Packaging device for tail end of monitoring optical cable outside sleeve

Abstract

The invention relates to the technical field of photovoltaic power station energy storage devices, and discloses a packaging device for monitoring the tail end of an optical cable outside a sleeve, an optical cable protection clamping head is assembled on an upper connector body, the optical cable extends into the optical cable protection clamping head, the optical cable is protected, and an optical cable hole and two groups of optical cable steel wire riveting holes are formed in the upper connector body. The two groups of optical cable steel wire riveting holes are distributed on the two sides of the optical cable hole, so that optical cable steel wires on the two sides of the optical cable penetrate into the two groups of optical cable steel wire riveting holes, the optical cable is fixed, the optical cable clamping hole is communicated with the optical cable hole and the two groups of optical cable steel wire riveting holes, and the optical cable is protected after the optical cable and the optical cable steel wires are stripped. The sealing assembly is arranged at the end, close to the shell, of the upper connector body, sealing of the optical cable is achieved, and damage to the sensing optical cable caused by well pressure is avoided; the sealed cabin is arranged in the shell, and external oil, gas and water are effectively isolated in the sealed cabin; a balance piston is arranged in the sealed cabin to protect the balance between the pressure in the sealed cabin and the external pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power station energy storage devices, and in particular to optical cable well logging technology, in particular to a packaging device for monitoring the tail end of an optical cable outside a casing. Background Art

[0002] Distributed optical cable sensing technology is applied to the oil industry to accelerate the construction of digital oil fields, conduct real-time dynamic monitoring of the wellbore environment, and develop distributed optical cable dynamic monitoring technology. This technology lays the sensor optical cable in the well, which can measure various parameters of the wellbore in real time and upload them to the cloud, so that customers can grasp the fluid information inside the wellbore at any time and perform the treatment of oil, gas and water wells in a timely manner. There are various ways to lay the sensor optical cable. One of the ways is to fix it on the outer wall of the oil pipe or casing and then lower it into the well for medium- and long-term, permanent and uninterrupted monitoring. Due to the complex environment inside the wellbore of oil, gas and water wells, if the tail end of the sensor optical cable is not handled properly, the sealing pressure bearing performance will not meet the long-term working requirements, and the pressure in the well will damage the sensor optical cable, accelerate hydrogen loss, and reduce the service life of the optical cable. For this reason, a downhole optical cable tail end packaging device is urgently needed. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a packaging device for the tail end of the external casing monitoring optical cable, so as to solve the technical problems that the sealing pressure bearing performance does not meet the long-term working requirements, the pressure in the well will cause damage to the sensing optical cable, accelerate hydrogen loss, and reduce the service life of the optical cable.

[0004] The present invention is achieved through the following technical solutions:

[0005] A packaging device for monitoring the tail end of an optical cable outside a casing, comprising an upper joint body, an optical cable protection clamp and an outer shell, wherein the optical cable protection clamp is assembled at one end of the upper joint body, one end of the outer shell is sleeved on the other end of the upper joint body, a plug is arranged at the other end of the outer shell, an optical cable clamping hole is opened in the optical cable protection clamp, an optical cable hole and two groups of optical cable steel wire rivet holes are arranged in the upper joint body, the two groups of optical cable steel wire rivet holes are distributed on both sides of the optical cable hole, the optical cable clamping hole is connected with the optical cable hole and the two groups of optical cable steel wire rivet holes, the optical cable hole runs through the upper joint body, a sealing assembly is arranged at one end of the upper joint body close to the outer shell, a sealing cabin is arranged in the outer shell, and a balancing piston is arranged in the sealing cabin.

[0006] Preferably, a sealing ring groove is provided on the outer wall of the upper joint body for assembling the sealing ring, and the outer shell is sealed by the sealing ring after being sleeved onto the upper joint body.

[0007] Preferably, top screw holes are provided on the two groups of optical cable steel wire riveting holes for fixing the optical cable steel wires by top screws.

[0008] Preferably, a threaded buckle is provided at one end of the upper connector body close to the shell, wherein a conical surface is provided at the edge of the optical cable hole in the threaded buckle, the sealing assembly is threadedly connected to the threaded buckle, and the internal seal of the sealing assembly is under pressure on the conical surface.

