CN219140122U

CN219140122U - Underwater connector system

Info

Publication number: CN219140122U
Application number: CN202320014741.XU
Authority: CN
Inventors: 周庆兵; 刘小山; 周庆涛; 周琳; 赵丽娟; 庞涛; 冯旺辉; 闫鹏宇; 周军民; 周席熙; 周念
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-06-06
Anticipated expiration: 2033-01-04

Abstract

The utility model relates to an underwater connector system, which comprises a base, a clamp fastening device, a first floating device and a second floating device, wherein the clamp fastening device is arranged on the base; the base comprises a main body square steel, a cylinder seat and a bell mouth which are welded on the main body square steel, and a guide block is welded on the main body square steel; the clamp fastening device comprises a first hollow shell in a cuboid shape, a lifting device, a clamp main body, a torque rod device and a connecting pin; the first floating device comprises a cuboid second hollow shell, a centralizer, an interface flange, a centering device and a positioning connecting plate; the second floating device comprises a third hollow shell in a cuboid shape, a positioning device, a centering spear and a hot stab. The device has lighter and smaller design and is optimized to reduce the assembly time, can be operated by an ROV, can realize the quick connection of a flat pipe and a flat pipe, solves the problem of inconvenient installation of a deep water pipeline, has good sealing effect, and is quick, safe and reliable.

Description

Underwater connector system

Technical Field

The utility model relates to the technical field of deep water pipeline installation, in particular to an underwater connector system which is mainly applied to quick connection of flat pipes in a deep water pipe network.

Background

A large amount of petroleum and natural gas resources are reserved in the ocean system of China, and along with the continuous development, the exploitation of the resources is also developed from the shallow water field to the deep water field, so that the construction difficulty is increased. The pipeline connection from the subsea tree to the PLET (pipeline termination) is typically flanged in shallow water (prior art) and operated by the diver. However, as the depth of water increases, the water pressure gradually increases beyond the limits of human pressure, and divers have not been able to construct under the water, but have been able to operate underwater using underwater Robots (ROVs). In the connection of flat pipes of a platform into deep water to flat pipes on the sea floor, if conventional flanges are used for connection, great difficulty is brought to ROV operation. And the time and labor are wasted, and the difficulty is great, and the technology can be realized only by a special technology, and the technology is always in a monopoly state abroad. The utility model is based on the above research background and aims to provide an underwater connector system for meeting the installation and use requirements of submarine deep water pipelines.

Disclosure of Invention

Aiming at the bottleneck of the installation of the deep water pipeline in the prior art, the utility model aims at: the underwater connector system has the characteristics of convenience in use and flexibility in operation, can be operated by an ROV, can realize quick concentricity and connection of a flat pipe and a flat pipe, solves the problem of inconvenient installation, greatly saves manpower and material resources, reduces installation time, has a good sealing effect, and is quick, safe and reliable.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an underwater connector system for underwater connection of pipes to be connected; the underwater connector comprises a base, a clamp fastening device, a first floating device and a second floating device, wherein the clamp fastening device is arranged on the base; the base comprises a main body square steel, a cylinder seat and a bell mouth, wherein the cylinder seat and the bell mouth are welded on the main body square steel, and a guide block for guiding and positioning the first floating device is welded on the main body square steel; the clamp fastening device comprises a cuboid first hollow shell, a lifting device welded at the top of the first hollow shell, a clamp main body positioned in the center of the first hollow shell and used for clamping a pipeline to be connected, a torque rod device for controlling the clamp main body to open and close, and a connecting pin positioned on the first hollow shell; the first floating device comprises a cuboid second hollow shell, a centralizer connected with the top of the second hollow shell through a bolt for positioning and an interface flange connected with a connecting pin in a clamping fit manner, centering devices with inner conical holes are symmetrically arranged on the left side and the right side of the bottom of the second hollow shell, positioning connecting plates are symmetrically arranged on the left side and the right side of the middle of the second hollow shell, and hydraulic cylinder positioning devices are arranged on the positioning connecting plates; the top of the hydraulic cylinder positioning device is connected with a hydraulic cylinder guide plate; the second floating device comprises a third hollow shell in a cuboid shape, a positioning device opposite to the horn mouth is arranged on the third hollow shell, the second floating device further comprises a centering spear matched with the centering device in shape, a thermal thorn is further arranged at the top of the third hollow shell, and a pipeline fixing plate is arranged in the middle of the third hollow shell.

