Quick dismounting structure for offshore platform jacket grouting pipe

Abstract

The utility model relates to the technical field of ocean engineering platform offshore construction technologies, in particular to an offshore platform jacket grouting pipe quick release structure which comprises a jacket and a grouting pipe and further comprises a first connecting piece and a second connecting piece. The other end of the second connecting piece is detachably connected with one end of the second connecting piece, and the other end of the second connecting piece is fixedly connected with the grouting pipe. According to the utility model, the offshore operation difficulty can be effectively reduced, and the overall anti-corrosion effect of the jacket cannot be influenced after the grouting pipe is dismounted.

Description

TECHNICAL FIELD

[0001] The utility model relates to offshore construction technology field of ocean engineering platform, more particularly, relate to a kind of offshore platform jacket grouting pipe quick release structure. BACKGROUND

[0002] In the offshore construction technology field of ocean engineering platform, offshore oil and gas development is most common with fixed platform, and the platform has a long service life. The oil platform can be regarded as consisting of two parts, the upper part is the functional area, and the lower structure is the jacket. The jacket is composed of hollow leg columns and longitudinal and transverse bars connecting the leg columns, used to support the upper functional area of the fixed platform. The jacket is fixed to the seabed through a skirt, and cement grout is poured into the annular gap between the steel pile and the skirt sleeve to improve the pile capacity. The cement grout is transported to the skirt sleeve through the grouting pipe on the jacket, and the grouting pipe, as a temporary structure, is usually arranged inside the jacket leg and connected to the jacket leg through a pipe support. Since the grouting pipe and the pipe support are both temporary structures attached to the jacket, the grouting pipe and the pipe support are generally fixed and connected by welding. At the same time, the grouting pipe and the pipe support need to be cut off in time after offshore installation, and the cut surface above the water surface needs to be painted and repaired.

[0003] However, due to the influence of sea waves, the cutting and welding operation of the pipe support in the -3m to +3m area of the waterline surface in the splash zone of the jacket is greatly affected by the sea wave impact, the welding operation is very difficult, the end surface paint repair after cutting is difficult, the sacrificial anode and cathodic protection system of the jacket have no obvious corrosion prevention effect on this area, the corrosion speed at this position will be accelerated, and the paint on the surrounding area will be peeled off and fall off in the later stage, thereby affecting the overall corrosion prevention effect of the jacket. SUMMARY

[0004] The purpose of the utility model is to overcome the problem of difficult operation of the grouting pipe installation and cutting operation of the jacket of the offshore platform due to the influence of sea wave impact, and to provide a quick release structure for the grouting pipe of the jacket of the offshore platform, which can effectively reduce the difficulty of offshore operation and will not affect the overall corrosion prevention effect of the jacket after the grouting pipe is removed.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A quick release structure for the grouting pipe of the jacket of the offshore platform is provided, which comprises a jacket and a grouting pipe, and further comprises a first connecting piece and a second connecting piece. One end of the first connecting piece is fixedly connected to the jacket, and the other end is detachably connected to one end of the second connecting piece. The other end of the second connecting piece is fixedly connected to the grouting pipe.

[0007] In the working process of the above scheme, first, the jacket is erected on the offshore platform, the grouting pipe is fixed on the second connecting piece, the first connecting piece is welded on the outer surface of the jacket, and one end of the second connecting piece is installed on the first connecting piece and fixedly connected. After the grouting operation is completed, the detachable fixed connection between the first connecting piece and the second connecting piece is released, the dismounting operation is completed, and the entire installation and dismounting process only needs to release the detachable connection between the first connecting piece and the second connecting piece to dismount the grouting pipe. Meanwhile, the fixed mounting area of the first connecting piece and the second connecting piece does not need to be painted and repaired, effectively reducing the work load, reducing the influence of sea wave beating on the operation, and improving the corrosion prevention effect.

[0008] Further, the first connecting piece is provided with a first flange at the other end, the second connecting piece is provided with a second flange at the other end, and the first flange and the second flange are fixedly connected by the fastener; the detachable connection is in the form of flange butt joint, the fastener is a flange, and the first flange and the second flange are bolted and connected. During installation and dismounting, an electric wrench can be used to install and dismount the bolts, the work load is small, and the efficiency is high.

[0009] Further, the second connecting piece is provided with a horizontal part and a vertical part, one end of the horizontal part is fixedly connected with the outer wall of the vertical part, and the second flange is located at the other end of the horizontal part; the grouting pipe is generally a soft pipe with low hardness, and the vertical part is used for guiding and installing the grouting pipe.

