CN110374544B - Electric packer and packing method thereof - Google Patents
Electric packer and packing method thereof Download PDFInfo
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- CN110374544B CN110374544B CN201810333451.5A CN201810333451A CN110374544B CN 110374544 B CN110374544 B CN 110374544B CN 201810333451 A CN201810333451 A CN 201810333451A CN 110374544 B CN110374544 B CN 110374544B
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- oil
- thrust piston
- electromagnetic valve
- motor
- sleeve
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1275—Packers; Plugs with inflatable sleeve inflated by down-hole pumping means operated by a down-hole drive
Abstract
The invention provides an electric packer and a packing method thereof, and the electric packer comprises a central pipe and a control system, wherein the central pipe is a hollow pipe, the circumference of the central pipe is sequentially sleeved with a motor, a plunger pump and a guide sleeve, one end of the guide sleeve, which is close to the motor, extends into the plunger pump, a thrust piston which can move up and down is arranged on the circumference of the guide sleeve in the plunger pump, a fixed sleeve which is matched with the motor is arranged on the circumference of one end of the guide sleeve, which is far away from the motor, a blocking body which protrudes out of a cylinder is arranged on one end of the fixed sleeve, which is far away from the guide sleeve, at least one rubber cylinder is sleeved on the circumference of the fixed sleeve between the blocking body and the plunger pump, a top sleeve is arranged between the rubber cylinder and the thrust piston, one end of the top sleeve is sleeved on the circumference of the guide sleeve and is connected with the thrust piston, and the other end of the top sleeve is sleeved on the circumference of the fixed sleeve between the rubber cylinder and the thrust piston; the electric packer packing method comprises the steps of installation, setting, unsetting and dismantling. The invention has the advantages of convenient operation and repeated use.
Description
Technical Field
The invention relates to the technical field of oil fields, in particular to an electric packer and a packing method thereof.
Background
At present, the downhole packers used at home and abroad mainly rely on mechanical force and water pressure difference as power, oil well operation equipment such as workover vehicles, pump trucks, tank trucks and the like are often used in the process of lifting and lowering the well, and the packers have the disadvantages of complex integral structure and operation process, high labor intensity, poor flexibility and high operation cost.
Disclosure of Invention
The invention aims to solve the defects of the technology and provides the electric packer and the packing method thereof, wherein the electric packer has the advantages of simple structure, convenience in operation, low cost, time saving, labor saving and reusability.
The technical scheme of the invention is as follows:
an electric packer comprises a central tube and a control system, wherein the central tube is a hollow tube, a motor, a plunger pump and a guide sleeve are sequentially sleeved on the circumference of the central tube, a rotating shaft of the plunger pump is connected with a motor rotating shaft, one end, close to the motor, of the guide sleeve extends into the plunger pump, a thrust piston capable of moving up and down is arranged on the circumference of the guide sleeve in the plunger pump, a fixed sleeve matched with the guide sleeve is arranged on the circumference of one end, far away from the motor, of the guide sleeve, a blocking body protruding out of a cylinder is arranged on one end, far away from the guide sleeve, of the fixed sleeve, at least one rubber sleeve is sleeved on the circumference of the fixed sleeve between the blocking body and the plunger pump, a top sleeve is arranged between the rubber sleeve and the thrust piston, one end of the top sleeve is sleeved on the circumference of the guide sleeve and is connected with the thrust piston, the other end of the top sleeve is sleeved on the circumference of the fixed sleeve between the rubber sleeve and the thrust piston, the control system controls the thrust piston and the top sleeve to move in the direction far away from or close to the rubber cylinder by controlling the rotation direction of the motor.
The motor shaft is hollow rotating shaft, the axis of rotation of plunger pump is hollow axis of rotation, the hollow pivot cover that the motor passes through the motor is established and is corresponded the position at the center tube circumference, the hollow axis of rotation cover that the plunger pump passes through the plunger pump is established and is corresponded the position at the center tube circumference, the axis of rotation splined connection of motor shaft and plunger pump.
The end cover that packing element and top cover cooperation were used is equipped with first packing element clamping ring, the packing element is equipped with second packing element clamping ring with the tip that blocks the body cooperation and use.
The motor is close to the center tube, and one pot head that the center tube is close to the motor is equipped with first joint, first joint links to each other with the motor tip.
