CN219197315U - Photoelectric composite cable headstall and DTS logging device - Google Patents

Abstract

The utility model discloses a photoelectric composite cable headstall and a DTS logging device, which solve the technical problems of poor use safety, poor use stability, low logging time and poor measurement accuracy. The device comprises a fishing cap, a middle connecting rod, a cable core, an optical fiber core and a first sealing piece, wherein the fishing cap, the middle connecting rod and the connecting rod are sequentially connected from top to bottom, the middle connecting rod is in threaded connection with the connecting rod, and the first sealing piece is used for sealing the end part of the optical fiber core; the middle connecting rod is detachably inserted with a limiting pin, the connecting rod is provided with a limiting groove, and after the middle connecting rod is screwed with the connecting rod, the limiting pin can be clamped into the limiting groove and limit the middle connecting rod and the connecting rod to rotate towards the unscrewing direction. The utility model can reduce the risk of thread release between the middle connecting rod and the connecting rod, thereby improving the use safety and the use stability, and also improving the communication rate and the signal transmission quality, and further improving the logging time efficiency and the measurement accuracy.

Description

Photoelectric composite cable headstall and DTS logging device

Technical Field

The utility model belongs to the technical field of logging devices, and particularly relates to a photoelectric composite cable headstall and a DTS logging device.

Background

The headstall is a tool for connecting a logging cable and a logging instrument, belongs to one of connecting pieces, and is an important component of a logging device. The DTS logging device is a distributed optical fiber temperature measurement system, also called optical fiber temperature measurement, and monitors the borehole temperature according to the optical time domain reflection principle and the Raman scattering effect.

The headstall in the related art generally comprises a cable, a fishing cap, a middle connecting rod and a connecting rod which are sequentially arranged, wherein the fishing cap is fixedly connected with the middle connecting rod, the middle connecting rod is connected with the connecting rod through threads, and the cable sequentially penetrates through the fishing cap and the middle connecting rod and is fixedly connected with a fixer on the connecting rod.

However, because the middle connecting rod and the connecting rod are connected with the headstall through threads, the phenomenon that threads are loosened and loosened easily occurs due to the existence of factors such as vibration and collision in the long-time use process, so that serious potential safety hazards exist. Moreover, the headstall in the related art is only used for cables, and the problems of low communication rate and poor signal transmission quality exist in electric signal transmission, so that logging timeliness and measurement accuracy are affected.

Therefore, the headstall in the related art has the risk of thread unscrewing and loosening, so that the headstall and a measuring device are influenced in use safety and use stability, the problems of low communication rate and poor signal transmission quality are solved, logging time efficiency and measuring accuracy are influenced, and improvement is needed.

Disclosure of Invention

In order to solve all or part of the problems, the utility model aims to provide a photoelectric composite cable headstall and a DTS logging device, which can reduce the risk of unscrewing and loosening of threads, thereby improving the use safety and the use stability of the headstall and a measuring device, and improving the communication rate and the signal transmission quality, thereby improving the logging time efficiency and the measurement accuracy.

In a first aspect, the utility model provides a photoelectric composite cable headstall, which comprises a fishing cap, a middle connecting rod and a connecting rod which are sequentially connected from top to bottom, wherein the middle connecting rod is in threaded connection with the connecting rod, and the photoelectric composite cable headstall further comprises:

the cable core is used for transmitting electric signals, sequentially penetrates through the salvaging cap and the middle connecting rod, and is fixedly connected with a cable connector in the connecting rod;

the optical fiber core is used for transmitting optical signals, sequentially passes through the fishing cap and the middle connecting rod and is positioned in the connecting rod;

a first sealing member provided inside the connection rod and sealing an end portion of the optical fiber core;

the limiting pin is detachably inserted on the middle connecting rod;

the limiting groove is formed in the connecting rod;

when the middle connecting rod and the connecting rod are screwed, the limiting pin can be clamped into the limiting groove, and the middle connecting rod and the connecting rod are limited to rotate towards the unscrewing direction.

Optionally, two assembly holes are formed in the middle connecting rod, two ends of the limiting pin are in interference fit or threaded connection with the corresponding assembly holes, and the middle position of the limiting pin can be clamped into the limiting groove.

Optionally, the limit groove is annular and is arranged along the circumferential direction of the connecting rod.

