CN113417608A - Oil-submersible screw pump equipment convenient for tripping operation and operation method thereof - Google Patents
Oil-submersible screw pump equipment convenient for tripping operation and operation method thereof Download PDFInfo
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- CN113417608A CN113417608A CN202110971212.4A CN202110971212A CN113417608A CN 113417608 A CN113417608 A CN 113417608A CN 202110971212 A CN202110971212 A CN 202110971212A CN 113417608 A CN113417608 A CN 113417608A
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- submersible
- plug
- screw pump
- cable
- wiring terminal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/128—Adaptation of pump systems with down-hole electric drives
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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
- H01R13/5219—Sealing means between coupling parts, e.g. interfacial seal
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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
- H01R13/631—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for engagement only
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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
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
Abstract
The invention discloses an oil-submersible screw pump device convenient for running and a working method thereof, and relates to the technical field of petroleum and natural gas development equipment.A lower end of an oil-submersible cable is electrically connected with an oil-submersible motor through a plug-in type electric connection unit, and the plug-in type electric connection unit comprises a plug-in connector and a plug-in socket; the connector is fixedly arranged at the lower end of the submersible cable and comprises a first cylindrical shield with a downward opening, and a first wiring terminal is arranged in the first cylindrical shield; the plug socket is fixedly arranged in the oil pipe above the screw pump unit and comprises a second cylindrical shield with an upward opening, and a second wiring terminal is arranged in the second cylindrical shield; the first wiring terminal and the second wiring terminal are detachably connected, and the first cylindrical protective cover and the second cylindrical protective cover are spliced; a guide mechanism which is convenient for the accurate butt joint of the plug connector and the plug socket is arranged above the plug-in type electric connection unit; the cable is connected with the submersible motor through the plug-in type electric connection unit, so that the butt joint is quick and the operation efficiency is high.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas development equipment, in particular to a submersible screw pump device convenient for running-up and running-down operation and an operation method thereof.
Background
The electric submersible screw pump is a new breakthrough in the development of oil production equipment in recent years, combines the advantages of the electric submersible pump and the screw pump, combines the advantages of the electric submersible pump and the ground-driven screw pump, changes the ground drive of the screw pump into the drive of an efficient submersible motor, removes the sucker rod, solves the problems of tripping, rod breaking, eccentric wear and the like caused by the threads and the coupling of the sucker rod, and prolongs the pump detection period. Can be used for inclined wells and horizontal wells; the high-torque high-speed oil pumping device is particularly suitable for thick oil wells, sand-containing wells, gas-containing wells and small-displacement wells which are difficult to operate in conventional oil pumping equipment such as rod pumps, electric submersible pumps and the like, has large starting torque, and is suitable for the exploitation of inclined wells, thick oil wells and high-sand-content and high-gas-content wells.
The electric submersible screw pump conveys the current of a ground power supply to a submersible motor through a submersible cable, the current is a common structure that the submersible cable is laid outside an oil pipe, in the installation process of the submersible screw pump going into a well, the oil pipe needs to be put in, a single wire is connected, the cable is discharged at the same time, the submersible cable is clamped outside the oil pipe through a clamp, when the submersible screw pump unit in the well breaks down, such problems as the damage of the rubber of a screw pump stator, the stop operation of the submersible motor, the failure of a protector and the like, the unit in the well needs to be lifted out to the ground for maintenance, in the process of lifting out the unit in the well, the oil pipe needs to be lifted, the single wire is dismounted, the cable clamp is dismounted, the cable is wound, the work load of lifting the well is large, and the operation cost is high. And the cable of diving is installed outside the oil pipe and is fixed on oil pipe through the cable checkpost, and the cable checkpost installation, dismantlement in-process cause the mechanical damage of the cable insulating layer of diving easily, and general cable of diving just can play the well two to the cubic and can't continue to use because of the insulating layer damages, and the cost of single cable of diving is between several ten thousand yuan to ten thousand yuan, not only caused the waste of the cable of diving but also improved the oil recovery cost.
Disclosure of Invention
The invention aims to provide a submersible screw pump device convenient for running and pulling operation and an operation method thereof aiming at the defects in the prior art.
