Photoelectric composite cable head

Abstract

A photoelectric composite cable head belongs to the technical field of cables for oil wells in the petroleum industry, and comprises a photoelectric composite cable and a photoelectric composite cable head, and the photoelectric composite cable is connected with the photoelectric composite cable head in an inserted mode. The photoelectric composite cable head comprises a fishing device, a branching device, an optical fiber sealing device, a test instrument / tractor connecting device and a positive and negative connecting cylinder, the fishing head is connected with the test instrument / tractor connecting device through the positive and negative connecting cylinder to form an integrated device, and the fishing device, the branching device and the optical fiber sealing device are sequentially arranged in the integrated device. And the photoelectric composite cable is hit into the photoelectric composite cable head. The multi-layer insulation, sealing and bridging protection technology is adopted, the technical problems of optical unit sealing, optical unit and power supply core insulation, power supply core sealing and insulation, normal power supply and communication of instruments and the like are effectively solved, and production and profile analysis such as vertical well annulus testing and multi-section fractured horizontal well subdivision cluster can be achieved; and the testing efficiency of oil and gas well distributed optical fiber monitoring is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables for oil wells in the petroleum industry, and particularly relates to an optical and electrical composite cable head. Background Art

[0002] Fluid production profile logging is an important supporting technology for oilfield development, and the fluid production profile logging data is an important basis for formulating and adjusting oilfield development plans. The turbine flowmeter is still the main method for flow measurement in fluid production profile logging of oil wells. However, when using the turbine flowmeter method for evaluating heavy oil, high-temperature wells, including horizontal wells, there are limitations: (1) Since the crude oil is located deep and has a high viscosity, the rotation of the impeller of the turbine flowmeter is blocked, seriously affecting the operation of the turbine flowmeter and reducing the accuracy of test data; (2) Under the completion method of large sections and multiple clusters in volumetrically fractured horizontal wells, when using a turbine flowmeter for testing, there are many corresponding test points, the measurement time is too long, the liquid flow state has changed, and the poor real-time performance leads to deviations in the test process, making it difficult to achieve fine cluster production profile testing.

[0003] Optical and electrical composite distributed optical fiber monitoring can effectively solve the above problems, with high measurement accuracy, not easily affected by electromagnetic interference, and easy for downhole permanent monitoring. The optical and electrical composite cable highly integrates multimode optical fibers, single-mode optical fibers, and power supply cores into the logging cable. After being connected to the cable head, it is connected to conventional logging instruments and a horizontal well cable tractor for simultaneous distributed optical fiber temperature and distributed acoustic wave monitoring. Due to the complex sealing and insulation of the multi-layer structure of the optical and electrical composite cable, there is currently no matching cable head. To ensure the smooth completion of the fluid production profile logging task, it is urgent to develop an optical and electrical composite cable head. Summary of the Invention

[0004] In order to solve the above existing problems, the utility model proposes an optical and electrical composite cable head, which includes an optical and electrical composite cable and an optical and electrical composite cable head, and the optical and electrical composite cable is inserted into the optical and electrical composite cable head.

[0005] Furthermore, the optical and electrical composite cable head includes a fishing device, a wire splitting device, an optical fiber sealing device, a test instrument / tractor connecting device, and a positive and negative connection cylinder. The fishing head is connected to the test instrument / tractor connecting device through the positive and negative connection cylinder to form an integrated device. The fishing device, the wire splitting device, and the optical fiber sealing device are sequentially arranged in the integrated device, and the optical and electrical composite cable is driven into the optical and electrical composite cable head.

[0006] Further, the fishing device includes a tapered frame, a large tapered sleeve, a small tapered sleeve, a cable core ring, and a cable core sleeve. A tapered frame is arranged inside the fishing head, and the tapered frame, the large tapered sleeve, and the small tapered sleeve are sleeved in sequence from outside to inside. The openings of the small-diameter ends of the large tapered sleeve and the small tapered sleeve face the opening end of the fishing head, and the large-diameter ends of the large tapered sleeve and the small tapered sleeve abut against the cable core ring. The cable core ring abuts against the cable core sleeve, and the cable core sleeve is clamped in the fishing head.

