CN111119853A - Liquid cooling measurement while drilling system - Google Patents
Liquid cooling measurement while drilling system Download PDFInfo
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- CN111119853A CN111119853A CN201911329324.9A CN201911329324A CN111119853A CN 111119853 A CN111119853 A CN 111119853A CN 201911329324 A CN201911329324 A CN 201911329324A CN 111119853 A CN111119853 A CN 111119853A
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Abstract
The invention discloses a liquid cooling measurement while drilling system, which comprises a communication cable, electronic devices connected with the communication cable, a drill rod, a probe tube and a drilling tool, wherein the drill rod comprises a non-magnetic rod section, the electronic devices are arranged in the probe tube and are jointly installed in the non-magnetic rod section, two tube ends of the probe tube are closed, connecting parts at two ends of the non-magnetic rod section are subjected to sealing treatment, a sealing cavity is formed between the probe tube and the non-magnetic rod section, cooling liquid is filled in the sealing cavity, heat generated by the electronic devices during working is conducted to the wall of the sealing cavity through the cooling liquid, and then the heat is conducted to external slurry to be in contact with the wall of the sealing cavity for heat dissipation. According to the invention, the cooling liquid is filled in the gap between the probe tube and the drill rod, the heat generated by the electronic device can be rapidly conducted to the outer wall of the drill rod and the edge of the drill bit through the cooling liquid, and the heat is dissipated by contacting with the slurry, so that a good heat dissipation effect is achieved, the electronic devices such as an electronic sensor and the like can be protected from being damaged after being used for a long time, and the service life of the measurement while drilling system is prolonged.
Description
Technical Field
The invention relates to a measurement while drilling system, in particular to a liquid cooling measurement while drilling system.
Background
Measurement while drilling is a technique for measuring geological and petrophysical parameters (resistivity, radioactivity, sonic, nuclear magnetic, etc.) of the formation being drilled through during the drilling process. The geosteering drilling technology is a drilling technology which combines a drilling technology, a logging technology and an oil reservoir engineering technology into a whole to form a measuring short joint with near-bit geological parameters (gamma and resistivity), near-bit drilling parameters (well inclination angle) and other auxiliary parameters, and then the measuring short joint is transmitted to MWD through signals and then transmitted to a ground control system. In recent years, measurement while drilling technology is continuously improved, directional measurement while drilling and a logging tool sensor are closer to a drill bit, data can be acquired more quickly and accurately, and accuracy and capability of real-time decision making are improved.
The existing measurement-while-drilling system comprises a communication cable, various electronic sensors connected with the communication cable, a drill rod, a probe tube and a drilling tool, wherein the drilling tool is connected to the lower end of the drill rod, the front end of the drilling tool is a drill bit, the drill rod mainly comprises a water feeder drill rod, an upper non-magnetic drill rod and a lower non-magnetic drill rod which are sequentially connected from top to bottom, the probe tube is installed in the non-magnetic drill rod and is close to the drill bit, and the electronic sensors are arranged in the probe tube so as to avoid the situation that the sensors are close to the drill bit more and are damaged in the.
However, with the development of measurement technology, the test parameters are more accurate, the power of the electronic sensor is gradually increased, and the heat dissipation problem is increasingly prominent. Because the side walls of the probe tube and the drill rod form a two-layer structure, the heat conduction effect of air between the probe tube and the drill rod is poor, the sensor cannot achieve a good cooling effect, and the sensor is easy to damage after being used for a long time due to insufficient cooling, so that the service life of the measurement while drilling system is seriously influenced.
Disclosure of Invention
The invention aims to provide a liquid cooling measurement while drilling system which is simple in structure, low in manufacturing cost, good in heat dissipation effect and capable of prolonging the service life.
The purpose of the invention is realized by the following technical scheme: the utility model provides a liquid cooling measurement while drilling system, includes communication cable, each electron device, drilling rod, probe tube and the drilling tool that links to each other with communication cable, the drilling rod includes no magnetic pole section, electron device sets up in the probe tube and install jointly with it in no magnetic pole section, its characterized in that: the two tube ends of the probe tube are closed, the connecting parts at the two ends of the non-magnetic rod section are subjected to sealing treatment, so that a sealing cavity is formed between the probe tube and the non-magnetic rod section, cooling liquid is filled in the sealing cavity, heat generated by each electronic device during working is conducted to the wall of the sealing cavity through the cooling liquid, and then is conducted to external slurry to be in contact with the cooling liquid for heat dissipation.
