Sliding adjustment type stand pipe suspension device and mounting method thereof

Abstract

The invention relates to a sliding adjustment type stand pipe suspension device and an installation method thereof, and belongs to the technical field of marine equipment, the device comprises a plurality of suspension units, each suspension unit comprises a stand pipe butt joint assembly and a pile leg fixing assembly, the stand pipe butt joint assembly comprises a stand pipe unit, and the stand pipe unit is sleeved with a lining in a sliding mode; the pile leg fixing assemblies of the multiple suspension units are sequentially welded to the outer wall of a pile leg of the offshore oil and gas production jacket platform from top to bottom, and the linings of the vertical pipe butt joint assemblies of the multiple suspension units are located on the pile leg fixing assemblies correspondingly. A plurality of upper vertical pipes and lower vertical pipes are connected into a whole pipe which is communicated from top to bottom through adjacent vertical pipe units, and the whole pipe is hung on a pile leg; when the upper vertical pipe and the lower vertical pipe are in butt joint with the upper portion and the lower portion of the vertical pipe unit respectively, the distance between the vertical pipe unit and the upper vertical pipe or the distance between the vertical pipe unit and the lower vertical pipe can be adjusted by sliding the lining on the vertical pipe unit, and then butt joint of the vertical pipe unit and the upper vertical pipe and butt joint of the vertical pipe unit and the lower vertical pipe are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of marine equipment, and in particular relates to a sliding adjustable riser hanging device and an installation method thereof. Background Art

[0002] The offshore oil and gas production jacket platform is the most widely used platform form for offshore oil and gas production. Due to unforeseen oil field access during design, most offshore oil and gas production jacket platforms do not have pre-reserved or pre-installed risers and cable protection pipes, or only pre-installed pipe clamp bases, and offshore risers and cable protection pipes need to be installed later during development.

[0003] At present, the post-installation work of the riser of the offshore oil and gas production jacket platform mainly includes marine organisms cleaning, pipe clamp installation, and riser installation. The existing post-installation methods of the offshore oil and gas production jacket platform all require the centering, opening, and closing of the pipe clamp. For the offshore oil and gas production jacket platform with a water depth of 100 meters, saturation diving operations are required. Although the post-installation measures of the riser such as "one clamp and two pipes" have been applied in offshore oil and gas field development projects, the overall cost is high and has become the main factor affecting the economic development of marginal oil fields.

[0004] However, the current installation of risers on offshore oil and gas production jacket platforms generally uses hanging flanges as the load-bearing devices for the entire riser, which requires various processes such as cleaning of marine organisms and alignment. The installation process is relatively complicated, which is not only time-consuming and labor-intensive, but also has a high overall difficulty. Summary of the invention

[0005] In view of the above problems, an object of the present invention is to provide a sliding adjustable riser suspension device and an installation method thereof, so as to solve the problem that it is difficult to install the riser using a suspension flange.

[0006] To achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention discloses a sliding adjustable riser suspension device, comprising a plurality of suspension units, which are arranged in sequence from top to bottom on the pile legs of an offshore oil and gas production jacket platform, wherein each suspension unit comprises The riser docking assembly comprises a riser unit, a sliding sleeve on the riser unit is provided with a bushing; The pile leg fixing assembly comprises a support and a welding fixing plate, wherein the welding fixing plate is an arc-shaped plate, and the support and the welding fixing plate are connected; The pile leg fixing assemblies of several suspension units are welded sequentially from top to bottom on the outer wall of the pile leg of the offshore oil and gas production jacket platform through the welding fixing plates, and the bushings of the riser docking assemblies of several suspension units are respectively located on the supports of the pile leg fixing assemblies; the upper and lower ports of the riser unit are respectively used to dock the upper riser and the lower riser, and then the multiple upper risers and the lower risers are connected through the adjacent riser units into a whole pipe that is connected from top to bottom and is suspended on the pile leg; When the upper and lower risers are connected to the riser unit respectively, the distance between the riser unit and the upper or lower riser can be adjusted by sliding the bushing on the riser unit, thereby facilitating the connection between the riser unit and the upper and lower risers respectively.