[0007] Further, the hybrid fiber optic cable includes an outer steel armor, an inner steel armor, a conductor sheath, an outer conductor, an inner sheath, an optical fiber outer armor, and a bare fiber. The outer steel armor, the inner steel armor, the conductor sheath, the outer conductor, the inner sheath, the optical fiber outer armor, and the bare fiber are connected in sequence and their diameters decrease in sequence.

[0008] Further, the wire splitting device is a three-way rubber sleeve.

[0009] Further, the hybrid fiber optic cable is driven into the hybrid fiber optic cable head fishing device. The large tapered sleeve separates and fixes the outer steel armor, and the small tapered sleeve separates and fixes the inner steel outer armor.

[0010] Further, the hybrid fiber optic cable passes through the three-way rubber sleeve, and the three-way rubber sleeve divides the conductor sheath, the outer conductor, the inner sheath, the optical fiber outer armor, and the bare fiber of the hybrid fiber optic cable into two paths.

[0011] Further, in one path, after the three-way rubber sleeve fixes the conductor sheath, an external wire is welded to the outer conductor and then connected to a pin, converting it into a plug-in connection form required by a test instrument or a tractor, and then powering the test instrument or the tractor.

[0012] Further, in the other path, an optical fiber sealing device fixes the inner sheath and the optical fiber outer armor, and the end of the bare fiber after misaligned fusion splicing and noise reduction enters the end of the optical fiber sealing device to achieve bare fiber sealing.

[0013] Further, the optical fiber sealing device includes an upper cone cap, a cone sleeve cap, a lower cone cap, a ferrule body, and an end sealing body. The cone sleeve cap is connected to the ferrule body, the upper cone cap and the lower cone cap are connected in sequence inside the cone sleeve cap, and the ferrule body is connected to the end sealing body.

[0014] Further, the upper cone cap, the cone sleeve cap, and the lower cone cap of the optical fiber sealing device fix the inner sheath. The optical fiber outer armor and the bare fiber pass through the ferrule body. The ferrule body fixes the optical fiber outer armor, and the end of the bare fiber after misaligned fusion splicing and noise reduction enters the end sealing body to achieve bare fiber sealing.

[0015] Further, the test instrument / tractor connection device includes a single-core plug, a single-core blue plug, a sealing plug, and a high-pressure sealing rubber sleeve. The single-core blue plug is inserted into the end of the single-core plug. A circlip for limiting the single-core blue plug is provided at the end of the single-core plug. The front end of the single-core plug is inserted with the sealing plug, and the high-pressure sealing rubber sleeve is provided on the sealing plug.

[0016] Further, the test instrument / tractor connection device is connected to the positive and negative connection cylinder through an internal hexagon socket set screw.

[0017] Further, a first O-ring for fixing the single-core blue plug is provided at the end of the single-core plug.

[0018] Further, a slotted pan head screw is provided on the positive and negative connection cylinder.

[0019] Further, a second O-ring is provided on the contact surface where the ferrule body is connected to the end sealing body.

[0020] Further, an internal hexagon flat end set screw is provided on the fishing head.

[0021] Further, the outside of the ferrule body and the end sealing body is wound with high-pressure sealing tape to ensure the insulation and sealing between the external wire and the inner wall of the positive and negative connection cylinder.

[0022] Further, connect the positive and negative connection cylinder to the test instrument / tractor connection device and the fishing device, tighten all the screws, remove the slotted pan head screw, inject silicone grease into the positive and negative connection cylinder until the silicone grease flows out from the insertion end of the optoelectronic composite cable, and then tighten the slotted pan head screw to achieve the internal sealing of the optoelectronic composite cable head.

[0023] Further, after connecting the optoelectronic composite cable to the optoelectronic composite cable head, the optoelectronic composite cable head is connected to the liquid production profile tester with a current collecting umbrella turbine flowmeter as the core. The upper end forms a vertical well optoelectronic integration test system with the well logging surface numerical control instrument, DTS distributed temperature test system, and DAS distributed acoustic wave test system, and conducts liquid production profile test and evaluation in flowing vertical wells and vertical well annulus fracturing wells.