According to the invention, the cooling liquid is filled in the gap between the probe tube and the drill rod, heat generated by electronic devices (including the electronic sensor) can be rapidly conducted to the outer wall of the drill rod and the edge of the drill bit through the cooling liquid, and heat dissipation is realized through contact with slurry, so that a good heat dissipation effect is achieved, the electronic devices such as the electronic sensor and the like can be protected from being damaged after long-term use, and the service life of the measurement while drilling system is prolonged.
Preferably, the sealed cavity mainly comprises a gap between the tube wall of the probe tube and the side wall of the non-magnetic rod section and a gap between two ends of the probe tube and two ends of the non-magnetic rod section.
In order to further improve the heat dissipation effect, as an improvement of the invention, the cooling liquid in the sealed cavity is an external cooling liquid, the probe tube is filled with an insulating cooling liquid which is an internal cooling liquid, the electronic device is immersed in the internal cooling liquid, heat generated by the electronic device is conducted to the tube wall of the probe tube through the internal cooling liquid, then conducted to the wall of the sealed cavity through the external cooling liquid, and then conducted to external slurry to contact with the wall of the sealed cavity for heat dissipation.
As an embodiment of the present invention, the external cooling liquid is a high boiling point cooling liquid, and the high boiling point cooling liquid fills the entire sealed cavity. The high boiling point cooling liquid has a boiling point higher than 40 deg.C, and can be selected from silicone oil or mineral oil.
In another embodiment of the present invention, the external cooling fluid is a low boiling point cooling fluid, the low boiling point cooling fluid is filled in the lower space of the sealed cavity, heat generated by the electronic device during operation is transferred to the low boiling point cooling fluid, the cooling fluid undergoes a phase change to generate cooling fluid vapor, the cooling fluid vapor is upwards transferred and contacts with the side wall of the drill rod, and heat dissipation is realized by contact with external slurry and phase change of the cooling fluid. The low boiling point cooling liquid has a boiling point lower than 40 deg.C, and the low boiling point cooling liquid may be Freon series cooling liquid. Under the same weight condition, the heat dissipation effect of the embodiment is better than that of the cooling liquid with high boiling point.
On the basis, the invention can be further improved, the inner wall of the non-magnetic rod section is provided with the enhanced heat dissipation fins, the enhanced heat dissipation fins are higher than the liquid level of the cooling liquid in the sealing cavity, the enhanced heat dissipation fins can enhance the condensation heat dissipation of the cooling liquid steam, and the heat exchange effect can be further improved.
As a recommended implementation mode of the invention, the probe tube is mainly formed by hermetically connecting a plurality of measuring short sections provided with various electronic devices.
Compared with the prior art, the invention has the following remarkable effects:
⑴ the invention fills cooling liquid in the gap between the probe and the drill rod, the heat generated by the electronic device (including the electronic sensor) can be quickly conducted to the outer wall of the drill rod and the edge of the drill bit through the cooling liquid, and the heat is dissipated through the contact with the mud, thus achieving good heat dissipation effect, protecting the electronic devices such as the electronic sensor and the like from being damaged after long-term use, and prolonging the service life of the measurement while drilling system.
⑵ the probe tube is filled with insulating cooling liquid, and the electronic device is immersed in the cooling liquid, so as to further improve the heat dissipation effect.
⑶ the external cooling liquid of the invention is low boiling point cooling liquid, and the enhanced heat dissipation fins can enhance the condensation heat dissipation of the cooling liquid steam, and can further improve the heat exchange effect.
⑷ the probe tube of the invention is mainly formed by sealing and connecting a plurality of measuring short sections, not only is the installation convenient, but also the insulating cooling liquid is filled in each measuring short section, thus further improving the heat dissipation effect.
⑸ the invention has simple structure and low manufacturing cost, and is suitable for wide application.
Drawings
The invention is described in further detail below with reference to the figures and the specific embodiments.
