CN210660015U - Metal sealing structure of high-pressure hanger - Google Patents
Metal sealing structure of high-pressure hanger Download PDFInfo
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- CN210660015U CN210660015U CN201921775893.1U CN201921775893U CN210660015U CN 210660015 U CN210660015 U CN 210660015U CN 201921775893 U CN201921775893 U CN 201921775893U CN 210660015 U CN210660015 U CN 210660015U
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- mandrel
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- sealing ring
- metal sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 101
- 239000002184 metal Substances 0.000 title claims abstract description 91
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- 238000005260 corrosion Methods 0.000 claims abstract description 8
- 230000007797 corrosion Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000012188 paraffin wax Substances 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 6
- 230000005489 elastic deformation Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 239000001993 wax Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010057071 Rectal tenesmus Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229910001119 inconels 625 Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 208000012271 tenesmus Diseases 0.000 description 1
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Abstract
The utility model discloses a metal seal structure of high pressure hanger, include: the mandrel is arranged in a hollow cavity of the hanger body, the metal sealing ring is arranged at the lower end of the hollow cavity, and the conical surface at the bottom end of the mandrel and the conical surface at the upper end of the metal sealing ring are in sealing fit after being extruded by the mandrel; the conical surface at the lower end of the metal sealing ring and the conical surface on the inner wall of the hollow cavity are in sealing fit after being extruded by the mandrel; the conical surface of the upper end of the metal sealing ring is extruded by the mandrel and then contracts towards the inner elastic deformation, the inner orifice of the metal sealing ring is tightly pressed on the outer wall of the heating pipe cable to be in sealing fit, the metal sealing ring and the metal sealing ring are arranged in the hanger body, the mandrel is used for realizing the tight fit and sealing of the mandrel and the metal sealing ring with each conical surface of the hanger body under the extrusion force of the mandrel, and the reliable sealing between the metal sealing ring and the metal outer pipe of the pipe cable is realized, the long-term reliable sealing between the heating pipe cable and the hanger under the high-pressure, high-corrosion and high-temperature environments is realized, and the paraffin removal operation mode of heating.
Description
Technical Field
The utility model relates to an oil drilling equipment field especially relates to a metal seal structure of high pressure hanger.
Background
At present, the problem of wax deposition of oil and gas wells exists in various large oil fields, wax removal and blockage removal become a conventional well workover operation mode, low-pressure and medium-pressure wells can adopt steel wire wax removal operation, but high-pressure and high-CO content wells2And H2The S well has the disadvantages of high difficulty, high risk, low efficiency and high operation cost in paraffin removal operation, and mechanical paraffin removal tools with different specifications and sizes need to be put into the well which is repeatedly operated, repeatedly assembled and disassembled and has serious paraffin accumulation, so that the labor intensity is high. Therefore, the method for heating the wax deposition point of the oil and gas well by suspending the heating pipe cable through the wellhead once and for all solves the problem of paraffin removal, and is a brand new solution which is safe, efficient, low in risk, low in cost, low in difficulty, low in labor intensity, capable of being installed once after multiple operations and capable of repeatedly heating paraffin removal for a long time. However, in the face of solving the long-term sealing problem between the pipe cable and the hanger under high-pressure, high-corrosion and high-temperature environments, the conventional continuous pipe hanger has a technical bottleneck at present, the well pressure is sealed by a rubber piece in the conventional continuous pipe hanger, and the long-term sealing under the high-pressure, high-corrosion and high-temperature environments has great potential safety hazards and risks, low reliability, easy aging and corrosion of a sealing piece and difficult replacement.
SUMMERY OF THE UTILITY MODEL
To above-mentioned problem and defect or not enough, the utility model aims to provide a metal seal structure of high pressure hanger realizes the long-term reliable sealing between umbilical and the hanger.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a metal seal structure for a high pressure hanger, comprising: the mandrel is arranged in a hollow cavity of the hanger body, the metal sealing ring is arranged at the lower end of the hollow cavity, and the conical surface at the bottom end of the mandrel and the conical surface at the upper end of the metal sealing ring are in sealing fit after being extruded by the mandrel; the conical surface at the lower end of the metal sealing ring and the conical surface on the inner wall of the hollow cavity are in sealing fit after being extruded by the mandrel, the conical surface at the upper end of the metal sealing ring is extruded by the mandrel and then elastically deforms and contracts inwards, and the inner orifice of the metal sealing ring compresses the outer wall of the heating cable penetrating through the inner hole of the metal sealing ring in sealing fit.
