CN113097796B - Wet interfacing apparatus of cable in pit - Google Patents
Wet interfacing apparatus of cable in pit Download PDFInfo
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- CN113097796B CN113097796B CN202110476364.7A CN202110476364A CN113097796B CN 113097796 B CN113097796 B CN 113097796B CN 202110476364 A CN202110476364 A CN 202110476364A CN 113097796 B CN113097796 B CN 113097796B
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- 210000001503 joint Anatomy 0.000 claims abstract description 36
- 238000003032 molecular docking Methods 0.000 claims abstract description 31
- 230000001681 protective effect Effects 0.000 claims abstract description 21
- 238000003780 insertion Methods 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 14
- 238000000605 extraction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
Landscapes
- Earth Drilling (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention relates to the technical field of oil extraction equipment, in particular to an underground cable wet butt joint device, which comprises a first plug assembly and a second plug assembly, wherein the first plug assembly is connected with the second plug assembly; the first plug assembly includes: a first body; the first plug terminal seat is arranged on the first main body; the first main body is provided with a plug-in column; the plug-in column is internally provided with a contact; the first guide member is disposed on the first body; the first centralizer is arranged on the first main body; the second plug assembly includes: a second body; the second main body is internally provided with a butt joint channel; the docking channel is capable of receiving the first body therethrough; one end of the second main body is provided with a protective cover; the second guide member is arranged on the second main body and can be matched with the first guide member; the second centralizer is arranged on the second main body; the second plug terminal seat is arranged on the second main body, and the second plug terminal seat is provided with a contact pin: the contact pin can be inserted on the insertion column. By adopting the invention, the underground cable can be conveniently butted, and the operation efficiency is improved.
Description
Technical Field
The invention relates to the technical field of oil extraction equipment, in particular to an underground cable wet butt joint device.
Background
In the current processes of oilfield logging operation at home and abroad, oil extraction operation using an electric submersible pump lifting technology and the like, most of electromechanical equipment and electric instruments are put into the well by adopting a mode that a cable clamp is used for binding a cable to the outer wall of an outer protection pipe, and the cable and the electromechanical equipment are put into the well together with the outer protection pipe. In construction, the cable is connected with the submersible electric pump or the test production logging instrument, then the cable is straightened and clung to the outer protection pipe wall, the cable and the outer protection pipe are tightly bound together by the cable clamp, the cable enters the well along with the binding of one section of the outer protection pipe, the operation procedure is quite complex, and the efficiency is low. In the process of lifting and lowering the outer protective tube, the time and the labor are wasted when the clamp is required to be broken and detached, and when the well bevel angle is met, the well section with larger azimuth angle change is in loose contact with the outer wall of the outer protective tube, or the cable is easy to rub and squeeze between the outer wall of the outer protective tube and the inner wall of the sleeve to collide, so that the cable is damaged, equipment and the cable are required to be completely lifted out after the cable is damaged, the brand new cable is replaced again to enter the well, the cost is increased, and the operation efficiency is influenced.
Disclosure of Invention
In view of the above, the invention provides a wet docking device for underground cables, which is mainly aimed at facilitating the docking of underground cables and improving the working efficiency.
In order to achieve the above purpose, the present invention mainly provides the following technical solutions:
The embodiment of the invention provides a downhole cable wet docking device, which comprises a first plug assembly and a second plug assembly;
The first plug assembly is capable of interfacing with the second plug assembly;
the first plug assembly includes: a first body, a first plug end mount, a first guide member, and a first centralizer;
The first plug terminal seat is arranged on the first main body; the first main body is provided with a plug-in column; the plug-in column is internally provided with a contact; one end of the first main body is provided with a plugging channel; a sealing plug is arranged at one end of the plugging channel; the sealing plug is capable of being pierced; the plugging channel is filled with insulating liquid I;
the first plug terminal seat can be connected with a first cable to be connected;
The first guide member is provided on the first body;
the first centralizer is arranged on the first main body;
the second plug assembly includes: a second body, a second guide member, a second centralizer, and a second plug terminal;
The second main body is internally provided with a butt joint channel; the docking channel is capable of receiving the first body therethrough;
One end of the second main body is provided with a protective cover; the protective cover can seal one end of the butt joint channel; the shield is capable of being pierced; the butt joint channel is filled with insulating liquid II;
The second guide member is arranged on the second main body and can be matched with the first guide member to guide the first main body to move along a preset direction;
the second centralizer is arranged on the second main body;
the second plug terminal seat is arranged on the second main body, and a plug pin is arranged on the second plug terminal seat: the contact pin can be inserted on the insertion column; the second plug end seat can be connected with a second cable to be connected.
