Guide pipe isolation assembly for deepwater oil and gas development and installation method

Abstract

The invention relates to the technical field of underwater equipment, in particular to a guide pipe isolation assembly for deepwater oil and gas development and an installation method.The guide pipe isolation assembly comprises an installation frame, canvas and a sealing ring used for locking the canvas, the middle of the installation frame and the middle of the canvas are each provided with a through hole used for allowing a guide pipe to penetrate through, the canvas is installed on the installation frame, and the sealing ring is arranged on the installation frame. A plurality of balancing weights are further arranged on the outer edge of the canvas, the sealing ring can be arranged on the guide pipe in a sleeving mode, and the sealing ring can wrap the inner edge of the canvas in the circumferential direction of the guide pipe and fix the inner edge to the outer surface of the guide pipe so that a sealing structure can be formed. Through the arrangement of the mounting frame, the sealing ring and the canvas, the canvas can be arranged on the guide pipe in a sleeving manner through the mechanical arm in an underwater environment, so that the mounting of the guide pipe is not influenced, the guide pipe can be unfolded for a sufficient area, and an instrument above the guide pipe is prevented from being influenced by hydrate or gas.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater equipment, and more specifically, to a conduit isolation assembly and an installation method for deep-water oil and gas development. Background Art

[0002] In the field of offshore oil development, with the continuous expansion of the scope of deep-water drilling and completion, during the deep-water drilling and completion process, due to the large amount of shallow gas in the seabed of some waters, it will emerge in the form of hydrates near the wellhead conduit under the deep-water low-temperature and high-pressure environment. When it accumulates in large quantities at the bottom of the blowout preventer and the subsea production tree, it may cause potential hazards such as the freezing and malfunction of the underwater facility components and the increase in the weight of the facility, thereby threatening the safety of wellhead construction.

[0003] In the prior art, there is little design and research on the conduit canvas sealing device. There is a method of pre-installing a circular metal skirt on the conduit, but this installation method needs to be pre-installed before the conduit is lowered into the water. If the metal skirt is large, it will cause obstruction when installing the conduit. If the metal skirt is small, the shielding range of the hydrates is relatively limited, and the instrument facilities above the conduit cannot be well protected. Therefore, an isolation device that can be installed underwater is needed. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiency that the prior art cannot be installed underwater to protect facilities, and provide a conduit isolation assembly and an installation method for deep-water oil and gas development, which facilitate the user to operate through a manipulator to install a canvas on an underwater conduit to protect the facilities.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is:

[0006] Provide a conduit isolation assembly for deep-water oil and gas development, including a mounting frame, a sealing ring and a canvas. Through holes for the conduit to pass through are provided in the middle of the mounting frame and the canvas. The canvas is arranged on the mounting frame, and a plurality of counterweights are further provided at the outer edge of the canvas. The sealing ring can be sleeved on the conduit, and the sealing ring can wrap the inner edge of the canvas along the circumferential direction of the conduit and fix the inner edge on the outer surface of the conduit to form a sealing structure.

[0007] Define the area near the edge of the through-hole of the canvas as the inner edge, and the area near the outer edge of the canvas as the outer edge. Through this setting method, when it is necessary to isolate and protect the underwater equipment, the operator first fixedly installs the middle part of the canvas on the mounting frame, then sets the mounting frame on the conduit, and lowers the mounting frame along the conduit through a crane. The inner edge of the through-hole of the canvas adheres to the conduit under the action of inertia. After the mounting frame is lowered to the designated position of the conduit, the user sleeves the sealing ring on the conduit through a robotic arm, operates the robotic arm to move down to the overlapping part of the canvas and the conduit, and then operates the robotic arm to lock the sealing ring to the canvas to ensure a firm connection between the canvas and the conduit and prevent gas from escaping between the canvas and the conduit. The canvas unfolds under the combined action of seawater buoyancy and counterweights. The counterweights press on the edge of the canvas to prevent the outer edge of the canvas from fluttering and improve the shielding effect of the canvas on the hydrate or gas. In addition to the robotic arm, the present invention can also be installed underwater by divers. The present invention can not only expand the protection range of the instrument but also be installed underwater, improving the service life of the underwater instrument.