The plunger pump is further provided with a pump body, a closed oil tank and a lower cavity are correspondingly arranged on the circumferences of central pipes at the upper end and the lower end of the pump body, the upper end part of the thrust piston can be movably arranged in the inner cavity of the lower cavity along a guide sleeve up and down, an oil inlet of the pump body is connected with the oil tank through a sixth oil path, a first check valve is arranged on the sixth oil path, a first oil path is arranged at the upper end position of the thrust piston in the lower cavity corresponding to the oil outlet of the pump body, a first electromagnetic valve is arranged on the first oil path, the first electromagnetic valve is a two-position three-way electromagnetic valve, the inlet end of the first electromagnetic valve is connected with the outlet end of the pump body, the first outlet end of the first electromagnetic valve is communicated with the upper end position of the thrust piston, a second oil path connected with the lower end position of the thrust piston is arranged at the second outlet end of the first electromagnetic valve, and a third oil path communicated with the oil tank is arranged at one end, which is close to the first electromagnetic valve, and a second electromagnetic valve is arranged on the third oil path, a fourth oil path is arranged between the outlet end of the second electromagnetic valve and the first outlet end of the first electromagnetic valve, and a third electromagnetic valve is arranged on the fourth oil path.
The thrust piston is provided with a first thrust piston body, a second thrust piston body and a third thrust piston body, the first thrust piston body, the second thrust piston body and the third thrust piston body are respectively annular bodies, the first thrust piston body is arranged at the upper end of the second thrust piston body and is far away from the position of the central pipe, the third thrust piston body is arranged at the lower end of the second thrust piston body and is close to the position of the central pipe, the width of the first piston body is smaller than that of the second thrust piston body, the width of the third thrust piston body is smaller than that of the second thrust piston body, a first oil cavity for containing oil is formed between the inner side wall of the first thrust piston body, the upper end surface of the second thrust piston body and the outer side wall of the guide sleeve, a second oil cavity is formed between the outer side wall of the third thrust piston body and the inner side wall of the lower cavity, and one end of the second oil circuit, which is far away from the first electromagnetic valve, is communicated with the second oil cavity, and a first outlet end of the first electromagnetic valve is communicated with the first oil chamber through a first oil way.
The lower cavity is provided with a connecting sleeve, the connecting sleeve is provided with a first connecting body and a second connecting body, the first connecting body is an annular body with a closed upper end, the second connecting body is an annular body, the upper end face of the second connecting body is connected with the lower end face of the first connecting body, the lower end of the second connecting body is provided with a sealing piston matched with a third thrust piston body for use, the second thrust piston body is provided with a first sealing ring, and the sealing piston is sleeved with a second sealing ring.
The upper end of the inner side wall of the first thrust piston body, which is close to the central tube, is provided with a first annular groove extending in the direction away from the central tube, and the longitudinal section of the first annular groove is in an inverted frustum shape.
And a fifth oil way is arranged between the first oil way and the third oil way, one end of the fifth oil way is communicated with the first oil way between the outlet end of the first check valve and the inlet end of the first electromagnetic valve, the other end of the fifth oil way is communicated with the third oil way between the oil tank and the second electromagnetic valve, and an overflow check valve which can lead the lower cavity to be communicated with the oil tank is arranged on the fifth oil way.
The electric packer packing method comprises the following steps:
(1) electric packer for installation
Sending the electric packer to a specified depth underground through oilfield equipment, and connecting the electric packer with commercial power on an oilfield site;
(2) setting seal
The control system controls the motor to rotate forwards, the rotating shaft of the motor drives the rotating shaft of the plunger pump to rotate, the control system controls the inlet end and the first outlet end of the first electromagnetic valve to be in an open state, the control system controls the second electromagnetic valve to be in an open state, the control system controls the third electromagnetic valve to be in a closed state, oil in the oil tank is injected into a first oil cavity at the upper end of the thrust piston through the first oil way and the first electromagnetic valve, thereby pushing the thrust piston to move downwards, returning the oil in the second oil cavity below the thrust piston to the oil tank through the second oil path, the third oil path and the second electromagnetic valve, driving the top sleeve to move towards the rubber sleeve along the guide sleeve by the downward movement of the thrust piston, when the lower end surface of the second thrust piston body is in contact with the upper end surface of the sealing piston, the control system controls the motor to stop rotating, the first one-way valve enables the oil way system to be closed, the pressure is kept unchanged, and therefore the rubber cylinder expands to achieve the setting effect;
(3) deblocking
The control system controls the motor to rotate reversely, the rotating shaft of the motor drives the rotating shaft of the plunger pump to rotate, the control system controls the inlet end and the second outlet end of the first electromagnetic valve to be in an open state, the control system controls the second electromagnetic valve to be in a closed state, the control system controls the third electromagnetic valve to be in an open state, oil in the first oil cavity at the upper end of the thrust piston is injected into an oil tank through a fourth oil way, a third oil way communicated with the fourth oil way and the third electromagnetic valve, the oil in the oil tank is injected into the second oil cavity through the pump body, the first electromagnetic valve and the second oil way, so that the thrust piston moves upwards, the thrust piston moves upwards to drive the top sleeve to move towards the direction far away from the rubber cylinder along the guide sleeve, when the upper end surface of the first thrust piston body is in contact with the inner surface of the upper end of the first connecting body, the control system controls the motor to stop rotating, the first one-way valve seals the oil way system and keeps the pressure unchanged, thereby the rubber cylinder shrinks to achieve the deblocking effect;
(4) demolish the electronic packet
And taking out the electric packer from the specified depth underground through oilfield equipment, and waiting for the next use.