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of a non-magnetic rod section in example 1 of the present invention;
FIG. 3 is a schematic structural diagram of one of the measuring nipples in embodiment 2 of the present invention;
fig. 4 is a schematic structural diagram of embodiment 3 of the present invention.
Detailed Description
Example 1
As shown in fig. 1 and 2, the liquid cooling measurement while drilling system of the present invention includes a communication cable 1, and each electronic device connected to the communication cable 1, a drill rod, a probe 2 and a drilling tool 3, wherein the front end of the drilling tool 3 is a drill bit, in this embodiment, the drill rod includes a water feeder rod section 4 and a non-magnetic rod section 5, the water feeder rod section 4, the non-magnetic rod section 5 and the drilling tool 3 are sequentially connected from top to bottom, each electronic device is disposed in the probe 2 and installed together with the probe in the non-magnetic rod section 5, and the lower end of the probe 2 is close to the drilling tool and connected with the same to be fixed in the non-magnetic rod section 5. Two pipe ends of the probe pipe 2 are sealed, and the connecting part of the non-magnetic rod section 5 and the water feeder rod section 4 and the connecting part of the non-magnetic rod section 5 and the drilling tool 3 are both subjected to sealing treatment, specifically: the lower end of the water feeder rod section 4 is in sealing connection with the upper end of the non-magnetic rod section 5 through a locking nut 17, the lower end of the non-magnetic rod section 5 is in sealing connection with the drilling tool 3 through a fixing sleeve 18, the locking nut 17 and the fixing sleeve 18 are both existing parts, so that a sealing cavity 6 is formed between the probe tube 2 and the non-magnetic rod section 5, the sealing cavity 6 mainly comprises a gap between the tube wall of the probe tube 2 and the side wall of the non-magnetic rod section 5 and a gap between the two ends of the probe tube 2 and the two ends of the non-magnetic rod section 5, cooling liquid is filled in the sealing cavity 6, in the embodiment, the cooling liquid is high-boiling-point cooling liquid 7, the high-boiling-point cooling liquid 7 can be cooling liquid with the boiling point temperature higher than 40 degrees such as silicone oil or mineral oil, and the high-boiling-point cooling liquid 7.
In this embodiment, the probe 2 is mainly formed by hermetically connecting a plurality of measuring short sections provided with various electronic devices, and each measuring short section is a control assembly 8, a configuration assembly 9, an electronic probe 10, a gamma probe 11 and a battery short section 14 which are sequentially connected from top to bottom. The electronic sensors with large heat generation are positioned in the electronic probe tube 10 and the gamma probe tube 11. When the drill bit is in deep operation, the electronic sensor inside the probe starts to work to feed back data, and heat generated when the electronic sensor and other electronic devices work is conducted to the chamber wall (including the side wall of the drill rod and the edge of the drill bit) of the sealed chamber 6 through the high-boiling-point cooling liquid and then conducted to the outside of the drill rod to be in contact with external slurry for heat dissipation.
Example 2
This embodiment is different from embodiment 1 in that: each measuring short joint is filled with insulating cooling liquid which is internal cooling liquid 13, electronic devices in the measuring short joint are immersed in the internal cooling liquid 13, and one measuring short joint, namely an electronic probe 10, is shown in fig. 3, and an electronic sensor 12 is arranged in the electronic probe. The high boiling point cooling liquid 7 between the probe and the non-magnetic rod section 5 is external cooling liquid, heat generated by the electronic sensor 12 and other electronic devices is conducted to the wall of the electronic probe 10 through the internal cooling liquid 13, then conducted to the wall of the sealed cavity 6 through the external cooling liquid, and then conducted to external slurry to contact with the external slurry for heat dissipation, so that compared with the embodiment 1, the heat dissipation effect can be further improved.
Example 3
As shown in fig. 4, the present embodiment is different from embodiment 2 in that: the external cooling liquid is low boiling point cooling liquid 15, the low boiling point cooling liquid 15 is Freon series cooling liquid, the low boiling point cooling liquid 15 is filled in the lower space of the sealed cavity 6, heat generated when an electronic device works is conducted to the low boiling point cooling liquid 15, the low boiling point cooling liquid 15 is subjected to phase change to generate cooling liquid steam, the cooling liquid steam is conducted to the upper space of the sealed cavity 6 and is in contact with the side wall of the drill rod, and heat dissipation is achieved through contact with external slurry and phase change of the cooling liquid. The inner wall of the upper part of the non-magnetic rod section 5 is also provided with reinforced radiating fins 16, the reinforced radiating fins 16 are higher than the liquid level of external cooling liquid, the reinforced radiating fins can reinforce condensation and radiation of cooling liquid steam, and the heat exchange effect can be further improved.
