CN116224518A - Underground optical fiber fixing device and installation method thereof - Google Patents
Underground optical fiber fixing device and installation method thereof Download PDFInfo
- Publication number
- CN116224518A CN116224518A CN202310233614.3A CN202310233614A CN116224518A CN 116224518 A CN116224518 A CN 116224518A CN 202310233614 A CN202310233614 A CN 202310233614A CN 116224518 A CN116224518 A CN 116224518A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- outer tube
- fixing
- downhole
- piece
- 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.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009434 installation Methods 0.000 title abstract description 7
- 239000000835 fiber Substances 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 22
- 230000008569 process Effects 0.000 abstract description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 11
- 239000001569 carbon dioxide Substances 0.000 abstract description 11
- 238000002347 injection Methods 0.000 abstract description 9
- 239000007924 injection Substances 0.000 abstract description 9
- 238000005553 drilling Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
Images
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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/4459—Ducts; Conduits; Hollow tubes for air blown fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
- G02B6/504—Installation in solid material, e.g. underground
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
According to the underground optical fiber fixing device and the installation method thereof, the optical fiber is fixed underground through the outer tube in the drilling process, the outer tube of the device is contacted with the well wall through the fixing piece and the supporting piece, the optical fiber is effectively protected from being damaged in the later carbon dioxide injection process, the device can fix the optical fiber at the central position outside the underground casing, and the optical fiber is prevented from forming a measuring error due to too close distance between the optical fiber and the underground casing or the outer well wall, so that the measuring precision of an instrument is affected. The contained angle size is adjustable between support piece and the mounting, can satisfy the operation in pit of different diameters, and the mounting adopts the detachable connection with the outer tube simultaneously, easy to assemble and later stage dismantlement.
Description
Technical Field
The application relates to the technical field of oil and gas field development, in particular to an underground optical fiber fixing device and an installation method thereof.
Background
The pressure and the temperature are basic oil reservoir engineering parameters in oil and gas resource development, and the real-time and high-precision measurement of the pressure and the temperature is of great significance for determining the position and the thickness of an oil layer, the depth of a water-bearing layer and the model of a water/steam layer operation pipe. At present, the optical fiber logging mode has the advantages of high measurement precision, high signal response speed, no electrification and no electromagnetic interference; the working temperature is high and can reach 300 degrees, and the like, and the system can effectively and continuously monitor the development dynamics of the oil and gas reservoir. Particularly during the sequestration of a salty carbon dioxide water layer, reservoir pressure increases gradually as carbon dioxide is injected. In order to adjust the injection mode in real time, underground temperature and pressure need to be monitored, and optical fiber equipment needs to be added in an injection well.
The traditional underground optical fiber fixing device has the problems of large drift, low precision, short service life and the like under a high-temperature environment, so that the requirement of underground permanent monitoring is difficult to meet. The current common method is that after stopping injecting carbon dioxide, an optical fiber is arranged in a shaft, which is time-consuming and labor-consuming and can not realize long-term monitoring. However, the operation of the optical fiber sensor in the well is not performed any more during the injection process, and thus, there is a need for a downhole optical fiber fixing device capable of ensuring that the optical fiber is normally monitored without being damaged during the carbon dioxide injection process.
Disclosure of Invention
In view of the above, the present application provides a downhole optical fiber permanent fixing device and a use method thereof, which fix an optical fiber downhole during a drilling process and protect the optical fiber from damage during a post carbon dioxide injection process.
In order to solve the technical problems, the application provides the following technical scheme:
in a first aspect, the present application provides a downhole optical fiber fixing device and a method of installing the same, comprising:
the outer tube is of an annular structure, and the optical fiber is arranged in the annular space of the outer tube;
the fixing piece is coaxially arranged with the outer tube and detachably connected with the outer tube, and the fixing piece comprises a plurality of fixing pieces;
the supporting piece is connected with the fixing piece and the well wall, the size of an included angle formed by the supporting piece and the fixing piece is adjustable, and the distance between the outer tube and the well wall can be adjusted.
Preferably, the outer wall of the outer tube is provided with a plurality of raised locking heads, one side of the fixing piece, which is close to the outer tube, is provided with grooves with the same size as the locking heads, and the grooves are in one-to-one correspondence with the locking heads.
