CN215565833U - Slip type quick-assembling wellhead joint for riser - Google Patents

Abstract

The application discloses a slip type quick-assembly wellhead joint for a riser, which comprises a joint body, a plurality of slip assemblies and a sealing device, wherein the joint body is of a tubular structure; the slip assemblies are uniformly distributed on the circumferential inner wall of the first end of the joint body so as to jack/break away the marine riser inserted into the first end along the circumferential direction of the joint body; the sealing device is arranged in the connector body far away from the first end, and when the sealing device is in a first state, the sealing device abuts against the outer wall of the riser so as to seal the inner wall of the connector body and the outer wall of the riser; the problem of in current marine oil exploitation, open circuit that the conventional simple and easy well head of well drilling formed is set up on the ocean top layer and creeps into the open circuit and can make the detritus go into the sea and cause the pollution of marine environment and open circuit and creep into the difficult problem that can't guarantee well safety is effectively solved.

Description

Slip type quick-assembling wellhead joint for riser

Technical Field

The application relates to the technical field of oil exploration, in particular to a slip type quick-assembly wellhead joint for a marine riser.

Background

The riser is one of the components of the underwater apparatus for oil exploitation, and is mainly used for isolating seawater, resisting ice, bearing the weight of a wellhead device and leading in a drilling tool and a casing pipe so as to form a channel for slurry circulation; at present, the conventional simple well mouth of the drilling well is arranged on the surface layer of the ocean by adopting the open-circuit drilling of seawater-bentonite slurry for experience drilling.

However, along with the oil field shallow layer oil gas resource exploration in ocean is almost no longer done, the oil field exploration development is carried out and is carried forward to deep stratum and deep sea step by step, and at this moment, the simple and easy well head of ocean surface layer setting drilling conventionality then no longer is suitable for, and open circuit that its formed is crept into can the detritus go into the sea and cause the pollution of marine environment and open circuit and creep into the difficult problem that can't guarantee well safety.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a slip formula fast-assembling well head joint for riser to in solving current marine oil exploitation, open a way that the conventional simple and easy well head of ocean top layer setting drilling formed creeps into the problem that can make the detritus go into the sea and cause the pollution of marine environment and open a way and creep into the difficult problem that can't guarantee well hole safety.

In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:

the present application provides in a first aspect a slip-type quick-install wellhead connector for a riser, comprising

The joint body is of a tubular structure;

the slip assemblies are uniformly distributed on the circumferential inner wall of the first end of the joint body so as to tightly push or separate from a riser along the circumferential direction of the joint body, and the riser is inserted into the first end of the joint body;

the sealing device is arranged in the joint body far away from the first end of the joint body, and when the sealing device is in the first state, the sealing device abuts against the outer wall of the marine riser so as to seal the inner wall of the joint body and the outer wall of the marine riser.

In some modified embodiments of the first aspect of the present application, the slip type quick-install wellhead joint for riser pipe described above, wherein the slip assembly comprises slip pieces and a jackscrew;

the clamping tile is arc-shaped, and the concave side of the clamping tile faces into the joint body;

the jackscrew thread penetrates through the pipe wall of the joint body and is connected to the slip sheets so as to drive the slip sheets to jack up/separate from the marine riser.

In some modified embodiments of the first aspect of the present application, the aforementioned slip type quick-install wellhead joint for riser pipes, wherein the number of slip assemblies is 8;

the radian of the card tile is 38-42 degrees.

In some modified embodiments of the first aspect of the present application, in the slip-type quick-assembly wellhead joint for a riser, a first receiving groove is formed in a circumferential inner wall of the first end of the joint body, and the first receiving groove is adapted to the slip sheet, so that a concave side of the slip sheet in a state of being detached from the riser is flush with an inner surface of the joint body;

slip teeth are arranged on the concave side of the slip clamping piece.