The technical scheme of the invention is as follows: an oil-submersible screw pump device convenient for running operation comprises a ground wellhead device, an oil pipe, a screw pump unit in the well and an oil-submersible cable for supplying power to the screw pump unit, wherein the screw pump unit comprises an oil-submersible motor, a protector, a flexible shaft connector and a screw pump which are sequentially connected from bottom to top;
the submersible cable penetrates through a ground wellhead device and an oil pipe and extends to the underground, and the lower end of the submersible cable is electrically connected with the submersible motor through a plug-in type electric connection unit; the plug-in type electric connection unit comprises a plug connector and a plug socket;
the plug is fixedly arranged at the lower end of the submersible cable and comprises a first cylindrical shield with a downward opening; a first wiring terminal electrically connected with the submersible cable is arranged in the first cylindrical shield;
the plug socket is fixedly arranged in the oil pipe above the screw pump unit and comprises a second cylindrical shield with an upward opening; a second wiring terminal electrically connected with the submersible motor is arranged in the second cylindrical shield;
the first wiring terminal and the second wiring terminal are detachably connected, the first cylindrical protective cover and the second cylindrical protective cover are inserted, and a sealed space isolated from the outside can be established after the first cylindrical protective cover and the second cylindrical protective cover are connected;
and a guide mechanism which is convenient for the accurate butt joint of the plug-in connector and the plug socket is arranged above the plug-in type electric connection unit.
Preferably, the first cylindrical shield has an inner diameter larger than an outer diameter of the second cylindrical shield.
Preferably, a sealing element is arranged between the adjacent surfaces of the first cylindrical shield and the second cylindrical shield, the sealing element is of a thin-wall cylindrical structure, the sealing element is sleeved outside the second cylindrical shield in a sliding sealing manner, and the outer wall of the sealing element is matched with the inner wall of the first cylindrical shield in a sliding sealing manner; and a spring component with a buffering function is arranged at the bottom of the sealing element.
Preferably, the first wiring terminal is a plurality of metal jack pieces which are uniformly distributed on the circumference and embedded in the first cylindrical shield, and the plurality of metal jack pieces are respectively and electrically connected with the single-phase wire core of the submersible cable; the second wiring terminal is a plurality of metal contact pins which are circumferentially and uniformly distributed and are matched with the metal jack pieces, and the metal contact pins are electrically connected with the single-phase wiring terminals of the submersible motor respectively.
Preferably, the first wiring terminal is a plurality of metal contact pins which are uniformly distributed on the circumference, and the plurality of metal contact pins are respectively and electrically connected with the single-phase wire core of the submersible cable; the second wiring terminal is a plurality of metal plug hole pieces which are circumferentially and uniformly distributed and are matched with the metal contact pins, and the metal plug hole pieces are electrically connected with the single-phase wiring terminals of the submersible motor respectively.
Preferably, the guide mechanism comprises a guide cylinder and a guide plate, the lower end of the oil pipe is connected with the upper end of the stator of the screw pump through an intermediate connecting pipe of which the inner diameter is slightly larger than the outer diameter of the oil pipe, the guide cylinder is fixedly sleeved near the upper end of the inner wall of the intermediate connecting pipe, and a plurality of axial guide grooves are circumferentially arrayed on the inner wall of the guide cylinder; a liquid flow channel is arranged on the inner wall of the guide cylinder between the adjacent guide grooves, and a plurality of guide plates are arranged on the upper side of the plug connector in a circumferential array and are in sliding fit with the guide grooves; the middle connecting pipe is characterized in that a supporting plate is arranged near the lower end of the middle connecting pipe, the inserting seat is fixedly arranged on the supporting plate in the middle, and a plurality of liquid flow through holes are formed in the supporting plate on the periphery of the inserting seat.
Preferably, a first locking part is arranged in the guide groove, the first locking part is an elastic reed, the upper end of the first locking part is connected with the bottom of the guide groove through a shearing pin, and the body of the first locking part extends downwards along the guide groove and the lower end of the first locking part extends out of the guide groove; the guide plate is provided with a groove matched with the first locking part, namely a second locking part; the second locking portion is detachably connected with the first locking portion.