[0008] Preferably, the outer edge of the canvas and the inner edge of the through-hole are respectively detachably connected to the mounting frame.

[0009] Through this setting method, the user first folds the middle part of the canvas, then connects the inner edge and the outer edge of the canvas to the mounting frame respectively, and then lowers the mounting frame through a crane; this installation method can prevent the canvas from unfolding during the lowering process and prevent the canvas from scratching or hanging on other equipment; when the mounting frame is lowered to the appropriate position, the robotic arm disconnects the inner edge of the canvas from the mounting frame, and the mounting frame continues to move down a certain distance. The inner edge of the canvas adheres to the conduit under the action of buoyancy and inertia; then the overlapping part of the canvas and the conduit is locked through a sealing ring; and then the robotic arm is operated to separate the outer edge of the canvas from the mounting frame. The canvas naturally unfolds from the folded state under the combined action of seawater buoyancy and counterweights, and the crane retrieves the mounting frame, reducing the weight of the canvas and thus reducing the load borne by the conduit.

[0010] Preferably, a shrinkable rope is provided at the inner edge of the through-hole of the canvas.

[0011] Through this setting method, after the inner edge of the canvas is separated from the mounting frame, the shrinkable rope can drive the inner edge of the canvas to contract, making the inner edge of the canvas fit the conduit, thereby completing the preliminary positioning and facilitating the subsequent locking of the canvas through a sealing ring.

[0012] Preferably, the mounting frame includes an inner ring, an outer ring and a connecting frame. The inner ring and the outer ring are coaxially arranged, and the inner ring and the outer ring are fixedly connected by the connecting frame. A lifting ring is further provided on the connecting frame. The inner edge at the canvas through hole is detachably connected to the inner ring, and the outer edge of the canvas is detachably connected to the outer ring.

[0013] In this setting method, the user can connect the inner edge of the canvas to the inner ring of the mounting frame through an inner rope loop, and connect the outer edge of the canvas to the outer ring of the mounting frame through an outer rope loop. Both the inner rope loop and the outer rope loop are formed by tying ordinary fixed ropes. For the convenience of description, they are only distinguished according to different fixed positions. The canvas can be folded and stored between the inner ring and the outer ring. When underwater installation is carried out, the user can lift the mounting frame through the lifting ring, improving the lifting safety. When the canvas is released, the separated inner ring and outer ring also facilitate the user to cut the inner rope loop and the outer rope loop respectively, improving the convenience of underwater installation.

[0014] Preferably, several of the connecting frames are evenly distributed at equal intervals along the circumferential direction of the inner ring.

[0015] In this setting method, it is beneficial to the stable connection between the inner ring and the outer ring, with smooth force application, reduced stress concentration, and improved device life.

[0016] Preferably, there are at least four lifting rings.

[0017] In this setting method, when lowering, the crane is connected to the mounting frame from four different directions respectively, which is beneficial to reducing the possibility of the mounting frame tipping over and improving the installation success rate.

[0018] Preferably, a plurality of the lifting rings are evenly distributed at equal intervals along the circumferential direction of the inner ring.

[0019] In this setting method, when the crane connects the lifting ring and lowers the mounting frame, it can ensure that the mounting frame is evenly stressed, avoid stress concentration, and is beneficial to improving the installation success rate.

[0020] Preferably, a number of liftable exhaust channels are provided on the canvas, and a number of the counterweights are respectively arranged beside the exhaust channels.

[0021] Furthermore, the canvas is square, and liftable exhaust channels are provided at the four corners of the canvas, and a number of the counterweights are respectively arranged in the middle of each side of the canvas.

[0022] With this arrangement, the counterweights are symmetrically distributed around the canvas, allowing the canvas to maintain an unfolded balanced posture underwater, while the four corners of the canvas are allowed to be tilted due to the planting lines during sewing. The four corners of the canvas are tilted due to the buoyancy and stitching design to form an exhaust channel. When the canvas blocks more hydrates or gases, the accumulated gas can overflow along the four corners of the canvas, preventing hydrates and gases from affecting the equipment directly above the catheter, and preventing excessive accumulation of hydrates and gases in the canvas, which would cause the canvas to be subjected to excessive buoyancy, thereby improving safety.