The invention has the beneficial effects that: simple structure, convenient operation, low cost, time and labor saving and repeated use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1;
FIG. 4 is an enlarged schematic view of portion A of FIG. 3;
FIG. 5 is an enlarged schematic view of portion C of FIG. 1;
FIG. 6 is a schematic view of a setting circuit of the present invention; (ii) a
Fig. 7 is a schematic view of the deblocking circuit of the present invention.
The labels in the figure are: 1. the hydraulic pump comprises a first joint, a central pipe, a motor, a connecting piece, a plunger pump, a guide sleeve, a top sleeve, a rubber cylinder, a rubber sleeve, a fixing sleeve, a cover, a motor stator, a motor rotor, a motor shell, a motor rotating shaft, a pump shell, a swash plate, a plunger component, a pump body, a third sealing ring, a first rubber cylinder pressing ring, a second rubber cylinder pressing ring, a motor stator, a motor rotor, a motor shell, a motor rotating shaft, a pump shell, a swash plate, a piston component, a pump body, a rotating shaft, a pump shell, a swash plate, a pump shell, a pump body, a, 5223. the first sealing ring 5225, the second sealing ring 5226, the first oil chamber 5227, the second oil chamber 5231, the first solenoid valve 5232, the second check valve 5251, the second solenoid valve 5261, the third solenoid valve 5271, the overflow check valve 5281, the first check valve 52211, the first connecting body 52212, the second connecting body 52221, the base 52222, the first sealing body 52223, the second sealing body 52231, the first thrust piston body 52232, the second thrust piston body 52233 and the third thrust piston body 52233.
Detailed Description
The invention is further described below in conjunction with the drawings and the specific embodiments to assist in understanding the contents of the invention.
As shown in fig. 1-7, the electric packer is provided with a central tube 2, the central tube 2 is a cylindrical hollow tube, and the central tube 2 is sequentially sleeved with a motor 3, a plunger pump 5 and a guide sleeve 6.
Motor 3 is explosion-proof machine, and motor 3 is equipped with motor shaft 35, and motor shaft 35 is cylindrical hollow tube, and motor shaft 35's circumference is equipped with motor rotor 33, and motor rotor 33's the outside is equipped with motor stator 32, and motor stator 32 circumference is equipped with motor housing 34, and motor 3's upper and lower both ends are equipped with end cover 31 respectively, and motor 3 overlaps through motor shaft 35 cover and establishes on center tube 2.
One end of the motor 3, which is far away from the plunger pump 5, is provided with a first joint 1, and the first joint 1 is sleeved on the end part of the central tube 2 and is connected with a corresponding end cover 31 of the motor.
Plunger pump 5 is equipped with axis of rotation 51, the axis of rotation 51 of plunger pump 5 links to each other with the pivot 35 spline of motor, plunger pump 5 establishes on center tube 2 through axis of rotation 51 cover, plunger pump 5 still is equipped with pump casing 52, be equipped with connecting piece 4 between pump casing 52 of plunger pump 5 is close the one end of motor 3 and the corresponding end cover 31 of motor 3, 2 circumferences of center tube between motor 3 and plunger pump 5 are established to connecting piece 4 cover, the one end of connecting piece 4 links to each other with the corresponding end cover 31 of motor 3, the other end of connecting piece 4 links to each other with pump casing 52 of plunger pump 5.