[0024] Further, the cable head is connected to the horizontal well tractor, and the upper end forms a horizontal well optoelectronic integration test system with the well logging surface numerical control instrument, DTS distributed temperature test system, and DAS distributed acoustic wave test system, and conducts liquid production profile test and evaluation for horizontal wells.

[0025] The beneficial effects of the present utility model are as follows: In view of the complex problems of multi-layer structure sealing and insulation of the optical and electrical composite cable, the present utility model has developed an optical and electrical composite cable head. The optical and electrical composite cable head adopts multi-layer insulation, sealing and cross-connection protection technologies, and solves technical problems such as the sealing of the optical unit, the insulation between the optical unit and the power supply core, the sealing and insulation of the power supply core, and the normal power supply and communication of the instrument.

[0026] By adopting multi-layer insulation, sealing and cross-connection protection technologies, it effectively solves technical problems such as the sealing of the optical unit, the insulation between the optical unit and the power supply core, the sealing and insulation of the power supply core, and the normal power supply and communication of the instrument. It can realize production profile analysis such as vertical well annulus testing and multi-stage fracturing horizontal well fine clustering, and improve the test efficiency of distributed optical fiber monitoring in oil and gas wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of an optical and electrical composite cable head of the present utility model;

[0028] Figure 2 It is a front structural diagram of the ferrule body of the present utility model;

[0029] Figure 3 It is a side structural diagram of the ferrule body of the present utility model;

[0030] Figure 4 It is a front structural diagram of the end sealing body of the present utility model;

[0031] Figure 5 It is a side structural diagram of the end sealing body of the present utility model;

[0032] Figure 6 It is a front structural diagram of the positive and negative thread connection cylinder of the present utility model;

[0033] Figure 7 It is a side structural diagram of the positive and negative thread connection cylinder of the present utility model;

[0034] Figure 8 It is a schematic structural diagram of an optical and electrical composite cable of the present utility model;

[0035] Figure 9 It is a schematic connection diagram in the test state of the present utility model.

[0036] Reference numerals in the drawings:

[0037] 1. Fishing head, 2. Tapered frame, 3. Large tapered sleeve, 4. Small tapered sleeve, 5. Cable core ring, 6. Cable core sleeve, 7. Three-way rubber sleeve, 8. Upper tapered cap, 9. Tapered sleeve cap, 10. Lower tapered cap, 11. Ferrule body, 12. End seal body, 13. Positive and negative connection cylinder, 14. Single-core plug, 15. Single-core blue plug, 16. O-ring, 17. Hole snap ring, 18. Hexagon socket set screw with cone point, 19. Sealing plug, 20. High-pressure sealing rubber sleeve, 21. Slotted pan head screw, 22. O-ring, 23. Hexagon socket set screw with flat point. 201. Outer steel wire armor, 202. Inner steel wire armor, 203. Conductor sheath, 204. Outer conductor, 205. Inner sheath, 206. Optical fiber outer armor, 207. Bare optical fiber. Detailed implementation mode

[0038] To make the technical means and achieved purposes adopted by the present utility model easy to understand, the present utility model will be further described below in conjunction with the specific implementation mode. An optoelectronic composite cable head, as Figures 1-9 shown, includes an optoelectronic composite cable and an optoelectronic composite cable head, and the optoelectronic composite cable is inserted into the optoelectronic composite cable head.

[0039] Among them, the optoelectronic composite cable head includes a fishing device, a wire splitting device, an optical fiber sealing device, a test instrument / tractor connection device and a positive and negative connection cylinder 13. The fishing head 1 is connected to the test instrument / tractor connection device through the positive and negative connection cylinder 13 to form an integrated device. The fishing device, the wire splitting device and the optical fiber sealing device are sequentially arranged in the integrated device, and the optoelectronic composite cable is driven into the optoelectronic composite cable head.

[0040] Among them, the fishing device includes a tapered frame 2, a large tapered sleeve 3, a small tapered sleeve 4, a cable core ring 5 and a cable core sleeve 6. The tapered frame 2 is arranged in the fishing head 1, and the tapered frame 2, the large tapered sleeve 3 and the small tapered sleeve 4 are sequentially sleeved from outside to inside. The openings of the small ends of the large tapered sleeve 3 and the small tapered sleeve 4 face the opening end of the fishing head 1, the large ends of the large tapered sleeve 3 and the small tapered sleeve 4 abut against the cable core ring 5, the cable core ring 5 abuts against the cable core sleeve 6, and the cable core sleeve 6 is clamped in the fishing head 1.

