CN217639673U - Wellhead optical cable optical fiber high-pressure water clock plugging device - Google Patents
Wellhead optical cable optical fiber high-pressure water clock plugging device Download PDFInfo
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- CN217639673U CN217639673U CN202220585130.6U CN202220585130U CN217639673U CN 217639673 U CN217639673 U CN 217639673U CN 202220585130 U CN202220585130 U CN 202220585130U CN 217639673 U CN217639673 U CN 217639673U
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Abstract
The utility model relates to a wellhead optical cable optical fiber high-pressure water clock plugging device, which comprises an optical cable fixing and plugging mechanism, a double-head hexagon bolt (3) and a fiber core fixing and plugging mechanism; the armored protective layer (11) is abutted and sealed in the optical cable fixing and plugging mechanism, the optical fiber core (10) is abutted and sealed in the fiber core fixing and plugging mechanism, and the optical cable fixing and plugging mechanism and the fiber core fixing and plugging mechanism are connected to two ends of the double-headed hexagon bolt (3) respectively. The double-head hexagon bolt (3) sequentially comprises a large thread head (32), a hexagon bolt body (30) and a small thread head (34) which are integrally formed; the optical cable fixing and plugging mechanism is connected with the large thread head (32) in a matching mode, and the fiber core fixing and plugging mechanism is connected with the small thread head (34) in a matching mode. Compared with the prior art, the utility model has the advantages of constitute three-dimensional sealed space, reach space seal's effect, satisfy the production demand, can effectively solve optical cable exit water clock problem.
Description
Technical Field
The utility model relates to an optical fiber monitoring field, concretely relates to well head optical cable optic fibre high pressure water clock plugging device.
Background
In the shale gas well hydraulic fracturing process, an armored optical cable is installed in an oil layer casing pipe at the innermost layer of an oil gas well and is permanently arranged outside the casing pipe along with well cementation, and through a distributed optical fiber acoustic sensing (DAS) technology, full-frequency-band acoustic response in liquid inlet sand adding and back discharging in the fracturing process can be obtained, so that the conditions of liquid inlet amount and sand adding amount of each cluster are subdivided, and the fracturing effect is analyzed.
However, because the conditions in the well are complex and the brittleness of the optical cable material is high, the optical cable can be broken under the action of strong stress, and the strong pressure liquid in the well can enter a gap in the optical cable, namely a gap between the fiber core and the armor protective layer, flows along the gap and seeps out from the optical cable at the well head, so that certain potential safety hazards are caused under the condition that normal construction is influenced.
According to the structure of the pre-plugging optical cable, the optical cable pressure, the matched pressure-resistant component is customized, the wellhead optical cable is plugged by manually installing the plugging device, the potential safety hazard is eliminated, and the later-stage construction process is not influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a well head optical cable optic fibre high pressure water clock plugging device who constitutes three-dimensional sealing space, reaches space seal's effect, satisfies the production demand, can effectively solve the optical cable exit water clock problem in order to overcome the defect that above-mentioned prior art exists and provide one kind.
The purpose of the utility model can be realized by the following technical proposal:
the designer knows, along with the development of the optical fiber logging technology, a batch of matching processes and flows related to the optical fiber technology are developed, not only the breakthrough and the development of the optical fiber technology, but also some solutions of sudden situations exist, the utility model mainly aims at the problem that high-pressure fluid overflows from an optical fiber port through optical fibers due to the influence of complex effects such as stress, cracks and the like in a well in the fracturing construction process, researches and develops a plugging device with continuous high pressure resistance, can effectively plug the optical fiber port, avoids high-pressure liquid or gas in the well, even prevents toxic and harmful substances from dripping or diffusing from the optical fiber port, namely prevents the toxic and harmful substances from entering a gap between a fiber core and an armor protective layer,
meanwhile, as shown in fig. 2, the outer surface of the optical cable is provided with an armor protective layer, the inner diameter is larger, the inner surface is provided with an optical fiber core, the inner diameter is smaller, the optical cable is required to enter the plugging device during plugging, and meanwhile, the optical fiber core penetrates out of the plugging device. In the process, effective penetration of the optical fiber core is ensured, and the plugging device can seal high-pressure fluid to achieve the purpose of sealing the optical fiber of the optical cable, and the specific scheme is as follows:
a wellhead optical cable optical fiber high-pressure water clock plugging device comprises an optical cable fixing and plugging mechanism, a double-headed hexagon bolt and a fiber core fixing and plugging mechanism;
the armored protective layer is connected and sealed in the optical cable fixing and plugging mechanism in an abutting mode, the optical fiber core is connected and sealed in the fiber core fixing and plugging mechanism in an abutting mode, and the optical cable fixing and plugging mechanism and the fiber core fixing and plugging mechanism are connected to the two ends of the hexagon stud respectively.
