WO2020151279A1 - 适用于石油领域的全金属锥形组合螺杆泵 - Google Patents

适用于石油领域的全金属锥形组合螺杆泵 Download PDF

Info

Publication number
WO2020151279A1
WO2020151279A1 PCT/CN2019/113652 CN2019113652W WO2020151279A1 WO 2020151279 A1 WO2020151279 A1 WO 2020151279A1 CN 2019113652 W CN2019113652 W CN 2019113652W WO 2020151279 A1 WO2020151279 A1 WO 2020151279A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
screw pump
connecting shaft
sucker rod
connecting seat
Prior art date
Application number
PCT/CN2019/113652
Other languages
English (en)
French (fr)
Inventor
梁海洋
周光
张志海
Original Assignee
无锡恒信北石科技有限公司
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 无锡恒信北石科技有限公司 filed Critical 无锡恒信北石科技有限公司
Priority to CA3127546A priority Critical patent/CA3127546C/en
Priority to US17/425,314 priority patent/US11841018B2/en
Priority to EP19911151.9A priority patent/EP3916230B1/en
Publication of WO2020151279A1 publication Critical patent/WO2020151279A1/zh

Links

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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • 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
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • 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
    • 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
    • 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
    • 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
    • F04C2/1073—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 where one member is stationary while the other member rotates and orbits
    • 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
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
    • 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
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0046—Internal leakage control
    • 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
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil
    • 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
    • F04C2240/00—Components
    • F04C2240/10—Stators
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • 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
    • F04C2250/00—Geometry
    • F04C2250/20—Geometry of the rotor
    • F04C2250/201—Geometry of the rotor conical shape