[0041] Among them, the optoelectronic composite cable includes an outer steel wire armor 201, an inner steel wire armor 202, a conductor sheath 203, an outer conductor 204, an inner sheath 205, an optical fiber outer armor 206 and a bare optical fiber 207. The outer steel wire armor 201, the inner steel wire armor 202, the conductor sheath 203, the outer conductor 204, the inner sheath 205, the optical fiber outer armor 206 and the bare optical fiber 207 are sequentially connected and their diameters gradually decrease.

[0042] Among them, the wire splitting device is a three-way rubber sleeve 7.

[0043] Among them, the optical and electrical composite cable is driven into the salvage device for the optical and electrical composite cable head. The large cone sleeve 3 separates and fixes the outer steel wire armor 201, and the small cone sleeve 4 separates and fixes the inner steel wire outer armor 202.

[0044] Among them, the optical and electrical composite cable passes through the three-way rubber sleeve 7. The three-way rubber sleeve 7 divides the conductor sheath 203, the outer conductor 204, the inner sheath 205, the optical fiber outer armor 206 and the bare optical fiber 207 of the optical and electrical composite cable into two paths.

[0045] Among them, in one path, after the three-way rubber sleeve 7 fixes the conductor sheath 203, the external wire is welded to the outer conductor 204 and then connected to the plug pin, which is converted into the plug-in connection form required by the test instrument or the tractor, and then powers the test instrument or the tractor.

[0046] Among them, in the other path, the optical fiber sealing device fixes the inner sheath 205 and the optical fiber outer armor 206. The end of the bare optical fiber 207 after misaligned fusion splicing and noise reduction enters the end of the optical fiber sealing device to achieve the sealing of the bare optical fiber 207.

[0047] Among them, the optical fiber sealing device includes an upper cone cap 8, a cone sleeve cap 9, a lower cone cap 10, a ferrule body 11, and an end sealing body 12. The cone sleeve cap 9 is connected to the ferrule body 11. The cone sleeve cap 9 is sequentially connected to the upper cone cap 8 and the lower cone cap 10 inside, and the ferrule body 11 is connected to the end sealing body 12.

[0048] Among them, the upper cone cap 8, the cone sleeve cap 9, and the lower cone cap 10 of the optical fiber sealing device fix the inner sheath 205. The optical fiber outer armor 206 and the bare optical fiber 207 pass through the ferrule body 11. The ferrule body 11 fixes the optical fiber outer armor 206. The end of the bare optical fiber 207 after misaligned fusion splicing and noise reduction enters the end sealing body 12 to achieve the sealing of the bare optical fiber 207.

[0049] Among them, the test instrument / tractor connection device includes a single-core plug 14, a single-core blue plug 15, a sealing plug 19, and a high-voltage sealing rubber sleeve 20. The single-core blue plug 15 is inserted into the end of the single-core plug 14. A circlip for shaft 17 for limiting the single-core blue plug 15 is arranged at the end of the single-core plug 14. The front end of the single-core plug 14 is inserted into the sealing plug 19, and the high-voltage sealing rubber sleeve 20 is arranged on the sealing plug 19.

[0050] Among them, the test instrument / tractor connection device is connected to the positive and negative connection cylinder 13 through the socket head cap screw 18 with internal hexagon socket.

[0051] Among them, a first O-ring 16 for fixing the single-core blue plug 15 is arranged at the end of the single-core plug 14.

[0052] Among them, a slotted countersunk head screw 21 is arranged on the positive and negative connection cylinder 13.

[0053] Wherein, a second O-ring 22 is arranged on the contact surface where the ferrule body 11 is connected to the end sealing body 12.

[0054] Wherein, a socket head cap screw 23 is provided on the fishing head 1.

[0055] Wherein, the outer parts of the ferrule body 11 and the end sealing body 12 are wound with a high-pressure sealing tape to ensure the insulation and sealing between the external conducting wire and the inner wall of the positive and negative connection cylinder 13.