The one end that motor shaft 35 was kept away from to axis of rotation 51 of plunger pump 5 is equipped with sloping cam plate 53, the lower terminal surface of sloping cam plate 53 is equipped with the plunger subassembly 54 that the cooperation was used, the one end that sloping cam plate 53 was kept away from to plunger subassembly 54 is equipped with the pump body 55, the lower extreme of pump body 55 is equipped with the second annular groove that uses with the cooperation of uide bushing 6, the second annular groove is to the direction extension formation of keeping away from center tube 2, the second annular groove is the tourus, the second annular groove in the center tube 2 outside is established to the upper end of uide bushing 6.
A closed oil tank 521 is arranged in the pump shell 52 at the upper end of the swash plate 53, the oil tank 521 is circular, and a lower cavity 522 is arranged in the pump shell 52 at the lower end of the pump body 55.
The lower cavity 522 is provided with a connecting sleeve 5221, a sealing piston 5222 and a thrust piston 5223, the connecting sleeve 5221 is provided with a first connecting body 52211 and a second connecting body 52212, the first connecting body 52211 is a circular ring body with a closed upper end, the second connecting body 52212 is a circular ring body, the upper end surface of the second connecting body 52212 is connected with the lower end surface of the first connecting body 52211, and the width of the second connecting body 52212 is smaller than the width of the lower end surface of the first connecting body 52211.
The seal piston 5222 is provided with a base 52221, a first seal body 52222 and a second seal body 52223, the base 52221 is an annular body, the first seal body 52222 is an annular body, the second seal body 52223 is arranged at the inner side position of the upper surface of the base 52221, the first seal body 52222 is arranged at the outer side position of the upper surface of the base 52221, the outer circle diameter of the first seal body 52222 is equal to the outer circle diameter of the base 52221, the inner circle diameter of the second seal body 52223 is equal to the inner circle diameter of the base 52221, the sum of the width of the annular body of the second seal body 52223 and the width of the first seal body 52222 is smaller than the width of the annular body of the base 52221, the height of the annular body of the second seal body 52223 is smaller than the height of the annular body of the third seal body 52223, namely, a third annular groove is arranged between the second seal body 52222 and the third seal body, and the third annular groove is annular body.
The second connection body 52212 of the connection sleeve 5221 is inserted into the third annular groove.
The thrust piston 5223 is provided with a first thrust piston body 52231, a second thrust piston body 52232 and a third thrust piston body 52233, the first thrust piston body 52231 is a torus, the second thrust piston body 52232 is a torus, the third thrust piston body 52233 is a torus, the first thrust piston body 52231 is disposed at a position outside the upper surface of the second thrust piston body 52232, the third thrust piston body 52233 is at a position inside the lower surface of the second thrust piston body 52232, the outer diameter of the first thrust piston body 52231 is equal to the outer diameter of the second thrust piston body 52232, the inner diameter of the third thrust piston body 52233 is equal to the inner diameter of the second thrust piston body 52232, the torus width of the third thrust piston body 52233 is less than the torus width of the second thrust piston body 52232, and the torus width of the first thrust piston body 52231 is less than the torus width of the second thrust piston body 52232.
The outer side surface of the lower end of the third thrust piston body 52233 is provided with a fourth annular groove recessed toward the center tube 2, and the fourth annular groove is annular.
The first thrust piston body 52233 is provided with a first annular groove extending in a direction away from the center tube 2 at an upper end of an inner side wall close to the center tube 2, and the longitudinal section of the first annular groove is in an inverted truncated cone shape.
The lower surface of the base 52221 is provided with a top sleeve 7, the top sleeve 7 is a circular ring body with the upper end and the lower end closed, the upper surface of the top sleeve 7 is connected with the lower surface of the base 52221, the inner side surface of the upper end of the top sleeve 7 is connected with the fourth annular groove of the third thrust piston body 52233, and the position above the fourth annular groove of the third thrust piston body 52233 is clamped between the outer side surface of the guide sleeve 6 and the inner side surface of the third thrust piston body 52233.
A third sealing ring 71 is arranged between the inner side surface of the lower end of the top sleeve 7 and the outer circle side surface of the first fixing body 91.
The second thrust piston body 52232 is sleeved with a first sealing ring 5224, and the second sealing body 52223 is sleeved with a second sealing ring 5225.
Preferably, O-rings are used as the first seal ring 5224, the second seal ring 5225 and the third seal ring 71.