Preferably, the submersible cable passes out of the ground wellhead device and is electrically connected with the power supply control system, and a hanging part for hanging the submersible cable is arranged in the ground wellhead device.
An operation method of a submersible screw pump device convenient for tripping operation comprises the following steps:
1) connecting the plug socket with the screw pump unit, installing the plug socket in the oil pipe, and setting the depth of the plug socket along with the lowering of the oil pipe into the shaft;
2) connecting the plug with the lower end of the submersible cable, and conveying the plug and the submersible cable into the oil pipe from a ground wellhead device under the dry condition in the oil pipe;
3) the plug connector is butted with the plug socket to realize the plug fit of the first wiring terminal and the second wiring terminal and simultaneously realize the plug fit of the first cylindrical shield and the second cylindrical shield so as to establish a sealed space at the joint of the first wiring terminal and the second wiring terminal;
4) the suspension and sealing of the submersible cable are realized through a ground wellhead device, and the upper end of the submersible cable is electrically connected with a power supply control system.
Compared with the prior art, the invention has the following advantages:
in the operation of going into the well, at first the oily screw pump unit of well diving is connected to the oil pipe bottom and goes into the well along with it, puts in the cable of diving into to the pit in by the oil pipe again, through the disposable butt joint of plug-in type electrical connection unit oily cable of diving with oily motor in the pit, no longer need the cable checkpost with the oily cable chucking of diving to the oil pipe on, reduced the well operation volume of going into the well.
In the well-raising operation, the oil-submersible cable is firstly lifted out integrally from the oil pipe, then the pipe column is lifted and the single joint is disassembled under the condition of no oil-submersible cable, and compared with the operation of disassembling the single joint and the cable clamp at the same time, the well-raising operation amount is reduced.
And because the oil-submersible cable is placed in the oil pipe, the oil-submersible cable is not required to be clamped tightly by the cable clamp, the mechanical damage of the cable clamp to an insulating layer of the oil-submersible cable is avoided, the cable can be repeatedly used for many times, the material cost of the oil-submersible cable is saved, and the oil extraction cost of the electric oil-submersible screw pump is effectively reduced.
Drawings
FIG. 1 is a schematic structural view of a plug-in type electrical connection unit in a separated state according to the present invention;
FIG. 2 is a schematic structural view of the plug-in type electrical connection unit of the present invention in a butt joint state;
FIG. 3 is a schematic diagram of a plug-in type electrical connection unit provided with a locking mechanism in a separated state;
fig. 4 is a schematic view of the docking state of the plug-in type electrical connection unit provided with the locking mechanism.
In the figure: 1. surface wellhead assembly 101, suspension member 2, oil pipe 3, oil-submersible cable 4, screw pump 5, protector 6, oil-submersible motor 7, plug connector 701, first cylindrical shield 702, first wiring terminal 8, plug socket 801, second cylindrical shield 802, second wiring terminal 9, middle connecting pipe 10, guide cylinder 1001, guide groove 11, guide plate 12, support plate 1201, liquid flow through hole 13, first locking part 14, second locking part.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
The invention provides a submersible screw pump device convenient for lifting operation and an operation method thereof, which are used for facilitating the implementation of the lifting operation of a submersible screw pump and realizing the reduction of the workload of the lifting operation of the submersible screw pump.
