CN212844062U

CN212844062U - Geothermal well temperature monitoring device

Info

Publication number: CN212844062U
Application number: CN202021226506.1U
Authority: CN
Inventors: 王书正
Original assignee: Shandong Shungan Photoelectric Technology Co ltd
Current assignee: Shandong Shungan Photoelectric Technology Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2021-03-30
Anticipated expiration: 2030-06-29

Abstract

The utility model relates to the technical field of geothermal wells, in particular to a geothermal well temperature monitoring device, which comprises a geothermal well body, a temperature measuring optical fiber which is arranged in the geothermal well body and is formed by a plurality of sections of optical fibers through series fusion, an optical fiber temperature measuring host and a plurality of optical fiber splice boxes for protecting fusion points on the temperature measuring optical fiber; the optical fiber splicing box is fixedly provided with an ear seat, the ear seats of the upper and lower adjacent optical fiber splicing boxes are respectively bound with a first rigid rope, the ear seat of the optical fiber splicing box positioned at the top is bound with a second rigid rope, the ground of the geothermal well body is fixedly provided with a vertical frame, and the vertical frame and the second rigid rope are bound. The utility model discloses an optical fiber splice box protects the temperature sensing optic fibre that the multistage series connection butt fusion formed, reduce cost to share the load that optical fiber splice box led to the fact temperature measurement optic fibre, ensure the structural strength of temperature measurement optic fibre through first rigidity rope and second rigidity rope.

Description

Geothermal well temperature monitoring device

Technical Field

The utility model relates to a geothermal well technical field specifically is a geothermal well temperature monitoring device.

Background

A geothermal well refers to a method and a device for generating electricity by using geothermal energy with a well depth of about 3500 meters or hot spring water with a water temperature of more than 30 ℃.

At present, devices for monitoring the temperature of the geothermal well mainly comprise a thermocouple, a thermistor, a resistance temperature detector, an IC temperature sensor and the like, and the devices are high in precision and good in sensitivity in a measurement range and are always used as important means for temperature test research. However, since it can only perform point-type temperature measurement, there is a limitation in monitoring the temperature of the geothermal well. In order to better master geothermal well geothermal distribution conditions, full-well distributed temperature monitoring needs to be realized.

The utility model patent with publication number CN206174954U discloses a distributed temperature test system for hot dry rock deep well, it includes distributed optic fibre temperature acquisition device, device and temperature measurement optical cable of going into the well. The utility model discloses an in, the distributed temperature measurement of hot dry rock deep well is realized as the temperature sensing element and the data transmission passageway of system to the temperature measurement optical cable, but because the geothermal well degree of depth reaches about 3500 meters, the used optic fibre of measurement temperature needs 3500 meters at least, for reducing the optic fibre cost, generally adopts the mode of series connection butt fusion to make up into the optic fibre of required length with the less optic fibre of length. Therefore, the optical fiber splice requires an optical fiber splice closure for insulation protection, but the optical fiber splice closure inevitably increases the optical fiber load, resulting in easy breakage of the optical fiber.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a geothermal well temperature monitoring device, which can reduce the cost of temperature measurement optical fibers and improve the load capacity of the temperature measurement optical fibers; the problem of the temperature measurement of original temperature measurement optic fibre exist the cost high, easy fracture is solved.

(II) technical scheme

For the purpose that can reduce temperature measurement optic fibre cost, improve temperature measurement optic fibre load capacity above-mentioned, the utility model provides a following technical scheme: a geothermal well temperature monitoring device comprises a geothermal well body, a temperature measuring optical fiber which is arranged in the geothermal well body and is formed by connecting a plurality of sections of optical fibers in series and welding, an optical fiber temperature measuring host which is used for providing a light source for the temperature measuring optical fiber and receiving an optical signal in the temperature measuring optical fiber, and a plurality of optical fiber splice boxes which are used for protecting welding points on the temperature measuring optical fiber;

the optical fiber splicing box is fixedly provided with an ear seat, the ear seats of the upper and lower adjacent optical fiber splicing boxes are respectively bound with a first rigid rope, the ear seat of the optical fiber splicing box positioned at the top is bound with a second rigid rope, the ground of the geothermal well body is fixedly provided with a vertical frame, and the vertical frame is bound with the second rigid rope.

Optionally, a third rigid rope is bound to an ear seat on the lowermost optical fiber splice closure, a first support is bound to the third rigid rope, a cylindrical counterweight is fixedly arranged on the first support, and a centralizer matched with the geothermal well body is fixedly arranged on the cylindrical counterweight.

