A connection structure of a pre-oil submersible motor and a submersible cable
By designing cable connectors and motor connectors, and adopting threaded connections and sealing structures, the problem of long connection time between submersible cables and submersible motors was solved, achieving the requirements of rapid connection and pre-filled oil structure.
Patent Information
- Application Number
- CN202211631845.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-19
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2042-12-19
AI Technical Summary
In the existing technology, the connection structure between the submersible cable and the submersible motor cannot meet the requirements of the pre-oil filling structure, and the connection process is time-consuming and cannot achieve rapid connection.
It employs cable connectors and motor connectors, including components such as cable plugs, plug insulation sleeves, cable connector sleeves, sealing sleeves, socket insulation sleeves, motor sockets, and motor plugs, to achieve rapid connection between cables and motors through threaded connections and sealing structures.
It enables rapid connection between cables and motors, meets the requirements of pre-lubricated structures, and improves connection efficiency.
Smart Images
Figure CN115954708B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of petroleum chemical industry, and particularly relates to a connection structure of a pre-oil submersible motor and a submersible cable. BACKGROUND
[0002] According to statistics, the global heavy oil proved reserves in 2019 were about 815 billion tons, accounting for 70% of the global remaining oil reserves, and the heavy oil reserves in the Bohai region also reached more than 85%. The steam huff and puff injection and production integration is an effective and feasible method for offshore oilfield heavy oil exploitation, and the downhole temperature of steam injection can reach about 370 DEG C. In order to make the submersible cable and the submersible motor adapt to such high downhole temperature, the submersible motor used in the steam huff and puff injection and production integration process is a pre-oil structure, and the cable and the motor can be quickly connected. When the conventional submersible cable and the submersible motor are connected, the end of the submersible cable is preformed into a cable head, the cable head is connected with the submersible motor to realize sealing and insulation. This structure and process are to inject oil into the submersible motor after connection, which cannot meet the requirements of the pre-oil structure of the submersible motor, and the time consumption is long on site, and the cable and the motor cannot be quickly connected. SUMMARY
[0003] The present application relates to the technical field of petroleum chemical industry, and particularly relates to a connection structure of a pre-oil submersible motor and a submersible cable.
[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme, which comprises: a cable connecting piece arranged at the front end of a to-be-connected cable and a motor connecting piece arranged in a motor head jack, characterized in that:
[0005] The cable connecting piece comprises:
[0006] a cable plug which is detachably connected with the end of the copper wire of the to-be-connected cable;
[0007] a plug insulation sleeve, wherein the rear part of the plug insulation sleeve is arranged at the front end of the rubber inner sheath of the to-be-connected cable, the front part of the plug insulation sleeve is provided with a first limiting circumferential edge, the inner circumferential edge of the first limiting circumferential edge is matched with the outer circumferential edge of the copper wire, and the two ends of the first limiting circumferential edge are respectively in abutment with the front end of the rubber inner sheath and the end of the cable plug; the end of the plug insulation sleeve is in abutment with the front end of the steel pipe outer sheath of the to-be-connected cable; and the front end of the plug insulation sleeve is matched with the outer circumferential edge of the cable plug;
[0008] a cable connecting sleeve which is arranged at the middle and rear part of the plug insulation sleeve, the front part of the cable connecting sleeve is matched with the outer circumferential edge of the plug insulation sleeve, and the inner circumferential edge of the rear part of the cable connecting sleeve is matched with the outer circumferential edge of the steel pipe outer sheath of the to-be-connected cable;
[0009] A sealing sleeve is sleeved on the cable to be connected and detachably connected with the end of the cable connecting sleeve, used for fixing the plug insulating sleeve on the cable to be connected;
[0010] The motor connecting piece comprises;
[0011] The socket insulating sleeve is arranged in the motor head jack, the outer periphery of the socket insulating sleeve is matched with the motor head jack, an axial inner cavity is arranged in the socket insulating sleeve, and a second limiting peripheral edge is arranged in the middle part of the inner cavity;
[0012] The motor socket is arranged in the middle part of the inner cavity, the front end of the motor socket abuts against the rear end face of the second limiting peripheral edge, a motor plug insertion hole is arranged in the front part of the motor socket, and a cable plug insertion hole is arranged in the rear part of the motor socket;
[0013] The motor plug is arranged in the front part of the inner cavity, the rear end of the motor plug is inserted into the motor plug insertion hole, and the front end is connected with a lead wire;
[0014] The cable connecting piece is inserted into the middle rear part of the socket insulating sleeve, the cable plug is inserted into the cable plug insertion hole, and the cable to be connected is electrically connected with the pre-oil submersible motor.
[0015] Preferably, a third limiting peripheral edge is arranged in the middle part of the motor head jack, a limiting shaft shoulder is arranged in the middle part of the socket insulating sleeve, and a disc spring is arranged between the limiting shaft shoulder and the third limiting peripheral edge.