Definitions

  • the invention relates to the field of special pumps for petroleum exploitation, in particular to an all-metal conical combined screw pump suitable for the petroleum field.
  • Gas injection oil recovery is aimed at viscous crude oil. Hot steam is injected into the oil field to reduce the viscosity of the heavy oil and facilitate the exploitation.
  • the stator and rotor of the all-metal screw pump are made of metal, which has strong high temperature resistance and does not need to be taken out during the gas injection process. Therefore, the all-metal screw pump has unique advantages compared with the rubber screw pump when it is suitable for gas injection oil production.
  • the radial dimensions of the stator and rotor of the existing metal screw pump are kept uniform along the longitudinal direction.
  • the sand mixed in the crude oil will wear the stator and the rotor, resulting in an increase in the gap between the stator and the rotor.
  • the pumping pressure of the metal screw pump is reduced, and the pumping pressure is reduced, the crude oil cannot be pumped out, that is, the screw pump needs to be replaced, so the service life of the screw pump is short; in addition, when the pumping pressure is reduced or the power is cut, Sand is deposited in the gap between the stator and the rotor, and the rotor is easy to jam, that is, sand jam phenomenon occurs.
  • the invention provides an all-metal conical combined screw pump suitable for the petroleum field, which can completely solve the technical problems of short service life and sand stuck of the existing all-metal screw pump.
  • a full-metal conical combined screw pump suitable for the petroleum field includes a stator, a rotor, a sleeve and a sucker rod, the stator is provided with an internally threaded curved surface, and the rotor is mounted on the stator Inside and provided with an external threaded curved surface matched with the internal threaded curved surface, the sleeve is connected with the stator, and the sucker rod is installed in the sleeve, characterized in that: the internal threaded curved surface and the The outer threaded surfaces are both tapered spiral structures and have the same taper.
  • the end of the inner threaded surface and the outer threaded surface with a larger radial size is adjacent to the sucker rod;
  • the all-metal conical combined screw pump also includes an elastic telescopic component ,
  • the elastic telescopic assembly includes a movable part, a fixed part, and an elastic part, the movable part is fixedly connected to the rotor, the fixed part is fixedly connected to the sucker rod, the movable part and the fixed part are upper, The downward sliding fit can transmit torque to the sucker rod and the rotor.
  • the elastic member can be elastically contracted or elastically expanded along the sliding direction of the movable member.
  • the movable part is a connecting shaft
  • the fixed part is a connecting seat
  • the elastic part is a spring
  • the elastic telescopic component further includes a limiting component
  • the connecting shaft is inserted into the cavity of the connecting seat.
  • the connecting shaft can move along the axis of the connecting seat and can transmit torque by cooperating with the connecting seat
  • the spring is sleeved on the connecting shaft and/or the connecting seat, and one end of the spring abuts
  • the connecting seat or the sucker rod has the other end against the connecting shaft or the rotor
  • the limiting component is used to prevent the connecting shaft from being separated from the connecting seat.
  • the end of the rotor adjacent to the connecting shaft is connected with a first threaded joint
  • the end of the connecting shaft adjacent to the rotor is connected with a second threaded joint.
  • the second threaded joint is connected by a threaded sleeve; the connecting seat is integrally formed or fixedly installed on the sucker rod.
  • the connecting shaft is provided with a step that matches the limit of the limit plate.
  • the movable part is a connecting seat
  • the fixed part is a connecting shaft
  • the elastic part is a spring
  • the elastic telescopic component further includes a limiting component
  • the connecting shaft is inserted into the cavity of the connecting seat.
  • the connecting shaft can move along the axis of the connecting seat and can transmit torque by cooperating with the connecting seat
  • the spring is sleeved on the connecting shaft and/or the connecting seat, and one end of the spring abuts
  • the connecting seat or the rotor, and the other end abuts against the connecting shaft or the sucker rod
  • the limiting component is used to prevent the connecting shaft from separating from the connecting seat.
  • the limiting component includes a first outer flange and a limiting plate that are in a limiting fit, and the first outer flange is connected to the end of the connecting shaft adjacent to the connecting seat and protrudes outward in the diameter direction. It is provided that the limit plate is connected to the end of the connecting seat adjacent to the connecting shaft and protrudes inward along the diameter direction.
  • the end of the connecting shaft adjacent to the first outer flange is provided with external teeth
  • the limiting plate is provided with internal teeth
  • the external teeth mesh with the internal teeth
  • the first outer flange is provided with external teeth
  • the cavity is provided with internal teeth
  • the external teeth mesh with the internal teeth
  • the internal threaded surface is an M-head thread
  • the external thread is an N-head thread
  • the value of M is 2 to 4
  • the value of N is 1 to 3
  • M N+1.
  • the all-metal conical combined screw pump further includes an auger, the auger includes a central shaft and a spiral blade surrounding and fixed outside the central shaft, the auger is arranged on the rotor and the pump Between the rods and between two adjacent sucker rods, the two ends of the central shaft are respectively detachably fixedly connected with the corresponding rotor and the corresponding sucker rod.
  • stator is integral or formed by fixedly connecting two or more stator units in the axial direction.
  • the beneficial effects of the present invention are as follows: (1) When the stator and rotor are worn, the internal thread surface and the external thread surface are uniformly worn, and the degree of wear is the same everywhere. Since the internal thread surface and the external thread surface are both tapered spiral structures and have the same taper, After wear, adjust the axial position of the rotor, that is, move the rotor down, so that the outer threaded surface with a larger radial size on the upper side of the rotor before moving down and the radial size of the lower side of the stator after being worn down can change.