Optionally, the first seal comprises:

the first sealing seat is arranged in the connecting rod, and a first sealing groove is formed in the top of the first sealing seat;

the first sealing cover is in threaded connection with the first sealing groove, and a through hole for the optical fiber core to pass through is formed in the first sealing cover;

the first sealing column is coaxially fixed at the bottom of the first sealing cover, the through hole extends to the first sealing column, and the optical fiber core can pass through the first sealing column;

the first sealing conical surface is arranged at the bottom of the first sealing column and is arranged along the circumferential direction of the first sealing column;

the first sealing inclined surface is arranged on the inner wall of the first sealing groove and is arranged along the circumferential direction of the first sealing groove, and the first sealing inclined surface is abutted with the first sealing conical surface;

the first sealing column can deform under the combined action of the first sealing conical surface and the first sealing inclined surface when the first sealing cover is screwed, and the optical fiber core is clamped.

In a second aspect, the present utility model provides a DTS logging device, comprising a photoelectric composite cable headstall, further comprising:

the DTS host is arranged above the fishing cap, and the optical fiber core is connected with the DTS host;

the upper joint is connected to the bottom of the connecting rod;

the mounting body is connected to the bottom of the upper joint;

the lower joint is connected to the bottom of the installation body and is used for being connected with an external instrument;

the optical fiber core comprises three first single-film optical fibers and two first multi-film optical fibers, the top ends of the two first multi-film optical fibers are respectively connected with corresponding channels of the DTS host, and the tail ends of the two first multi-film optical fibers are mutually welded together.

Optionally, the DTS logging device further comprises:

an optical fiber pressure gauge provided inside the mounting body;

the connecting optical fiber is connected with the optical fiber pressure gauge;

the connecting optical fibers comprise three second single-film optical fibers and two second multi-film optical fibers, and the three second single-film optical fibers and the three first single-film optical fibers are welded together in a one-to-one correspondence manner.

Optionally, a second sealing seat connected with the first sealing element is arranged in the connecting rod, a second sealing groove is formed in the bottom of the second sealing seat, a connecting hole is formed in the bottom of the second sealing groove, and the connecting hole extends to the first sealing element so that the connecting optical fiber can pass through the connecting hole and enter the first sealing element;

the second sealing groove is internally connected with a second sealing cover through threads, a second sealing column is coaxially fixed at the top of the second sealing cover, and a round hole extending to the second sealing column is formed in the second sealing cover so that the connecting optical fiber can sequentially pass through the second sealing cover and the second sealing column;

the top of the second sealing column is provided with a second sealing conical surface along the circumferential direction of the second sealing column, the bottom of the second sealing groove is provided with a second sealing inclined surface along the circumferential direction of the second sealing groove, and the second sealing conical surface is abutted with the second sealing inclined surface;

the inclination of the second sealing conical surface is larger than that of the second sealing inclined surface, and when the second sealing cover is screwed, the second sealing column can deform under the combined action of the second sealing conical surface and the second sealing inclined surface and clamp the connecting optical fiber.

Optionally, the mounting body includes:

the top end of the mounting column is connected with the upper joint, and the bottom end of the mounting column is connected with the lower joint;

the mounting groove is formed in the side wall of the mounting column, and the optical fiber pressure gauge is positioned in the mounting groove;

and the pressing piece is detachably connected to the mounting column and used for pressing the optical fiber pressure gauge in the mounting groove.

Optionally, the compressing element includes at least one group of compressing plate, just the both ends of compressing plate respectively with the erection column passes through screw connection, just compressing plate can with the fiber optic manometer compress tightly in the mounting groove.

Optionally, the mounting body further includes:

and the cover plate is detachably connected to the mounting column and is used for sealing the notch of the mounting groove.

According to the technical scheme, the headstall and the DTS logging device provided by the utility model have the following advantages:

the device realizes the spacing of middle connecting rod and connecting rod through utilizing the cooperation of spacer pin and spacing groove, if middle connecting rod want when the direction rotation of unscrewing, spacer pin and the inner wall of spacing groove can keep supporting tight state, and at this moment, middle connecting rod can't rotate towards the direction of unscrewing to make middle connecting rod unable to carry out the operation of moving back, effectively reduce the headstall and move back the problem of detaining the pine and taking off in the use, thereby improve safety in utilization and stability in utilization. Simultaneously, through the mode that utilizes cable core and optic fibre core to combine together, transmission optical signal and signal of telecommunication realize photoelectric composite ability, because the communication rate of optical signal is higher, signal transmission quality is more stable to effectively improve logging time efficiency and measurement accuracy. Moreover, the tail end of the optical fiber core can be sealed, so that the problem that the end surface reflection occurs at the tail end of the optical fiber is solved, and the quality of optical fiber signals is ensured. Simultaneously, through additionally addding the optical fiber pressure gauge in the logging device for the logging device possesses the ability to measure downhole pressure, and the simultaneous measurement of pit shaft temperature and pressure can be realized to once logging, can increase the measurement function of logging device, can improve logging efficiency again.