Preferably, the fixing members are equally spaced.
Preferably, one end of the supporting piece is connected with the fixing piece through a rotating shaft, and the other end of the supporting piece is abutted to the well wall.
Preferably, a spring is arranged between the outer side of one end of the fixing piece, which is close to the supporting piece, and the inner side of one end of the supporting piece, which is close to the fixing piece.
Preferably, the support member has an annular structure, and an opening at an end of the support member near the well wall is larger than an opening at an end of the support member near the fixing member.
Preferably, the support member has a tubular structure, and an end of the support member adjacent to the well wall is located above an end of the support member adjacent to the fixing member.
Preferably, a plurality of the supporting members are provided on each of the fixing members.
Preferably, the spacing between each of the support members is equal.
In a second aspect, the present application provides a downhole optical fiber securing device as described above, comprising:
placing an optical fiber into an outer tube, the outer tube being disposed within a well;
the outer tube is sleeved with the fixer, the fixer is rotated, so that the tapered end of the side wall of the outer tube falls into the groove on the inner side of the fixer, the fixer is abutted with the well wall through the supporting piece, and the supporting piece can rotate.
According to the technical scheme, the downhole optical fiber fixing device and the installation method thereof are provided, the optical fiber is fixed underground through the outer tube in the drilling process, the outer tube of the device is connected with the well wall through the fixing piece and the supporting piece, the optical fiber is effectively protected from being damaged in the later carbon dioxide injection process, the device can fix the optical fiber at the central position outside the downhole casing, and the optical fiber is prevented from generating measurement errors too close to the downhole casing or the outer well wall, so that the instrument measurement accuracy is affected. The contained angle size is adjustable between support piece and the mounting, can satisfy the operation in pit of different diameters, and the mounting adopts the detachable connection with the outer tube simultaneously, easy to assemble and later stage dismantlement.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a downhole optical fiber fixing device according to an embodiment of the present application.
FIG. 2 is a schematic top view of a downhole fiber optic fixture mount according to an embodiment of the present application.
FIG. 3 is a schematic side view of a downhole fiber optic fixture mount according to an embodiment of the present application.
Reference numerals: 1. an optical fiber; 2. an outer tube; 3. a holder; 4. a support; 5. a rotating shaft; 6. an inner tank; 7. a spring; 8. a fixed table; 9. a fixed table notch; 10. a lock head.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the sealing process of the salty water layer of carbon dioxide, as carbon dioxide is injected, the reservoir pressure gradually increases, underground temperature and pressure need to be monitored, and optical fiber equipment needs to be added in an injection well. The current common method is that after stopping injecting carbon dioxide, an optical fiber is arranged in a shaft, which is time-consuming and labor-consuming and can not realize long-term monitoring.
Based on the foregoing, the present application provides an embodiment of a downhole fiber optic permanent fixture, see FIG. 1, comprising: an outer tube 2, a fixing member 3 and a supporting member 4.
The optical fiber device comprises an outer tube 2, wherein the outer tube 2 is of an annular structure, and an optical fiber 1 is arranged in an annular space of the outer tube 2;
the fixing pieces 3 are coaxially arranged with the outer tube 2, and detachably connected with the outer tube 2, and the fixing pieces 3 comprise a plurality of fixing pieces;
the support piece 4, the support piece 4 is connected mounting 3 and wall of a well, the support piece 4 with the contained angle size that mounting 3 formed is adjustable, can adjust the interval of outer tube 2 and wall of a well.
In a specific embodiment, the used optical fiber 1 is placed in the outer tube 2, referring to fig. 2, the outer wall of the outer tube 2 is provided with a plurality of raised locking heads 10, the fixing piece 3 comprises a groove 6 matched with the locking heads 10, a fixing table 8 and a fixing table notch 9, the fixing table notch 9 is arranged beside the groove 6, the fixing piece 3 is sleeved into the outer tube 2 and falls down to the locking heads 10, the outer tube 2 is rotated to enable the locking heads 10 to fall into the groove 6 of the fixing piece 3, namely, the fixing piece 3 is locked, the outer tube 2 is rotated in the opposite direction to enable the locking heads 10 to move to the fixing table notch 9, namely, the fixing piece 3 is unlocked, therefore, the device has the self-locking and unlocking functions, namely, the fixing piece 3 and the outer tube 2 are rotated in a set direction for a certain angle to lock the fixing piece 3; the outer tube 2 is rotated in the opposite direction to unlock the fixing piece 3, so that the installation and the disassembly in the construction process are convenient. In this application, in order that outer tube 2 can effectively protect optic fibre, the outer tube 2 material of selection should have certain hardness, and high temperature resistant, does not influence optic fibre collection data simultaneously.