  • the large inner spiral surface is matched to realize that the gap between the adjusted inner thread surface and the outer thread surface still maintains the size before wear, thereby ensuring the pumping pressure of the all-metal conical combined screw pump to ensure that the crude oil is pumped and maintained
  • the higher liquid output effectively prolongs the service life of the all-metal conical combined screw pump, while improving the efficiency of the screw pump and reducing energy consumption; (2) After the stator and rotor are worn, no additional labor is required, and it can be stretched elastically.
  • the sucker rod, in use, the rotor and stator have a cone-shaped structure with a large upper and a small lower.
  • the present invention also adds auger.
  • the auger still has the function of conveying the sand that is pumped up by the rotor and then falls down. Specifically, each auger has the function of pushing the falling sand upward.
  • a continuous cycle of rising and falling is formed between adjacent augers, which can effectively prevent sand from depositing between the rotor and the stator, thereby effectively reducing wear and extending the service life of the pump;
  • the meter shows that the liquid volume is reduced , Each auger is still in rotating work, maintains the upward push of the falling sand, and further prevents the rotor from jamming.
  • Figure 1 is a schematic diagram of the structure of the all-metal conical combined screw pump of the present invention.
  • Figure 2 is a schematic diagram of the structure of the elastic telescopic component of the present invention.
  • the all-metal conical composite screw pump suitable for the petroleum field includes a stator, a rotor 2, a sleeve 3 and a sucker rod 4.
  • the stator consists of two or more stator units 1 along the axial direction.
  • the fixed connection is formed, the stator is provided with an internal threaded curved surface, the rotor 2 is installed in the stator and is provided with an external threaded curved surface matched with the internal threaded curved surface, the internal threaded curved surface is a double-threaded thread, and the external thread is a single-threaded thread.
  • the M of the internal thread surface can also be 3 or 4
  • the N of the external thread surface can also be 2 or 3
  • M N+1
  • the stator is fixedly connected to the casing 3
  • the sucker rod 4 is installed in the casing 3, the sucker rod as a whole is formed by a detachable fixed connection of several sucker rods.
  • the internal thread surface and the external thread surface are both tapered spiral structures and the same taper.
  • the radial dimensions of the internal thread surface and the external thread surface are large. One end is close to the sucker rod 4.
  • Figures 1 and 2 are in the side-placed state.
  • the all-metal conical combined screw pump is in an upright state when in use, that is, the radial dimension of the upper end of the inner thread surface and the outer thread surface is compared with the diameter of the lower end.
  • the size is large;
  • the all-metal conical combined screw pump also includes elastic telescopic components, the elastic telescopic components include movable parts, fixed parts and elastic parts, the movable parts are fixedly connected with the rotor, the fixed parts are fixedly connected with the sucker rod, and the movable parts and fixed
  • the part is a sliding fit in the up and down direction and can transmit torque for the sucker rod and the rotor.
  • One end of the elastic part abuts against the movable part and the other end against the fixed part.
  • the elastic part can elastically contract or expand along the sliding direction of the movable part.
  • the movable part is the connecting shaft 6,
  • the fixed part is the connecting seat 12,
  • the elastic telescoping component also includes a spring 15 and a limiting component, and
  • the connecting shaft 6 includes a second threaded connector 7 and a second outer which are sequentially connected along the axial direction.
  • the flange 8, the main body 9, the engaging portion 10 and the first outer flange 11, the connecting seat is provided with a cavity 13 and a limiting plate 14 installed at the opening of the cavity 13 and extending inward in the diameter direction, connecting the shaft
  • the engaging portion 10 passes through the limiting plate, and the first outer flange 11 is inserted into the cavity 13 of the connecting seat 12, so that the connecting shaft 6 can move along the axis of the connecting seat 12, and the connecting shaft 6 and the first outer flange
  • the adjacent end, namely the meshing portion 10 is provided with external teeth
  • the limiting plate 14 is provided with internal teeth.
  • the external teeth mesh with the internal teeth, that is, in the form of splines, the connecting shaft can transmit torque through cooperation with the connecting seat 12.
  • the spring 15 is sleeved outside the connecting shaft 6. One end of the spring 15 abuts the connecting seat 12 and the other end abuts the second outer flange 8 of the connecting shaft to realize the functions of elastic expansion and contraction.
  • the limiting component includes a first outer flange. The flange 11 and the limiting plate 14, the first outer flange 11 is connected to the end of the connecting shaft 6 adjacent to the connecting seat 12 and protruding outward in the diameter direction, the limiting plate 14 is connected to the connecting seat 12 adjacent to the connecting shaft 6 The end portion is convex inward along the diameter direction, and the first outer flange 11 and the limiting plate 14 are in position-limiting cooperation to prevent the connecting shaft 6 from being separated from the connecting seat 12.
  • the end of the rotor adjacent to the connecting shaft 6 is connected with a first threaded joint 5, and the end of the connecting shaft 6 adjacent to the rotor is connected with a second threaded joint 7.
  • the first threaded joint 5 and the second threaded joint 7 pass through a threaded sleeve 16 Connection;
  • the connecting seat 12 is integrally formed at the lower end of the sucker rod or fixedly installed at the lower end of the sucker rod, wherein the fixed installation can be detachable by a threaded structure.
  • step 19 that matches with the limit plate 14 to prevent the spring 15 from being compressed during assembly, protect the spring 15 and ensure the effective function of the spring 15.
  • the all-metal conical combined screw pump also includes a screw auger.
  • the screw auger includes a central shaft 17 and a spiral blade 18 that surrounds and is fixed outside the central shaft 17.
  • the screw auger is arranged between the rotor 2 and the sucker rod 4 and two adjacent sections. Between the sucker rods 4, the two ends of the central shaft 6 are detachably and fixedly connected with the corresponding rotor 2 and the corresponding sucker rod 4 through a threaded structure and a lock nut 7; the diameter of the central shaft 17 is larger than the sucker rod 4 Diameter to improve the connection strength of the auger.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

