CN201041034Y - Sensor for measuring downhole temperature - Google Patents
Sensor for measuring downhole temperature Download PDFInfo
- Publication number
- CN201041034Y CN201041034Y CNU2007201040374U CN200720104037U CN201041034Y CN 201041034 Y CN201041034 Y CN 201041034Y CN U2007201040374 U CNU2007201040374 U CN U2007201040374U CN 200720104037 U CN200720104037 U CN 200720104037U CN 201041034 Y CN201041034 Y CN 201041034Y
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- protection shell
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Abstract
The utility model relates to a sensor for measuring the underground temperature. The utility model is applied on measurement of petroleum underground temperature. The utility model is characterized in that one end of a sensor protection shell is a column shape which has a diameter between 6 - 3 mm, and a length between 20 - 40 mm. A central hole whose bottom part is padded with magnesium oxide powder is arranged in the sensor protection shell. A two-wire platinum resistance and an extension wire are arranged at the central hole. Wherein, the two-wire platinum resistance is buried in the magnesium oxide powder, and the central hole is injected with heat conducting silicone grease. Moreover, the central hole is also injected with high temperature resistance sealing resin which is crammed in the central hole. After the cramming is finished, the utility model is put into an oven to be heated and solidified. The effect of the utility model is that the utility model adopts the integral sensor protection shell and the structure that the platinum resistance is far from the big volume part, which makes the sensor has sensitive reaction to heat, and small well measurement data error. Moreover, the utility model has the advantages of high temperature and pressure resistance, and good insulation performance, which satisfies the use requirement of temperature measurement when measuring wells. Therefore, the utility model has prominent effect for accurately knowing the terrane temperature in oil wells, the low temperature gradient, and the well temperature.
Description
Technical field
The utility model relates to the oil exploration logger, the temperature pick up of particularly a kind of down-hole thermometric.Be a kind of temperature of measuring formation downhole, geothermal gradient, well temperature etc., but continuous measurement well temperature provide the sensor of accurate data for well log interpretation.
Background technology
Through patent retrieval, 89 pieces of the domestic literatures relevant with the utility model, Xiang Guan foreign literature is also retrieved therewith, does not find the document similar or identical with the utility model.
It is at present, domestic that what install in logger is temperature pick up column type temperature pick up.Consult Fig. 1.The column type temperature pick up is made up of sensor holder 6, insulator 1, heat carrier 2, two-wire system RTD 4, heat-conducting silicone grease 3, RTD pedestal 9, lead 8, screw 7 and O-ring seals 5.Sensor holder 6 contacts with tool housing, for the temperature that prevents tool housing is passed to the temperature that heat carrier 2 causes accurately measuring down-hole slurry, so between sensor holder 6 and heat carrier 2, insulator 1 is arranged, like this, heat carrier 2 is delivered to the temperature of down-hole slurry on the two-wire system RTD 4 rapidly by heat-conducting silicone grease 3, the temperature pick up of this form, the sealing performance insulating properties are good, but,, reach the overlong time that heat balance needs because the heat carrier volume is excessive in its structure, RTD is not away from the large volume position in addition, therefore, its thermotonus seriously lags behind, and measure error is excessive, by repeatedly well logging test, can't satisfy instructions for use.
Summary of the invention
The purpose of this utility model provides a kind of sensor of measuring downhole temperature, adopts aciculiform integral sensor containment vessel, and RTD satisfies thermometric instructions for use when logging well away from the large volume position.Solve the big problem of downhole temperature measure error in the well logging process, improve the accuracy that rock temperature, low temperature gradients and well temperature are measured in the oil well.Overcoming the reflection of prior art measurement temperature has phenomenon afterwards, measures the big deficiency of temperature error.