[0010] Further, the second connecting piece is provided with a fixed part, and the fixed part and the horizontal part are located on both sides of the vertical part respectively; the fixed part is used for fixedly installing the grouting pipe.

[0011] Further, the horizontal part and the fixed part are provided with a plurality of axial along the pipe body of the vertical part, and the number of the first connecting pieces is the same as that of the horizontal parts; the jacket and the second connecting piece are vertical long strip-shaped pipes, and the outer wall of the jacket needs to be provided with a plurality of first connecting pieces and horizontal parts in the axial direction to improve the stability of the connection between the jacket and the second connecting piece, avoid connection failure caused by sea waves, and avoid the deformation or displacement of the grouting pipe caused by wind and waves, improve the stability of the fixed connection.

[0012] Further, the fixed part is further provided with a clamping piece for clamping and fixing the grouting pipe; the grouting pipe and the fixed part are fixedly connected in the form of clamping, which is convenient for dismounting and installing.

[0013] Further, the vertical part is a tubular member, the clamping member is provided with a plurality of circular arc clamping grooves arranged side by side along the radial direction of the vertical part, and a plurality of the grouting pipes are installed in the plurality of circular arc clamping grooves; in order to improve the grouting efficiency, a plurality of grouting pipes are generally provided, and the plurality of circular arc clamping grooves can effectively fix the plurality of grouting pipes.

[0014] Further, the end surface of the first flange is provided with a protruding part, the end surface of the second flange is provided with a groove part, and the protruding part is inserted into the groove part; during installation, the protruding part of the first flange is clamped with the groove of the second flange, so that the two flanges can be quickly positioned and the bolts can be quickly installed.

[0015] Further, the auxiliary connecting member is further included, the first connecting member is fixedly connected with the guide pipe frame through the auxiliary connecting member; the auxiliary connecting member is directly welded on the outer surface of the guide pipe frame through butt seam welding, and the first connecting member is welded on the auxiliary connecting member; the welding difficulty of the first connecting member is greater than that of the auxiliary connecting member in actual operation; when the welding of the first connecting member is unqualified, the auxiliary connecting member can be cut off to be re-welded; and the process of cutting off the auxiliary connecting member can effectively avoid the damage of the guide pipe leg and the reduction of the supporting strength.

[0016] Further, the auxiliary connecting member is a plate-shaped member attached to the surface of the pipe body of the guide pipe frame; the auxiliary connecting member is a circular arc-shaped plate with a large thickness, and can appropriately isolate the welding heat effect and deformation of the first connecting member.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1. One end of the first connecting member is fixedly connected with the guide pipe frame, one end of the second connecting member is fixedly connected with the grouting pipe, and the first connecting member and the second connecting member are detachably connected, so that the grouting pipe can be removed only by removing the detachable connection between the first connecting member and the second connecting member during the whole installation and removal process; meanwhile, the fixed installation area of the first connecting member and the second connecting member does not need to be painted and repaired, thereby effectively reducing the work load, reducing the influence of sea wave beating on the operation, and improving the corrosion prevention effect.

[0019] 2. The end surface of the first flange is provided with a protruding part, the end surface of the second flange is provided with a groove part, and the protruding part is inserted into the groove part; during installation, the protruding part of the first flange is clamped with the groove of the second flange, so that the two flanges can be quickly positioned and the bolts can be quickly installed. DRAWINGS

[0020] Figure 1 It is a structural schematic view of a quick dismounting structure of a guide pipe frame grouting pipe of an offshore platform.

[0021] Figure 2It is a top view structural schematic diagram of a quick release structure of a grouting pipe of a jacket of an offshore platform.

[0022] Figure 3 It is a sectional view when a first flange and a second flange of a quick release structure of a grouting pipe of a jacket of an offshore platform are separated.

[0023] In the drawings: 1, jacket; 2, grouting pipe; 3, first connecting piece; 310, first flange; 311, protruding part; 4, second connecting piece; 410, second flange; 411, recessed part; 420, horizontal part; 430, vertical part; 440, fixed part; 450, clamping piece; 451, circular arc clamping groove; 5, fastener; 6, auxiliary connecting piece. DETAILED DESCRIPTION

[0024] The utility model will be further explained in connection with specific implementation. Among them, the drawings are only used for example explanation, and the representation is only a schematic diagram, and cannot be understood as the limitation of the patent; in order to better explain the embodiment of the utility model, some components of the drawings will be omitted, enlarged or reduced, and the size of actual product is not represented; for those skilled in the art, it is understandable that some known structures and their description in the drawings can be omitted.