Furthermore, the stud hexagon bolt sequentially comprises a large thread head, a hexagon bolt body and a small thread head which are integrally formed;
the optical cable fixing and plugging mechanism is connected with the large thread head in a matching mode, and the fiber core fixing and plugging mechanism is connected with the small thread head in a matching mode.
Further, the optical cable fixing and plugging mechanism comprises a large gasket hexagon nut matched with the large thread head, and the large gasket hexagon nut is in threaded connection with the outside of the large thread head;
the large gasket hexagon nut is internally provided with a large unthreaded circular truncated cone and a large left-hand thread circular truncated cone gasket which are buckled with each other;
the armor protective layer wear to establish in big thread head to can with the soket head cap butt.
Further, big gasket hexagon nut include the big nut body and the big lock washer of integrated into one piece, big lock washer be located the one end of keeping away from stud hexagon bolt.
The large locking gasket has the function of restraining the large unthreaded circular truncated cone and the large left-hand thread circular truncated cone gasket and preventing the large unthreaded circular truncated cone and the large left-hand thread circular truncated cone gasket from being extruded.
Furthermore, the large left-hand thread circular truncated cone gasket comprises a large-caliber end A and a small-caliber end B, and the large unthreaded circular truncated cone comprises a large-caliber end C and a small-caliber end D.
Further, the size of the large-caliber end A is smaller than the inner diameter of the large nut body and larger than the inner diameter of the large thread head; the size of the small-caliber end B is not smaller than that of the large-caliber end C; the size of the small-diameter end D is not more than the inner diameter of the large thread head and is not less than the outer diameter of the armor protective layer.
The large unthreaded round table and the large reverse-buckling round table gasket cannot deform outwards and can only deform inwards due to the structural constraint of the large gasket hexagon nut; on the other hand, the armor protective layer can not penetrate into the large thread head completely, so that the armor protective layer is exposed outside the large thread head, and the part contained in the large gasket hexagonal nut is extruded by the inward deformation of the large unthreaded circular truncated cone and the large left-hand thread circular truncated cone gasket, so that the effect of locking and sealing is achieved.
Furthermore, the fiber core fixing and plugging mechanism comprises a small gasket hexagon nut matched with the small thread head, and the small gasket hexagon nut is in threaded connection with the outside of the small thread head;
the small gasket hexagonal nut is internally provided with a small unthreaded circular truncated cone and a small reversed circular truncated cone gasket which are mutually buckled;
the optical fiber core is arranged in the small thread head in a penetrating mode and can be abutted to the hexagon bolt body.
Furthermore, the small-gasket hexagonal nut comprises a small nut body and a small locking gasket which are integrally formed, and the small locking gasket is positioned at one end far away from the hexagon stud bolt.
The small locking gasket has the function of restraining the small unthreaded round table and the small reversed buckling round table gasket and preventing the small unthreaded round table and the small reversed buckling round table gasket from being extruded.
Furthermore, the small left-hand thread circular truncated cone gasket comprises a large-diameter end a and a small-diameter end b, and the small unthreaded circular truncated cone comprises a large-diameter end c and a small-diameter end d.
Further, the size of the large-diameter end a is smaller than the inner diameter of the small nut body and larger than the inner diameter of the small thread head; the size of the small-caliber end b is not smaller than that of the large-caliber end c; the small-caliber end d is not larger than the inner diameter of the small thread head and is not smaller than the outer diameter of the optical fiber core.
The small unthreaded circular truncated cone and the small left-hand thread circular truncated cone gasket cannot deform outwards but only deform inwards due to the constraint of the structure of the small gasket hexagon nut; on the other hand, the optical fiber core can not penetrate into the small thread head completely, so that the optical fiber core is exposed outside the small thread head, and the part contained in the small gasket hexagon nut is extruded by the inward deformation of the small unthreaded circular truncated cone and the small reverse buckling circular truncated cone gasket, so that the effect of locking and sealing is achieved.