一种全金属锥形组合螺杆泵，用于石油领域，其包括定子、转子（2）、套管（3）和抽油杆（4），内螺纹曲面和外螺纹曲面均为锥形螺旋结构并且锥度相同，内螺纹曲面和外螺纹曲面的径向尺寸大的一端临近抽油杆；全金属锥形组合螺杆泵还包括弹性伸缩组件，弹性伸缩组件包括活动件、固定件和弹性件，活动件与转子固定连接，固定件与抽油杆固定连接，活动件和固定件为上、下方向的滑动配合并且能够为抽油杆和转子传递扭矩，弹性件的一端抵靠活动件或转子、另一端抵靠固定件或抽油杆，弹性件能够沿活动件的滑动方向弹性收缩或弹性扩张。其能解决现有全金属螺杆泵使用寿命短和砂卡的技术问题。

Description

适用于石油领域的全金属锥形组合螺杆泵 技术领域
本发明涉及石油开采专用泵领域，具体涉及适用于石油领域的全金属锥形组合螺杆泵。
 背景技术
注气式采油是针对粘稠的原油，将热蒸汽注入油田，使得稠油的粘度降低，从而便于开采。
由于热蒸汽会加速橡胶螺杆泵的橡胶老化，故注气时，橡胶螺杆泵抬升后取出的，导致工时耗费时间长，效率较低。而全金属螺杆泵的定子和转子均为金属材质，耐高温性能强，在注气过程中无需取出。因此，全金属螺杆泵在适用于注气式采油时，相较于橡胶螺杆泵具有独特的优势。
 技术问题
现有的金属螺杆泵的定子和转子的径向尺寸是沿纵向都是保持均一的，在使用过程中，参杂于原油中的砂子将磨损定子和转子，导致定子和转子之间的间隙增大，致使金属螺杆泵的抽油压力降低，而抽油压力降低，将导致无法将原油泵出，即需更换螺杆泵，故螺杆泵使用寿命短；此外，当抽油压力降低或者停电后，砂子沉积于定子和转子之间的间隙内，转子容易卡死，即发生砂卡现象。
 技术解决方案
本发明提供了适用于石油领域的全金属锥形组合螺杆泵，其能彻底解决现有全金属螺杆泵使用寿命短和砂卡的技术问题。
其技术方案是这样的，适用于石油领域的全金属锥形组合螺杆泵，其包括定子、转子、套管和抽油杆，所述定子设有内螺纹曲面，所述转子安装于所述定子内并且设有与所述内螺纹曲面配合的外螺纹曲面，所述套管与所述定子连接，所述抽油杆安装于所述套管内，其特征在于：所述内螺纹曲面和所述外螺纹曲面均为锥形螺旋结构并且锥度相同，所述内螺纹曲面和所述外螺纹曲面的径向尺寸大的一端临近抽油杆；所述全金属锥形组合螺杆泵还包括弹性伸缩组件，所述弹性伸缩组件包括活动件、固定件和弹性件，所述活动件与所述转子固定连接，所述固定件与抽油杆固定连接，所述活动件和所述固定件为上、下方向的滑动配合并且能够为所述抽油杆和所述转子传递扭矩，所述弹性件的一端抵靠所述活动件或所述转子、另一端抵靠所述固定件或所述抽油杆，所述弹性件能够沿所述活动件的滑动方向弹性收缩或弹性扩张。
进一步的，所述活动件为连接轴，所述固定件为连接座，所述弹性件为弹簧，所述弹性伸缩组件还包括限位组件，所述连接轴插装于所述连接座的腔体内，所述连接轴能够沿连接座的轴线方向移动并且能够通过与所述连接座配合传递扭矩，所述弹簧套设于所述连接轴和/或连接座外，所述弹簧的一端抵靠所述连接座或所述抽油杆、另一端抵靠所述连接轴或所述转子，所述限位组件用于防止连接轴脱离所述连接座。
更进一步的，所述转子与所述连接轴邻接的端部连接有第一螺纹接头，所述连接轴与所述转子邻接的端部连接有第二螺纹接头，所述第一螺纹接头和所述第二螺纹接头通过螺纹套管连接；所述连接座一体成型或固定安装于所述抽油杆。
更进一步的，所述连接轴开设有与所述限位板限位配合的台阶。
进一步的，所述活动件为连接座，所述固定件为连接轴，所述弹性件为弹簧，所述弹性伸缩组件还包括限位组件，所述连接轴插装于所述连接座的腔体内，所述连接轴能够沿连接座的轴线方向移动并且能够通过与所述连接座配合传递扭矩，所述弹簧套设于所述连接轴和/或连接座外，所述弹簧的一端抵靠所述连接座或所述转子、另一端抵靠所述连接轴或所述抽油杆，所述限位组件用于防止连接轴脱离所述连接座。
更进一步的，所述限位组件包括限位配合的第一外凸缘和限位板，所述第一外凸缘连接于所述连接轴邻接连接座的端部并且沿直径方向向外凸设，所述限位板连接于所述连接座邻接连接轴的端部并且沿直径方向向内凸设。
更进一步的，所述连接轴与第一外凸缘相邻的端部设有外齿，所述限位板设有内齿，所述外齿与所述内齿啮合。
更进一步的，所述第一外凸缘设有外齿，所述腔体设有内齿，所述外齿与所述内齿啮合。
进一步的，所述内螺纹曲面为M头螺纹，所述外螺纹为N头螺纹，所述M取值为2~4，所述N取值为1~3，M=N+1。
进一步的，所述全金属锥形组合螺杆泵还包括绞龙，所述绞龙包括中心轴和围绕并且固定于中心轴外的螺旋叶片，所述绞龙设置于所述转子和所述抽油杆之间以及相邻两节抽油杆之间，中心轴的两端分别与相应的所述转子、相应的所述抽油杆可拆卸地固定连接。
进一步的，所述定子为整体式或由2节以上定子单体沿轴向固定连接形成。
 有益效果
