Marine drilling composite marine riser lifted and restrained by lifting chain

Abstract

The utility model discloses an offshore drilling composite marine riser capable of being lifted and restrained through a lifting chain, and belongs to the field of offshore drilling. In order to solve the problem that an existing steel marine riser is low in mounting and dismounting efficiency, the composite marine riser comprises a composite pipe, a quick connector and a lifting chain. Every two adjacent composite material marine risers are rapidly connected through a rapid connector, and a lifting chain is installed between every two adjacent rapid connectors and used for lifting the composite material marine riser column, bearing the buoyancy weight of the composite material marine riser column in seawater and restraining possible swing and bending of the composite material marine riser column in the sea. The composite marine riser is resistant to corrosion, low in cost and light in weight, the mounting and dismounting efficiency can be greatly improved, the requirement for variable loads of deck design of a floating drilling device is lowered, and the marine drilling cost is reduced. In deepwater and ultra-deepwater drilling, if the device is used in cooperation with a seabed electric blowout preventer, the cost reduction effect is more remarkable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ocean drilling, and concretely is a kind of ocean drilling composite riser that is lifted and restrained by hoisting chain. BACKGROUND

[0002] The main function of ocean drilling riser is to isolate seawater and establish circulation passage for drilling fluid.The traditional steel riser used in ocean drilling has the problems of high research and development difficulty, high production cost, large single weight, low installation and disassembly efficiency, and high requirement for deck design variable load of floating drilling device (mainly drilling ship and semi-submersible drilling platform). SUMMARY

[0003] To solve the problem of low installation and disassembly efficiency of the existing steel riser, the utility model provides a kind of ocean drilling composite riser that is lifted and restrained by hoisting chain, which contains composite pipe, quick connection joint and hoisting chain, two adjacent composite risers are connected by quick connection joint, and single composite riser is operated and transported as a whole, which can greatly improve the installation and disassembly efficiency of composite riser, reduce the requirement for bearing capacity of floating drilling device, and reduce the cost of ocean drilling.

[0004] The technical scheme adopted in the embodiment of the utility model to solve the technical problem is:

[0005] A kind of composite riser includes composite pipe, quick connection joint and hoisting chain, two adjacent composite pipes are connected by quick connection joint, and two adjacent quick connection joints are connected by multiple hoisting chains.

[0006] The density of the composite pipe is 0.7g / cm 3 ~1g / cm 3 The composite pipe is provided with middle support and bottom support, and the middle support and the bottom support are integrally formed with the composite pipe.

[0007] The quick connection joint contains cylindrical shell, and the outer periphery of the shell is uniformly provided with multiple hoisting chain bolt supports, and the upper end and the lower end of the hoisting chain bolt support are respectively provided with hoisting chain upper bolt and hoisting chain lower bolt; the top end of the hoisting chain is hung on the hoisting chain lower bolt, and the hoisting chain is connected to the hoisting chain upper bolt of the adjacent quick connection joint below through middle support and bottom support, and the middle support bolt and the bottom support bolt pass through one link of the hoisting chain respectively.

[0008] The quick connection joint comprises a handle type quick connector and a connector support, and the handle type quick connector is installed on the connector support by a hinge pin; the handle type quick connector comprises a locking head, a connecting part and a handle, and the locking head, the connecting part and the handle are integrally formed.

[0009] The two ends of the composite pipe are provided with integrally formed joint sections, and the joint sections comprise arc-shaped necks, the profiles of the arc-shaped necks are arc-shaped, and the working end of the locking head is also arc-shaped; when the working end of the locking head is engaged with the arc-shaped neck, the quick connection joint is in a locked state; when the working end of the locking head is separated from the arc-shaped neck, the quick connection joint is in an unlocked state.

[0010] The handle type quick connector further comprises a locking mechanism, the locking mechanism is of an automatic lock pin type, and the locking mechanism is installed on one side of the connector support; the automatic lock pin type locking mechanism comprises a handle lock pin and a spring, the spring can provide a restoring force to the handle lock pin, when the handle lock pin is inserted into a handle lock hole, the handle is in a locked state; when the handle lock pin is pulled out of the handle lock hole, the handle is in an unlocked state.