[0007] Preferably, the bushing comprises a bushing upper portion, a bushing middle portion and a bushing lower portion, the bushing middle portion has a large top end and a small bottom end, and is in a truncated cone shape, and the bushing upper portion and the bushing lower portion are respectively provided with two ends of the bushing middle portion; The support is in the shape of an open truncated cone, and the inner wall surface of the support is matched with the outer wall surface of the middle part of the bushing, and the middle part of the bushing can just be located in the support.

[0008] Preferably, the upper and lower ends of the middle part of the bushing are respectively provided with a right truncated cone portion and an inverted right truncated cone portion. The middle part of the bushing is connected as a whole with the upper part of the bushing through the right truncated cone part and the lower part of the bushing through the inverted right truncated cone part.

[0009] Preferably, the upper portion of the bushing, the middle portion of the bushing and the lower portion of the bushing are integrally formed from top to bottom to form the bushing.

[0010] Preferably, an upper baffle and a lower baffle are fixed to both ends of the riser unit, and the upper baffle and the lower baffle are respectively located above the upper part of the bushing and below the lower part of the bushing, and the bushing can slide up and down the riser unit between the upper baffle and the lower baffle.

[0011] Preferably, the pile leg fixing assembly further comprises a support reinforcement plate, and the support and the welding fixing plate are connected via the support reinforcement plate.

[0012] Preferably, the outer surface of the riser unit is provided with chloroprene rubber; The outer surface of the bushing is provided with chloroprene rubber.

[0013] Preferably, a jacket is disposed at the lower part of the offshore oil and gas production jacket platform, a plurality of jackets are passed through the jacket, and a plurality of legs are respectively arranged at the corners of the jacket.

[0014] Preferably, support rods are arranged between adjacent legs of the conductor frame.

[0015] In a first aspect, the present invention further discloses a method for installing a sliding adjustable riser suspension device, which is used to install the sliding adjustable riser suspension device, comprising: Step A: a plurality of pile leg fixing assemblies of the suspension units are sequentially welded from top to bottom on the outer wall of the pile leg of the offshore oil and gas production jacket platform through the welding fixing plate; Step B: placing the bushings of the riser docking assemblies of the plurality of suspension units on the supports of the pile leg fixing assemblies respectively by hoisting; Step C: respectively connecting the upper riser and the lower riser to the upper and lower ports of a plurality of the riser units, and then connecting the plurality of upper riser and the lower riser through the riser units into a whole pipe that is connected from top to bottom.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (I) The present invention discloses a sliding adjustable riser suspension device, comprising a plurality of suspension units, each of which comprises a riser docking assembly and a pile leg fixing assembly, the riser docking assembly comprises a riser unit, a sleeve is provided on the riser unit for sliding; the pile leg fixing assembly comprises a support and a welding fixing plate, the welding fixing plate is an arc-shaped plate, the support and the welding fixing plate are connected; wherein the pile leg fixing assemblies of the plurality of suspension units are sequentially welded from top to bottom on the outer wall of the pile leg of the offshore oil and gas production jacket platform through the welding fixing plate The bushings of the riser docking assemblies of several suspension units are respectively seated on the supports of the pile leg fixing assemblies; the upper and lower ports of the riser unit are respectively used to dock the upper riser and the lower riser, and then the multiple upper risers and the lower risers are connected through the adjacent riser units into a whole pipe that is connected from top to bottom and is suspended on the pile leg; when the upper riser and the lower riser are respectively docked at the upper and lower parts of the riser unit, the distance between the riser unit and the upper riser or the lower riser can be adjusted by sliding the bushing on the riser unit, thereby facilitating the docking of the riser unit with the upper riser and the lower riser respectively.