The technical solution of the utility model is: the sensor of measuring downhole temperature comprises sensor protection shell, two-wire system RTD, thermal conductance silicone grease and extension lead.One end of sensor protection shell has external screw thread, temperature pick up under the measuring well can be threaded on the logger shell.In the seal groove of sensor protection shell outer wall, O-ring seals is housed.It is characterized in that: the sensor protection shell other end is cylindric, and diameter is between the 6-3 millimeter, and length is between the 20-40 millimeter.A centre bore is arranged in the sensor protection shell, be filled with magnesia powder in the bottom of centre bore.Two-wire system RTD and extension lead are arranged in centre bore, and two-wire system RTD and extension lead adopt the welding of high temperature scolding tin.The two-wire system RTD is embedded in the magnesia powder.Avoid two-wire system RTD feeler containment vessel, magnesia powder plays stabilizing agent, insulating effect herein.Filling heat-conductive silicone grease in centre bore, heat-conducting silicone grease should be close to magnesia powder.Also be injected with the refractory seals resin in centre bore, sealing resin fills up centre bore.After finishing, filling puts into the baking oven internal heating curing.
Technical characterictic of the present utility model is a monolithic for the sensor protection shell, and connecting link is few, the reliability height; The two-wire system RTD is placed on the head of temperature pick up; away from sensor connecting portion and tool housing; the influence that transmitted by the temperature of sensor large volume position and tool housing is very little; wall because of sensor protection shell head is thin again; so; in the well logging process; RTD in the temperature pick up can be experienced the temperature of mud in the well rapidly; with the resistance output after the RTD variation; magnesia powder has played firm effect to the two-wire system RTD; the reason instrument is not impacted and RTD is contacted or the thin legs break that is used for welding lead is split with tool housing in the well logging process; the heat-conducting silicone grease thermal conductivity is good; the insulating properties height can be passed to RTD rapidly with the heat of temperature pick up head impression, has played good facilitation to improving thermal response speed.
The beneficial effects of the utility model are: the sensor of this measurement downhole temperature adopts the integral sensor containment vessel; RTD is away from large volume position structure; make temperature pick up thermal response sensitivity; the well-log information error less than; high pressure resistant; high temperature resistant, good insulation preformance, thermometric instructions for use when having satisfied well logging.Solved the big problem of downhole temperature measure error in the well logging process, temperature, low temperature gradients and the well temperature etc. of understanding rock stratum in the oil well have exactly been played conclusive effect.Overcome prior art and measured after the temperature reflection, measured the big deficiency of the temperature difference.
Description of drawings
Fig. 1 is the structural profile schematic diagram of original technology column type temperature pick up.
Fig. 2 measures the whole structural profile schematic diagram of sensor of downhole temperature for the utility model.
The specific embodiment
Embodiment 1: consult Fig. 1.10 millimeters of one end stepped diameters of its sensor protection shell 13 of sensor of the utility model measurement downhole temperature, there is the external screw thread of M8 the end, temperature pick up under the measuring well can be threaded on the logger shell 18 in use.O-ring seals (15) is housed in the seal groove of sensor protection shell (13) outer wall.Sensor protection shell 13 other ends are cylindric, 5 millimeters of diameters, and length is at 25 millimeters.A centre bore is arranged in the sensor protection shell 13, and centre bore is an obstructed hole.3 millimeters of the diameters of centre bore.Be filled with magnesia powder (11) in the bottom of centre bore.Two-wire system RTD (14) and extension lead (17) are arranged in centre bore, and two-wire system RTD (14) and extension lead (17) adopt the welding of high temperature scolding tin.Two-wire system RTD (14) is embedded in the magnesia powder (11).Filling heat-conductive silicone grease (12) in centre bore, heat-conducting silicone grease (12) is close to magnesia powder (11).Also be injected with refractory seals resin (16) in centre bore, sealing resin (16) fills up centre bore.Expose outside extension lead (17) end.After finishing, filling puts into the baking oven internal heating curing.