[0023] Preferably, the sealing ring comprises two semicircular clamping rings, a hinge seat and a locking mechanism, one end of the two semicircular clamping rings are hinged to each other through the hinge seat, and the other end of the two semicircular clamping rings are detachably connected through the locking mechanism.

[0024] With this arrangement, when the canvas needs to be locked, the operator moves the sealing ring to a suitable position through the mechanical arm. At this time, the sealing ring is in an open state, and one end of the two semicircular clamping rings are not connected to each other. The ends of the semicircular clamping rings that are not connected to each other are defined as movable ends. The mechanical arm puts the sealing ring onto the outside of the canvas from the open position, and first makes one of the semicircular clamping rings abut against the catheter. Then, the mechanical arm pushes the other semicircular clamping ring to rotate around the hinge seat, so that the movable ends of the two semicircular clamping rings fit together. Then, the movable ends of the two semicircular clamping rings are fixed and locked through the locking mechanism, so that the two semicircular clamping rings clamp the canvas on the catheter, ensuring that the canvas is tightly and stably connected to the catheter, preventing hydrates or gases from escaping from between the canvas and the catheter, and improving the isolation and protection effect.

[0025] Preferably, the locking mechanism includes a screw, a first locking seat and a second locking seat, the screw is provided with an abutment block, the first locking seat and the second locking seat are respectively fixedly mounted on the ends of the two semicircular clamping rings, the second locking seat is provided with a threaded hole, the first locking seat is provided with a through hole, the screw is passed through the first locking seat and is threadedly connected with the second locking seat, and the abutment block can abut against the first locking seat.

[0026] Through this arrangement, when it is necessary to lock the two semicircular clamping rings, the user controls the mechanical arm to pass the screw through the first locking seat and threadedly connect it with the second locking seat. As the screw rotates and extends into the threaded hole of the second locking seat, the abutment block abuts against the first locking seat and presses the first locking seat and the second locking seat into close contact, thereby driving the two semicircular clamping rings to lock and clamp the canvas inside the semicircular locking rings.

[0027] Preferably, a plurality of clamping rings are further provided on the outer side of the semicircular clamping ring.

[0028] With this setting method, the user can operate the robotic arm to clamp the clamping ring, which is convenient for the user to operate.

[0029] Preferably, a plurality of sealing gaskets are further provided on the inner side of the semi-circular clamping ring.

[0030] With this setting method, when the semi-circular clamping ring locks the canvas, the sealing gasket can play a buffering role, which can not only improve the sealing effect, but also buffer the local pressure to prevent the semi-circular clamping ring from damaging the conduit.

[0031] An installation method of a conduit isolation assembly is applied to a conduit isolation assembly for deep-water oil and gas development as described in any one of the above, and includes the following steps:

[0032] S1. Fold the canvas and connect the inner edge and the outer edge of the canvas to the mounting frame respectively;

[0033] S2. Sleeve the mounting frame outside the conduit and lower it to the installation position by a crane;

[0034] S3. The robotic arm cuts off the connection between the inner edge of the canvas and the mounting frame, and the inner edge of the canvas is sleeved on the conduit through the shrinkage rope;

[0035] S4. The robotic arm grabs the sealing ring and sleeves it outside the canvas;

[0036] S5. The robotic arm operates the sealing ring to lock the canvas on the conduit;

[0037] S6. The robotic arm cuts off the connection between the outer edge of the canvas and the mounting frame;

[0038] S7. The crane retrieves the mounting frame.

[0039] With this setting method, the user can use the robotic arm to install the canvas for blocking hydrates or gases at the underwater conduit, thereby protecting the instruments or connection structures above the conduit and improving the safety of underwater equipment.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] (1) Through the settings of the mounting frame, the sealing ring and the canvas, the canvas can be sleeved on the conduit by the robotic arm in the underwater environment, which not only does not affect the installation of the conduit, but also can expand enough area to avoid the instruments above the conduit being affected by hydrates or gases.

[0042] (2) Through the separated inner ring and outer ring settings, it is convenient for the user to release the inner edge and the outer edge of the canvas underwater respectively, which improves the simplicity of operation.

[0043] (3) Through the setting of the sealing ring, it is ensured that the canvas is fixed on the conduit, and further reduces the possibility of gas escape, improving safety.

