CN111005697B - Heating cable high-voltage sealing device - Google Patents
Heating cable high-voltage sealing device Download PDFInfo
- Publication number
- CN111005697B CN111005697B CN201911191086.XA CN201911191086A CN111005697B CN 111005697 B CN111005697 B CN 111005697B CN 201911191086 A CN201911191086 A CN 201911191086A CN 111005697 B CN111005697 B CN 111005697B
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- Prior art keywords
- heating
- sealing
- connecting end
- armor layer
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 139
- 238000007789 sealing Methods 0.000 title claims abstract description 101
- 229910052751 metal Inorganic materials 0.000 claims abstract description 81
- 239000002184 metal Substances 0.000 claims abstract description 81
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000007747 plating Methods 0.000 claims description 16
- 239000004020 conductor Substances 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 8
- 239000003129 oil well Substances 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- 230000002500 effect on skin Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gasket Seals (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention relates to a high-pressure sealing device for a heating cable, which comprises a sealing flange, a sealing body and a heating cable, wherein the sealing flange, the sealing body and the heating cable are connected to a wellhead; a closed cavity is arranged in the sealing body; the sealing flange comprises a flange plate and a connecting end head integrally formed at the top of the flange plate, and a lower connecting end seat at the bottom of the sealing body is sealed in the connecting end head of the sealing flange; the heating cable is provided with the metal inner heating armor layer outside, the metal inner heating armor layer is arranged outside, the top of the metal outer heating armor layer is lower than the top of the metal inner heating armor layer, the heating cable penetrates through the sealing body and the sealing flange, the top of the metal outer heating armor layer is located in the sealing cavity, a sealing ring is arranged between the heating cable and the sealing body, a leakage detection port communicated with the sealing cavity is formed in the outer wall of the sealing body, and the leakage detection port is connected with an external detection device. The invention avoids the pressure leakage into the atmosphere and provides better guarantee for safe production.
Description
Technical Field
The invention relates to the technical field of electric heating operation of oil and gas wells, in particular to a high-pressure sealing device for a heating cable.
Background
The wax deposition of oil well is a long-standing problem in the development process of oil field, when crude oil is pumped from underground to ground, the temperature of crude oil is gradually reduced due to the escape and expansion of dissolved gas, the wax is crystallized and separated out from crude oil according to the molecular weight, and then deposited on the inner wall of oil pipe, so that the oil well is narrowed, the yield of oil well is reduced, and when serious, the oil pipe is blocked, and the oil well is stopped. The general paraffin removal mode has the advantages of mechanical scraping, complex process and high cost, and well repair operation can be performed.
At present, heating cables are mostly adopted for heat tracing, so that the phenomenon of wax precipitation is avoided, and the temperature in an oil well is prevented from being too low. However, oil gas in the oil gas well has strong corrosiveness, and leakage can occur after the outer layer of the heating cable is corroded, so that great potential safety hazards exist.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a high-pressure sealing device for a heating cable.
The invention adopts the following technical scheme to realize the aim:
a heating cable high-pressure sealing device comprises a sealing flange, a sealing body and a heating cable, wherein the sealing flange, the sealing body and the heating cable are connected to a wellhead;
the top of the sealing body is provided with an upper connecting end and the bottom of the sealing body is provided with a lower connecting end, a closed cavity is arranged in the sealing body, an upper through hole penetrates through the middle position of the upper connecting end, a lower through hole penetrates through the middle position of the lower connecting end, and the upper through hole and the lower through hole are communicated with the closed cavity;
The sealing flange comprises a flange plate and a connecting end head integrally formed at the top of the flange plate, and a lower connecting end seat at the bottom of the sealing body is sealed in the connecting end head of the sealing flange;
The heating cable is provided with an inner heating armor layer outside metal, the outer heating armor layer outside metal is arranged outside the inner heating armor layer, the top of the outer heating armor layer is lower than the top of the inner heating armor layer, the heating cable sequentially penetrates through an upper connecting end, a sealing body, a lower connecting end and a sealing flange from top to bottom, the top of the outer heating armor layer is located in a sealed cavity, the top of the inner heating armor layer is located above the upper connecting end, sealing rings are arranged between the inner heating armor layer of the heating cable and an upper through hole, between the outer heating armor layer of the metal of the heating cable and the lower through hole, a leakage detection port communicated with the sealed cavity is formed in the outer wall of the sealing body, and the leakage detection port is connected with an external detection device.
