rod and the third connecting block, and the third spring presses the roller against the inner wall of the cylinder by pre-tightening.

[0026] Preferably, a deblocking agent bin is provided in the third connecting block, and deblocking agent is provided in the deblocking agent bin, and the injection pipe of the lower umbilical cable is connected to the deblocking agent bin of the drilling injection module.

[0027] Preferably, the drilling fluid injection module further comprises an automatic drilling fluid injection mechanism, and the automatic drilling fluid injection mechanism comprises the drill bit, the drilling motor, a drill rod, a touch switch, a power supply, a jet pump and the nozzle. A limit ring is provided on the drill rod, the drill rod is passed through the third connecting block, and the limit ring of the drill rod abuts against the inner side of the third connecting block, and the front end of the drill rod extends out of the third connecting block; The drill bit is fixed at the front end of the drill rod, and the drill bit is located right in front of the third connecting block, and a fourth spring is sandwiched between the drill bit and the outer wall of the third connecting block; The touch switch is arranged near the tail end of the drill rod; The nozzle is arranged directly above the drill bit and the nozzle of the nozzle is inclined upward, the jet pump is arranged in the unblocking agent bin, and the jet pump is connected to the nozzle through a pipeline; The output shaft of the drilling motor is provided with a driving gear, the drill rod is provided with a driven gear, and the driving gear is meshed with the driven gear; The power source, the drilling motor, the touch switch and the jet pump are connected in sequence through wires to form a closed loop in series.

[0028] Preferably, a guide groove is provided on the drill bit.

[0029] Preferably, the power drive module is equipped with a first controller, and the first controller is connected to the two drive motors respectively by wires; The monitoring and drainage module is equipped with a second controller, which is connected to the suction pump, the camera, and the lighting lamp through wires; The drilling fluid injection module is equipped with a third controller, and the third controller is connected to the drilling motor, the jet pump, the power supply and the touch switch through wires; A signal cable is also wrapped in the lower umbilical cable, and the first controller, the second controller and the third controller are respectively connected to the signal cable in the lower umbilical cable.

[0030] In a third aspect, the present invention further discloses a method for emergency unblocking of a submarine pipeline, which uses the above-mentioned emergency unblocking system for a submarine pipeline and comprises the following steps: Docking with underwater manifold: Once the submarine pipeline is blocked, the open end of the cylinder of the submarine pipeline emergency unblocking system is connected to the interface of the underwater launching point device of the underwater manifold through a quick flange; The upper umbilical cable is connected with the lower umbilical cable: the pipe mouth of the watertight casing on the working ship on the sea surface is connected with the clamping part of the quick connector, the working ship lowers the watertight casing, and the clamping part of the quick connector is close to the cylinder wall of the closed end of the cylinder until the clamping part is clamped in the joint groove on the joint to be connected of the pipe to be connected. At the same time, the bottom end of the upper umbilical cable extends to the connection between the joint to be connected and the pipe to be connected, and is inserted downward into the lower umbilical cable hole of the plug-in part, and is connected with the top end of the lower umbilical cable, so that the upper umbilical cable on the working ship and the lower umbilical cable of the power drive module are connected into a long umbilical cable; In the process of inserting the bottom end of the upper umbilical cable downward into the lower umbilical cable hole of the plug-in part, the plug-in part is subjected to the downward pressure of the bottom end of the upper umbilical cable, gradually freed from the restraint of the torsion spring, and finally the plug-in part is separated from the inner wall of the pipeline to be connected, so that the long umbilical cable can move forward freely; The unblocking mechanism runs to the blocking point of the submarine pipeline: the two driving motors of the power driving module are started at the same time, driving the monitoring drainage module and the drilling liquid injection module to run in the cylinder and the submarine pipeline until the drill bit of the drilling liquid injection module touches the blocking point in the submarine pipeline; Drilling and spraying operations are performed on the blockage points: the drilling and spraying module performs drilling and spraying operations on the blockage points in the submarine pipeline, while the camera of the monitoring and drainage module monitors the unblocking status of the blockage point in front and the suction pump of the monitoring and drainage module is started, and the suction pipe absorbs the waste liquid formed in the unblocking process until the monitoring and drainage module monitors that the blockage point is completely cleared; The unblocking mechanism returns to the cylinder: the two driving motors of the power drive module are started in reverse at the same time, pulling the monitoring drainage module and the drilling injection module to run in reverse in the cylinder and the submarine pipeline until they return to the cylinder.

[0031] Wherein, after the drill bit of the drilling fluid injection module touches the blockage point in the submarine pipeline, starting the drilling fluid injection operation on the blockage point includes the following steps: When the drill bit encounters a blockage point, the blockage point prevents the drill bit from continuing to move forward, and the third connecting block will continue to move forward due to inertia, and the two will produce relative displacement, the touch switch collides with the tail end of the drill rod, and at the same time, the third connecting block compresses the fourth spring, and the touch switch enters a closed state from an open state, and the closed loop for the power supply to the drilling motor and the jet pump is closed, and the drilling motor and the jet pump are started at the same time. On the one hand, the drilling motor drives the drill bit through the drill rod to start the drilling operation; on the other hand, the jet pump sucks the agent in the deblocking agent bin into the nozzle, and the nozzle sprays the agent forward.

[0032] Compared with the prior art, the present invention has the following beneficial effects: (I) The present invention provides a quick connector. During the process of docking with a pipe to be connected, the clamping part is clamped in the joint groove on the joint to be connected. At the same time, the bottom end of the upper umbilical cable extends into the connection between the joint to be connected and the pipe to be connected, and is inserted downward into the lower umbilical cable hole of the plug-in part, and docks with the top end of the lower umbilical cable to form a long umbilical cable. After the quick connector is docked with the pipe to be connected, the sealing performance is good, and the quick connector is particularly suitable for the quick docking of pipes with high sealing requirements under submarine conditions.