A first oil chamber 5226 for containing oil is formed between the inner side wall of the first thrust piston body 52231, the upper end surface of the second thrust piston body 52232 and the outer side wall of the guide sleeve 6, and a second oil chamber 5227 is formed between the outer side wall of the third thrust piston body 52233, the upper end surface of the second sealing body 52223 and the inner side wall of the first connecting body 52211.
The first annular groove of the first thrust piston body 52233 is of a reverse truncated shape, and can increase the pressure in the first oil chamber 5226.
The pump body 55 is provided with an oil inlet 551 and an oil outlet 552, the oil inlet 551 of the pump body 55 is connected with the oil tank 521 through a sixth oil path 528, the sixth oil path 528 is provided with a first one-way valve 5281, the oil outlet 552 of the pump body 55 is connected with the first oil chamber 5226 through a first oil path 523, the first oil path 523 is provided with a first solenoid valve 5231, the first solenoid valve 5231 is a two-position three-way solenoid valve, the first solenoid valve 5231 is provided with an inlet end, a first outlet end and a second outlet end, a second one-way valve 5232 is arranged between the inlet end of the first solenoid valve 5231 and the outlet end 522 of the pump body 55, the first outlet end of the first solenoid valve 5231 is connected with the first oil chamber 5226, the second outlet end of the first solenoid valve 5231 is connected with the second oil chamber 5227 through a second oil path 524, the second oil path 524 is arranged in the first connecting body 52211, the second oil path 524 is U-shaped, one end of the second oil path 524 close to the first solenoid valve 5231 is provided with a third oil path 525 communicated with the oil tank 521, a second solenoid valve 5251 is provided in the third oil passage 525, a fourth oil passage 526 is provided between the outlet end of the second solenoid valve 5251 and the first outlet end of the first solenoid valve 5231, and a third solenoid valve 5261 is provided in the fourth oil passage 526.
A fifth oil passage 527 is arranged between the first oil passage 523 and the third oil passage 525, one end of the fifth oil passage 527 is communicated with the first oil passage 523 between the outlet end of the second check valve 5232 and the inlet end of the first solenoid valve 5231, the other end of the fifth oil passage 527 is communicated with the third oil passage 525 between the oil tank 521 and the second solenoid valve 5251, and the fifth oil passage 527 is provided with an overflow check valve 5271 which can enable the first oil chamber 5226 and/or the second oil chamber 5227 to be communicated with the oil tank 521.
The guide sleeve 6 is sleeved on the circumference of the central tube 2, the upper end of the guide sleeve 6 is arranged in the pump body 55, the guide sleeve 6 extends in the direction away from the motor 3, and the circumference of the lower end of the guide sleeve 6 is provided with a fixed sleeve 9.
Fixed cover 9 is equipped with first fixed body 91, second fixed body 92 and block body 93, first fixed body 91 is the tourus, second fixed body 92 is the tourus, block body 93 is the tourus, the lower terminal surface of first fixed body 91 links to each other with the up end outside of second fixed body 92, the tourus width of first fixed body 91 is less than the tourus width of second fixed body 92, the excircle diameter of first fixed body 91 and second fixed body 92 equals, the interior circle diameter of first fixed body 91 more than or equal to the excircle diameter of uide bushing 6, the interior circle cover of first fixed body 91 is established on the excircle of uide bushing 6, block body 93 and establish the one end of keeping away from top cover 7 at second fixed body 92, be equipped with at least one packing element 8 between block body 93 up end and the top cover 7, packing element 8 is the tourus, be equipped with the steel ring between the adjacent packing element 8.
The end part sleeve that packing element 8 and top cover 7 cooperate to use is equipped with first packing element clamping ring 81, and the end part that packing element 8 and stopper 93 cooperate to use is equipped with second packing element clamping ring 82.
The control system is provided with a programmable controller or an industrial personal computer, the input end of the programmable controller or the industrial personal computer is connected with the control button through a lead, the output end of the programmable controller or the industrial personal computer is connected with the first solenoid valve 5231, the second solenoid valve 5251 and the third solenoid valve 5261 through leads and a relay switching loop, and the control system controls the thrust piston 5223 and the top sleeve 7 to move in the direction far away from or close to the rubber cylinder 8 by controlling the rotation direction of the motor 3.