In some modified embodiments of the first aspect of the present application, the aforementioned slip-type quick-install wellhead joint for riser pipes, wherein the sealing means comprises a sealing rubber ring;

the sealing rubber ring is arranged on the circumferential inner wall of the joint body, an accommodating cavity is formed in the sealing rubber ring to accommodate sealing fluid, and when the accommodating cavity is filled with the sealing fluid, the sealing device is in the first state;

a first opening is formed in the pipe wall of the joint body and communicated with the accommodating cavity so as to inject the sealing fluid into the accommodating cavity;

and a second opening is arranged on the pipe wall of the joint body, the second opening is communicated with the accommodating cavity, and the second opening and the first opening are arranged at intervals so as to exhaust gas in the accommodating cavity.

In some modified embodiments of the first aspect of the present application, the slip quick wellhead connector for riser pipe described above, wherein the first opening and the second opening are oppositely disposed along a first radial direction of the connector body;

and a bulge is arranged on the inner wall of the sealing rubber ring, so that when the sealing device is in the first state, the bulge is supported and abutted against the outer wall of the marine riser.

In some modified embodiments of the first aspect of the present application, in the slip-type quick-assembly wellhead joint for a riser, a second accommodating groove is formed in a circumferential inner wall of the joint body, and the second accommodating groove is adapted to the sealing rubber ring to accommodate the sealing rubber ring;

the first opening and the second opening are arranged corresponding to the second accommodating groove.

In some modified embodiments of the first aspect of the present application, the aforementioned slip type quick wellhead joint for riser pipes, wherein the sealing means comprises a first sealing means and a second sealing means;

the first sealing device and the second sealing device are arranged at intervals along the axial direction of the joint body.

In some modified embodiments of the first aspect of the present application, the slip-type quick-assembly wellhead joint for riser further includes two lifting lugs;

the two lifting lugs are oppositely arranged on the outer wall of the joint body along the second radial direction of the joint body;

and a preset included angle is formed between the second radial direction and the first radial direction.

In some modified embodiments of the first aspect of the present application, the slip-type quick-install wellhead joint for riser pipes further comprises a riser pipe;

the riser is disposed at the second end of the fitting body.

Compared with the prior art, the slip type quick-assembly wellhead connector for the marine riser provided by the first aspect of the application realizes the fixation of the inserted marine riser by arranging the slip assemblies on the inner wall of the connector body; meanwhile, a sealing device is arranged in the joint body, so that the sealing after the marine riser is inserted is realized, the formation of closed-circuit drilling is ensured, and drilling mud or rock debris is prevented from entering the sea; the problem of in current marine oil exploitation, open circuit that the conventional simple and easy well head of well drilling formed is set up on the ocean top layer and creeps into the open circuit and can make the detritus go into the sea and cause the pollution of marine environment and open circuit and creep into the difficult problem that can't guarantee well safety is effectively solved.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 schematically illustrates a structural cross-sectional view of a slip-type quick-install wellhead joint for a riser according to an embodiment of the present application;

FIG. 2 schematically illustrates a slip type quick-install wellhead connector and a riser for a riser according to an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating a structure of a slip sheet in a slip type quick assembly wellhead joint for a riser according to an embodiment of the present application;

FIG. 4 schematically illustrates a cross-sectional view of FIG. 3 along direction A-A;

the reference numbers illustrate: the joint comprises a joint body 1, a first accommodating groove 11, a first opening 12, a second opening 13, a second accommodating groove 14, a slip assembly 2, a slip piece 21, a jackscrew 22, a stepped groove 23, slip teeth 24, a sealing device 3, a sealing rubber ring 31, an accommodating cavity 32, a convex part 33, a lifting lug 4 and a lifting pipe 5.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.

In order to solve the technical problems, the general idea of the embodiment of the application is as follows:

example 1

Referring to fig. 1, a slip type quick-assembly wellhead joint for a riser provided by an embodiment of the present application includes a joint body 1, a plurality of slip assemblies 2, and a sealing device 3;

the joint body 1 is of a tubular structure; the slip assemblies 2 are uniformly distributed on the circumferential inner wall of the first end of the joint body 1 so as to be tightly propped or separated from a riser (not shown in the figure) along the circumferential direction of the joint body 1, and the riser is inserted into the first end of the joint body; the sealing device 3 is arranged in the joint body 1 far away from the first end of the joint body, and when the sealing device 3 is in the first state, the sealing device 3 abuts against the outer wall of the riser so as to seal the inner wall of the joint body 1 and the outer wall of the riser.