Additional features and advantages of the utility model will be set forth in the description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and do not limit the utility model.

FIG. 1 is a schematic diagram of the overall structure of a photoelectric composite cable headstall according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a photoelectric composite cable headstall according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an intermediate link according to an embodiment of the present utility model;

FIG. 4 is a schematic view showing the internal structure of a connecting rod according to an embodiment of the present utility model;

FIG. 5 is an enlarged schematic view of area A of FIG. 4;

FIG. 6 is a schematic diagram of the overall structure of a DTS logging device in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic diagram of an internal structure of a DTS logging device according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of an installation body of a DTS logging device according to an embodiment of the present utility model.

Reference numerals illustrate:

1. fishing the cap; 2. an intermediate connecting rod; 3. a connecting rod; 4. a limiting pin; 5. a fitting hole; 6. a limit groove; 7. a cable core; 8. an optical fiber core; 9. a first seal; 91. a first seal seat; 92. a first seal groove; 93. a first sealing cover; 94. a first seal post; 95. a through hole; 96. a first sealing conical surface; 97. a first sealing bevel; 10. a DTS host; 11. an upper joint; 12. a mounting body; 121. a mounting column; 122. a mounting groove; 123. a pressing member; 124. a compacting plate; 125. a screw; 13. a lower joint; 14. an optical fiber manometer; 15. connecting optical fibers; 16. a second seal seat; 17. a second seal groove; 18. a connection hole; 19. a second sealing cover; 20. a second seal post; 21. a second sealing conical surface; 22. a second sealing bevel; 23. a limit screw; 24. a round hole; 25. a cover plate;

100. a headstall; 200. DTS logging device.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be arbitrarily combined with each other.

Referring to fig. 1, 2, 3, 4 and 5, an embodiment of the present utility model is shown, and an optoelectronic compound cable headstock 100 is disclosed in the embodiment, and includes a fishing cap 1, a middle connecting rod 2 and a connecting rod 3 sequentially arranged from top to bottom, the fishing cap 1 is fixedly connected with the middle connecting rod 2, and the top end of the connecting rod 3 is inserted into the tail end of the middle connecting rod 2 and is in threaded connection with the middle connecting rod 2.

In one embodiment, as shown in fig. 1, 2 and 3, the middle connecting rod 2 is detachably inserted with a limiting pin 4, two assembly holes 5 are formed in the middle connecting rod 2, and two ends of the limiting pin 4 are respectively in interference fit or threaded connection with the corresponding assembly holes 5.

In one embodiment, as shown in fig. 1, 2 and 3, the side wall of the connecting rod 3 is provided with an annular limiting groove 6 along the circumferential direction, and after the middle connecting rod 2 is screwed with the connecting rod 3, the middle position of the limiting pin 4 can be clamped into the limiting groove 6, and the middle connecting rod 2 and the connecting rod 3 are limited to rotate towards the unscrewing direction.

The photoelectric composite cable headstock 100 in this embodiment utilizes the cooperation of spacer pin 4 and spacing groove 6 to realize spacing of intermediate link 2 and connecting rod 3, and if intermediate link 2 wants to rotate towards the direction of unscrewing, spacer pin 4 and the inner wall of spacing groove 6 can keep the tight state of support. At this time, the intermediate connecting rod 2 and the connecting rod 3 cannot rotate towards the unscrewing direction, so that the intermediate connecting rod 2 cannot carry out the back-buckling operation, the problem that the threads of the photoelectric composite cable headstall 100 are unscrewed and loosened in the use process is effectively reduced, and the use safety and the use stability are improved.