[0011] The outer periphery of the shell is uniformly provided with a plurality of connector supports, and the upper part and the lower part of each connector support are respectively provided with a handle type quick connector, and the two handle type quick connectors are mirror images of each other.

[0012] The joint section of the composite pipe comprises two sealing rings.

[0013] The handle type quick connector is internally provided with a sealing gasket, after the quick connection of the two composite water pipes is completed, the end surface of the composite pipe extrudes the sealing gasket, and the sealing gasket and the sealing ring can jointly prevent the fluid in the composite pipe from leaking outward and prevent seawater from entering the composite pipe.

[0014] The beneficial effects of the embodiment of the utility model are as follows: the marine drilling composite water pipe restrained by the lifting chain comprises a composite pipe, a quick connection joint and a lifting chain, two adjacent composite water pipes are quickly connected through the quick connection joint, the lifting chain is used for bearing the buoyant weight of the composite water pipe column in seawater, and the composite pipe is restrained within the range defined by the plurality of lifting chain rings, the installation and dismounting efficiency of the composite water pipe column can be greatly improved, the composite water pipe is corrosion-resistant, low in cost, light in weight and convenient to transport, the requirement for the variable load of the deck design of the floating drilling device can be reduced, and the marine drilling cost is reduced; in deep water drilling, if the marine drilling composite water pipe is used in cooperation with a seabed electric blowout preventer, the cost reduction effect is more remarkable. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification provide further understanding of the application, serve as a basis for interpreting the application, and do not constitute undue limitations on the application.

[0016] Figure 1 is a schematic view of the single composite water pipe.

[0017] Figure 2 is a schematic view of the composite water pipe column.

[0018] Figure 3 is a schematic view of the composite pipe.

[0019] Figure 4 is a cross-sectional view of the middle support and the bottom support.

[0020] Figure 5 is a schematic view of the quick connector.

[0021] Figure 6 is a schematic view of the handle type quick connector structure.

[0022] Figure 7 is a schematic view of the handle lock pin structure.

[0023] The reference signs are explained as follows:

[0024] 1, composite pipe; 2, quick connector; 3, lifting chain; 4, middle support; 5, bottom support; 6, upper pin of lifting chain; 7, lower pin of lifting chain; 8, middle support pin; 9, bottom support pin;

[0025] 11, connector section; 12, arc-shaped bottle neck; 13, sealing ring; 14, sealing gasket;

[0026] 21, handle type quick connector; 22, handle; 23, connector support; 24, shell; 25, hinge pin; 26, handle lock pin; 27, spring; 28, lifting chain pin support;

[0027] 41, pair of flanges; 42, single flange;

[0028] 221, locking head; 222, connecting part; 223, handle lock hole;

[0029] 231, hinge pin mounting hole; 232, handle lock pin mounting hole;

[0030] 241, locking through hole. DETAILED DESCRIPTION

[0031] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0032] As shown in Figure 1 and Figure 2 embodiments of the present application, the marine drilling composite riser is lifted and restrained by the lifting chain, comprising a composite pipe 1, a quick connecting joint 2 and a lifting chain 3. Two adjacent composite pipes 1 are connected through the quick connecting joint 2, and the lifting chain 3 is installed between two adjacent quick connecting joints 2.

[0033] The composite pipe 1 can adopt the existing technical product, for example, the composite pipe 1 contains a metal framework and single-layer or multi-layer high polymer material, composite material, so as to improve the strength, and the material of the single-layer or multi-layer high polymer material, composite material can select the existing engineering plastic or epoxy resin (and foaming material thereof). The density of the composite pipe 1 is controlled within 0.7g / cm 3 ~1g / cm 3 , which can provide buoyancy for the composite riser string, reduce the floating weight of the composite riser string in seawater, and accordingly reduce the tension of the lifting chain 3 when it is vertically erected in seawater, and reduce the requirement of variable load design of the deck of the floating drilling device. The composite pipe 1 is corrosion-resistant and low in cost.