Example one
Referring to fig. 1-2, the submersible screw pump equipment convenient for running-down operation comprises a ground wellhead device 1, an oil pipe 2, a downhole screw pump 4 unit and a submersible cable 3 for supplying power to the screw pump 4 unit, wherein the screw pump 4 unit comprises a submersible motor 6, a protector 5, a flexible shaft connector and a screw pump 4 which are sequentially connected from bottom to top, a discharge port of the screw pump 4 is connected with the lower end of the oil pipe 2, and the upper end of the oil pipe 2 is connected with the ground wellhead device 1;
the submersible cable 3 passes through the ground wellhead device 1 and the oil pipe 2 and extends to the underground, and the lower end of the submersible cable is electrically connected with the submersible motor 6 through the plug-in type electric connection unit; the plug-in type electric connection unit comprises a plug-in connector 7 and a plug-in seat 8;
the plug 7 is fixedly arranged at the lower end of the submersible cable 3, and the plug 7 comprises a first cylindrical shield 701 with a downward opening; a first wiring terminal 702 electrically connected with the submersible cable 3 is provided in the first cylindrical shield 701;
the plug socket 8 is fixedly arranged in the oil pipe 2 above the screw pump 4 unit, and the plug socket 8 comprises a second cylindrical shield 801 with an upward opening; a second wiring terminal 802 electrically connected with the submersible motor 6 is arranged in the second cylindrical shield 801;
the first wiring terminal 702 and the second wiring terminal 802 are in detachable fit relation along the axial direction of the oil pipe 2, the first cylindrical shield 701 and the second cylindrical shield 801 are inserted along the axial direction of the oil pipe 2, and a sealing space isolated from the outside can be established after the first cylindrical shield 701 and the second cylindrical shield 801 are connected, so that the electric insulation failure of the connection between the first wiring terminal 702 and the second wiring terminal 802 caused by the invasion of outside oil and water is prevented, and the isolation and sealing relation is achieved.
In this embodiment, the first connection terminal 702 is a plurality of metal jack pieces uniformly distributed around the circumference and embedded in the first cylindrical shield 701, and the plurality of metal jack pieces are electrically connected to the single-phase wire cores of the submersible cable 3, respectively; the second wiring terminal 802 is a plurality of metal pins which are circumferentially and uniformly distributed and are adapted to the metal jack pieces, and the plurality of metal pins are respectively and electrically connected with the single-phase wiring terminals of the submersible motor 6.
In more detail, in order to prevent sand in the oil pipe 2 from sinking into the gap between the first cylindrical shield 701 and the second cylindrical shield 801 during production, the inner diameter of the first cylindrical shield 701 in the present embodiment is larger than the outer diameter of the second cylindrical shield 801, so that the second cylindrical shield 801 is inserted into the first cylindrical shield 701 to form a cover for the opening on the second cylindrical shield 801.
In order to realize the precise butt joint of the plug-in connector 7 and the plug-in socket 8, a guide mechanism is arranged above the plug-in type electric connection unit of the embodiment.
When the device works, the device comprises the following steps:
1) connecting the plug socket 8 with the screw pump 4 unit, installing the plug socket in the oil pipe 2, and setting the depth along with the lowering of the oil pipe 2 into the shaft;
2) connecting the plug 7 with the lower end of the submersible cable 3, and conveying the plug 7 and the submersible cable 3 into the oil pipe 2 from the ground wellhead device 1 under the dry condition in the oil pipe 2;
3) the plug connector 7 is butted with the plug socket 8, so that the plug fit of the first wiring terminal 702 and the second wiring terminal 802 is realized, and the plug fit of the first cylindrical shield 701 and the second cylindrical shield 801 is realized, so that a sealed space at the joint of the first wiring terminal 702 and the second wiring terminal 802 is established;
4) the suspension and sealing of the submersible cable 3 are realized through the ground wellhead device 1, and the upper end of the submersible cable 3 is electrically connected with a power supply control system.
In the operation of going down the well, at first the oily screw pump 4 unit of well dives is connected to oil pipe 2 bottom and goes into the well thereupon, puts into the cable 3 of diving in the pit by oil pipe 2 again, dives the one-time butt joint of cable 3 and oily motor 6 of diving in the pit through plug-in type electrical connection unit, no longer need the cable checkpost with dive on oil pipe 2 with dive cable 3 chucking, reduced the well operation volume of going down the well.
In the well-raising operation, the oil-submersible cable 3 is firstly lifted integrally from the oil pipe 2, then the pipe column is lifted and the single joint is disassembled under the condition that the oil-submersible cable 3 is not arranged, and compared with the operation of disassembling the single joint and the cable clamp, the well-raising operation amount is reduced.