[0016] Preferably, a chamfer structure is arranged at the front end of the motor socket, and an angular sealing O-shaped ring is arranged between the chamfer structure and the second limiting peripheral edge.
[0017] Preferably, a plurality of radially arranged sealing groove slots are arranged in the middle part of the socket insulating sleeve, and radial sealing O-shaped rings are arranged in the sealing groove slots.
[0018] Preferably, the plurality of radially arranged sealing groove slots are two.
[0019] Preferably, a clamping ring is arranged at the rear part of the motor head jack, used for preventing the socket insulating sleeve from being taken out of the motor head jack.
[0020] Preferably, a detachable plug transportation cap is arranged at the front end of the cable connecting sleeve.
[0021] Preferably, a detachable socket transportation cap is arranged at the rear part of the motor head jack.
[0022] Preferably, the cable plug is threadedly connected with the copper wire end of the cable to be connected.
[0023] The beneficial effect of the present application is that the cable and the motor are quickly connected through the cable connecting piece and the motor connecting piece. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 is a sectional view of the connecting structure of the pre-oil submersible motor and the submersible cable.
[0025] Figure 2 is a sectional view of the cable connecting piece in the present application.
[0026] Figure 3 is a sectional view of the cable plug in the present application.
[0027] Figure 4 is a sectional view of the plug insulation sleeve in the present application.
[0028] Figure 5 is a sectional view of the cable connecting sleeve and the sealing sleeve in the present application.
[0029] Figure 6 is a sectional view of the motor connecting piece in the present application.
[0030] Figure 7 is a sectional view of the socket insulation sleeve in the present application.
[0031] Figure 8 is a sectional view of the motor socket in the present application.
[0032] Figure 9 is a sectional view of the motor plug in the present application.
[0033] Figure 10 is a sectional view of the cable to be connected in the present application. DETAILED DESCRIPTION
[0034] The application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the application according to the description and the drawings.
[0035] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or other elements or combinations thereof.
[0036] As shown in the drawings, one implementation form of the present application is to achieve the above-mentioned purpose, and the present application adopts the following technical solutions, comprising: a cable connecting piece 100 arranged at the front end of the cable to be connected 2 and a motor connecting piece 200 arranged in the jack 31 of the motor head 3. Figures 1-10 The cable connecting piece 100 comprises:
[0037]
[0038] The cable plug 110 is detachably connected with the end of the copper wire of the cable 2 to be connected. As a preferred, the cable plug 110 is connected with the end of the copper wire 21 of the cable 2 to be connected through the thread 111.
[0039] The middle and rear part of the plug insulation sleeve 120 is sleeved on the front end of the rubber inner sheath 22 of the cable 2 to be connected, the inner periphery of the front part of the plug insulation sleeve 120 is provided with a first limiting periphery 121, the inner periphery of the first limiting periphery is matched with the outer periphery of the copper wire 21, and the two ends of the first limiting periphery 121 are respectively in abutment with the front end of the rubber inner sheath 120 and the end of the cable plug 110; the end of the plug insulation sleeve 120 is in abutment with the front end of the steel pipe outer sheath 22 of the cable 2 to be connected; the front end of the plug insulation sleeve 120 is matched with the outer periphery of the cable plug 110;
[0040] The cable connecting sleeve 130 is sleeved on the middle and rear part of the plug insulation sleeve 120, the inner periphery of the front part of the cable connecting sleeve 130 is matched with the outer periphery of the plug insulation sleeve 120; the inner periphery of the rear part of the cable connecting sleeve 130 is matched with the outer periphery of the steel pipe outer sheath 23 of the cable 2 to be connected. As a preferred, the thread 131 for connecting with the plug transportation cap 150 is arranged at the front end of the cable connecting sleeve 130.
[0041] The sealing sleeve 140 is sleeved on the cable 2 to be connected and is detachably connected with the end of the cable connecting sleeve 130, and is used for fixing the plug insulation sleeve 130 on the cable 2 to be connected. As a preferred, the sealing sleeve 140 is threadedly connected with the cable connecting sleeve 130, and the sealing ring 141 is arranged in the sealing sleeve 140.