[0009] Furthermore, the sealing assembly includes two groups of conical sealing blocks and nuts, wherein the two groups of conical sealing blocks are connected and placed in the nuts in sequence, and the nuts are threadedly connected to the threaded buckles, wherein a group of conical sealing blocks close to the conical surface is arranged tightly against the conical surface, and the two groups of conical sealing blocks are provided with through holes, which are connected to the optical cable holes.

[0010] Preferably, a first sealing groove is provided on the outer surface of the balancing piston, a sealing ring is sleeved on the first sealing groove, and the balancing piston is sealed in the sealing chamber by the sealing ring.

[0011] Preferably, a sealing grease filling hole and a sealing top screw hole are sequentially provided in the balancing piston along the radial direction, the sealing grease filling hole is filled with sealing grease, and the sealing top screw is installed in the sealing top screw hole.

[0012] Furthermore, a second sealing groove is provided on the sealing top screw; a sealing ring is sleeved in the second sealing groove to close the flow of sealing grease with the outside; an open groove is provided at the end of the sealing top screw for fixing with a balancing piston through a tool.

[0013] Preferably, a thread is provided on a side of the plug close to the shell, and the plug is connected to the shell via the thread, and a fixing bolt hole is provided on a side of the plug away from the shell for fixed connection with the downhole casing.

[0014] Preferably, the optical cable clamping hole is coaxially arranged with the optical cable hole.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The present invention provides a packaging device for monitoring the tail end of an optical cable outside a casing. The optical cable protection clamp is assembled on an upper joint body, and the optical cable extends into the optical cable protection clamp, thereby effectively protecting the optical cable. An optical cable hole and two groups of optical cable steel wire rivet holes are arranged in the upper joint body, and the two groups of optical cable steel wire rivet holes are distributed on both sides of the optical cable hole, so that the optical cable steel wires on both sides of the optical cable are inserted into the two groups of optical cable steel wire rivet holes, thereby fixing the optical cable. The optical cable clamp hole is connected with the optical cable hole and the two groups of optical cable steel wire rivet holes, so that the optical cable can be easily protected after the optical cable and the optical cable steel wire are peeled off. A sealing component is arranged at one end of the upper joint body close to the outer shell, thereby effectively sealing the optical cable and preventing the pressure in the well from damaging the sensing optical cable. A sealing cabin is arranged in the outer shell, and the sealing cabin effectively isolates the external oil, gas and water. A balancing piston is arranged in the sealing cabin to ensure that the pressure in the sealing cabin is balanced with the external pressure.

[0017] Furthermore, a sealing ring groove is provided on the outer wall of the upper joint body for assembling a sealing ring. After the outer shell is sleeved on the upper joint body, it is sealed by the sealing ring, thereby improving the sealing between the upper joint body and the outer shell, protecting the optical cable inside the upper joint body and the outer shell, and preventing the pressure in the well from causing damage to the sensing optical cable.

[0018] Furthermore, top screw holes are provided on the two groups of optical cable wire riveting holes for fixing the optical cable wires by top screws, thereby fixing the optical cable wires and improving the stability of the optical cable in the upper connector body and the outer shell.

[0019] Furthermore, a threaded buckle is provided at one end of the upper connector body close to the outer shell, wherein a conical surface is provided at the edge of the optical cable hole in the threaded buckle, the sealing component is threadedly connected to the threaded buckle, and the internal seal of the sealing component is pressed on the conical surface, thereby improving the connection stability between the upper connector body and the threads of the sealing component. At the same time, a conical surface is provided at the edge of the optical cable hole in the threaded buckle, and the internal seal of the sealing component is pressed on the conical surface, thereby ensuring the sealing between the upper connector body and the threads of the sealing component.

[0020] Furthermore, the sealing assembly includes two groups of conical sealing blocks and nuts, wherein the two groups of conical sealing blocks are connected and placed in the nuts in sequence, and the nuts are threadedly connected to the threaded buckles, wherein a group of conical sealing blocks close to the conical surface is arranged closely to the conical surface, thereby ensuring the sealing between the upper joint body and the sealing assembly thread, improving the protection of the optical cable, and preventing the pressure in the well from damaging the sensing optical cable; the two groups of conical sealing blocks are provided with through holes, which are connected to the optical cable holes, so that the optical cable can pass through the through holes and extend into the outer casing.