[0044] (4) Through the setting of the exhaust channels at the four corners of the canvas, the water mixture or gas blocked by the canvas can be discharged at the designated position, avoiding the influence on the instruments within the top shielding range. Description of the Drawings

[0045] Figure 1 It is a schematic diagram of the overall structure of a conduit isolation assembly for deep - water oil and gas development according to the present invention;

[0046] Figure 2 It is a schematic diagram of the mounting frame structure of a conduit isolation assembly for deep - water oil and gas development according to the present invention; (The canvas is in a folded state)

[0047] Figure 3 It is a schematic diagram of the unfolded structure of the canvas of a conduit isolation assembly for deep - water oil and gas development according to the present invention;

[0048] Figure 4 It is a schematic diagram of the sealing ring structure of a conduit isolation assembly for deep - water oil and gas development according to the present invention.

[0049] The illustration marks are explained as follows:

[0050] 1. Mounting frame; 11. Inner ring; 12. Outer ring; 13. Connecting frame; 14. Lifting ring; 15. Inner rope ring; 16. Outer rope ring; 2. Sealing ring; 21. Semi - circular clamping ring; 22. Hinge seat; 23. Locking mechanism; 231. Screw; 232. First locking seat; 233. Second locking seat; 234. Abutting block; 24. Clamping ring; 3. Canvas; 31. Counterweight; 32. Exhaust channel. Detailed Embodiments

[0051] The present invention will be further described below in conjunction with the detailed embodiments. Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well - known structures and their descriptions in the drawings may be omitted.

[0052] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0053] Embodiment 1

[0054] As Figures 1 to 4 Shown in the figure is the first embodiment of a conduit isolation assembly for deep - water oil and gas development according to the present invention, which includes a mounting frame 1, a canvas 3, and a sealing ring 2 for locking the canvas 3. Through - holes for the conduit to pass through are provided in the middle of both the mounting frame 1 and the canvas 3. The canvas 3 is installed on the mounting frame 1. A number of counterweights 31 are also provided on the outer edge of the canvas 3. The sealing ring 2 can be sleeved on the conduit, and the sealing ring 2 can wrap the inner edge of the canvas 3 along the circumferential direction of the conduit and fix the inner edge on the outer surface of the conduit to form a sealing structure.

[0055] Define the edge at the through - hole of the canvas 3 as the inner edge, and the outer edge of the canvas 3 as the outer edge. By this setting method, when it is necessary to isolate and protect underwater equipment, the operator first fixedly installs the middle of the canvas 3 on the mounting frame 1, then sets the mounting frame 1 on the conduit, and lowers the mounting frame 1 along the conduit through a crane. The inner edge at the through - hole of the canvas 3 adheres to the conduit under the action of inertia. After the mounting frame 1 is lowered to the designated position on the conduit, the user sleeved the sealing ring 2 on the conduit through a robotic arm, operates the robotic arm to move down to the overlapping part of the canvas 3 and the conduit, and then operates the robotic arm to lock the sealing ring 2 to the canvas 3 through the robotic arm to ensure the firm connection between the canvas 3 and the conduit and prevent gas from escaping between the canvas 3 and the conduit. The canvas 3 unfolds under the combined action of the buoyancy of seawater and the counterweights 31, and the counterweights 31 press the edge of the canvas to prevent the outer edge of the canvas from fluttering, improving the shielding effect of the canvas on hydrates or gas. In addition to the robotic arm, the present invention can also be installed underwater by divers. The present invention can not only expand the protection range of the instrument but also be installed underwater, improving the service life of underwater instruments.

[0056] As an embodiment of the present invention, the outer edge of the canvas 3 and the inner edge at the through - hole are respectively detachably connected to the mounting frame 1.

[0057] In this setting method, the user first folds the middle part of the canvas 3, then connects the inner edge and the outer edge of the canvas 3 to the mounting frame 1 respectively, and then lowers the mounting frame 1 by a crane; this installation method can prevent the canvas 3 from unfolding during the lowering process and avoid the canvas 3 from scraping or hanging on other equipment; when the mounting frame 1 is lowered to the appropriate position, the robotic arm disconnects the inner edge of the canvas 3 from the mounting frame 1, and the mounting frame 1 continues to move down a certain distance. The inner edge of the canvas 3 adheres to the conduit under the action of buoyancy and inertia; then the overlapping part of the canvas 3 and the conduit is locked by the sealing ring 2; then, through the operation of the robotic arm, the outer edge of the canvas 3 is separated from the mounting frame 1, and the canvas 3 naturally unfolds from the folded state under the combined action of seawater buoyancy and the counterweight 31. The crane retrieves the mounting frame 1, reducing the weight of the canvas and thus reducing the load borne by the conduit.

