CN111980632B - Reciprocating oil pumping device of submersible motor - Google Patents
Reciprocating oil pumping device of submersible motor Download PDFInfo
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- CN111980632B CN111980632B CN202010846949.9A CN202010846949A CN111980632B CN 111980632 B CN111980632 B CN 111980632B CN 202010846949 A CN202010846949 A CN 202010846949A CN 111980632 B CN111980632 B CN 111980632B
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- oil
- electromagnetic clutch
- fixedly connected
- valve body
- screw rod
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention discloses a reciprocating oil pumping device of an oil-submersible motor, which relates to the technical field of oil exploitation.A rotor of the oil-submersible motor is fixedly connected with an upper transmission sleeve and a lower transmission sleeve at the upper end and the lower end respectively; the driving end of the upper electromagnetic clutch is fixedly connected with the upper end of the upper transmission sleeve in the circumferential direction, the driven end of the upper electromagnetic clutch is fixedly connected with an upper screw nut, and the upper screw is in threaded connection with the upper screw nut; the driving end of the lower electromagnetic clutch is fixedly connected with the lower end of the lower transmission sleeve in the circumferential direction, the driven end of the lower electromagnetic clutch is fixedly connected with a lower screw nut, and the lower screw is in threaded connection with the lower screw nut; the screw thread turning directions of the upper screw rod and the lower screw rod are opposite, the upper screw rod and the lower screw rod are limited to rotate circumferentially, and the lower end of the plunger of the oil pump is axially and fixedly connected with the upper end of the upper screw rod. The oil-submersible motor is prevented from being started by frequent reversing, can be started under pressure, has small starting torque, improves the reliability of the motor, and reduces the production cost of the motor.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a reciprocating oil pumping device of an oil-submersible motor.
Background
The submersible motor screw reciprocating oil well pump is being popularized and used with the advantages of simplicity, reliability and the like, but the following problems occur in practical application: (1) the motor needs frequent reversing starting, the stress is very uneven in the working process of the motor, and the service life and the reliability of the motor are greatly influenced; (2) due to the influence of the liquid column pressure, the motor needs high starting torque, the motor cost is increased, and energy loss is caused; (3) the pressure energy of the underground reservoir is not well utilized. Due to the problems, the popularization and the application of the oil-submersible motor screw reciprocating plunger oil well pump are limited.
Patent 201510561759.1, "a submersible oil pump unit with downhole driving conversion device", is to utilize the driving conversion device of reciprocating load balance (depending on spring force), make the control cabinet realize the motor reversal depending on the set load value, thus drive the reciprocating motion of the oil pump plunger, patent 201420610500.2 "the reciprocating submersible motor plunger pump of screw drive" adopts the switch reluctance motor that can be rotated forward and backward and spiral drive mechanism to combine and drive the reciprocating plunger pump, patent 201420520336.6 "always intelligent control ball screw submersible pump" is also the periodic forward and backward rotation of the submersible motor, drive the plunger to reciprocate up and down through the ball screw; the reciprocating motion of the plunger of the oil well pump is realized by utilizing the direction change of the motor in the above technologies, the motor is frequently started in a reversing way, the service life of the motor is influenced, and the problem of starting the submersible motor under pressure is not solved. Patent 201410562715.6 "spiral reciprocating type downhole oil extraction device" explains that the reciprocating motion of the plunger is realized by reversing with the bidirectional reciprocating lead screw, although the motor does not need to be started by frequent reversing, the bidirectional reciprocating lead screw is temporarily stopped during reversing, the reversing process is not stable, the noise vibration is large, meanwhile, the bidirectional reciprocating lead screw requires that the rotating speed of the motor is very low (namely the stage number of the motor is very large), the cost of the submersible motor is invisibly increased, and the problem of starting the motor under pressure is also not solved in the technology.
Disclosure of Invention
The invention aims to provide a reciprocating oil pumping device of an oil-submersible motor, which solves the problems in the prior art, avoids frequent reversing starting of the oil-submersible motor, can be started under pressure, has small starting torque, improves the reliability of the motor and reduces the production cost of the motor.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a reciprocating oil pumping device of an oil-submersible motor, which comprises an oil-submersible motor rotor, an intermediate shaft, an upper transmission sleeve, a lower transmission sleeve, an upper electromagnetic clutch, a lower electromagnetic clutch, an upper screw rod, a lower screw rod, an upper screw rod anti-rotation device, a lower screw rod anti-rotation device and a reciprocating oil well pump, wherein the upper screw rod is fixedly connected with the intermediate shaft;
the upper end and the lower end of the submersible motor rotor are respectively and fixedly connected with the upper transmission sleeve and the lower transmission sleeve in a coaxial mode, the submersible motor rotor is arranged in a hollow mode, the middle shaft penetrates through the submersible motor rotor, the upper end of the middle shaft extends into the upper transmission sleeve and is fixedly connected with the lower end of the upper screw rod in a coaxial mode, and the lower end of the middle shaft extends into the lower transmission sleeve and is fixedly connected with the upper end of the lower screw rod in a coaxial mode;
the upper electromagnetic clutch comprises an upper electromagnetic clutch driving end and an upper electromagnetic clutch driven end, the upper electromagnetic clutch can be combined with or separated from the upper electromagnetic clutch driven end respectively when the upper electromagnetic clutch is powered on or powered off, the upper electromagnetic clutch is sleeved outside the upper screw rod, the upper electromagnetic clutch driving end is circumferentially and relatively fixedly connected with the upper end of the upper transmission sleeve, the upper electromagnetic clutch driven end is coaxially and fixedly connected with an upper screw rod nut, and the upper screw rod is in threaded connection with the upper screw rod nut;
the lower electromagnetic clutch comprises a lower electromagnetic clutch driving end and a lower electromagnetic clutch driven end, the lower electromagnetic clutch can be combined with or separated from the lower electromagnetic clutch driving end and the lower electromagnetic clutch driven end respectively when the lower electromagnetic clutch is switched on or off, the lower electromagnetic clutch is sleeved outside the lower screw rod, the lower electromagnetic clutch driving end is circumferentially and relatively fixedly connected with the lower end of the lower transmission sleeve, the lower electromagnetic clutch driven end is coaxially and fixedly connected with a lower screw rod nut, and the lower screw rod is in threaded connection with the lower screw rod nut;
the upper screw anti-rotation device can limit the upper screw to rotate, and the lower screw anti-rotation device can limit the lower screw to rotate;
the thread turning directions of the upper lead screw and the lower lead screw are opposite;
the reciprocating oil well pump comprises an oil pump plunger, the lower end of the oil pump plunger is fixedly connected with the upper end of the upper screw rod, and the reciprocating motion of the oil pump plunger can enable the reciprocating oil well pump to finish oil absorption and oil discharge processes.