[0056] Wherein, the positive and negative connection cylinder 13 is connected to the test instrument / tractor connection device and the fishing device, all screws are tightened, the slotted pan head screw 21 is removed, silicone grease is injected into the positive and negative connection cylinder 13 until the silicone grease flows out from the insertion end of the optoelectronic composite cable, and then the slotted pan head screw 21 is tightened to achieve the internal sealing of the optoelectronic composite cable head.

[0057] Wherein, after the optoelectronic composite cable is connected to the optoelectronic composite cable head, the optoelectronic composite cable head is connected to a liquid production profile tester with a current collecting umbrella turbine flowmeter as the core. The upper end forms a vertical well optoelectronic integration test system with a well logging surface numerical control instrument, a DTS distributed temperature test system, and a DAS distributed acoustic wave test system, and conducts liquid production profile test and evaluation for flowing vertical wells and fractured wells in vertical well annuli.

[0058] Wherein, the cable head is connected to a horizontal well tractor, and the upper end forms a horizontal well optoelectronic integration test system with a well logging surface numerical control instrument, a DTS distributed temperature test system, and a DAS distributed acoustic wave test system, and conducts liquid production profile test and evaluation for horizontal wells.

[0059] An optoelectronic composite cable head structure mainly includes a fishing part, a wire splitting part, an optical fiber sealing part, a test instrument / tractor connection part, and a main body formed by butt-joint combination of connection cylinders from left to right, which is used to seal optical fibers and supply power to test instruments or crawlers. The fishing head passes through the optoelectronic composite cable, the large cone sleeve separates and fixes the outer steel armor, then passes through the small cone sleeve to separate and fix the inner steel outer armor, and passes through the three-way rubber sleeve. The three-way rubber sleeve divides the conductor sheath, outer conductor, inner sheath, optical fiber outer armor, and bare fiber of the optoelectronic composite cable into two paths. One path fixes the conductor sheath, and after the external wire is welded to the outer conductor and connected to the pin, it is converted into the plug-in connection form required by the test instrument or tractor, and then supplies power to the test instrument or tractor; the other path fixes the inner sheath, the optical fiber outer armor and the optical fiber pass through the ferrule body, the optical fiber outer armor is fixed, and the end of the bare fiber after dislocation fusion splicing and noise reduction enters the end sealing body to achieve bare fiber sealing. The ferrule body and the outside of the end seal are wound with high-voltage sealing tape to achieve the insulation seal between the wire and the inner wall of the positive and negative threaded connection cylinder. Then connect the positive and negative threaded connection cylinder with the test instrument / tractor connection part and the fishing part, and tighten all the screws. Remove the slotted pan head screws, inject silicone grease into the positive and negative threaded connection cylinder until the silicone grease flows out from the insertion end of the optoelectronic composite cable, and then tighten the slotted pan head screws to achieve the internal seal of the optoelectronic composite cable head.

[0060] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings used in the embodiments:

[0061] The optoelectronic composite cable is driven into the fishing part of the optoelectronic composite cable head. The large cone sleeve 3 separates and fixes the outer steel armor 201, and then the small cone sleeve 4 is driven in to separate and fix the inner steel outer armor 202. Through the tee rubber sleeve 7, the tee rubber sleeve 7 divides the conductor sheath 203, the outer conductor 204, the inner sheath 205, the optical fiber outer armor 206 and the bare optical fiber 207 of the optoelectronic composite cable into two paths. After the conductor sheath 203 is fixed in one path, the external wire is welded to the outer conductor 204 and then connected to the pin, converting it into the plug-in connection form required by the test instrument or the tractor, and then powering the test instrument or the tractor. In the other path, the inner sheath 205 is fixed, and the optical fiber outer armor 206 and the bare optical fiber 207 pass through the ferrule body 11. The optical fiber outer armor 206 is fixed, and the end of the bare optical fiber 207 after misaligned fusion splicing and noise reduction enters the end sealing body 12 to realize the sealing of the bare optical fiber 207. The outside of the ferrule body 11 and the end sealing body 12 is wrapped with high-voltage sealing tape to ensure the insulation and sealing between the wire and the inner wall of the positive and negative threaded connection cylinder 13. Then the positive and negative threaded connection cylinder 13 is connected to the connection part and the fishing part of the test instrument / tractor, and all the screws are tightened. The slotted pan head screw 21 is removed, and silicone grease is injected into the positive and negative threaded connection cylinder 13 until the silicone grease flows out from the insertion end of the optoelectronic composite cable, and then the slotted pan head screw 21 is tightened to realize the internal sealing of the optoelectronic composite cable head. After the optoelectronic composite cable is connected to the cable, the cable head is connected to the liquid production profile tester with the current collecting umbrella turbine flowmeter as the core, and the upper end forms a vertical well optoelectronic integration test system with the well logging surface numerical control instrument, the DTS distributed temperature test system, and the DAS distributed acoustic wave test system, and conducts liquid production profile test and evaluation in the flowing vertical well and the vertical well annulus fracturing well; the cable head is connected to the horizontal well tractor, and the upper end forms a horizontal well optoelectronic integration test system with the well logging surface numerical control instrument, the DTS distributed temperature test system, and the DAS distributed acoustic wave test system, and can conduct liquid production profile test and evaluation for the horizontal well.