[0033] (ii) The present invention provides an emergency unblocking system for submarine pipelines, comprising a cylinder, one end of which is an open end for docking with an interface of an underwater launching point device of an underwater manifold; the other end of the cylinder is a closed end, and a waterproof casing is docked at the cylinder wall of the cylinder near the closed end through a quick connector, and a power drive module, a monitoring and drainage module and a drilling and spraying module are sequentially arranged inside the cylinder from the closed end to the open end, wherein the power drive module provides power for the unblocking mechanism to operate in the cylinder and the submarine pipeline, and actively runs to the blockage point; the drilling and spraying module performs drilling and spraying operations on the blockage point in the submarine pipeline, and mechanically breaks the blockage point; the monitoring and drainage module monitors the unblocking status of the blockage point in front and absorbs the waste liquid sprayed during the unblocking process.

[0034] (III) The present invention provides an emergency unblocking system for submarine pipelines, which also includes an automatic drilling and spraying mechanism, wherein the initial state of the touch switch is a disconnected state. When the drill bit encounters a blockage point, it resists the continued advancement of the drill bit, and the third connecting block will continue to move forward due to inertia, and the two will produce relative displacement, the touch switch collides with the tail end of the drill rod, and at the same time, the third connecting block compresses the fourth spring, and the touch switch enters a closed state from an disconnected state, and the closed loop for powering the drilling motor and the jet pump is closed, and the drilling motor and the jet pump are started at the same time. On the one hand, the drilling motor drives the drill bit through the drill rod to start the drilling operation; on the other hand, the jet pump sucks the agent in the unblocking agent bin into the spray head, and the spray head sprays the agent forward to start the spraying operation.

[0035] (IV) The present invention provides a method for emergency unblocking of submarine pipelines, comprising: docking with an underwater manifold; docking of an upper umbilical cable with a lower umbilical cable, so that a reagent can flow from the ground to the blockage point; an unblocking mechanism runs to the blockage point of the submarine pipeline and can accurately find and transport it to the blockage point; drilling and spraying operations are performed on the blockage point until the blockage point is completely cleared; the unblocking mechanism returns to the cylinder. The method for emergency unblocking of submarine pipelines provided by the present invention integrates multiple functions such as automatic operation, drilling operations, injection of reagents and spraying operations, has the advantages of rapid unblocking and low energy consumption, and is particularly suitable for unblocking pipelines in deep-water submarine pipelines where inhibitors are difficult to reach the blockage point. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of the quick connector provided by Embodiment 1 of the present invention before being connected to the pipe to be connected; Figure 2 A schematic diagram of the structure of the quick connector provided by Embodiment 1 of the present invention after being connected to the pipe to be connected; Figure 3 A cross-sectional view of the longitudinal section of the submarine pipeline emergency unblocking system provided in Example 2 of the present invention; Figure 4 A schematic diagram of the structure of a power drive module provided in Embodiment 2 of the present invention; Figure 5 A schematic structural diagram of a cross section of a lower umbilical cable provided in Embodiment 2 of the present invention; Figure 6 A schematic diagram of the structure of a monitoring and drainage module provided in Example 2 of the present invention; Figure 7 A schematic diagram of the structure of a drilling fluid injection module provided in Example 2 of the present invention; Figure 8 A schematic diagram of the structure of an automatic drilling fluid injection mechanism provided in Example 2 of the present invention; Fig. 9 A circuit diagram of the automatic drilling fluid injection mechanism provided in Example 2 of the present invention; Fig.10 This is an application scenario diagram of the submarine pipeline emergency unblocking system provided in Example 3 of the present invention.

[0037] Description of reference numerals: 100 - pipe to be connected, 101 - joint to be connected, 102 - joint groove; 1-quick connector, 11-clamping part, 111-wedge block, 112-first spring, 113-sealing ring, 114-connector bolt, 115-flange baffle, 116-top pin, 117-pressing plate, 118-sealing pad, 119-second spring; 12-plug-in part, 121-torsion spring, 122-buckle, 123-clamping bead, 124-sliding bead; 21-upper umbilical cable, 22-lower umbilical cable, 23-main connecting rod, 201-liquid injection pipe, 202-liquid return pipe, 203-signal cable, 204-power supply cable; 3- Waterproof casing; 4- underwater manifold, 40- underwater ball-serving point device interface, 41- first switching valve, 42- second switching valve; 50-cylinder, 500-quick flange; 6-power drive module, 60-first connecting block, 61-driving motor, 62-first connecting rod, 63-roller, 64-third spring; 7- monitoring and draining module, 70- second connecting block, 700- pipette, 71- second connecting rod; 8-drilling spray module, 80-third connecting block, 81-third connecting rod; 90-drill bit, 91-drilling motor, 911-driving gear, 92-drill rod, 920-limiting ring, 921-fourth spring, 922-driven gear; 93-touch switch, 94-power supply, 95-jet pump, 96-spray head. DETAILED DESCRIPTION

[0038] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0039] In order to solve the problem that there is no fast and safe method to unblock the blockage point in the submarine pipeline between the wellhead and the platform, firstly, the present invention designs a quick connector, which is particularly suitable for the rapid docking of pipelines with high sealing requirements under submarine conditions; secondly, the present invention discloses a submarine pipeline emergency unblocking system, in which the power drive module can transport the unblocking mechanism to the blockage point; the drilling and spraying module drills and sprays the blockage point in the submarine pipeline to mechanically break the blockage point; the monitoring and drainage module monitors the unblocking status of the blockage point in front and absorbs the waste liquid sprayed during the unblocking process. Among them, the present invention also discloses an automatic drilling and spraying mechanism, which can automatically identify the blockage point, and automatically drill and spray the blockage point to clear the blockage point. Finally, the unblocking mechanism involved in unblocking can also return to the cylinder and will not be left in the submarine pipeline.

[0040] Example 1: A quick connector Embodiment 1 of the present invention provides a quick connector for docking with a pipe 100 to be connected. The structure is described in detail below with reference to the accompanying drawings.