And, because the cable 3 of diving into oil is placed in oil pipe 2, no longer need cable clip to press from both sides tightly to the cable 3 of diving into oil tightly, avoided cable clip to 3 insulating layer mechanical damage of cable of diving into oil, the cable can be repeatedly used many times to practice thrift the material cost of the cable 3 of diving into oil, effectively reduced the oil recovery cost of using electronic latent oil screw pump 4.
Example two
As a preferred embodiment of the present invention, in this embodiment, in addition to the first embodiment, a sealing member is additionally provided between adjacent surfaces of the first cylindrical shroud 701 and the second cylindrical shroud 801, specifically:
the sealing element in this embodiment is a thin-walled cylindrical structure, which is slidably and sealingly sleeved outside the second cylindrical shield 801, and the outer wall of which is slidably and sealingly engaged with the inner wall of the first cylindrical shield 701; the bottom of the sealing element is provided with a spring part which plays a role of buffering; the sealing element enables the first cylindrical shield 701 and the second cylindrical shield 801 to form a sealing space after being spliced together, thereby effectively preventing external liquid from entering.
EXAMPLE III
As a preferred embodiment of the present invention, the difference between the present embodiment and the first embodiment is that the structural configuration of the first connection terminal 702 and the second connection terminal 802 specifically includes:
in this embodiment, the first connection terminal 702 is a plurality of metal pins uniformly distributed around the circumference, and the plurality of metal pins are electrically connected to the single-phase wire core of the submersible cable 3 respectively; the second wiring terminal 802 is a plurality of metal plug-in hole pieces which are circumferentially and uniformly distributed and are adapted to the metal plug-in pins, and the plurality of metal plug-in hole pieces are respectively and electrically connected with the single-phase wiring terminal of the submersible motor 6.
Example four
As a preferred embodiment of the present invention, in this embodiment, the guide mechanism is refined on the basis of the second embodiment, specifically:
the guide mechanism of the embodiment comprises a guide cylinder 10 and a guide plate 11, wherein the lower end of an oil pipe 2 is connected with the upper end of a stator of a screw pump 4 through an intermediate connecting pipe 9 with the inner diameter slightly larger than the outer diameter of the oil pipe 2, the guide cylinder 10 is fixedly sleeved near the upper end of the inner wall of the intermediate connecting pipe 9, and a plurality of axial guide grooves 1001 are circumferentially arranged on the inner wall of the guide cylinder 10 in an array manner; a liquid flow channel is arranged on the inner wall of the guide cylinder 10 between the adjacent guide grooves 1001, and a plurality of guide plates 11 are arranged on the upper side of the plug connector 7 in a circumferential array and are in sliding fit with the guide grooves 1001; a supporting plate 12 is arranged near the lower end of the middle connecting pipe 9, the inserting seat 8 is fixedly arranged on the supporting plate 12 in the middle, and a plurality of liquid flow through holes 1201 are arranged on the supporting plate 12 at the periphery of the inserting seat 8.
In use, the guide plate 11 is slidably engaged with the guide groove 1001 such that the first terminal 702 of the plug 7 is axially aligned with the second terminal 802 of the socket 8.
EXAMPLE five
As a preferred embodiment of the present invention, in this embodiment, on the basis of the fourth embodiment, a locking mechanism is additionally provided in the guide mechanism, specifically:
referring to fig. 3-4, a first locking portion 13 is disposed in the guide slot 1001 of the present embodiment, the first locking portion 13 is an elastic spring, the upper end of the elastic spring is connected to the bottom of the guide slot 1001 through a shear pin, and the body of the elastic spring extends downward along the guide slot 1001 and the lower end of the elastic spring protrudes out of the guide slot 1001; the guide plate 11 is provided with a groove adapted to the first locking portion 13, i.e., a second locking portion 14; the second locking portion 14 is detachably connected to the first locking portion 13; the cooperation of the first locking portion 13 and the second locking portion 14 realizes the position fixation of the guide plate 11 entering the guide groove 1001, thereby realizing the stable connection of the plug 7 and the socket 8.