In this embodiment, the limiting groove 6 is a tool retracting groove on the connecting rod 3, and in other embodiments, the limiting groove 6 may be an additionally opened ring groove. In this embodiment, as shown in fig. 2, after the intermediate connecting rod 2 is screwed to the connecting rod 3, the two assembly holes 5 are aligned with the limit grooves 6, respectively, and then the limit pins 4 are inserted into the two assembly holes 5, and both ends of the limit pins 4 are interference fit with the corresponding assembly holes 5, respectively. At this time, if the middle position of the limiting pin 4 is clamped into the limiting groove 6 and the middle connecting rod 2 and the connecting rod 3 want to rotate towards the unscrewing direction, the middle connecting rod 2 and the connecting rod 3 are separated (that is, the middle connecting rod 2 wants to move leftwards), at this time, the middle connecting rod 2 cannot move leftwards due to the fact that the limiting pin 4 is in a tight abutting state with the inner wall on the left side of the limiting groove 6, and therefore the middle connecting rod 2 cannot rotate, and therefore the unbuckling operation cannot be performed.

In one embodiment, as shown in fig. 4 and 5, the optical-electrical composite cable headstock 100 further comprises a cable core 7 and an optical fiber core 8, wherein the cable core 7 is used for transmitting electrical signals, and the cable core 7 sequentially passes through the fishing cap 1 and the intermediate connecting rod 2 and is fixedly connected with a cable connector inside the connecting rod 3. Meanwhile, the optical fiber core 8 is used for transmitting optical signals, and the optical fiber core 8 sequentially passes through the fishing cap 1 and the middle connecting rod 2 and is positioned in the connecting rod 3.

Through the mode that utilizes cable core 7 and optic fibre core 8 to combine together, transmission optical signal and signal of telecommunication simultaneously realize photoelectric composite ability, because the communication rate of optical signal is higher, signal transmission quality is more stable to effectively improve logging time efficiency and measurement accuracy.

In one embodiment, as shown in fig. 4 and 5, the connecting rod 3 is provided inside with a first seal 9, and the first seal 9 is used to seal the end of the optical fiber core 8. Since the end of the optical fiber core 8 is in a suspended state in the connecting rod 3, the end reflection occurs at the end of the optical fiber in consideration of the propagation of light in the optical fiber, affecting the optical fiber signal quality, the end of the optical fiber core 8 is sealed with the first sealing member 9 to improve the problem.

In one embodiment, as shown in fig. 4 and 5, the first sealing member 9 includes a first sealing seat 91 located inside the connecting rod 3, a first sealing groove 92 is formed at the top of the first sealing seat 91, and a first sealing cover 93 is connected to the first sealing groove 92 by internal threads.

In one embodiment, as shown in fig. 4 and 5, a first sealing post 94 is coaxially and fixedly connected to the bottom of the first sealing cover 93, a through hole 95 for the optical fiber core 8 to pass through is formed in the first sealing cover 93, and the through hole 95 extends to the first sealing post 94, so that the optical fiber core 8 can pass through the first sealing post 94 and enter the first sealing groove 92.

In one embodiment, as shown in fig. 4 and 5, a first sealing conical surface 96 is integrally formed at the bottom of the first sealing column 94 along the circumferential direction thereof, a first sealing inclined surface 97 is integrally formed at the inner wall of the first sealing groove 92 near the groove bottom along the circumferential direction thereof, and the first sealing inclined surface 97 abuts against the first sealing conical surface 96.

In one embodiment, as shown in fig. 4 and 5, the slope of the first sealing conical surface 96 is greater than the slope of the first sealing inclined surface 97 (i.e., the angle between the first sealing conical surface 96 and the horizontal plane is greater than the angle between the first sealing inclined surface 97 and the horizontal plane, and it is understood that the slope of the first sealing conical surface 96 is steeper, so that the wall thickness of the first sealing post 94 is thinner), and the first sealing post 94 is made of a deformable material, so that when the first sealing cover 93 is screwed, the first sealing post 94 moves downward and can deform under the combined action of the first sealing conical surface 96 and the first sealing inclined surface 97, thereby clamping the optical fiber core 8. At this time, a sealed cavity is formed between the bottom surface of the first sealing post 94 and the groove bottom of the first sealing groove 92, and the end portion of the optical fiber core 8 is located in the sealed cavity, so that the end portion of the optical fiber core 8 is sealed.

According to the process, the photoelectric composite cable headstall 100 is adopted, so that the middle connecting rod 2 and the connecting rod 3 cannot rotate towards the unscrewing direction, the middle connecting rod 2 cannot be subjected to the unscrewing operation, the problem that threads of the photoelectric composite cable headstall 100 are unscrewed and loosened in the using process is effectively solved, and therefore the using safety and the using stability are improved. Moreover, the tail end of the optical fiber core 8 is sealed by the first sealing piece 9, so that the risk that an optical signal is reflected by the end face of the optical fiber is reduced, the quality of the optical fiber signal is ensured, and the use stability is improved.

