WO2020093894A1 - Nouveau dispositif d'injection d'eau sous pression pour pompe à vis - Google Patents

Nouveau dispositif d'injection d'eau sous pression pour pompe à vis Download PDF

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Publication number
WO2020093894A1
WO2020093894A1 PCT/CN2019/113616 CN2019113616W WO2020093894A1 WO 2020093894 A1 WO2020093894 A1 WO 2020093894A1 CN 2019113616 W CN2019113616 W CN 2019113616W WO 2020093894 A1 WO2020093894 A1 WO 2020093894A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
screw pump
hole
water injection
injection device
Prior art date
Application number
PCT/CN2019/113616
Other languages
English (en)
Chinese (zh)
Inventor
李德印
Original Assignee
新乡市夏烽电器有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新乡市夏烽电器有限公司 filed Critical 新乡市夏烽电器有限公司
Publication of WO2020093894A1 publication Critical patent/WO2020093894A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20—Displacing by water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units

Definitions

  • the invention relates to an oil field water injection device, in particular to a screw pump water injection device.
  • Oilfield water injection needs to be injected after the water injection station is pressurized.
  • the main line pressure is generally 10-20MPa. Blocks requiring pressurized water injection use block pressurized water injection.
  • the branch pressure is generally less than 25MPa, but the actual well conditions are different and some wells often occur If the pressure is not enough, the phenomenon of water injection can not be entered.
  • the two media of the motor oil and water in the motor will mix with each other under the pressure imbalance, which affects the use of the motor. How to solve the above problems , The existing technology does not give solutions and technologies, and urgently needs to be resolved.
  • the purpose of the present invention is to provide a new type of screw pump water injection device to overcome the deficiencies of the prior art.
  • the utility model provides a relay type booster pump.
  • the inlet water does not need to reduce the pressure, but can be high-pressure incoming water. On this basis, it continues to be boosted again by the screw pump, and higher pressure water is injected into the ground without damaging the motor.
  • a new type of screw pump water injection device includes a motor 4 and a screw pump 16, the motor 4 is electrically connected to the controller, the motor 4 is connected to the screw pump 16 through a flexible connection device, and the motor shaft 7 of the motor 4 Two positive and negative thrust bearings 5, 6 or one bidirectional thrust bearing are provided, and a mechanical seal 12 is installed on the motor shaft 7, which is characterized in that a pressure balancing device is provided in the sealed chamber 8.
  • the pressure balancing device may be a spiral elongated tube 17, one end of which is fixedly connected to the sealed inner tube 11, a through hole is opened in the sealed inner tube 11, the motor oil in the motor 4 enters the spiral elongated tube 17 through the through hole , The other end is fixedly connected to the sealing base 10, and the sealing base 10 also has a through hole, water enters the spiral elongated tube 17 through the through hole on the sealing base 10, and the two ends of the spiral elongated tube 17 are respectively connected to the motor oil and water Connected. In this way, a pressure balance of water and oil is formed in the spiral elongated tube 17. It should be noted that the pressure balancing device of the spiral elongated tube 17 structure can be used in the vertical screw pump pressurized water injection device, but cannot be used in the horizontal screw pump pressurized water injection device.
  • the pressure balancing device may be a serpentine channel, and more than two settling tubes are installed in the sealed chamber 8. Taking two as an example, the settling tube 18 is fixedly connected to the sealing chamber 8, the settling tube 19 is fixedly connected to the sealing base 10, so that a closed motor oil serpentine channel is formed between the sedimentation tubes. One end of the serpentine channel is connected to the seal The tube 11 is fixedly connected, and a through hole is opened in the sealed inner tube 11. The motor oil in the motor 4 enters the serpentine channel through the through hole, and the other end is fixedly connected to the sealing base 10, and the sealing base 10 also has a through hole, water The serpentine channel is entered through the through hole on the sealing base 10, and the two ends of the serpentine channel communicate with the motor oil and water, respectively. Motor oil and water form a pressure balance in the serpentine channel. It should be noted that this serpentine channel pressure balancing device can be used in the vertical screw pump pressurized water injection device, but cannot be used in the horizontal screw pump pressurized water injection device.
  • the pressure balance device is a capsule 20.
  • the capsule 20 is mounted on the sealed inner tube 11.
  • the upper and lower ends of the capsule 20 are tightly connected to the outer wall of the sealed inner tube 11.
  • the sealed inner tube 11 is provided with a through hole.
  • the motor oil can enter the capsule 20 through the above-mentioned through holes, and a through hole is also opened on the sealing base 10, and the water enters the outside of the capsule 20 through the through hole on the sealing base 10, and the capsule 20 isolates the motor oil and water.
  • this capsule 20 type pressure balancing device can be used in a vertical screw pump pressurized water injection device or a horizontal screw pump pressurized water injection device.
  • the motor is a permanent magnet synchronous motor.
  • the structure of the permanent magnet synchronous motor is simple and durable, which can achieve low speed and high torque output.
  • the motor rotor has no induced current excitation, and its power factor reaches more than 0.9, thereby improving the quality factor of the grid.
  • the compensation equipment in the corresponding power grid is reduced and eliminated, which reduces the investment cost, simplifies the power grid structure, and facilitates management.