The present invention is not limited to the above embodiments, and various modifications, substitutions and alterations can be made without departing from the basic technical concept of the present invention as described above.
Claims (9)
1. The utility model provides a liquid cooling measurement while drilling system, includes communication cable, each electron device, drilling rod, probe tube and the drilling tool that links to each other with communication cable, the drilling rod includes no magnetic pole section, electron device sets up in the probe tube and install jointly with it in no magnetic pole section, its characterized in that: the two tube ends of the probe tube are closed, the connecting parts at the two ends of the non-magnetic rod section are subjected to sealing treatment, so that a sealing cavity is formed between the probe tube and the non-magnetic rod section, cooling liquid is filled in the sealing cavity, heat generated by each electronic device during working is conducted to the wall of the sealing cavity through the cooling liquid, and then is conducted to external slurry to be in contact with the cooling liquid for heat dissipation.
2. The liquid-cooled measurement-while-drilling system of claim 1, wherein: the sealed cavity mainly comprises a gap between the pipe wall of the probe pipe and the side wall of the non-magnetic rod section and a gap between the two ends of the probe pipe and the two ends of the non-magnetic rod section.
3. The liquid-cooled measurement-while-drilling system of claim 2, wherein: the probe tube is mainly formed by hermetically connecting a plurality of measuring short sections provided with electronic devices.
4. The liquid-cooled measurement-while-drilling system of claim 3, wherein: the cooling liquid in the sealed cavity is external cooling liquid, the probe tube is filled with insulating cooling liquid which is internal cooling liquid, the electronic device is immersed in the internal cooling liquid, heat generated by the electronic device is conducted to the tube wall of the probe tube through the internal cooling liquid, then conducted to the wall of the sealed cavity through the external cooling liquid, and then conducted to external slurry to be in contact with the wall of the sealed cavity for heat dissipation.
5. The liquid-cooled measurement-while-drilling system according to any one of claims 1 to 4, wherein: the external cooling liquid is a high boiling point cooling liquid, and the high boiling point cooling liquid is filled in the whole sealing cavity.
6. The liquid-cooled measurement-while-drilling system according to any one of claims 1 to 4, wherein: the external cooling liquid is a low boiling point cooling liquid, and the low boiling point cooling liquid is filled in the lower space of the sealed cavity.
7. The liquid-cooled measurement-while-drilling system of claim 6, wherein: and the inner wall of the non-magnetic rod section is provided with reinforced radiating fins which are higher than the liquid level of the cooling liquid in the sealing cavity.
8. The liquid-cooled measurement-while-drilling system of claim 5, wherein: the high boiling point cooling liquid adopts silicone oil or mineral oil.
9. The liquid-cooled measurement-while-drilling system of claim 6 or 7, wherein: the low boiling point cooling liquid is a freon series cooling liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911329324.9A CN111119853A (en) | 2019-12-20 | 2019-12-20 | Liquid cooling measurement while drilling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911329324.9A CN111119853A (en) | 2019-12-20 | 2019-12-20 | Liquid cooling measurement while drilling system |
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| Publication Number | Publication Date |
|---|---|
| CN111119853A true CN111119853A (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911329324.9A Pending CN111119853A (en) | 2019-12-20 | 2019-12-20 | Liquid cooling measurement while drilling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458292A (en) * | 2022-01-25 | 2022-05-10 | 海南大学 | High-temperature deep well logging-while-drilling drill collar containing phase-change material and using method thereof |
-
2019
- 2019-12-20 CN CN201911329324.9A patent/CN111119853A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458292A (en) * | 2022-01-25 | 2022-05-10 | 海南大学 | High-temperature deep well logging-while-drilling drill collar containing phase-change material and using method thereof |
| CN114458292B (en) * | 2022-01-25 | 2023-05-02 | 海南大学 | High-temperature deep well logging-while-drilling drill collar containing phase-change material and use method thereof |
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