Fig. 6, 7 and 8 show an embodiment of the present utility model, in which a DTS logging device 200 is further disclosed, including the above-mentioned photoelectric composite cable headstall 100, further including a DTS host 10, an upper connector 11, an installation body 12 and a lower connector 13, where the DTS host 10 is disposed above the fishing cap 1.

In one embodiment, as shown in fig. 6, 7 and 8, the upper connector 11 is screwed to the bottom of the connection rod 3, the mounting body 12 is fixedly connected to the bottom of the upper connector 11, the lower connector 13 is fixedly connected to the bottom of the mounting body 12, and the lower connector 13 is used for connection with an external instrument.

In one embodiment, as shown in fig. 6, 7 and 8, the optical fiber core 8 includes three first single-film optical fibers and two first multi-film optical fibers, wherein the top ends of the two first multi-film optical fibers are respectively connected with the corresponding channels of the DTS host computer 10, and the tail ends of the two first multi-film optical fibers are mutually welded together, so that the two first multi-film optical fibers can form a loop, thereby realizing DTS double-end measurement.

In one embodiment, as shown in fig. 6 and 7, an optical fiber pressure gauge 14 is disposed in the installation body 12, a connection optical fiber 15 is connected to the top of the optical fiber pressure gauge 14, the connection optical fiber 15 includes three second single-film optical fibers and two second multi-film optical fibers, and the three second single-film optical fibers are welded together in a one-to-one correspondence with the three first single-film optical fibers, so that the DTS logging device 200 has the capability of measuring the wellbore pressure.

In one embodiment, as shown in fig. 6 and 7, the second sealing seat 16 is disposed inside the connecting rod 3, and the second sealing seat 16 is integrally formed and connected to the bottom of the first sealing seat 91, meanwhile, the second sealing seat 17 is disposed at the bottom of the second sealing seat 16, the bottom of the second sealing seat 17 is provided with a connecting hole 18, and the connecting hole 18 extends into the first sealing seat 91 and is communicated with the first sealing groove 92, so that the connecting optical fiber 15 can pass through the connecting hole 18 and enter the first sealing groove 92.

In one embodiment, as shown in fig. 6 and 7, a second sealing cover 19 is connected to the second sealing groove 17 through internal threads, and a second sealing post 20 is coaxially and fixedly connected to the top of the second sealing cover 19. The second sealing cap 19 is provided with a circular hole 24 extending to the second sealing post 20 so that the connection optical fiber 15 can sequentially pass through the second sealing cap 19 and the second sealing post 20. Meanwhile, a second sealing conical surface 21 is arranged at the top of the second sealing column 20 along the circumferential direction, a second sealing inclined surface 22 is arranged on the inner wall of the second sealing groove 17 close to the groove bottom along the circumferential direction, and the second sealing conical surface 21 is abutted with the second sealing inclined surface 22.

In one embodiment, as shown in fig. 6 and 7, the slope of the second sealing tapered surface 21 is greater than the slope of the second sealing inclined surface 22, and when the second sealing cap 19 is screwed, the second sealing post 20 can move downward and deform under the cooperation of the second sealing tapered surface 21 and the second sealing inclined surface 22, thereby clamping the connection optical fiber 15. At this time, a sealed cavity is formed among the first sealing post 94, the second sealing post 20, the first sealing groove 92 and the second sealing groove 17, and the connection end for connecting the optical fiber 15 and the optical fiber core 8 is located in the sealed cavity, so that sealing is achieved.

In this embodiment, the structure, dimensions and materials of the second sealing post 20 and the first sealing post 94 are identical, the structure of the second sealing inclined plane 22 and the structure of the first sealing inclined plane 97 are identical, the structure of the second sealing conical plane 21 and the structure of the first sealing conical plane 96 are identical (i.e. mirror image arrangement), and the sealing principle is identical to that of the first sealing member 9, which is not described herein.

In one embodiment, as shown in fig. 6 and 8, the mounting body 12 includes a vertically disposed mounting post 121, a top end of the mounting post 121 is fixedly connected to the upper joint 11, and a bottom end of the mounting post 121 is fixedly connected to the lower joint 13. Meanwhile, a mounting groove 122 is provided in a side wall of the mounting post 121, and the optical fiber pressure gauge 14 is located in the mounting groove 122.