[0017] (ii) The present invention discloses an efficient installation method for a riser, comprising: the pile leg fixing assemblies of a plurality of suspension units are sequentially welded from top to bottom on the outer wall of the pile leg of an offshore oil and gas production jacket platform by welding fixing plates; the bushings of the riser docking assemblies of the plurality of suspension units are respectively seated on the supports of the pile leg fixing assemblies by hoisting; the upper riser and the lower riser are respectively docked on the upper and lower ports of a plurality of riser units, and then the plurality of upper risers and the lower risers are connected through the riser units into a whole pipe that is connected from top to bottom, thereby realizing efficient installation of the riser suspension, significantly reducing the difficulty of installation, and solving the problem of high difficulty in installing the riser by using the suspension flange at present.

[0018] In addition, the present invention also has the following advantages: 1. The existing riser clamp base requires underwater operations such as diving to install the pipe clamp and fix the bolts, while the device disclosed in the present invention directly has the function of later receiving and installing the riser, and the riser post-installation can be completed without diving or only requires air diving operation, avoiding the need for saturation diving for the post-installation of the 100-meter-level conductor rack riser.

[0019] 2. When the riser unit expands upward due to heat or the like, the bushing of the device disclosed in the present invention can still be located within the support to continue to circumferentially constrain the riser unit.

[0020] 3. The device disclosed in the present invention is a suspension unit that needs to be installed in sections on the jacket of an offshore oil and gas production jacket platform. Since the support only constrains the circumferential movement, the axial position of the riser unit can be flexibly adjusted, which is conducive to flange docking.

[0021] 4. The device disclosed in the present invention is used to build a new offshore oil and gas pipe rack platform. When it is subsequently supported, there is no need to install the riser clamp underwater, and it is suitable for post-installation risers with different outer diameters. For the built offshore oil and gas pipe rack platform, the device disclosed in the present invention can also save the underwater operation of divers to open and close the pipe clamps by air diving or saturation diving, significantly reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a sliding adjustable riser suspension device provided by an embodiment of the present invention being hung on a pile leg of an offshore oil and gas production jacket platform; Figure 2 is a schematic diagram of a suspension unit of a sliding adjustable riser suspension device provided in an embodiment of the present invention; Figure 3 yes Figure 2 A longitudinal sectional view of the suspension unit in FIG. Figure 4 It is a structural schematic diagram of a pile leg fixing assembly of a suspension unit provided in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a riser docking assembly of a suspension unit provided in an embodiment of the present invention; Figure 6 is a structural schematic diagram of a riser unit of a riser docking assembly provided in an embodiment of the present invention; Figure 7 It is a schematic structural diagram of a bushing of a riser docking assembly provided in an embodiment of the present invention.

[0023] Description of reference numerals: 100 - offshore oil and gas production jacket platform, 101 - jacket, 102 - pile leg, 103 - jacket, 104 - strut; 200 - suspension unit; 1-riser pipe docking assembly, 11-riser pipe unit, 111-upper baffle, 112-lower baffle; 12-bushing, 121-upper part of bushing, 122-middle part of bushing, 123-lower part of bushing; 21-support, 22-welding fixing plate, 23-support reinforcement plate. DETAILED DESCRIPTION

[0024] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0025] In order to solve the problem that it is difficult to install a riser by using a suspension flange, the present invention discloses a sliding adjustable riser suspension device, comprising a plurality of suspension units, each of which comprises a riser docking assembly and a pile leg fixing assembly, the riser docking assembly comprises a riser unit, a sleeve is provided on the riser unit for sliding; the pile leg fixing assembly comprises a support and a welding fixing plate, the welding fixing plate is an arc-shaped plate, and the support and the welding fixing plate are connected; wherein the pile leg fixing assemblies of the plurality of suspension units are sequentially welded from top to bottom on the offshore oil and gas production guide pipe through the welding fixing plate On the outer wall of the pile leg of the pipe rack platform, the bushings of the riser docking assemblies of several suspension units are respectively seated on the supports of the pile leg fixing assemblies; the upper and lower ports of the riser unit are respectively used to dock the upper riser and the lower riser, and then the multiple upper risers and the lower risers are connected through the adjacent riser units into a whole pipe that is connected from top to bottom and is suspended on the pile leg; when the upper riser and the lower riser are docked at the upper and lower parts of the riser unit, respectively, the distance between the riser unit and the upper riser or the lower riser can be adjusted by sliding the bushing on the riser unit, thereby facilitating the docking of the riser unit with the upper riser and the lower riser, respectively.