Further, the plug-in posts are arranged corresponding to the plug-in channels;
The plugging end of the plugging column extends to the plugging channel;
the first insulating liquid is insulating oil.
Further, the first guide member is a guide protrusion; the guide projection is disposed outside the first body.
Further, the second guide member includes: a guide channel; the guide channel is capable of accommodating the first body therethrough; the guide channel is provided with a guide groove; the guide groove is matched with the guide protrusion and can guide the guide protrusion to move along a preset direction.
Further, the second plug terminal seat is arranged at one end of the second main body and is positioned at the outer side of the butt joint channel; the pins extend into the docking channel.
Further, a support flange is arranged on the second plug terminal seat; the support flange is provided with an oil passage through hole.
Further, the first centralizer is an elastic centralizer.
Further, the first centralizer includes: the device comprises a centralizing main body, a limiting member and an elastic member;
The righting body is fixedly arranged on the first body;
the limiting component is sleeved on the centralizing main body and can slide relative to the centralizing main body;
The elastic component is arranged between the limiting component and the righting main body; the stop member is capable of being blocked by the second plug assembly to prevent the stop member from passing through the docking channel.
Further, the method further comprises the following steps: a third body;
the third main body is of a straight pipe structure; the third main body and the first main body are coaxially arranged;
the first cable to be connected sequentially passes through the third main body and the first main body to be connected to the first plug terminal seat;
the third main body is provided with a taper clamp, and the taper clamp is arranged between the first cable to be connected and the third main body;
a cable packer is arranged on the third main body; the cable packer is arranged between the first cable to be connected and the third main body.
Further, the lower end of the second main body is provided with an equipment connecting component for hanging equipment to be docked;
And the plug-in column is provided with a self-locking contact.
By means of the technical scheme, the underground cable wet butt joint device has at least the following advantages:
The underground cable is convenient to butt joint, and the operation efficiency is improved.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a first plug assembly and a second plug assembly in a wet docking device for a downhole cable according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating the cooperation between the first body and the first guiding member in the first plug assembly.
The figure shows:
1 is a first main body, 2 is a first plug end seat, 2-1 is a contact, 2-2 is a plugging channel, 2-3 is a sealing plug, 3 is a first guide member, 4 is a first centralizer, 4-1 is a centralizing main body, 4-2 is a limiting member, 4-3 is an elastic member, 5 is a second main body, 6 is a second centralizer, 6-1 is a supporting opening, 7 is a second guide member, 8 is a second plug end seat, 8-1 is a plug pin, 8-2 is a supporting flange, 9 is a protective cover, 10 is an outer protective tube, 11 is a cable to be connected second, 12 is an end seat sealing element, 13 is an equipment connecting member, 14 is a third main body, 15 is a cable packer, 16 is a taper card, 17 is a cable to be connected first, and 18 is an inner cavity.
Detailed Description
In order to further describe the technical means and effects adopted for achieving the preset aim of the invention, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the application of the invention with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
As shown in fig. 1 and 2, a downhole cable wet docking apparatus according to an embodiment of the present invention includes a first plug assembly and a second plug assembly; the first plug assembly can be in butt joint with the second plug assembly, and the first plug assembly and the second plug assembly are conducted to transmit power and signals;
The first plug assembly includes: a first main body 1, a first plug terminal 2, a first guide member 3, and a first centralizer 4; the first plug terminal 2 is provided on the first main body 1; in this embodiment, the first plug terminal 2 is preferably fixedly disposed on the first body 1 by threaded connection; of course, the first plug terminal 2 may be fixed to the first body 1 by welding; of course, the first plug terminal 2 may be limited to a predetermined position in the first body 1 by a limiting structure. The first main body 1 is provided with a plug-in column; the plug-in column is internally provided with a contact; the contact communicates with the first plug terminal 2 and is further capable of communicating with the first cable to be connected. One end of the first main body 1 is provided with a plugging channel 2-2; one end of the plugging channel 2-2 is provided with a sealing plug 2-3; the sealing plug 2-3 can be pierced; the plugging channel 2-2 is filled with insulating liquid I; preferably an insulating oil.
