CN209856541U - Intelligent nonmetal flexible pipe for oil production underground - Google Patents
Intelligent nonmetal flexible pipe for oil production underground Download PDFInfo
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- CN209856541U CN209856541U CN201821578029.8U CN201821578029U CN209856541U CN 209856541 U CN209856541 U CN 209856541U CN 201821578029 U CN201821578029 U CN 201821578029U CN 209856541 U CN209856541 U CN 209856541U
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Abstract
The utility model relates to an oil recovery is nonmetal flexible pipe of intelligence with in pit, including inner tube and outer tube be provided with the tensile sensing group of a plurality of circumference equipartition between inner tube and the outer tube, tensile sensing group comprises tensile fibre rope and sensing optical cable, tensile fibre rope, sensing optical cable all follow inner tube axial and arrange. The utility model discloses implant oil recovery underground inside with non-metallic flexible pipeline with tensile cordage and steel strand wires sense strain optical cable, not only can avoid laying once more of optical cable, protect the optical cable, improve body tensile strength, make it be applicable to comparatively harsh operating mode environment, still can survey location and safety monitoring with non-metallic pipe in the oil recovery underground, realize that the pipeline measures pit shaft and well site environmental parameter with high accuracy when the oil recovery borehole operation, and the steam generator has a simple structure, safety and reliability, the advantage that maneuverability is high.
Description
Technical Field
The utility model relates to an oil recovery is nonmetal flexible pipe of intelligence is used in the pit, especially a take oil recovery of pipeline spike and fiber sensor monitoring function to use nonmetal flexible pipe in the pit belongs to nonmetal flexible pipe intelligent monitoring technical field.
Background
During the development of oil fields, it is necessary to know the details of the well fluid retention and status during fluid production or water injection, which is critical to the reliability and accuracy of oil logging, and conventional electronic-based sensors cannot operate in harsh downhole environments such as high temperature, high pressure, corrosion, geomagnetic disturbances. Fiber optic sensors overcome these difficulties, are insensitive to electromagnetic interference and can withstand extreme conditions, including high temperatures, high pressures (above tens of megapascals) and strong shock and vibration, and can measure wellbore and well site environmental parameters with high accuracy. Meanwhile, the optical fiber sensor has distributed measurement capability, can measure the measured spatial distribution and give profile information. Moreover, the optical fiber sensor has small cross-sectional area, short appearance and extremely small occupied space in a shaft.
Through retrieval, Chinese patent with publication number CN021455023 proposes an intelligent online monitoring method for leakage of oil and gas pipelines based on a distributed optical fiber sensor, one or more optical cables are laid near the oil and gas pipelines and arranged in parallel with the oil and gas pipelines, and the optical fibers are used as the sensor to monitor the oil and gas pipelines in real time; chinese patent CN 10139904 discloses a method for monitoring the stress of a downhole casing by using an optical fiber sensor, which is to arrange the optical fiber grating sensor along the circumferential direction of the outer surface of the casing and monitor the circumferential strain of the casing by using a ground optical fiber grating demodulator connected with the optical fiber grating sensor. In the two patents, the optical cable is arranged outside the pipeline, so that the optical cable is easily influenced by external environmental factors and is easy to damage, and therefore, the detection positioning and the distributed online long-distance safety monitoring can be realized by adopting the technology of arranging the steel strand strain sensing optical cable with the built-in nonmetal flexible pipe.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the oil recovery that prior art exists temperature and pressure data acquisition work load are big in the pit, the problem of operating time length and acquisition process difficulty, provide an oil recovery is nonmetal flexible pipe of intelligence with in the pit, this nonmetal pipe is in order to coil the storage, long distance continuous installation to can effectively reduce the optical loss of built-in inductance strain steel strand wires optical cable, realize long distance on-line safety monitoring and spike.
In order to solve the technical problem, the utility model provides an oil recovery is nonmetal flexible pipe of intelligence with in pit, including inner tube and outer tube be provided with the tensile sensing group of a plurality of circumference equipartition between inner tube and the outer tube, tensile sensing group comprises tensile fibre rope and sensing optical cable, tensile fibre rope, sensing optical cable all follow the inner tube axial and arrange.
The utility model discloses the technical scheme who further injects is:
furthermore, the tensile fiber rope and the sensing optical cable are arranged on the outer wall of the inner tube side by side.
Furthermore, the tensile fiber rope is composed of a plurality of pre-tensioned tensile reinforced fibers.
Furthermore, the implantation pretensioning force of the tensile reinforced fibers is 100 +/-20 newtons, and the tensile reinforced fibers are aramid fibers, polyester fibers, carbon fibers or glass fibers.