In one embodiment, as shown in fig. 6 and 8, a pressing member 123 is detachably connected to the mounting post 121, and the pressing member 123 is used to press the optical fiber pressure gauge 14 into the mounting groove 122. Meanwhile, the mounting post 121 is detachably connected with a cover plate 25, and the cover plate 25 is used for sealing the notch of the mounting groove 122 so as to realize shielding protection of the fiber pressure gauge 14 and the pressing piece 123.

In one embodiment, as shown in fig. 6 and 8, the compressing member 123 includes at least one group of compressing plates 124, in this embodiment, only three compressing plates 124 are shown, and two ends of each compressing plate 124 are detachably connected to the mounting post 121 through screws 125, and when the compressing plate 124 is fixed to the mounting post 121, the compressing plate 124 can compress the optical fiber manometer 14 in the mounting groove 122.

In one embodiment, as shown in fig. 6 and 8, the cover plate 25 is connected with the mounting post 121 through a plurality of limit screws 23, and in other embodiments, the cover plate 25 may be connected with the mounting post 121 through a clamping, magnetic attraction, or other manners, so long as the cover plate 25 can be guaranteed to be detachable, which is not excessively listed herein.

According to the process, the device can be used for simultaneously transmitting the optical signal and the electric signal, so that photoelectric composite capacity is realized, and the logging time effect and the measurement accuracy are effectively improved due to higher communication rate of the optical signal and more stable signal transmission quality. Meanwhile, according to the temperature measurement principle of the multi-film optical fibers, the temperature detection of the whole well section can be realized, and as the single first multi-film optical fiber generates larger noise at the tail end when detecting the temperature of the whole well section and affects the resolution and the precision, the device welds the tail ends of the two first multi-film optical fibers and seals the tail ends of the optical fibers according to the sealing element, so that the resolution and the precision of optical fiber signals are improved.

Furthermore, two first multi-film optical fibers are connected into the dual channels of the DTS host 10 on the ground, so that double-end measurement of the optical fiber DTS is formed, and the resolution and the precision of optical fiber temperature measurement are further improved. Meanwhile, by arranging the optical fiber pressure gauge 14, the device can realize the capability of measuring the target layer pressure while realizing the temperature and vibration measurement of the distributed optical fiber, thereby realizing multifunction and improving the measurement efficiency.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is two or more unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. The utility model provides a photoelectric composite cable headstall, includes by last fishing cap (1), intermediate link (2) and connecting rod (3) that connect gradually down, just intermediate link (2) with connecting rod (3) threaded connection, its characterized in that still includes:

the cable core (7) is used for transmitting electric signals, and the cable core (7) sequentially penetrates through the fishing cap (1) and the middle connecting rod (2) and is fixedly connected with a cable connector in the connecting rod (3);

the optical fiber core (8) is used for transmitting optical signals, and the optical fiber core (8) sequentially penetrates through the fishing cap (1) and the middle connecting rod (2) and is positioned in the connecting rod (3);

a first seal (9) provided inside the connecting rod (3) and sealing the end of the optical fiber core (8);

the limiting pin (4) is detachably inserted on the middle connecting rod (2);

the limiting groove (6) is formed in the connecting rod (3);

after the middle connecting rod (2) is screwed with the connecting rod (3), the limiting pin (4) can be clamped into the limiting groove (6), and the middle connecting rod (2) and the connecting rod (3) are limited to rotate towards the unscrewing direction.

2. The photoelectric composite cable headstall according to claim 1, characterized in that two assembly holes (5) are formed in the middle connecting rod (2), two ends of the limiting pin (4) are respectively in interference fit or threaded connection with the corresponding assembly holes (5), and the middle position of the limiting pin (4) can be clamped into the limiting groove (6).

3. The photoelectric composite cable headstock according to claim 2, characterized in that the limit groove (6) is ring-shaped and arranged along the circumferential direction of the connecting rod (3).