And a sealing retainer ring is arranged on the outer wall of the bottom of the mandrel.
The outer wall of the bottom of the mandrel is further provided with a first O-shaped ring. The sealing retainer ring and the first O-shaped ring are used for sealing the mandrel and the hanger body and are used as standby sealing measures of the metal sealing structure.
And a second O-shaped ring is arranged on the inner wall of the bottom of the mandrel. The second O-ring is used for sealing the mandrel and the metal shell of the heating pipe cable penetrating through the inner hole of the mandrel, and is used as a standby sealing measure of the metal sealing structure.
The inner wall of the bottom of the mandrel is of a first conical surface structure, the outer wall of the top of the metal sealing ring is of a second conical surface structure, and the first conical surface structure and the second conical surface structure are clamped in a sealing mode after being subjected to mandrel extrusion force.
The inner wall of hanger body bottom is first back taper structure, metal seal ring bottom outer wall is the second structure of falling the conical surface, first back taper structure and second fall the conical surface structure and receive sealed block mutually behind the dabber extrusion force.
The metal sealing ring is made of corrosion-resistant and high-temperature-resistant metal.
The mandrel and the metal sealing ring are of hollow structures, and the metal outer pipe of the heating pipe cable penetrates through the inner hole of the metal outer pipe.
The metal sealing ring is characterized in that the upper end outer conical surface and the lower end outer conical surface of the metal sealing ring are sealed in a stressed mode, the upper end outer conical surface is deformed in a stressed mode, shrinks and seals a heating pipe cable metal outer pipe penetrating through an inner hole, and extrusion force borne by the metal sealing ring is transmitted through a mandrel from screwing force of a screw rod and self weight of a pipe cable hung on a well head by a slip hanging mechanism.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a metal seal structure of high pressure hanger, through installing metal seal ring bottom the hanger body, at this internal dabber that sets up of hanger, dabber and metal seal ring have been realized under the dabber extrusion force, metal seal ring closely cooperates and seals with each conical surface of hanger body, and the reliable sealing between metal seal ring and the pipe cable metal outer tube, realized at high pressure, long-term reliable sealing between high corrosion and the high temperature environment heating tube cable and the hanger and hang the heating tube cable in the well head safely for a long time, the paraffin removal operation mode of utilizing the heating tube cable to give the inside heating of oil pipe has been realized.
Drawings
Fig. 1 is a schematic view of a metal sealing structure of the high-pressure hanger of the invention;
fig. 2 is the sealing schematic diagram of the metal sealing structure of the high-pressure hanger of the present invention.
In the drawings, 1 — mandrel; 2-a second O-ring; 3, sealing a check ring; 4-a first O-ring; 5-a metal sealing ring; 6-heating the pipe cable; 7-hanger body; 8-top thread; 9-hanging slip assemblies; 10-a pressure detection device; 11-pressure relief assembly.