[0062] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A photoelectric composite cable head, characterized in that: It includes a photoelectric composite cable and a photoelectric composite cable head, and the photoelectric composite cable and the photoelectric composite cable head are plugged in; The optoelectronic composite cable head comprises a salvaging device, a line splitting device, an optical fiber sealing device, a test instrument / tractor connecting device and a forward and reverse connecting tube (13); the salvaging head (1) is connected to the test instrument / tractor connecting device via the forward and reverse connecting tube (13) to form an integrated device; the salvaging device, the line splitting device and the optical fiber sealing device are sequentially arranged in the integrated device; the optoelectronic composite cable is inserted into the optoelectronic composite cable head.

2. The optoelectronic composite cable head according to claim 1, characterized in that: The salvaging device comprises a cone frame (2), a large cone sleeve (3), a small cone sleeve (4), a cable core ring (5) and a cable core sleeve (6); the cone frame (2) is arranged inside a salvaging head (1); the cone frame (2), the large cone sleeve (3) and the small cone sleeve (4) are sequentially sleeved from outside to inside; the openings of the ends with small diameters of the large cone sleeve (3) and the small cone sleeve (4) face the opening end of the salvaging head (1); the ends with large diameters of the large cone sleeve (3) and the small cone sleeve (4) abut against the cable core ring (5); the cable core ring (5) abuts against the cable core sleeve (6); and the cable core sleeve (6) is clamped in the salvaging head (1).

3. The optoelectronic composite cable head according to claim 2, characterized in that: The optoelectronic composite cable comprises an outer steel wire armor (201), an inner steel wire armor (202), a conductor sheath (203), an outer conductor (204), an inner sheath (205), an optical fiber outer armor (206), and a bare fiber (207). The outer steel wire armor (201), the inner steel wire armor (202), the conductor sheath (203), the outer conductor (204), the inner sheath (205), the optical fiber outer armor (206), and the bare fiber (207) are connected in sequence and their diameters decrease in sequence.

4. The optoelectronic composite cable head according to claim 3, characterized in that: The line dividing device is a three-way rubber sleeve (7).

5. The optoelectronic composite cable head according to claim 4, characterized in that: The optoelectronic composite cable is smashed into the optoelectronic composite cable head salvaging device, the large cone sleeve (3) separates and fixes the outer steel wire armor (201), and the small cone sleeve (4) separates and fixes the inner steel wire armor (202).

6. The optoelectronic composite cable head according to claim 5, characterized in that: The optoelectronic composite cable passes through a three-way rubber sleeve (7), and the three-way rubber sleeve (7) divides the conductor sheath (203), the outer conductor (204), the inner sheath (205), the optical fiber outer armor (206) and the bare fiber (207) of the optoelectronic composite cable into two paths.

7. The optoelectronic composite cable head according to claim 6, characterized in that: One way is that after the conductor sheath (203) is fixed by the three-way rubber sleeve (7), the external wire is connected to the external conductor (204) after welding and connected to the pin, and converted into the plug connection form required by the test instrument or tractor, and then the test instrument or tractor is powered.