[0026] Embodiment 1: A sliding adjustable riser suspension device Embodiment 1 of the present invention provides a sliding adjustable riser suspension device, and its structure and connection relationship are described in detail below with reference to the accompanying drawings.

[0027] refer to Figures 1 to 7 The sliding adjustable riser suspension device includes a plurality of suspension units 200, which are sequentially arranged from top to bottom on the pile legs 102 of the offshore oil and gas production jacket platform 100, and each suspension unit 200 includes a riser docking assembly 1 and a pile leg fixing assembly 2.

[0028] The riser docking assembly 1 includes a riser unit 11, on which a bushing 12 is slidably sleeved; the pile leg fixing assembly 2 includes a support 21 and a welding fixing plate 22, wherein the welding fixing plate 22 is an arc-shaped plate, and the support 21 and the welding fixing plate 22 are connected; The leg fixing components 2 of the plurality of suspension units 200 are sequentially welded from top to bottom on the outer wall of the leg 102 of the offshore oil and gas production jacket platform 100 through the welding fixing plates 22, and the bushings 12 of the riser docking components 1 of the plurality of suspension units 200 are respectively seated on the supports 21 of the leg fixing components 2; the upper and lower ports of the riser unit 11 are respectively used to dock the upper riser and the lower riser, and then the plurality of upper risers and the lower risers are connected into a whole pipe that is interpenetrating from top to bottom through the adjacent riser units 11, and suspended on the leg 102; When the upper and lower risers are connected to the riser unit 11 respectively, the distance between the riser unit 11 and the upper and lower risers can be adjusted by sliding the bushing 12 on the riser unit 11, thereby facilitating the connection between the riser unit 11 and the upper and lower risers respectively.

[0029] As a preferred embodiment, the bushing 12 includes a bushing upper portion 121, a bushing middle portion 122 and a bushing lower portion 123. The bushing middle portion 122 has a large top and a small bottom, and is in a truncated cone shape. The bushing upper portion 121 and the bushing lower portion 123 are respectively provided with two ends of the bushing middle portion 122. For the convenience of sitting, the support 21 is an open truncated cone shape, and the inner wall surface of the support 21 is matched with the outer wall surface of the bushing middle portion 122, and the bushing middle portion 122 can be just seated in the support 21.

[0030] Specifically, the maximum outer diameter of the bushing middle portion 122 of the bushing 12 is smaller than the minimum inner diameter of the support 21, so that the support 21 can accommodate the bushing 12. When the bushing 12 is seated on the support 21, the two are coaxial.

[0031] More specifically, a right truncated cone portion 1231 and an inverted right truncated cone portion 1232 are respectively provided at the upper and lower ends of the middle portion 122 of the bushing, and the middle portion 122 of the bushing is connected to the upper portion 121 of the bushing and the inverted right truncated cone portion 1232 as a whole with the lower portion 123 of the bushing respectively through the right truncated cone portion 1231.

[0032] Preferably, the bushing upper portion 121 , the bushing middle portion 122 and the bushing lower portion 123 are integrally formed from top to bottom to form the bushing 12 .

[0033] In order to prevent the bushing 12 from falling off when sliding on the riser unit 11, an upper baffle 111 and a lower baffle 112 are fixed to both ends of the riser unit 11, and the upper baffle 111 and the lower baffle 112 are respectively located above the upper part 121 of the bushing and below the lower part 123 of the bushing, and the upper baffle 111 and the lower baffle 112 are respectively used to prevent the bushing 12 from falling off the riser unit 11.