Detailed Description
The present invention will be described in detail with reference to the drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a metal seal structure of high pressure hanger, include: the hanger comprises a mandrel 1 and a metal sealing ring 5, wherein the mandrel 1 is arranged in a hollow cavity of a hanger body 7, the metal sealing ring 5 is arranged at the lower end of the hollow cavity, and the conical surface at the bottom end of the mandrel 1 and the conical surface at the upper end of the metal sealing ring 5 are in sealing fit after being extruded by the mandrel 1; the conical surface at the lower end of the metal sealing ring 5 is in sealing fit with the conical surface on the inner wall of the hollow cavity after being extruded by the mandrel 1; the conical surface of the upper end of the metal sealing ring 5 is extruded by the mandrel 1 and then elastically deforms and contracts inwards, the inner hole opening of the metal sealing ring compresses the metal outer pipe of the heating pipe cable 6 penetrating through the inner hole of the metal sealing ring 5 to be matched in a sealing mode, and long-term reliable sealing of the heating pipe cable under high pressure is achieved. Specifically, the cavity has been seted up in the hanger body 7, install in the cavity and be used for hanging and sealed heating tube cable 6 dabber 1, hang slips subassembly 9 and metal seal ring 5, the slips subassembly 9 that hangs that is used for hanging heating tube cable 6 is installed to the upper end of dabber 1, 7 mid-mounting of hanger body have jackscrew 8, jackscrew 8 is installed in the horizontal hole of hanger, and its front end conical surface compresses tightly on the 1 middle part circular bead conical surface of dabber, converts the horizontal screwing force of jackscrew 8 into the downward extrusion force of dabber 1. Wherein, hang slips subassembly 9 through the combined action of push-up slips and hanging slips and prevent that heating tube cable 6 from scurrying the tenesmus, will hang reliable the hanging in well head of tube cable 6.
Preferably, the lower end of the hanger body 7 is provided with a pressure detection device 10 for detecting the tightness between the hanger body 7 and the metal sealing ring 5, the upper end of the hanger body 7 is provided with a pressure relief assembly 11 for discharging pressure, and the pressure detection device 10 and the pressure relief assembly 11 are both communicated with the hollow cavity.
Preferably, the outer wall of the bottom of the mandrel 1 is provided with a sealing retainer ring 3 and a first O-shaped ring 4, which are used for sealing between the mandrel 1 and the inner wall of the hanger body 7 as a standby sealing measure of the metal sealing structure. And a second O-shaped ring 2 is arranged on the inner wall of the bottom of the mandrel 1 and used for sealing between the mandrel 1 and the heating pipe cable 6 and used as a standby sealing measure of the metal sealing structure.
As shown in fig. 2, the inner wall of the bottom of the mandrel 1 is a first conical surface structure, the outer wall of the top of the metal sealing ring 5 is a second conical surface structure, and the first conical surface structure and the second conical surface structure are in sealing engagement after being subjected to extrusion force of the mandrel 1. 7 bottom inner walls of hanger body are first back taper surface structures, 5 bottom outer walls of metal seal ring are second back taper surface structures, first back taper surface structure and second back taper surface structure receive sealed block mutually behind the 1 extrusion force of dabber. It should be noted that, in the present invention, the metal sealing ring 5 is designed as a corrosion-resistant and high-temperature-resistant material, for example: 316. 316L, 304, or inconel625, which is installed inside the hanger body 7, after the heating pipe cable is reliably hung at the wellhead by the hanging slip assembly 9, the mandrel 1 is pushed to move downwards to press the metal sealing ring 5 and the conical surfaces of the hanger body 7 to be tightly matched with each other by screwing the jackscrew assembly 8, so that the inner conical surface at the lower end of the mandrel 1 and the outer conical surface at the upper end of the metal sealing ring 5 (point a in the figure), the outer conical surface at the upper end of the metal sealing ring 5 is pressed, deformed and shrunk to press and contact the inner orifice of the conical surface with the metal outer pipe of the heating pipe cable 6 (point b in the figure), and the inner conical surface at the lower end of the hanger body 7 and the outer conical surface at the lower end of the metal sealing ring 5 (point c in the figure) are sealed, and 3 seals the pressure gas or liquid effectively and. The sealing retainer ring 3 and the first O-shaped ring 4 are standby seals at a point c; the second O-ring 2 is a spare seal for points a and b. The pressure sensing assembly 10 can detect this when the c-point seal fails; when points a, b and c and the spare seal thereof are all failed, the metal sealing part is sealed again by increasing the screwing force of the jackscrew, and the pressure relief assembly 11 can detect and release the pressure. The pressure detection assembly 10 and the pressure relief assembly 11 can be used as pressure test ports for detecting the sealing effect of the metal sealing part and the standby sealing part.
The utility model discloses theory of operation and process do:
It should be apparent to those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and therefore, the modifications and changes that can be made by those skilled in the art to some parts of the present invention still embody the principles of the present invention, and the objects of the present invention are achieved, all falling within the scope of the present invention.