In more detail, a sensor is arranged in a groove as the second locking part 14, and the sensor is electrically connected with a control system on the ground through a signal wire core arranged in the submersible cable 3; in the process that the plug connector 7 is inserted along with the submersible cable 3, when the elastic reed serving as the first locking part 13 is clamped into the second locking part 14, the elastic reed contacts the sensor, and the sensor transmits a signal to a control system on the ground through the signal wire core, so that ground personnel can timely know the success of connection between the plug connector 7 and the plug socket 8, the submersible cable 3 is not continuously dropped downwards, and the controllability of operation and the information acquisition capability are improved.
EXAMPLE six
In the embodiment, the submersible cable 3 in the oil pipe 2 is in a straight state, and the arrangement is favorable for the stable connection of the plug 7 and the plug seat 8 and the flow of the produced liquid in the oil pipe 2, for this reason, the submersible cable 3 penetrates out of the ground wellhead device 1 and is connected with a power supply control system on the ground, and a suspension part 101 for suspending the submersible cable 3 is arranged in the ground wellhead device 1; in a specific structure, the suspension member 101 may be a tapered fixture block or a locking block adapted to a tapered cavity of the wellhead.
More specifically, a weighting pipe is arranged above the first cylindrical shield 701 of the plug 7, the submersible cable 3 passes through the weighting pipe to be connected with the plug 7, and the guide plates 11 are uniformly distributed on the outer wall of the weighting pipe.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (9)
1. The utility model provides an oil-submersible screw pump equipment convenient to operation down takes, includes ground well head device, oil pipe, screw pump unit in the pit and to the oily cable of diving of the power supply of screw pump unit, screw pump unit includes by oily motor, protector, flexible coupling and the screw pump of diving that connect gradually from bottom to top, the discharge port and the oil pipe lower extreme of screw pump are connected, the oil pipe upper end is connected with ground well head device, its characterized in that:
the submersible cable penetrates through a ground wellhead device and an oil pipe and extends to the underground, and the lower end of the submersible cable is electrically connected with the submersible motor through a plug-in type electric connection unit; the plug-in type electric connection unit comprises a plug connector and a plug socket;
the plug is fixedly arranged at the lower end of the submersible cable and comprises a first cylindrical shield with a downward opening; a first wiring terminal electrically connected with the submersible cable is arranged in the first cylindrical shield;
the plug socket is fixedly arranged in the oil pipe above the screw pump unit and comprises a second cylindrical shield with an upward opening; a second wiring terminal electrically connected with the submersible motor is arranged in the second cylindrical shield;
the first wiring terminal and the second wiring terminal are detachably connected, the first cylindrical protective cover and the second cylindrical protective cover are inserted, and a sealed space isolated from the outside can be established after the first cylindrical protective cover and the second cylindrical protective cover are connected;
and a guide mechanism which is convenient for the accurate butt joint of the plug-in connector and the plug socket is arranged above the plug-in type electric connection unit.
2. The submersible screw pump apparatus for facilitating tripping operation of the submersible screw pump according to claim 1, wherein: the inner diameter of the first cylindrical shield is larger than the outer diameter of the second cylindrical shield.
3. The submersible screw pump apparatus for facilitating tripping operation of the submersible screw pump according to claim 2, wherein: a sealing element is arranged between the adjacent surfaces of the first cylindrical shield and the second cylindrical shield, the sealing element is of a thin-wall cylindrical structure, the sealing element is sleeved outside the second cylindrical shield in a sliding sealing manner, and the outer wall of the sealing element is matched with the inner wall of the first cylindrical shield in a sliding sealing manner; and a spring component with a buffering function is arranged at the bottom of the sealing element.
4. The submersible screw pump apparatus for facilitating tripping operation of the submersible screw pump according to claim 1, wherein: the first wiring terminal is a plurality of metal jack pieces which are uniformly distributed on the circumference and embedded in the first cylindrical shield, and the plurality of metal jack pieces are respectively and electrically connected with the single-phase wire core of the submersible cable; the second wiring terminal is a plurality of metal contact pins which are circumferentially and uniformly distributed and are matched with the metal jack pieces, and the metal contact pins are electrically connected with the single-phase wiring terminals of the submersible motor respectively.