[0058] As an embodiment of the present invention, a contraction rope is provided at the inner edge of the through-hole of the canvas 3.

[0059] Through this setting method, after the inner edge of the canvas 3 is separated from the mounting frame, the contraction rope can drive the inner edge of the canvas 3 to contract, making the inner edge of the canvas 3 fit the conduit, thus completing the preliminary positioning and facilitating the subsequent locking of the canvas 3 by the sealing ring 2.

[0060] As an embodiment of the present invention, the mounting frame 1 includes an inner ring 11, an outer ring 12 and a connecting frame 13. The inner ring 11 and the outer ring 12 are coaxially arranged, and the inner ring 11 and the outer ring 12 are fixedly connected by the connecting frame 13. A lifting ring 14 is also provided on the connecting frame 13. The inner edge of the through-hole of the canvas 3 is detachably connected to the inner ring 11, and the outer edge of the canvas 3 is detachably connected to the outer ring 12.

[0061] Through this setting method, the user can connect the inner edge of the canvas 3 to the inner ring 11 of the mounting frame 1 through the inner rope loop 15, and connect the outer edge of the canvas 3 to the outer ring 12 of the mounting frame 1 through the outer rope loop 16. Both the inner rope loop 15 and the outer rope loop 16 are formed by tying ordinary fixed ropes. For the convenience of description, they are only distinguished according to different fixed positions; the canvas 3 can be folded and stored between the inner ring 11 and the outer ring 12; when performing underwater installation, the user can lift the mounting frame 1 through the lifting ring 14 to improve the lifting safety; when releasing the canvas 3, the split inner ring 11 and outer ring 12 also facilitate the user to cut the inner rope loop 15 and the outer rope loop 16 respectively, improving the convenience of underwater installation.

[0062] As an embodiment of the present invention, a plurality of connecting frames 13 are evenly distributed along the circumferential direction of the inner ring 11.

[0063] Through this setting method, it is beneficial to the stable connection between the inner ring 11 and the outer ring 12, with smooth force, reduced stress concentration, and improved device life.

[0064] As one embodiment of the present invention, there are four lifting rings 14 .

[0065] With this arrangement, when lowering, the crane is connected to the mounting frame 1 from four different directions, which helps to reduce the possibility of the mounting frame 1 tipping over and improve the success rate of installation.

[0066] As an embodiment of the present invention, a plurality of lifting rings 14 are equidistantly distributed along the circumference of the inner ring 11 .

[0067] By means of this arrangement, when the crane is connected to the lifting ring 14 and lowers the mounting frame 1, it can ensure that the mounting frame 1 is subjected to uniform force, thus avoiding stress concentration and facilitating improving the success rate of installation.

[0068] Example 2

[0069] The following is a second embodiment of a conduit isolation assembly for deepwater oil and gas development of the present invention. This embodiment is similar to the first embodiment, except that the canvas 3 is further limited.

[0070] As an embodiment of the present invention, the canvas 3 is square, and the four corners of the canvas 3 are provided with raised exhaust passages 32 , and a plurality of counterweights 31 are respectively installed in the middle of each side of the canvas 3 .

[0071] With this arrangement, the counterweights 31 are symmetrically distributed around the canvas 3, allowing the canvas 3 to maintain an unfolded balanced posture underwater, while the four corners of the canvas 3 can be tilted due to the planting lines during sewing. The four corners of the canvas 3 are tilted due to the buoyancy and stitching design to form an exhaust channel 32. When the canvas 3 blocks more hydrates or gases, the accumulated gas can overflow along the four corners of the canvas 3, preventing the hydrates and gases from affecting the equipment directly above the catheter, and preventing the hydrates and gases from accumulating too much in the canvas 3, resulting in excessive buoyancy on the canvas 3, thereby improving safety.