Claims (8)
1. A metal seal structure for a high pressure hanger, comprising: the device comprises a mandrel (1) and a metal sealing ring (5), wherein the mandrel (1) is arranged in a hollow cavity of a hanger body (7), the metal sealing ring (5) is arranged at the lower end of the hollow cavity, and the conical surface at the bottom end of the mandrel (1) and the conical surface at the upper end of the metal sealing ring (5) are in sealing fit after being extruded by the mandrel (1); the conical surface at the lower end of the metal sealing ring (5) is in sealing fit with the conical surface on the inner wall of the hollow cavity after being extruded by the mandrel (1); the conical surface of the upper end of the metal sealing ring (5) is extruded by the mandrel (1) and then elastically deforms and contracts inwards, and the inner hole of the conical surface is tightly pressed on the outer wall of the heating pipe cable (6) penetrating through the inner hole of the metal sealing ring (5) to be matched with the outer wall in a sealing manner.
2. The metal seal structure of the high-pressure hanger of claim 1, characterized in that the bottom outer wall of the mandrel (1) is provided with a sealing collar (3).
3. The metal sealing structure of the high-pressure hanger according to claim 1 or 2, characterized in that the outer wall of the bottom of the mandrel (1) is further provided with a first O-ring (4).
4. The metal sealing structure of the high-pressure hanger according to claim 1 or 2, characterized in that the bottom inner wall of the mandrel (1) is provided with a second O-ring (2).
5. The metal sealing structure of the high-pressure hanger as claimed in claim 1, wherein the inner wall of the bottom of the mandrel (1) is a first conical surface structure, the outer wall of the top of the metal sealing ring (5) is a second conical surface structure, and the first conical surface structure and the second conical surface structure are in sealing engagement after being subjected to mandrel extrusion force.
6. The metal sealing structure of the high-pressure hanger according to claim 1 or 5, characterized in that the inner wall of the bottom of the hanger body (7) is of a first inverted conical surface structure, the outer wall of the bottom of the sealing ring (5) is of a second inverted conical surface structure, and the first inverted conical surface structure and the second inverted conical surface structure are in sealing engagement after being subjected to mandrel extrusion force.
7. The metal seal structure of a high-pressure hanger according to claim 1, characterized in that said metal seal ring (5) is a seal ring made of corrosion-resistant and high-temperature-resistant metal.
8. The metal seal structure of a high-pressure hanger according to claim 1, characterized in that the mandrel (1) and the metal seal ring (5) are hollow structures, and the metal outer tube of the heating umbilical passes through the inner hole of the hollow structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921775893.1U CN210660015U (en) | 2019-10-22 | 2019-10-22 | Metal sealing structure of high-pressure hanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921775893.1U CN210660015U (en) | 2019-10-22 | 2019-10-22 | Metal sealing structure of high-pressure hanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210660015U true CN210660015U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921775893.1U Active CN210660015U (en) | 2019-10-22 | 2019-10-22 | Metal sealing structure of high-pressure hanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210660015U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417592A (en) * | 2021-01-18 | 2021-09-21 | 苏州道森钻采设备股份有限公司 | Novel throw and drag for electric submersible pump well head christmas tree device |
| CN114112235A (en) * | 2020-08-31 | 2022-03-01 | 中国石油天然气股份有限公司 | Mandrel type casing hanger testing device |
-
2019
- 2019-10-22 CN CN201921775893.1U patent/CN210660015U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112235A (en) * | 2020-08-31 | 2022-03-01 | 中国石油天然气股份有限公司 | Mandrel type casing hanger testing device |
| CN113417592A (en) * | 2021-01-18 | 2021-09-21 | 苏州道森钻采设备股份有限公司 | Novel throw and drag for electric submersible pump well head christmas tree device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 721306 Gaoxin 19 Road, Baoji high tech Development Zone, Shaanxi Province Patentee after: Baoji Saifu Petroleum Machinery Co.,Ltd. Country or region after: China Address before: 721306 Gaoxin 19 Road, Baoji high tech Development Zone, Shaanxi Province Patentee before: BAOJI SAFE PETROLEUM MACHINERY Co.,Ltd. Country or region before: China |