[0042] The motor connecting piece 200 comprises;
[0043] A socket insulation sleeve 210 is arranged in the motor head 3 socket 31, the outer periphery of the socket insulation sleeve 210 is matched with the motor head 3 socket 31, an axial inner cavity is arranged in the socket insulation sleeve 210, a second limiting periphery 211 is arranged in the middle of the inner cavity. As a preferred, a third limiting periphery 31a is arranged in the middle of the motor head 3 socket 31, a limiting shaft shoulder 212 is arranged in the middle of the socket insulation sleeve 210, a disc spring 250 is arranged between the limiting shaft shoulder 212 and the third limiting periphery. As a further preferred, a plurality of radially arranged sealing ring grooves 213 are arranged in the middle of the socket insulation sleeve 210, a radial sealing O-ring 270 is arranged in the sealing ring groove. As a further preferred, the plurality of radially arranged sealing ring grooves 213 are two. As a further preferred, a snap ring 280 is arranged at the rear of the motor head 3 socket 31, which is used to prevent the socket insulation sleeve 210 from coming out of the motor head 3 socket 31. As a further preferred, a socket transportation cap 290 is arranged at the rear of the motor head 3 socket 31, which is detachably connected.
[0044] A motor socket 220 is arranged in the middle of the inner cavity, the front end of the motor socket 220 abuts against the rear end face of the second limiting periphery 211, a motor plug insertion hole 221 is arranged at the front of the motor socket 220, and a cable plug insertion hole 222 is arranged at the rear of the motor socket. As a preferred, a chamfer structure 223 is arranged at the front end of the motor socket 220, and an angular sealing O-ring 260 is arranged between the chamfer structure 223 and the second limiting periphery.
[0045] A motor plug 230 is arranged at the front of the inner cavity, the rear end of the motor plug 230 is inserted into the motor plug insertion hole 221, and a lead wire 240 is connected to the front end. As a preferred, the motor plug 230 is connected to the motor plug insertion hole 221 through a thread 231. As a further preferred, a chamfer structure 232 is arranged at the rear end of the motor plug 230.
[0046] Among them, the cable connector 100 is inserted into the middle and rear part of the socket insulation sleeve 210, and the cable plug 110 is inserted into the cable plug insertion hole 222, so as to realize the electrical connection between the to-be-connected cable 2 and the pre-oil-filled submersible motor 3.
[0047] In use, first, the steel pipe outer sheath layer 23, the rubber inner sheath layer 22 of the cable 2 are peeled off in turn, the copper conductor 21 is exposed, and a thread is formed on the copper conductor 21; then the sealing sleeve 140, the cable connecting sleeve 130, and the plug insulating sleeve 120 are assembled on the cable 2, the sealing sleeve 140 is assembled with the cable connecting sleeve 130 through a thread, and the assembly is loose; then the cable plug 110 is assembled with the copper conductor 21 through a thread, and is tightened; the plug transport cap 150 is tightened with the cable connecting sleeve 130 through a thread. Then, the lead-in wire 240 is extended from the jack 31 of the motor head 3, the end insulation of the lead-in wire 240 is removed, the motor plug 230 is soldered and fixed with the lead-in wire 240 by high-temperature soldering; the motor socket 220 is silver-plated, the disc spring 250 is sleeved on the socket insulating sleeve 210, the angular sealing O-shaped ring 260 is installed in the socket insulating sleeve 210, the socket insulating sleeve 210 is sleeved on the motor plug 230, the motor socket 220 is assembled with the motor plug 230 through a thread after being heated by high-temperature soldering, and is tightened; the radial sealing O-shaped ring 270 is installed on the socket insulating sleeve 210, the socket insulating sleeve 210 is installed in the jack 31 of the motor head 3, and is fixed by a clasp 280; the socket transport cap 290 is tightened with the jack 31 of the motor head 3 through a thread. Finally, the plug transport cap 150 and the socket transport cap 290 are removed, the cable connecting piece 100 is inserted into the motor connecting piece 200, the cable connecting sleeve 130 is tightened, and the sealing sleeve 140 is tightened. After insulation is measured, the product is qualified and is lowered into a well.
[0048] In another embodiment, a third limiting periphery 31a is arranged in the middle of the jack 31 of the motor head 3, a limiting shoulder 212 is arranged in the middle of the socket insulating sleeve 210, and the disc spring 250 is arranged between the limiting shoulder 212 and the third limiting periphery.
[0049] In another embodiment, a chamfer structure 223 is arranged at the front end of the motor socket 220, and the angular sealing O-shaped ring 260 is arranged between the chamfer structure 223 and the second limiting periphery.
[0050] In another embodiment, a plurality of radial sealing groove 213 are arranged in the middle of the socket insulating sleeve, and the radial sealing O-shaped ring 270 is arranged in the radial sealing groove.
[0051] In another embodiment, the plurality of radial sealing groove 213 are two.
[0052] In another embodiment, the clasp 280 is arranged at the rear of the jack 31 of the motor head 3, and is used for preventing the socket insulating sleeve 210 from being separated from the jack 31 of the motor head 3.
[0053] In another embodiment, a detachable plug transport cap 150 is provided at the front end of the cable connection sleeve 130.
[0054] In another embodiment, a detachable socket transport cap 290 is provided at the rear end of the motor head 3 socket 31.
