CN205542097U - Oil well downhole temperature measuring cable - Google Patents
Oil well downhole temperature measuring cable Download PDFInfo
- Publication number
- CN205542097U CN205542097U CN201620094046.9U CN201620094046U CN205542097U CN 205542097 U CN205542097 U CN 205542097U CN 201620094046 U CN201620094046 U CN 201620094046U CN 205542097 U CN205542097 U CN 205542097U
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- CN
- China
- Prior art keywords
- stainless steel
- steel pipe
- temperature measuring
- oil well
- thermocouple wire
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- 239000003129 oil well Substances 0.000 title claims abstract description 25
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 61
- 239000010935 stainless steel Substances 0.000 claims abstract description 61
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 13
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 11
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 description 10
- 230000007774 longterm Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to an oil well temperature measurement cable in pit, include: the electric coupler comprises a thermocouple wire, a first stainless steel pipe, a magnesium oxide powder filler, a compensation lead and an insulating layer; the opening of the first stainless steel pipe is sealed, one end of the thermocouple wire is arranged in the first stainless steel pipe, and the thermocouple wire penetrates through the sealed position of the first stainless steel pipe; at the sealing position, the other end of the thermocouple wire is connected with the compensation lead; the compensation conducting wire is arranged in the insulating layer; filling the magnesium oxide powder filler between the thermocouple wire and the first stainless steel pipe in the first stainless steel pipe; and forming a single-point oil well downhole temperature measuring cable. In addition, the stainless steel pipe also comprises a second stainless steel pipe; the opening of the second stainless steel pipe is sealed, one ends of at least two groups of single-point oil well downhole temperature measuring cables are arranged in the second stainless steel pipe, and the other ends of the single-point oil well downhole temperature measuring cables penetrate through the sealed position of the second stainless steel pipe; and forming a multi-point oil well downhole temperature measuring cable.
Description
Technical Field
The utility model relates to an oil production and test technical field, in particular to temperature measurement cable in pit of oil well.
Background
Fire flooding is a mode for exploiting thick oil in an oil field, measures are taken to ignite an oil layer so as to achieve the purpose of driving the thick oil, so that the temperature of part of stratum of a fire flooding block can reach six to seven hundred ℃, and the position of a fire line even exceeds thousands of ℃, and in the implementation process of fire flooding, the monitoring of the temperature of the stratum is a necessary means for controlling the direction and the speed of the fire flooding and the like by taking measures. At present, the maximum temperature resistance of a cable capable of monitoring the temperature under the well of an oil field can reach 350 ℃, which can not meet the requirement of temperature monitoring of a fireflood block high-temperature well, and moreover, the temperature monitoring of thousands of ℃ under the well is difficult to realize in consideration of the prior art and cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, provide an oil well temperature measurement cable in pit, can realize the long-term monitoring of fireflood high temperature well temperature in pit outside the live wire.
In order to achieve the above object, the utility model provides an oil well temperature measurement cable in pit, include: the electric coupler comprises a thermocouple wire, a first stainless steel pipe, a magnesium oxide powder filler, a compensation lead and an insulating layer; wherein,
the opening of the first stainless steel pipe is sealed, one end of the thermocouple wire is arranged in the first stainless steel pipe, and the thermocouple wire penetrates through the sealed position of the first stainless steel pipe;
at the sealing position, the other end of the thermocouple wire is connected with the compensation lead;
the compensation conducting wire is arranged in the insulating layer;
filling the magnesium oxide powder filler between the thermocouple wire and the first stainless steel pipe in the first stainless steel pipe; and forming a single-point oil well downhole temperature measuring cable.
Preferably, a second stainless steel tube is also included; wherein,
the opening of the second stainless steel pipe is sealed, one ends of at least two groups of single-point oil well downhole temperature measuring cables are arranged in the second stainless steel pipe, and the other ends of the single-point oil well downhole temperature measuring cables penetrate through the sealed position of the second stainless steel pipe; and forming a multi-point oil well downhole temperature measuring cable.
Preferably, the number of the electric coupling wires is two.
Preferably, the diameter of the first stainless steel tube is larger than the diameter of the second stainless steel tube.
The technical scheme has the following beneficial effects: the technical scheme is that the oil well downhole temperature measuring cable capable of resisting the high temperature of 700 ℃ can realize long-term monitoring of the downhole temperature of the fireflood high-temperature well except a live wire.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the utility model provides an oil well temperature measurement cable structure sketch map in pit.
The attached drawings are as follows:
1. a second stainless steel pipe 2, a first stainless steel pipe 3, a magnesia powder filler 4 and a thermocouple wire
5. Sealing 6, compensating lead 7, insulating layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The working principle of the technical scheme is as follows: the temperature measuring cable is mainly used for long-term monitoring of downhole multipoint temperatures of high-temperature wells in oil fields, is a main component of a long-term monitoring system of the oil wells in the oil fields, can be suitable for temperature measuring cables of the high-temperature wells below 350 ℃, has a mature technology at present, but the temperature of part of strata developed by fireflooding of thick oil in the oil fields exceeds 350 ℃, and the technical scheme provides the temperature measuring cable capable of resisting the high temperature of 700 ℃. Structurally, thermocouple temperature measurement is adopted, a pair of thermocouple wires penetrates through a small-diameter stainless steel pipe, a dry magnesia powder filler is filled between the thermocouple wires for insulation, a single-point temperature measurement cable is formed, and a plurality of single-point temperature measurement cables penetrate through a large-diameter stainless steel pipe according to the requirement of the number of temperature measurement points, so that a multipoint temperature measurement cable is formed.