The plug post is arranged at one end of the first plug terminal seat 2 and is used for matching with the plug pin 8-1 so as to conduct power and signals; 1 or more plug-in columns; when the number of the plug-in posts is 1, the body of the plug-in post is a first main body 1; the first body 1 is preferably of tubular construction to facilitate insertion into the second body 5; of course, the first main body 1 may also have a hollow cavity structure with a polygonal outer wall; the cavity structure is used as a plugging channel. When the number of the plug-in posts is multiple, the plug-in posts are distributed on the first main body 1 and fixedly arranged with the first main body 1; the present embodiment is preferably integrally provided. The number of 1, 2, 3, 4, etc. can be selected and set according to the needs. The plug posts are preferably of a high temperature, high pressure, corrosion resistant insulating material to ensure isolation and insulation between the pins 8-1. The first plug terminal seat 2 can fix the first main body 1, and plays a sealing and isolating role when a cable passes through the first plug terminal seat 2 and is connected with the contact 2-1 of the plug post, and plays an inner and outer sealing and isolating role when an external cable enters the plug, so that external liquid is prevented from entering the plug.
The first plug terminal seat 2 can be connected with a first cable 17 to be connected; the first cable 17 to be connected may be an external cable or a cable capable of being connected with an external cable.
The first guide member 3 is provided on the first body 1; the first guide member 3 is fixedly connected with the first main body 1; in order to cooperate with the second guiding component 7 in the process of the first main body 1 entering the well, so as to ensure that each plugging column is plugged accurately and orderly. In this embodiment, the first guide member 3 is preferably a guide projection; the guide projection is provided on the outer side of the first body 1. The guide bulge is fixedly arranged on the first main body 1; in this embodiment, the guide protrusion is preferably a guide key, and the guide key is welded on the first body 1; the guide key may be provided integrally with the first body 1. At least 1 guide key is provided; the present embodiment preferably has 1 guide key to facilitate matching the guide key with the second guide member 7. The first guide member 3 ensures a centered ordering of the plurality of pins with the plurality of pins 8-1 when electrically connected.
The first centralizer 4 is arranged on the first main body 1; in this embodiment, the first centralizer 4 is preferably a resilient centralizer to cushion contact pin 8-1 as it is inserted into the plug post. Further preferably, the first centralizer 4 includes: a righting main body 4-1, a limit member 4-2 and an elastic member 4-3; the righting body 4-1 is fixedly arranged on the first body 1; the limiting component 4-2 is sleeved on the righting main body 4-1 and can slide relative to the righting main body 4-1; the limiting member 4-2 is in a circular shape; the lower end of the limiting member 4-2 can be attached to the upper end of the second plug assembly, and the end of the docking channel can be closed. After the first plug assembly and the second plug assembly are in butt joint, the limiting member 4-2 seals the upper end of the butt joint channel by the limiting member 4-2.
The elastic component 4-3 is arranged between the limiting component 4-2 and the righting main body 4-1; the elastic member 4-3 is a spring. The stop member 4-2 can be blocked by the second plug assembly to prevent the stop member 4-2 from passing through the docking channel.
The second plug assembly includes: a second main body 5, a second guide member 7, a second centralizer 6, and a second plug terminal 8; the second main body 5 is provided with a butt joint channel; the docking channel is capable of receiving the first body 1 therethrough; one end of the second body 5 is provided with a protective cover 9; the protective cover 9 can seal one end of the butt joint channel, and insulating liquid II is filled in the butt joint channel; the insulating liquid II is preferably insulating oil. The insulating liquid II and the insulating liquid I may be the same or different. The shield 9 can be pierced to pierce the shield 9 through when the first body 1 is squeezed. The shield may also be of rubber or latex material.
After the butt joint channel is closed by the protective cover 9, a closed inner chamber 18 is formed between the second centralizer 6 and the second plug terminal seat 8; the inner chamber 18 is filled with insulating oil.