As a further optimization of the scheme, the torque rod device, the lifting device and the guide pin are all fixed on the cuboid-shaped first hollow shell through bolts; the number of the guide blocks is 2, each guide block comprises 2 guide blocks symmetrically distributed on the square steel of the main body, and the position connecting lines of the 2 guide blocks are perpendicular to the axis of the pipeline to be connected; each guide block is provided with an inclined guide surface which is matched with the shape of the first floating device; the lifting device comprises an inverted U-shaped fixing part and a columnar lifting part arranged at the central position of the top end of the fixing part; the middle part of the columnar lifting part is provided with a stepped concave part; the torque rod device comprises a threaded rod, and a sleeve part matched with the hydraulic torque wrench is arranged at the top of the threaded rod; the clamp main body is provided with a clamp piece in threaded fit locking connection with the threaded rod.

As a further optimization of the scheme, the centralizer is connected with the cuboid second hollow shell through bolts, and the centralizer is a columnar body with a stepped diameter gradually becoming larger from top to bottom; the hydraulic cylinder positioning device comprises a U-shaped groove, and the hydraulic cylinder is arranged in the U-shaped groove of the hydraulic cylinder positioning device through a hydraulic cylinder guide plate; the pipeline to be connected is fixedly connected with the pipeline fixing plate.

As a further optimization of the scheme, the positioning connecting plate is connected with the positioning device through bolts; the centering spear is connected with the centering device in a plug-in fit manner.

As a further optimization of the above scheme, the first hollow shell is further provided with a guide pin fixedly connected with an auxiliary tool for cleaning the pipeline sludge and oil stains.

As a further optimization of the scheme, the interface flange is in buckle connection with the connecting pin, and when the connecting pin is inserted into the bottom of the interface flange, the hidden pin in the connecting pin can pop out to clamp the interface flange.

As a further optimization of the scheme, the pipeline to be connected is provided with a self-sealing pressure test hole, after the sealing is finished, the pressure is injected into the pressure test hole and maintained, and whether the pressure is reduced or not is checked by the pressure sensor for indication; if the pressure does not drop, it indicates that the seal is intact; otherwise, the seal is not firm.

The underwater connector has the following beneficial effects:

1) Compared with a common lifting ring, the lifting device of the clamp fastening device not only has the lifting function of the lifting ring, but also can be matched with the positioning and fixing of other auxiliary tools.

2) The guide pin can play a guiding role, and can also fix some appurtenances, such as a cleaning device for cleaning silt and oil stains at the joint of the pipeline, and the cleaning device is fixed and operated, so that the appurtenances can be conveniently detached.

3) The interface flange and the connecting pin are in a buckle mode, a spring is arranged in the connecting pin, when the connecting pin is inserted into the bottom of the interface flange, the hidden pin in the connecting pin can pop out to clamp the interface flange, so that the clamp fastening device is firmly fixed on the first floating device, and compared with a common plug mode, the interface mode is firmer, the clamp fastening device is prevented from falling off in sea, and the installation and the disassembly are convenient.

3) The horn mouth type positioning device can more accurately position and fix the device.

4) The utility model adopts an external sacrificial anode mode to carry out corrosion prevention, and has more reliable protection and longer protection time than the traditional surface paint.

5) The hot stab plug can provide power for products faster and more efficiently, and is superior to products which are connected on the shore and are placed under water, and the operation space is limited in that form. The hot-stab plug is adopted, so that the device can be placed in place under water, then the hot-stab plug is inserted to provide required power for the device, and the hot-stab plug is pulled out for recovery after the device is used up, so that the device is convenient and efficient.

6) By adopting the form that the centering device is matched with the centering spear, pipelines which are not on the same axis can be centered on the same axis.