Optionally, a winch is fixedly arranged on the ground of the geothermal well body, a fourth rigid rope is wound on the winch, a second support is bound after the fourth rigid rope extends into the geothermal well body, and a cylindrical counterweight is fixedly arranged on the second support.

Optionally, the optical fiber splice closure comprises two symmetrical half-closure bodies fixedly connected through a bolt connection pair, a sealing ring and a sealing strip are embedded in each half-closure body, and the sealing ring wraps the temperature measuring optical fiber; the sealing ring is provided with two which are vertically symmetrical, the sealing strip is provided with two which are horizontally symmetrical by taking the sealing ring as a longitudinal central shaft, and the two sealing rings and the two sealing strips enclose a rectangular sealing cavity.

Optionally, the vertical section of the sealing ring is i-shaped; the positive vertical section of the sealing strip is C-shaped.

(III) advantageous effects

Compared with the prior art, the utility model provides a geothermal well temperature monitoring device possesses following beneficial effect:

1. the utility model adopts the optical fiber splice closure to protect the temperature sensing optical fiber formed by the multi-section series connection fusion, reduces the cost, shares the load of the optical fiber splice closure on the temperature sensing optical fiber through the first rigid rope and the second rigid rope, and ensures the structural strength of the temperature sensing optical fiber;

2. the utility model discloses a hoist engine pulling cylindricality counter weight makes temperature measurement optic fibre slowly vertical sinking along the geothermal well body, guarantees that temperature measurement optic fibre is vertical straight line and distributes in the geothermal well body to can realize the central department that temperature measurement optic fibre is located the geothermal well body through the centralizer, improve the degree of accuracy of temperature measurement optic fibre measurement geothermal well body intermediate temperature.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

fig. 2 is a schematic structural view of the optical fiber splice closure, the cylindrical weight and the centralizer of the present invention;

fig. 3 is the structure schematic diagram of the middle half box body, the sealing ring and the sealing strip of the utility model.

In the figure: the device comprises a geothermal well body 1, a temperature measuring optical fiber 2, an optical fiber temperature measuring host 3, an optical fiber splice closure 4, an ear seat 5, a first rigid rope 6, a second rigid rope 7, a vertical frame 8, a third rigid rope 9, a first support 10, a cylindrical counterweight 11, a centralizer 12, a winch 13, a fourth rigid rope 14, a second support 15, a half box 16, a sealing ring 17 and a sealing strip 18.

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.

Example (b): referring to fig. 1, the utility model provides a geothermal well temperature monitoring device, including geothermal well body 1, arrange in geothermal well body 1 and adopt the temperature measurement optic fibre 2 that the butt fusion formed of establishing ties by a plurality of sections optic fibre in for provide the light source and receive the optic fibre temperature measurement host computer 3 of optical signal in temperature measurement optic fibre 2 to temperature measurement optic fibre 2, and a plurality of optic fibre splice closure 4 that is used for protecting splice point on the temperature measurement optic fibre 2.

The temperature measurement principle of the temperature measurement optical fiber 2 is as follows: the optical fiber temperature measurement host 3 emits light to the temperature measurement optical fiber 2, and the temperature effect of backward Raman scattering spectrum is generated in the transmission process of the light in the temperature measurement optical fiber 2. The optical fiber temperature measurement host 3 analyzes the Raman scattering spectrum to obtain the temperature distribution situation on the temperature measurement optical fiber 2.

The optical fiber splice closure 4 comprises two symmetrical half-closure bodies 16 fixedly connected through a bolt connecting pair, referring to fig. 3, a sealing ring 17 and a sealing strip 18 are embedded in the half-closure body 16, the sealing ring 17 is used for coating the temperature measuring optical fiber 2, and the vertical section of the sealing ring 17 is in an i shape; the sealing tape 18 has a C-shaped vertical cross section. The two sealing rings 17 are vertically symmetrical, and the two sealing strips 18 are horizontally symmetrical with the sealing rings 17 as a longitudinal central shaft. The two sealing rings 17 and the two sealing strips 18 enclose a rectangular sealing cavity to isolate a gap between the two half box bodies 16, so that the sealing performance of a welding point on the temperature measuring optical fiber 2 is improved.

The optical fiber splice closure 4 is fixedly provided with the lug seats 5 which are integrally formed with the half-closure body 16, the lug seats 5 of the optical fiber splice closure 4 which are adjacent from top to bottom are respectively bound with the first rigid ropes 6, the lug seat 5 of the optical fiber splice closure 4 which is positioned at the top is bound with the second rigid rope 7, the ground of the geothermal well body 1 is fixedly provided with the vertical frame 8, and the vertical frame 8 is bound with the second rigid rope 7. The adjacent optical fiber splicing boxes 4 are connected in a line mode through the first rigid rope 6, the temperature measurement optical fibers 2 between the adjacent optical fiber splicing boxes 4 are ensured to be in a vertical state, the first rigid rope 6 and the second rigid rope 7 are used for sharing the load of the optical fiber splicing boxes 4 on the temperature measurement optical fibers 2, and the structural strength of the temperature measurement optical fibers 2 is ensured.