[0041] refer to Figure 1 and Figure 2 The outer wall of the pipe to be connected 100 is provided with a joint 101 to be connected, the joint 101 to be connected is communicated with the pipe to be connected 100, and a joint groove 102 is provided on the joint 101. As a specific embodiment, the pipe to be connected 100 can be a cylinder 50.

[0042] The quick connector 1 is divided into two parts, one part is a clamping part 11, and the other part is a plug-in part 12. An upper umbilical cable 21 is inserted into the clamping portion 11, and the bottom end of the upper umbilical cable 21 extends out of the clamping portion 11; The plug-in portion 12 is provided with a lower umbilical cable hole, in which a lower umbilical cable 22 is fixed, and the plug-in portion 12 is temporarily arranged on the inner wall of the pipeline 100 to be connected which is connected to the joint 101 to be connected via a torsion spring 121; When the quick connector is docked with the pipe to be connected 100, the clamping portion 11 is clamped in the joint groove 102 on the joint to be connected 101. At the same time, the bottom end of the upper umbilical cable 21 extends into the connection between the joint to be connected 101 and the pipe to be connected 100, and is inserted downward into the lower umbilical cable hole of the plug-in portion 12, docking with the top end of the lower umbilical cable 22 to form a long umbilical cable; In the process of inserting the bottom end of the upper umbilical cable 21 downward into the lower umbilical cable hole of the plug-in portion 12, the plug-in portion 12 is subjected to the downward pressure of the bottom end of the upper umbilical cable 21, gradually frees itself from the restraint of the torsion spring 121, and finally the plug-in portion 12 is detached from the inner wall of the pipe 100 to be connected.

[0043] Specifically, an upper umbilical cable hole is provided in the clamping portion 11 , and after the bottom end of the upper umbilical cable 21 extends out of the clamping portion 11 , the upper umbilical cable 21 is inserted into the upper umbilical cable hole.

[0044] Specifically, the bottom end of the upper umbilical cable 21 serves as a male head, and the lower umbilical cable hole of the plug-in portion 12 serves as a female head. When the bottom end of the upper umbilical cable 21 is inserted into the lower umbilical cable hole of the plug-in portion 12, the bottom end of the upper umbilical cable 21 is connected to the top end of the lower umbilical cable 22.

[0045] In order to facilitate the insertion of the upper umbilical cable 21 downward into the lower umbilical cable hole of the plug-in part 12 and to assist in positioning, a plurality of retaining beads 123 are evenly arranged along the circumferential direction on the hole wall of the lower umbilical cable hole of the plug-in part 12. When the bottom end of the upper umbilical cable 21 is inserted into the lower umbilical cable hole of the plug-in part 12, the retaining beads 123 increase the connection and fixation between the two.

[0046] The plug-in portion 12 detached from the inner wall of the pipeline 100 to be connected can prevent the lower umbilical cable 22 from returning to enter the interior of the pipeline 100 to be connected.

[0047] As a specific implementation method for realizing the clamping connection between the clamping portion 11 and the joint groove 102, the joint 101 to be connected first protrudes toward the outer side of the pipe 100 to be connected, and then a flange is formed from the outer edge of the protrusion toward the periphery, and the joint groove 102 is formed on the flange, and the inner edge of the joint groove 102 is set as an inclined surface; At least two wedge blocks 111 are disposed at the bottom of the clamping portion 11, and each wedge block 111 is configured with a first spring 112; The inclined surface of the inner edge of the joint groove 102 is facing upward, and the outer end of the wedge block 111 is set as an inclined surface and the inclined surface of the wedge block 111 is facing downward; When the quick connector is docked with the pipe 100 to be connected, the inclined surface of the wedge block 111 of the clamping portion 11 slides along the inclined surface of the inner edge of the joint groove 102 until the wedge block 111 of the clamping portion 11 is clamped in the joint groove 102 .

[0048] In order to ensure the sealing performance of the clamping portion 11 and the joint groove 102 after being clamped together, a sealing ring 113 is provided on the contact surface between the bottom of the clamping portion 11 and the joint groove 102 .

[0049] In order to be suitable for the application environment of marine engineering, the top of the clamping portion 11 is butted against a waterproof casing 3 , and the upper umbilical cable 21 is inserted into the waterproof casing 3 .

[0050] As a specific method for achieving docking between the water-blocking sleeve 3 and the clamping part 11, a joint bolt 114 is provided on the top of the clamping part 11, and the top end of the joint bolt 114 protrudes outward to form a flange baffle 115. A plurality of top pins 116 are provided on the top surface of the clamping part 11, and a plurality of top pin holes are correspondingly provided on the outer edge of the flange baffle 115; a pressure plate 117 is provided at the bottom end of the interior of the water-blocking sleeve 3, and a sealing gasket 118 is provided at the connection between the pressure plate 117 and the flange baffle 115. , the sealing gasket 118 is in a compressed state and presses the upper umbilical cable 21 to prevent seawater from flowing into the waterproof casing 3; in the process that the inclined surface of the wedge block 111 of the clamping part 11 slides from the inclined surface of the inner edge of the joint groove 102, the top pin 116 extends into the top pin hole corresponding to the flange baffle 115, propping up the pressure plate 117, and at the same time, the sealing gasket 118 in a compressed state is stretched, and the state of the sealing gasket 118 pressing the upper umbilical cable 21 is released.

[0051] In order to compress the sealing gasket 118 and keep the sealing gasket 118 pressing the upper umbilical cable 21 , a second spring 119 is provided in the gap between the flange baffle 115 and the pressure plate 117 and away from the sealing gasket 118 , that is, the pressure plate 117 pre-tightens and compresses the sealing gasket 118 through the second spring 119 .

[0052] As a specific implementation method for connecting the plug-in part 12 with the joint to be connected 101, one end of the torsion spring 121 of the plug-in part 12 is fixed on the inner wall of the pipe 100 to be connected, and the other end is provided with a buckle 122. Clip eyes are respectively provided on both sides of the plug-in part 12, and the clips 122 are hung on the corresponding clip eyes, thereby realizing that the plug-in part 12 is temporarily set on the inner wall of the pipe 100 to be connected which is connected to the joint to be connected 101 through the torsion spring 121.

