CN218759800U - Universal mandrel type hanger sealing device - Google Patents
Universal mandrel type hanger sealing device Download PDFInfo
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- CN218759800U CN218759800U CN202222586770.1U CN202222586770U CN218759800U CN 218759800 U CN218759800 U CN 218759800U CN 202222586770 U CN202222586770 U CN 202222586770U CN 218759800 U CN218759800 U CN 218759800U
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Abstract
The utility model relates to a sealing device of a universal mandrel type hanger, which comprises a sealing structure and a double male short joint of a production oil pipe; the sealing structure is arranged at a first connecting part of the mandrel hanger, and a first end of the double male short section of the production oil pipe is connected with a second connecting part of the mandrel hanger through long round buckle threads; the mandrel type hanger is sleeved in the casing head, and a first connecting part of the mandrel type hanger is movably connected with the inner wall of the casing head in a small gap mode. The utility model provides a problem that the airtight specification of detaining of sleeve pipe, oil pipe gas production pipe screw thread differs, use double seal, one is sealed through the FS sealing washer that a set of or multiunit interval set up, and it is second to use metal seal to realize sealing.
Description
Technical Field
The utility model belongs to the technical field of the casing head, concretely relates to general mandrel type hanger sealing device.
Background
In order to prevent natural gas leakage, thread sealing is needed between a production sleeve and a gas production pipe in a gas production well mouth device, the thread sealing is established on the basis of adopting a buttress thread, an external thread is additionally provided with an external step and end face sealing at a pipe end, a pipe hoop internal thread is additionally provided with a sealing inner hole step and end face sealing which are consistent with the end of an external thread pipe at the tail end of a thread which is spirally matched with the external thread, the sealing of a connecting thread can be indirectly ensured after the pipe hoop is screwed according to specified torque, and actually, the sealing is realized between the pipe mouth end face and the pipe hoop inner hole end face.
Therefore, suppliers for producing the casing and the gas production pipe improve the lead-in or lead-out included angle of the thread, the step and the end face of the excircle of the pipe end, the step and the end face of the inner hole of the pipe hoop and the end face seal on the basis of the thread of the buttress buckle, and protect the sealing device through patent application, and only in the market of Chinese oil pipes and casings, the number of the thread airtight buckle or the patent product called as a special buckle is more than 20, conservative estimation is carried out, and each manufacturer supplies the casing and the gas production pipe with respective specifications to the petroleum market.
In view of the above market supply state, downstream manufacturers who purchase and use gas production wellhead devices (such as casing heads, tubing heads, and gas production trees) often need to select different screw thread shapes of different structures of different products of multiple manufacturers in order to ensure that the lower ends of casing hangers or tubing/gas production tubing hangers in the casing heads or tubing heads are matched with the screw threads of casings or tubing/gas production tubes of multiple specifications, which not only causes confusion in management and maintenance, but also increases the use cost, and causes great inconvenience for downstream users. The sealing extending to the whole oil pipe hanger has more or less inconveniences, so that the sealing is not reliable enough, and the operation and the use are not convenient enough.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems existing in the prior art, the utility model provides a general mandrel type hanger sealing device. The to-be-solved technical problem of the utility model is realized through following technical scheme:
the utility model provides a universal mandrel type hanger sealing device, which comprises a sealing structure and a double male nipple of a production oil pipe;
the sealing structure is arranged at a first connecting part of the mandrel type hanger, and a first end of the double male short section of the production oil pipe is connected with a second connecting part of the mandrel type hanger through long round buckle threads.
The mandrel type hanger is sleeved in the casing head, and a first connecting part of the mandrel type hanger is movably connected with the inner wall of the casing head in a small gap mode.
The sealing structure comprises a jackscrew assembly, a sealing pressing ring and a metal sealing ring; the first end of the sealing pressing ring is provided with a first inclined plane, the second end of the sealing pressing ring is a horizontal end face, and the jackscrew assembly penetrates through the casing head.