[0034] Specifically, the standpipe unit 11 and the bushing 12 are coaxially arranged, and the bushing 12 can slide up and down on the standpipe unit 11 between the upper baffle 111 and the lower baffle 112 .

[0035] More specifically, the upper baffle 111 and the lower baffle 112 are steel forgings, and their outer diameters are larger than the outer diameters of the bushing upper portion 121 and the bushing lower portion 123 , but smaller than the inner diameter of the bushing middle portion 122 , so that the upper baffle 111 and the lower baffle 112 can constrain the sliding bushing 12 from sliding up and down.

[0036] In order to control the distance between the pile legs 102 and the plurality of upper risers and the lower risers connected through the adjacent riser units 11 to form a whole pipe that is intersecting from top to bottom, a specific implementation is that the pile leg fixing assembly 2 also includes a support reinforcement plate 23, and the support 21 and the welding fixing plate 22 are connected through the support reinforcement plate 23.

[0037] The welding fixing plate 22 and the supporting reinforcing plate 23 are used to connect and fix the support 21 to the offshore oil and gas production jacket platform 100 .

[0038] Specifically, in order to prevent the inner wall of the bushing 12 from wearing the outer wall of the riser unit 11 when the bushing 12 slides, the outer surface of the riser unit 11 is provided with chloroprene rubber.

[0039] In order to prevent the bearing 21 from wearing the bushing 12 , the outer surface of the bushing 12 is provided with chloroprene rubber.

[0040] Specifically, a jacket 101 is disposed at the lower part of the offshore oil and gas production jacket platform 100 . A plurality of jackets 103 are passed through the jacket 101 . A plurality of legs 102 are respectively disposed at the corners of the jacket 101 .

[0041] In order to improve the stability of the offshore oil and gas production jacket platform 100 , struts 104 are disposed between adjacent legs 102 of the jacket 101 .

[0042] Embodiment 2: A method for installing a sliding adjustable riser suspension device Embodiment 2 of the present invention provides a method for installing a sliding adjustable riser suspension device, which is used to install the sliding adjustable riser suspension device of embodiment 1, referring to Figure 1, the installation method includes the following steps: Step A: a plurality of pile leg fixing assemblies 2 of the suspension unit 200 are sequentially welded from top to bottom on the outer wall of the pile leg 102 of the offshore oil and gas production jacket platform 100 through the welding fixing plate 22; Step B: The bushings 12 of the riser docking assemblies 1 of the plurality of suspension units 200 are respectively seated on the supports 21 of the pile leg fixing assemblies 2 by hoisting; Step C: respectively connect the upper riser and the lower riser to the upper and lower ports of a plurality of the riser units 11, and then connect the plurality of upper riser and the lower riser through the riser units 11 to form a whole pipe that is connected from top to bottom.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sliding adjustable riser suspension device, comprising a plurality of suspension units (200), wherein the plurality of suspension units (200) are arranged in sequence from top to bottom on a pile leg (102) of an offshore oil and gas production jacket platform (100), characterized in that: Each suspension unit (200) comprises A riser docking assembly (1) comprises a riser unit (11), wherein a sleeve (12) is provided on a sliding sleeve of the riser unit (11); The pile leg fixing assembly (2) comprises a support (21) and a welding fixing plate (22), wherein the welding fixing plate (22) is an arc-shaped plate, and the support (21) and the welding fixing plate (22) are connected; The pile leg fixing components (2) of the plurality of suspension units (200) are welded sequentially from top to bottom on the outer wall of the pile leg (102) of the offshore oil and gas production jacket platform (100) through the welding fixing plates (22); the bushings (12) of the riser docking components (1) of the plurality of suspension units (200) are respectively seated on the supports (21) of the pile leg fixing components (2); the upper and lower ports of the riser unit (11) are respectively used for docking the upper riser and the lower riser, so that the plurality of upper risers and the lower risers are connected through adjacent riser units (11) into a whole pipe that is interpenetrating from top to bottom and is suspended on the pile leg (102); When the upper and lower riser pipes are connected to the riser pipe unit (11) respectively, the distance between the riser pipe unit (11) and the upper and lower riser pipes can be adjusted by sliding the bushing (12) on the riser pipe unit (11), thereby facilitating the connection of the riser pipe unit (11) with the upper and lower riser pipes respectively.