[0053] Furthermore, a plurality of sliding beads 124 are evenly arranged along the circumferential direction on the outer wall of the plug-in portion 12 .

[0054] Example 2: A submarine pipeline emergency unblocking system Embodiment 2 of the present invention provides an emergency unblocking system for submarine pipelines, which is used on an underwater manifold 4. The underwater manifold 4 is connected to the wellhead and the platform through submarine pipelines respectively, and the underwater manifold 4 is provided with an underwater launching point device interface 40. The underwater launching device interface 40 is a pipe with an open end, and the closed end is connected to the underwater manifold 4. There is a flange on the open end for connecting to an external pipeline. Its structure is described in detail below with reference to the accompanying drawings.

[0055] refer to Figure 3 and Fig.10 The submarine pipeline emergency unblocking system includes a cylinder 50, one end of which is an open end for docking with the underwater launching point device interface 40 of the underwater manifold 4; the other end of the cylinder 50 is a closed end, and the cylinder 50 is used as the pipeline 100 to be connected. The quick connector 1 of Example 1 is arranged on the cylinder wall of the cylinder 50 near the closed end, and the clamping part 11 of the quick connector 1 is docked with the working ship on the sea surface through the waterproof casing 3; The cylinder 50 is provided with a power drive module 6 and a drilling fluid injection module 8 in sequence from the closed end to the open end. The lower umbilical cable 22 of the plug-in portion 12 of the quick connector 1 passes through the power drive module 6 and the drilling fluid injection module 8 in sequence from the back to the front. The power drive module 6 and the drilling fluid injection module 8 are connected together to form a blockage-releasing mechanism. The power drive module 6 is equipped with a motor, which can provide power for the drilling fluid injection module 8 to operate in the cylinder 50 and the submarine pipeline. The power drive module 6 is used to push the drilling fluid injection module 8 to the blockage point in the submarine pipeline. The drilling fluid injection module 8 includes a drilling motor 91 , and the drilling motor 91 is equipped with a drill bit 90 for performing unblocking operations on the blocked points.

[0056] Specifically, the outer edge of the open end of the cylinder 50 protrudes outward to form a flange, and a flange hole is provided on the flange. The open end of the cylinder 50 is connected to the underwater launching point device interface 40 of the underwater manifold 4 through a quick flange 500.

[0057] Specifically, the underwater manifold 4 includes a wellhead interface, a platform interface and an underwater ball-starting point device interface 40, the wellhead interface is connected to the wellhead through a submarine pipeline, and the platform interface is connected to the platform through a submarine pipeline; A first switching valve 41 is provided on the pipeline between the platform interface and the wellhead interface, and a second switching valve 42 is provided on the pipeline between the platform interface and the underwater launching point device interface 40. By controlling the first switching valve and the second switching valve 42, the switching between the connection between the wellhead interface and the platform interface and the connection between the underwater launching point device interface 40 and the platform interface can be achieved.

[0058] refer to Figure 4 The power drive module 6 includes a first connection block 60, two drive motors 61, four first connection rods 62 and a first controller. Two driving motors 61 are respectively arranged at the upper and lower positions behind the first connecting block 60, and four secondary connecting rods 62 are respectively arranged in front of and on both sides of the first connecting block 60, wherein the upper and lower parts of the front of the first connecting block 60 are respectively hinged with a primary connecting rod 62, and the left and right sides of the first connecting block 60 are respectively hinged with a primary connecting rod 62; The output shaft of each driving motor 61 and the bottom end of each first connecting rod 62 are respectively provided with a roller 63 , and the six rollers 63 are symmetrically distributed along the longitudinal center line of the cylinder 50 , and each roller 63 of the first connecting rod 62 abuts against the inner wall of the cylinder 50 .

[0059] In order to press the roller 63 against the inner wall of the cylinder 50, a third spring 64 is respectively arranged at the housing of the driving motor 61 and the junction of the first connecting rod 62 and the first connecting block 60, and the third spring 64 presses the roller 63 against the inner wall of the cylinder 50 by pre-tightening.

[0060] In order to ensure that the roller 63 can be pressed against the inner wall of the submarine pipeline after the unblocking mechanism runs from the cylinder 50 into the submarine pipeline, the inner diameter of the cylinder 50 and the inner diameter of the underwater manifold 4 are equal to the inner diameter of the submarine pipeline connected to the platform through the underwater manifold 4.

[0061] refer to Figure 5The upper umbilical cable 21 and the lower umbilical cable 22 are both wrapped with a liquid injection pipe 201, a liquid return pipe 202, a signal cable 203 and a power supply cable 204. The drilling liquid injection module 8 includes a nozzle 96, and the nozzle 96 is located above the drill bit 90, and the injection pipe 201 is connected to the nozzle 96 of the drilling liquid injection module 8. The injection pipe 201 is used to transport the agent from the workboat to the drilling liquid injection module 8 of the unblocking mechanism, so that the nozzle 96 can spray the agent.

[0062] In order to absorb the waste liquid sprayed out during the unblocking process, the unblocking mechanism also includes a monitoring and drainage module 7. The power drive module 6, the monitoring and drainage module 7 and the drilling spray module 8 are arranged in sequence inside the cylinder 50 from the closed end to the open end of the cylinder 50.

[0063] refer to Figure 6 The monitoring and drainage module 7 includes a second connecting block 70, in which a temporary liquid storage tank is arranged, the temporary liquid storage tank is provided with a suction pump, and the temporary liquid storage tank is equipped with a suction pipe 700, and the liquid inlet of the suction pipe 700 faces the lower part of the inner wall of the cylinder 50 or the submarine pipeline.

[0064] In order to recycle the waste liquid in the monitoring and drainage module 7, a return pipe 202 is also wrapped in the lower umbilical cable 22, and the return pipe 202 is connected to the temporary liquid storage tank of the monitoring and drainage module 7. The return pipe 202 is used to recycle the waste liquid in the temporary liquid storage tank of the monitoring and drainage module 7 to the workboat.