And a conical head at the end part of the jackscrew assembly is in contact with the first inclined plane and compresses the sealing pressing ring through the first inclined plane.
The first connecting portion of dabber formula hanger is provided with the installation step, the metal seal setting is in horizontal terminal surface with between the installation step.
In an embodiment of the present invention, the metal sealing ring includes a metal sealing outer ring and a metal sealing inner ring; the metal sealing outer ring and the metal sealing inner ring are arranged between the sealing pressing ring and the installation step, the horizontal end face of the second end of the sealing pressing ring presses the upper end face of the metal sealing outer ring, and the lower end face of the metal sealing inner ring is matched with the installation step.
One side of the metal sealing outer ring is provided with a second inclined plane, one side of the metal sealing inner ring is provided with a third inclined plane, and the second inclined plane and the third inclined plane are parallel and in sealing contact.
The other side of the metal sealing outer ring is a cylindrical surface and is in sealing contact with the inner hole wall of the casing head; the other side of the metal sealing inner ring is a cylindrical surface and is in sealing contact with the outer cylindrical surface of the mandrel type hanger.
In an embodiment of the present invention, the sealing structure further includes a plurality of FS sealing rings; a plurality of annular grooves are arranged below the step of the first connecting part of the mandrel type hanger at intervals, and a plurality of FS seal rings are respectively arranged in the plurality of annular grooves.
In an embodiment of the utility model, the first end of the two public nipple joints of production oil pipe with the threaded surface of the second connecting portion of dabber formula hanger passes through sealed sealing connection of glue of anaerobism.
The utility model discloses an embodiment, the second end of production oil pipe double-core nipple is detained through airtight and is connected with oil pipe coupling sealing.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses a shaft type hanger sealing device of general dabber, for solving the sleeve pipe, the airtight problem of detaining the specification and differing of oil pipe gas production pipe screw thread, the method of synthesizing the compromise has been proposed, let the airtight firm of detaining that has patent property of production provide a root length about 70 centimetres, the sleeve pipe of material and steel grade and firm supply, oil pipe gas production pipe identical connecting pipe, the airtight of having patent property of connecting pipe one end processing oneself is detained, the special long round of oil that its other end processing is international general detains the pipe thread, long round detains the screw thread mechanical properties and satisfies oil borehole operation requirement and no patent protection completely, but long round detains the pipe thread and has sealed defect in the strictness, adopt and detain a special anaerobism sealed glue in pipe thread surface interpolation, sealed automatic solidification of isolated oxygen can reach thread seal when the screw thread is turned round after tight, satisfy the operation requirement. Meanwhile, aiming at the sealing of the oil pipe hanger and the oil pipe head, double sealing is used, wherein one sealing is realized by one group or multiple groups of FS sealing rings arranged at intervals, and the other sealing is realized by a metal sealing ring, and a jackscrew is screwed into the casing head, presses the sealing pressing ring through an inclined plane on the sealing pressing ring, and transmits and presses a metal sealing outer ring and a metal sealing inner ring to realize sealing.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic overall structure diagram of a universal mandrel type hanger sealing device provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a universal spindle hanger according to an embodiment of the present invention;
fig. 3 is a schematic view of a sealing structure of a universal spindle hanger according to an embodiment of the present invention;
fig. 4 is the embodiment of the utility model provides a production oil pipe double-male short section structure schematic diagram.
An icon: 1-top thread; 2, sealing a pressing ring; 3-a metal seal ring; 3-1-metal sealing outer ring; 3-2-metal sealing the inner ring; 4-producing double male short joints of the oil pipe; 5-FS seal ring.
Detailed Description
In order to further explain the technical means and effects of the present invention adopted to achieve the objectives of the present invention, the following description will be made in conjunction with the accompanying drawings and the detailed description of the embodiments to explain in detail a universal spindle type hanger sealing device according to the present invention.