Furthermore, the sensing optical cable is a steel strand strain sensing optical cable, and the implantation pretensioning force of the steel strand strain sensing optical cable is 0 Newton.
Further, the steel strand strain sensing optical cable comprises at least two temperature sensing optical fibers and at least two strain optical fibers, a sheath is sleeved outside the at least two temperature sensing optical fibers, and a coating layer, a steel strand layer and an outer protection layer are sequentially arranged on the outer wall of the sheath from inside to outside.
In the structure, the steel strand is used as the integral reinforcement of the optical fiber, the function of pipeline tracing is realized while the tensile property of the steel strand is improved, the steel strand is used as a pipeline tracing band to position the pipeline path, and the optical cable can detect the tensile strain of the pipe body. When the steel strand is used as a pipeline tracing band to position the pipeline path, the steel strand strain sensing optical cable can monitor the internal force and tensile deformation of the pipe body, and can monitor the temperature under the oil production well in real time.
Furthermore, the strain optical fibers are uniformly distributed in the outer protective layer.
Further, the strained optical fiber includes at least two free strained optical fibers and at least two non-free strained optical fibers disposed in a tight-buffered tube.
Because the Brillouin scattering light transmitted along the steel strand induction variable sensing optical cable is very sensitive to strain and temperature change, the strain optical fiber adopting the structure can eliminate the influence of temperature.
Furthermore, the outer protective layer is made of low-smoke halogen-free flame-retardant polypropylene materials or polyvinyl chloride.
The outer protection layer can be modified by materials to realize that the optical cable is not adhered to the pipe body after being implanted, and the stripping of the optical cable in the later laying process is facilitated.
Further, the inner pipe is made of PE100 oil and gas conveying materials or PE80 oil and gas conveying materials, and the outer pipe is made of PE100 oil and gas conveying materials or PE80 oil and gas conveying materials.
The utility model has the advantages that: the utility model discloses implant oil recovery underground inside with non-metallic flexible pipeline with tensile cordage and steel strand wires sense strain optical cable, not only can avoid laying once more of optical cable, protect the optical cable, improve body tensile strength, make it be applicable to comparatively harsh operating mode environment, still can survey location and safety monitoring with non-metallic pipe in the oil recovery underground, realize that the pipeline measures pit shaft and well site environmental parameter with high accuracy when the oil recovery borehole operation, and the steam generator has a simple structure, safety and reliability, the advantage that maneuverability is high.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the structure schematic diagram of the medium steel strand strain-sensing optical cable of the utility model.
In the figure: 1. the optical cable comprises a steel strand strain sensing optical cable, 2 tensile fiber ropes, 3 inner tubes, 4 outer tubes, 5 strain optical fibers, 6 temperature sensing optical fibers, 7 sheaths and 8 outer protective layers.
Detailed Description
Example 1
The oil recovery is nonmetal flexible pipe of intelligence for pit of this embodiment, its structure is shown in figure 1, including inner tube 3 and outer tube 4, is provided with the tensile sensing group of three circumference equipartitions between inner tube 3 and outer tube 4, and tensile sensing group comprises tensile fiber rope 3 and sensing optical cable. Wherein, tensile fiber rope 2, sensing optical cable all arrange along the inner tube axial to tensile fiber rope 2 sets up in the outer wall of inner tube 3 with sensing optical cable side by side. The inner pipe 3 is made of PE100 oil gas conveying materials or PE80 oil gas conveying materials, and the outer pipe 4 is made of PE100 oil gas conveying materials or PE80 oil gas conveying materials.
The tensile fiber rope 2 is composed of a plurality of tensile reinforced fibers which are pre-tensioned. The implantation pretension force of the tensile reinforced fiber is 100 +/-20 newtons, and the tensile reinforced fiber is aramid fiber, polyester fiber, carbon fiber or glass fiber. The number and material of the tensile reinforcement fibers depend on the specific engineering requirements.
The sensing optical cable is a steel strand strain sensing optical cable 1, and the implantation pretensioning force of the steel strand strain sensing optical cable 1 is 0 Newton. The steel strand sensing strain optical cable 1 comprises two temperature sensing optical fibers 6 and two strain optical fibers 5, a sheath 7 is sleeved outside the two temperature sensing optical fibers 6, a coating layer, a steel strand layer and an outer protection layer 8 are sequentially arranged on the outer wall of the sheath 7 from inside to outside, and the two strain optical fibers 5 are uniformly distributed in the outer protection layer 8 (see fig. 2). The outer protection layer 8 is made of low-smoke halogen-free flame-retardant polypropylene materials or polyvinyl chloride, the outer protection layer 8 can be modified by materials to achieve that the optical cable is not adhered to the pipe body after being implanted, and stripping of the optical cable in the later laying process is facilitated. The strain fibers 5 include two free strain fibers and two non-free strain fibers, both disposed in a tight jacket.