  • the controller in the control cabinet 1 realizes three closed-loop control of the current feedback, speed feedback and position feedback of the permanent magnet synchronous motor 3.
  • the controller of the control cabinet 1 can be equipped with a GPRS remote control module.
  • the present invention overcomes the deficiencies of the prior art and provides a booster water injection device for a new type of screw pump.
  • the screw pump keeps the motor oil and water inlet during the pressure injection process Incoming water pressure balance, so that the mechanical seal 5 can work normally, and the medium will not be fully mixed, so that the motor is always insulated motor oil, high-pressure rotary seal can be achieved, so that the equipment can work normally,
  • the high-pressure water that can pass through the water inlet does not need to reduce the pressure, but can be high-pressure incoming water. On this basis, it continues to be pressurized again by the screw pump, and higher pressure water is injected into the ground without damaging the motor.
  • Figure 1 is a schematic diagram of the utility model.
  • FIG. 2 is a schematic cross-sectional view of a structure in which the pressure balancing device is a spiral elongated tube.
  • FIG 3 is a schematic cross-sectional view of a structure in which the pressure balancing device is a serpentine channel.
  • FIG. 4 is a schematic cross-sectional view of a structure in which the pressure balancing device is a capsule.
  • a pressurized water injection device of a new screw pump includes a motor 4 and a screw pump 16, the motor 4 is connected to the control cabinet 1 through a junction box 2 and a cable 3
  • the device controller is electrically connected, and the motor 4 is connected to the screw pump 16 through a flexible connection device.
  • the motor shaft 7 of the motor 4 is provided with two forward and reverse thrust bearings 5, 6, or a bidirectional thrust bearing, and a mechanical seal 12 It is mounted on the motor shaft 7 and is characterized in that a pressure balancing device is provided in the sealed chamber 8.
  • the flexible connecting device may be a coupling plus a flexible rod, or may be one of a universal joint, a coupling, etc.
  • the motor shaft 7 of the motor cannot be rigidly connected to the screw pump 16, However, the problem of the flexible connection between the two can be solved in the above-mentioned various ways.
  • the embodiment and schematic diagram of the present invention use the coupling 13 and the flexible rod 15 to form a flexible connection device.
  • the motor 4 is provided with two forward and reverse thrust bearings.
  • the water inlet 14 enters the water, and there is pressure from the incoming water pressure, the motor shaft 7 will be subjected to downward axial force, and the thrust bearing 2 6
  • the outlet pressure of the screw pump 16 is greater than the inlet pressure, the rotor will generate an upward axial force, and will be transmitted to the flexible rod 15 and the motor shaft 7, thrust bearing 15 when the equipment works Transmit the axial force.
  • a thrust bearing on the upper and lower sides of the motor shaft in the opposite direction.
  • the purpose is to prevent the motor shaft from moving along the axial direction, and to solve the problem that the motor shaft is sometimes pulled downward and sometimes pushed upward, resulting in excessive displacement.
  • the mechanical seal 12 is invalidated. Therefore, the two forward and reverse thrust bearings can also be replaced by a bidirectional thrust bearing, which has the same function as the two thrust bearings.
  • the pressure balance device may be a spiral elongated tube 17, one end of which is fixedly connected to the sealed inner tube 11, a through hole is opened in the sealed inner tube 11, and the motor oil in the motor 4 passes through the through hole Entering the spiral elongated tube 17, the other end is fixedly connected to the sealing base 10, and a through hole is also opened in the sealing base 10, and water enters the spiral elongated tube 17 through the through hole on the sealing base 10, both ends of the spiral elongated tube 17 Communicate with motor oil and water respectively. In this way, a pressure balance of water and oil is formed in the spiral elongated tube 17.
  • the specific gravity of the motor oil is about 0.8, which is lighter than water, the two will form a layering phenomenon, and the oil-water contact surface is in the sealed pipeline 11, when the motor oil expands and contracts, the contact surface floats up and down in the pipeline, the pipeline
  • the volume must meet the expansion and contraction of the motor oil to prevent water from entering the motor.
  • the pressure of the motor oil and the water inlet 14 is balanced, so that the mechanical seal 5 can work normally, and the medium will not be fully mixed , So that the motor oil is always insulated in the motor, so that the equipment can work normally, the high-pressure rotating mechanical seal 12 can be realized, and the engine 4 is protected during operation.
  • the pressure balance structure of this spiral elongated tube 17 can be used in a vertical screw pump pressurized water injection device, but cannot be used in a horizontal screw pump pressurized water injection device.
  • the pressure balance device may be a serpentine channel. More than two settling pipes are installed in the sealed chamber 8. Taking two additional installations as an example, the settling pipe 18 is fixedly connected to the sealed chamber 8. The settling tube two 19 is fixedly connected to the sealing base 10, so that a closed serpentine channel of motor oil is formed between the settling tubes, and one end of the serpentine channel is fixedly connected to the sealed inner tube 11, a through hole is opened on the sealed inner tube 11, and the motor 4 The motor oil inside enters the serpentine channel through the above-mentioned through hole, and the other end is fixedly connected to the sealing base 10.
  • the sealing base 10 also has a through hole. Water enters the serpentine channel through the through hole on the sealing base 10.