Specifically, as the exploration of oil and gas resources in the shallow layer of the Bohai sea oil field is exhausted, the marine oil exploration and development is gradually advancing to the deep stratum and the deep sea, aiming at the common well depth structure of the Bohai sea oil field: in the development well of 24 ' marine riser +17-1/2 ' borehole x 13-3/8 ' casing +12-1/4 ' borehole x 9-5/8 ' casing +8-1/2 ' borehole x 7 ' casing, the marine riser is generally hammered in by adopting a hammering-in method, the former open sea water-bentonite slurry mode cannot adapt to the surface deep drilling technology, meanwhile, based on the environmental emphasis of the state, in order to solve the problems that in the existing marine oil exploitation, the open circuit drilling formed by the conventional simple well head of the drilling well arranged on the surface layer of the sea can cause the rock debris to enter the sea to cause the pollution of the marine environment and the open circuit drilling cannot ensure the safety of the borehole, the slip type quick-assembling well head joint for the marine riser provided by the embodiment of the application is characterized in that the slip component 2 is arranged in the joint body 1 to surround and fix the marine riser, and when the sealing device 2 is arranged in the first state by the sealing device 2, the sealing device 2 is abutted against the outer wall of the riser so as to seal the inner wall of the connector body 1 and the outer wall of the riser and ensure a closed drilling mode.

Wherein the joint body 1 is a rigid tubular structure, such as: the steel structure is a circular tube structure, and the first end and the second end of the steel structure are respectively used for connecting a riser (not shown in the figure) and a blowout preventer (not shown in the figure), which can be easily understood by those skilled in the art and are not described herein in detail.

The slip assemblies 2 are uniformly distributed along the circumferential inner wall of the joint body 1, the slip assemblies 2 can stretch out and draw back along the radial direction of the joint body 1, and therefore when the slip assemblies 2 move towards the center of the joint body 1 at the same time, the circumferential outer wall of a marine riser inserted into the joint body 1 is tightly jacked by the slip assemblies 1 in an environment-friendly manner, and the marine riser is guaranteed not to move relatively in the joint body 1; correspondingly, work as a plurality of slips subassembly 2 are simultaneously to keeping away from when connecting the direction motion of body 1, a plurality of slips subassemblies 1 all break away from with the contact of marine riser, and then the marine riser is in relative motion can take place in connecting body 1, demolish or operation such as maintenance.

Wherein, sealing device 3 sets up slips subassembly 2's top, inserts as the riser after connecting body 1, a plurality of slips subassemblies 2 are right the riser encircles and pushes up tightly, sealing device 3 becomes to obtain the first state and makes the outer wall of sealing device and riser carry out closely contradicting for connect and form one set of airtight circulation system between body 1 second end and the riser, drilling fluid can realize cyclic utilization.

According to the slip type quick-assembly wellhead connector for the marine riser, the slip type quick-assembly wellhead connector for the marine riser is characterized in that a plurality of slip assemblies 2 are arranged on the inner wall of a connector body 1, so that the inserted marine riser is fixed; meanwhile, a sealing device 3 is arranged in the joint body 1, so that the sealing after the marine riser is inserted is realized, the formation of closed-circuit drilling is ensured, and drilling mud or rock debris is prevented from entering the sea; the problem of in current marine oil exploitation, open circuit that the conventional simple and easy well head of well drilling formed is set up on the ocean top layer and creeps into the open circuit and can make the detritus go into the sea and cause the pollution of marine environment and open circuit and creep into the difficult problem that can't guarantee well safety is effectively solved.

The term "and/or" herein is merely an associative relationship describing an associated object, meaning that three relationships may exist, e.g., a and/or B, specifically understood as: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.