[0072] Example 3

[0073] The following is a third embodiment of a conduit isolation assembly for deepwater oil and gas development of the present invention. This embodiment is similar to the first embodiment, except that the sealing ring 2 is further limited.

[0074] As an embodiment of the present invention, the sealing ring 2 includes two semicircular clamping rings 21, a hinge seat 22 and a locking mechanism 23. One end of the two semicircular clamping rings 21 are hinged to each other through the hinge seat 22, and the other end of the two semicircular clamping rings 21 is detachably connected through the locking mechanism 23.

[0075] With this setting method, when it is necessary to lock the canvas 3, the operator moves the sealing ring 2 to a proper position through the ROV manipulator. At this time, the sealing ring 2 is in an open state, and one end of the two semi-circular clamping rings 21 therein is not connected. Define the end where the semi-circular clamping rings 21 are not connected as the movable end. The manipulator sleeves the sealing ring 2 from the open position outside the canvas 3. First, make one of the semi-circular clamping rings 21 abut against the conduit, and then the manipulator pushes the other semi-circular clamping ring 21 to rotate around the hinge seat 22 to make the movable ends of the two semi-circular clamping rings 21 fit together. Subsequently, the two semi-circular clamping rings 21 are fixedly locked through the locking mechanism 23, so that the two semi-circular clamping rings 21 clamp the canvas 3 on the conduit, ensuring that the connection between the canvas 3 and the conduit is tight and stable, preventing hydrates or gases from escaping between the canvas 3 and the conduit, and improving the isolation and protection effect.

[0076] As an embodiment of the present invention, the locking mechanism 23 includes a screw 231, a first locking seat 232 and a second locking seat 233. An abutting block 234 is provided on the screw 231. The first locking seat 232 and the second locking seat 233 are respectively fixedly arranged at the ends of the two semi-circular clamping rings 21. A threaded hole is provided on the second locking seat 233, and a through hole is provided on the first locking seat 232. The screw 231 passes through the first locking seat 232 and is threadedly connected with the second locking seat 233, and the abutting block 234 can abut against the first locking seat 232.

[0077] With this setting method, when it is necessary to lock the two semi-circular clamping rings 21, the user manipulates the ROV manipulator to thread the screw 231 through the first locking seat 232 and the second locking seat 233. As the screw 231 rotates and penetrates into the threaded hole of the second locking seat 233, the abutting block 234 abuts against the first locking seat 232 and presses the first locking seat 232 and the second locking seat 233 to be in close contact, thereby driving the two semi-circular clamping rings 21 to lock and clamping the canvas 3 inside the semi-circular locking ring.

[0078] As an embodiment of the present invention, a plurality of clamping rings 24 are further provided on the outer side of the semi-circular clamping ring 21.

[0079] With this setting method, the user can operate the ROV manipulator to clamp the clamping ring 24, which is convenient for the user to operate.

[0080] As an embodiment of the present invention, a plurality of sealing gaskets are further provided on the inner side of the semi-circular clamping ring 21.

[0081] With this setting method, when the semi-circular clamping ring 21 locks the canvas 3, the sealing gasket can play a buffering role, which can not only improve the sealing effect, but also buffer the local pressure and prevent the semi-circular clamping ring 21 from damaging the conduit.

[0082] Embodiment 4

[0083] The following is an embodiment of the installation method of a conduit isolation component of the present invention, which is applied to a conduit isolation component for deep-water oil and gas development according to any one of Embodiments 1 to 3, and includes the following steps:

[0084] S1. Fold the canvas 3, and connect the inner edge and the outer edge of the canvas 3 to the mounting frame 1 respectively;

[0085] S2. Set the mounting frame 1 outside the conduit, and lower it to the installation position by a crane;

[0086] S3. The robotic arm cuts off the connection between the inner edge of the canvas 3 and the mounting frame 1, and the inner edge of the canvas 3 is sleeved on the conduit through the shrinkage rope;

[0087] S4. The robotic arm grabs the sealing ring 2 and sleeves it outside the canvas 3;

[0088] S5. The robotic arm operates the sealing ring 2 to lock the canvas 3 onto the conduit;

[0089] S6. The robotic arm cuts off the connection between the outer edge of the canvas 3 and the mounting frame 1;

[0090] S7. The crane retrieves the mounting frame 1.