[0065] As a specific implementation method for arranging the power drive module 6, the monitoring and drainage module 7 and the drilling spray module 8 in sequence from the closed end to the open end of the cylinder 50, the power drive module 6, the monitoring and drainage module 7 and the drilling spray module 8 are respectively provided with a main connecting rod 23, and the power drive module 6 and the monitoring and drainage module 7 and the monitoring and drainage module 7 and the drilling spray module 8 are hinged through the main connecting rod 23, and the power drive module 6, the monitoring and drainage module 7 and the drilling spray module 8 are connected in series to form the unblocking mechanism.

[0066] Continue to refer Figure 3Specifically, a main connecting rod 23 is provided at the right end of the power drive module 6, main connecting rods 23 are respectively provided at the left and right ends of the monitoring and drainage module 7, and a main connecting rod 23 is provided at the left end of the drilling spray module 8. The main connecting rod 23 at the right end of the power drive module 6 is hinged to the main connecting rod 23 at the left end of the monitoring and drainage module 7, and the main connecting rods 23 at the right ends of the monitoring and drainage module 7 are hinged to the main connecting rod 23 at the left end of the drilling spray module 8, thereby realizing that the power drive module 6, the monitoring and drainage module 7 and the drilling spray module 8 are connected in series to form the unblocking mechanism.

[0067] The lower umbilical cable 22 of the plug-in portion 12 of the quick connector 1 passes through the power drive module 6, the monitoring and drainage module 7 and the drilling spray module 8 from back to front in sequence, and the injection pipe 201 is connected to the nozzle 96 of the drilling spray module 8; the return pipe 202 is connected to the temporary liquid storage tank of the monitoring and drainage module 7.

[0068] In order to realize that the monitoring and drainage module 7 can be driven by the power driving module 6 to run in the cylinder 50 and the submarine pipeline, continue to refer to Figure 6 The monitoring and drainage module 7 further includes six secondary connecting rods 71, which are respectively hinged on the second connecting block 70, wherein the upper and lower parts of the front of the second connecting block 70 are respectively hinged with a secondary connecting rod 71, the upper and lower parts of the rear of the second connecting block 70 are respectively hinged with a secondary connecting rod 71, and the left and right sides of the second connecting block 70 are respectively hinged with a secondary connecting rod 71; A roller 63 is disposed at the bottom end of each of the secondary connecting rods 71. The rollers 63 of the six secondary connecting rods 71 ​​are symmetrically distributed along the longitudinal center line of the cylinder 50, and each roller 63 of the secondary connecting rods 71 ​​abuts against the inner wall of the cylinder 50. A third spring 64 is disposed at the junction of the second connecting rod 71 and the second connecting block 70 . The third spring 64 presses the roller 63 against the inner wall of the cylinder 50 by pre-tightening.

[0069] In order to monitor the unblocking status of the blocking point ahead during operation, continue to refer to Figure 6 The monitoring and drainage module 7 also includes a camera 72, and the camera 72 is equipped with a lighting lamp. The camera 72 and the lighting lamp are integrated above the second connecting block 70, and the camera 72 and the lighting lamp face the front of the second connecting block 70.

[0070] Similarly, in order to realize that the drilling fluid injection module 8 can be driven and operated in the cylinder 50 and the submarine pipeline under the drive of the power drive module 6, refer to Figure 7The drilling fluid injection module 8 further includes a third connection block 80 and six third connection rods 81. Six third connecting rods 81 are respectively hinged on the third connecting block 80, wherein the upper and lower parts of the front of the third connecting block 80 are respectively hinged with a third connecting rod 81, the upper and lower parts of the rear of the third connecting block 80 are respectively hinged with a third connecting rod 81, and the left and right sides of the third connecting block 80 are respectively hinged with a third connecting rod 81; A roller 63 is disposed at the bottom end of each of the third connecting rods 81. The rollers 63 of the six third connecting rods 81 are symmetrically distributed along the longitudinal center line of the cylinder 50, and each roller 63 of the third connecting rod 81 abuts against the inner wall of the cylinder 50. A third spring 64 is disposed at the junction of the third connecting rod 81 and the third connecting block 80 . The third spring 64 presses the roller 63 against the inner wall of the cylinder 50 by pre-tightening.

[0071] In order to dissolve the blockage, as a preferred embodiment for the drilling spray module 8 to drill and spray the blockage point, a deblocking agent bin is provided in the third connecting block 80, and deblocking agents are provided in the deblocking agent bin, and the injection pipe 201 of the lower umbilical cable 22 is connected to the deblocking agent bin of the drilling spray module 8.

[0072] refer to Figure 8 and Fig. 9 The drilling liquid injection module 8 also includes an automatic drilling liquid injection mechanism, which includes the drill bit 90, the drilling motor 91, the drill rod 92, the touch switch 93, the power supply 94, the jet pump 95 and the nozzle 96. The drill rod 92 is provided with a limiting ring 920, the drill rod 92 is passed through the third connecting block 80, and the limiting ring 920 of the drill rod 92 abuts against the inner side of the third connecting block 80, and the front end of the drill rod 92 extends out of the third connecting block 80; The drill bit 90 is fixed at the front end of the drill rod 92, and the drill bit 90 is located right in front of the third connecting block 80, and a fourth spring 921 is sandwiched between the drill bit 90 and the outer wall of the third connecting block 80; The touch switch 93 is disposed near the rear end of the drill rod 92; The nozzle 96 is arranged directly above the drill bit 90 and the nozzle of the nozzle 96 is inclined upwards. The jet pump 95 is arranged in the unblocking agent bin, and the jet pump 95 is connected to the nozzle 96 through a pipeline. The output shaft of the drilling motor 91 is provided with a driving gear 911, and the drill rod 92 is provided with a driven gear 922, and the driving gear 911 is meshed with the driven gear 922; The power source 94, the drilling motor 91, the touch switch 93 and the jet pump 95 are connected in sequence through wires to form a closed loop in series.