Compared with the prior art, the utility model respectively blocks the optical cable and the optical fiber, and the unthreaded round platform gasket and the unthreaded round platform are meshed together by utilizing the axial force to form a three-dimensional sealing space and achieve the effect of space sealing; the utility model discloses a supporting device has tested at the long-term dynamic monitoring scene of Zhejiang oil field producing well, through risk assessment and follow-up monitoring, satisfies the production demand, can effectively solve the water clock problem in optical cable exit.
Drawings
FIG. 1 is an exploded view of the plugging device of the example;
FIG. 2 is a schematic view of the structure of the armored protective layer and the optical fiber core of the present invention;
the reference numbers in the figures indicate: the optical fiber core 10, the armor protective layer 11, the large gasket hexagon nut 21, the large nut body 210, the large locking gasket 211, the large left-hand thread circular truncated cone gasket 22, the large unthreaded circular truncated cone 23, the double-headed hexagon bolt 3, the hexagon bolt body 30, the large threaded head 32, the small threaded head 34, the small gasket hexagon nut 41, the small nut body 410, the small locking gasket 411, the small left-hand thread circular truncated cone gasket 42 and the small unthreaded circular truncated cone 43.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
To long-term dynamic monitoring in-process, the optical cable splits in the well, and well liquid gets into the optical cable, leads to the optical cable exit to have the water clock phenomenon, if effective shutoff measure is not taken in time, will cause great potential safety hazard, the utility model discloses a solve plugging device of well head optical cable optic fibre high pressure water clock.
When the optical cable head has a dripping leakage phenomenon, the phenomenon that the optical cable in the well is broken is shown to have occurred, the serious accident situation is judged according to the dripping leakage rate of the liquid, meanwhile, the components and the temperature of the dripped liquid are measured, the pressure of an optical cable opening and the size of the optical cable are measured, and then the material, the size and the like of the follow-up plugging device are determined.
The customization accords with the optic fibre plugging device of optic fibre size, and the plugging device mainly includes: a large hexagonal nut with a gasket, a large unthreaded circular truncated cone, a large left-hand threaded circular truncated cone gasket, a large right-hand threaded circular truncated cone gasket, a double-headed hexagonal bolt and the like;
a wellhead optical cable optical fiber high-pressure water clock plugging device is shown in figure 1 and comprises an optical cable fixing plugging mechanism, a double-headed hexagon bolt 3 and a fiber core fixing plugging mechanism; the armored protection layer 11 is connected with the optical cable fixing and plugging mechanism in an abutting mode, the optical fiber core 10 is connected with the optical fiber core fixing and plugging mechanism in an abutting mode, and the optical cable fixing and plugging mechanism and the optical fiber core fixing and plugging mechanism are connected to the two ends of the hexagon stud bolts 3 respectively. The stud hexagon bolt 3 sequentially comprises a large thread head 32, a hexagon bolt body 30 and a small thread head 34 which are integrally formed; the optical cable fixing and plugging mechanism is connected with the large thread head 32 in a matching mode, and the fiber core fixing and plugging mechanism is connected with the small thread head 34 in a matching mode.
The optical cable fixing and plugging mechanism comprises a large gasket hexagon nut 21 matched with the large threaded head 32, and the large gasket hexagon nut 21 is in threaded connection with the outside of the large threaded head 32; a large unthreaded circular truncated cone 23 and a large reversed circular truncated cone gasket 22 which are buckled with each other are arranged in the large gasket hexagonal nut 21; the armor protection layer 11 is inserted into the large thread head 32 and can abut against the hexagon bolt body 30. The large-washer hexagonal nut 21 includes a large nut body 210 and a large lock washer 211 formed integrally, and the large lock washer 211 is located at an end remote from the stud hexagonal bolt 3.
The large reverse-buckling circular truncated cone gasket 22 comprises a large-caliber end A and a small-caliber end B, and the large unthreaded circular truncated cone 23 comprises a large-caliber end C and a small-caliber end D. The size of the large-caliber end A is smaller than the inner diameter of the large nut body 210 and larger than the inner diameter of the large thread head 32; the size of the small-caliber end B is not smaller than that of the large-caliber end C; the small-diameter end D is not larger than the inner diameter of the large screw head 32 and is not smaller than the outer diameter of the armor protective layer 11.