[0025] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore the position relationship description in the drawings is only used for example explanation, and cannot be understood as the limitation of the patent, for the ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0026] Embodiment 1

[0027] The embodiment is a first embodiment of a quick release structure of a grouting pipe of a jacket of an offshore platform, as shown in Figure 1 And 2 As shown, it comprises a jacket 1 and a grouting pipe 2, and further comprises a first connecting piece 3 and a second connecting piece 4, one end of the first connecting piece 3 is fixedly connected with the jacket 1, the other end is detachably connected with one end of the second connecting piece 4, and the other end of the second connecting piece is fixedly connected with the grouting pipe 2.

[0028] Specifically, the fastener 5 is arranged on the other end of the first flange 310 and the other end of the second flange 410, and the first flange 310 and the second flange 410 are fixedly connected through the fastener 5; the detachable connection is in the form of flange butt joint, the fastener 5 is a flange, and the first flange 310 and the second flange 410 are screw fastened; during installation and disassembly, an electric wrench can be used to install and disassemble the bolt, and the operation load is small and the efficiency is high.

[0029] Specifically, the second connecting piece 4 is provided with a horizontal part 420 and a vertical part 430, one end of the horizontal part 420 is fixedly connected with the outer wall of the vertical part 430, and the second flange 410 is located at the other end of the horizontal part 420; the grouting pipe 2 is generally a soft pipe with low hardness, and the vertical part 430 is used for guiding and installing the grouting pipe 2.

[0030] Specifically, the second connecting piece 4 is provided with a fixed part 440, and the fixed part 440 and the horizontal part 420 are located on both sides of the vertical part 430 respectively; the fixed part 440 is used for fixedly installing the grouting pipe 2.

[0031] Specifically, the horizontal part 420 and the fixed part 440 are both provided with a plurality of axially arranged along the pipe body of the vertical part 430, and the number of the first connecting pieces 3 is the same as that of the horizontal parts 420; the guide pipe support 1 and the second connecting piece 4 are both vertically long strip-shaped pipes, and the outer wall of the guide pipe support 1 needs to be provided with a plurality of first connecting pieces 3 and horizontal parts 420 along the axial direction to improve the stability of the connection between the guide pipe support 1 and the second connecting piece 4, avoid connection failure caused by sea waves, and at the same time, since the grouting pipe 2 is a slender pipe, a plurality of fixed parts 440 are arranged to fix the grouting pipe 2, so that the deformation or displacement phenomenon of the grouting pipe 2 caused by the action of the sea waves can be avoided, and the stability of the fixation is improved.

[0032] Specifically, the fixed part 440 is further provided with a clamping piece 450 for clamping and fixing the grouting pipe 2; the grouting pipe 2 and the fixed part 440 are fixedly connected in the form of clamping, which is convenient for disassembly and installation.

[0033] Specifically, the vertical part 430 is a tubular piece, the clamping piece 450 is provided with a plurality of arc clamping grooves 451 arranged side by side along the radial direction of the vertical part 430, and a plurality of grouting pipes 2 are installed in the plurality of arc clamping grooves 451; in order to improve the grouting efficiency, a plurality of grouting pipes 2 are generally arranged, and a plurality of arc clamping grooves 451 can effectively fix a plurality of grouting pipes 2.

[0034] The working principle of the offshore platform guide pipe support grouting pipe quick release structure of the embodiment is as follows:

[0035] After the jacket 1 is erected on the offshore platform, the first connecting piece 3 is welded on the outer surface of the jacket 1, the first flange 310 of the first connecting piece 3 is butted against the second flange 410 of the second connecting piece 4, the bolt fastener 5 is installed and fastened by using the electric wrench, and finally the grouting pipe 2 is clamped and installed in the arc clamping groove 451 to complete the installation. After the grouting operation is completed, the grouting pipe 2 is removed first, the fastener 5 is removed by using the electric wrench to remove the detachable fixed connection between the first flange 310 and the second flange 410, and the second connecting piece 4 is removed to complete the removal operation.

[0036] The beneficial effects of the embodiment are that the detachable fixed connection between the first flange 310 and the second flange 410 makes the entire installation and removal process not need to use welding and cutting tools for operation, effectively reduces the work load, reduces the influence of sea wave beating on the operation, and the fixed installation area of the first connecting piece 3 and the second connecting piece 4 does not need to be painted and repaired, effectively improving the corrosion effect.