Preferably, the upper screw rotation preventing device comprises an upper joint and an upper joint guide sleeve, the lower end of the upper joint is fixedly connected with the upper end of the upper screw, the upper end of the upper joint is fixedly connected with the lower end of the oil pump plunger, the upper joint is axially slidably arranged in the upper joint guide sleeve, and the upper joint guide sleeve can limit the upper joint to rotate; lead screw rotational lock includes lower clutch and lower clutch uide bushing down, the lower clutch upper end with lead screw lower extreme fixed connection down, the lower clutch sets up along endwise slip in the lower clutch uide bushing, the lower clutch uide bushing can restrict the lower clutch is rotatory.
Preferably, the submersible motor rotor is sleeved with a submersible motor shell, the upper transmission sleeve is sleeved with an upper transmission sleeve shell, the lower transmission sleeve is sleeved with a lower transmission sleeve shell, and the upper end and the lower end of the submersible motor shell are respectively fixedly connected with the lower end of the upper transmission sleeve shell and the upper end of the lower transmission sleeve shell in a sealing manner; an upper electromagnetic clutch shell is sleeved outside the driving end of the upper electromagnetic clutch and the driven end of the upper electromagnetic clutch, the upper end of the upper transmission sleeve shell is fixedly connected with the lower end of the upper electromagnetic clutch shell in a sealing manner, the upper end of the upper electromagnetic clutch shell is fixedly connected with the lower end of the upper joint guide sleeve in a sealing manner, and the upper end of the upper joint guide sleeve is fixedly connected with a pump cylinder of the reciprocating oil well pump in a sealing manner; electromagnetic clutch drive end down with electromagnetic clutch driven end overcoat is equipped with down the electromagnetic clutch shell, down drive sleeve shell lower extreme with the sealed fixed connection in electromagnetic clutch shell upper end down, electromagnetic clutch shell lower extreme down with the sealed fixed connection in lower clutch uide bushing upper end, the port seals under the lower clutch uide bushing.
Preferably, the reciprocating oil well pump further comprises a lower valve body, an upper valve body, a pump valve, a first oil outlet pipe, a second oil outlet pipe and an oil collecting pipe, wherein the pump cylinder of the reciprocating oil well pump comprises a first small pump cylinder, a large pump cylinder and a second small pump cylinder, the lower end of the first small pump cylinder is fixedly connected with the upper end of the upper joint guide sleeve in a sealing manner, the upper end of the first small pump cylinder is fixedly connected with the lower end of the lower valve body in a coaxial sealing manner, the upper end of the lower valve body is fixedly connected with the lower end of the large pump cylinder in a coaxial sealing manner, the upper end of the large pump cylinder is fixedly connected with the lower end of the upper valve body in a coaxial sealing manner, the upper end of the upper valve body is fixedly connected with the lower end of the second small pump cylinder in a coaxial sealing manner, the upper end of the second small pump cylinder is fixedly connected with the lower end of the oil collecting pipe in a coaxial sealing manner, the upper end of the oil collecting pipe is used for being connected with the oil pipe under the well, the upper end and the lower end of the first oil outlet pipe are respectively communicated with the oil collecting pipe and the oil discharge port of the lower valve body, the upper end and the lower end of the second oil outlet pipe are respectively communicated with the oil collecting pipe and the oil discharge port of the upper valve body, the pump valve is arranged in the upper valve body and the lower valve body and comprises a suction valve and a discharge valve, the suction valve is arranged at the oil suction ports of the upper valve body and the lower valve body, the discharge valve is arranged at the oil discharge ports of the upper valve body and the lower valve body, the oil pump plunger comprises small plungers at two ends and a large plunger which is arranged between the two small plungers and coaxially and fixedly connected with the two small plungers, the small plunger at the lower end is in the first small pump barrel in a sealing and sliding manner, the small plunger at the upper end is in the second small pump barrel in a sealing and sliding manner, and the lower end of the small plunger at the lower end penetrates through the first small pump barrel and is fixedly connected with the upper end of the upper joint, big plunger sealing sliding connection be in the big pump barrel, big plunger will big pump barrel separates for last working chamber and lower working chamber go up the valve body the suction valve with be equipped with the intercommunication between the discharge valve go up the working chamber with go up the last intercommunication passageway of valve body be equipped with the intercommunication down the valve body the suction valve with be equipped with the intercommunication between the discharge valve down the working chamber with the lower intercommunication passageway of valve body down.
Preferably, the driven end of the upper electromagnetic clutch is rotationally connected with the outer shell of the upper electromagnetic clutch through an upper electromagnetic clutch bearing; and the driven end of the lower electromagnetic clutch is rotationally connected with the lower electromagnetic clutch shell through a lower electromagnetic clutch bearing.
Preferably, an upper sealing groove is formed in the peripheral surface of the upper joint, an upper sealing ring is arranged in the upper sealing groove, and the upper joint is connected with the upper joint guide sleeve in a sealing manner through the upper sealing ring; the outer peripheral surface of the lower joint is provided with a lower sealing groove, a lower sealing ring is arranged in the lower sealing groove, and the lower joint is hermetically connected with the lower joint guide sleeve through the lower sealing ring.