The nonmetal flexible pipe of this embodiment implants tensile sensing group between inner tube 3 and outer tube 4, can avoid the optical cable to lay again in the pipeline outside, and outer tube 4 and inner tube 3 can protect the optical cable simultaneously. The tensile fiber rope 2 of the tensile sensing group can improve the tensile property of the pipe body, so that the pipe body is suitable for harsh working condition environments; the steel strand strain sensing optical cable 1 of the tensile sensing group can be used for detecting, positioning and safely monitoring a non-metal pipe used in an oil extraction well, and the pipeline can be used for measuring the environmental parameters of a shaft and a well site in a high-precision mode during the operation of the oil extraction well. Wherein, the steel strand wires of steel strand wires strain sensing optical cable still have the function of pipeline tracer when improving self pull resistance as the whole reinforcement of optic fibre, and the steel strand wires are as pipeline tracer band and carry out pipeline route location, can detect the tensile strain of body like this through the optical cable. When the steel strand is used as a pipeline tracing band to position the pipeline path, the steel strand strain sensing optical cable 1 can monitor the internal force and tensile deformation of the pipe body, and can monitor the temperature under the oil production well in real time.
In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.
Claims (8)
1. The utility model provides an oil recovery is nonmetal flexible pipe of intelligence for pit, includes inner tube and outer tube, its characterized in that: be provided with the tensile sensing group of a plurality of circumference equipartition between inner tube and the outer tube, tensile sensing group comprises tensile fiber rope and sensing optical cable, tensile fiber rope, sensing optical cable all arrange along the inner tube axial, tensile fiber rope sets up in the outer wall of inner tube side by side with sensing optical cable, tensile fiber rope comprises the tensile reinforcing fiber of a plurality of pretensions.
2. The intelligent nonmetal flexible pipe for oil production well is according to claim 1, characterized in that: the implantation pretension force of the tensile reinforced fiber is 100 +/-20 newtons, and the tensile reinforced fiber is aramid fiber, polyester fiber, carbon fiber or glass fiber.
3. The intelligent nonmetal flexible pipe for oil production well is characterized in that: the sensing optical cable is a steel strand strain sensing optical cable, and the implantation pretensioning force of the steel strand strain sensing optical cable is 0 Newton.
4. The intelligent nonmetal flexible pipe for oil production well is according to claim 3, characterized in that: the steel strand strain sensing optical cable comprises at least two temperature sensing optical fibers and at least two strain optical fibers, wherein a sheath is sleeved outside the at least two temperature sensing optical fibers, and a coating layer, a steel strand layer and an outer protective layer are sequentially arranged on the outer wall of the sheath from inside to outside.
5. The intelligent nonmetal flexible pipe for oil production well is according to claim 4, characterized in that: the strain optical fibers are uniformly distributed in the outer protective layer.
6. The intelligent nonmetal flexible pipe for the oil production well is characterized in that: the strained optical fibers include at least two free strained optical fibers and at least two non-free strained optical fibers disposed in a tight-buffered tube.
7. The intelligent nonmetal flexible pipe for oil production well is according to claim 6, characterized in that: the outer protective layer is made of low-smoke halogen-free flame-retardant polypropylene materials or polyvinyl chloride.
8. The intelligent nonmetal flexible pipe for oil production well is characterized in that: the inner pipe is made of PE100 oil gas conveying materials or PE80 oil gas conveying materials, and the outer pipe is made of PE100 oil gas conveying materials or PE80 oil gas conveying materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821578029.8U CN209856541U (en) | 2018-09-26 | 2018-09-26 | Intelligent nonmetal flexible pipe for oil production underground |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821578029.8U CN209856541U (en) | 2018-09-26 | 2018-09-26 | Intelligent nonmetal flexible pipe for oil production underground |
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| Publication Number | Publication Date |
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| CN209856541U true CN209856541U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821578029.8U Active CN209856541U (en) | 2018-09-26 | 2018-09-26 | Intelligent nonmetal flexible pipe for oil production underground |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983244A (en) * | 2021-10-10 | 2022-01-28 | 中国通信建设第一工程局有限公司 | Compound oil gas hose with optical fiber communication and monitoring functions |
-
2018
- 2018-09-26 CN CN201821578029.8U patent/CN209856541U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983244A (en) * | 2021-10-10 | 2022-01-28 | 中国通信建设第一工程局有限公司 | Compound oil gas hose with optical fiber communication and monitoring functions |
| CN113983244B (en) * | 2021-10-10 | 2024-02-13 | 中国通信建设第一工程局有限公司 | Composite oil-gas hose with optical fiber communication and monitoring functions |
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