本发明有益效果如下：（1）在定子和转子磨损是内螺纹曲面和外螺纹曲面均匀磨损，各处磨损程度一致，由于内螺纹曲面和外螺纹曲面均为锥形螺旋结构并且锥度相同，在磨损后，调整转子的轴向位置，即转子下移，能够使得下移前、处于转子上侧的径向尺寸较大的外螺纹曲面在下移后与定子下侧的、磨损后径向尺寸变大的内螺旋曲面相配合，实现调整后的内螺纹曲面和外螺纹曲面之间的间隙仍然保持磨损前的大小，进而保证全金属锥形组合螺杆泵的抽油压力，确保原油泵出并维持较高的出液量，进而有效延长全金属锥形组合螺杆泵的使用寿命，同时能够提高螺杆泵的效率和降低能耗；（2）在定子和转子磨损后，无需额外人工，通过弹性伸缩组件中的弹性件的弹性扩张以及转子自重，转子相对于抽油杆向下移动，使得内螺纹曲面和外螺纹曲面之间的间隙能够自动补偿，弹性件的弹性作用还能确保转子的外螺纹面与定子的内螺纹面的有效接触、密封，进而实现泵体压力、泵效的保持，确保砂子泵出，避免砂卡；（3）内螺纹曲面和外螺纹曲面的径向尺寸大的一端临近抽油杆，在使用状态下，转子、定子为上大下小的锥形结构，即使停电后砂子沉积于定子和转子之间的间隙内，转子也不易卡死；（4）停电后砂子沉积于定子和转子之间的间隙内，来电后，在转子旋转过程中，沉积的砂子对转子具有向上的推力，同时，通过弹性伸缩组件的弹性件的弹性收缩，使得转子具有相对于抽油杆向上移动的空间，进而转子上移，内螺纹曲面和外螺纹曲面之间的间隙变大，实现解卡；（5）通过弹性伸缩组件的弹性件的弹性缓冲，在装配的过程中，能够避免转子受伤；（6）本发明还增设了绞龙，绞龙对由转子向上泵送后向下回落的砂子仍具有输送作用，具体的，各个绞龙对下落的砂子具有向上推送的作用，砂子于相邻绞龙之间形成上升-回落的不断循环，能够有效防止砂子于转子和定子之间沉积，进而有效减小磨损，延长泵的使用寿命；（7）当仪表显示出液量降低时，各个绞龙仍然处于旋转工作中，保持对下落的砂子的向上推送的作用，进一步避免转子卡死，因此，能够有效避免扭力积聚以及断裂的风险；（8）即使停电后，砂子也能够部分沉积于各个绞龙的螺旋叶片上，减小于定子和转子之间的间隙内堆积，更进一步避免转子卡死；（9）由于全金属锥形组合螺杆泵使用寿命的延长，能够降低其更换频率，进而减少更换全金属锥形组合螺杆泵所产生的时耗，提高原油产量。
 附图说明
图1为本发明的全金属锥形组合螺杆泵的结构示意图。
图2为本发明的弹性伸缩组件的结构示意图。
 本发明的实施方式
如图1、图2所示，适用于石油领域的全金属锥形组合螺杆泵，其包括定子、转子2、套管3和抽油杆4，定子由2节以上定子单体1沿轴向固定连接形成，定子设有内螺纹曲面，转子2安装于定子内并且设有与内螺纹曲面配合的外螺纹曲面，内螺纹曲面为双头螺纹，外螺纹为单头螺纹，其它实施例中，内螺纹曲面的M也可以取值为3或4，外螺纹曲面的N也可以取值为2或3，M=N+1，定子与套管3固定连接，抽油杆4安装于套管3内，抽油杆整体由若干节抽油杆可拆卸地固定连接形成，内螺纹曲面和外螺纹曲面均为锥形螺旋结构并且锥度相同，内螺纹曲面和外螺纹曲面的径向尺寸大的一端临近抽油杆4，图1、图2为侧放状态，全金属锥形组合螺杆泵在使用时是竖立状态，即内螺纹曲面和外螺纹曲面的上端的径向尺寸相比下端的径向尺寸大；全金属锥形组合螺杆泵还包括弹性伸缩组件，弹性伸缩组件包括活动件、固定件和弹性件，活动件与转子固定连接，固定件与抽油杆固定连接，活动件和固定件为上、下方向的滑动配合并且能够为抽油杆和转子传递扭矩，弹性件的一端抵靠活动件、另一端抵靠固定件，弹性件能够沿活动件的滑动方向弹性收缩或弹性扩张；具体的，活动件为连接轴6，固定件为连接座12，弹性伸缩组件还包括弹簧15和限位组件，连接轴6包括沿轴向依次连接的第二螺纹连接头7、第二外凸缘8、主体9、啮合部10和第一外凸缘11， 连接座设有腔体13以及安装于腔体13的开口处并沿直径方向向内延伸的限位板14，连接轴的啮合部10穿过限位板，第一外凸缘11插装于连接座12的腔体13内，使得连接轴6能够沿连接座12的轴线方向移动，连接轴6与第一外凸缘相邻的端部，即啮合部10设有外齿，限位板14设有内齿，外齿与内齿啮合，即以花键的形式使得连接轴能够通过与连接座12配合传递扭矩，弹簧15套设于连接轴6外，弹簧15的一端抵靠连接座12、另一端抵靠连接轴的第二外凸缘8，实现弹性伸缩和弹性扩张的功能，限位组件包括第一外凸缘11和限位板14，第一外凸缘11连接于连接轴6邻接连接座12的端部并且沿直径方向向外凸设，限位板14连接于连接座12邻接连接轴6的端部并且沿直径方向向内凸设, 通过第一外凸缘11和限位板14限位配合进而防止连接轴6脱离连接座12。
转子与连接轴6邻接的端部连接有第一螺纹接头5，连接轴6与转子邻接的端部连接有第二螺纹接头7，第一螺纹接头5和第二螺纹接头7通过螺纹套管16连接；连接座12一体成型于抽油杆下端或固定安装于抽油杆下端，其中固定安装可采用螺纹结构实现可拆卸。
连接轴的内核部10和主体9之间开设有与限位板14限位配合的台阶19，防止装配时弹簧15受压过渡，对弹簧15起保护作用，确保弹簧15有效作用。
全金属锥形组合螺杆泵还包括绞龙，绞龙包括中心轴17和围绕并且固定于中心轴17外的螺旋叶片18，绞龙设置于转子2和抽油杆4之间以及相邻两节抽油杆4之间，中心轴6的两端分别与相应的转子2、相应的抽油杆4通过螺纹结构和锁紧螺母7可拆卸地固定连接；中心轴17的直径大于抽油杆4的直径，以提高绞龙的连接强度。