In the manufacturing process, a thermocouple penetrates through a hollow stainless steel column, dry magnesia powder is filled between the hollow stainless steel column and the hollow stainless steel column for insulation, the thermocouple and the stainless steel column are simultaneously drawn to a required length to form a thermocouple wire and a small-diameter stainless steel tube, an opening of the small-diameter stainless steel tube is sealed by glue, the thermocouple wire is led out at the sealed position to form a single-point temperature measuring cable, and then a plurality of groups of single-point temperature measuring cables are drawn into the large-diameter stainless steel tube according to the temperature measuring point number and the temperature measuring position requirement to form the multi-point temperature measuring cable resistant to the temperature of 700.
The embodiment is described by taking a three-point temperature measuring cable as an example, and in practice, at least two sets of single-point temperature measuring cables are provided.
The temperature measuring cable is manufactured by two steps:
firstly, a pair of thermocouples with the top ends connected together penetrate through a hollow stainless steel column, a dry magnesium oxide powder filler 3 is filled between the thermocouples and the hollow stainless steel column for insulation, then the thermocouples and the hollow stainless steel column are simultaneously drawn to form a thermocouple wire 4 and a first stainless steel tube 2 respectively, in the embodiment, the stainless steel tube with a small diameter is called the first stainless steel tube 2, the magnesium oxide powder filler 3 is continuously filled in the drawing process and is drawn to a required length, the magnesium oxide powder filler 3 is filled between the first stainless steel tube 2 and the thermocouple wire 4 and between the couple wires 4 and cannot be contacted, then the opening of the first stainless steel tube 2 is sealed by a sealant, the thermocouple wire 4 is led out from a sealing part 5, the led thermocouple wire 4 is connected with a compensating lead wire 6, an insulating layer 7 is arranged outside the compensating lead wire 6, and a single-point temperature measuring cable is manufactured. In the technical scheme, the compensation conducting wire and the thermocouple wire form a series structure, and the compensation conducting wire is used for replacing the thermocouple wire outside the second stainless steel pipe 1, so that the insulating layer is more conveniently prepared, and the preparation cost is reduced.
Secondly, pulling a plurality of groups of single-point temperature measuring cables into the large-diameter stainless steel pipe according to the requirement of the number of temperature measuring points and the temperature measuring position, in this embodiment, the small-diameter stainless steel pipe is called as a second stainless steel pipe 1, and here, three-point temperature measurement is taken as an example, as shown in fig. 1. And pulling the three manufactured single-point temperature measuring cables into the second stainless steel tube 1 according to different positions, sealing the top end of the second stainless steel tube, and leading out the three single-point temperature measuring cables from the other end of the second stainless steel tube to form a three-point temperature measuring cable.
Aiming at the situation that the local underground temperature in the development mode of thermal recovery and fireflooding of the thick oil in the oil field exceeds 350 ℃, the underground temperature measurement cable of the oil well shown in the figure 1 can be used for carrying out underground multipoint temperature monitoring on the part of the oil well, and the production requirement of the oil field is met. Under the condition that the underground temperature is not more than 700 ℃, the long-term safe implementation of the underground multipoint temperature monitoring of the oil well is ensured.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. An oil well downhole temperature measurement cable, comprising: the electric coupler comprises a thermocouple wire, a first stainless steel pipe, a magnesium oxide powder filler, a compensation lead and an insulating layer; wherein,
the opening of the first stainless steel pipe is sealed, one end of the thermocouple wire is arranged in the first stainless steel pipe, and the thermocouple wire penetrates through the sealed position of the first stainless steel pipe;
at the sealing position, the other end of the thermocouple wire is connected with the compensation lead;
the compensation conducting wire is arranged in the insulating layer;
filling the magnesium oxide powder filler between the thermocouple wire and the first stainless steel pipe in the first stainless steel pipe; and forming a single-point oil well downhole temperature measuring cable.
2. The downhole thermometric cable of claim 1, further comprising a second stainless steel tube; wherein,
the opening of the second stainless steel pipe is sealed, one ends of at least two groups of single-point oil well downhole temperature measuring cables are arranged in the second stainless steel pipe, and the other ends of the single-point oil well downhole temperature measuring cables penetrate through the sealed position of the second stainless steel pipe; and forming a multi-point oil well downhole temperature measuring cable.
3. The downhole temperature measuring cable of claim 1 or 2, wherein there are two thermocouple wires.
4. The downhole thermometric cable of claim 2, wherein said first stainless steel tube has a diameter greater than a diameter of said second stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620094046.9U CN205542097U (en) | 2016-01-29 | 2016-01-29 | Oil well downhole temperature measuring cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620094046.9U CN205542097U (en) | 2016-01-29 | 2016-01-29 | Oil well downhole temperature measuring cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205542097U true CN205542097U (en) | 2016-08-31 |
Family
ID=56773427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620094046.9U Active CN205542097U (en) | 2016-01-29 | 2016-01-29 | Oil well downhole temperature measuring cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205542097U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529088A (en) * | 2016-01-29 | 2016-04-27 | 中国石油天然气股份有限公司 | Oil well downhole temperature measuring cable |
| CN109341885A (en) * | 2018-11-08 | 2019-02-15 | 鑫国集团有限公司 | A kind of two point entity armoured thermocouple of overlength |
-
2016
- 2016-01-29 CN CN201620094046.9U patent/CN205542097U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529088A (en) * | 2016-01-29 | 2016-04-27 | 中国石油天然气股份有限公司 | Oil well downhole temperature measuring cable |
| CN109341885A (en) * | 2018-11-08 | 2019-02-15 | 鑫国集团有限公司 | A kind of two point entity armoured thermocouple of overlength |
| CN109341885B (en) * | 2018-11-08 | 2024-05-21 | 鑫国集团有限公司 | Ultra-long two-point entity armoured thermocouple |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |