CN112539048A - Offset screw pressurizing water injection device - Google Patents

Offset screw pressurizing water injection device Download PDF

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Publication number
CN112539048A
CN112539048A CN202011519964.9A CN202011519964A CN112539048A CN 112539048 A CN112539048 A CN 112539048A CN 202011519964 A CN202011519964 A CN 202011519964A CN 112539048 A CN112539048 A CN 112539048A
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CN
China
Prior art keywords
water injection
well
logging
injection well
screw pump
Prior art date
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Pending
Application number
CN202011519964.9A
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Chinese (zh)
Inventor
宋宇飞
魏军
青顼栋
勾国伟
汪洋
岳修业
熊健伟
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Xinxiang City Xiafeng Electrical Appliances Co ltd
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Xinxiang City Xiafeng Electrical Appliances Co ltd
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Publication date
Application filed by Xinxiang City Xiafeng Electrical Appliances Co ltd filed Critical Xinxiang City Xiafeng Electrical Appliances Co ltd
Priority to CN202011519964.9A priority Critical patent/CN112539048A/en
Publication of CN112539048A publication Critical patent/CN112539048A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • 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
    • 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
    • F04C2210/00—Fluid
    • F04C2210/10—Fluid working
    • F04C2210/1094—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

The invention provides an offset screw pressurizing water injection device, which comprises: the shell is hermetically connected with the water injection well; the screw pump is arranged on the shell, extends into the water injection well and is used for injecting water into the water injection well; the well logging pipeline is arranged on the shell, is parallel to the screw pump and extends into the water injection well, and is used for performing in-well operation on the water injection well; the water injection into the water injection well through the screw pump is not performed simultaneously with the operation in the well of the water injection well through the logging channel. This device can direct mount on the water injection well, need not tear screw pump open or extract the screw rod pressure boost water injection device from the well head, can directly carry out operations such as well-flushing, well logging, profile control through the logging passageway, greatly reduced operating cost and operation degree of difficulty. Meanwhile, after the offset screw pressurizing water injection device is installed, the offset screw pressurizing water injection device does not need to be disassembled during various operations such as well washing, well logging, profile control and the like every year, so that the risk of damaging the unit due to the disassembly and assembly of the unit can be greatly reduced, and the stability of the device is ensured.

Description

Offset screw pressurizing water injection device
Technical Field
The invention belongs to the technical field of oilfield water injection, and particularly relates to an offset screw pressurizing water injection device.
Background
At present, a screw pump is a common pressurizing water injection device at the tail end of an oil field, wherein the screw pump is divided into a vertical structure and a horizontal structure, and in addition, pressurizing water injection devices such as a centrifugal pump and a reciprocating pump are arranged. The horizontal screw pressurizing water injection device, the centrifugal pump and the reciprocating pump have larger discharge capacity, and generally one water injection device is used for simultaneously injecting water into a plurality of water injection wells; if only one water injection well is arranged in one well site, a vertical screw pump is generally adopted to perform pressurized water injection on the water injection well, and when the water injection well is used, the vertical screw pump is directly installed at the well head of the water injection well so as to perform pressurized water injection on the water injection well.
The vertical screw rod pressurizing water injection displacement is small, the structure is simple, the vertical screw rod pressurizing water injection displacement pump can be directly installed on a well head of a water injection well, and the occupied land area is not needed, so that the vertical screw rod pressurizing water injection displacement pump is widely used in water injection of the water injection well of an oil field in specific production. The conventional vertical screw pressurizing water injection device is characterized in that a water injection motor is directly installed on a well head of a water injection well, and a screw pump is inversely inserted into the water injection well to perform pressurizing water injection.
The common vertical screw pump has the advantages of small occupied area, simple structure, small discharge capacity and suitability for single well injection, and the main problems of the water injection mode are as follows: the vertical screw pump occupies an operation channel of the water injection well, the water injection well cannot be subjected to operations such as well washing, well logging, profile control and the like, and the vertical screw pump needs to be detached from the water injection well every time the operations such as well washing, well logging, profile control and the like are carried out, and the operations such as well washing, well logging, profile control and the like can be carried out only after the screw pump is pulled out.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to overcome the technical problems in the prior art and provides an offset screw pressurizing water injection device to realize the borehole operation without disassembling a screw pump.
In order to achieve the above purpose, the invention provides the following technical scheme:
an offset screw boosting water injection apparatus for injecting water or performing operations in a well to a water injection well, the water injection apparatus comprising:
the shell is hermetically connected with the water injection well;
the screw pump is arranged on the shell, extends into the water injection well and is used for injecting water into the water injection well;
the well logging pipeline is arranged on the shell, is parallel to the screw pump and extends into the water injection well, and is used for performing in-well operation on the water injection well; wherein the downhole operation comprises at least: logging, well washing and profile control;
and injecting water into the water injection well through the screw pump and performing in-well operation on the water injection well through the logging channel at the same time.
Preferably, one end of the screw pump is connected to the water outlet of the housing, and the other end of the screw pump extends into the water injection well.
The offset screw pressurizing water injection device preferably comprises a lining, a rotor and a stator; one end of the lining is connected to the water outlet, and the other end of the lining extends into the water injection well;
the stator is arranged in the lining, one end of the rotor is connected with the transmission shaft, the other end of the rotor is arranged in the stator, and the rotor is driven by the transmission shaft to rotate in the stator so as to inject water into the water injection well.
In the above offset screw rod pressurizing water injection device, preferably, a fixing member corresponding to the transmission shaft is arranged in the housing, the fixing member is fixedly connected to the water outlet of the housing and is provided with an installation part,
one end of the transmission shaft is installed in the installation part, and the end part of the transmission shaft extends out of the fixing part and is connected with the driving mechanism so as to transmit the power of the driving mechanism to the rotor and drive the rotor to rotate.
As above-mentioned offset screw rod pressure boost water injection device, preferably, the installation department for set up in the inside wall of mounting, along its radial inside annular protrusion that extends, it is corresponding, be equipped with on the transmission shaft with the shaft shoulder, the shaft shoulder with annular protrusion cooperatees, in order to right the transmission shaft carries out axial spacing.
Preferably, the driving mechanism is a driving motor, the driving motor is disposed on an outer wall of the housing, a main shaft of the driving motor extends into the housing and is connected to one end of the transmission shaft through a transmission assembly, wherein the transmission assembly is used for transmitting output power of the main shaft to the transmission shaft.
According to the offset screw pressurizing water injection device, preferably, the shell is provided with a first flange corresponding to the screw pump and the logging pipeline; correspondingly, a casing is arranged at the wellhead of the water injection well, and a second flange matched with the first flange is arranged on the casing;
the screw pump and the logging pipeline sequentially penetrate through the first flange and the second flange and extend into the casing.
In the offset screw pressurizing water injection device, preferably, the logging pipeline penetrates through the shell along the length direction of the screw pump and extends into the water injection well;
wherein at least one of the progressive cavity pump and the logging pipe is eccentrically arranged with respect to the water injection well.
The offset screw pressurizing water injection device is preferably connected between the casing and the logging pipeline in a sealing mode.
The offset screw pressurizing water injection device is preferably characterized in that a valve is arranged on the logging pipeline.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
the application provides a new structural form, so that the problem of difficult operations such as well washing, well logging, profile control and the like in single-well pressurized water injection is solved, the application adopts a screw pump for water injection, can be directly installed on a water injection well, and has the advantages of small occupied area, simple structure and small discharge capacity; meanwhile, a logging pipeline is arranged, so that the problem that operations such as well flushing, well logging, profile control and the like cannot be performed in the conventional technology is solved.
The well logging pipeline and the screw pump extend into the water injection well side by side, therefore, the screw pump does not need to be detached or pulled out from the well mouth of the screw pressurizing water injection device, and the well washing, well logging, profile control and other operations can be directly carried out through the well logging channel, so that the operation cost and the operation difficulty are greatly reduced. Meanwhile, after the offset screw pressurizing water injection device is installed, the offset screw pressurizing water injection device does not need to be disassembled during various operations such as well washing, well logging, profile control and the like every year, so that the risk of damaging the unit due to the disassembly and assembly of the unit can be greatly reduced, and the stability of the device is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic structural view of the offset screw pressurizing water injection device according to the embodiment of the present invention;
FIG. 2 is an enlarged schematic view taken at A of FIG. 1 in accordance with an embodiment of the present invention;
fig. 3 is a schematic view of the installation of a propeller shaft according to an embodiment of the present invention.
Illustration of the drawings:
1. a control cabinet; 2. a drive motor; 3. logging a pipeline; 4. a valve; 5. a housing; 6. a transmission assembly; 7. a fixing member; 8. a first flange; 9. a second flange; 10. a sleeve; 11. a bushing; 12. a drive shaft; 13. a rotor; 14. a stator; 15. a cylindrical roller bearing; 16. a thrust bearing; 5.1, end cover; 6.1, a first gear, 6.2 and a second gear; 7.1, perforation.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention provides an offset screw pressurizing water injection device, which adopts a screw pump to inject water and can be directly arranged on a water injection well, so that the device has the advantages of small floor area, simple structure and small discharge capacity; meanwhile, the screw pump does not need to be detached or pulled out from the wellhead of the screw pressurizing water injection device, and operations such as well washing, well logging, profile control and the like can be directly carried out through the well logging channel, so that the operation cost and the operation difficulty are greatly reduced. Meanwhile, after the offset screw pressurizing water injection device is installed, the offset screw pressurizing water injection device does not need to be disassembled during various operations such as well washing, well logging, profile control and the like every year, so that the risk of damaging the unit due to the disassembly and assembly of the unit can be greatly reduced, and the stability of the device is ensured.
As shown in fig. 1-3, an offset screw pressurizing water injection device comprises: the screw pump is arranged on the shell 5 and used for injecting water into the water injection well; the shell 5 is hermetically connected with the water injection well; the screw pump is arranged on the shell 5 and extends into the water injection well for injecting water into the water injection well; the well logging pipeline 3 is arranged on the shell 5, is parallel to the screw pump and extends into the water injection well, and is used for performing in-well operation on the water injection well; wherein, the operation in the well at least comprises: logging, well washing and profile control; the water injection into the water injection well through the screw pump is not performed simultaneously with the operation in the well of the water injection well through the logging channel.
The screw pump and the logging pipeline 3 are arranged in the water injection well at the same time, the screw pump does not need to be detached from the wellhead or pulled out of the screw pump, and operations such as well washing, well logging, profile control and the like can be directly carried out through the logging channel, so that the operation cost and the operation difficulty are greatly reduced. Meanwhile, after the offset screw pressurizing water injection device is installed, the offset screw pressurizing water injection device does not need to be disassembled during various operations such as well washing, well logging, profile control and the like every year, so that the risk of damaging a unit due to the disassembly and assembly of the unit can be greatly reduced, and the stability of the device is ensured; set up casing 5 and form the water injection chamber, the collocation screw pump carries out the water injection well water injection to water injection chamber and screw pump form independent water injection passageway, and screw pump and logging pipeline 3 do not work simultaneously, make borehole operation and water injection not influence each other, thereby carry out borehole operation under the prerequisite of not dismantling water injection device. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
This application is still specific following embodiment, and casing 5 has water inlet and delivery port, and the delivery port is connected to screw pump one end, and the other end stretches into and carries out the water injection in the water injection well. The water inlet is used for connecting a water supply pipeline and a water injection station, the water outlet is connected with the screw pump, and water is injected into the water injection well in a pressurizing mode through the screw pump. The screw pump and the logging pipeline 3 are arranged in the water injection well at the same time, so that the screw pump is prevented from being disassembled during operation in the well. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
The present application also has an embodiment in which the screw pump comprises a liner 11, a rotor 13 and a stator 14; one end of the lining 11 is connected to the water outlet, and the other end of the lining extends into the water injection well; the stator 14 is arranged in the bushing 11, one end of the rotor 13 is connected with the transmission shaft 12, the other end of the rotor 13 is arranged in the stator 14, and the rotor 13 is driven by the transmission shaft 12 to rotate in the stator 14 so as to inject water into the water injection well.
In particular, the screw pump comprises a liner 11, a rotor 13 and a stator 14, the stator 14 is fixed at a water outlet along the liner 11, the screw pump sucks and discharges liquid by means of the volume change of a sealed cavity formed by the rotor 13 and the stator 14, when the rotor 13 rotates in the stator 14, the rotor 13 rotates around the axis of the rotor, and the rotor rolls along the inner surface of the stator 14, so that the sealed cavity of the pump is formed. The liquid in the seal cavities advances one pitch per revolution of the screw, and as the rotor 13 continues to rotate, the liquid is pressed from one seal cavity to the other in a spiral manner, and finally the pump body is squeezed out. Has the advantages of simple structure, safe and reliable work, convenient use and maintenance, continuous and uniform liquid outlet, stable pressure and the like. Wherein the bushing 11 is fixedly connected with the stator 14 to prevent the stator 14 from rotating with the rotor 13. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
This application still has following embodiment, and casing 5 is inside to be equipped with the mounting 7 that corresponds transmission shaft 12, and mounting 7 links firmly in the delivery port department of casing 5 to be equipped with the installation department, the one end of transmission shaft 12 is installed in the installation department, and the tip of transmission shaft 12 stretches out mounting 7 and is connected with actuating mechanism, in order to transmit actuating mechanism's power to rotor 13, drives rotor 13 and rotates. The fixing piece 7 is arranged, and the fixing piece 7 is connected with the transmission shaft 12 through the mounting part, so that the transmission shaft 12 is limited in the radial direction. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
This application still has following embodiment, and the installation department is protruding for setting up in the inside wall of mounting 7, along its radial inwardly extending's annular, and is corresponding, be equipped with on the transmission shaft 12 with the shaft shoulder, the shaft shoulder with the annular is protruding to cooperate to it is spacing to carry out the axial to transmission shaft 12.
Wherein, the fixing part 7 is internally provided with an annular bulge as a mounting part, so that a first mounting station for correspondingly mounting the thrust bearing 16 is formed at one end of the fixing part, and a second mounting station for mounting the cylindrical roller bearing 15 is formed at the other end of the fixing part; the thrust bearing 16 is correspondingly arranged between the shaft shoulder and the annular bulge, and the cylindrical roller bearing 15 is arranged between the transmission shaft 12 and the inner wall of the fixed part 7 so as to bear axial force and reverse thrust forced by water pressure through the cylindrical roller bearing 15 and the thrust bearing 16 respectively. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, the transmission shaft 12 is provided with a first bushing corresponding to the first mounting station and a second bushing corresponding to the second mounting station, wherein the transmission shaft 12 passes through a corresponding shoulder provided with a corresponding thrust bearing 16 on the first bushing.
The inner wall of the fixing part 7 corresponding to the second installation station and the second shaft sleeve are provided with corresponding limiting grooves, and corresponding clamping rings of the cylindrical roller bearings 15 are correspondingly assembled in the limiting grooves so as to limit the cylindrical roller bearings 15. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, the fixing element 7 is a sleeve body, one end of which is connected to the corresponding water outlet on the inner wall of the shell 5 through a third flange, and an annular protrusion is arranged inside the sleeve body to perform the fixing assembly of the transmission shaft 12. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, the lower edge of the side wall of the fixing member 7 is provided with a plurality of through holes 7.1 or notches, and the through holes 7.1 or notches can be used as communication channels between the water inlet and the water outlet so that water can smoothly enter the screw pump in the water injection process. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
The application also has the following embodiment that the driving mechanism is the driving motor 2, the driving motor 2 is arranged on the outer wall of the shell 5, the main shaft of the driving motor 2 extends into the shell 5 and is connected with one end of the transmission shaft 12 through the transmission assembly 6, and the transmission assembly 6 is used for transmitting the output power of the main shaft to the transmission shaft 12.
Wherein the driving mechanism is a driving motor 2, such as at least one of a gear transmission, a chain transmission, and a universal joint coupling. The driving motor 2 is used for driving the transmission shaft 12, so that the rotor 13 can be driven to rotate in the stator 14, and pressurized water injection is realized.
Taking the form of gear transmission as an example, the gear set at least comprises a first gear 6.1 and a second gear 6.2, wherein the first gear 6.1 is assembled on the main shaft of the driving motor 2; one end of the transmission shaft 12 extends out of the fixing part 7, the extending part of the transmission shaft 12 is provided with the second gear 6.2, and the first gear 6.1 and the second gear 6.2 are meshed with each other so as to realize transmission of the transmission shaft 12 in the driving process by the driving motor 2. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, the transmission shaft 12 is flexibly connected with the rotor 13, for example, through a universal joint connection, when the screw pump operates, the spindle of the driving motor 2 rotates the rotor 13 in the stator 14, which generates stress in multiple directions, and therefore, the universal joint connection is used for eliminating stress in any direction. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, the side wall of the casing 5 opposite to the water injection well is an end cover 5.1, the end cover 5.1 is detachably connected to the casing 5 through a screw, wherein the driving mechanism is fixedly connected to the end cover 5.1 and generates transmission along with the assembly of the end cover 5.1 on the transmission shaft 12, and a sealing ring is arranged between the end cover 5.1 and the casing 5 to ensure that no water leakage occurs during the water injection process. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, the motor is arranged above the flange end cover 5.1 and is connected by screws, and a seal is arranged between the flange of the motor end and the flange end cover 5.1, so that no leakage is caused during high-pressure water injection; the flange end cover 5.1 is arranged on the end cover 5.1, the end cover 5.1 is connected with the end cover by a screw and sealed, and no leakage is ensured during high-pressure water injection; wherein sealing can be performed by means of a sealing ring.
The application also has the following implementation mode that the shell 5 is provided with a first flange 8 corresponding to the screw pump and the logging pipeline 3; correspondingly, a casing 10 is arranged at the wellhead of the water injection well, and a second flange 9 matched with the first flange 8 is arranged on the casing 10;
the screw pump and the logging pipeline 3 sequentially penetrate through the first flange 8 and the second flange 9 and extend into the casing 10. Wherein, be equipped with the sealing washer between first flange 8 and the second flange 9 to can not take place to leak in the realization high pressure water injection process. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, the casing 10 is threadably connected to the wellhead of the injection well to effect the securing. The sleeve 10 is used for mounting the water injection well, and the structure is simple and the mounting is convenient. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
The application also has the following implementation mode that the logging pipeline 3 penetrates through the shell 5 along the length direction of the screw pump and extends into the water injection well; wherein at least one of the screw pump and the logging pipe 3 is arranged eccentrically with respect to the water injection well. The position of the shell 5, which is close to the water outlet, is provided with a mounting hole corresponding to the logging pipeline 3, so that a certain distance is reserved between the logging pipeline 3 and the screw pump. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, the main body of the housing 5 is a groove-shaped structure, one side of the main body, opposite to the end cover 5.1, is provided with a water outlet connected with the screw pump and a mounting hole for mounting the logging pipeline 3, one side of the housing 5 is provided with a water inlet, so that the water inlet is perpendicular to the water outlet and the logging pipeline 3, and the transmission assembly 6 and the fixing piece 7 are correspondingly mounted at the corresponding water outlet inside the housing 5; correspondingly, the end cover 5.1 is provided with a mounting hole corresponding to the housing 5 and used for mounting the logging pipeline 3, and the logging pipeline 3 sequentially penetrates through the mounting holes in the end cover 5.1 and the housing 5 and is in sealing connection with the mounting hole, specifically, can be sealed through a sealing gasket or a sealing flange. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, the housing 5 is one of a square, circular or oval shaped channel, and correspondingly, the end cap 5.1 is one of a square, circular or oval shape corresponding to the housing 5. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
This application still has following embodiment, is equipped with sealing connection between casing 5 and the logging pipeline 3 to make logging pipeline 3 form independent logging passageway in casing 5, make water injection chamber and logging pipeline 3 keep relatively independent, with the purpose that the screw pump that does not dismantle carries out borehole operation. Specifically, a sealing ring is arranged between the shell 5 and the logging pipeline 3, and leakage can not occur in the high-pressure water injection process. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some cases, a sealing sleeve corresponding to the logging pipe 3 is provided on the housing 5 or the end cap 5.1, and the sealing sleeve is connected to the housing 5 or the end cap 5.1 through a screw to realize further sealing.
The application also has an embodiment wherein the logging pipe 3 is provided with a valve 4. The logging pipeline 3 is controlled through the valve 4, the valve 4 is opened during the operation in the well, and the valve 4 is closed in the conventional water injection stage so as to prevent leakage in the high-pressure water injection process. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some embodiments, one end of the valve 4 is fixedly connected with one end of the logging pipeline 3 through a clamp, and the other end of the valve is connected with an adapter through the clamp so as to butt joint equipment required by the operation in the well. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
This application still has following embodiment, sets up switch board 1, switch board 1 and driving motor 2 electric connection, specifically, switch board 1 passes through cable electric connection with electric driving motor 2, and switch board 1 includes the converter, thereby can the accurate control driving motor 2 rotational speed satisfy on-the-spot water injection demand. A GPRS remote control module is arranged on a controller in the control cabinet 1, and real-time monitoring and control on a visual platform are achieved. The controller is provided with a unit protection module, and a closed-loop control system aiming at the driving motor 2 is arranged in the control cabinet 1, so that three closed-loop control of current feedback, speed feedback and position feedback of the driving motor 2 can be realized.
To sum up, this application provides an offset screw rod pressure boost water injection device, after the water inlet that comes through the water injection device of water injection station got into the water injection device, operation switch board 1 started driving motor 2, and driving motor 2 passes through drive assembly 6 and passes to the screw pump with power, and the rotatory running water that will come the water injection station of drive screw pump pours into the water injection well into, and the screw pump is rotatory simultaneously to further rise water pressure, reaches the purpose of pressure boost. When the screw pump is pressurized and injected with water, the fixing member 7 contains a thrust bearing 16 and a cylindrical roller bearing 15, and bears the axial force and the reverse thrust forced by the water pressure.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.