Preferably, the suction valve and the discharge valve are both check valves, when the oil pump plunger moves upwards, oil in an oil well flows into the lower working chamber in a one-way mode through the suction valve in the lower valve body, and oil in the upper working chamber is discharged into the second oil outlet pipe in a one-way mode through the discharge valve in the upper valve body; when the oil pump plunger moves downwards, oil in the lower working cavity is discharged to the first oil outlet pipe in a one-way mode through the discharge valve in the lower valve body, and oil in an oil well flows to the upper working cavity in a one-way mode through the suction valve in the upper valve body.
Compared with the prior art, the invention achieves the following technical effects:
the invention provides a reciprocating oil pumping device of an oil-submersible motor, wherein the pressure of an oil pipe column always acts on an oil pump plunger, when the oil-submersible motor is started, an upper electromagnetic clutch and a lower electromagnetic clutch can cut off the pressure transmitted to the oil pump plunger to the oil-submersible motor, so that the oil pipe column pressure is not applied when the oil-submersible motor is started, the oil pipe column pressure is irrelevant to the starting of the oil-submersible motor, the oil pipe column pressure is not required to be unloaded, the oil-submersible motor can be started under pressure, and the oil-submersible motor can be started under smaller starting torque; after the submersible motor is started, the upper electromagnetic clutch and the lower electromagnetic clutch are alternately engaged and disengaged, so that the upper lead screw nut and the lower lead screw nut are alternately driven to rotate, the upper lead screw and the lower lead screw are limited to rotate due to the fact that threads of the upper lead screw and the lower lead screw are opposite in rotating direction, reciprocating linear motion of the upper lead screw and the lower lead screw can be driven, reciprocating motion of an oil pump plunger is driven, the oil absorption and oil discharge process is completed, the submersible motor is not required to be started in a frequently reversing mode, reciprocating motion of the oil pump plunger can be driven, reliability of the motor is improved, and production cost of the motor is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a submersible motor reciprocating pumping unit provided by the invention;
fig. 2 is a cross section a-a of the submersible motor reciprocating pumping unit of fig. 1;
fig. 3 is a section view of B-B of the submersible motor reciprocating oil pumping unit in fig. 1;
in the figure: 1-submersible motor rotor, 2-intermediate shaft, 3-upper transmission sleeve, 4-lower transmission sleeve, 5-upper electromagnetic clutch, 501-upper electromagnetic clutch driving end, 502-upper electromagnetic clutch driven end, 503-upper electromagnetic clutch housing, 504-upper electromagnetic clutch bearing, 6-lower electromagnetic clutch, 601-lower electromagnetic clutch driving end, 602-lower electromagnetic clutch driven end, 603-lower electromagnetic clutch housing, 604-lower electromagnetic clutch bearing, 7-upper lead screw, 8-lower lead screw, 9-reciprocating oil pump, 901-oil pump plunger, 9011-small plunger, 9012-large plunger, 902-pump barrel, 9021-first small pump barrel, 9022-large pump barrel, 9023-second small pump barrel, 903-lower valve body, 904-upper valve body, 905-pump valve, 9051-suction valve, 9052-discharge valve, 906-first oil outlet pipe, 907-second oil outlet pipe, 908-oil collecting pipe, 10-upper lead screw nut, 11-lower lead screw nut, 12-upper joint, 13-lower joint, 14-lower joint guide sleeve, 15-upper joint guide sleeve, 16-submersible motor shell, 17-upper transmission sleeve shell, 18-lower transmission sleeve shell, 19-upper working cavity, 20-lower working cavity, 21-upper sealing ring and 22-lower sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a reciprocating oil pumping device of an oil-submersible motor, which solves the problems in the prior art, avoids frequent reversing starting of the oil-submersible motor, can be started under pressure, has small starting torque, improves the reliability of the motor and reduces the production cost of the motor.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3, the present embodiment provides a reciprocating oil pumping device for an oil-submersible motor, which includes an oil-submersible motor mover 1, an intermediate shaft 2, an upper transmission sleeve 3, a lower transmission sleeve 4, an upper electromagnetic clutch 5, a lower electromagnetic clutch 6, an upper screw 7, a lower screw 8, an upper screw rotation prevention device, a lower screw rotation prevention device, and a reciprocating oil pump 9;
the upper end and the lower end of an oil-submersible motor rotor 1 are respectively and fixedly connected with an upper transmission sleeve 3 and a lower transmission sleeve 4 in a coaxial mode, the oil-submersible motor rotor 1 is arranged in a hollow mode, an intermediate shaft 2 penetrates through the oil-submersible motor rotor 1, the upper end of the intermediate shaft 2 extends into the upper transmission sleeve 3 and is fixedly connected with the lower end of an upper screw 7 in a coaxial mode, and the lower end of the intermediate shaft 2 extends into the lower transmission sleeve 4 and is fixedly connected with the upper end of a lower screw 8 in a coaxial mode;
the upper electromagnetic clutch 5 comprises an upper electromagnetic clutch driving end 501 and an upper electromagnetic clutch driven end 502, the upper electromagnetic clutch 5 can be combined with or separated from the upper electromagnetic clutch driven end 502 respectively when the upper electromagnetic clutch 5 is powered on or powered off, the upper electromagnetic clutch 5 is sleeved outside the upper screw 7, the upper electromagnetic clutch driving end 501 is circumferentially and relatively fixedly connected with the upper end of the upper transmission sleeve 3, the upper electromagnetic clutch driven end 502 is coaxially and fixedly connected with an upper screw nut 10, and the upper screw 7 is in threaded connection with the upper screw nut 10;
the lower electromagnetic clutch 6 comprises a lower electromagnetic clutch driving end 601 and a lower electromagnetic clutch driven end 602, the lower electromagnetic clutch 6 can be respectively combined with or separated from the lower electromagnetic clutch driving end 601 and the lower electromagnetic clutch driven end 602 when being powered on or powered off, the lower electromagnetic clutch 6 is sleeved outside the lower lead screw 8, the lower electromagnetic clutch driving end 601 is relatively and fixedly connected with the lower end of the lower transmission sleeve 4 in the circumferential direction, the lower electromagnetic clutch driven end 602 is coaxially and fixedly connected with a lower lead screw nut 11, and the lower lead screw 8 is in threaded connection with the lower lead screw nut 11;
the upper screw anti-rotation device can limit the rotation of the upper screw 7, and the lower screw anti-rotation device can limit the rotation of the lower screw 8;
the thread turning directions of the upper screw rod 7 and the lower screw rod 8 are opposite;
the reciprocating oil well pump 9 comprises an oil pump plunger 901, the lower end of the oil pump plunger 901 is fixedly connected with the upper end of the upper screw 7, and the reciprocating motion of the oil pump plunger 901 can enable the reciprocating oil well pump 9 to finish oil absorption and oil discharge processes.