[0073] The initial state of the touch switch 93 is the disconnected state. When the drill bit 90 encounters a blockage point, the drill bit 90 is prevented from continuing to move forward, and the third connecting block 80 continues to move forward due to inertia. The two generate relative displacement, and the touch switch 93 collides with the tail end of the drill rod 92. At the same time, the third connecting block 80 compresses the fourth spring 921. Figure 8 As shown, the touch switch 93 changes from an open state to a closed state, and the closed loop of the power supply 94 supplying power to the drilling motor 91 and the jet pump 95 is closed. Fig. 9 As shown, the drilling motor 91 and the jet pump 95 are started simultaneously. On the one hand, the drilling motor 91 drives the drill bit 90 through the drill rod 92 to start the drilling operation; on the other hand, the jet pump 95 sucks the agent in the deblocking agent bin into the nozzle 96, and the nozzle 96 sprays the agent forward to start the liquid spraying operation.

[0074] Preferably, a guide groove is formed on the drill bit 90 .

[0075] The power drive module 6 is used to provide power for the unblocking mechanism to operate in the cylinder 50 and the submarine pipeline, and actively operate to the blockage point; The drilling and spraying module 8 is used to perform drilling and spraying operations on the blockage points in the submarine pipeline to mechanically break the blockage points; The monitoring and drainage module 7 is used to monitor the unblocking status of the blockage point ahead and to recover the waste liquid generated during the unblocking process.

[0076] In order to transmit the operation status of the unblocking mechanism in the cylinder 50 and the submarine pipeline to the workboat, the power drive module 6 is configured with a first controller, and the first controller is connected to the two drive motors 61 by wires respectively; the monitoring and drainage module 7 is configured with a second controller, and the second controller is connected to the suction pump, the camera 72, and the lighting lamp by wires; the drilling and injection module 8 is configured with a third controller, and the third controller is connected to the drilling motor 91, the jet pump 95, the power supply 94 and the touch switch 93 by wires; the first controller, the second controller and the third controller are respectively connected to the signal cable 203 in the lower umbilical cable 22.

[0077] In order to ensure power supply to the electrical equipment of the unblocking mechanism, the power-consuming equipment in the power drive module 6 , the monitoring drainage module 7 and the drilling injection module 8 are respectively connected to the power supply cable 204 in the lower umbilical cable 22 .

[0078] Example 3: A method for emergency unblocking of submarine pipelines Embodiment 3 of the present invention provides a method for emergency unblocking of a submarine pipeline, using the submarine pipeline emergency unblocking system provided in Embodiment 2, wherein a working vessel on the sea surface pre-lowers the submarine pipeline emergency unblocking system to the vicinity of the underwater launching point device interface 40 of the underwater manifold 4, with reference to Fig.10 , the method comprises the following steps: Docking with underwater manifold: Once the submarine pipeline is blocked, the underwater robot docks the open end of the cylinder 50 of the submarine pipeline emergency unblocking system with the underwater launching point device interface 40 of the underwater manifold 4 through the quick flange 500; Docking of the upper umbilical cable with the lower umbilical cable: the pipe mouth of the watertight casing 3 on the working vessel on the sea is docked with the clamping part 11 of the quick connector 1, the working vessel lowers the watertight casing 3, and uses the cylinder 50 as the pipeline 100 to be connected, so that the clamping part 11 of the quick connector 1 is close to the cylinder wall of the closed end of the cylinder 50, until the clamping part 11 is clamped in the joint groove 102 on the joint 101 to be connected of the pipeline 100 to be connected, at the same time, the bottom end of the upper umbilical cable 21 extends to the connection between the joint 101 to be connected and the pipeline 100 to be connected, and is inserted downward into the lower umbilical cable hole of the plug-in part 12, and docked with the top end of the lower umbilical cable 22, so that the upper umbilical cable 21 on the working vessel and the lower umbilical cable 22 of the power drive module 6 are connected into a long umbilical cable; In the process of inserting the bottom end of the upper umbilical cable 21 downward into the lower umbilical cable hole of the plug-in portion 12, the plug-in portion 12 is subjected to the downward pressure of the bottom end of the upper umbilical cable 21, gradually freed from the restraint of the torsion spring 121, and finally the plug-in portion 12 is separated from the inner wall of the pipeline 100 to be connected, so that the long umbilical cable can move forward freely; The unblocking mechanism runs to the blocking point of the submarine pipeline: the two driving motors 61 of the power driving module 6 are started at the same time, driving the monitoring and drainage module 7 and the drilling and spraying module 8 to run in the cylinder 50 and the submarine pipeline until the drill bit 90 of the drilling and spraying module 8 touches the blocking point in the submarine pipeline; Drilling and spraying operations are performed on the blocked points: the drilling and spraying module 8 performs drilling and spraying operations on the blocked points in the submarine pipeline, while the camera 72 of the monitoring and drainage module 7 monitors the unblocking status of the blocked points in front and the suction pump of the monitoring and drainage module 7 is started, and the suction pipe 700 recovers the waste liquid sprayed during the unblocking process until the monitoring and drainage module 7 monitors that the blocked points are completely cleared; The unblocking mechanism returns to the cylinder: the two drive motors 61 of the power drive module 6 are simultaneously started in reverse, pulling the monitoring drainage module 7 and the drilling injection module 8 to run in reverse in the cylinder 50 and the submarine pipeline until they return to the cylinder 50.