4. The optoelectronic composite cable headstall according to claim 1, characterized in that the first sealing element (9) comprises:

the first sealing seat (91) is arranged in the connecting rod (3), and a first sealing groove (92) is formed in the top of the first sealing seat (91);

the first sealing cover (93) is in threaded connection with the first sealing groove (92), and a through hole (95) for the optical fiber core (8) to pass through is formed in the first sealing cover (93);

a first sealing post (94) coaxially fixed to the bottom of the first sealing cap (93), and the through hole (95) extends to the first sealing post (94) and enables the optical fiber core (8) to pass through the first sealing post (94);

a first sealing tapered surface (96) which is provided at the bottom of the first sealing column (94) and is provided along the circumferential direction of the first sealing column (94);

a first seal inclined surface (97) which is provided on the inner wall of the first seal groove (92) and is provided in the circumferential direction of the first seal groove (92), the first seal inclined surface (97) being in contact with the first seal tapered surface (96);

the inclination of the first sealing conical surface (96) is larger than that of the first sealing inclined surface (97), and when the first sealing cover (93) is screwed, the first sealing column (94) can deform under the combined action of the first sealing conical surface (96) and the first sealing inclined surface (97) and clamp the optical fiber core (8).

5. A DTS logging device comprising a photoelectric composite cable headstall according to any of claims 1-4, further comprising:

the DTS host (10) is arranged above the fishing cap (1);

an upper joint (11) connected to the bottom of the connecting rod (3);

a mounting body (12) connected to the bottom of the upper joint (11);

a lower joint (13) connected to the bottom of the mounting body (12) and used for connecting with an external instrument;

the optical fiber core (8) comprises three first single-film optical fibers and two first multi-film optical fibers, the top ends of the two first multi-film optical fibers are respectively connected with corresponding channels of the DTS host (10), and the tail ends of the two first multi-film optical fibers are mutually welded together.

6. The DTS logging device of claim 5, further comprising:

an optical fiber pressure gauge (14) provided inside the mounting body (12);

a connection optical fiber (15) connected to the optical fiber pressure gauge (14);

the connecting optical fibers (15) comprise three second single-film optical fibers and two second multi-film optical fibers, and the three second single-film optical fibers and the three first single-film optical fibers are welded together in a one-to-one correspondence mode.

7. The DTS logging device as claimed in claim 6, characterized in that a second sealing seat (16) connected with the first sealing member (9) is arranged inside the connecting rod (3), a second sealing groove (17) is formed in the bottom of the second sealing seat (16), a connecting hole (18) is formed in the bottom of the second sealing groove (17), and the connecting hole (18) extends onto the first sealing member (9) so that the connecting optical fiber (15) can pass through the connecting hole (18) and enter the first sealing member (9);

the second sealing groove (17) is internally connected with a second sealing cover (19) in a threaded manner, a second sealing column (20) is coaxially fixed at the top of the second sealing cover (19), and a round hole (24) extending to the second sealing column (20) is formed in the second sealing cover (19), so that the connecting optical fiber (15) can sequentially pass through the second sealing cover (19) and the second sealing column (20);

a second sealing conical surface (21) is arranged at the top of the second sealing column (20) along the circumferential direction of the second sealing column, a second sealing inclined surface (22) is arranged at the bottom of the second sealing groove (17) along the circumferential direction of the second sealing groove, and the second sealing conical surface (21) is abutted with the second sealing inclined surface (22);

the inclination of the second sealing conical surface (21) is larger than that of the second sealing inclined surface (22), and when the second sealing cover (19) is screwed, the second sealing column (20) can deform under the combined action of the second sealing conical surface (21) and the second sealing inclined surface (22) and clamp the connecting optical fiber (15).

8. The DTS logging device of claim 6, wherein the mounting body (12) comprises:

the top end of the mounting column (121) is connected with the upper joint (11), and the bottom end of the mounting column is connected with the lower joint (13);

the mounting groove (122) is formed in the side wall of the mounting column (121), and the optical fiber pressure gauge (14) is positioned in the mounting groove (122);

and the pressing piece (123) is detachably connected to the mounting column (121) and is used for pressing the optical fiber pressure gauge (14) into the mounting groove (122).

9. The DTS logging device of claim 8, wherein the hold-down member (123) comprises at least one set of hold-down plates (124), and both ends of the hold-down plates (124) are connected to the mounting posts (121) by screws (125), respectively, and the hold-down plates (124) are capable of holding down the fiber optic manometer (14) within the mounting slots (122).

10. The DTS logging device of claim 8, wherein the mounting body (12) further comprises:

and the cover plate (25) is detachably connected to the mounting column (121), and the cover plate (25) is used for sealing the notch of the mounting groove (122).

Images