The control system is provided with a current transformer, the current transformer is sleeved on a power line of the motor 3 and is an analog quantity signal, the current transformer is connected with an analog quantity signal end of the programmable controller or the industrial personal computer, the programmable controller or the industrial personal computer confirms whether the current of the motor 3 is larger than a set current or not according to the signal of the current transformer, if the current is larger than the set current, the programmable controller or the industrial personal computer sends a signal to the motor 3, and the motor 3 stops, so that the plunger pump 5 stops working.
The first piston body 52231 and the second piston body 52232 of the thrust piston 5223 can move back and forth between the inner side surface of the upper end of the first connecting body 52211 and the upper end surface of the second sealing body 52223, and at the time of setting, when the lower end surface of the second thrust piston body 52232 is in contact with the upper end surface of the second sealing body 52223, setting is completed; the unsealing is completed when the upper end surface of the first thrust piston body 52231 comes into contact with the upper inner surface of the first connector 52211.
An electric packer packing method, comprising the steps of:
(1) electric packer for installation
Sending the electric packer to a specified depth underground through oilfield equipment, and connecting the electric packer with commercial power on an oilfield site;
(2) setting seal
The control system controls the motor 3 to rotate forwards through the control button, the motor rotating shaft 35 drives the rotating shaft 51 of the plunger pump 5 to rotate, the control system controls the inlet end and the first outlet end of the first solenoid valve 5231 to be in an open state, the control system controls the second solenoid valve 5251 to be in an open state, the control system controls the third solenoid valve 5261 to be in a closed state, oil in the oil tank 521 enters the inlet end of the main pump body 55 through the first check valve 5281, the pump body 55 works to convey the oil to the inlet end of the first solenoid valve 5231 and then flows into the first oil cavity 5226 through the outlet end of the first solenoid valve 5231, so that the thrust piston 5223 is pushed to move downwards, the oil in the second oil cavity 5227 below the thrust piston 5223 returns to the oil tank through the second oil passage 524, the third oil passage 525 and the second solenoid valve 5251, the thrust piston 5223 moves downwards to drive the top sleeve 7 to move towards the rubber cylinder 8 along the sealing body guide sleeve 6, and when the lower end surface of the second thrust piston body 52232 is in contact with the upper end surface of the second 52223, when the current of the current transformer is increased, the programmable controller or the industrial personal computer sends a signal to the motor 3, the motor 3 stops working, so that the plunger pump 5 stops working, the oil way system is closed through the second check valve 5232 and/or the first check valve 5281, the pressure is kept unchanged, and the compression rubber cylinder 8 is expanded to achieve the setting effect;
(3) deblocking
The control system controls the motor 3 to reversely rotate through the control button, the rotating shaft 35 of the motor 3 drives the rotating shaft 51 of the plunger pump 5 to rotate, the control system controls the inlet end and the second outlet end of the first solenoid valve 5231 to be in an open state, the control system controls the second solenoid valve 5251 to be in a closed state, the control system controls the third solenoid valve 5261 to be in an open state, oil in the first oil chamber 5226 at the upper end of the thrust piston 5223 is injected into the oil tank 521 through the third oil passage 525 and the third solenoid valve 5261 which are communicated with the fourth oil passage 526 through the fourth oil passage 526, the oil in the oil tank 521 is injected into the second oil chamber 5227 through the pump body 55, the first solenoid valve 5231 and the second oil passage 524, so that the thrust piston 5223 moves upwards, the thrust piston 5223 moves upwards to drive the top sleeve 7 to move away from the rubber cylinder 8 along the guide sleeve 6, when the upper end surface of the first thrust piston 52231 is in contact with the inner side surface of the upper end of the first connecting body 52211, when the current of the current transformer is increased, the programmable controller or the industrial personal computer sends a signal to the motor 3, the motor 3 stops working, so that the plunger pump 5 stops working, the oil way system is sealed through the second check valve 5232 and/or the first check valve 5281, the pressure is kept unchanged, and the rubber cylinder 8 contracts to achieve the deblocking effect;
(4) demolish the electronic packet
And taking out the electric packer from the specified depth underground through oilfield equipment, and waiting for the next use.
It should be noted that as used in the foregoing description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
However, the above description is only exemplary of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.