  • Both ends are connected with motor oil and water.
  • Motor oil and water form a pressure balance in the serpentine channel.
  • the diameter of the settling tube may be the same or different. Because the specific gravity of the motor oil is about 0.8, it is lighter than water and will form a stratification phenomenon, and the oil-water contact surface is in the settling cavity. When the motor oil expands and contracts, the oil-water contact surface floats up and down in the settling cavity The volume must meet the expansion and contraction of the motor oil to prevent water from entering the motor. In this way, the motor oil and the water inlet 14 are balanced in water pressure, so that the mechanical seal 12 can work normally and protect the engine 4. It should be noted that the pressure balance structure of this serpentine channel structure can be used in the vertical screw pump pressurized water injection device, but cannot be used in the horizontal screw pump pressurized water injection device.
  • the pressure balance structure is a capsule 20.
  • the capsule 20 is mounted on the sealed inner tube 11.
  • the upper and lower ends of the capsule 20 are tightly connected to the outer wall of the sealed inner tube 11.
  • the sealed inner tube 11 is provided with a through hole.
  • the motor oil can enter the capsule 20 through the above-mentioned through holes, and a through hole is also opened on the sealing base 10, and the water enters the outside of the capsule 20 through the through hole on the sealing base 10, and the capsule 20 isolates the motor oil and water. Because the capsule isolates the motor oil and water, this prevents water from entering the motor.
  • the capsule is made of a flexible material that can be expanded and contracted to meet the thermal expansion and contraction of the motor oil. It can also balance the liquid pressure on both sides.
  • this capsule 20 type pressure balance structure can be used in a vertical screw pump pressurized water injection device or a horizontal screw pump pressurized water injection device.
  • the motor is a permanent magnet synchronous motor.
  • the structure of the permanent magnet synchronous motor is simple and durable, which can achieve low speed and high torque output.
  • the motor rotor has no induced current excitation, and its power factor reaches more than 0.9, thereby improving the quality factor of the power grid.
  • the compensation equipment in the corresponding power grid is reduced and eliminated, which reduces the investment cost, simplifies the power grid structure, and facilitates management.
  • the controller in the control cabinet 1 realizes three closed-loop control of the current feedback, speed feedback and position feedback of the permanent magnet synchronous motor 3, accurately controls the speed and torque of the motor, drives the motor flexibly and smoothly, and greatly reduces system losses, To achieve the maximum efficiency of the overall system operation.
  • the controller of the control cabinet 1 can be equipped with a GPRS remote control module, which can transmit the equipment operation data and the water inlet and outlet pressure data to the server and the background to realize real-time monitoring and control on the visual platform without on-site operation.
  • a GPRS remote control module which can transmit the equipment operation data and the water inlet and outlet pressure data to the server and the background to realize real-time monitoring and control on the visual platform without on-site operation.
  • the whole process of water injection is carried out in an orderly manner.
  • the above is a pressurized water injection device of a new type screw pump of the present invention.
  • the present invention can be installed vertically or horizontally. Most of them are vertical installations. In actual work, there are also horizontal installations due to work needs.
  • the technical solution for the installation is: a new type of screw pump water injection device, including a motor 4 and a screw pump 16, the motor 4 is electrically connected to the controller, the motor 4 is connected to the screw pump 16 through the flexible connection device 15 Connection, the motor 4 is provided with two forward and reverse thrust bearings 5, 6 or a two-way thrust bearing, and a mechanical seal 12 is installed on the motor shaft 7, characterized in that a capsule 20 is provided in the sealed compartment 8 The capsule 20 is installed on the sealed inner tube 11.
  • the upper and lower ends of the capsule 20 are tightly connected to the outer wall of the sealed inner tube 11.
  • the sealed inner tube 11 has a through hole through which the motor oil in the motor 4 can enter the capsule 20. Inside, a through hole is also opened in the sealing base 10, and water enters the outside of the capsule 20 through the through hole in the sealing base 10, and the capsule 20 isolates motor oil and water.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Selon l'invention, un dispositif d'injection d'eau sous pression pour pompe à vis comprend un moteur électrique (4) et une pompe à vis (16). Le moteur électrique (4) est raccordé électriquement à un dispositif de commande et à la pompe à vis (16) au moyen d'un dispositif de raccordement souple. Un arbre de moteur (7) est muni de paliers de butée positif et négatif (5, 6) ou d'un palier de butée à double effet. Une garniture mécanique (12) est disposée sur l'arbre de moteur (7). Un compartiment d'étanchéité (8) est muni d'un dispositif d'équilibrage de pression. Le dispositif porte une pompe de surpression relais. L'eau peut être alimentée sans baisse de pression, et l'eau d'alimentation à haute pression est prise en charge. Sur cette base, la mise en pression s'effectue de nouveau au moyen de la pompe à vis de sorte que l'eau de pression plus élevée soit obtenue et injectée dans le sol sans endommager le moteur électrique.
PCT/CN2019/113616 2018-11-10 2019-10-28 Nouveau dispositif d'injection d'eau sous pression pour pompe à vis WO2020093894A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811334603.XA CN109139455A (zh) 2018-11-10 2018-11-10 一种新型螺杆泵的增压注水装置
CN201811334603.X 2018-11-10