5. The submersible screw pump apparatus for facilitating tripping operation of the submersible screw pump according to claim 1, wherein: the first wiring terminal is a plurality of metal contact pins which are uniformly distributed on the circumference, and the plurality of metal contact pins are respectively and electrically connected with the single-phase wire core of the submersible cable; the second wiring terminal is a plurality of metal plug hole pieces which are circumferentially and uniformly distributed and are matched with the metal contact pins, and the metal plug hole pieces are electrically connected with the single-phase wiring terminals of the submersible motor respectively.
6. The submersible screw pump apparatus for facilitating tripping operation of the submersible screw pump according to claim 1, wherein: the guide mechanism comprises a guide cylinder and a guide plate, the lower end of the oil pipe is connected with the upper end of the stator of the screw pump through an intermediate connecting pipe of which the inner diameter is slightly larger than the outer diameter of the oil pipe, the guide cylinder is fixedly sleeved near the upper end of the inner wall of the intermediate connecting pipe, and a plurality of axial guide grooves are circumferentially arrayed on the inner wall of the guide cylinder; a liquid flow channel is arranged on the inner wall of the guide cylinder between the adjacent guide grooves, and a plurality of guide plates are arranged on the upper side of the plug connector in a circumferential array and are in sliding fit with the guide grooves; the middle connecting pipe is characterized in that a supporting plate is arranged near the lower end of the middle connecting pipe, the inserting seat is fixedly arranged on the supporting plate in the middle, and a plurality of liquid flow through holes are formed in the supporting plate on the periphery of the inserting seat.
7. The submersible screw pump apparatus for facilitating tripping operation of the submersible screw pump according to claim 6, wherein: a first locking part is arranged in the guide groove, the first locking part is an elastic reed, the upper end of the first locking part is connected with the bottom of the guide groove through a shearing pin, and the body of the first locking part extends downwards along the guide groove and the lower end of the first locking part extends out of the guide groove; the guide plate is provided with a groove matched with the first locking part, namely a second locking part; the second locking portion is detachably connected with the first locking portion.
8. The submersible screw pump apparatus for facilitating tripping operation of the submersible screw pump according to claim 1, wherein: the submersible cable penetrates out of the ground wellhead device upwards and is electrically connected with the power control system, and a suspension part for suspending the submersible cable is arranged in the ground wellhead device.
9. The operation method of the submersible screw pump apparatus facilitating the trip operation according to any one of claims 1 to 8, characterized by comprising the steps of:
1) connecting the plug socket with the screw pump unit, installing the plug socket in the oil pipe, and setting the depth of the plug socket along with the lowering of the oil pipe into the shaft;
2) connecting the plug with the lower end of the submersible cable, and conveying the plug and the submersible cable into the oil pipe from a ground wellhead device under the dry condition in the oil pipe;
3) the plug connector is butted with the plug socket to realize the plug fit of the first wiring terminal and the second wiring terminal and simultaneously realize the plug fit of the first cylindrical shield and the second cylindrical shield so as to establish a sealed space at the joint of the first wiring terminal and the second wiring terminal;
4) the suspension and sealing of the submersible cable are realized through a ground wellhead device, and the upper end of the submersible cable is electrically connected with a power supply control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110971212.4A CN113417608A (en) | 2021-08-24 | 2021-08-24 | Oil-submersible screw pump equipment convenient for tripping operation and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110971212.4A CN113417608A (en) | 2021-08-24 | 2021-08-24 | Oil-submersible screw pump equipment convenient for tripping operation and operation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113417608A true CN113417608A (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110971212.4A Pending CN113417608A (en) | 2021-08-24 | 2021-08-24 | Oil-submersible screw pump equipment convenient for tripping operation and operation method thereof |
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| CN (1) | CN113417608A (en) |
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| CN114060267A (en) * | 2021-11-12 | 2022-02-18 | 华旭唐山石油科技有限公司 | Throwing-fishing type submersible screw pump with wet-type electric plug and use method thereof |
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