Claims (7)
1. An electronic packer which characterized in that: comprises a central tube and a control system, the central tube is a hollow tube, the circumference of the central tube is sequentially sleeved with a motor, a plunger pump and a guide sleeve, the rotating shaft of the plunger pump is connected with the rotating shaft of the motor, one end of the guide sleeve, which is close to the motor, extends into the plunger pump, the circumference of the guide sleeve in the plunger pump is provided with a thrust piston capable of moving up and down, the circumference of one end of the guide sleeve, which is far away from the motor, is provided with a fixed sleeve used in a matched manner, the fixed sleeve is in a cylindrical shape, one end of the fixed sleeve, which is far away from the guide sleeve, is provided with a blocking body protruding out of the cylindrical body, the circumference of the fixed sleeve between the blocking body and the plunger pump is sleeved with at least one rubber cylinder, a top sleeve is arranged between the rubber cylinder and the thrust piston, one end of the top sleeve is sleeved on the circumference of the guide sleeve and is connected with the thrust piston, the other end of the top sleeve is sleeved on the circumference of the fixed sleeve between the rubber cylinder and the thrust piston, the control system controls the thrust piston and the top sleeve to move in the direction far away from or close to the rubber cylinder by controlling the rotation direction of the motor;
the plunger pump is further provided with a pump body, a closed oil tank and a lower cavity are correspondingly arranged on the circumferences of central pipes at the upper end and the lower end of the pump body, the upper end part of the thrust piston can be movably arranged in the inner cavity of the lower cavity along a guide sleeve up and down, an oil inlet of the pump body is connected with the oil tank through a sixth oil path, a first check valve is arranged on the sixth oil path, a first oil path is arranged at the upper end position of the thrust piston in the lower cavity corresponding to the oil outlet of the pump body, a first electromagnetic valve is arranged on the first oil path, the first electromagnetic valve is a two-position three-way electromagnetic valve, the inlet end of the first electromagnetic valve is connected with the outlet end of the pump body, the first outlet end of the first electromagnetic valve is communicated with the upper end position of the thrust piston, a second oil path connected with the lower end position of the thrust piston is arranged at the second outlet end of the first electromagnetic valve, and a third oil path communicated with the oil tank is arranged at one end, which is close to the first electromagnetic valve, a second electromagnetic valve is arranged on the third oil path, a fourth oil path is arranged between the outlet end of the second electromagnetic valve and the first outlet end of the first electromagnetic valve, and a third electromagnetic valve is arranged on the fourth oil path;
the thrust piston is provided with a first thrust piston body, a second thrust piston body and a third thrust piston body, the first thrust piston body, the second thrust piston body and the third thrust piston body are respectively annular bodies, the first thrust piston body is arranged at the upper end of the second thrust piston body and is far away from the position of the central pipe, the third thrust piston body is arranged at the lower end of the second thrust piston body and is close to the position of the central pipe, the width of the first thrust piston body is smaller than that of the second thrust piston body, the width of the third thrust piston body is smaller than that of the second thrust piston body, a first oil cavity for containing oil is formed between the inner side wall of the first thrust piston body, the upper end surface of the second thrust piston body and the outer side wall of the guide sleeve, a second oil cavity is formed between the outer side wall of the third thrust piston body and the inner side wall of the lower cavity, and one end of the second oil channel, which is far away from the first electromagnetic valve, is communicated with the second oil cavity, a first outlet end of the first electromagnetic valve is communicated with the first oil chamber through a first oil way;
and a fifth oil way is arranged between the first oil way and the third oil way, one end of the fifth oil way is communicated with the first oil way between the outlet end of the first check valve and the inlet end of the first electromagnetic valve, the other end of the fifth oil way is communicated with the third oil way between the oil tank and the second electromagnetic valve, and an overflow check valve which can lead the lower cavity to be communicated with the oil tank is arranged on the fifth oil way.
2. The electrically powered packer of claim 1, wherein: the motor shaft is hollow rotating shaft, the axis of rotation of plunger pump is hollow axis of rotation, the hollow pivot cover that the motor passes through the motor is established and is corresponded the position at the center tube circumference, the hollow axis of rotation cover that the plunger pump passes through the plunger pump is established and is corresponded the position at the center tube circumference, the axis of rotation splined connection of motor shaft and plunger pump.
3. The electrically powered packer of claim 2, wherein: the end cover that packing element and top cover cooperation were used is equipped with first packing element clamping ring, the packing element is equipped with second packing element clamping ring with the tip that blocks the body cooperation and use.
4. The electrically powered packer of claim 3, wherein: the motor is close to the center tube, and one pot head that the center tube is close to the motor is equipped with first joint, first joint links to each other with the motor tip.