[0037] Embodiment 2

[0038] The second embodiment of the quick disassembly structure of the grouting pipe of the jacket of the offshore platform is shown in Figure 3 The difference from the first embodiment is that:

[0039] Specifically, the end face of the first flange 310 is provided with a protruding part 311, the end face of the second flange 410 is provided with a recessed part 411, and the protruding part 311 is inserted into the recessed part 411; when installing, the protruding part 311 of the first flange 310 is clamped with the recessed part 410 of the second flange 410, so that the two flanges can be quickly positioned and the bolts can be quickly installed.

[0040] The working principle of the quick disassembly structure of the grouting pipe of the jacket of the offshore platform is as follows:

[0041] When installing, the first flange 310 is butted against the second flange 410, the protruding part 311 of the first flange 310 is clamped with the recessed part 410 of the second flange 410, and the bolt is installed on the bolt hole to complete the detachable fixed connection of the flange.

[0042] The beneficial effects of the embodiment are that when installing, the protruding part 311 of the first flange 310 is clamped with the recessed part 410 of the second flange 410, so that the two flanges can be quickly positioned and the bolts can be quickly installed.

[0043] Embodiment 3

[0044] The third embodiment of the quick disassembly structure of the grouting pipe of the jacket of the offshore platform is shown in Figure 2As shown, it comprises a conduit frame 1 and a grouting pipe 2, and further comprises a first connecting piece 3 and a second connecting piece 4, one end of the first connecting piece 3 is fixedly connected with the conduit frame 1, the other end is detachably connected with one end of the second connecting piece 4, and the other end of the second connecting piece is fixedly connected with the grouting pipe 2.

[0045] Specifically, it further comprises a fastener 5, the other end of the first connecting piece 3 is provided with a first flange 310, the other end of the second connecting piece 4 is provided with a second flange 410, the first flange 310 and the second flange 410 are fixedly connected through the fastener 5; the detachable connection is in the form of flange butt joint, the fastener 5 is a flange, the first flange 310 and the second flange 410 are bolted and connected, and during installation and disassembly, an electric wrench can be used to install and disassemble the bolts, so that the operation load is small and the efficiency is high.

[0046] Specifically, the second connecting piece 4 is provided with a horizontal part 420 and a vertical part 430, one end of the horizontal part 420 is fixedly connected with the outer wall of the vertical part 430, and the second flange 410 is located at the other end of the horizontal part 420; the grouting pipe 2 is generally a soft pipe with low hardness, and the vertical part 430 is used for guiding and installing the grouting pipe 2.

[0047] Specifically, the second connecting piece 4 is provided with a fixed part 440, and the fixed part 440 and the horizontal part 420 are located on both sides of the vertical part 430 respectively; the fixed part 440 is used for fixedly installing the grouting pipe 2.

[0048] Specifically, the horizontal part 420 and the fixed part 440 are both provided with a plurality of axially along the pipe body of the vertical part 430, and the number of the first connecting piece 3 is the same as that of the horizontal part 420; the conduit frame 1 and the second connecting piece 4 are both vertically long strip-shaped pipes, and the outer wall of the conduit frame 1 needs to be provided with a plurality of first connecting pieces 3 and horizontal parts 420 along the axial direction to improve the stability of the connection between the conduit frame 1 and the second connecting piece 4, avoid the connection failure caused by the sea waves, and at the same time, since the grouting pipe 2 is a slender pipe, a plurality of fixed parts 440 are arranged to fix the grouting pipe 2, so that the deformation or displacement phenomenon of the grouting pipe 2 caused by the action of the waves can be avoided, and the stability of the fixation is improved.

[0049] Specifically, the fixed part 440 is further provided with a clamping piece 450 for clamping and fixing the grouting pipe 2; the grouting pipe 2 and the fixed part 440 are fixedly connected in the form of clamping, which is convenient for disassembly and installation.

[0050] Specifically, the vertical part 430 is a tubular piece, the clamping piece 450 is provided with a plurality of arc clamping grooves 451 arranged side by side along the radial direction of the vertical part 430, and a plurality of grouting pipes 2 are installed in the plurality of arc clamping grooves 451; in order to improve the grouting efficiency, a plurality of grouting pipes 2 are generally arranged, and a plurality of arc clamping grooves 451 can effectively fix a plurality of grouting pipes 2.