When the submersible motor is started, the upper electromagnetic clutch 5 and the lower electromagnetic clutch 6 are powered off, the driving end 501 of the upper electromagnetic clutch is separated from the driven end 502 of the upper electromagnetic clutch, the driving end 601 of the lower electromagnetic clutch is separated from the driven end 602 of the lower electromagnetic clutch, although the oil pipe column pressure always acts on the oil pump plunger 901, the pressure transmitted to the submersible motor by the oil pump plunger can be cut off due to the power off of the upper electromagnetic clutch 5 and the lower electromagnetic clutch 6, so that the submersible motor is not subjected to the oil pipe column pressure when being started, the oil pipe column pressure is irrelevant to the starting of the submersible motor, the oil pipe column pressure is not required to be removed, the submersible motor can be started under pressure, and the submersible motor can be started under a smaller starting torque.
After the submersible motor is completely started, the position sensor matched with the upper lead screw 7 and the lower lead screw 8 transmits signals to the ground electrical control part, the ground electrical control part automatically judges whether to supply power to the upper electromagnetic clutch 5 or the lower electromagnetic clutch 6, wherein, the driving end 501 of the upper electromagnetic clutch is connected with the upper driving sleeve 3 in a sliding way, the driving end 601 of the lower electromagnetic clutch is connected with the lower driving sleeve 4 in a sliding way, the driven end 502 of the upper electromagnetic clutch and the driven end 602 of the lower electromagnetic clutch are both limited to move axially, when the active end 501 of the upper electromagnetic clutch is powered off or powered on according to the control requirement, the active end 501 of the upper electromagnetic clutch can slide for a certain distance along the axial direction while rotating together with the upper transmission sleeve 3, so as to press or loosen the friction plate of the upper electromagnetic clutch 5 to connect or disconnect the driving end 501 and the driven end 502 of the upper electromagnetic clutch; when the lower electromagnetic clutch driving end 601 is powered off or powered on according to a control requirement, the lower electromagnetic clutch driving end 601 can rotate together with the lower transmission sleeve 4 and can slide for a certain distance along the axial direction, so that a friction plate of the lower electromagnetic clutch 6 is pressed or loosened to connect or disconnect the lower electromagnetic clutch driving end 601 and the lower electromagnetic clutch driven end 602.
Assuming that the upper screw 7 and the lower screw 8 are located near the top dead center, power is supplied to the lower electromagnetic clutch 6, the upper electromagnetic clutch 5 is powered off, the driving end 601 of the lower electromagnetic clutch and the driven end 602 of the lower electromagnetic clutch are combined and fixed to rotate synchronously, the driven end 602 of the lower electromagnetic clutch is fixedly connected with the lower screw nut 11, the lower screw nut 11 and the lower screw 8 adopt a ball screw pair structure, the upper screw nut 10 and the upper screw 7 also adopt a ball screw pair structure, wherein, the driven end 602 of the lower electromagnetic clutch and the lower lead screw nut 11 can be selected to be manufactured integrally, thereby driving the lower lead screw nut 11 to drive the lower lead screw 8 to move downwards, the lower lead screw 8 drives the intermediate shaft 2 to move downwards, meanwhile, the upper screw 7 is driven to move downwards, at this time, the driven end 502 of the upper electromagnetic clutch and the upper screw nut 10 rotate passively, and the upper screw 7 drives the oil pump plunger 901 to move downwards.
When the upper screw 7 and the lower screw 8 move to the bottom dead center, the signal is transmitted to the ground electrical control part through the position sensor matched with the upper screw 7 and the lower screw 8, the ground electrical control part disconnects the power to the lower electromagnetic clutch 6, meanwhile, power is supplied to the upper electromagnetic clutch 5, the driving end 501 of the upper electromagnetic clutch and the driven end 502 of the upper electromagnetic clutch are combined, fixed and synchronously rotated, wherein, the driven end 502 of the upper electromagnetic clutch is fixedly connected with the upper lead screw nut 10, wherein, the driven end 502 of the upper electromagnetic clutch may alternatively be made integral with the upper screw nut 10, thereby drive upper screw nut 10 and drive upper screw 7 and up move, drive jackshaft 2 and up move simultaneously, also drive lower lead screw 8 and up move simultaneously, lower electromagnetic clutch driven end 602 and lower screw nut 11 are passive rotatory this moment, and upper screw 7 drives oil pump plunger 901 and up linear motion.
After the submersible motor is started, the upper electromagnetic clutch 5 and the lower electromagnetic clutch 6 are alternately engaged and disengaged, so that the submersible motor alternately drives the upper screw nut 10 and the lower screw nut 11 to rotate, the upper screw 7 and the lower screw 8 are opposite in thread turning direction and the upper screw 7 and the lower screw 8 are limited and cannot rotate, the upper screw 7 and the lower screw 8 can be driven to do reciprocating linear motion, the oil pump plunger 901 is driven to do reciprocating linear motion, the oil absorption and oil discharge process is completed, the submersible motor does not need to be frequently started in a reversing way, the reciprocating motion of the oil pump plunger 901 can be driven, the uniform stress of the submersible motor is ensured, the reliability of the motor is improved, and the production cost of the motor is reduced.
In this embodiment, the upper screw rotation preventing device includes an upper joint 12 and an upper joint guide sleeve 15, the lower end of the upper joint 12 is fixedly connected with the upper end of the upper screw 7, the upper end of the upper joint 12 is fixedly connected with the lower end of the oil pump plunger 901, the upper joint 12 is axially slidably disposed in the upper joint guide sleeve 15, and the upper joint guide sleeve 15 can limit the rotation of the upper joint 12; the lower screw anti-rotation device comprises a lower joint 13 and a lower joint guide sleeve 14, the upper end of the lower joint 13 is fixedly connected with the lower end of the lower screw 8, the lower joint 13 is arranged in the lower joint guide sleeve 14 in an axial sliding mode, and the lower joint guide sleeve 14 can limit the rotation of the lower joint 13.
An upper joint guide square hole is arranged in an upper joint guide sleeve 15, an upper joint 12 is a square joint matched with the upper joint guide square hole, the upper joint 12 is arranged in the upper joint guide square hole in a sliding manner, a lower joint guide square hole is arranged in a lower joint guide sleeve 14, a lower joint 13 is a square joint matched with the lower joint guide square hole, the lower joint 13 is arranged in the lower joint guide square hole in a sliding manner, the circumferential rotation of the upper joint 12 and the circumferential rotation of the lower joint 13 can be respectively limited through the upper joint guide square hole and the lower joint guide square hole, because the upper joint 12 is fixedly connected with an upper screw 7, the lower joint 13 is fixedly connected with a lower screw 8, the rotation of the upper screw 7 and the lower screw 8 is limited, when an oil submersible motor drives the upper screw nut 10 or the lower screw nut 11 to rotate, the upper screw 7 and the lower screw 8 linearly move along the axial direction, and the oil pump plunger 901 is driven to linearly move up and down, and finishing the oil absorption and oil discharge process.
In the embodiment, an oil-submersible motor shell 16 is sleeved outside an oil-submersible motor mover 1, an upper transmission sleeve shell 17 is sleeved outside an upper transmission sleeve 3, a lower transmission sleeve shell 18 is sleeved outside a lower transmission sleeve 4, and the upper end and the lower end of the oil-submersible motor shell 16 are respectively fixedly connected with the lower end of the upper transmission sleeve shell 17 and the upper end of the lower transmission sleeve shell 18 in a sealing manner; an upper electromagnetic clutch outer shell 503 is sleeved outside the driving end 501 and the driven end 502 of the upper electromagnetic clutch, the upper end of the upper transmission sleeve outer shell 17 is fixedly connected with the lower end of the upper electromagnetic clutch outer shell 503 in a sealing manner, the upper end of the upper electromagnetic clutch outer shell 503 is fixedly connected with the lower end of the upper joint guide sleeve 15 in a sealing manner, the upper end of the upper joint guide sleeve 15 is fixedly connected with a pump cylinder 902 of the reciprocating oil well pump 9 in a sealing manner, and particularly, the upper end of the upper joint guide sleeve 15 is fixedly connected with the lower end of a first small pump cylinder 9021 in a sealing manner; the lower electromagnetic clutch shell 603 is sleeved outside the lower electromagnetic clutch driving end 601 and the lower electromagnetic clutch driven end 602, the lower end of the lower transmission sleeve shell 18 is fixedly connected with the upper end of the lower electromagnetic clutch shell 603 in a sealing manner, the lower end of the lower electromagnetic clutch shell 603 is fixedly connected with the upper end of the lower joint guide sleeve 14 in a sealing manner, and the lower port of the lower joint guide sleeve 14 is closed.
The lower joint guide sleeve 14, the lower electromagnetic clutch shell 603, the lower transmission sleeve shell 18, the submersible motor shell 16, the upper transmission sleeve shell 17, the upper electromagnetic clutch shell 503 and the upper joint guide sleeve 15 are sequentially and fixedly connected in a sealing manner, the lower port of the lower joint guide sleeve 14 is sealed, the upper end of the upper joint guide sleeve 15 is fixedly connected with the pump barrel 902 of the reciprocating oil well pump 9 in a sealing manner, the connection sealing performance with the reciprocating oil well pump 9 is ensured, meanwhile, oil is prevented from entering the inner space where the intermediate shaft 2, the upper screw 7 and the lower screw 8 are located, and the submersible motor is ensured to normally operate.