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Publication Number Publication Date
WO2020093894A1 true WO2020093894A1 (fr) 2020-05-14

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PCT/CN2019/113616 WO2020093894A1 (fr) 2018-11-10 2019-10-28 Nouveau dispositif d'injection d'eau sous pression pour pompe à vis

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WO (1) WO2020093894A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109139455A (zh) * 2018-11-10 2019-01-04 新乡市夏烽电器有限公司 一种新型螺杆泵的增压注水装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040035585A1 (en) * 2002-08-22 2004-02-26 Ireland Floyd D. Well pump capsule
CN201461429U (zh) * 2009-05-22 2010-05-12 新乡市夏烽电器有限公司 一种新型潜油直驱螺杆泵
CN202628585U (zh) * 2012-05-21 2012-12-26 胜利油田胜利泵业有限责任公司 串联型胶囊保护器
CN204386570U (zh) * 2014-12-14 2015-06-10 张成功 单螺杆增压注水泵
CN109139455A (zh) * 2018-11-10 2019-01-04 新乡市夏烽电器有限公司 一种新型螺杆泵的增压注水装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040035585A1 (en) * 2002-08-22 2004-02-26 Ireland Floyd D. Well pump capsule
CN201461429U (zh) * 2009-05-22 2010-05-12 新乡市夏烽电器有限公司 一种新型潜油直驱螺杆泵
CN202628585U (zh) * 2012-05-21 2012-12-26 胜利油田胜利泵业有限责任公司 串联型胶囊保护器
CN204386570U (zh) * 2014-12-14 2015-06-10 张成功 单螺杆增压注水泵
CN109139455A (zh) * 2018-11-10 2019-01-04 新乡市夏烽电器有限公司 一种新型螺杆泵的增压注水装置

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