[0079] The initial state of the touch switch 93 is the off state, wherein, after the drill bit 90 of the drilling fluid injection module 8 touches the blockage point in the submarine pipeline, starting the drilling fluid injection operation on the blockage point includes the following steps: When the drill bit 90 encounters a blockage point, the blockage point prevents the drill bit 90 from continuing to move forward, and the third connecting block 80 will continue to move forward due to inertia, and the two will produce relative displacement, the touch switch 93 collides with the tail end of the drill rod 92, and at the same time, the third connecting block 80 compresses the fourth spring 921, and the touch switch 93 enters a closed state from an open state, and the closed loop for the power supply 94 to supply power to the drilling motor 91 and the jet pump 95 is closed, and the drilling motor 91 and the jet pump 95 are started at the same time. On the one hand, the drilling motor 91 drives the drill bit 90 through the drill rod 92 to start the drilling operation; on the other hand, the jet pump 95 sucks the agent in the deblocking agent bin into the nozzle 96, and the nozzle 96 sprays the agent forward to start the liquid spraying operation.

[0080] Specifically, an underwater robot (ROV) connects the open end of the cylinder 50 of the submarine pipeline emergency unblocking system with the underwater launching point device interface 40 of the underwater manifold 4 through a quick flange 500.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A submarine pipeline emergency unblocking system capable of rapid sealing docking, used on an underwater manifold (4), wherein the underwater manifold (4) is docked with a wellhead and a platform respectively through submarine pipelines, and an underwater launching point device interface (40) is arranged on the underwater manifold (4), characterized in that: It comprises a cylinder (50) and a quick connector (1); One end of the cylinder (50) is an open end, used for docking with an underwater ball-launching point device interface (40) of an underwater manifold (4); the other end of the cylinder (50) is a closed end, and the quick connector (1) is arranged on the cylinder wall of the cylinder (50) near the closed end; The quick connector (1) comprises a clamping portion (11) and a plug-in portion (12), an upper umbilical cable (21) being inserted into the clamping portion (11), the clamping portion (11) of the quick connector (1) being docked with a working vessel on the sea surface via a watertight casing (3), and a lower umbilical cable (22) being arranged in the plug-in portion (12); A power drive module (6) and a drilling fluid injection module (8) are sequentially arranged inside the cylinder (50) from the closed end to the open end, and the lower umbilical cable (22) of the plug-in portion (12) of the quick connector (1) passes through the power drive module (6) and the drilling fluid injection module (8) sequentially from the back to the front, and the power drive module (6) and the drilling fluid injection module (8) are connected together to form a blockage removal mechanism; Wherein, the quick connector (1) is used to connect the upper umbilical cable (12) and the lower umbilical cable (22); The power drive module (6) is used to push the drilling fluid injection module (8) to a blockage point in the seabed pipeline; The drilling fluid injection module (8) comprises a drill bit (90) for performing unblocking operations on the blockage point.

2. The submarine pipeline emergency unblocking system according to claim 1 is characterized in that: The underwater manifold (4) further comprises a wellhead interface and a platform interface, wherein the wellhead interface is connected to the wellhead via a submarine pipeline, and the platform interface is connected to the platform via a submarine pipeline; A first switching valve (41) is provided on the pipeline between the platform interface and the wellhead interface, and a second switching valve (42) is provided on the pipeline between the platform interface and the underwater ball-launching point device interface (40). By controlling the first switching valve (41) and the second switching valve (42), switching of the connection between the wellhead interface and the platform interface and switching of the connection between the underwater ball-launching point device interface (40) and the platform interface can be achieved.

3. The submarine pipeline emergency unblocking system according to claim 1, characterized in that: The cylinder (50) is provided with a joint (101) to be connected, and the joint (101) is provided with a joint groove (102); The plug-in portion (12) is temporarily bound in advance on the inner wall of the cylinder (50); When the quick connector (1) is docked with the cylinder (50), the clamping portion (11) is clamped into the joint groove (102) on the cylinder (50). At the same time, the bottom end of the upper umbilical cable (21) extends into the connection between the to-be-connected joint and the cylinder (50), is inserted downward into the lower umbilical cable hole of the plug-in portion (12), and docks with the top end of the lower umbilical cable (22) to form a long umbilical cable; In the process of inserting the bottom end of the upper umbilical cable (21) downward into the lower umbilical cable hole of the plug-in portion (12), the plug-in portion (12) is subjected to the downward pressure of the bottom end of the upper umbilical cable (21), gradually frees itself from temporary restraint, and finally the plug-in portion (12) is detached from the inner wall of the pipeline to be connected (100).

4. The submarine pipeline emergency unblocking system according to claim 3 is characterized in that: The joint (101) to be connected first protrudes toward the outside of the pipe (100) to be connected, and then a flange is formed from the protruding outer edge toward the periphery, and the joint groove (102) is formed on the flange, and the inner edge of the joint groove (102) is set as an inclined surface; At least two wedge blocks (111) are provided at the bottom of the clamping portion (11), and each wedge block (111) is equipped with a first spring (112); The inclined surface of the inner edge of the joint groove (102) is directed upwards, and the outer end of the wedge block (111) is arranged as an inclined surface, and the inclined surface of the wedge block (111) is directed downwards; When the quick connector is docked with the pipe (100) to be connected, the inclined surface of the wedge-shaped block (111) of the clamping portion (11) slides along the inclined surface of the inner edge of the joint groove (102) until the wedge-shaped block (111) of the clamping portion (11) completes the clamping connection in the joint groove (102); The top of the clamping portion (11) is butt-jointed with a waterproof casing (3), and the upper umbilical cable (21) is inserted into the waterproof casing (3).

5. The submarine pipeline emergency unblocking system according to claim 4 is characterized in that: A joint bolt (114) is provided at the top of the clamping portion (11), and the top end of the joint bolt (114) protrudes outward to form a flange baffle (115). A plurality of ejector pins (116) are provided on the top surface of the clamping portion (11), and a plurality of ejector pin holes are respectively provided on the outer edge of the flange baffle (115); A pressure plate (117) is provided at the bottom end of the interior of the watertight casing (3); a sealing gasket (118) is provided at the connection between the pressure plate (117) and the flange baffle (115); the sealing gasket (118) is in a compressed state and presses the upper umbilical cable (21) to prevent seawater from flowing into the watertight casing (3); During the process of the inclined surface of the wedge block (111) of the clamping portion (11) sliding from the inclined surface of the inner edge of the joint groove (102), the top pin (116) extends into the top pin hole corresponding to the flange baffle (115), propping up the pressure plate (117), and at the same time, the sealing gasket (118) in a compressed state stretches out, thereby achieving the unsealing between the upper umbilical cable (21) and the sealing gasket (118); A second spring (119) is provided in a gap between the flange baffle (115) and the pressure plate (117) and away from the sealing gasket (118).