The foregoing and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments of the present invention when taken in conjunction with the accompanying drawings. The technical means and effects of the present invention to achieve the predetermined objects can be more deeply and specifically understood through the description of the specific embodiments, however, the attached drawings are only for reference and description and are not intended to limit the technical solution of the present invention.
Example one
Referring to fig. 1, fig. 2 and fig. 4 in combination, fig. 1 is a schematic diagram of an overall structure of a universal mandrel type hanger sealing device according to an embodiment of the present invention; FIG. 2 is a schematic structural view of a universal spindle hanger according to an embodiment of the present invention; please refer to fig. 4, fig. 4 is a schematic structural diagram of a double male short section of a production tubing provided by an embodiment of the present invention.
As shown in the figure, the universal mandrel type hanger sealing device of the embodiment comprises a sealing structure and a production oil pipe double male nipple 4; the sealing structure is arranged at the first connecting part of the mandrel type hanger, and the first end of the double male short section 4 of the production oil pipe is connected with the second connecting part of the mandrel type hanger through long round buckle threads.
In this embodiment, the mandrel hanger is sleeved in the casing head, and the first connecting portion of the mandrel hanger is movably connected with the inner wall of the casing head in a small gap.
In this embodiment, the first end of the double male nipple 4 of the production tubing is hermetically connected with the threaded surface of the second connecting part of the mandrel hanger through anaerobic sealant.
In an alternative embodiment, a le tai sealant is coated on the thread contact position of the first end of the double male short section 4 of the production pipe and the second connecting part of the mandrel hanger, so that the thread is screwed in place, and the sealing is safe and reliable.
In this embodiment, the sealing device for the universal mandrel type hanger further comprises a tubing coupling, a first end of the tubing coupling is connected with a second end of the double male nipple 4 of the production tubing, and a second end of the tubing coupling is connected with the production tubing.
In this embodiment, the second end of the production tubing duplex section 4 is sealingly connected to the tubing collar by an airtight buckle.
Illustratively, the airtight button includes: for example, chinese patents CN101975034B and CN101975035B are designed by various manufacturers and schools and applied to actually produced patent airtight fasteners.
In an optional embodiment, when a production oil pipe, an air pipe and a casing are delivered by a manufacturer, the production oil pipe double male short section 4 is provided, a first end of the production oil pipe double male short section 4 is a universal long and round buckle thread with non-patent properties, a second end of the production oil pipe double male short section 4 is an airtight buckle with patent properties of corresponding models of the manufacturer, and the generalization and standardization of the oil pipe, the air pipe and the casing are achieved through phase change.
Please refer to fig. 3, fig. 3 is an enlarged schematic view of the sealing structure according to the embodiment of the present invention.
As shown in the figure, the sealing structure of the present embodiment includes a jackscrew assembly 1, a sealing pressing ring 2 and a metal sealing ring 3; the first end of the sealing pressing ring 2 is provided with a first inclined plane, the second end of the sealing pressing ring is a horizontal end face, and the jackscrew assembly 1 penetrates through the casing head.
In the present embodiment, the conical head at the end of the jackscrew assembly 1 contacts the first inclined surface and presses the sealing pressing ring 2 through the first inclined surface.
In this embodiment, the first connecting portion of the spindle hanger is provided with a mounting step, and the metal seal ring 3 is disposed between the horizontal end surface and the mounting step.
In the embodiment, the metal sealing ring 3 comprises a metal sealing outer ring 3-1 and a metal sealing inner ring 3-2; the metal sealing outer ring 3-1 and the metal sealing inner ring 3-2 are arranged between the sealing pressing ring 2 and the installation step, the horizontal end face of the second end of the sealing pressing ring 2 presses the upper end face of the metal sealing outer ring 3-1, and the lower end face of the metal sealing inner ring 3-2 is matched with the installation step.
In this embodiment, a second inclined surface is arranged on one side of the metal sealing outer ring 3-1, a third inclined surface is arranged on one side of the metal sealing inner ring 3-2, and the second inclined surface and the third inclined surface are parallel and in sealing contact.