[0034] As shown in Figure 1 and Figure 2 , the composite pipe 1 is provided with a middle support 4 and a bottom support 5, and the middle support 4 and the bottom support 5 are integrally formed with the composite pipe 1. The middle support 4 and the bottom support 5 have the following three functions: first, to strengthen the composite pipe 1; second, to restrain the composite pipe 1 when the composite riser is vertically erected in seawater, to limit the composite pipe 1 within the range defined by the multiple lifting chains 3 in tension state, and to prevent the composite pipe 1 from swinging and bending in seawater; third, to protect the composite pipe body when the composite riser is laid flat, and to protect and restrain the lifting chain 3, so that the lifting chain 3 basically maintains a straight line.

[0035] As shown in Figure 3 , the two ends of the composite pipe 1 are integrally formed with a joint section 11, and the joint section 11 contains an arc-shaped neck 12 and two sealing rings 13. The arc-shaped neck 12 cooperates with the locking head 221 described below to realize the quick connection of the composite pipe 1 and the quick connecting joint 2; the sealing ring 13 prevents the fluid in the pipe from leaking out of the composite pipe 1, and at the same time prevents seawater from entering the composite pipe 1.

[0036] The quick connection joint 2 contains a cylindrical shell 24, the outer periphery of which is uniformly provided with a plurality of hoisting chain upper and lower pin seats 28 for mounting the hoisting chain upper and lower pins 6 and 7 described below.

[0037] As shown in Figure 1 and Figure 2 , a plurality of hoisting chains 3 are installed between adjacent two quick connection joints, the top end of the hoisting chain 3 is hung on the hoisting chain lower pin 7, and is connected to the hoisting chain upper pin 6 of the lower quick connection joint 2 through the middle and bottom supports 4 and 5, that is, the top end of the hoisting chain 3 is hung on the hoisting chain lower pin 7 of the upper quick connection joint 2 of the two adjacent quick connection joints 2, and the bottom end of the hoisting chain 3 is connected to the hoisting chain upper pin 6 of the lower quick connection joint 2 of the two adjacent quick connection joints 2, and the hoisting chain 3 passes through the middle and bottom supports 4 and 5. The middle and bottom support pins 8 and 9 respectively pass through a link of the hoisting chain 3. The positions of the middle and bottom support pins 8 and 9 are accurately designed so that the hoisting chain 3 is not affected by the middle and bottom support pins 8 and 9 in the longitudinal direction during drilling, and the middle and bottom support pins 8 and 9 are not affected by the upward pulling force. The hoisting chain 3 has the following functions: one is to hoist and lower the composite riser; two is to provide a certain weight for the composite riser to enhance the stability of the composite riser in seawater; three is to bear the buoyancy of the composite riser in seawater; four is to constrain the composite pipe 1 when the composite riser is straight in seawater, preventing the composite pipe 1 from swinging and bending in seawater; five is to constrain the hoisting chain 3 when the composite riser is laid flat. Three hoisting chains 3 are preferentially selected, and the scheme of three hoisting chain pin seats 28 and three connector seats 23 is preferentially selected to be spaced and uniformly distributed, so as to effectively constrain the composite pipe 1 and realize the quick connection between the composite risers in seawater, reduce the weight of the composite riser, reduce the cost of the composite riser, simplify the operation of the composite riser, and ensure the safety of the operation. The lengths of the single composite pipe 1 and the hoisting chain 3 are carefully designed so that only the hoisting chain 3 is in tension and bears the weight in seawater, and the composite pipe 1 is not subjected to longitudinal stress (except for buoyancy), so there is no requirement for the longitudinal strength of the composite pipe 1, but the composite pipe 1 is required to have a certain radial strength to cope with the pressure difference inside and outside the pipe. The strength of the hoisting chain 3 is designed according to the buoyancy of the pipe column and the strength of the wind, wave and current in the sea area, and a certain redundancy is considered.

