CN115899406A - High-pressure fracturing rotary joint for acidizing fracturing operation - Google Patents
High-pressure fracturing rotary joint for acidizing fracturing operation Download PDFInfo
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- CN115899406A CN115899406A CN202310219954.0A CN202310219954A CN115899406A CN 115899406 A CN115899406 A CN 115899406A CN 202310219954 A CN202310219954 A CN 202310219954A CN 115899406 A CN115899406 A CN 115899406A
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- movable joint
- main body
- fracturing
- joint
- fixed
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- 238000007789 sealing Methods 0.000 claims abstract description 60
- 230000003628 erosive effect Effects 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims description 33
- 239000004519 grease Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 10
- 210000002445 nipple Anatomy 0.000 claims description 7
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 10
- 210000001503 joint Anatomy 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
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Abstract
The invention discloses a high-pressure fracturing rotary joint for acidizing fracturing operation, which relates to the technical field of acidizing fracturing operation and comprises a fixed joint, a movable joint, an erosion flange I, an erosion flange II, a rotary component and a sealing component; the fixed joint is connected with the movable joint through the rotating component, so that the movable joint can rotate freely; the mechanical rocker arm is connected with the mechanical rocker arm on the fracturing operation manifold truck through the rotary joint, so that the mechanical rocker arm can rotate in multiple degrees of freedom relative to the fracturing well, only one joint can be suitable for the fracturing well under various environmental terrains, the problem that the steel union pipeline is complex to install and disassemble on site is solved, the labor intensity on site is reduced, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of acidizing and fracturing operations, in particular to a high-pressure fracturing rotary joint for acidizing and fracturing operations.
Background
With the increasing development technology and means of new wells of oil and gas fields and the vigorous popularization of shale oil shale gas resource exploitation, the application of the acidizing and fracturing operation is more and more extensive in recent years. At present, during on-site fracturing operation, a fracturing wellhead is in butt joint with a fracturing fluid output end mainly through a steel union pipeline, and in the butt joint process, a large number of steel union pipelines in various forms such as a straight pipe, a bent pipe and a manifold pipeline are often required to be arranged according to terrain environments, so that on-site installation operation is complex and cumbersome, and management is inconvenient.
In a cluster well fracturing site, the fracturing pipeline is usually removed and reinstalled in the next fracturing well after the completion of the fracturing operation in one well. Repeated disassembly and assembly operations bring heavy operation tasks to a fracturing site, and a large amount of manpower, material resources and financial resources are consumed.
Disclosure of Invention
The invention aims to provide a high-pressure fracturing rotary joint for acidizing fracturing operation, which aims to solve the problems in the prior art, and the mechanical rocker arm on a fracturing operation manifold truck is connected through the rotary joint, so that the mechanical rocker arm can rotate in multiple degrees of freedom relative to a fracturing well, only one joint can be suitable for the fracturing well under various environmental terrains, the problem that the on-site steel union pipeline is complex to install and disassemble is solved, the on-site labor intensity is reduced, and the working efficiency is improved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a high-pressure fracturing rotary joint for acidizing fracturing operation, which comprises a fixed joint, a movable joint, an erosion flange I, an erosion flange II, a rotary component and a sealing component, wherein the fixed joint is fixedly connected with the movable joint;
the fixed joint comprises a tubular fixed joint main body and a movable joint interface arranged on one side of the fixed joint main body, one end of the fixed joint main body is a fixed joint fracturing fluid inlet end, the other end of the fixed joint main body is provided with a first erosion flange, and the movable joint interface is a fixed joint fracturing fluid outlet end;
the movable joint comprises a tubular movable joint main body and a pipeline interface arranged on one side of the movable joint main body, one end of the movable joint main body is connected with the movable joint interface on the fixed joint through the rotating assembly, the rotating assembly enables the movable joint to rotate relative to the fixed joint, one end of the movable joint main body, which is connected with the movable joint interface, is a movable joint fracturing fluid inlet end, the other end of the movable joint main body is provided with the erosion flange II, and the pipeline interface is a movable joint fracturing fluid outlet end;
the joint of the movable joint interface and the movable joint main body is sealed through a sealing assembly.
Preferably, the first erosion flange and the fixed joint main body are sealed through a metal sealing gasket ring, and the first erosion flange and the fixed joint main body are connected through a bolt.
Preferably, the second erosion flange and the movable joint main body are sealed through a second metal sealing gasket ring, and the second erosion flange and the movable joint main body are connected through a bolt.