Further, referring to fig. 1 and 3, in an embodiment of the slip type quick-assembly wellhead joint for a riser, provided by the application, the slip assembly 2 includes a slip piece 21 and a jackscrew 22;

the clamping tile piece 21 is arc-shaped, and the concave side of the clamping tile piece 21 faces the inside of the joint body 1;

the jackscrew 22 penetrates through the pipe wall of the joint body 1 and is connected to the clamping piece 21 so as to drive the clamping piece 21 to jack up/separate from the marine riser.

Specifically, in order to achieve the effect that the slip assembly 2 can be extended and retracted along the radial direction of the joint body 1, the slip assembly 2 is provided in this embodiment to include the slip segments 21 and the jackscrews 22; the clamping tile piece 21 is arc-shaped, the concave side of the clamping tile piece 21 faces the inner side of the connector body 1, and the outer wall of the marine riser can be attached and encircled; the jackscrew 22 penetrates through the pipe wall of the joint body 1 and is connected to the protruding side of the tile clamping piece 21, preferably the center position of the protruding side of the tile clamping piece 21, so that when the jackscrew 22 is screwed into the pipe wall of the joint body 1, the tile clamping piece 21 is pushed into the joint body 1 by the jackscrew 22 to be close to and tightly propped against the outer wall of the riser, the riser is tightly propped by the slip assemblies 2 at the same time, the riser is circumferentially embraced and tightly propped, and relative movement cannot occur in the joint body 1; on the contrary, when the riser and the joint body 1 need to be disassembled, the pipe wall of the joint body 1 is screwed out through the jackscrew 22, and then the clamping piece 21 is driven to be separated from the riser.

The connection mode of the jackscrew 22 and the card tile 21 is not limited too much here, and may be fixed welding, or may be a card connection as shown in fig. 3: the central part of the convex side of the card tile 21 is provided with a step-shaped groove 23 facing the concave side of the card tile 21, the step-shaped part is arranged along the radial direction of the connector body 1, one side of the step-shaped groove 23 facing the sealing device 2 is provided with an opening, the end part of the corresponding jackscrew 22 is matched with the step-shaped groove 23, and then the jackscrew 22 can be clamped into the step-shaped groove 23 through the opening of the step-shaped groove 23, and the step-shaped part of the step-shaped groove 23 is arranged along the radial direction of the connector body 1, so that the jackscrew 22 can be tightly connected with the card tile 21 along the radial direction of the connector body 1; the opening of the stepped groove 23 can also facilitate the installation and the disassembly of the jackscrew 22.

Further, referring to fig. 1, in a specific implementation of the slip type quick-assembly wellhead connector for a riser according to the embodiment of the present application, a first receiving groove 11 is formed in a circumferential inner wall of a first end of the connector body 1, and the first receiving groove 11 is adapted to the slip piece 21, so that an inner concave side of the slip piece 21 in a state of being separated from the riser is flush with an inner surface of the connector body 1;

wherein, the concave side of the tile clamping piece 21 is provided with a slip 24.

Specifically, in order to ensure the overall size of the joint body 1 and realize stable surrounding of the riser, in this embodiment, the first receiving groove 11 is provided on the circumferential inner wall of the joint body 1 to provide an installation position for the slip sheet 21, and the first receiving groove 11 may be continuously provided along the circumferential inner wall of the joint body 1 or may be provided in a sectional manner corresponding to the slip assembly 2; the clamping tile 21 is accommodated in the first accommodating groove 11, and therefore when the clamping tile 21 does not need to tightly jack the marine riser, the clamping tile 21 can be placed in the first accommodating groove 11, the space in the joint body 1 cannot be reduced, and the normal insertion of the marine riser cannot be influenced; referring to fig. 3 and 4, the slip segments 24 are disposed on the concave side of the slip sheet 21 to increase the friction between the slip sheet 21 and the riser, thereby enhancing the stability of propping or embracing.

Further, in the slip type quick-assembly wellhead joint for the riser provided by the embodiment of the application, in specific implementation, the number of the slip assemblies 2 is 8; the radian of the card tile 21 is 38-42 degrees.