Referring to fig. 1 and 2, a third rigid rope 9 is bound to the ear seat 5 on the lowermost optical fiber splice closure 4, a first bracket 10 is bound to the third rigid rope 9, and two first brackets 10 are provided. The bottom of the first support 10 is welded with a cylindrical counterweight 11, the cylindrical counterweight 11 is welded with a centralizer 12 matched with the geothermal well body 1, the temperature measuring optical fibers 2 vertically sink along the geothermal well body 1 through the cylindrical counterweight 11, the temperature measuring optical fibers 2 are guaranteed to be vertically linearly distributed in the geothermal well body 1, the cylindrical counterweight 11 is located at the center of the geothermal well body 1 through the centralizer 12, only the centers of the two first supports 10 and the centers of the cylindrical counterweight 11 are required to be set, the centers of the temperature measuring optical fibers 2 are located on the same vertical line, the center of the temperature measuring optical fibers 2 located at the geothermal well body 1 can be achieved, and the accuracy of measuring the temperature in the geothermal well body 1 through the temperature measuring optical fibers 2 is improved.

The ground of geothermal well body 1 has set firmly hoist engine 13, and the last coiling of hoist engine 13 has fourth rigid rope 14, and fourth rigid rope 14 stretches into in geothermal well body 1 back ligature has second support 15, has set firmly cylindricality counter weight 11 on the second support 15, has fourth rigid rope 14 restraint on the cylindricality counter weight 11, realizes slowly placing cylindricality counter weight 11 the time, avoids cylindricality counter weight 11 to break first rigid rope 6, or second rigid rope 7 or third rigid rope 9.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a geothermal well temperature monitoring device which characterized in that: the device comprises a geothermal well body (1), a temperature measuring optical fiber (2) which is arranged in the geothermal well body (1) and is formed by connecting a plurality of sections of optical fibers in series and welding, an optical fiber temperature measuring host (3) which is used for providing a light source for the temperature measuring optical fiber (2) and receiving an optical signal in the temperature measuring optical fiber (2), and a plurality of optical fiber splice boxes (4) which are used for protecting welding points on the temperature measuring optical fiber (2);

the optical fiber splice box is characterized in that an ear seat (5) is fixedly arranged on the optical fiber splice box (4), a first rigid rope (6) is bound on the ear seat (5) of the upper and lower adjacent optical fiber splice boxes (4) respectively, a second rigid rope (7) is bound on the ear seat (5) of the optical fiber splice box (4) positioned on the top, a vertical frame (8) is fixedly arranged on the ground of the geothermal well body (1), and the vertical frame (8) is bound with the second rigid rope (7) mutually.

2. A geothermal well temperature monitoring apparatus according to claim 1, wherein: the third rigid rope (9) is bound on an ear seat (5) on the optical fiber splice box (4) positioned at the lowest part, a first support (10) is bound on the third rigid rope (9), a cylindrical counter weight (11) is fixedly arranged on the first support (10), and a centralizer (12) matched with the geothermal well body (1) is fixedly arranged on the cylindrical counter weight (11).

3. A geothermal well temperature monitoring apparatus according to claim 2, wherein: the ground of the geothermal well body (1) is fixedly provided with a winch (13), a fourth rigid rope (14) is wound on the winch (13), the fourth rigid rope (14) stretches into the geothermal well body (1) and then is bound with a second support (15), and the second support (15) is fixedly provided with a cylindrical counterweight (11).

4. A geothermal well temperature monitoring apparatus according to claim 1, wherein: the optical fiber splice closure (4) is formed by fixedly connecting two symmetrical half box bodies (16) through a bolt connecting pair, a sealing ring (17) and a sealing strip (18) are embedded in each half box body (16), and the sealing ring (17) coats the temperature measuring optical fiber (2); the sealing ring (17) is provided with two sealing rings which are symmetrical up and down, the sealing strips (18) are provided with two sealing rings which are symmetrical left and right by taking the sealing rings (17) as a longitudinal central shaft, and the two sealing rings (17) and the two sealing strips (18) enclose a rectangular sealing cavity.

5. A geothermal well temperature monitoring apparatus according to claim 4, wherein: the vertical section of the sealing ring (17) is I-shaped; the positive vertical section of the sealing strip (18) is C-shaped.