[0038] The top end of the single composite pipe is provided with a quick connection joint 2. The quick connection joint 2 has two functions: one is to quickly connect the composite pipes to form a single composite riser; the other is to quickly connect two adjacent composite risers. The quick connection joint 2 has multiple quick connection modes, such as a handle type quick connector, a rotating buckle, an axial push-pull buckle, etc. The handle type quick connector 21 is preferred.

[0039] For example, as shown in Figures 1 to 3 、 Figures 5 to 7 , the handle type quick connector 21 is installed on the connector support 23 by a hinge pin 25, and the handle type quick connector 21 can rotate around the hinge pin 25. The handle type quick connector 21 comprises a locking head 221, a connecting part 222 and a handle 22, which are integrally formed. The locking end of the locking head 221 is arc-shaped and matches the arc-shaped neck 12 of the joint segment 11. The hinge pin 25 passes through the connecting part 222 and is installed in the hinge pin mounting hole 231. The locking head 221 and the connecting part 222 rotate together with the handle 22. By pulling the handle 22, the locking head 221 engages with the arc-shaped neck 12 of the joint segment 11 through the locking through hole 241 on the shell 24, thereby achieving quick connection or quick unlocking of the composite riser. When the working end of the locking head 221 engages with the arc-shaped neck 12, the quick connection joint 2 is in a locked state; when the working end of the locking head 221 is disengaged from the arc-shaped neck 12, the quick connection joint 2 is in an unlocked state.

[0040] As shown in Figure 6 and Figure 7 , the handle type quick connector 21 also comprises a locking mechanism, which has multiple types, such as an automatic lock pin type, a safety pin type, a buckle type, a zipper type, etc. The automatic lock pin type is preferred. The automatic lock pin type locking mechanism comprises a handle lock pin 26 and a spring 27. The axis of the handle lock pin 26 is parallel to the axis of the hinge pin 25, and the handle lock pin 26 is installed on one side of the connector support 23 through the handle lock pin mounting hole 232. The spring 27 tends to push the handle lock pin 26 towards the handle 22. When the handle lock pin 26 enters the handle lock hole 223, the handle 22 is locked, preventing accidental rotation of the handle 22; pulling the handle lock pin 26 out of the handle lock hole 223 unlocks the handle 22, and the handle 22 can be rotated at this time.

[0041] The connector support 23 is provided with one handle type quick connector 21 on each side, and the two handle type quick connectors 21 are also mirror images of each other. In addition, a sealing gasket 14 is arranged inside the handle type quick connector 21. After the quick connection of the two composite risers is completed, the end face of the composite pipe 1 presses the sealing gasket 14, and the sealing gasket 14 and the sealing ring 13 jointly prevent the fluid in the composite pipe 1 from leaking outwards and prevent seawater from entering the composite pipe 1.

[0042] As shown in Figure 4 The outer circumferential surface of the middle support 4 and the bottom support 5 are respectively provided with a plurality of integrally formed pairs of flanges 41 and single flanges 42. The pairs of flanges 41 on the middle support 4 are used to mount the middle support latch 8, and the pairs of flanges 41 on the bottom support 5 are used to mount the bottom support latch 9.

[0043] In practical application, a certain length of traditional steel riser can be added to the upper and lower ends of the composite riser string to resist wind and current, and the traditional way of connecting the riser tensioner, dry blowout preventer, subsea blowout preventer or subsea wellhead can be used.

[0044] The above is only a specific embodiment of the present application, which cannot limit the scope of the present application, so the replacement of equivalent components or equivalent changes and modifications made within the scope of the present application should still belong to the scope of the present application. In addition, the technical features in the present application can be freely combined with each other, and the technical features can be freely combined with each other.