[0021] Furthermore, a first sealing groove is provided on the outer surface of the balancing piston, a sealing ring is sleeved on the first sealing groove, and the balancing piston is sealed in the sealing chamber through the sealing ring, thereby ensuring the sealing performance between the balancing piston and the sealing chamber.

[0022] Furthermore, a sealing grease filling hole and a sealing top screw hole are sequentially arranged in the radial direction in the balancing piston. Sealing grease is filled in the sealing grease filling hole, and a sealing top screw is installed in the sealing top screw hole, thereby improving the sealing performance of the sealing cavity in the housing and facilitating the protection of the optical cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an overall schematic diagram of the packaging device in the present invention;

[0024] Figure 2 It is a schematic diagram of the main structure of the upper joint in the present invention;

[0025] Figure 3 It is a schematic diagram of the shell structure in the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the balancing piston in the present invention;

[0027] Figure 5 It is a schematic diagram of the sealing top screw structure in the present invention;

[0028] Figure 6 is a side view of the balancing piston of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the sealing component in the present invention;

[0030] Figure 8 This is a schematic diagram of the plug structure in the present invention;

[0031] In the figure: 1-upper connector body; 2-optical cable protection clamp; 3-optical cable wire rivet hole; 4-optical cable hole; 5-top screw hole; 6-sealing ring groove; 7-thread buckle-8-sealing assembly; 9-conical sealing block; 10-nut; 11-housing; 12-sealing compartment; 13-balance piston; 14-plug; 15-fixing bolt hole; 16-conical surface; 17-thread; 18-first sealing groove; 19-sealing grease filling hole; 20-sealing top screw hole; 21-sealing top screw; 22-second sealing groove; 23-opening groove; 24-optical cable clamp hole. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0034] The purpose of the present invention is to provide a packaging device for the tail end of an external casing monitoring optical cable to solve the technical problem that the sealing pressure bearing performance does not meet the long-term working requirements, the pressure in the well will damage the sensing optical cable, accelerate hydrogen loss, and reduce the service life of the optical cable.

[0035] See also Figure 1 , Figure 2 and Figure 3In one embodiment of the present invention, a packaging device for monitoring the tail end of an optical cable outside a casing is provided, comprising an upper joint body 1, an optical cable protection clamp 2 and an outer shell 11, wherein the optical cable protection clamp 2 is assembled at one end of the upper joint body 1, one end of the outer shell 11 is sleeved at the other end of the upper joint body 1, a plug 14 is arranged at the other end of the outer shell 11, an optical cable clamp hole 24 is opened in the optical cable protection clamp 2, an optical cable hole 4 and two groups of optical cable steel wire rivet holes 3 are arranged in the upper joint body 1, the two groups of optical cable steel wire rivet holes 3 are distributed on both sides of the optical cable hole 4, the optical cable clamp hole 24 is connected with the optical cable hole 4 and the two groups of optical cable steel wire rivet holes 3, wherein the optical cable clamp hole 24 is coaxially arranged with the optical cable hole 4; the optical cable hole 4 is arranged through the upper joint body 1, a sealing assembly 8 is arranged at one end of the upper joint body 1 close to the outer shell 11, a sealing cabin 12 is arranged in the outer shell 11, and a balancing piston 13 is arranged in the sealing cabin 12.

[0036] Specifically, a sealing ring groove 6 is provided on the outer wall of the upper joint body 1 for assembling a sealing ring. The outer shell 11 is sealed by the sealing ring after being sleeved on the upper joint body 11, thereby improving the sealing between the upper joint body and the outer shell, protecting the optical cable inside the upper joint body and the outer shell, and preventing the pressure in the well from damaging the sensing optical cable.

[0037] Specifically, top screw holes 5 are provided on the two groups of optical cable wire riveting holes 3 for fixing the optical cable wires by top screws, thereby fixing the optical cable wires and improving the stability of the optical cable in the upper connector body and the housing.