Specifically, in order to ensure the fixing strength of the riser and the convenience of adjustment, in this embodiment, the number of the slip assemblies 2 is set to 8, 2 opposite slip assemblies 2 are respectively arranged along four equally-divided radial directions of the joint body 1, and the slip assemblies 2 are arranged in pairs in an opposite manner, so that flexible adjustment is realized, and the problem of non-coaxial of the riser and the joint body 1 caused when the slip assemblies 2 are adjusted can be avoided; meanwhile, when the number of the slip assemblies 2 is set to be 8, the radian of each slip sheet 21 does not exceed 45 degrees, and 38-42 degrees are obtained through a large number of tests and are set as a better radian, so that encircling jacking of the marine riser in the circumferential direction can be guaranteed, flexible movement of the slip sheets 21 is not influenced, and the problem of stress concentration caused by single-point jacking of the marine riser due to over-small radian is avoided; of course, it is to be understood that: the setting number of the slip assemblies 2 can be set according to actual needs, such as: the two slip assemblies 2 are oppositely arranged, so that the radian of each slip piece 21 does not exceed 180 degrees; another example is: three slip assemblies 2 evenly distributed, the arc of each slip segment 21 must not exceed 120 degrees.

Further, referring to fig. 1, in an embodiment of the slip type quick-assembly wellhead joint for a riser, provided by the application, in a specific implementation, the sealing device 3 includes a sealing rubber ring 31;

the sealing rubber ring 31 is arranged on the circumferential inner wall of the joint body 1, an accommodating cavity 32 is formed in the sealing rubber ring 31 to accommodate sealing fluid, and when the accommodating cavity 32 is filled with the sealing fluid, the sealing device 2 is in the first state;

a first opening 12 is arranged on the pipe wall of the joint body 1, and the first opening 12 is communicated with the accommodating cavity 32 so as to inject the sealing fluid into the accommodating cavity 32;

the pipe wall of the joint body 1 is provided with a second opening 13, the second opening 13 is communicated with the accommodating cavity 32, and the second opening 13 and the first opening 12 are arranged at intervals to exhaust gas in the accommodating cavity 32.

Specifically, in order to realize tight interference of the sealing device 2 against the riser, in this embodiment, the sealing device 2 is configured to include the sealing rubber ring 31, the sealing rubber ring 31 is specifically a BT sealing ring, which is an annular rubber ring adapted to the joint body 1, and the accommodating cavity 32 is provided along the circumferential inside thereof, and after the riser is inserted into the joint body 1, the sealing fluid is injected into the accommodating cavity 32 through the first opening 12, for example: the oil body further supports the outer wall of the sealing rubber ring 31, so that the sealing rubber ring is tightly abutted against the outer wall of the marine riser, and sealing is further realized; the second opening 13 is matched with the first opening 12, when the sealing fluid is injected into the first opening 12, the second opening 13 exhausts the original gas in the accommodating cavity 32 until the accommodating cavity 32 is filled with the sealing fluid, and when the sealing fluid leaks out of the first opening 12 and/or the second opening 23, the sealing rubber ring 31 is in the first state and is expanded to the maximum size, at this time, the first opening 12 and the second opening 13 can be blocked by an external plug, the internal sealing fluid is prevented from flowing out, and the sealing rubber ring 31 is kept in the first state until the marine riser is disassembled; the disassembly process is that the jackscrew 22 is unscrewed, the sealing fluid in the accommodating cavity 32 is discharged, the riser is driven by the blowout preventer to move upwards to separate the riser through the slip type quick coupler, and then subsequent seat ring plates, sleeve installation and the like are carried out on the riser, so that the installation and disassembly time is short, the operation time is high, the manual operation is convenient, the marine drilling period is effectively shortened, and the marine drilling time is improved.

Further, referring to fig. 1, in an embodiment of the slip type quick assembly wellhead joint for a riser provided by the present application, in a specific implementation, the first opening 12 and the second opening 13 are disposed opposite to each other along a first radial direction of the joint body 1;

the inner wall of the sealing rubber ring 31 is provided with a protruding part 33, so that when the sealing device 2 is in the first state, the protruding part 33 is supported and abutted against the outer wall of the marine riser.