The fiber core fixing and plugging mechanism comprises a small gasket hexagon nut 41 matched with the small thread head 34, and the small gasket hexagon nut 41 is in threaded connection with the outside of the small thread head 34; a small unthreaded circular truncated cone 43 and a small reversed circular truncated cone gasket 42 which are mutually buckled are arranged in the small gasket hexagonal nut 41; the optical fiber core 10 is inserted into the small screw head 34 and can abut against the hexagon bolt body 30. The small-washer hexagon nut 41 includes a small-nut body 410 and a small lock washer 411 that are integrally formed, and the small lock washer 411 is located at an end away from the hexagon stud 3.
The small reverse-buckling circular truncated cone gasket 42 comprises a large-caliber end a and a small-caliber end b, and the small unthreaded circular truncated cone 43 comprises a large-caliber end c and a small-caliber end d. The size of the large-diameter end a is smaller than the inner diameter of the small nut body 410 and larger than the inner diameter of the small thread head 34; the size of the small-caliber end b is not smaller than that of the large-caliber end c; the small-diameter end d is sized to be no larger than the inner diameter of the small thread start 34 and no smaller than the outer diameter of the fiber core 10.
The connection sequence of the plugging device is as follows:
firstly, the armor protection layer 11 penetrates through the large gasket hexagon nut 21, penetrates through the large locking gasket 211 and penetrates out of the large nut body 210, and the port of the armor protection layer 11 is required to be smooth and convenient to penetrate. After the armor protection layer 11 penetrates through the large-gasket hexagon nut 21, the large-inverse-buckling circular truncated cone gasket 22 is required to penetrate through the armor protection layer 11 from the large-caliber end A and penetrate out from the small-caliber end B, and the large-inverse-buckling circular truncated cone gasket 22 penetrates through the armor protection layer 11 and then enters the large-gasket hexagon nut 21; after the large left-hand thread round table gasket 22 passes through, the large unthreaded round table 23 passes through the armor protection layer 11 and enters the large gasket hexagon nut 21, and the large unthreaded round table 23 is also required to pass through the armor protection layer 11 from the large caliber end C and enter the large gasket hexagon nut 21. The large unthreaded round platform 23 enters and then cooperates with the large back-off round platform gasket 22 to achieve the purpose of occlusion and sealing. The large caliber of the large unthreaded circular truncated cone 23 is slightly smaller than the diameter of the large unthreaded circular truncated cone gasket 22, and the large unthreaded circular truncated cone 23 and the large unthreaded circular truncated cone gasket 22 are required to be meshed together after being extruded by axial force at the later stage, so that the sealing purpose is achieved.
After the large-gasket hexagon nut 21, the large unthreaded circular truncated cone 23 and the large left-hand thread circular truncated cone gasket 22 are connected, the armor protective layer 11 continues to pass through the hexagon stud bolt 3. The armor protection layer 11 penetrates through the large thread head 32, and the optical fiber core 10 penetrates through the small thread head 34, wherein the surfaces of the large thread head 32 and the small thread head 34 are designed with threads. After the optical fiber core 10 passes through, the large thread head 32 is connected with the large gasket hexagon nut 21, the large gasket hexagon nut 21 is fixed, and the hexagon bolt body 30 is rotated simultaneously, so that the purpose of fastening the hexagon stud bolt 3 and the large gasket hexagon nut 21 is achieved. In the process of rotary fastening, the large unthreaded circular truncated cone 23 and the large reverse-buckling circular truncated cone gasket 22 are extruded by axial force, so that the large unthreaded circular truncated cone 23 penetrates into the large reverse-buckling circular truncated cone gasket 22, the effect of extruding the large reverse-buckling circular truncated cone gasket 22 to be engaged and fastened on the armor protective layer 11 is achieved, and the purpose of sealing is achieved.
After the stud hexagon bolt 3 is fixed, the optical fiber core 10 sequentially passes through the small unthreaded circular truncated cone 43, the small left-hand thread circular truncated cone gasket 42 and the small gasket hexagon nut 41, and the optical fiber core 10 passes through the small gasket hexagon nut 41. Similarly, the small unthreaded circular truncated cone 43 and the small reversed-buckling circular truncated cone gasket 42 are extruded by rotating the hexagonal bolt body 30 and the small gasket hexagonal nut 41, so that the purpose of extruding, tightly holding the optical fiber core 10 and sealing and fixing is achieved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. A wellhead optical cable optical fiber high-pressure water clock plugging device is characterized by comprising an optical cable fixing and plugging mechanism, a double-headed hexagon bolt (3) and a fiber core fixing and plugging mechanism;
the armored protective layer (11) is abutted and sealed in the optical cable fixing and plugging mechanism, the optical fiber core (10) is abutted and sealed in the fiber core fixing and plugging mechanism, and the optical cable fixing and plugging mechanism and the fiber core fixing and plugging mechanism are connected to two ends of the double-headed hexagon bolt (3) respectively.