7) The clamp fastening device is the core of the whole underwater connector, two sea pipes are fastened on the first floating device and the second floating device through bolts respectively, the first floating device and the second floating device with pipelines are moved relatively along the guide rail on the base through the hydraulic cylinder until the sealing surface of the pipeline enters the center of the clamp fastening device, the clamp fastening device is operated by an ROV to hold the two pipelines tightly, and the two pipelines are extruded with the sealing ring together, so that the three are extruded under the stress to form a hard seal; the quick connection and sealing effects are realized, and the operation is simple, convenient and accurate; in addition, the utility model has reasonable structural design and wide applicability, and can meet the requirements of transportation pipelines with various sizes from 10 inches to 48 inches; the sealing device can be suitable for various pipelines such as oil, gas and the like.

Drawings

Fig. 1 is a schematic view of the structure of the underwater connector of the present utility model.

Fig. 2 is a schematic view of the first floating device of the underwater connector of the present utility model.

Fig. 3 is a schematic view of a second floating device structure of the underwater connector of the present utility model.

Fig. 4 is a schematic structural view of a clip fastening device of the underwater connector of the present utility model.

Fig. 5 is a schematic view of the base structure of the underwater connector of the present utility model.

Fig. 6 is a schematic view of the interface flange structure of the underwater connector of the present utility model.

Fig. 7 is a schematic view of a lifting device of the underwater connector of the present utility model.

Fig. 8 is a schematic view of the torque rod apparatus of the underwater connector of the present utility model.

Fig. 9 is a schematic view of the centralizer structure of the utility model.

Detailed Description

The underwater connectors and methods of use of the present utility model are described in detail below with reference to FIGS. 1-9.

An underwater connector system for underwater connection of pipes 5 to be connected; the underwater connector comprises a base 1, a clamp fastening device 3, a first floating device 4 and a second floating device 2, wherein the clamp fastening device 3 is arranged on the base, and the first floating device 4 and the second floating device 2 are positioned on two sides of the clamp fastening device 3; the base 1 comprises a main body square steel 7, a cylinder seat 9 and a bell mouth 6, wherein the cylinder seat 9 and the bell mouth 6 are welded on the main body square steel, and a guide block 8 for guiding and positioning the first floating device is welded on the main body square steel; the clamp fastening device comprises a cuboid first hollow shell 10, a lifting device 11 welded at the top of the first hollow shell 10, a clamp main body positioned in the center of the first hollow shell and used for clamping a pipeline 5 to be connected, a torque rod device 13 for controlling the clamp main body 12 to open and close, and a connecting pin 15 positioned on the first hollow shell; the first floating device 4 comprises a cuboid second hollow shell 16, a centralizer 17 connected with the top of the second hollow shell 16 through bolts for positioning, and an interface flange 18 connected with the connecting pin 15 in a clamping fit manner, wherein a centering device 20 with an inner conical hole is symmetrically arranged on the left side and the right side of the bottom of the second hollow shell, a positioning connecting plate 19 is symmetrically arranged on the left side and the right side of the middle of the second hollow shell, and a hydraulic cylinder positioning device 22 is arranged on the positioning connecting plate; the top of the hydraulic cylinder positioning device is connected with a hydraulic cylinder guide plate 21; the second floating device comprises a third hollow shell in a cuboid shape, a positioning device 23 opposite to the horn mouth is arranged on the third hollow shell, a centering spear 24 matched with the centering device in shape is further arranged on the third hollow shell, a thermal stab 25 is further arranged at the top of the third hollow shell, and a pipeline fixing plate 26 is arranged in the middle of the third hollow shell. The torque rod device 13, the lifting device 11 and the guide pin 14 are all fixed on the cuboid-shaped first hollow shell 10 through bolts; the number of the guide blocks is 2, each guide block comprises 2 guide blocks symmetrically distributed on the square steel of the main body, and the position connecting lines of the 2 guide blocks are perpendicular to the axis of the pipeline to be connected; each guide block is provided with an inclined guide surface which is matched with the shape of the first floating device; the lifting device comprises an inverted U-shaped fixing part and a columnar lifting part arranged at the central position of the top end of the fixing part; the middle part of the columnar lifting part is provided with a stepped concave part; the torque rod device comprises a threaded rod, and a sleeve part matched with the hydraulic torque wrench is arranged at the top of the threaded rod; the clamp main body is provided with the clamp spare that is locked with threaded rod screw thread fit, realizes the locking and opening of clamp spare through the tightening and loosening of threaded rod. The centralizer 17 is connected with the cuboid second hollow shell 16 through bolts, and is a columnar body with a stepped diameter gradually becoming larger from top to bottom; the hydraulic cylinder positioning device comprises a U-shaped groove, and the hydraulic cylinder is arranged in the U-shaped groove of the hydraulic cylinder positioning device through a hydraulic cylinder guide plate 21; the pipe 5 to be connected is fixedly connected with the pipe fixing plate, so that the pipe is accurately arranged on the clamp fastening device 3 for sealing, and the hot-stab 25 provides required power for the underwater connector system. The positioning connection plate 19 is connected with the positioning device 23 through bolts; the centering spear 24 is inserted by pulling the first floating means 4 by means of a hydraulic cylinder placed on the hydraulic cylinder positioning means 22. The first hollow shell is further provided with a guide pin 14, and the guide pin 14 is fixedly connected with an auxiliary tool for cleaning the sludge and oil stains of the pipeline. The interface flange 18 and the connecting pin 15 are in a buckling mode, and when the connecting pin 15 is inserted into the bottom of the interface flange 18, a hidden pin in the connecting pin 15 can pop out to clamp the interface flange 18. The interface is firmer than the common plug, so that the clamp fastening device 3 is prevented from falling off in the sea. The pipeline 5 to be connected is provided with a self-sealing pressure test hole, after sealing is finished, the pressure is injected into the pressure test hole and maintained, and whether the pressure is reduced or not is checked by the indication of the pressure sensor; if the pressure does not drop, it indicates that the seal is intact; otherwise, the seal is not firm.