In this embodiment, the reciprocating oil well pump 9 further includes a lower valve 903, an upper valve 904, a pump valve 905, a first oil outlet pipe 906, a second oil outlet pipe 907 and an oil collecting pipe 908, the pump barrel 902 of the reciprocating oil well pump 9 includes a first small pump barrel 9021, a large pump barrel 9022 and a second small pump barrel 9023, the lower end of the first small pump barrel 9021 is fixedly connected with the upper end of the upper connector guide sleeve 15 in a sealing manner, the upper end of the first small pump barrel 9021 is fixedly connected with the lower end of the lower valve 903 in a coaxial sealing manner, the upper end of the lower valve 903 is fixedly connected with the lower end of the upper valve 9022 in a coaxial sealing manner, the upper end of the large pump barrel 9022 is fixedly connected with the lower end of the upper valve 904 in a coaxial sealing manner, the upper end of the upper valve 904 is fixedly connected with the lower end of the second small pump barrel 9023 in a coaxial sealing manner, the upper end of the second small pump barrel 9023 is fixedly connected with the lower end of the oil collecting pipe 908 in a coaxial sealing manner, the lower end of the oil collecting pipe 908 is closed, the upper end of the oil collecting pipe is used for connecting with the lower oil outlet pipe 908 and the lower valve 903 in a lower valve 903, the upper end and the lower end of the second oil outlet pipe 907 are respectively communicated with oil discharge ports of the oil collecting pipe 908 and the upper valve body 904, pump valves 905 are respectively arranged in the upper valve body 904 and the lower valve body 903, each pump valve 905 comprises a suction valve 9051 and a discharge valve 9052, oil suction ports of the upper valve body 904 and the lower valve body 903 are respectively provided with a suction valve 9051, oil discharge ports of the upper valve body 904 and the lower valve body 903 are respectively provided with a discharge valve 9052, the oil pump plunger 901 comprises small plungers 9011 at two ends and a large plunger 9012 which is arranged between the two small plungers 9011 and coaxially and fixedly connected with the two small plungers 9011, the small plunger 9011 at the lower end is hermetically and slidably connected in the first small pump barrel 9021, the small plunger 9011 at the upper end is hermetically and slidably connected in the second small pump barrel 9023, the lower end of the small plunger 9011 at the lower end penetrates through the first small pump barrel 21 and is fixedly connected with the upper end of the upper connector 12, the large plunger 9012 is hermetically and slidably connected in the large pump barrel 22, and the large plunger 9012 divides the large pump barrel 9022 into an upper working cavity 19 and a lower working cavity 9020, an upper communication passage for communicating the upper working chamber 19 with the upper valve body 904 is provided between the suction valve 9051 and the discharge valve 9052 of the upper valve body 904, and a lower communication passage for communicating the lower working chamber 20 with the lower valve body 903 is provided between the suction valve 9051 and the discharge valve 9052 of the lower valve body 903.
The small plungers 9011 at both ends are integrated with the large plunger 9012, when the oil pump plunger 901 moves upward, the suction valve 9051 in the lower valve 903 opens and the discharge valve 9052 closes, the suction valve 9051 in the upper valve 904 closes and the discharge valve 9052 opens, oil in the oil well enters the lower valve 903 through the suction valve 9051 in the lower valve 903 and enters the lower working chamber 20 through the lower communication passage, oil in the upper working chamber 19 enters the upper valve 904 through the upper communication passage and is discharged into the second oil outlet pipe 907 through the discharge valve 9052 in the upper valve 904, and then oil is discharged into the oil collection pipe 908 through the second oil outlet pipe 907; when the oil pump plunger 901 moves downward, the suction valve 9051 in the lower valve body 903 is closed and the discharge valve 9052 is opened, the suction valve 9051 in the upper valve body 904 is opened and the discharge valve 9052 is closed, oil in the oil well enters the upper valve body 904 through the suction valve 9051 in the upper valve body 904 and enters the upper working chamber 19 through the upper communication passage, oil in the lower working chamber 20 enters the lower valve body 903 through the lower communication passage and is discharged into the first oil outlet pipe 906 through the discharge valve 9052 in the lower valve body 903, and then the oil is discharged into the oil collection pipe 908 through the first oil outlet pipe 906; oil in the oil collection pipe 908 is transported to the surface by the downhole tubing.
The upper working chamber 19 and the lower working chamber 20 respectively and alternately complete the oil suction and oil discharge processes when the oil pump plunger 901 reciprocates, and the oil is always discharged for the reciprocating oil well pump 9 and always bears the same discharge pressure for the submersible motor. Because the diameters D of the small plungers 9011 at the two ends of the oil pump plunger 901 are the same, and the diameters D of the small plungers 9011 at the two ends are smaller than the diameter D of the large plunger 9012 in the middle, no matter which end is in the discharge stroke, the suction pressure (reservoir pressure) at the other end pushes against the annular region of the end face of the large plunger 9012, namely the non-overlapped region of the connecting ends of the large plunger 9012 and the small plunger 9011, and the driving force of the oil pump plunger 901 in the discharge stroke, namely the driving force of the submersible motor, is always:
wherein, Ps: reservoir pressure, Pc: oil pump outlet pressure, D: large plunger diameter, F: submersible motor driving force, d: small plug diameter. In this case, the gravity and the friction of the moving part are relatively small and negligible. The oil reservoir pressure can be fully utilized, the submersible motor is guaranteed to be stressed uniformly, the service life of the submersible motor is prolonged, and the production cost is reduced.
In the present embodiment, the driven end 502 of the upper electromagnetic clutch is rotatably connected to the outer housing 503 of the upper electromagnetic clutch through an upper electromagnetic clutch bearing 504; the lower electromagnetic clutch driven end 602 is rotatably connected with the lower electromagnetic clutch housing 603 through a lower electromagnetic clutch bearing 604 and is connected through a bearing, the structure is simple, and the rotating processes of the upper electromagnetic clutch driven end 502 and the lower electromagnetic clutch driven end 602 are smoother.
In this embodiment, an upper sealing groove is formed on the outer peripheral surface of the upper joint 12, an upper sealing ring 21 is arranged in the upper sealing groove, and the upper joint 12 is connected with the upper joint guide sleeve 15 in a sealing manner through the upper sealing ring 21; the periphery of the lower joint 13 is provided with a lower sealing groove, a lower sealing ring 22 is arranged in the lower sealing groove, the upper joint 12 is connected with the upper joint guide sleeve 15 in a sealing mode through the lower sealing ring 22, and the sealing performance of the inner space between the upper joint 12 and the lower joint 13 is further guaranteed.