A plurality of sealing rings are arranged between the lower connecting end of the sealing body and the connecting end of the sealing flange.
The heating cable positioned in the metal outer heating armor layer and the metal inner heating armor layer comprises a conductor, a plating layer and an insulating layer which are sequentially arranged from inside to outside, the bottom of the heating cable is provided with a tail end connecting part, and the conductor is communicated with the metal outer heating armor layer and the metal inner heating armor layer through the tail end connecting part.
The plating layer is one of a tin plating layer, a silver plating layer or a nickel plating layer.
The metal inner heating armor layer and the metal outer heating armor layer are one of titanium steel or copper.
The beneficial effects of the invention are as follows: the sealing flange is sealed with high-pressure oil gas with corrosiveness, the heating cable is provided with the metal inner heating armor layer and the metal outer heating armor layer, when holes appear in the metal outer heating armor layer, pressure can leak into the airtight cavity in the sealing body from the middle of the metal inner heating armor layer and the metal outer heating armor layer, the sealing ring is arranged to ensure that the pressure cannot leak into the atmosphere, the airtight cavity is communicated with the leakage detection port, a leakage signal can be captured, a responsible person can close a bottom hole safety valve in time, potential safety hazards are relieved, and better guarantee is provided for safety production.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of a seal body;
FIG. 3 is a schematic structural view of a sealing flange;
FIG. 4 is a schematic view of a heating cable;
In the figure: 1-a sealing flange; 2-a sealing body; 3-heating cable; 4-upper connecting ends; 5-lower connecting end; 6-sealing the cavity; 7-upper through holes; 8-a lower through hole; 9-a flange plate; 10-connecting the end heads; 11-a metal inner heating armor layer; 12-a metal outer heating armor layer; 13-a sealing ring; 14-a leak detection port; 15-conductors; 16-plating; 17-an insulating layer; 18-tail end attachment portion;
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
Specific example 1:
as shown in fig. 1 to 3, a high-pressure sealing device for a heating cable comprises a sealing flange 1 connected to a wellhead, a sealing body 2 and a heating cable 3;
an upper connecting end 4 is arranged at the top of the sealing body 2, a lower connecting end 5 is arranged at the bottom of the sealing body 2, a closed cavity 6 is arranged in the sealing body 2, an upper through hole 7 penetrates through the middle position of the upper connecting end 4, a lower through hole 8 penetrates through the middle position of the lower connecting end 5, and the upper through hole 7 and the lower through hole 8 are both communicated with the closed cavity 6;
The sealing flange 1 comprises a flange 9 and a connecting end 10 integrally formed at the top of the flange 9, and the lower connecting end 5 at the bottom of the sealing body 2 is sealed in the connecting end 10 of the sealing flange 1 in a seat manner;
The heating cable 3 is provided with an inner metal heating armor layer 11, an outer metal heating armor layer 12 is arranged outside the inner metal heating armor layer 11, the top of the outer metal heating armor layer 12 is lower than the top of the inner metal heating armor layer 11, the heating cable 3 sequentially penetrates through the upper connecting end 4, the sealing body 2, the lower connecting end 5 and the sealing flange 1 from top to bottom, the top of the outer metal heating armor layer 12 is positioned in the sealed cavity 6, the top of the inner metal heating armor layer 11 is positioned above the upper connecting end 4, a sealing ring 13 is arranged between the inner metal heating armor layer 11 of the heating cable 3 and the upper through hole 7, and between the outer metal heating armor layer 12 of the heating cable 3 and the lower through hole 8, a leakage detection port 14 communicated with the sealed cavity 6 is arranged on the outer wall of the sealing body 2, and the leakage detection port 14 is connected with an external detection device.
A plurality of sealing rings are arranged between the lower connecting end 5 of the sealing body 2 and the connecting end 10 of the sealing flange 1.
The sealing flange 1 is sealed by high-pressure oil gas with corrosiveness, the heating cable 3 is provided with the metal inner heating armor layer 11 and the metal outer heating armor layer 12, when holes appear in the metal outer heating armor layer 12 by corrosion, pressure can leak into the airtight cavity 6 in the sealing body 2 from the middle of the metal inner heating armor layer 11 and the metal outer heating armor layer 12, the airtight cavity 6 is communicated with the leakage detection port 14 by the arrangement of the sealing ring 13, a leakage signal can be captured, a responsible person can close a bottom hole safety valve in time, potential safety hazards are relieved, and better guarantee is provided for safety production.
