CN101581220B - Built-in signal detection sensor for sand production of oil-gas wells - Google Patents
Built-in signal detection sensor for sand production of oil-gas wells Download PDFInfo
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- CN101581220B CN101581220B CN2009100230214A CN200910023021A CN101581220B CN 101581220 B CN101581220 B CN 101581220B CN 2009100230214 A CN2009100230214 A CN 2009100230214A CN 200910023021 A CN200910023021 A CN 200910023021A CN 101581220 B CN101581220 B CN 101581220B
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Abstract
The invention provides a built-in signal detection sensor for sand production of oil-gas wells. The sensor comprises a metal rod (1) which can be inserted into a pipeline, wherein the surface of the tail end of the metal rod 1 is surrounded with a piezoelectric film (2); the outer surface of the piezoelectric film (2) is covered with a PET metal film (3) for protection; the surface of the upper end of themetal rod (1) is provided with a screw (4) and a nut (5); a cavity (6) is arranged above the nut (5); a protection box (8) is buckled on the cavity (6); and a signal-conditioning circuit board (7) is arranged in the cavity (6). The sensor is inserted into an oil/gas conveying pipeline with sand; sand in fluid collides with the lower end of the metal rod (1); the piezoelectric film (2) generates charge between two poles after sensing the collision of the sand, and a coaxial cable (10) transmits charge signals to the signal-conditioning circuit board (7); and the charge signals are processed by the signal-conditioning circuit board (7) and then are output by a lead (11). The sensor has the characteristic of high sensitivity.
Description
Technical field
The invention belongs to sensor technical field, particularly a kind of built-in signal detection sensor for sand production of oil-gas wells that is used for the real-time sand production monitoring of oil gas well.
Background technology
In the oilfield recovery process; Rationally shaking out of oil gas well can be improved the production efficiency of oil gas; To damage petroleum machinery but shake out when serious, safety in production will be brought major hidden danger, also seriously influence production efficiency simultaneously; So monitor sand production of oil-gas wells in real time, the prediction situation of shaking out has great significance to oil and gas development.
Sound detection is adopted in the sand production monitoring of oil gas well more, the at present domestic sensor of also not seeing the input that is used to shake out.External this technical situation is following:
(patent No.: the sensor of mentioning US4131815) adopts piezoelectric ceramics as position-sensing unit to United States Patent (USP); The bar that utilizes stainless steel material is as transmission acoustic vibration signal; Piezoelectric ceramics is placed on the top of bar; Experience the signal that sand grains impacts bar, obtain useful signal after this signal process filtering, the amplification, extrapolate the sand content of fluid in the pipeline.But so cause the decay of energy in the transmission, there is the not high shortcoming of sensitivity because piezoelectric ceramics is placed on the top of rod in this sensor.(patent No.: US4240287), mainly introduced the method for surveying sand, the signal transducer that shakes out that this method is selected for use also utilizes piezoelectric ceramics as position-sensing unit, but does not provide the concrete structure of sensor at United States Patent (USP) equally.
Another kind of built-in survey sand sensor is (the seeing SPE30644) of resistivity formula; Its operating principle is: the probe that particulate metal material of a kind of length, width, fixed thickness is processed inserts in the pipeline; When sand grains and the collision of this metal probe, cause the damaged of amount of metal, the damaged variation that causes resistivity of this amount of metal.When this metal probe is applied constant current; This change in resistance must cause the upward variation of voltage of this probe, thereby can calculate the sand content in the oil gas water, but the maximum shortcoming of this sensor is to use the life-span short; When emat sensor more, can influence ordinary production.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of built-in signal detection sensor for sand production of oil-gas wells, continued sand production, the disaster that can be used for the oil gas well detection of the signal that shakes out such as shake out has highly sensitive characteristics.
In order to achieve the above object, concrete technical scheme of the present invention is following:
A kind of built-in signal detection sensor for sand production of oil-gas wells; Comprise that one can insert ducted metal bar 1, the end surface of metal bar 1 is surrounded with piezoelectric membrane 2, and the external surface of piezoelectric membrane 2 has covered PET metallic film 3; The upper end face of metal bar 1 is provided with screw 4, nut 5; The top of nut 5 is a cavity 6, and protection box 8 is buckled on the cavity 6, and signal conditioning circuit plate 7 is installed in the cavity 6.
The wire of output terminal 11 of described signal conditioning circuit plate 7 is drawn from the side of protection box 8.
Described piezoelectric membrane 2 links to each other with signal conditioning circuit plate 7 through coaxial wire 10.
The described tip length that is surrounded with the metal bar 1 of piezoelectric membrane 2 must surpass below the central axis of pipeline.
The border that covers of described PET metallic film 3 is greater than piezoelectric membrane 2 borders 3mm at least.
Because the present invention directly is wrapped in the end of metal bar 1 with piezoelectric membrane 2, the sand grains in the fluid can direct collision piezoelectric membrane 2 position-sensing units, so susceptibility is sensitive, and the precision height; Signal conditioning circuit plate 7 is directly installed in the upper end cavity 6 of metal bar 1, the charge signal that shakes out of experiencing piezoelectric membrane 2 converts different amplitude voltage signals to, thereby has reduced the loss of electric charge, and also the further processing for the signal that shakes out provides condition.