In this embodiment, the suction valve 9051 and the discharge valve 9052 are both check valves, and when the oil pump plunger 901 moves upward, oil in the oil well flows into the lower working chamber 20 in a one-way manner through the suction valve 9051 in the lower valve body 903, and oil in the upper working chamber 19 is discharged into the second oil outlet pipe 907 in a one-way manner through the discharge valve 9052 in the upper valve body 904; when the oil pump plunger 901 moves downward, oil in the lower working chamber 20 is discharged into the first oil outlet pipe 906 in one way through the discharge valve 9052 in the lower valve body 903, and oil in the oil well flows into the upper working chamber 19 in one way through the suction valve 9051 in the upper valve body 904. By setting the suction valve 9051 and the discharge valve 9052 as one-way valves, when the oil pump plunger 901 reciprocates, the oil suction and discharge processes can be automatically realized, and the structure is simple.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. The utility model provides a oily motor of diving reciprocal pumping unit which characterized in that: the oil-submersible pump comprises an oil-submersible motor rotor, an intermediate shaft, an upper transmission sleeve, a lower transmission sleeve, an upper electromagnetic clutch, a lower electromagnetic clutch, an upper screw rod, a lower screw rod, an upper screw rod anti-rotation device, a lower screw rod anti-rotation device and a reciprocating oil pump;
the upper end and the lower end of the submersible motor rotor are respectively and fixedly connected with the upper transmission sleeve and the lower transmission sleeve in a coaxial mode, the submersible motor rotor is arranged in a hollow mode, the middle shaft penetrates through the submersible motor rotor, the upper end of the middle shaft extends into the upper transmission sleeve and is fixedly connected with the lower end of the upper screw rod in a coaxial mode, and the lower end of the middle shaft extends into the lower transmission sleeve and is fixedly connected with the upper end of the lower screw rod in a coaxial mode;
the upper electromagnetic clutch comprises an upper electromagnetic clutch driving end and an upper electromagnetic clutch driven end, the upper electromagnetic clutch can be combined with or separated from the upper electromagnetic clutch driven end respectively when the upper electromagnetic clutch is powered on or powered off, the upper electromagnetic clutch is sleeved outside the upper screw rod, the upper electromagnetic clutch driving end is circumferentially and relatively fixedly connected with the upper end of the upper transmission sleeve, the upper electromagnetic clutch driven end is coaxially and fixedly connected with an upper screw rod nut, and the upper screw rod is in threaded connection with the upper screw rod nut;
the lower electromagnetic clutch comprises a lower electromagnetic clutch driving end and a lower electromagnetic clutch driven end, the lower electromagnetic clutch can be combined with or separated from the lower electromagnetic clutch driving end and the lower electromagnetic clutch driven end respectively when the lower electromagnetic clutch is switched on or off, the lower electromagnetic clutch is sleeved outside the lower screw rod, the lower electromagnetic clutch driving end is circumferentially and relatively fixedly connected with the lower end of the lower transmission sleeve, the lower electromagnetic clutch driven end is coaxially and fixedly connected with a lower screw rod nut, and the lower screw rod is in threaded connection with the lower screw rod nut;
the upper screw anti-rotation device can limit the upper screw to rotate, and the lower screw anti-rotation device can limit the lower screw to rotate;
the thread turning directions of the upper lead screw and the lower lead screw are opposite;
the reciprocating oil well pump comprises an oil pump plunger, the lower end of the oil pump plunger is fixedly connected with the upper end of the upper screw rod, and the reciprocating motion of the oil pump plunger can enable the reciprocating oil well pump to finish oil absorption and oil discharge processes.
2. The submersible motor reciprocating oil pumping unit of claim 1, characterized in that: the upper screw rod anti-rotation device comprises an upper joint and an upper joint guide sleeve, the lower end of the upper joint is fixedly connected with the upper end of the upper screw rod, the upper end of the upper joint is fixedly connected with the lower end of the oil pump plunger, the upper joint is axially and slidably arranged in the upper joint guide sleeve, and the upper joint guide sleeve can limit the rotation of the upper joint; lead screw rotational lock includes lower clutch and lower clutch uide bushing down, the lower clutch upper end with lead screw lower extreme fixed connection down, the lower clutch sets up along endwise slip in the lower clutch uide bushing, the lower clutch uide bushing can restrict the lower clutch is rotatory.
3. The submersible motor reciprocating oil pumping unit of claim 2, characterized in that: the submersible motor rotor is sleeved with a submersible motor shell, the upper transmission sleeve is sleeved with an upper transmission sleeve shell, the lower transmission sleeve is sleeved with a lower transmission sleeve shell, and the upper end and the lower end of the submersible motor shell are fixedly connected with the lower end of the upper transmission sleeve shell and the upper end of the lower transmission sleeve shell in a sealing manner; an upper electromagnetic clutch shell is sleeved outside the driving end of the upper electromagnetic clutch and the driven end of the upper electromagnetic clutch, the upper end of the upper transmission sleeve shell is fixedly connected with the lower end of the upper electromagnetic clutch shell in a sealing manner, the upper end of the upper electromagnetic clutch shell is fixedly connected with the lower end of the upper joint guide sleeve in a sealing manner, and the upper end of the upper joint guide sleeve is fixedly connected with a pump cylinder of the reciprocating oil well pump in a sealing manner; electromagnetic clutch drive end down with electromagnetic clutch driven end overcoat is equipped with down the electromagnetic clutch shell, down drive sleeve shell lower extreme with the sealed fixed connection in electromagnetic clutch shell upper end down, electromagnetic clutch shell lower extreme down with the sealed fixed connection in lower clutch uide bushing upper end, the port seals under the lower clutch uide bushing.