The application method of the underwater connector system comprises the following steps:

1) The assembly process comprises the following steps: hoisting one of the pipelines 5 to be connected to the ship, and fixing the pipeline to be connected to the second floating device 2 through bolts; the other pipeline to be connected is fixed on the first floating device 4 by the same method, after the other pipeline to be connected is fixed, the clamp fastening device 3 is lifted by the lifting device 11, the connecting pin 15 is aligned with the hole of the interface flange 18 and is inserted into the interface flange, when the connecting pin 15 is rotated by 90 degrees, a pin in the connecting pin 15 is ejected out by a spring and is clamped into a groove of the interface flange, thus the clamp fastening device is firmly fixed on the first floating device 4, and the pipelines above the first floating device and the second floating device are sealed by a cover to prevent the pipeline put into water from entering seawater; placing the base 1 at a predetermined position on the sea floor;

2) The operation process comprises the following steps: inserting a guide rod into the bell mouth 6, then lowering the second floating device 2, and inserting the positioning device 23 of the second floating device 2 into the guide rod until the second floating device 2 is stably placed on the base 1; the first floating device 4 and the clamp fastening device 3 are lowered, the first floating device 4 is placed at the centers of the two guide blocks 8, the two guide blocks are used for guiding and positioning the linear displacement of the first floating device, so that the first floating device is positioned at the center of a connecting line of the positions of the two guide blocks, and after the first floating device is placed stably, two pipelines to be connected are positioned on the same axis; lowering a seal cover removing tool, clamping the seal cover removing tool into the guide pin 14, removing the seal cover, lowering a seal ring mounting tool, clamping the seal ring mounting tool into the guide pin 14, mounting a seal ring, then lowering a hydraulic cylinder auxiliary device, respectively clamping two ends of the hydraulic cylinder into the hydraulic cylinder positioning device 22, then operating the hydraulic cylinder, and pulling the first floating device 4 and the clamp fastening device 3 to slowly approach the second floating device 2 until two pipelines to be connected enter the clamp fastening device 3, and lowering a hydraulic torque wrench to insert into the torque rod device 13; rotating the torque rod device 13 to clamp two pipelines to be connected together to form a seal; after the sealing is finished, injecting pressure into a pressure test hole of the pipeline, maintaining the pressure, checking the indication of the pressure sensor, and judging whether the pressure is reduced or not, if the pressure is not reduced, the sealing is good; and taking down the pressure testing tool and the hydraulic cylinder auxiliary tool.