Claims

1. An offshore drilling composite riser hoisted and restrained with a hoisting chain, characterized by, The composite riser comprises a composite pipe (1), a quick connection joint (2) and a lifting chain (3), two adjacent composite pipes (1) are connected by the quick connection joint (2), and two adjacent quick connection joints (2) are connected by a plurality of lifting chains (3).

2. The offshore drilling composite riser hoisted and restrained with a hoisting chain as defined in claim 1, wherein, The density of the composite tube (1) is 0.7 g / cm 3 ~ 1 g / cm 3 The middle support (4) and the bottom support (5) are arranged on the composite tube (1), and the middle support (4) and the bottom support (5) are integrally formed with the composite tube (1).

3. The offshore drilling composite riser hoisted and restrained with a hoisting chain as defined in claim 2, wherein, The quick connection joint (2) comprises a cylindrical shell (24), and a plurality of lifting chain bolt supports (28) are uniformly arranged on the outer periphery of the shell (24), and a lifting chain upper bolt (6) and a lifting chain lower bolt (7) are arranged at the lower end and the upper end of the lifting chain bolt support (28) respectively. The top end of the lifting chain (3) is hung on the lifting chain lower bolt (7), and the lifting chain (3) is connected to the lifting chain upper bolt (6) of the adjacent quick connection joint (2) below through a middle support (4) and a bottom support (5), and a middle support bolt (8) and a bottom support bolt (9) pass through a link of the lifting chain (3) respectively.

4. The offshore drilling composite riser hoisted and restrained with a hoisting chain as defined in claim 1, wherein, The quick connection joint (2) comprises a handle type quick connector (21) and a connector support (23), and the handle type quick connector (21) is installed on the connector support (23) by a hinge pin (25). The handle type quick connector (21) comprises a locking head (221), a connecting part (222) and a handle (22), and the locking head (221), the connecting part (222) and the handle (22) are integrally formed.

5. The offshore drilling composite riser hoisted and restrained with a hoisting chain as defined in claim 4, wherein, The two ends of the composite pipe (1) are provided with an integrally formed joint section (11), and the joint section (11) comprises an arc-shaped neck (12), the profile of the arc-shaped neck (12) is arc-shaped, and the working end of the locking head (221) is also arc-shaped. When the working end of the locking head (221) is engaged with the arc-shaped neck (12), the quick connection joint (2) is in a locked state; when the working end of the locking head (221) is disengaged from the arc-shaped neck (12), the quick connection joint (2) is in an unlocked state.

6. The offshore drilling composite riser hoisted and restrained with a hoisting chain as defined in claim 5, wherein, The handle type quick connector (21) further comprises a locking mechanism, the locking mechanism is an automatic locking pin type, and the locking mechanism is installed on one side of the connector support (23). The automatic locking pin type locking mechanism comprises a handle locking pin (26) and a spring (27), the spring (27) can provide a restoring force to the handle locking pin (26), when the handle locking pin (26) is inserted into a handle locking hole (223), the handle (22) is in a locked state; when the handle locking pin (26) is pulled out of the handle locking hole (223) outwardly, the handle (22) is in an unlocked state.

7. The offshore drilling composite riser hoisted and restrained with a hoisting chain as defined in claim 4, wherein, The outer periphery of the shell (24) is uniformly provided with a plurality of connector supports (23), and one handle type quick connector (21) is arranged on the upper part and the lower part of each connector support (23), and the two handle type quick connectors (21) are mirror images of each other.

8. The offshore drilling composite riser hoisted and restrained with a hoisting chain as defined in claim 5, wherein, The joint section (11) of the composite pipe (1) comprises two sealing rings (13).

9. The offshore drilling composite riser hoisted and restrained with a hoisting chain as defined in claim 4, wherein, The handle type quick connector (21) is internally provided with a sealing gasket (14), after the quick connection of the two composite water pipes is completed, the end face of the composite pipe (1) extrudes the sealing gasket (14), and the sealing gasket (14) and the sealing ring (13) can jointly prevent the fluid in the composite pipe (1) from leaking outward and prevent seawater from entering the composite pipe (1).

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