Claims (11)

  1. 适用于石油领域的全金属锥形组合螺杆泵，其包括定子、转子、套管和抽油杆，所述定子设有内螺纹曲面，所述转子安装于所述定子内并且设有与所述内螺纹曲面配合的外螺纹曲面，所述套管与所述定子连接，所述抽油杆安装于所述套管内，其特征在于：所述内螺纹曲面和所述外螺纹曲面均为锥形螺旋结构并且锥度相同，所述内螺纹曲面和所述外螺纹曲面的径向尺寸大的一端临近抽油杆；所述全金属锥形组合螺杆泵还包括弹性伸缩组件，所述弹性伸缩组件包括活动件、固定件和弹性件，所述活动件与所述转子固定连接，所述固定件与抽油杆固定连接，所述活动件和所述固定件为上、下方向的滑动配合并且能够为所述抽油杆和所述转子传递扭矩，所述弹性件的一端抵靠所述活动件或所述转子、另一端抵靠所述固定件或所述抽油杆，所述弹性件能够沿所述活动件的滑动方向弹性收缩或弹性扩张。
  2. 根据权利要求1所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述活动件为连接轴，所述固定件为连接座，所述弹性件为弹簧，所述弹性伸缩组件还包括限位组件，所述连接轴插装于所述连接座的腔体内，所述连接轴能够沿连接座的轴线方向移动并且能够通过与所述连接座配合传递扭矩，所述弹簧套设于所述连接轴和/或连接座外，所述弹簧的一端抵靠所述连接座或所述抽油杆、另一端抵靠所述连接轴或所述转子，所述限位组件用于防止连接轴脱离所述连接座。
  3. 根据权利要求2所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述转子与所述连接轴邻接的端部连接有第一螺纹接头，所述连接轴与所述转子邻接的端部连接有第二螺纹接头，所述第一螺纹接头和所述第二螺纹接头通过螺纹套管连接；所述连接座一体成型或固定安装于所述抽油杆。
  4. 根据权利要求2所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述连接轴开设有与所述限位板限位配合的台阶。
  5. 根据权利要求1所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述活动件为连接座，所述固定件为连接轴，所述弹性件为弹簧，所述弹性伸缩组件还包括限位组件，所述连接轴插装于所述连接座的腔体内，所述连接轴能够沿连接座的轴线方向移动并且能够通过与所述连接座配合传递扭矩，所述弹簧套设于所述连接轴和/或连接座外，所述弹簧的一端抵靠所述连接座或所述转子、另一端抵靠所述连接轴或所述抽油杆，所述限位组件用于防止连接轴脱离所述连接座。
  6. 根据权利要求2或5所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述限位组件包括限位配合的第一外凸缘和限位板，所述第一外凸缘连接于所述连接轴邻接连接座的端部并且沿直径方向向外凸设，所述限位板连接于所述连接座邻接连接轴的端部并且沿直径方向向内凸设。
  7. 根据权利要求6所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述连接轴与第一外凸缘相邻的端部设有外齿，所述限位板设有内齿，所述外齿与所述内齿啮合。
  8. 根据权利要求6所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述第一外凸缘设有外齿，所述腔体设有内齿，所述外齿与所述内齿啮合。
  9. 根据权利要求1所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述内螺纹曲面为M头螺纹，所述外螺纹为N头螺纹， M取值为2~4， N取值为1~3，M=N+1。
  10. 根据权利要求1所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述全金属锥形组合螺杆泵还包括绞龙，所述绞龙包括中心轴和围绕并且固定于中心轴外的螺旋叶片，所述绞龙设置于所述转子和所述抽油杆之间以及相邻两节抽油杆之间，中心轴的两端分别与相应的所述转子、相应的所述抽油杆可拆卸地固定连接。
  11. 根据权利要求1所述的适用于石油领域的全金属锥形组合螺杆泵，其特征在于：所述定子为整体式或由2节以上定子单体沿轴向固定连接形成。
PCT/CN2019/113652 2019-01-25 2019-10-28 适用于石油领域的全金属锥形组合螺杆泵 WO2020151279A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA3127546A CA3127546C (en) 2019-01-25 2019-10-28 All-metal conical combined screw pump suitable for field of petroleum
US17/425,314 US11841018B2 (en) 2019-01-25 2019-10-28 All-metal conical combined screw pump suitable for petroleum field
EP19911151.9A EP3916230B1 (en) 2019-01-25 2019-10-28 All-metal conical combined screw pump suitable for field of petroleum

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910071838.2 2019-01-25
CN201910071838.2A CN109723637A (zh) 2019-01-25 2019-01-25 适用于石油领域的全金属锥形组合螺杆泵

Publications (1)

Publication Number Publication Date
WO2020151279A1 true WO2020151279A1 (zh) 2020-07-30

Family

ID=66300348

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/113652 WO2020151279A1 (zh) 2019-01-25 2019-10-28 适用于石油领域的全金属锥形组合螺杆泵

Country Status (5)

Country Link
US (1) US11841018B2 (zh)
EP (1) EP3916230B1 (zh)
CN (1) CN109723637A (zh)
CA (1) CA3127546C (zh)
WO (1) WO2020151279A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109723637A (zh) 2019-01-25 2019-05-07 无锡恒信北石科技有限公司 适用于石油领域的全金属锥形组合螺杆泵
CN109736756B (zh) * 2019-03-06 2024-01-12 无锡恒信北石科技有限公司 一种应用全金属螺杆泵的智能化采油系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006063583A2 (de) * 2004-12-15 2006-06-22 Netzsch-Mohnopumpen Gmbh Exzenterschneckenpumpe in kompaktbauweise
CN104047846A (zh) * 2014-06-09 2014-09-17 无锡市恒烽水煤浆有限公司 耐磨损高压单螺杆泵
CN206608311U (zh) * 2017-03-29 2017-11-03 克拉玛依市熙海石油科技有限公司 一种限位可控筛管及全金属螺杆泵
CN109723637A (zh) * 2019-01-25 2019-05-07 无锡恒信北石科技有限公司 适用于石油领域的全金属锥形组合螺杆泵