[0038] Specifically, a threaded buckle 7 is provided at one end of the upper joint body 1 close to the outer shell 11, wherein a conical surface 16 is provided at the edge of the optical cable hole 4 in the threaded buckle 7, and the sealing component 8 is threadedly connected to the threaded buckle 7, and the internal seal of the sealing component 8 is pressed on the conical surface 16, thereby improving the connection stability between the upper joint body and the sealing component thread. At the same time, a conical surface is provided at the edge of the optical cable hole in the threaded buckle, and the internal seal of the sealing component is pressed on the conical surface, thereby ensuring the sealing between the upper joint body and the sealing component thread.

[0039] Among them, according to Figure 7 As shown, the sealing assembly 8 includes two groups of conical sealing blocks 9 and nuts 10, wherein the two groups of conical sealing blocks 9 are sequentially connected and placed in the nuts 10, and the nuts 10 are threadedly connected to the threaded buckle 7, wherein a group of conical sealing blocks 9 close to the conical surface 16 is closely arranged with the conical surface 16, thereby ensuring the sealing between the upper joint body and the thread of the sealing assembly, improving the protection of the optical cable, and preventing the pressure in the well from damaging the sensing optical cable; the two groups of conical sealing blocks 9 are provided with through holes, and the through holes are connected with the optical cable hole 4, so that the optical cable can pass through the through holes and extend into the outer casing.

[0040] Specifically, according to Figure 4As shown, a first sealing groove 18 is provided on the outer surface of the balancing piston 13, and a sealing ring is sleeved on the first sealing groove 18. The balancing piston 13 is sealed in the sealing chamber 12 through the sealing ring, thereby ensuring the sealing between the balancing piston and the sealing chamber.

[0041] Specifically, according to Figure 6 As shown, a sealing grease filling hole 19 and a sealing top screw hole 20 are sequentially provided in the balancing piston 13 along the radial direction. The sealing grease filling hole 19 is filled with sealing grease, and the sealing top screw 21 is installed in the sealing top screw hole 20 .

[0042] Among them, according to Figure 5 As shown, a second sealing groove 22 is provided on the sealing top screw 21; a sealing ring is sleeved in the second sealing groove 22 to close the flow of sealing grease with the outside; an open groove 23 is provided at the end of the sealing top screw 21 to be fixed to the balance piston 13 by a tool.

[0043] Specifically, according to Figure 8 As shown, a thread 17 is provided on one side of the plug 14 close to the housing 11, and the plug 14 is connected to the housing 11 through the thread 17. A fixing bolt hole 15 is provided on one side of the plug 14 away from the housing 11 for fixing the plug 14 with the downhole casing.

[0044] The present invention is applied to the construction of outer sheath optical cables. The method of the present invention is adopted and the construction is carried out according to the process of the present invention, which can effectively prevent the complex environment inside the wellbore of oil, gas and water wells during the construction of the outer sheath optical cable, and the sealing pressure-bearing performance does not meet the long-term working requirements. The pressure in the well will cause damage to the sensor optical cable, accelerate hydrogen loss, and reduce the service life of the optical cable.

[0045] In summary, the present invention provides a packaging device for monitoring the tail end of an optical cable outside a casing, wherein an optical cable protection clamp is assembled on an upper joint body, and the optical cable is inserted into the optical cable protection clamp, thereby effectively protecting the optical cable; an optical cable hole and two groups of optical cable steel wire rivet holes are arranged in the upper joint body, and the two groups of optical cable steel wire rivet holes are distributed on both sides of the optical cable hole, so that the optical cable steel wires on both sides of the optical cable are inserted into the two groups of optical cable steel wire rivet holes, thereby fixing the optical cable; the optical cable clamping hole is connected with the optical cable hole and the two groups of optical cable steel wire rivet holes, so that the optical cable is easily protected after the optical cable and the optical cable steel wire are peeled off; a sealing component is arranged at one end of the upper joint body close to the outer shell, thereby effectively sealing the optical cable and preventing the pressure in the well from damaging the sensing optical cable; a sealed cabin is arranged in the outer shell, and the sealed cabin effectively isolates the external oil, gas and water; a balancing piston is arranged in the sealed cabin to ensure that the pressure in the sealed cabin is balanced with the external pressure.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A packaging device for monitoring the tail end of an optical cable outside a casing, characterized in that: The invention comprises an upper connector body (1), an optical cable protection clamp (2) and an outer shell (11), wherein the optical cable protection clamp (2) is assembled on one end of the upper connector body (1), one end of the outer shell (11) is sleeved on the other end of the upper connector body (1), a plug (14) is arranged on the other end of the outer shell (11), an optical cable clamping hole (24) is arranged in the optical cable protection clamp (2), and an optical cable hole (4) and two sets of optical cable steel wire riveting holes are arranged in the upper connector body (1). The optical cable hole (4) is provided with a sealing assembly (8), and two groups of optical cable steel wire rivet holes (3) are distributed on both sides of the optical cable hole (4). The optical cable clamping hole (24) is connected with the optical cable hole (4) and the two groups of optical cable steel wire rivet holes (3). The optical cable hole (4) is arranged through the upper joint body (1). A sealing assembly (8) is arranged at one end of the upper joint body (1) close to the outer shell (11). A sealing cabin (12) is arranged in the outer shell (11), and a balancing piston (13) is arranged in the sealing cabin (12).