Preferably, rotating assembly includes thrust spherical roller bearing, the solid fixed ring of bearing, tight cap, rotary seal spare and grease nipple, the solid fixed ring of bearing pass through locking screw one install in the activity connects in the main part, thrust spherical roller bearing install in on the solid fixed ring of bearing, tight cap cover is located thrust spherical roller bearing's outside, thrust spherical roller bearing passes through tight cap with the fixed axial position of bearing fixed ring, tight cap one end with the outer wall threaded connection of activity joint interface, and fixed through locking screw two, tight cap the other end with swing joint between the activity connects the body.
Preferably, a grease nipple is arranged on the outer wall of the locking cap and used for injecting lubricating grease into the thrust spherical roller bearing, and the rotary sealing element is arranged inside the rotary assembly.
Preferably, the rotary sealing element includes set up in the inner wall of activity joint interface with sealing washer one between the solid fixed ring's of bearing outer wall, set up in tight cap with sealing washer two between the activity joint body with set up in the solid fixed ring's of bearing inner wall with sealing washer three between the outer wall of activity joint body.
Preferably, the seal assembly comprises an axial seal disposed between an outer wall of the movable joint body and an inner wall of the movable joint interface and a radial seal disposed between a forward end face of the movable joint body and a shoulder inside the movable joint interface.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the high-pressure fracturing rotary joint for acidizing fracturing operation is arranged on a mechanical rocker arm on a fracturing operation manifold truck, and can rotate with multiple degrees of freedom under the action of the rotary joint in a fracturing operation mode, so that a fracturing fluid channel attached to the rocker arm can swing at multiple angles, the rotary joint is equivalent to the joint of a fracturing fluid pipeline, a specific interface in butt joint with a wellhead is arranged at the terminal of the fracturing fluid pipeline, the interface can be in butt joint with the fracturing wellhead quickly and conveniently, the steel union pipeline is prevented from being mounted and dismounted again, the field labor intensity is reduced, and the working efficiency is improved. And the installation of excessive steel union pipelines on site is avoided, so that the site management is safer and more convenient.
2. According to the high-pressure fracturing rotary joint for acidizing fracturing operation, the fracturing buffer cavities are arranged in the internal channels of the fixed joint and the movable joint, so that the scouring of fracturing fluid to the inner hole of the pipeline is greatly reduced. The tip of fracturing cushion chamber is provided with the erosion flange, prevents the damage of fracturing trunk line to can realize convenient change, reduce cost. And metal sealing is adopted between the erosion flange and the main pipeline, so that the sealing effect and the sealing grade are improved.
3. According to the high-pressure fracturing rotary joint for acidizing fracturing operation, under the action of the rotary component, the movable joint can freely rotate for 360 degrees, and the mechanical rocker arm can be completely freely connected with a plurality of well mouths through rotation. After the connection is completed, one well can be freely swung to the next well. Meanwhile, the problems of butt joint obstacle and the like caused by terrain can be solved.
4. According to the high-pressure fracturing rotary joint for acidizing fracturing operation, the thrust spherical roller bearing is installed in the rotary component, so that the bearing can bear double acting forces in the axial direction and the radial direction.
5. According to the high-pressure fracturing rotary joint for acidizing fracturing operation, the axial sealing element and the radial sealing element are arranged between the fixed joint and the movable joint, so that the sealing effect during rotation can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic perspective view of a high pressure frac swivel for use in acid fracturing operations according to the present invention;
FIG. 2 is a running view of the fracturing fluid of the high pressure fracturing swivel of the present invention used in an acid fracturing operation;
FIG. 3 is a cross-sectional view of a high pressure frac swivel in the present invention for use in acid fracturing operations;
FIG. 4 is a partial view of the rotating assembly of the present invention;