In a specific embodiment, referring to fig. 3, one end of the supporting element 4 is connected with the fixing element 3 through the rotating shaft 5, the other end of the supporting element 4 is abutted against the well wall, the outer side of one end of the fixing element 3, which is close to the supporting element 4, and the inner side of one end of the supporting element 4, which is close to the fixing element 3, are provided with springs 7, and due to the fact that the springs 7 are provided, the included angle between the supporting element 4 and the fixing element 3 can only be adjusted within a set range, and meanwhile, one end of the supporting element 4, which is close to the fixing element 3, is located below one end, which is far away from the fixing element 3, so that the supporting element 4 is fixed on the well wall along the direction in the well (namely, can smoothly enter in the direction in the well, can not move in the direction out of the well, and plays a role of fixing), and the outer tube, in which the optical fiber is located, can be ensured to be kept at the central part between the casing and the well.
In some other embodiments, the supporting members 4 may be in a circular ring structure or a tubular structure, when the supporting members 4 are in a circular ring structure, each fixing member 3 is provided with one supporting member 4, the supporting members 4 are sleeved outside the fixing member 3, and the diameter of an upper end opening of the supporting member 4 is larger than that of a lower end opening. In the case of a tubular structure, each holder 3 is provided with a plurality of holders 4 for further fixing the position of the support sleeve downhole, the holders 4 being arranged obliquely downhole.
In a specific embodiment, the spacing between every two adjacent fixing members 3 on the outer tube 2 is equal, and in this application, the spacing between the fixing members 3 is preferably 3 meters.
According to the underground optical fiber fixing device and the installation method thereof, the optical fiber is fixed underground through the outer tube in the drilling process, the outer tube of the device is connected with the well wall through the fixing piece and the supporting piece, the optical fiber is effectively protected from being damaged in the later carbon dioxide injection process, the device can fix the optical fiber at the central position outside the underground casing, and the optical fiber is prevented from generating measurement errors too close to the underground casing or the outer well wall (well hole), so that the instrument measurement accuracy is affected. The contained angle size is adjustable between support piece and the mounting, can satisfy the operation in pit of different diameters, and the mounting adopts the detachable connection with the outer tube simultaneously, easy to assemble and later stage dismantlement.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example.
Furthermore, the various embodiments or examples described in this specification and the features of the various embodiments or examples may be combined and combined by those skilled in the art without contradiction. The above description is merely an embodiment of the present specification and is not intended to limit the present specification. Various modifications and changes may be made to the embodiments herein by those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is made within the spirit and principle of the embodiments of the present specification, should be included in the scope of the claims of the embodiments of the present specification.
Claims (10)
1. A downhole fiber optic securing device, comprising:
the outer tube is of an annular structure, and the optical fiber is arranged in the annular space of the outer tube;
the fixing piece is coaxially arranged with the outer tube and detachably connected with the outer tube, and the fixing piece comprises a plurality of fixing pieces;
the supporting piece is connected with the fixing piece and the well wall, the size of an included angle formed by the supporting piece and the fixing piece is adjustable, and the distance between the outer tube and the well wall can be adjusted.
2. The downhole optical fiber fixing device according to claim 1, wherein the outer wall of the outer tube is provided with a plurality of raised locking heads, one side of the fixing piece, which is close to the outer tube, is provided with grooves with the same size as the locking heads, and the grooves are in one-to-one correspondence with the locking heads.
3. A downhole optical fiber securing device according to claim 2 wherein each of said securing members are equally spaced.
4. A downhole optical fiber fixing apparatus according to claim 3, wherein one end of the supporting member is connected to the fixing member via a rotation shaft, and the other end of the supporting member abuts against the well wall.