[0091] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A conduit isolation assembly for deepwater oil and gas development, characterized in that: The invention comprises a mounting frame (1), a canvas (3) and a sealing ring (2) for locking the canvas (3); the mounting frame (1) and the middle part of the canvas (3) are both provided with through holes for allowing a conduit to pass through; the canvas (3) is mounted on the mounting frame (1); the outer edge of the canvas (3) is also provided with a plurality of counterweights (31); the sealing ring (2) can be sleeved on the conduit, and the sealing ring (2) can wrap the inner edge of the canvas (3) along the circumference of the conduit and fix the inner edge to the outer surface of the conduit to form a sealing structure.

2. The conduit isolation assembly for deepwater oil and gas development according to claim 1, characterized in that: The outer edge of the canvas (3) and the inner edge of the through hole are respectively detachably connected to the mounting frame (1).

3. The conduit isolation assembly for deepwater oil and gas development according to claim 2, characterized in that: A contraction rope is provided at the inner edge of the through hole of the canvas (3).

4. The conduit isolation assembly for deepwater oil and gas development according to claim 3, characterized in that: The mounting frame (1) comprises an inner ring (11), an outer ring (12) and a connecting frame (13); the inner ring (11) and the outer ring (12) are coaxially arranged; the inner ring (11) and the outer ring (12) are fixedly connected via the connecting frame (13); a lifting ring (14) is also provided on the connecting frame (13); the inner edge of the through hole of the canvas (3) is detachably connected to the inner ring (11); and the outer edge of the canvas (3) is detachably connected to the outer ring (12).

5. The conduit isolation assembly for deepwater oil and gas development according to claim 3, characterized in that: The canvas (3) is provided with a plurality of bulgeable exhaust passages (32), and a plurality of counterweight blocks (31) are respectively arranged beside the exhaust passages (32).

6. The conduit isolation assembly for deepwater oil and gas development according to claim 3, characterized in that: The sealing ring (2) comprises two semicircular clamping rings (21), an articulated seat (22) and a locking mechanism (23); one end of the two semicircular clamping rings (21) are hinged to each other via the articulated seat (22), and the other end of the two semicircular clamping rings (21) are detachably connected via the locking mechanism (23).

7. The conduit isolation assembly for deepwater oil and gas development according to claim 6, characterized in that: The locking mechanism (23) comprises a screw rod (231), a first locking seat (232) and a second locking seat (233); the screw rod (231) is provided with an abutment block (234); the first locking seat (232) and the second locking seat (233) are respectively fixedly mounted on the ends of the two semicircular clamping rings (21); the second locking seat (233) is provided with a threaded hole; the first locking seat (232) is provided with a through hole; the screw rod (231) is passed through the first locking seat (232) and is threadedly connected with the second locking seat (233); the abutment block (234) can abut against the first locking seat (232).

8. The conduit isolation assembly for deepwater oil and gas development according to claim 7, characterized in that: A plurality of clamping rings (24) are also provided on the outer side of the semicircular clamping ring (21).

9. The conduit isolation assembly for deepwater oil and gas development according to claim 8, characterized in that: A plurality of sealing rubber pads are also provided on the inner side of the semicircular clamping ring (21).

10. A method for installing a conduit isolation assembly, applied to a conduit isolation assembly for deepwater oil and gas development as claimed in any one of claims 3 to 9, comprising the following steps: S1, folding the canvas (3), and connecting the inner edge and the outer edge of the canvas (3) to the mounting frame (1) respectively; S2, sleeve the mounting frame (1) outside the conduit, and lower it to the mounting position by means of a crane; S3, the mechanical arm cuts off the connection between the inner edge of the canvas (3) and the mounting frame (1), and the inner edge of the canvas (3) is arranged on the catheter through the retractable rope loop; S4, the mechanical arm grabs the sealing ring (2) and sleeves it outside the canvas (3); S5, the mechanical arm operates the sealing ring (2) to lock the canvas (3) onto the catheter; S6, the mechanical arm cuts off the connection between the outer edge of the canvas (3) and the mounting frame (1); S7, the crane reclaims the mounting frame (1).

Images