Specific example 2:
as shown in fig. 1 to 4, a high-pressure sealing device for a heating cable comprises a sealing flange 1 connected to a wellhead, a sealing body 2 and a heating cable 3;
an upper connecting end 4 is arranged at the top of the sealing body 2, a lower connecting end 5 is arranged at the bottom of the sealing body 2, a closed cavity 6 is arranged in the sealing body 2, an upper through hole 7 penetrates through the middle position of the upper connecting end 4, a lower through hole 8 penetrates through the middle position of the lower connecting end 5, and the upper through hole 7 and the lower through hole 8 are both communicated with the closed cavity 6;
The sealing flange 1 comprises a flange 9 and a connecting end 10 integrally formed at the top of the flange 9, and the lower connecting end 5 at the bottom of the sealing body 2 is sealed in the connecting end 10 of the sealing flange 1 in a seat manner;
The heating cable 3 is provided with an inner metal heating armor layer 11, an outer metal heating armor layer 12 is arranged outside the inner metal heating armor layer 11, the top of the outer metal heating armor layer 12 is lower than the top of the inner metal heating armor layer 11, the heating cable 3 sequentially penetrates through the upper connecting end 4, the sealing body 2, the lower connecting end 5 and the sealing flange 1 from top to bottom, the top of the outer metal heating armor layer 12 is positioned in the sealed cavity 6, the top of the inner metal heating armor layer 11 is positioned above the upper connecting end 4, a sealing ring 13 is arranged between the inner metal heating armor layer 11 of the heating cable 3 and the upper through hole 7, and between the outer metal heating armor layer 12 of the heating cable 3 and the lower through hole 8, a leakage detection port 14 communicated with the sealed cavity 6 is arranged on the outer wall of the sealing body 2, and the leakage detection port 14 is connected with an external detection device.
A plurality of sealing rings are arranged between the lower connecting end 5 of the sealing body 2 and the connecting end 10 of the sealing flange 1.
The heating cable 3 positioned in the metal outer heating armor layer 12 and the metal inner heating armor layer 11 comprises a conductor 15, a plating layer 16 and an insulating layer 17 which are sequentially arranged from inside to outside, the bottom of the heating cable 3 is provided with a tail end connecting part 18, and the conductor 15 is communicated with the metal outer heating armor layer 12 and the metal inner heating armor layer 11 through the tail end connecting part 18.
The plating layer 16 is one of a tin plating layer, a silver plating layer, or a nickel plating layer.
The metal inner heating armor layer 11 and the metal outer heating armor layer 12 are made of one of titanium steel or copper.
The top end of the heating cable 3 is connected with a power supply end, the bottom end is communicated with the metal inner heating armor layer 11 and the metal outer heating armor layer 12 through the tail end connecting part 18, current in the conductor 15 returns to the metal inner heating armor layer 11 and the metal outer heating armor layer 12 through the tail end connecting part 18, the metal inner heating armor layer 11 and the metal outer heating armor layer 12 utilize the principle of skin effect and proximity effect, the current flows on the inner side, and the outer side becomes physical insulation.
The specific principle is as follows: skin effect, in which current flows in the conductor 15, and skin passes on the surface of the conductor 15; proximity effect, the return currents in the metal inner heating armor layer 11 and the metal outer heating armor layer 12 attract the current on the surface of the conductor 15, so that the return currents are concentrated on the inner surfaces of the metal inner heating armor layer 11 and the metal outer heating armor layer 12, and physical insulation of the outer surfaces of the metal inner heating armor layer 11 and the metal outer heating armor layer 12 is formed.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is intended to cover various modifications, either made by the method concepts and technical solutions of the invention, or applied directly to other applications without modification, within the scope of the invention.