5. The downhole optical fiber securing device according to claim 4, wherein a spring is provided between an outer side of the securing member adjacent to the support member and an inner side of the support member adjacent to the securing member.
6. The downhole optical fiber securing device according to claim 5, wherein the support member has a ring-like configuration, an end of the support member adjacent the borehole wall opening being larger than an end of the support member adjacent the securing member.
7. The downhole optical fiber securing device according to claim 5 wherein said support member is a tubular structure, an end of said support member adjacent said borehole wall being positioned above an end adjacent said securing member.
8. A downhole optical fiber securing device according to claim 7, wherein a plurality of said support members are provided on each of said securing members.
9. The downhole fiber optic securing device of claim 8, wherein the spacing between each of the support members is equal.
10. A method of installing a downhole optical fiber securing device according to claims 1 to 9, comprising:
placing an optical fiber into an outer tube, the outer tube being disposed within a well;
the outer tube is sleeved with the fixer, the fixer is rotated, so that the tapered end of the side wall of the outer tube falls into the groove on the inner side of the fixer, the fixer is abutted with the well wall through the supporting piece, and the supporting piece can rotate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310233614.3A CN116224518A (en) | 2023-03-03 | 2023-03-03 | Underground optical fiber fixing device and installation method thereof |
| PCT/CN2024/079421 WO2024183615A1 (en) | 2023-03-03 | 2024-02-29 | Downhole optical fiber fixing device and mounting method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310233614.3A CN116224518A (en) | 2023-03-03 | 2023-03-03 | Underground optical fiber fixing device and installation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116224518A true CN116224518A (en) | 2023-06-06 |
Family
ID=86584249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310233614.3A Pending CN116224518A (en) | 2023-03-03 | 2023-03-03 | Underground optical fiber fixing device and installation method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116224518A (en) |
| WO (1) | WO2024183615A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024183615A1 (en) * | 2023-03-03 | 2024-09-12 | 中国华能集团清洁能源技术研究院有限公司 | Downhole optical fiber fixing device and mounting method therefor |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110036566A1 (en) * | 2009-08-17 | 2011-02-17 | Baker Hughes Incorporated | Attachment of control lines to outside of tubular |
| US8302697B2 (en) * | 2010-07-29 | 2012-11-06 | Halliburton Energy Services, Inc. | Installation of tubular strings with lines secured thereto in subterranean wells |
| RU2640342C1 (en) * | 2017-02-20 | 2017-12-27 | Общество с ограниченной ответственностью "ПРЕМИУМ-ГРУПП" | Device for performing geophysical investigations (versions) |
| CN208396704U (en) * | 2018-06-12 | 2019-01-18 | 晋城市梅博科贸有限公司 | A kind of remote determination of coal seam gas pressure device |
| US20220357479A1 (en) * | 2021-05-10 | 2022-11-10 | Quidnet Energy Inc. | Method and Apparatus for Fracture Width Measurement |
| CN115013037A (en) * | 2022-01-11 | 2022-09-06 | 安徽机电职业技术学院 | Non-return device for preventing mine drilling air exhaust pipe from retreating |
| CN217380449U (en) * | 2022-05-07 | 2022-09-06 | 陕西省煤田地质集团有限公司 | Spacing righting device of hot well temperature measurement probe in pit |
| CN217506227U (en) * | 2022-05-25 | 2022-09-27 | 中国煤炭地质总局水文地质局 | Geothermal temperature and pressure measuring optical fiber fixing device |
| CN115012828A (en) * | 2022-07-01 | 2022-09-06 | 吕梁学院 | Coal mine underground drilling device based on fiber bragg grating |
| CN116224518A (en) * | 2023-03-03 | 2023-06-06 | 中国华能集团有限公司 | Underground optical fiber fixing device and installation method thereof |
-
2023
- 2023-03-03 CN CN202310233614.3A patent/CN116224518A/en active Pending
-
2024
- 2024-02-29 WO PCT/CN2024/079421 patent/WO2024183615A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024183615A1 (en) * | 2023-03-03 | 2024-09-12 | 中国华能集团清洁能源技术研究院有限公司 | Downhole optical fiber fixing device and mounting method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024183615A1 (en) | 2024-09-12 |
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