in the figure: 1-fixed joint, 2-first erosion flange, 3-second erosion flange, 4-first metal sealing backing ring, 5-second metal sealing backing ring, 6-movable joint, 7-second locking screw, 8-first sealing ring, 9-grease nipple, 10-thrust spherical roller bearing, 11-tightening cap, 12-second sealing ring, 13-bearing fixing ring, 14-first locking screw, 15-third sealing ring, 16-axial sealing piece, 17-radial sealing piece, 18-rotating component, 19-inlet end of fracturing fluid of fixed joint, 20-buffer cavity of fracturing fluid of fixed joint, 21-outlet end of fracturing fluid of fixed joint, 22-inlet end of fracturing fluid of movable joint, 23-buffer cavity of fracturing fluid of movable joint, 24-outlet end of fracturing fluid of movable joint, 25-interface of movable joint and 26-pipeline interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a high-pressure fracturing rotary joint for acidizing fracturing operation, which aims to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The high-pressure fracturing swivel joint for acidizing fracturing operation in the embodiment, as shown in fig. 1-4, comprises a fixed joint 1, a movable joint 6, an erosion flange I2, an erosion flange II 3, a swivel assembly 18 and a sealing assembly;
the fixed joint 1 comprises a tubular fixed joint main body and a movable joint interface 25 arranged on one side of the fixed joint main body, one end of the fixed joint main body is a fixed joint fracturing fluid inlet end 19, the other end of the fixed joint main body is provided with an erosion flange I2, and the movable joint interface 25 is a fixed joint fracturing fluid outlet end 21;
the movable joint 6 comprises a tubular movable joint main body and a pipeline interface 26 arranged on one side of the movable joint main body, one end of the movable joint main body is connected with a movable joint interface 25 on the fixed joint 1 through a rotating assembly 18, the rotating assembly 18 enables the movable joint 6 to rotate relative to the fixed joint 1, one end of the movable joint main body, which is connected with the movable joint interface 25, is a movable joint fracturing fluid inlet end 22, the other end of the movable joint main body is provided with a second erosion flange 3, and the pipeline interface 26 is a movable joint fracturing fluid outlet end 24;
the connection of the movable joint interface 25 and the movable joint body is sealed by a sealing assembly.
In this embodiment, through setting up erosion flange one 2 and erosion flange two 3, make fixed joint 1 and the inside fracturing cushion chamber that all forms of movable joint 6, the purpose of fracturing cushion chamber design is in order to reduce the hydraulic pressure operation in-process, and fracturing fluid is to the erodeing of fixed joint 1, the 6 inner chambers of movable joint. The erosion flange I2 and the erosion flange II 3 are used as direct erosion parts of the fracturing fluid, and have the advantages of erosion resistance, easiness in maintenance and replacement. After being damaged to a certain degree, the movable support can be directly detached and replaced, and the field maintenance is convenient.
During operation, fracturing fluid enters the rotary joint cavity from the fixed joint fracturing fluid inlet end 19, is firstly buffered by the fixed joint fracturing fluid buffer cavity 20 and enters the movable joint fracturing fluid inlet end 22 through the fixed joint fracturing fluid outlet end 21, then enters the movable joint fracturing fluid buffer cavity 23 for buffering, enters the movable joint fracturing fluid outlet end 24 to discharge the rotary joint, and enters a pipeline of the next step.
In the embodiment, the erosion flange I2 and the fixed joint main body are sealed by the metal sealing gasket I4, and the erosion flange I2 and the fixed joint main body are connected by the bolt; the second erosion flange 3 and the movable joint main body are sealed through a second metal sealing gasket ring 5, and the second erosion flange 3 and the movable joint main body are connected through a bolt; the first metal sealing gasket ring 4 and the second metal sealing gasket ring 5 have the advantages of good sealing effect, high sealing pressure grade and the like.
In this embodiment, the rotating assembly 18 includes a thrust spherical roller bearing 10, a bearing fixing ring 13, a locking cap 11, a rotating sealing element and a grease nipple 9, the bearing fixing ring 13 provides a mounting and bearing profile for the bearing, the bearing is mounted on the movable joint main body through a locking screw one 14, the thrust spherical roller bearing 10 is mounted on the bearing fixing ring 13, the locking cap 11 is sleeved outside the thrust spherical roller bearing 10, the thrust spherical roller bearing 10 fixes an axial position through the locking cap 11 and the bearing fixing ring 13, one end of the locking cap 11 is in threaded connection with the outer wall of the movable joint interface 25 and is fixed through a locking screw two 7, and the other end of the locking cap 11 is movably connected with the movable joint main body; the grease nipple 9 is arranged on the outer wall of the tight cap 11 and used for injecting lubricating grease into the thrust spherical roller bearing 10, and the rotary sealing element is arranged inside the rotary assembly 18 and used for preventing the lubricating grease from leaking outwards and preventing external sundries from entering the bearing space and damaging the bearing.
In this embodiment, the rotary sealing element includes a first sealing ring 8 disposed between the inner wall of the movable joint connector 25 and the outer wall of the bearing fixing ring 13, a second sealing ring 12 disposed between the locking cap 11 and the movable joint body, and a third sealing ring 15 disposed between the inner wall of the bearing fixing ring 13 and the outer wall of the movable joint body.