Claims (4)
1. The high-pressure sealing device for the heating cable is characterized by comprising a sealing flange (1), a sealing body (2) and a heating cable (3), wherein the sealing flange is connected to a wellhead;
An upper connecting end head (4) is arranged at the top of the sealing body (2) and a lower connecting end head (5) is arranged at the bottom of the sealing body, a closed cavity (6) is arranged in the sealing body (2), an upper through hole (7) is penetrated through the middle position of the upper connecting end head (4), a lower through hole (8) is penetrated through the middle position of the lower connecting end head (5), and the upper through hole (7) and the lower through hole (8) are communicated with the closed cavity (6);
The sealing flange (1) comprises a flange plate (9) and a connecting end (10) integrally formed at the top of the flange plate (9), and the lower connecting end (5) at the bottom of the sealing body (2) is sealed in the connecting end (10) of the sealing flange (1) in a seat mode;
The heating cable (3) is externally provided with a metal inner heating armor layer (11), the metal outer heating armor layer (12) is externally arranged outside the metal inner heating armor layer (11), the top of the metal outer heating armor layer (12) is lower than the top of the metal inner heating armor layer (11), the heating cable (3) sequentially penetrates through an upper connecting end (4), a sealing body (2), a lower connecting end (5) and a sealing flange (1) from top to bottom, the top of the metal outer heating armor layer (12) is positioned in a sealed cavity (6), the top of the metal inner heating armor layer (11) is positioned above the upper connecting end (4), sealing rings (13) are arranged between the metal inner heating armor layer (11) of the heating cable (3) and an upper through hole (7) and between the metal outer heating armor layer (12) of the heating cable (3) and the lower through hole (8), a leakage detection port (14) communicated with the sealed cavity (6) is formed in the outer wall of the sealing body (2), and the leakage detection port (14) is connected with an external detection device;
The heating cable (3) positioned in the metal outer heating armor (12) and the metal inner heating armor (11) comprises a conductor (15), a plating layer (16) and an insulating layer (17) which are sequentially arranged from inside to outside, a tail end connecting part (18) is arranged at the bottom of the heating cable (3), the conductor (15) is communicated with the metal outer heating armor (12) and the metal inner heating armor (11) through the tail end connecting part (18), the top end of the heating cable (3) is connected with a power supply end, current in the conductor (15) returns to the metal inner heating armor (11) and the metal outer heating armor (12) through the tail end connecting part (18), and the current in the metal inner heating armor (11) and the metal outer heating armor (12) flows at the inner side and becomes physical insulation at the outer side.
2. A heating cable high-pressure sealing device according to claim 1, characterized in that several sealing rings are arranged between the lower connecting end (5) of the sealing body (2) and the connecting end (10) of the sealing flange (1).
3. A heating cable high-pressure sealing device according to claim 2, characterized in that the plating (16) is one of tin plating, silver plating or nickel plating.
4. A heating cable high-voltage sealing device according to claim 3, characterized in that the metal inner heating armour layer (11) and the metal outer heating armour layer (12) are one of titanium steel or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911191086.XA CN111005697B (en) | 2019-11-28 | 2019-11-28 | Heating cable high-voltage sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911191086.XA CN111005697B (en) | 2019-11-28 | 2019-11-28 | Heating cable high-voltage sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111005697A CN111005697A (en) | 2020-04-14 |
| CN111005697B true CN111005697B (en) | 2024-08-09 |
Family
ID=70112262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911191086.XA Active CN111005697B (en) | 2019-11-28 | 2019-11-28 | Heating cable high-voltage sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111005697B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211397527U (en) * | 2019-11-28 | 2020-09-01 | 科莱斯（天津）电热科技有限公司 | High-pressure sealing device for heating cable |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178913A (en) * | 2015-08-05 | 2015-12-23 | 李宾飞 | Natural gas power generation electric heating wax removing and preventing device based on skin effect and application thereof |
| WO2018005892A1 (en) * | 2016-06-30 | 2018-01-04 | Bowen Jr Billy A | Test-port activated tubing hanger control valve |
| CN107071941B (en) * | 2016-12-29 | 2024-01-12 | 山东宝世达电缆科技有限公司 | Steel belt sheath variable-frequency heating cable for oil well |
| CN109707334B (en) * | 2019-01-21 | 2023-09-26 | 中国石油天然气股份有限公司 | A water injection well intelligent distribution cable wellhead sealing device |
-
2019
- 2019-11-28 CN CN201911191086.XA patent/CN111005697B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211397527U (en) * | 2019-11-28 | 2020-09-01 | 科莱斯（天津）电热科技有限公司 | High-pressure sealing device for heating cable |
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| Publication number | Publication date |
|---|---|
| CN111005697A (en) | 2020-04-14 |
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