2. A wellhead optical cable optical fiber high-pressure water clock plugging device as claimed in claim 1, wherein the stud hexagon bolt (3) comprises a large thread head (32), a hexagon bolt body (30) and a small thread head (34) which are integrally formed in sequence;
the optical cable fixing and plugging mechanism is connected with the large thread head (32) in a matched mode, and the fiber core fixing and plugging mechanism is connected with the small thread head (34) in a matched mode.
3. A wellhead optical cable optical fiber high-pressure water-clock plugging device as claimed in claim 2, wherein the optical cable fixing and plugging mechanism comprises a large gasket hexagon nut (21) matched with the large screw head (32), the large gasket hexagon nut (21) is connected with the outside of the large screw head (32) in a threaded manner;
a large unthreaded circular truncated cone (23) and a large reversed circular truncated cone gasket (22) which are buckled with each other are arranged in the large gasket hexagonal nut (21);
the armor protective layer (11) is arranged in the large thread head (32) in a penetrating mode.
4. A wellhead optical cable optical fiber high pressure water clock plugging device according to claim 3, wherein the large gasket hexagon nut (21) comprises a large nut body (210) and a large locking gasket (211) which are integrally formed, and the large locking gasket (211) is positioned at one end far away from the stud hexagon bolt (3).
5. A wellhead optical cable optical fiber high pressure drip plugging device according to claim 3 wherein said large reverse buckling circular truncated cone gasket (22) comprises a large caliber end a and a small caliber end B, said large unthreaded circular truncated cone (23) comprises a large caliber end C and a small caliber end D.
6. A wellhead optical cable optical fiber high-pressure water-clock plugging device according to claim 5, characterized in that the size of the large-diameter end A is smaller than the inner diameter of the large nut body (210) and larger than the inner diameter of the large thread head (32); the size of the small-caliber end B is not smaller than that of the large-caliber end C; the size of the small-diameter end D is not more than the inner diameter of the large thread head (32) and not less than the outer diameter of the armor protective layer (11).
7. A wellhead optical cable optical fiber high pressure water clock plugging device according to claim 2, characterized in that the fiber core fixing plugging mechanism comprises a small gasket hexagon nut (41) matched with the small thread head (34), the small gasket hexagon nut (41) is connected with the outside of the small thread head (34) in a threaded manner;
a small unthreaded circular truncated cone (43) and a small reversed circular truncated cone gasket (42) which are mutually buckled are arranged in the small gasket hexagonal nut (41);
the optical fiber core (10) is arranged in the small thread head (34) in a penetrating mode.
8. A wellhead optical cable optical fiber high-pressure water clock plugging device as claimed in claim 7, wherein the small gasket hexagonal nut (41) comprises a small nut body (410) and a small locking gasket (411) which are integrally formed, and the small locking gasket (411) is located at one end far away from the stud hexagonal bolt (3).
9. A wellhead cable optical fiber high pressure drip plugging device according to claim 7 wherein said small reverse buckling circular truncated cone gasket (42) comprises a large diameter end a and a small diameter end b, and said small unthreaded circular truncated cone (43) comprises a large diameter end c and a small diameter end d.
10. A wellhead optical cable optical fiber high pressure drip plugging device according to claim 9, characterized in that the size of the large diameter end a is smaller than the inner diameter of the small nut body (410) and larger than the inner diameter of the small screw head (34); the size of the small-caliber end b is not smaller than that of the large-caliber end c; the small-caliber end d is not larger than the inner diameter of the small thread head (34) and not smaller than the outer diameter of the optical fiber core (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220585130.6U CN217639673U (en) | 2022-03-17 | 2022-03-17 | Wellhead optical cable optical fiber high-pressure water clock plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220585130.6U CN217639673U (en) | 2022-03-17 | 2022-03-17 | Wellhead optical cable optical fiber high-pressure water clock plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217639673U true CN217639673U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220585130.6U Active CN217639673U (en) | 2022-03-17 | 2022-03-17 | Wellhead optical cable optical fiber high-pressure water clock plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217639673U (en) |
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2022
- 2022-03-17 CN CN202220585130.6U patent/CN217639673U/en active Active
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