In this embodiment, the sealing assembly includes an axial sealing element 16 disposed between the outer wall of the movable joint main body and the inner wall of the movable joint connector 25, and a radial sealing element 17 disposed between the front end surface of the movable joint main body and the shoulder inside the movable joint connector 25, and both the axial sealing element 16 and the radial sealing element 17 may be rubber sealing rings for sealing the pressure in the passage during acid fracturing.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (7)
1. A high pressure fracturing swivel for acidizing fracturing operations which characterized in that: the device comprises a fixed joint, a movable joint, an erosion flange I, an erosion flange II, a rotating assembly and a sealing assembly;
the fixed joint comprises a tubular fixed joint main body and a movable joint interface arranged on one side of the fixed joint main body, one end of the fixed joint main body is a fixed joint fracturing fluid inlet end, the other end of the fixed joint main body is provided with a first erosion flange, and the movable joint interface is a fixed joint fracturing fluid outlet end;
the movable joint comprises a tubular movable joint main body and a pipeline interface arranged on one side of the movable joint main body, one end of the movable joint main body is connected with the movable joint interface on the fixed joint through the rotating assembly, the rotating assembly enables the movable joint to rotate relative to the fixed joint, one end of the movable joint main body, which is connected with the movable joint interface, is a movable joint fracturing fluid inlet end, the other end of the movable joint main body is provided with the erosion flange II, and the pipeline interface is a movable joint fracturing fluid outlet end;
the joint of the movable joint interface and the movable joint main body is sealed through a sealing assembly.
2. The high pressure fracturing swivel for acid fracturing operations of claim 1, wherein: the first erosion flange and the fixed joint main body are sealed through a metal sealing gasket ring, and the first erosion flange and the fixed joint main body are connected through a bolt.
3. The high pressure fracturing swivel for acid fracturing operations of claim 1, wherein: the second erosion flange and the movable joint main body are sealed through a second metal sealing gasket ring, and the second erosion flange and the movable joint main body are connected through bolts.
4. The high pressure fracturing swivel for acid fracturing operations of claim 1, wherein: the rotating assembly comprises a thrust spherical roller bearing, a bearing fixing ring, a tightening cap, a rotating sealing element and a grease nipple, wherein the bearing fixing ring is installed in the movable joint main body through a locking screw, the thrust spherical roller bearing is installed in the bearing fixing ring, the tightening cap is sleeved on the outer portion of the thrust spherical roller bearing, the thrust spherical roller bearing passes through the tightening cap and the bearing fixing ring, the axial position is fixed by the bearing fixing ring, one end of the tightening cap is in threaded connection with the outer wall of the movable joint interface and is fixed through a locking screw, and the other end of the tightening cap is movably connected between the movable joint bodies.
5. The high pressure fracturing swivel for acid fracturing operations of claim 4, wherein: and a grease nipple is arranged on the outer wall of the tightening cap and used for injecting lubricating grease into the thrust spherical roller bearing, and the rotary sealing element is arranged in the rotary assembly.
6. The high pressure fracturing swivel for acid fracturing operations of claim 5, wherein: the rotary sealing element comprises a first sealing ring, a second sealing ring and a third sealing ring, wherein the first sealing ring is arranged between the inner wall of the movable joint interface and the outer wall of the bearing fixing ring, the second sealing ring is arranged between the tightening cap and the movable joint body, and the third sealing ring is arranged between the inner wall of the bearing fixing ring and the outer wall of the movable joint body.
7. The high pressure fracturing swivel for acid fracturing operations of claim 1, wherein: the sealing assembly comprises an axial sealing element arranged between the outer wall of the movable joint main body and the inner wall of the movable joint interface and a radial sealing element arranged between the front end face of the movable joint main body and a shoulder inside the movable joint interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310219954.0A CN115899406A (en) | 2023-03-09 | 2023-03-09 | High-pressure fracturing rotary joint for acidizing fracturing operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310219954.0A CN115899406A (en) | 2023-03-09 | 2023-03-09 | High-pressure fracturing rotary joint for acidizing fracturing operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115899406A true CN115899406A (en) | 2023-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310219954.0A Pending CN115899406A (en) | 2023-03-09 | 2023-03-09 | High-pressure fracturing rotary joint for acidizing fracturing operation |
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| CN (1) | CN115899406A (en) |
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2023
- 2023-03-09 CN CN202310219954.0A patent/CN115899406A/en active Pending
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Application publication date: 20230404 |
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