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2192588A (en) * 1938-04-27 1940-03-05 Curtis Pump Co Drive and seal for pumps and the like
US2619040A (en) * 1949-03-15 1952-11-25 Maisch Oliver Liquid measuring and dispensing pump
DE3345233C2 (de) * 1983-12-14 1985-10-31 Joh. Heinrich Bornemann GmbH & Co KG, 3063 Obernkirchen Exzenterschneckenpumpe zum Fördern von Flüssigkeiten aus Bohrlöchern, insbesondere aus Erdöl-Bohrlöchern
US5015162A (en) * 1989-11-28 1991-05-14 Heppner Terry D Attachment for an oil well screw pump system
CA2049502C (en) * 1991-08-19 1994-03-29 James L. Weber Rotor placer for progressive cavity pump
US6368084B1 (en) * 2000-02-01 2002-04-09 Skillman Pump Company, Llp Downstroke sucker rod well pump
CN2525241Y (zh) * 2002-03-13 2002-12-11 大庆石油管理局 螺杆泵反转释放器
US7431095B2 (en) * 2005-10-04 2008-10-07 Baker Hughes Incorporated Non-tubing deployed well artificial lift system
EP1813812B1 (de) * 2006-01-26 2008-11-26 Grundfos Management A/S Exzenterschneckenpumpe
CA2612326C (en) * 2007-11-27 2011-06-14 Kudu Industries Inc. Progressing cavity pump assembly and method of operation
CN202250826U (zh) * 2011-09-21 2012-05-30 吴玉舒 油田采油用螺杆泵
CN104214070A (zh) * 2013-05-31 2014-12-17 杭州兴龙泵业有限公司 一种无轴螺旋送料螺杆泵
CN204851088U (zh) * 2015-08-05 2015-12-09 张川民 新型抽油泵脱接器
CN205503443U (zh) * 2016-03-31 2016-08-24 耐驰（兰州）泵业有限公司 一种具有锥形螺旋叶片腔体的螺杆泵
DE102016121582A1 (de) * 2016-11-10 2018-05-17 Seepex Gmbh Exzenterschneckenpumpe
EP3813744A4 (en) * 2018-06-05 2021-12-08 Carl Zeiss Meditec Cataract Technology Inc. OPHTHALMIC MICROSURGICAL TOOLS, SYSTEMS AND METHODS OF USE
CN209925195U (zh) * 2019-01-25 2020-01-10 无锡恒信北石科技有限公司 一种适用于石油领域的全金属锥形组合螺杆泵

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006063583A2 (de) * 2004-12-15 2006-06-22 Netzsch-Mohnopumpen Gmbh Exzenterschneckenpumpe in kompaktbauweise
CN101120173A (zh) * 2004-12-15 2008-02-06 奈赤-单体泵股份有限公司 紧凑结构类型的偏心螺杆泵
CN104047846A (zh) * 2014-06-09 2014-09-17 无锡市恒烽水煤浆有限公司 耐磨损高压单螺杆泵
CN206608311U (zh) * 2017-03-29 2017-11-03 克拉玛依市熙海石油科技有限公司 一种限位可控筛管及全金属螺杆泵
CN109723637A (zh) * 2019-01-25 2019-05-07 无锡恒信北石科技有限公司 适用于石油领域的全金属锥形组合螺杆泵

Also Published As

Publication number Publication date
EP3916230A1 (en) 2021-12-01
CN109723637A (zh) 2019-05-07
EP3916230B1 (en) 2023-12-06
CA3127546A1 (en) 2020-07-30
US11841018B2 (en) 2023-12-12
US20220090599A1 (en) 2022-03-24
CA3127546C (en) 2023-10-03
EP3916230A4 (en) 2022-04-13

Similar Documents

Publication Publication Date Title
CN100478574C (zh) 高弹性橡胶合金联轴器
CN104047846B (zh) 耐磨损高压单螺杆泵
WO2020151279A1 (zh) 适用于石油领域的全金属锥形组合螺杆泵
CA2754645C (en) Sucker rod centralizer
CN102619781A (zh) 一种压缩机叶轮与轴的连接装置和方法
CN108798553B (zh) 一种可调节高度的抽油杆扶正器
CN209925195U (zh) 一种适用于石油领域的全金属锥形组合螺杆泵
CN106150422B (zh) 一种油田泵井井口密封装置
CN202493521U (zh) 液压油缸缸头的连接结构
CN106917597A (zh) 油田抽油机盘根盒
CN101429936A (zh) 井下双螺杆式油气多相混抽泵
RU2787800C1 (ru) Винтовой насос для применения в нефтяной отрасли
CN215408516U (zh) 抽油杆旋转减磨工具
CN205841092U (zh) 分体式等壁厚螺杆马达及其螺杆钻具
CN113323863B (zh) 一种钻井泵快装组合活塞杆
CN209925196U (zh) 一种适用于石油领域的全金属螺杆泵
RU2386003C1 (ru) Героторный гидравлический двигатель
CN208619089U (zh) 一种双旋转抽油器
CN205618122U (zh) 一种密封器格兰及使用该密封器格兰的盘根盒
CN2434448Y (zh) 旋转柱塞抽油泵
US20160146381A1 (en) Assembly for producing a threaded connection for drilling and operating hydrocarbon wells, and method for producing such a threaded connection
CN209654223U (zh) 一种全金属螺杆泵
CN219975344U (zh) 一种污泥螺旋喂料机密封结构
CN111271006B (zh) 一种抽油杆扶正器
CN203891782U (zh) 鱼鳍式自旋转防偏磨抽油杆

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19911151

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 3127546

Country of ref document: CA

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2019911151

Country of ref document: EP

Effective date: 20210825