As the first body 1 enters the second body 5, the shield 9 is pierced, the first body 1 passes through the shield 9, into the second body 5; before the first main body 1 does not enter, the protective cover 9 is arranged on the butt joint channel in a sealing way, so that the butt joint channel is sealed. The inner chamber 18 is protected from debris during the logging of the first and second plug assemblies. Of course, the protective cover 9 can also be replaced by a protective plug. The shield 9 is preferably of resilient construction in this embodiment. It is further preferred that the shield 9 is of elastomeric membrane construction in a position corresponding to the docking channel to facilitate penetration and sealing.
The second guide member 7 is provided on the second body 5, and is capable of cooperating with the first guide member 3 to guide the first body 1 to move in a predetermined direction; in this embodiment, the second guide member 7 preferably includes: a guide channel; the guide channel is capable of receiving the first body 1 therethrough; the guide channel is provided with a guide groove; the guide groove is matched with the guide protrusion, and can guide the guide protrusion to move along a preset direction, so that the plug post on the first plug terminal seat 2 on the first main body 1 can be kept in a preset position and corresponds to the plug pin 8-1 on the second plug terminal seat 8.
The second centralizer 6 is arranged on the second main body 5 to centralize the second plug terminal seat 8 and the second cable 11 to be connected, so that excessive offset is avoided. The main body of the second centralizer 6 is of a cylindrical structure; the upper end of the cylinder structure is provided with a supporting opening 6-1; the support opening 6-1 is flared and is capable of guiding the first body 1 through the second centralizer 6.
The second plug terminal seat 8 is arranged on the second main body 5, and the second plug terminal seat 8 is provided with a plug pin 8-1: the second plug terminal seat 8 fixes the plug pins 8-1; the contact pin 8-1 can be inserted into the insertion column; the second plug terminal 8 can be connected to the second cable to be connected 11. The second cable 11 to be connected is connected to the second plug terminal 8, and a terminal seat sealing member 12 is connected between the second cable 11 to be connected and the second plug terminal 8, and is used for sealing and isolating the inner cavity 18 from the outside, so that external liquid is prevented from entering the inner cavity 18, and the tightness between the second cable 11 to be connected and the second plug terminal 8 is ensured. The inner chamber 18 is a butt joint chamber of the plug-in post and the pin 8-1, and the chamber is filled with insulating oil, so that an electric insulation effect is achieved after butt joint is completed.
Pin 8-1 is conductive to the second cable 11 to be connected. An internal chamber 18 is formed between the second plug terminal 8 and the second centralizer 6 to accommodate the insertion of the first body 1.
In use, the first plug assembly is typically selected to connect with the first cable 17 to be connected on the well; the second plug assembly is connected with a second cable to be connected 11 in the pit; the second cable 11 to be connected can be an independent cable and is connected with underground equipment through the independent cable; the second cable 11 to be connected is also a self-contained cable of the downhole device. In use, it is preferred that the first plug assembly be inserted into the second plug assembly from top to bottom. Of course, the first plug assembly may be selected to be downhole, the second plug assembly may be selected to be uphole, and the second plug assembly may be plugged into the first plug assembly.
The underground cable wet butt joint device provided by the embodiment of the invention is convenient for the underground cable butt joint and improves the operation efficiency.
Preferably, one end of the first body 1 is provided with a plugging channel 2-2; the plugging channel 2-2 can guide the plugging column to be in butt joint with the pin 8-1; the contact 2-1 is arranged corresponding to the plugging channel 2-2; when the number of the contacts 2-1 is plural, the number of the plugging channels 2-2 is plural; the plugging channels 2-2 are arranged in one-to-one correspondence with the contacts 2-1. The plug end of the contact 2-1 extends to the plug channel 2-2; one end of the plugging channel 2-2 is provided with a sealing plug 2-3; the plugging channel 2-2 is filled with insulating oil, and electrical isolation and insulation are kept before and after plugging. The sealing plug 2-3 can be pierced. The sealing plug 2-3 is used for sealing the plugging channel 2-2 to prevent the insulating oil in the plugging channel 2-2 from leaking out and external liquid from entering the plugging channel 2-2.
