CN111173732B - Electric submersible screw pump - Google Patents
Electric submersible screw pump Download PDFInfo
- Publication number
- CN111173732B CN111173732B CN201911417981.9A CN201911417981A CN111173732B CN 111173732 B CN111173732 B CN 111173732B CN 201911417981 A CN201911417981 A CN 201911417981A CN 111173732 B CN111173732 B CN 111173732B
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- CN
- China
- Prior art keywords
- rotor
- stator
- connecting pipe
- screw pump
- electric submersible
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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- 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
- F04C2/1071—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 the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
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- 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
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/008—Pumps for submersible use, i.e. down-hole pumping
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- 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
- F04C15/0096—Heating; Cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an electric submersible screw pump, which comprises an upper connecting pipe, a lower connecting pipe, a stator and a rotor; the stator is arranged between the upper connecting pipe and the lower connecting pipe, a plurality of step shafts distributed at equal intervals are formed on the rotor, and each step shaft is sleeved with a rubber sleeve; the shape of each rubber sleeve is matched with the shape of the rotor; the cross section of the step shaft is in an equilateral triangle shape; the rotor is made of metal materials to increase the strength of the rotor and improve the wear resistance, the metal stator is sleeved and embedded with the plurality of rubber sleeves to realize flexible connection with the stator, the damage to the inner wall of the stator is avoided, in addition, heat generated after the rubber sleeves are rubbed can be quickly transferred to the metal part on the rotor to realize effective heat dissipation, so that the service life of the rotor is prolonged, the maintenance frequency is reduced, the continuous work is ensured, and the work efficiency is improved.
Description
Technical Field
The invention relates to an electric submersible screw pump.
Background
Along with the gradual deepening of oil field development, the proportion of thick oil, sand and medium and low yield wells is increased day by day, the traditional screw pump can cause frequent interruption and even production halt of oil well operation due to the conditions of pump clamping, rod clamping, pump abrasion, sucker rod breaking and the like caused by thick oil and sand production, and the electric submersible screw pump well solves the problems, so that the electric submersible screw pump is widely applied, is a product formed by combining the screw pump and the electric submersible pump, and mostly adopts a metal stator and a rubber rotor in the electric submersible screw pump in the prior art; the rubber used by the rotor is nitrile rubber and is formed by integral casting, but the rubber rotor is soft and not wear-resistant, the friction caused by rotation can cause the temperature rise, swelling and aging of the rubber rotor, the maintenance frequency is very high, the downtime is longer, the working efficiency is lower, and the improvement is to be further realized.
Disclosure of Invention
In view of the current situation of the prior art, the present invention provides an electrical submersible screw pump that increases the strength of the rotor, improves the wear resistance, and can effectively dissipate heat to prolong the service life of the rotor, thereby reducing the maintenance frequency and improving the working efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows: an electric submersible screw pump comprises an upper connecting pipe, a lower connecting pipe, a stator and a rotor; the rotor is rotatably arranged in the stator, and is characterized in that a plurality of step shafts distributed at equal intervals are formed on the rotor, and each step shaft is coated with a rubber sleeve; the shape of each rubber sleeve is matched with the shape of the rotor.
Preferably, the step shaft has an equilateral triangle cross-sectional shape.
Compared with the prior art, the invention has the advantages that: the rotor is made of metal materials to increase the strength of the rotor and improve the wear resistance, the metal stator is sleeved and embedded with the plurality of rubber sleeves to realize flexible connection with the stator, the damage to the inner wall of the stator is avoided, in addition, heat generated after the rubber sleeves are rubbed can be quickly transferred to the metal part on the rotor to realize effective heat dissipation, so that the service life of the rotor is prolonged, the maintenance frequency is reduced, the continuous work is ensured, and the work efficiency is improved.
Drawings
FIG. 1 is a cross-sectional structural view of the present invention;
FIG. 2 is a sectional structural view of a rotor of the present invention;
fig. 3 is a sectional view of the present invention at a.
Detailed Description
As shown in fig. 1 to 3, an electric submersible screw pump comprises an upper connecting pipe 1, a lower connecting pipe 4, a stator 3 and a rotor 2; the stator 4 is arranged between the upper connecting pipe 1 and the lower connecting pipe 4, one end of the stator 3 is inserted into and screwed into one end of the upper connecting pipe 1, the other end of the stator 3 is inserted into and screwed into one end of the lower connecting pipe 4, the rotor 2 is rotatably arranged inside the stator 3, and two ends of the rotor 2 respectively penetrate through the upper connecting pipe 1 and the lower connecting pipe 4 and respectively extend out of the other ends of the upper connecting pipe 1 and the lower connecting pipe 4; one end of the rotor 2 is connected with a sucker rod string, a sucker rod at the upper end of the sucker rod string is connected to a ground driving device through a polish rod slip, and after the ground driving device is started, the rotor 2 is driven to rotate in the stator 3 through the sucker rod string, so that underground crude oil is lifted to the ground; the scheme is characterized in that a plurality of step shafts 21 distributed at equal intervals are formed on the rotor 2, and each step shaft 21 is coated with a rubber sleeve 5; the shape of each rubber sleeve 5 is matched with the shape of the rotor 2; the step shaft 21 has an equilateral triangle cross-sectional shape to prevent the rubber sleeve 5 from rotating relative to the rotor 2.
Along with the gradual deepening of oil field development, the proportion of thick oil, sand and medium and low yield wells is increased day by day, the traditional screw pump can cause frequent interruption and even production halt of oil well operation due to the conditions of pump clamping, rod clamping, pump abrasion, sucker rod breaking and the like caused by thick oil and sand production, and the electric submersible screw pump well solves the problems, so that the electric submersible screw pump is widely applied, is a product formed by combining the screw pump and the electric submersible pump, and mostly adopts a metal stator and a rubber rotor in the electric submersible screw pump in the prior art; the rubber used by the rotor is nitrile rubber and is cast integrally, but the rubber rotor is soft and not wear-resistant, and friction caused by rotation can cause the temperature rise, swelling and aging of the rubber rotor, so that the maintenance frequency is high, the downtime is long, and the working efficiency is low; the rotor is made of metal materials to increase the strength of the rotor and improve the wear resistance, the plurality of rubber sleeves 5 are sleeved and embedded on the metal stator to realize flexible connection with the stator, the damage to the inner wall of the stator is avoided, in addition, heat generated after the rubber sleeves 5 rub can be quickly transferred to the metal part on the rotor to realize effective heat dissipation, so that the service life of the rotor is prolonged, the maintenance frequency is reduced, the continuous work is ensured, and the work efficiency is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. An electric submersible screw pump comprises an upper connecting pipe, a lower connecting pipe, a stator and a rotor; the rotor is made of metal materials, a plurality of step shafts distributed at equal intervals are formed on the rotor, and each step shaft is coated with a rubber sleeve; the shape of each rubber sleeve is matched with the shape of the rotor, and heat generated after the rubber sleeves are rubbed is transferred to the metal part on the rotor to realize heat dissipation.
2. An electric submersible screw pump according to claim 1, wherein the step shaft has an equilateral triangular cross-sectional shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417981.9A CN111173732B (en) | 2019-12-31 | 2019-12-31 | Electric submersible screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417981.9A CN111173732B (en) | 2019-12-31 | 2019-12-31 | Electric submersible screw pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111173732A CN111173732A (en) | 2020-05-19 |
| CN111173732B true CN111173732B (en) | 2022-05-17 |
Family
ID=70652398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911417981.9A Active CN111173732B (en) | 2019-12-31 | 2019-12-31 | Electric submersible screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111173732B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5221197A (en) * | 1991-08-08 | 1993-06-22 | Kochnev Anatoly M | Working member of a helical downhole motor for drilling wells |
| CN102174900B (en) * | 2011-03-08 | 2013-03-27 | 太原理工大学 | Top plate displacement monitoring device based on pretightening force |
| CN106151027A (en) * | 2016-08-31 | 2016-11-23 | 程巍 | Metal composite screw pump rotor |
| CN208106738U (en) * | 2018-04-02 | 2018-11-16 | 盐城世宏石油装备有限公司 | A kind of all-metal screw formula oil well pump |
-
2019
- 2019-12-31 CN CN201911417981.9A patent/CN111173732B/en active Active
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| Publication number | Publication date |
|---|---|
| CN111173732A (en) | 2020-05-19 |
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