8. The optoelectronic composite cable head according to claim 6, characterized in that: The other way is that the optical fiber sealing device fixes the inner protective layer (205) and the optical fiber outer armor (206), and the end of the bare fiber (207) after offset fusion splicing and noise removal enters the end of the optical fiber sealing device to achieve the sealing of the bare fiber (207).

9. The optoelectronic composite cable head according to claim 1, characterized in that: The optical fiber sealing device comprises an upper cone cap (8), a cone sleeve cap (9), a lower cone cap (10), a ferrule body (11), and an end sealing body (12); the cone sleeve cap (9) is connected to the ferrule body (11); the cone sleeve cap (9) is connected to the upper cone cap (8) and the lower cone cap (10) in sequence; and the ferrule body (11) is connected to the end sealing body (12).

10. The optoelectronic composite cable head according to claim 8, characterized in that: The upper cone cap (8), cone sleeve cap (9) and lower cone cap (10) of the optical fiber sealing device fix the inner protective layer (205), the optical fiber outer armor (206) and the bare fiber (207) pass through the ferrule body (11), and the ferrule body (11) fixes the optical fiber outer armor (206).

11. The optoelectronic composite cable head according to claim 1, characterized in that: The test instrument / traction device connection device comprises a single-core plug (14), a single-core flange plug (15), a sealing plug (19), and a high-pressure sealing rubber sleeve (20). The single-core flange plug (15) is plugged into the end of the single-core plug (14). The end of the single-core plug (14) is provided with an elastic retaining ring (17) for limiting the hole of the single-core flange plug (15). The front end of the single-core plug (14) is plugged with the sealing plug (19), and the high-pressure sealing rubber sleeve (20) is provided on the sealing plug (19).

12. The optoelectronic composite cable head according to claim 11, characterized in that: The testing instrument / traction device connection device is connected to the positive and negative connection cylinders (13) via a hexagonal cone-end set screw (18).

13. The optoelectronic composite cable head according to claim 11, characterized in that: A first O-ring (16) for fixing the single-core flange plug (15) is provided at the end of the single-core plug (14).

14. The optoelectronic composite cable head according to claim 11, characterized in that: The forward and reverse connecting cylinder (13) is provided with a slotted pan head screw (21).

15. The optoelectronic composite cable head according to claim 9, characterized in that: A second O-ring (22) is provided on the contact surface where the ferrule body (11) is connected to the end sealing body (12).

16. The optoelectronic composite cable head according to claim 1, characterized in that: The fishing head (1) is provided with a hexagon socket flat-end set screw (23).

17. The optoelectronic composite cable head according to claim 15, characterized in that: The outside of the ferrule body (11) and the end sealing body (12) are wrapped with high-pressure sealing tape to ensure the insulation and sealing of the externally connected wires and the inner walls of the positive and negative connecting tubes (13).

18. The optoelectronic composite cable head according to claim 14, characterized in that: Connect the forward and reverse connection tube (13) to the test instrument / tractor connection device and the salvage device, tighten all screws, remove the slotted pan head screw (21), inject silicone grease into the forward and reverse connection tube (13) until the silicone grease flows out from the insertion end of the optoelectronic composite cable, and tighten the slotted pan head screw (21) to achieve internal sealing of the optoelectronic composite cable head.

19. The optoelectronic composite cable head according to claim 18, characterized in that: After the photoelectric composite cable is connected to the photoelectric composite cable head, the photoelectric composite cable head is connected to a fluid production profile tester with a collecting umbrella turbine flowmeter as the core, and the upper end is connected to a well logging ground numerical control instrument, a DTS distributed temperature test system, and a DAS distributed acoustic wave test system to form a vertical well photoelectric integrated test system, and the fluid production profile test and evaluation of the fracturing well are carried out in a self-flowing vertical well and a vertical well annulus.

20. The optoelectronic composite cable head according to claim 18, characterized in that: The cable head is connected to the horizontal well tractor, and the upper end is connected to the well logging surface numerical control instrument, DTS distributed temperature test system, and DAS distributed acoustic wave test system to form a horizontal well optoelectronic integrated test system for horizontal well fluid production profile test and evaluation.

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