[0055] In another embodiment, the cable plug 110 is connected to the end of the copper wire 21 of the cable 2 to be connected by a thread 111.
[0056] In summary, the connection structure 1 of the pre-oil submersible motor and the submersible cable of the present application realizes the quick connection of the cable and the motor through the cable connecting piece and the motor connecting piece.
[0057] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be fully applied to various fields suitable for the present application, and additional modifications can be easily made by those skilled in the art, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.
Claims
1. A pre-filled oil submersible motor and submersible cable connection structure, comprising a cable connector arranged at the front end of a cable to be connected and a motor connector arranged in a motor head socket, characterized in that: the cable connector comprises: a cable plug which is detachably connected with the end of the copper wire of the cable to be connected; a plug insulation sleeve, wherein the rear part of the plug insulation sleeve is sleeved on the front end of the rubber inner sheath of the cable to be connected, the front part of the plug insulation sleeve is provided with a first limiting circumferential edge, the inner circumferential surface of the first limiting circumferential edge is matched with the outer circumferential surface of the copper wire, and the two ends of the first limiting circumferential edge are respectively in abutment with the front end of the rubber inner sheath and the end of the cable plug; the end of the plug insulation sleeve is in abutment with the front end of the steel pipe outer sheath of the cable to be connected; the front end of the plug insulation sleeve is matched with the outer circumferential surface of the cable plug; a cable connecting sleeve is sleeved on the middle and rear part of the plug insulation sleeve, the inner circumferential surface of the front part of the cable connecting sleeve is matched with the outer circumferential surface of the plug insulation sleeve, and the inner circumferential surface of the rear part of the cable connecting sleeve is matched with the outer circumferential surface of the steel pipe outer sheath of the cable to be connected; a sealing sleeve is sleeved on the cable to be connected and is detachably connected with the end of the cable connecting sleeve, and is used for fixing the plug insulation sleeve on the cable to be connected; the motor connector comprises: a socket insulation sleeve arranged in the motor head socket, the outer circumferential surface of the socket insulation sleeve is matched with the motor head socket, an axial inner cavity is arranged in the socket insulation sleeve, and a second limiting circumferential edge is arranged in the middle part of the inner cavity; a motor socket is arranged in the middle part of the inner cavity, the front end of the motor socket is in abutment with the rear end surface of the second limiting circumferential edge, a motor plug insertion hole is arranged in the front part of the motor socket, and a cable plug insertion hole is arranged in the rear part of the motor socket; a motor plug is arranged in the front part of the inner cavity, the rear end of the motor plug is inserted into the motor plug insertion hole, and the front end is connected with a lead wire; wherein the cable connector is inserted into the middle and rear part of the socket insulation sleeve, the cable plug is inserted into the cable plug insertion hole, and the cable to be connected and the pre-filled oil submersible motor are electrically connected. A third limiting circumferential edge is arranged in the middle part of the motor head socket, a limiting shoulder is arranged in the middle part of the socket insulation sleeve, and a disc spring is arranged between the limiting shoulder and the third limiting circumferential edge. A chamfer structure is arranged at the front end of the motor socket, and an angular sealing O-shaped ring is arranged between the chamfer structure and the second limiting circumferential edge. A plurality of radially arranged sealing ring grooves are arranged in the middle part of the socket insulation sleeve, and radial sealing O-shaped rings are arranged in the sealing ring grooves. The plurality of radially arranged sealing ring grooves are two. A snap ring is arranged at the rear part of the motor head socket, and is used for preventing the socket insulation sleeve from being pulled out of the motor head socket. A detachable plug transportation cap is arranged at the front end of the cable connecting sleeve. A detachable socket transportation cap is arranged at the rear part of the motor head socket. The cable plug and the end of the copper wire of the cable to be connected are connected through threads. 2. The pre-filled oil submersible motor and submersible cable connection structure according to claim 1, characterized in that: 3. The pre-filled oil submersible motor and submersible cable connection structure according to claim 1 or 2, characterized in that: 4. The pre-filled oil submersible motor and submersible cable connection structure according to claim 3, characterized in that: 5. The pre-filled oil submersible motor and submersible cable connection structure according to claim 4, characterized in that: 6. The pre-filled oil submersible motor and submersible cable connection structure according to claim 2, characterized in that: 7. The pre-filled oil submersible motor and submersible cable connection structure according to claim 1 or 2, characterized in that: 8. The pre-filled oil submersible motor and submersible cable connection structure according to claim 7, characterized in that: 9. The pre-filled oil submersible motor and submersible cable connection structure according to claim 1 or 2, characterized in that:
Citation Information
Patent Citations
Modular cable head of electrical submersible pump unit
CN104134965A
Method for hydrodynamically pushing and connecting wet joint of cable
CN115411548A