2. The sliding adjustable riser suspension device according to claim 1, characterized in that: The bushing (12) comprises a bushing upper portion (121), a bushing middle portion (122) and a bushing lower portion (123); the bushing middle portion (122) has a large top end and a small bottom end and is in a truncated cone shape; the bushing upper portion (121) and the bushing lower portion (123) are respectively provided with two ends of the bushing middle portion (122); The support (21) is in the shape of an open truncated cone, and the inner wall surface of the support (21) matches the outer wall surface of the middle part (122) of the bushing, so that the middle part (122) of the bushing can be located in the support (21).

3. The sliding adjustable riser suspension device according to claim 2, characterized in that: The upper and lower ends of the middle part (122) of the bushing are respectively provided with a right truncated cone portion (1231) and an inverted right truncated cone portion (1232). The middle part (122) of the bushing is connected to the upper part (121) of the bushing through the right truncated cone part (1231) and the inverted right truncated cone part (1232) is connected to the lower part (123) of the bushing as a whole.

4. The sliding adjustable riser suspension device according to claim 3, characterized in that: The bushing upper portion (121), the bushing middle portion (122) and the bushing lower portion (123) are integrally formed from top to bottom to form the bushing (12).

5. The sliding adjustable riser suspension device according to claim 2, characterized in that: An upper baffle (111) and a lower baffle (112) are respectively fixed at both ends of the riser unit (11), and the upper baffle (111) and the lower baffle (112) are respectively located above the upper part (121) of the bushing and below the lower part (123) of the bushing, and the bushing (12) can slide up and down on the riser unit (11) between the upper baffle (111) and the lower baffle (112).

6. The sliding adjustable riser suspension device according to claim 1, characterized in that: The pile leg fixing assembly (2) further comprises a support reinforcement plate (23), and the support (21) and the welding fixing plate (22) are connected via the support reinforcement plate (23).

7. The sliding adjustable riser suspension device according to claim 1, characterized in that: The outer surface of the riser unit (11) is provided with chloroprene rubber; The outer surface of the bushing (12) is provided with chloroprene rubber.

8. The sliding adjustable riser suspension device according to claim 1, characterized in that: The lower part of the offshore oil and gas production jacket platform (100) is provided with a jacket (101), a plurality of jackets (103) are passed through the jacket (101), and a plurality of pile legs (102) are respectively arranged at the corners of the jacket (101).

9. The sliding adjustable riser suspension device according to claim 1, characterized in that: A support rod (104) is arranged between adjacent pile legs (102) of the conductor frame (101).

10. A method for installing a sliding adjustable riser suspension device, used for installing the sliding adjustable riser suspension device according to any one of claims 1 to 9, comprising: A plurality of pile leg fixing assemblies (2) of the suspension units (200) are welded sequentially from top to bottom on the outer wall of a pile leg (102) of an offshore oil and gas production jacket platform (100) via the welding fixing plates (22); The bushings (12) of the riser docking assemblies (1) of the plurality of suspension units (200) are respectively seated on the supports (21) of the pile leg fixing assemblies (2) by hoisting; The upper riser and the lower riser are respectively connected to the upper and lower ports of a plurality of the riser units (11), and then the plurality of upper riser and lower riser are connected through the riser units (11) to form a whole pipe that is connected from top to bottom.

Images