Claims (10)

1. An offset screw boosting water injection device for injecting water or performing well operations into a water injection well, the water injection device comprising:
the shell is hermetically connected with the water injection well;
the screw pump is arranged on the shell, extends into the water injection well and is used for injecting water into the water injection well;
the well logging pipeline is arranged on the shell, is parallel to the screw pump and extends into the water injection well, and is used for performing in-well operation on the water injection well; wherein the downhole operation comprises at least: logging, well washing and profile control;
and injecting water into the water injection well through the screw pump and performing in-well operation on the water injection well through the logging channel at the same time.
2. The offset screw boosting water injection device according to claim 1, wherein one end of the screw pump is connected to the water outlet of the housing, and the other end of the screw pump extends into the water injection well.
3. The offset screw pressurized water injection apparatus according to claim 2, wherein the screw pump comprises a liner, a rotor and a stator;
one end of the lining is connected to the water outlet, and the other end of the lining extends into the water injection well;
the stator is arranged in the lining, one end of the rotor is connected with the transmission shaft, the other end of the rotor is arranged in the stator, and the rotor is driven by the transmission shaft to rotate in the stator so as to inject water into the water injection well.
4. The offset screw rod pressurizing water injection device according to claim 3, wherein a fixing piece corresponding to the transmission shaft is arranged inside the shell, the fixing piece is fixedly connected to the water outlet of the shell, and a mounting part is arranged on the fixing piece;
one end of the transmission shaft is installed in the installation part, and the end part of the transmission shaft extends out of the fixing part and is connected with the driving mechanism so as to transmit the power of the driving mechanism to the rotor and drive the rotor to rotate.
5. The offset screw rod pressurizing water injection device according to claim 4, wherein the mounting part is an annular protrusion which is arranged on the inner side wall of the fixing part and extends inwards along the radial direction of the fixing part, and correspondingly, a shaft shoulder is arranged on the transmission shaft and is matched with the annular protrusion to axially limit the transmission shaft.
6. The offset screw rod pressurizing water injection device according to claim 5, wherein the driving mechanism is a driving motor, the driving motor is disposed on the outer wall of the housing, and a main shaft of the driving motor extends into the housing and is connected to one end of the transmission shaft through a transmission assembly, wherein the transmission assembly is used for transmitting output power of the main shaft to the transmission shaft.
7. The offset screw rod pressurizing water injection device according to claim 1, wherein a first flange corresponding to the screw pump and the logging pipeline is arranged on the shell; correspondingly, a casing is arranged at the wellhead of the water injection well, and a second flange matched with the first flange is arranged on the casing;
the screw pump and the logging pipeline sequentially penetrate through the first flange and the second flange and extend into the casing.
8. The offset screw boosting water injection apparatus according to claim 1, wherein the logging pipeline extends through the housing into the water injection well along a length direction of the screw pump;
wherein at least one of the progressive cavity pump and the logging pipe is eccentrically arranged with respect to the water injection well.
9. The offset screw pressurized water injection apparatus according to claim 8, wherein the housing is sealingly connected to the logging pipe.
10. The offset screw pressurized water injection device according to any one of claims 1 to 9, wherein a valve is arranged on the logging pipeline.
CN202011519964.9A 2020-12-21 2020-12-21 Offset screw pressurizing water injection device Pending CN112539048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011519964.9A CN112539048A (en) 2020-12-21 2020-12-21 Offset screw pressurizing water injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011519964.9A CN112539048A (en) 2020-12-21 2020-12-21 Offset screw pressurizing water injection device

Publications (1)

Publication Number Publication Date
CN112539048A true CN112539048A (en) 2021-03-23

Family

ID=75019382

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011519964.9A Pending CN112539048A (en) 2020-12-21 2020-12-21 Offset screw pressurizing water injection device

Country Status (1)

Country Link
CN (1) CN112539048A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU213630U1 (en) * 2022-04-14 2022-09-20 Общество с ограниченной ответственностью "ЛУКОЙЛ-ПЕРМЬ" Device for pumping fluid into the formation
CN116123081A (en) * 2022-11-21 2023-05-16 重庆富飞机械制造有限公司 Single screw booster water injection pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU213630U1 (en) * 2022-04-14 2022-09-20 Общество с ограниченной ответственностью "ЛУКОЙЛ-ПЕРМЬ" Device for pumping fluid into the formation
CN116123081A (en) * 2022-11-21 2023-05-16 重庆富飞机械制造有限公司 Single screw booster water injection pump

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