[0051] Specifically, the auxiliary connecting piece 6 is a plate-shaped piece that is attached to the surface of the pipe body of the jacket 1; the auxiliary connecting piece 6 is a circular arc-shaped cladding piece with a large thickness, which can appropriately isolate the welding heat effect and deformation of the first connecting piece 3.

[0052] Specifically, the auxiliary connecting piece 6 is a plate-shaped piece that is attached to the surface of the pipe body of the jacket 1; the auxiliary connecting piece 6 is a circular arc-shaped cladding piece with a large thickness, which can appropriately isolate the welding heat effect and deformation of the first connecting piece 3.

[0053] The working principle of the quick-release structure of the jacket grouting pipe of the offshore platform of the embodiment is as follows:

[0054] During welding, the auxiliary connecting piece 6 is first welded on the jacket 1 through the fillet welding process, and then the first connecting piece 3 is directly welded on the surface of the auxiliary connecting piece 6; when the second connecting piece 4 is removed, the first connecting piece 3 still remains on the pipe leg and does not need to be cut off.

[0055] The beneficial effects of the embodiment are as follows: the auxiliary connecting piece 6 is provided, so that when the welding of the first connecting piece 3 is unqualified, the auxiliary connecting piece 6 can be cut off for re-welding, and the process of cutting off the auxiliary connecting piece 6 can effectively avoid the pipe leg from being damaged to reduce the support strength, and the auxiliary connecting piece 6 can appropriately isolate the welding heat effect and deformation of the first connecting piece 3.

[0056] In the specific contents of the above specific embodiments, any combination of technical features can be combined without contradiction, and in order to make the description simple, not all possible combinations of the above technical features are described, but as long as the combination of technical features does not exist contradiction, it should be considered as the scope of the description.

[0057] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not limited to the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A quick release structure of a grouting pipe of a jacket of an offshore platform, comprising a jacket (1) and a grouting pipe (2), characterized in that, The first connecting piece (3) is fixedly connected with the guide pipe frame (1) at one end and detachably connected with one end of the second connecting piece (4) at the other end, and the other end of the second connecting piece is fixedly connected with the grouting pipe (2).

2. A quick release structure of a grouting pipe of a jacket of an offshore platform according to claim 1, characterized in that, The other end of the first connecting piece (3) is provided with a first flange (310), one end of the second connecting piece (4) is provided with a second flange (410), and the first flange (310) and the second flange (410) are detachably fixedly connected through the fastener (5).

3. A quick release structure of a grouting pipe of a jacket of an offshore platform according to claim 2, characterized in that, The second connecting piece (4) is provided with a horizontal part (420) and a vertical part (430), one end of the horizontal part (420) is fixedly connected with the outer wall of the vertical part (430), and the second flange (410) is located at the other end of the horizontal part (420).

4. A quick release structure for a grouting pipe of a jacket of an offshore platform according to claim 3, characterized in that, The second connecting piece (4) is provided with a fixed part (440), and the fixed part (440) and the horizontal part (420) are located on both sides of the vertical part (430) respectively.

5. A quick release structure of a grouting pipe of a jacket of an offshore platform according to claim 4, characterized in that, The horizontal part (420) and the fixed part (440) are both provided with a plurality of vertical parts (430) in the axial direction of the pipe body, and the number of the first connecting piece (3) is the same as the number of the horizontal part (420).

6. A quick release structure of a grouting pipe of a jacket of an offshore platform according to claim 4, characterized in that, The fixed part (440) is further provided with a clamping piece (450) for clamping and fixing the grouting pipe (2).

7. A quick release structure of a grouting pipe of a jacket of an offshore platform according to claim 6, characterized in that, The vertical part (430) is a tubular piece, the clamping piece (450) is provided with a plurality of circular arc clamping grooves (451) arranged side by side in the radial direction of the vertical part (430), and a plurality of grouting pipes (2) are installed in the plurality of circular arc clamping grooves (451).

8. The quick release structure of a grouting pipe of an offshore platform jacket according to claim 2, characterized in that, The end surface of the first flange (310) is provided with a protruding part (311), and the end surface of the second flange (410) is provided with a recessed part (411), and the protruding part (311) is inserted into the recessed part (411).

9. A quick release structure of a grouting pipe of an offshore platform jacket according to claim 1, characterized in that, The first connecting piece (3) and the guide pipe frame (1) are fixedly connected through the auxiliary connecting piece (6).

10. A quick release structure of a grouting pipe of a jacket of an offshore platform according to claim 9, characterized in that, The auxiliary connecting piece (6) is a plate-shaped piece that is attached to the surface of the pipe body of the guide pipe frame (1).

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