Description of drawings
Accompanying drawing is a structure principle chart of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
With reference to accompanying drawing; A kind of built-in signal detection sensor for sand production of oil-gas wells comprises that one can insert the metal bar 1 of pipeline, and the end surface of metal bar 1 is surrounded with piezoelectric membrane 2; The external surface of piezoelectric membrane 2 has covered PET metallic film 3 and has protected; The border that covers of PET metallic film 3 is greater than piezoelectric membrane 2 borders 3mm at least, guarantee fluid do not contact the surface electrode of piezoelectric membrane 2 and be not seeped into metal bar 1 and piezoelectric membrane 2 between, the upper end face of metal bar 1 is provided with screw 4, hex nut 5; Be fixed tightly in metal bar 1 on the pipeline with spanner with convenient during actual the use; The top of hex nut 5 is a cavity 6, and signal conditioning circuit plate 7 is installed in the cavity 6, and piezoelectric membrane 2 links to each other with signal conditioning circuit plate 7 through coaxial wire 10; Protection box 8 is buckled on the cavity 6, through three screws 9 and sealing mat 12 fixing seal cavitys 6.
Described essential the surpassing below the central axis of pipeline of tip length that is surrounded with the metal bar 1 of piezoelectric membrane 2, this is because of sand grains because the many latter halfs in pipeline of action of gravity flow; Moreover also in order to reduce the corrosion of sand grains to metal bar.
Operating principle of the present invention is: the present invention is inserted in the oil transportation/feed channel that carries sand grains; Paying special attention to metal bar of the present invention 1 lower end must be positioned at below the central axis of pipeline; Sand grains in the fluid collides the lower end of metal bar 1; Piezoelectric membrane 2 produces electric charge at two interpolars after experiencing the collision of sand grains, and this charge signal passes to it in signal conditioning circuit 7 through coaxial wire 10, handles the back by lead 11 outputs through signal conditioning circuit 7.
Claims (5)
1. a built-in signal detection sensor for sand production of oil-gas wells comprises that one can insert ducted metal bar (1), it is characterized in that; The end surface of metal bar (1) is surrounded with piezoelectric membrane (2); The external surface of piezoelectric membrane (2) has covered PET metallic film (3), and the upper end face of metal bar (1) is provided with screw (4), nut (5), and the top of nut (5) is a cavity (6); Protection box (8) is buckled on the cavity (6), and signal conditioning circuit plate (7) is installed in the cavity (6).
2. a kind of built-in signal detection sensor for sand production of oil-gas wells according to claim 1 is characterized in that, the wire of output terminal (11) of described signal conditioning circuit plate (7) is drawn from the side of protection box (8).
3. a kind of built-in signal detection sensor for sand production of oil-gas wells according to claim 1 is characterized in that, described piezoelectric membrane (2) links to each other with signal conditioning circuit plate (7) through coaxial wire (10).
4. a kind of built-in signal detection sensor for sand production of oil-gas wells according to claim 1 is characterized in that, the described tip length that is surrounded with the metal bar (1) of piezoelectric membrane (2) must surpass below the central axis of pipeline.
5. a kind of built-in signal detection sensor for sand production of oil-gas wells according to claim 1 is characterized in that, the border that covers of described PET metallic film (3) is greater than piezoelectric membrane (2) border 3mm at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100230214A CN101581220B (en) | 2009-06-23 | 2009-06-23 | Built-in signal detection sensor for sand production of oil-gas wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100230214A CN101581220B (en) | 2009-06-23 | 2009-06-23 | Built-in signal detection sensor for sand production of oil-gas wells |
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| Publication Number | Publication Date |
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| CN101581220A CN101581220A (en) | 2009-11-18 |
| CN101581220B true CN101581220B (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100230214A Expired - Fee Related CN101581220B (en) | 2009-06-23 | 2009-06-23 | Built-in signal detection sensor for sand production of oil-gas wells |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915090B (en) * | 2010-07-29 | 2013-04-24 | 中国海洋石油总公司 | System and method for monitoring sand production rate of oil-gas well |
| US10698427B2 (en) | 2016-10-31 | 2020-06-30 | Ge Oil & Gas Pressure Control Lp | System and method for assessing sand flow rate |
| CN109283250B (en) * | 2017-07-19 | 2020-12-01 | 中国科学院声学研究所 | Quantitative evaluation method for well wall defects based on cylindrical surface ultrasonic phased array |
| CN108915609B (en) * | 2018-07-20 | 2020-11-10 | 中国石油大学(华东) | Intelligent marine drilling riser single joint |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4131815A (en) * | 1977-02-23 | 1978-12-26 | Oceanography International Corporation | Solid piezoelectric sand detection probes |
| US4240287A (en) * | 1977-12-20 | 1980-12-23 | Shell Oil Company | Sand detection |
| US5740863A (en) * | 1996-05-21 | 1998-04-21 | Fmc Corporation | Subsea wellhead mechanical erosion detector |
| CN2771856Y (en) * | 2005-02-05 | 2006-04-12 | 赵江青 | Analogue monitoring device for oily saturation field |
-
2009
- 2009-06-23 CN CN2009100230214A patent/CN101581220B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4131815A (en) * | 1977-02-23 | 1978-12-26 | Oceanography International Corporation | Solid piezoelectric sand detection probes |
| US4240287A (en) * | 1977-12-20 | 1980-12-23 | Shell Oil Company | Sand detection |
| US5740863A (en) * | 1996-05-21 | 1998-04-21 | Fmc Corporation | Subsea wellhead mechanical erosion detector |
| CN2771856Y (en) * | 2005-02-05 | 2006-04-12 | 赵江青 | Analogue monitoring device for oily saturation field |
Non-Patent Citations (1)
| Title |
|---|
| 赵东升.PVDF压电薄膜制作传感器的理论研究.《计算机测量与控制》.2005,第13卷(第7期),第748-750页. * |
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| CN101581220A (en) | 2009-11-18 |
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