The sealing plug 2-3 can seal one end of the plugging channel 2-2; when the contact pin 8-1 enters the plugging channel 2-2, the sealing plug 2-3 is pierced, and the contact pin 8-1 passes through the sealing plug 2-3 and enters the plugging channel 2-2 so as to be plugged on the plugging column; before the contact pin 8-1 does not enter the plugging channel 2-2, the sealing plug 2-3 is arranged on the plugging channel 2-2 in a sealing way, so that the plugging channel 2-2 is sealed. Of course, the sealing plug 2-3 may be replaced by a sealing cap. The preferred sealing plug 2-3 of this embodiment is of a resilient construction. It is further preferred that the sealing plug 2-3 is of an elastic membrane structure at a position corresponding to the plugging channel 2-2 to facilitate piercing and sealing.
The present embodiment preferably has the first plug terminal 2 fixedly provided on the inner wall of the first body 1. The first plug terminal seat 2 can be locked on the first main body 1 through threaded connection; of course, the fixing may be performed by welding.
As a preferable example of the above embodiment, the second plug terminal 8 is provided at one end of the second body 5, outside the docking channel; the pin 8-1 extends into the docking channel to seal the pin 8-1. The second plug terminal 8 is fixed to the second body 5 by screwing or welding, although other means of fixing, such as gluing, are not excluded.
As a preferable example of the above embodiment, the second plug terminal seat 8 is provided with a support flange 8-2; the support flange 8-2 can be supported on the inner wall of the outer sheath 10 to ensure the position of the second body 5 within the outer sheath 10. The support flange 8-2 has oil passage holes therein to maintain the fluidity of the oil in the outer tube 10. The second body 5 is restrained to the center of the outer tube 10 by the support flange 8-2, with the first body 1 being abutted with the second body 5.
As a preference of the foregoing embodiments, one embodiment of the present invention provides a downhole cable wet docking apparatus, further including: a third body 14; the third body 14 is of straight tube construction; the third body 14 is arranged coaxially with the first body 1; the third body 14 may be integrally provided with the first body 1; the third main body 14 and the first main body 1 are the same pipeline, which is beneficial to processing and has reliable structure. Of course, the third body 14 and the first body 1 may be provided independently. The third body 14 and the first body 1 are connected to the first centralizer 4, respectively. The third body 14 is preferably fixed to the upper portion of the first centralizer 4; the first body 1 is fixed to the lower portion of the first centralizer 4.
The first cable 17 to be connected sequentially passes through the third main body 14 and the first main body 1 to be connected to the first plug terminal seat 2; the first cable 17 to be connected may be an external total cable or an independent cable, and is fixedly arranged on the first body 1. The first cable 17 to be connected is preferably an armoured load cable which can bear large longitudinal tensile force besides transmitting power and signals, and the tensile force is transmitted to the first plug assembly through the cone clamp 16 during the lifting process; the armored load-bearing cable passes through the cable packer 15 after being fastened by the taper clamp 16, and is electrically connected with the contact 2-1 on the plug post through the first plug end seat 2.
The third main body 14 is provided with a taper clamp 16, and the taper clamp 16 is arranged between the first cable 17 to be connected and the third main body 14 and is used for fastening cable steel armor, bearing the weight of the first plug assembly in the wet butt joint process and transmitting ground tension to the first plug assembly in the well lifting process.
The third main body 14 is provided with a cable packer 15; a cable packer 15 is arranged between the cable one 17 to be connected and the third body 14 to seal off the cable.
As a preference of the above embodiment, the lower end of the second body 5 is provided with a device connecting member 13 for hooking the device to be docked so as to maintain the distance of the second body 5 from the device to be docked, preventing pulling from occurring. The plug-in post is provided with a self-locking contact to lock the contact pin 8-1, so that the reliability of connection is improved. The self-locking contact is preferably a U-shaped self-locking contact for electrical connection of a cable and a plug. The device connecting member 13 is preferably a hook-like structure or a loop-like structure.
Preferably, the second plug assembly further includes: an outer sheath 10; the second plug terminal 8 and/or the second body 5 are fixedly disposed on the inner wall of the outer sheath 10. Can be fixed by welding or by a locking piece. Preferably, the upper end of the outer protective tube 10 is provided with an outer protective tube 10 connector to facilitate the butt joint with other outer protective tubes 10.