6. The submarine pipeline emergency unblocking system according to claim 5, characterized in that: The plug-in portion (12) is temporarily fastened to the inner wall of the pipe to be connected (100) which is connected to the joint (101) to be connected, via a torsion spring (121) and a buckle (122). One end of the torsion spring (121) is fixed to the inner wall of the pipe to be connected (100), and the other end is provided with a buckle (122). Buckles are respectively provided on both sides of the plug-in portion (12), and the buckle (122) is hung on the corresponding buckle eyes, thereby achieving the temporary restraint of the plug-in portion (12) on the inner wall of the pipe to be connected (100) connected to the joint (101).

7. The submarine pipeline emergency unblocking system according to claim 1, characterized in that: The power drive module (6) comprises a first connection block (60), two drive motors (61), and four first connection rods (62). Two driving motors (61) are respectively arranged at upper and lower positions behind the first connecting block (60), and four secondary connecting rods (62) are respectively arranged in front of and on both sides of the first connecting block (60), wherein a primary connecting rod (62) is respectively hingedly connected at the upper and lower positions in front of the first connecting block (60), and a primary connecting rod (62) is respectively hingedly connected at the left and right sides of the first connecting block (60); The output shaft of each driving motor (61) and the bottom end of each first connecting rod (62) are respectively provided with a roller (63), and the six rollers (63) are symmetrically distributed along the longitudinal center line of the cylinder (50); A third spring (64) is respectively disposed at the housing of the driving motor (61) and the joint between the first connecting rod (62) and the first connecting block (60), and the third spring (64) presses the roller (63) tightly and abuts against the inner wall of the cylinder (50) by pre-tightening.

8. The submarine pipeline emergency unblocking system according to claim 1, characterized in that: The lower umbilical cable (22) is wrapped with an injection pipe (201), the drilling injection module (8) comprises a nozzle (96), and the nozzle (96) is located above the drill bit (90), and the injection pipe (201) is connected to the nozzle (96) of the drilling injection module (8).

9. The submarine pipeline emergency unblocking system according to claim 8, characterized in that: The unblocking mechanism further comprises a monitoring and drainage module (7). The power drive module (6), the monitoring and drainage module (7) and the drilling fluid injection module (8) are sequentially arranged inside the cylinder (50) from the closed end to the open end of the cylinder (50); The monitoring and drainage module (7) comprises a second connection block (70), a temporary liquid storage bin is arranged in the second connection block (70), the temporary liquid storage bin is provided with a liquid suction pump, the temporary liquid storage bin is equipped with a liquid suction pipe (700), and the liquid inlet of the liquid suction pipe (700) faces the lower part of the inner wall of the cylinder (50) or the submarine pipeline; A liquid return pipe (202) is also wrapped inside the lower umbilical cable (22), and the liquid return pipe (202) is connected to the temporary liquid storage tank of the monitoring and drainage module (7); The monitoring and drainage module (7) further comprises a camera (72). The camera (72) is provided with a lighting lamp, and the camera (72) and the lighting lamp are integrated and arranged above the second connection block (70), and the camera and the lighting lamp face the front of the second connection block (70).

10. The submarine pipeline emergency unblocking system according to claim 8, characterized in that: The drilling fluid injection module (8) further comprises a third connection block (80) and six third connection rods (81). Six tertiary connecting rods (81) are respectively hinged on the third connecting block (80), wherein one tertiary connecting rod (81) is respectively hinged on the upper and lower parts of the front of the third connecting block (80), one tertiary connecting rod (81) is respectively hinged on the upper and lower parts of the rear of the third connecting block (80), and one tertiary connecting rod (81) is respectively hinged on the left and right sides of the third connecting block (80); A roller (63) is disposed at the bottom end of each of the third connecting rods (81), and the rollers (63) of the six third connecting rods (81) are symmetrically distributed along the longitudinal center line of the cylinder (50); A third spring (64) is disposed at the junction of the third connecting rod (81) and the third connecting block (80), and the third spring (64) presses the roller (63) tightly and abuts against the inner wall of the cylinder (50) by pre-tightening; The third connecting block (80) is provided with a deblocking agent bin, in which deblocking agents are provided, and the injection pipe (201) of the lower umbilical cable (22) is connected to the deblocking agent bin of the drilling injection module (8); The drilling fluid injection module (8) further comprises an automatic drilling fluid injection mechanism, wherein the automatic drilling fluid injection mechanism comprises the drill bit (90), the drilling motor (91), a drill rod (92), a touch switch (93), a power source (94), a jet pump (95) and the spray head (96). A limiting ring (920) is provided on the drill rod (92), the drill rod (92) is passed through the third connecting block (80), and the limiting ring (920) of the drill rod (92) abuts against the inner side of the third connecting block (80), and the front end of the drill rod (92) extends out of the third connecting block (80); The drill bit (90) is fixed to the front end of the drill rod (92), and the drill bit (90) is located directly in front of the third connecting block (80), and a fourth spring (921) is sandwiched between the drill bit (90) and the outer wall of the third connecting block (80); The touch switch (93) is arranged near the rear end of the drill rod (92); The spray head (96) is arranged directly above the drill bit (90) and the nozzle of the spray head (96) is inclined upwards; the jet pump (95) is arranged in the unblocking agent bin; the jet pump (95) is connected to the spray head (96) through a pipeline; A driving gear (911) is arranged on the output shaft of the drilling motor (91), a driven gear (922) is arranged on the drill rod (92), and the driving gear (911) is meshed with the driven gear (922); The power source (94), the drilling motor (91), the touch switch (93) and the jet pump (95) are connected in sequence via wires to form a closed loop.

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