Specifically, in order to ensure that the second opening 13 can exhaust air without affecting the injection of the sealing fluid, in this embodiment, the first opening 12 and the second opening 13 are arranged to be opposite to each other in the first radial direction of the joint body 1, so that the distance between the two openings is the largest, and the problem that the sealing fluid flows out without reaching the first state after being injected can be solved; meanwhile, in the embodiment, the inner wall of the sealing rubber ring 31 is provided with the protruding portion 33, so that when the sealing rubber ring 31 is in the first state, the protruding portion 33 is synchronously supported, and can be more tightly abutted against the outer wall of the marine riser.

Further, referring to fig. 1, in a specific implementation of the slip type quick-assembly wellhead connector for a riser provided in the embodiment of the present application, a second receiving groove 14 is formed in a circumferential inner wall of the connector body 1, and the second receiving groove 14 is adapted to the seal rubber ring 31 to receive the seal rubber ring 31;

the first opening 12 and the second opening 13 are disposed corresponding to the second receiving groove 14.

Specifically, the overall size of the joint body 1 is ensured, and stable sealing of the marine riser is realized, in this embodiment, the second accommodating groove 14 is arranged on the circumferential inner wall of the joint body 1 to provide an installation position for the sealing rubber ring 31, and the second accommodating groove 14 is continuously arranged along the circumferential inner wall of the joint body 1 corresponding to the sealing rubber ring 31; the sealing rubber ring 31 is accommodated in the second accommodating groove 14, and further when the sealing rubber ring 31 is not propped up by the sealing fluid, the sealing rubber ring 31 can be placed in the second accommodating groove 14, so that the space in the joint body 1 cannot be reduced, and the normal insertion of the marine riser cannot be influenced; referring to fig. 1 and 2, the first opening 12 and the second opening 13 are disposed corresponding to the second receiving groove 14, and then only the bottom of the second receiving groove 14 needs to be opened, which greatly reduces the difficulty of opening.

Further, referring to fig. 1 and 2, in an embodiment of the slip type quick-assembly wellhead joint for a riser, provided by the application, the sealing device 2 includes a first sealing device and a second sealing device;

the first sealing device and the second sealing device are arranged at intervals along the axial direction of the joint body 1.

Specifically, in order to ensure the sealing performance after the joint body 1 is connected with the marine riser, in this embodiment, a first sealing device and a second sealing device are arranged at an interval in the joint body 1 away from the first end, and two sets of sealing structures are used to improve the sealing performance; the first sealing device and the second sealing device have the same structure, please refer to the above detailed description of the sealing rubber ring 31 and the accommodating cavity 32, and will not be described in detail herein.

Further, referring to fig. 1 and fig. 2, in a specific implementation, the slip type quick-assembly wellhead connector for a riser according to the embodiment of the present application further includes two lifting lugs 4;

the two lifting lugs 4 are oppositely arranged on the outer wall of the joint body 1 along the second radial direction of the joint body 1;

and a preset included angle is formed between the second radial direction and the first radial direction.

Specifically, in order to facilitate movement of the slip type quick assembly wellhead joint for the riser and connection of the riser, in this embodiment, two lifting lugs 4 are arranged on the outer wall of the joint body 1 in the second radial direction, and each lifting lug 4 is provided with a lifting hole so as to realize lifting movement and transportation of the slip type quick assembly wellhead joint for the riser; the lifting lug 4 is a rigid structure, such as: a steel structure which can be connected to the joint body 1 by a thread or by welding, without being limited too much; in order to avoid interference between the lifting lug 4 and the first opening 12 and/or the second opening 13, and facilitate operation of an operator, in this embodiment, the second radial direction in which the lifting lug 4 is disposed and the first radial direction in which the first opening 12 and the second opening 13 are disposed are set to form a preset included angle, for example: 45 degrees, so that the lifting lug 4 is mutually separated from the first opening 12 and the second opening 13, and an enough operation position is reserved for an operator; of course, it is to be understood that: in order to show the lifting lug 4, the first opening 12 and the second opening 13 simultaneously, fig. 1 and 2 show the lifting lug 4, the first opening 12 and the second opening 13 at the same angle, which is a schematic illustration, but the actual manufacturing is performed at intervals according to the included angle.