The shield 9 may be located at the end of the inner chamber 18, and the second centralizer 6 may be located in the inner chamber 18, so that when the first plug assembly passes through the shield 9, the first centralizer 4 may cooperate with the second centralizer 6 to ensure that the first body is coaxial within the inner chamber while sealing the shield 9, and when the pin 8-1 of the second body 5 contacts the self-locking contact of the first body 1, the spring 4-3 of the first centralizer 4 may act as a buffer.
The underground cable wet butt joint device provided by the embodiment of the invention solves the problems that cables are easy to damage and the cable lifting and lowering operations are complicated in the processes of oil extraction, oil testing and well logging. And electric energy, signals and the like are transmitted to underground electromechanical equipment through the wet-process docking plug, so that normal operation and signal transmission of all the electromechanical equipment are realized.
According to the underground cable wet butt joint device provided by one embodiment of the invention, the mode that the conventional cable equipment is put into the well together with the cable is changed, the electromechanical equipment is put down first, after the electromechanical equipment reaches a preset position to be fixed, the cable with the plug-in assembly is put into the well in compliance with the outer protection pipe 10, and the wet butt joint device is adopted underground to link the cable. On the one hand, the difficulty of well entry construction is reduced, the construction amount of field personnel is reduced, and well entry auxiliary materials are saved. On the other hand, the electromechanical equipment is well-plugged, so that the well-plugging speed is greatly improved, the time cost is saved, the damage caused by cable wiping and squeezing and collision is avoided, and the problems that the expensive cable is easy to damage, the whole cable is scrapped after damage, and the cable cannot be reused are solved. Because the cable is put into the pipe in a plugging mode, the cable can be reused.
In one embodiment of the invention, a downhole cable wet docking device is provided, wherein a first plug assembly is arranged on a well, and a second plug assembly is arranged in a downhole docking process: firstly, connecting the electromechanical device of the pre-logging into the device connecting member 13 at the lower end of the second plug assembly, and electrically connecting the cable; the inner chamber 18 of the second plug assembly is filled with insulating oil, and the upper end of the inner chamber 18 is covered with a protective cover 9 after the insulating oil is filled. And then the second plug assembly is connected with the outer protective tube 10; the second plug assembly, the electromechanical device, is run into the well with the outer sheath 10 and the device lowered into place. The first plug assembly which is filled with insulating oil and sealed by the sealing plug 2-3 and the cable connected to the first plug assembly are slowly put into the well from the outer protection tube 10 through ground equipment, when the first plug assembly reaches the position of the second plug assembly, the plug post of the first plug assembly firstly enters the inner cavity 18 through the protection cover 9, under the mutual matching of the first guide member 3 and the second guide member 7, the sorting and centering of the first plug assembly and the second plug assembly is realized, when the first plug assembly passes through the second centralizer 6 of the second plug assembly, the second centralizer 6 ensures that the plug post of the first plug assembly is extruded with the plug pin 8-1 of the second plug assembly, and the plug pin 8-1 of the second plug assembly passes through the sealing plug 2-3 to be in butt joint with the contact 2-1 of the plug post, so that the electrical connection is realized, and finally the underground 'blind plug' is realized, and in the process, as the inner cavity 18 of the second plug assembly and the plug channel 2-2 of the first plug assembly are filled with insulating oil, the plug assembly is still fully isolated from the outer cavity 18 after the plug assembly passes through the second plug assembly and the plug pin 8-1 is still fully connected with the insulating oil. The connection between the wellhead cable and the uphole matched electromechanical equipment is realized.
According to the underground cable wet butt joint device provided by the embodiment of the invention, auxiliary materials for entering a well are saved, manual operation is reduced, the underground cable wet butt joint is convenient to enter the well, and the operation efficiency is improved.