4. The submersible motor reciprocating oil pumping unit of claim 3, characterized in that: the reciprocating oil well pump also comprises a lower valve body, an upper valve body, a pump valve, a first oil outlet pipe, a second oil outlet pipe and an oil collecting pipe, wherein the pump cylinder of the reciprocating oil well pump comprises a first small pump cylinder, a large pump cylinder and a second small pump cylinder, the lower end of the first small pump cylinder is fixedly connected with the upper end of the upper joint guide sleeve in a sealing way, the upper end of the first small pump cylinder is fixedly connected with the lower end of the lower valve body in a coaxial sealing way, the upper end of the lower valve body is fixedly connected with the lower end of the large pump cylinder in a coaxial sealing way, the upper end of the large pump cylinder is fixedly connected with the lower end of the upper valve body in a coaxial sealing way, the upper end of the upper valve body is fixedly connected with the lower end of the second small pump cylinder in a coaxial sealing way, the upper end of the second small pump cylinder is fixedly connected with the lower end of the oil collecting pipe, the upper end of the oil collecting pipe is used for being connected with the underground oil pipe, the upper end and the lower end of the first oil outlet pipe are respectively communicated with the oil discharge pipe and the lower valve body, the upper end and the lower end of the second oil outlet pipe are respectively communicated with the oil collecting pipe and the oil discharge port of the upper valve body, the pump valve is arranged in the upper valve body and the lower valve body, the pump valve comprises a suction valve and a discharge valve, the oil suction ports of the upper valve body and the lower valve body are respectively provided with the suction valve, the oil discharge ports of the upper valve body and the lower valve body are respectively provided with the discharge valve, the oil pump plunger comprises small plungers at two ends and a large plunger which is arranged between the two small plungers and coaxially and fixedly connected with the two small plungers, the small plunger at the lower end is hermetically and slidably connected in the first small pump cylinder, the small plunger at the upper end is hermetically and slidably connected in the second small pump cylinder, the lower end of the small plunger at the lower end passes through the first small pump cylinder and is fixedly connected with the upper end of the upper connector, and the large plunger is hermetically and slidably connected in the large pump cylinder, the large plunger piston divides the large pump barrel into an upper working chamber and a lower working chamber, a communicating channel is arranged between the suction valve and the discharge valve of the upper valve body, the upper working chamber is communicated with the upper communicating channel of the upper valve body, and a communicating channel is arranged between the suction valve and the discharge valve of the lower valve body, the lower working chamber is communicated with the lower communicating channel of the lower valve body.
5. The submersible motor reciprocating oil pumping unit of claim 3, characterized in that: the driven end of the upper electromagnetic clutch is rotationally connected with the outer shell of the upper electromagnetic clutch through an upper electromagnetic clutch bearing; and the driven end of the lower electromagnetic clutch is rotationally connected with the lower electromagnetic clutch shell through a lower electromagnetic clutch bearing.
6. The submersible motor reciprocating oil pumping unit of claim 2, characterized in that: an upper sealing groove is formed in the peripheral surface of the upper joint, an upper sealing ring is arranged in the upper sealing groove, and the upper joint is connected with the upper joint guide sleeve in a sealing mode through the upper sealing ring; the outer peripheral surface of the lower joint is provided with a lower sealing groove, a lower sealing ring is arranged in the lower sealing groove, and the lower joint is hermetically connected with the lower joint guide sleeve through the lower sealing ring.
7. The submersible motor reciprocating oil pumping unit of claim 4, characterized in that: the suction valve and the discharge valve are both one-way valves, when the oil pump plunger moves upwards, oil in an oil well flows into the lower working cavity in a one-way mode through the suction valve in the lower valve body, and the oil in the upper working cavity is discharged into the second oil outlet pipe in a one-way mode through the discharge valve in the upper valve body; when the oil pump plunger moves downwards, oil in the lower working cavity is discharged to the first oil outlet pipe in a one-way mode through the discharge valve in the lower valve body, and oil in an oil well flows to the upper working cavity in a one-way mode through the suction valve in the upper valve body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010846949.9A CN111980632B (en) | 2020-08-21 | 2020-08-21 | Reciprocating oil pumping device of submersible motor |
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| CN202010846949.9A CN111980632B (en) | 2020-08-21 | 2020-08-21 | Reciprocating oil pumping device of submersible motor |
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| CN111980632B true CN111980632B (en) | 2022-06-03 |
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|---|---|---|---|---|
| US4997346A (en) * | 1990-04-12 | 1991-03-05 | Atlantic Richfield Company | Well pumping systems |
| CN2291600Y (en) * | 1997-03-06 | 1998-09-16 | 张功明 | Automatic reversing cooking fume remover |
| CN201027648Y (en) * | 2007-02-12 | 2008-02-27 | 扬州大学 | Straight-rotary screw pump |
| CN201057033Y (en) * | 2006-11-22 | 2008-05-07 | 中国石油天然气集团公司 | Integrated control device of continuous pipe working machine |
| CN102226466A (en) * | 2011-06-13 | 2011-10-26 | 张庆鹏 | Reciprocating screw transmission mechanism |
| CN106194116A (en) * | 2016-08-30 | 2016-12-07 | 陕西昊科工贸有限公司 | Well site automatic injection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9915133B2 (en) * | 2015-02-20 | 2018-03-13 | Flowco Production Solutions, LLC | Unibody bypass plunger with centralized helix and crimple feature |
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2020
- 2020-08-21 CN CN202010846949.9A patent/CN111980632B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4997346A (en) * | 1990-04-12 | 1991-03-05 | Atlantic Richfield Company | Well pumping systems |
| CN2291600Y (en) * | 1997-03-06 | 1998-09-16 | 张功明 | Automatic reversing cooking fume remover |
| CN201057033Y (en) * | 2006-11-22 | 2008-05-07 | 中国石油天然气集团公司 | Integrated control device of continuous pipe working machine |
| CN201027648Y (en) * | 2007-02-12 | 2008-02-27 | 扬州大学 | Straight-rotary screw pump |
| CN102226466A (en) * | 2011-06-13 | 2011-10-26 | 张庆鹏 | Reciprocating screw transmission mechanism |
| CN106194116A (en) * | 2016-08-30 | 2016-12-07 | 陕西昊科工贸有限公司 | Well site automatic injection device |
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| CN111980632A (en) | 2020-11-24 |
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