In this embodiment, the other side of the metal sealing outer ring 3-1 is a cylindrical surface, and is in sealing contact with the inner hole wall of the casing head.
In the embodiment, the other side of the metal sealing inner ring 3-2 is a cylindrical surface and is in sealing contact with the outer cylindrical surface of the mandrel hanger.
In an optional embodiment, the lower end of the sealing pressing ring 2 presses the upper end of the metal sealing outer ring 3-1, the metal sealing outer ring 3-1 drives the metal sealing inner ring 3-2 to move downwards relatively through slope transmission, after the metal sealing outer ring is limited by a step, the outer diameter of the metal sealing outer ring 3-1 is increased, the inner diameter of the metal sealing inner ring 3-2 is reduced, under the continuous action of a conical head of a jackscrew end part cone of the jackscrew assembly 1, the outer diameter of the metal sealing outer ring 3-1 is continuously increased, and the inner diameter of the metal sealing inner ring 3-2 tends to be continuously reduced, so that reliable sealing of the mandrel type hanger is realized.
It should be noted that the metal sealing ring 3 has other outstanding advantages, the elastic soft metal material of the metal sealing outer ring 3-1 and the metal sealing ring 3-2 can continuously work in an environment above 200 ℃ and keep good stability, and in addition, the elastic soft metal material has better resistance to corrosion environment and the like and anti-scouring capability, and is more suitable for the use environment of underground equipment.
In this embodiment, the sealing structure further includes a plurality of FS sealing rings 5, a plurality of annular grooves are spaced below the step of the first connecting portion of the mandrel hanger, and the plurality of FS sealing rings 5 are respectively disposed in the plurality of annular grooves.
In an alternative embodiment, there are at least two FS sealing rings 5.
In the specific operation process, the jackscrew 1 is screwed into the casing head, the end face of the jackscrew 1 is a conical surface and is matched with a first inclined plane of the sealing pressing ring 2 through the conical surface, the sealing pressing ring 2 moves downwards along a cylindrical surface, the sealing pressing ring 2 transmits pressure and presses the metal sealing outer ring 3-1 tightly, and the metal sealing outer ring 3-1 deforms to realize sealing with the inner hole of the casing head; the metal sealing inner ring 3-2 deforms to realize sealing with the outer cylindrical surface of the suspension body.
The utility model discloses shaft type hanger sealing device of general dabber, for solving the sleeve pipe, the airtight problem of detaining the specification and differing of oil pipe gas production pipe screw thread, the method of synthesizing the compromise is proposed, let production have airtight knot firm of patent nature provide one about 70 centimetres of length, the sleeve pipe of material and steel grade and firm supply, oil pipe gas production pipe identical connecting pipe, connecting pipe one end processing oneself has the airtight knot of patent nature, the special long round of oil pipe thread of detaining of its other end processing international general, long round of detaining screw thread mechanical properties satisfies oil borehole operation requirement and no patent protection completely, but long round detains the pipe thread and has sealed defect in the stricter, adopt to add a special anaerobism sealed glue on long round detains pipe thread surface, isolated oxygen sealed glue automatic curing can reach thread seal when the screw thread is turned round after, satisfy the operation requirement. Meanwhile, aiming at the sealing of the oil pipe hanger and the oil pipe head, double sealing is used, wherein one sealing is realized by one group or multiple groups of FS sealing rings arranged at intervals, and the other sealing is realized by a metal sealing ring, and a jacking screw is screwed into the casing head, passes through an inclined plane on the sealing pressing ring and presses the sealing pressing ring, and transmits and presses a metal sealing outer ring and a metal sealing inner ring to realize sealing.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed. Without further limitation, an element defined by the phrases "comprising one of \8230;" does not exclude the presence of additional like elements in an article or device comprising the element. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The directional or positional relationships indicated by "upper", "lower", "left", "right", etc. are based on the directional or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (5)
1. A universal mandrel type hanger sealing device is characterized by comprising a sealing structure and a double male short section (4) of a production oil pipe;
the sealing structure is arranged at a first connecting part of the mandrel type hanger, and a first end of the double male short section (4) of the production oil pipe is connected with a second connecting part of the mandrel type hanger through long round buckle threads;
the mandrel type hanger is sleeved in the casing head, and a first connecting part of the mandrel type hanger is movably connected with the inner wall of the casing head in a small gap manner;
the sealing structure comprises a jackscrew assembly (1), a sealing pressing ring (2) and a metal sealing ring (3);
the first end of the sealing pressing ring (2) is provided with a first inclined plane, the second end of the sealing pressing ring is a horizontal end face, and the jackscrew assembly (1) penetrates through the casing head;
a conical head at the end part of the jackscrew assembly (1) is in contact with the first inclined plane and presses the sealing pressing ring (2) through the first inclined plane;
the mandrel hanger is characterized in that a first connecting part of the mandrel hanger is provided with an installation step, and the metal sealing ring (3) is arranged between the horizontal end face and the installation step.