2. A packaging device for monitoring the tail end of an optical cable outside a casing according to claim 1, characterized in that: The outer wall of the upper joint body (1) is provided with a sealing ring groove (6) for assembling a sealing ring, and the outer shell (11) and the upper joint body (11) are sealed by the sealing ring after being sleeved.

3. The packaging device for monitoring the tail end of an optical cable outside a casing according to claim 1, characterized in that: Top screw holes (5) are arranged on the two groups of optical cable steel wire riveting holes (3) for fixing the optical cable steel wires through top screws.

4. The packaging device for monitoring the tail end of an optical cable outside a casing according to claim 1, characterized in that: A threaded buckle (7) is provided at one end of the upper joint body (1) close to the outer shell (11), wherein a conical surface (16) is provided at the edge of the optical cable hole (4) in the threaded buckle (7), and the sealing component (8) is threadedly connected to the threaded buckle (7), and the internal seal of the sealing component (8) is pressed on the conical surface (16).

5. The packaging device for monitoring the tail end of an optical cable outside a casing according to claim 4, characterized in that: The sealing assembly (8) comprises two groups of conical sealing blocks (9) and nuts (10), wherein the two groups of conical sealing blocks (9) are sequentially connected and placed in the nuts (10), and the nuts (10) are threadedly connected to the thread buckle (7), wherein a group of conical sealing blocks (9) close to the conical surface (16) is closely arranged with the conical surface (16), and the two groups of conical sealing blocks (9) are provided with through holes, and the through holes are connected with the optical cable hole (4).

6. The packaging device for monitoring the tail end of an optical cable outside a casing according to claim 1, characterized in that: The outer surface of the balancing piston (13) is provided with a first sealing groove (18), a sealing ring is sleeved on the first sealing groove (18), and the balancing piston (13) is sealed in the sealing chamber (12) through the sealing ring.

7. The packaging device for monitoring the tail end of an optical cable outside a casing according to claim 1, characterized in that: The balancing piston (13) is provided with a sealing grease filling hole (19) and a sealing top screw hole (20) in sequence along the radial direction. The sealing grease filling hole (19) is filled with sealing grease, and the sealing top screw (21) is installed in the sealing top screw hole (20).

8. The packaging device for monitoring the tail end of an optical cable outside a casing according to claim 7, characterized in that: The sealing top screw (21) is provided with a second sealing groove (22); a sealing ring is sleeved in the second sealing groove (22) for closing the flow of sealing grease with the outside; an open groove (23) is provided at the end of the sealing top screw (21) for fixing with a balancing piston (13) by means of a tool.

9. The packaging device for monitoring the tail end of an optical cable outside a casing according to claim 1, characterized in that: A thread (17) is provided on a side of the plug (14) close to the housing (11), and the plug (14) is connected to the housing (11) via the thread (17); a fixing bolt hole (15) is provided on a side of the plug (14) away from the housing (11) for fixing the plug with a downhole casing.

10. The packaging device for monitoring the tail end of an optical cable outside a casing according to claim 1, characterized in that: The optical cable clamping hole (24) is coaxially arranged with the optical cable hole (4).

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