Further, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with these terms only being used to distinguish one element from another. Without departing from the scope of the exemplary embodiments. Similarly, neither element nor element two is a sequence of elements only intended to distinguish one element from another element. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Standard parts used in the invention can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of all parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the details are not described.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The underground cable wet butt joint device is characterized by comprising a first plug assembly and a second plug assembly;
The first plug assembly is capable of interfacing with the second plug assembly;
the first plug assembly includes: a first body, a first plug end mount, a first guide member, and a first centralizer;
The first plug terminal seat is arranged on the first main body; the first main body is provided with a plug-in column; the plug-in column is internally provided with a contact; one end of the first main body is provided with a plugging channel; a sealing plug is arranged at one end of the plugging channel; the sealing plug is capable of being pierced; the plugging channel is filled with insulating liquid I;
the first plug terminal seat can be connected with a first cable to be connected;
The first guide member is provided on the first body;
the first centralizer is arranged on the first main body;
the second plug assembly includes: a second body, a second guide member, a second centralizer, and a second plug terminal;
The second main body is internally provided with a butt joint channel; the docking channel is capable of receiving the first body therethrough;
One end of the second main body is provided with a protective cover; the protective cover can seal one end of the butt joint channel; the shield is capable of being pierced; the butt joint channel is filled with insulating liquid II;
The second guide member is arranged on the second main body and can be matched with the first guide member to guide the first main body to move along a preset direction;
the second centralizer is arranged on the second main body;
the second plug terminal seat is arranged on the second main body, and a plug pin is arranged on the second plug terminal seat: the contact pin can be inserted on the insertion column; the second plug end seat can be connected with a second cable to be connected.
2. The downhole cable wet docking apparatus of claim 1 wherein,
The contact is arranged corresponding to the plugging channel;
the plug-in end of the contact extends to the plug-in channel;
the first insulating liquid is insulating oil.
3. The downhole cable wet docking apparatus of claim 1 wherein,
The first guide member is a guide protrusion; the guide projection is disposed outside the first body.
4. A downhole cable wet docking apparatus according to claim 3 wherein,
The second guide member includes: a guide channel; the guide channel is capable of accommodating the first body therethrough; the guide channel is provided with a guide groove; the guide groove is matched with the guide protrusion and can guide the guide protrusion to move along a preset direction.
5. The downhole cable wet docking apparatus of claim 1 wherein,
The second plug terminal seat is arranged at one end of the second main body and is positioned at the outer side of the butt joint channel; the pins extend into the docking channel.
6. The downhole cable wet docking apparatus of claim 1 wherein,
The second plug terminal seat is provided with a support flange; the support flange is provided with an oil passage through hole.
7. The downhole cable wet docking apparatus of claim 1 wherein,
The first centralizer is an elastic centralizer.
8. The downhole cable wet docking apparatus of claim 7 wherein,
The first centralizer includes: the device comprises a centralizing main body, a limiting member and an elastic member;
The righting body is fixedly arranged on the first body;
the limiting component is sleeved on the centralizing main body and can slide relative to the centralizing main body;
The elastic component is arranged between the limiting component and the righting main body; the stop member is capable of being blocked by the second plug assembly to prevent the stop member from passing through the docking channel.
9. The downhole cable wet docking apparatus of claim 1, further comprising: a third body;
the third main body is of a straight pipe structure; the third main body and the first main body are coaxially arranged;
the first cable to be connected sequentially passes through the third main body and the first main body to be connected to the first plug terminal seat;
the third main body is provided with a taper clamp, and the taper clamp is arranged between the first cable to be connected and the third main body;
a cable packer is arranged on the third main body; the cable packer is arranged between the first cable to be connected and the third main body.
10. The downhole cable wet docking apparatus of claim 1 wherein,
The lower end of the second main body is provided with an equipment connecting component for hanging equipment to be docked;
And the plug-in column is provided with a self-locking contact.
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| EP1282203B1 (en) * | 2001-07-30 | 2007-05-09 | Harting Electronics GmbH & Co. KG | Electrical connector |
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| CN110649423B (en) * | 2019-11-26 | 2020-04-03 | 上海临希智能科技有限公司 | Three-section type underwater cable passing mechanism for underground electric submersible pump |
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Effective date of registration: 20240807 Address after: No. 16-45-191, Dongjiao Road, Karamay District, Karamay City, Xinjiang Uygur Autonomous Region 834099 Patentee after: Xinjiang Baohai Technology Development Co.,Ltd. Country or region after: China Address before: No. a16-205, huifujiayuan, Karamay, Xinjiang Uygur Autonomous Region 834000 Patentee before: KARAMAY SHANGZHENG PETROLEUM TECHNOLOGY Co.,Ltd. Country or region before: China |