The utility model is measured the sensor of downhole temperature, through repeatedly temperature cycling test and on-the-spot well logging evidence, thermal response sensitivity, temperature cycling test show, reach the resistance required time of corresponding 100 ℃ of Pt100 less than 25 seconds from room temperature to 100 a ℃ boiled water temperature sensor output resistance.The well-log information that field experiment obtains shows, the key hole well section temperature of surveying with demarcate the temperature basically identical, error is less than ± 1%.This sensor can be worked under 155 ℃, the condition of 100MPa, and insulaion resistance is not less than 100M Ω under the HTHP, and certainty of measurement is less than ± 1%F.S, the utility model temperature pick up reliability height, applied range.
Claims (2)
1. a sensor of measuring downhole temperature comprises sensor protection shell (13); two-wire system RTD (14); thermal conductance silicone grease (12) and extension lead (17); one end of sensor protection shell (13) has external screw thread; O-ring seals (15) is housed in the seal groove of sensor protection shell (13) outer wall; it is characterized in that: sensor protection shell (13) other end is cylindric; diameter is between the 6-3 millimeter; length is between the 20-40 millimeter; a centre bore is arranged in the sensor protection shell (13); be filled with magnesia powder (11) in the bottom of centre bore; two-wire system RTD (14) and extension lead (17) are arranged in centre bore; two-wire system RTD (14) and extension lead (17) adopt the welding of high temperature scolding tin; two-wire system RTD (14) is embedded in the magnesia powder (11); filling heat-conductive silicone grease (12) in centre bore; heat-conducting silicone grease (12) should be close to magnesia powder (11); in centre bore, also be injected with refractory seals resin (16); sealing resin (16) fills up centre bore, puts into the baking oven internal heating curing after filling finishes.
2. the sensor of measurement downhole temperature according to claim 1 is characterized in that: 10 millimeters of sensor protection shell (13) one end stepped diameters, described end external screw thread is M8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201040374U CN201041034Y (en) | 2007-03-30 | 2007-03-30 | Sensor for measuring downhole temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201040374U CN201041034Y (en) | 2007-03-30 | 2007-03-30 | Sensor for measuring downhole temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041034Y true CN201041034Y (en) | 2008-03-26 |
Family
ID=39252740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201040374U Expired - Lifetime CN201041034Y (en) | 2007-03-30 | 2007-03-30 | Sensor for measuring downhole temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041034Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031961A (en) * | 2009-09-30 | 2011-04-27 | 西安威尔罗根能源科技有限公司 | Borehole temperature measuring probe |
| CN102527079A (en) * | 2010-12-27 | 2012-07-04 | 四川恩威制药有限公司 | Protection and installation method of temperature sensor for traditional Chinese medicine extraction tank |
| CN104847337A (en) * | 2015-04-26 | 2015-08-19 | 山西煤炭进出口集团科技发展有限公司 | Well temperature detection tube for geological drilling |
| CN105698951A (en) * | 2014-11-26 | 2016-06-22 | 核工业北京地质研究院 | Well temperature measuring device based on PN junction |
-
2007
- 2007-03-30 CN CNU2007201040374U patent/CN201041034Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031961A (en) * | 2009-09-30 | 2011-04-27 | 西安威尔罗根能源科技有限公司 | Borehole temperature measuring probe |
| CN102527079A (en) * | 2010-12-27 | 2012-07-04 | 四川恩威制药有限公司 | Protection and installation method of temperature sensor for traditional Chinese medicine extraction tank |
| CN105698951A (en) * | 2014-11-26 | 2016-06-22 | 核工业北京地质研究院 | Well temperature measuring device based on PN junction |
| CN105698951B (en) * | 2014-11-26 | 2021-01-05 | 核工业北京地质研究院 | Well temperature measuring device based on PN junction |
| CN104847337A (en) * | 2015-04-26 | 2015-08-19 | 山西煤炭进出口集团科技发展有限公司 | Well temperature detection tube for geological drilling |
| CN104847337B (en) * | 2015-04-26 | 2017-05-31 | 山西煤炭进出口集团科技发展有限公司 | Geological drilling well temperature inserting tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080326 |