Further, referring to fig. 1 and fig. 2, in a specific implementation, the slip type quick-assembly wellhead connector for a riser according to the embodiment of the present application further includes a riser 5;

the riser pipe 5 is arranged at the second end of the joint body 1 for connection to a blowout preventer (not shown).

Specifically, in order to meet the construction standard and ensure the service life of the slip type quick-assembly wellhead joint for the riser, in this embodiment, the lifting pipe 5 is disposed at the second end of the joint body 1, and the lifting pipe 5 and the second end of the joint body 1 are welded to each other so as to extend the connecting end of the joint body 1 and facilitate connection of the blowout preventer.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a slip formula fast-assembling well head joint for riser which characterized in that, it includes:

the joint body is of a tubular structure;

the slip assemblies are uniformly distributed on the circumferential inner wall of the first end of the joint body so as to tightly push or separate from a riser along the circumferential direction of the joint body, and the riser is inserted into the first end of the joint body;

the sealing device is arranged in the joint body far away from the first end of the joint body, and when the sealing device is in the first state, the sealing device abuts against the outer wall of the marine riser so as to seal the inner wall of the joint body and the outer wall of the marine riser.

2. The slip type quick-assembling wellhead joint for risers of claim 1, wherein:

the slip assembly comprises a slip sheet and a jackscrew;

the clamping tile is arc-shaped, and the concave side of the clamping tile faces into the joint body;

the jackscrew thread penetrates through the pipe wall of the joint body and is connected to the slip sheets so as to drive the slip sheets to jack up/separate from the marine riser.

3. The slip type quick-assembling wellhead joint for risers of claim 2, wherein:

the number of the slip assemblies is 8;

the radian of the card tile is 38-42 degrees.

4. The slip type quick-assembling wellhead joint for risers of claim 2, wherein:

a first accommodating groove is formed in the circumferential inner wall of the first end of the joint body and is matched with the slip sheet, so that the inner concave side of the slip sheet in a state of being separated from the marine riser is flush with the inner surface of the joint body;

slip teeth are arranged on the concave side of the slip clamping piece.

5. The slip type quick-assembling wellhead joint for risers of claim 1, wherein:

the sealing device comprises a sealing rubber ring;

the sealing rubber ring is arranged on the circumferential inner wall of the joint body, an accommodating cavity is formed in the sealing rubber ring to accommodate sealing fluid, and when the accommodating cavity is filled with the sealing fluid, the sealing device is in the first state;

a first opening is formed in the pipe wall of the joint body and communicated with the accommodating cavity so as to inject the sealing fluid into the accommodating cavity;

and a second opening is arranged on the pipe wall of the joint body, the second opening is communicated with the accommodating cavity, and the second opening and the first opening are arranged at intervals so as to exhaust gas in the accommodating cavity.

6. The slip type quick-assembling wellhead joint for risers of claim 5, wherein:

the first opening and the second opening are oppositely arranged along a first radial direction of the joint body;

and a bulge is arranged on the inner wall of the sealing rubber ring, so that when the sealing device is in the first state, the bulge is supported and abutted against the outer wall of the marine riser.

7. The slip type quick-assembling wellhead joint for risers of claim 5, wherein:

a second accommodating groove is formed in the circumferential inner wall of the joint body and is matched with the sealing rubber ring so as to accommodate the sealing rubber ring;

the first opening and the second opening are arranged corresponding to the second accommodating groove.

8. The slip type quick-assembling wellhead joint for risers of claim 5, wherein:

the sealing device comprises a first sealing device and a second sealing device;

the first sealing device and the second sealing device are arranged at intervals along the axial direction of the joint body.

9. The slip type quick-assembling wellhead joint for risers of claim 6, wherein:

the lifting device also comprises two lifting lugs;

the two lifting lugs are oppositely arranged on the outer wall of the joint body along the second radial direction of the joint body;

and a preset included angle is formed between the second radial direction and the first radial direction.

10. The slip type quick-assembling wellhead joint for risers of claim 1, wherein:

the device also comprises a lifting pipe;

the riser is disposed at the second end of the fitting body.

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