2. The universal spindle hanger seal according to claim 1,
the metal sealing ring (3) comprises a metal sealing outer ring (3-1) and a metal sealing inner ring (3-2);
the metal sealing outer ring (3-1) and the metal sealing inner ring (3-2) are arranged between the sealing pressing ring (2) and the installation step, the horizontal end face of the second end of the sealing pressing ring (2) presses the upper end face of the metal sealing outer ring (3-1), and the lower end face of the metal sealing inner ring (3-2) is matched with the installation step;
a second inclined plane is arranged on one side of the metal sealing outer ring (3-1), a third inclined plane is arranged on one side of the metal sealing inner ring (3-2), and the second inclined plane and the third inclined plane are parallel and in sealing contact;
the other side of the metal sealing outer ring (3-1) is a cylindrical surface and is in sealing contact with the inner hole wall of the casing head;
the other side of the metal sealing inner ring (3-2) is a cylindrical surface and is in sealing contact with the outer cylindrical surface of the mandrel type hanger.
3. The universal spindle hanger seal arrangement according to claim 1, wherein said seal arrangement further comprises, a plurality of FS seal rings (5);
a plurality of annular grooves are arranged below the step of the first connecting part of the mandrel type hanger at intervals, and a plurality of FS sealing rings (5) are arranged in the annular grooves respectively.
4. The universal spindle hanger seal according to claim 1,
the first end of the double male short section (4) of the production oil pipe is in sealing connection with the threaded surface of the second connecting part of the mandrel hanger through anaerobic sealant.
5. The universal mandrel hanger seal according to claim 1 wherein the second end of the production tubing double male sub (4) is sealingly connected to the tubing collar by a gas tight buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222586770.1U CN218759800U (en) | 2022-09-28 | 2022-09-28 | Universal mandrel type hanger sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222586770.1U CN218759800U (en) | 2022-09-28 | 2022-09-28 | Universal mandrel type hanger sealing device |
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| Publication Number | Publication Date |
|---|---|
| CN218759800U true CN218759800U (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222586770.1U Active CN218759800U (en) | 2022-09-28 | 2022-09-28 | Universal mandrel type hanger sealing device |
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| CN (1) | CN218759800U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117823079A (en) * | 2024-02-19 | 2024-04-05 | 建湖县鸿达阀门管件有限公司 | A superhigh pressure casing head for oil field well head prevents leaking |
-
2022
- 2022-09-28 CN CN202222586770.1U patent/CN218759800U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117823079A (en) * | 2024-02-19 | 2024-04-05 | 建湖县鸿达阀门管件有限公司 | A superhigh pressure casing head for oil field well head prevents leaking |
| CN117823079B (en) * | 2024-02-19 | 2024-06-21 | 建湖县鸿达阀门管件有限公司 | A superhigh pressure casing head for oil field well head prevents leaking |
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