By the specific application of the underwater connector in a deep sea area of 1400m, the utility model has the advantages that compared with the common underwater connector, the pipeline installation efficiency to be connected can be improved by more than 20%, the cost is effectively reduced by at least 10%, and the application prospect is wider.

The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the embodiments described herein, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.

Claims

1. An underwater connector system for underwater connection of pipes (5) to be connected; the method is characterized in that: the underwater connector comprises a base (1), a clamp fastening device (3) arranged on the base, a first floating device (4) and a second floating device (2) which are positioned on two sides of the clamp fastening device (3); the base (1) comprises a main body square steel (7), a cylinder seat (9) and a bell mouth (6) which are welded on the main body square steel, and a guide block (8) for guiding and positioning the first floating device is welded on the main body square steel; the clamp fastening device comprises a cuboid first hollow shell (10), a lifting device (11) fixed at the top of the first hollow shell (10), a clamp main body positioned in the center of the first hollow shell and used for clamping a pipeline (5) to be connected, a torque rod device (13) for controlling the clamp main body (12) to open and close, and a connecting pin (15) positioned on the first hollow shell; the first floating device (4) comprises a cuboid second hollow shell (16), a centralizer (17) connected with the top of the second hollow shell (16) through bolts for positioning, and an interface flange (18) connected with a connecting pin (15) in a clamping fit manner, wherein a centering device (20) with an inner conical hole is symmetrically arranged on the left side and the right side of the bottom of the second hollow shell, a positioning connecting plate (19) is symmetrically arranged on the left side and the right side of the middle of the second hollow shell, and a hydraulic cylinder positioning device (22) is arranged on the positioning connecting plate; the top of the hydraulic cylinder positioning device is connected with a hydraulic cylinder guide plate (21); the second floating device comprises a cuboid third hollow shell, a positioning device (23) opposite to the horn mouth is arranged on the third hollow shell, a centering spear (24) matched with the centering device in shape is further arranged on the third hollow shell, a thermal stab (25) is further arranged at the top of the third hollow shell, and a pipeline fixing plate (26) is arranged in the middle of the third hollow shell.

2. An underwater connector system as in claim 1 wherein: the torque rod device (13), the lifting device (11) and the guide pin (14) are fixed on the cuboid first hollow shell (10) through bolts; the number of the guide blocks is 2, each guide block comprises 2 guide blocks symmetrically distributed on the square steel of the main body, and the position connecting lines of the 2 guide blocks are perpendicular to the axis of the pipeline to be connected; each guide block is provided with an inclined guide surface which is matched with the shape of the first floating device; the lifting device comprises an inverted U-shaped fixing part and a columnar lifting part arranged at the central position of the top end of the fixing part; the middle part of the columnar lifting part is provided with a stepped concave part; the torque rod device comprises a threaded rod, and a sleeve part matched with the hydraulic torque wrench is arranged at the top of the threaded rod; the clamp main body is provided with a clamp piece in threaded fit locking connection with the threaded rod.

3. An underwater connector system as claimed in claim 2 wherein: the centralizer (17) is connected with the cuboid second hollow shell (16) through bolts, and is a columnar body with a stepped diameter gradually becoming larger from top to bottom; the hydraulic cylinder positioning device comprises a U-shaped groove, and the hydraulic cylinder is arranged in the U-shaped groove of the hydraulic cylinder positioning device through a hydraulic cylinder guide plate (21); the pipeline (5) to be connected is fixedly connected with the pipeline fixing plate.

4. A subsea connector system according to claim 3, characterized in that: the positioning connecting plate (19) is connected with the positioning device (23) through bolts; the centering spear (24) is connected with the centering device in a plug-in fit manner.

5. An underwater connector system in accordance with claim 4 wherein: the first hollow shell is also provided with a guide pin (14).

6. An underwater connector system in accordance with claim 5 wherein: the interface flange (18) is in snap connection with the connecting pin (15).

7. An underwater connector system in accordance with claim 6 wherein: the pipeline (5) to be connected is provided with a self-sealing pressure test hole.