5. The electrically powered packer of claim 1, wherein: the lower cavity is provided with a connecting sleeve, the connecting sleeve is provided with a first connecting body and a second connecting body, the first connecting body is an annular body with a closed upper end, the second connecting body is an annular body, the upper end face of the second connecting body is connected with the lower end face of the first connecting body, the lower end of the second connecting body is provided with a sealing piston matched with a third thrust piston body for use, the second thrust piston body is provided with a first sealing ring, and the sealing piston is sleeved with a second sealing ring.
6. The electrically powered packer of claim 1, wherein: the upper end of the inner side wall of the first thrust piston body, which is close to the central tube, is provided with a first annular groove extending in the direction away from the central tube, and the longitudinal section of the first annular groove is in an inverted frustum shape.
7. The method of any one of claims 1 to 6, wherein: the method comprises the following steps:
(1) electric packer for installation
Sending the electric packer to a specified depth underground through oilfield equipment, and connecting the electric packer with commercial power on an oilfield site;
(2) setting seal
The control system controls the motor to rotate forwards, the rotating shaft of the motor drives the rotating shaft of the plunger pump to rotate, the control system controls the inlet end and the first outlet end of the first electromagnetic valve to be in an open state, the control system controls the second electromagnetic valve to be in an open state, the control system controls the third electromagnetic valve to be in a closed state, oil in the oil tank is injected into a first oil cavity at the upper end of the thrust piston through the first oil way and the first electromagnetic valve, thereby pushing the thrust piston to move downwards, returning the oil in the second oil cavity below the thrust piston to the oil tank through the second oil path, the third oil path and the second electromagnetic valve, driving the top sleeve to move towards the rubber sleeve along the guide sleeve by the downward movement of the thrust piston, when the lower end surface of the second thrust piston body is in contact with the upper end surface of the sealing piston, the control system controls the motor to stop rotating, the first one-way valve enables the oil way system to be closed, the pressure is kept unchanged, and therefore the rubber cylinder expands to achieve the setting effect;
(3) deblocking
The control system controls the motor to rotate reversely, the rotating shaft of the motor drives the rotating shaft of the plunger pump to rotate, the control system controls the inlet end and the second outlet end of the first electromagnetic valve to be in an open state, the control system controls the second electromagnetic valve to be in a closed state, the control system controls the third electromagnetic valve to be in an open state, oil in the first oil cavity at the upper end of the thrust piston is injected into an oil tank through a fourth oil way, a third oil way communicated with the fourth oil way and the third electromagnetic valve, the oil in the oil tank is injected into the second oil cavity through the pump body, the first electromagnetic valve and the second oil way, so that the thrust piston moves upwards, the thrust piston moves upwards to drive the top sleeve to move towards the direction far away from the rubber cylinder along the guide sleeve, when the upper end surface of the first thrust piston body is in contact with the inner surface of the upper end of the first connecting body, the control system controls the motor to stop rotating, the first one-way valve seals the oil way system and keeps the pressure unchanged, thereby the rubber cylinder shrinks to achieve the deblocking effect;
(4) demolish the electronic packet
And taking out the electric packer from the specified depth underground through oilfield equipment, and waiting for the next use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810333451.5A CN110374544B (en) | 2018-04-13 | 2018-04-13 | Electric packer and packing method thereof |
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| CN201810333451.5A CN110374544B (en) | 2018-04-13 | 2018-04-13 | Electric packer and packing method thereof |
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| CN110374544B true CN110374544B (en) | 2021-11-05 |
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| CN208024325U (en) * | 2018-04-13 | 2018-10-30 | 威海鸿通管材股份有限公司 | A kind of electric packer |
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| CN2185319Y (en) * | 1994-02-03 | 1994-12-14 | 常州环宇盘式电机有限公司 | Electric compressed underground packer |
| US8215410B2 (en) * | 2007-10-08 | 2012-07-10 | Power Feed-Thru Systems & Connectors, Llc | Apparatus and method for electrical packer feedthrough |
| CN104653146A (en) * | 2015-02-08 | 2015-05-27 | 孔涛 | Electric control packer |
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Denomination of invention: An electric packer and its sealing method Effective date of registration: 20230704 Granted publication date: 20211105 Pledgee: Agricultural Bank of China Limited Weihai Wendeng sub branch Pledgor: WEIHAI HONGTONG PIPING MATERIALS Co.,Ltd. Registration number: Y2023980047301 |