WO2016037299A1 - 带井下驱动转换装置的潜没式抽油泵机组 - Google Patents

带井下驱动转换装置的潜没式抽油泵机组 Download PDF

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Publication number
WO2016037299A1
WO2016037299A1 PCT/CN2014/000831 CN2014000831W WO2016037299A1 WO 2016037299 A1 WO2016037299 A1 WO 2016037299A1 CN 2014000831 W CN2014000831 W CN 2014000831W WO 2016037299 A1 WO2016037299 A1 WO 2016037299A1
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Prior art keywords
conversion device
submersible
downhole
push
pull rod
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PCT/CN2014/000831
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English (en)
French (fr)
Inventor
赵锡寰
张瑞琪
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赵锡寰
张瑞琪
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Application filed by 赵锡寰, 张瑞琪 filed Critical 赵锡寰
Priority to PCT/CN2014/000831 priority Critical patent/WO2016037299A1/zh
Priority to PCT/CN2015/000631 priority patent/WO2016037449A1/zh
Priority to RU2017110875A priority patent/RU2669019C1/ru
Priority to CN201510561759.1A priority patent/CN105201799B/zh
Publication of WO2016037299A1 publication Critical patent/WO2016037299A1/zh
Priority to US15/453,915 priority patent/US10280720B2/en

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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
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/128—Adaptation of pump systems with down-hole electric drives
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating

Definitions

  • the invention relates to a submersible pumping unit, in particular to a submersible pumping unit with a downhole driving conversion device.
  • the present invention provides a submersible pumping unit with a downhole driving conversion device, which can convert the rotational power generated by the rotary submersible motor into a straight line through a downhole driving conversion device. Reciprocating power, without long sucker rods, can directly drive the pump in the well.
  • the submersible pumping unit with the downhole driving conversion device of the invention comprises a control cabinet having an automatic commutation function according to a set frequency, a downhole driving device connected with the control cabinet through a submersible cable, and a pump assembly provided, A pump for the plunger and the outlet; the downhole drive includes a rotary submersible motor with a protector located within the downhole casing, and a downhole drive conversion device disposed between the submersible motor and the pump.
  • the control cabinet with automatic commutation function according to the set frequency is connected to the rotary submersible motor through the submersible cable.
  • the downhole driving conversion device comprises a screw rod and a push-pull rod disposed in the casing of the conversion device, the inside of the push-pull rod is provided with a nut, the screw rod is disposed inside the nut and drives the movement of the nut; the inner wall of the casing of the downhole driving conversion device is provided with an axis To the slide, the push-pull rod can move axially in the slide; one end of the lead screw is connected with the motor shaft of the submersible motor, and one end of the push-pull rod is connected with the plunger of the oil pump.
  • the outer wall of the push-pull rod is formed with a protruding guide key that cooperates with the slide rail.
  • the push-pull rod and the plunger are connected by a first joint, and the lead screw and the motor shaft are connected by a second joint.
  • the converter housing is connected at one end to the pump assembly and at the other end to the submersible motor housing.
  • the internal cavity of the downhole drive conversion device is filled with lubricating oil.
  • the working principle of the invention is that the uphole control cabinet transmits the power source that is commutated according to the set frequency to the underground submersible oil motor through the submersible oil cable, and then converts the left and right rotation alternating power generated by the rotary submersible motor through the downhole driving conversion device. It is an axial linear reciprocating power suitable for the operation of the pump, so as long as the converter is placed between the motor and the pump, regardless of whether the pump is placed on the submersible motor or placed under the submersible motor, By placing the slide on the inner wall of the outer casing or the outer wall of the push-pull rod, the purpose of the rod-free operation of the oil pump can be achieved.
  • the submersible pumping unit with the downhole driving conversion device of the invention does not need a long rod transmission, so it can efficiently adapt to the multi-inflection point, high inclination, high lift and other well conditions which are not suitable for the long rod driving.
  • the invention adopts a rotary submersible motor as a power source, and the same outer diameter size can be larger than the linear submersible motor output power and high efficiency, so it can adapt to the demand of different oil wells for different heads and displacements.
  • the structure of the invention is stable, the manufacturing cost is low, and the operation reliability is high.
  • 1 is a longitudinal section of a submersible pump unit with a downhole drive conversion device of the present invention
  • control cabinet 2 submersible motor
  • first connector 8 second connector
  • the invention provides a submersible pumping unit capable of directly converting a rotary power generated by a rotary submersible motor into a linear reciprocating power through a downhole driving conversion device, and directly driving the oil pump in a well without a long sucker rod.
  • Fig. 1 is a longitudinal sectional view showing the structure of a submersible pump unit with a downhole drive conversion device according to the present invention.
  • the submersible pump unit with the downhole driving conversion device of the present invention comprises an uphole control cabinet 1 having an automatic commutation function according to a set frequency, and a downhole connected to the control cabinet 1 through the submersible cable 2
  • the drive device and the oil pump 4 connected to the downhole drive device.
  • the downhole drive unit includes a rotary submersible motor 2 located within the downhole casing, and a downhole drive conversion device 3 disposed between the submersible motor 2 and the pumping pump 4.
  • the submersible motor 2 includes a submersible motor casing 21 and a motor shaft 22 extending out of the submersible motor casing 21; the utility model has a protector for automatically achieving pressure balance inside and outside the tunnel of the downhole driving device, and can withstand the set axial thrust force.
  • the downhole drive conversion device 3 includes a lead screw 34 and a push-pull rod 35 disposed in the conversion device housing 32.
  • the push-pull rod 35 is internally provided with a nut 36 which is disposed inside the nut 36 and can drive the nut 36 to move.
  • An axial slide 33 is provided on the inner wall of the converter housing 32.
  • the outer wall of the push-pull rod 35 is formed with a protruding guide key 37 that cooperates with the above-described slide 33; the push-pull rod 35 is axially movable within the outer casing 32.
  • the lower end of the lead screw 34 is connected to the motor shaft 22 of the submersible motor 2 via the second joint 8, and the upper end of the push-pull rod 35 is connected to the plunger 42 of the oil pump 4 through the first joint 7.
  • the internal cavity of the downhole drive conversion device 3 is filled with the lubricating oil 31.
  • the oil pump 4 is provided with a pump cylinder assembly 41, a plunger 42 and a liquid outlet 43, and the liquid outlet 43 is connected to the oil pipe 5.
  • the upper end of the converter housing 32 is connected to the pump cylinder assembly 41, and the lower end is tightly coupled to the submersible motor housing 21.
  • the oil pump 4, the downhole drive conversion device 3 and the submersible motor 2 with the protector are generally connected by the oil pipe 5 on the through hole and suspended in the oil well casing to form a submersible rodless drive pumping well Lower unit.
  • the working process of the submersible pump unit with the downhole driving conversion device of the invention is as follows:
  • the operation of the submersible submersible pump unit is controlled by the control cabinet 1 on the well.
  • the frequency of the commutation is set according to the unit specifications and different well conditions.
  • the power is transmitted to the submersible motor 2 through the submersible cable 6.
  • the push-pull rod 35 is driven by the running screw 34, and since the guide key 37 is limited by the outer casing slide 33, it can only be axially linearly reciprocated together with the plunger 42 of the oil pump 4. This linear reciprocating power causes the pump to generate the function of lifting the well fluid, and the well fluid is lifted up to the well through the oil pipe 5.
  • the working principle of the invention is to convert the left and right rotation alternating power generated by the rotary submersible motor into an axial linear reciprocating power suitable for the operation of the oil pump by the downhole driving conversion device, so that the conversion device is placed in the motor and Between the oil pump, whether the oil pump is placed on the submersible motor or placed under the submersible motor, whether the slide is placed on the inner wall of the outer casing or the outer wall of the push-pull rod, the pump can be operated without the rod. purpose.
  • the submersible pumping unit with the downhole driving conversion device of the invention has the advantages of the high efficiency and energy saving effect because the prime mover and the driving device are directly linked with the oil pump in the well, and the main engine and the driving device are directly connected with the oil pump in the underground. And can adapt to many inflection points, large slope, high lift and other well conditions, the maintenance period is longer.
  • the invention adopts a rotary submersible motor with nearly one hundred years of operation experience, and has high operational reliability, high power, and the head and displacement can meet most well conditions.

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

Abstract

一种带井下驱动转换装置的潜没式抽油泵机组，包括控制柜（1），井下驱动装置和抽油泵（4）；井下驱动装置包括位于井下套管内的旋转式潜油电机（2）和井下驱动转换装置（3）；井下驱动转换装置（3）包括外壳（32）、丝杠（34）和推拉杆（35），推拉杆（35）内部设置有与丝杠（34）相配合的丝母（36）；转换装置外壳（32）内壁上设置有轴向的滑道（33），推拉杆（35）可在外壳内轴向往复移动；丝杠（34）的一端与潜油电机（2）的电机轴相连接，推拉杆（35）的一端与抽油泵（4）的柱塞（42）相连接；控制柜（1）为潜油电机（2）提供按设置频次换相的电源，井下驱动转换装置（3）将潜油电机（2）产生的左、右旋交变旋转动力转化为直线往复动力驱动抽油泵（4）运行。

Description

带井下驱动转换装置的潜没式抽油泵机组 技术领域
本发明涉及一种潜没式抽油泵机组，具体的说是涉及一种带井下驱动转换装置的潜没式抽油泵机组。
背景技术
以前，国内外各油田使用的主要采油设施之一是地面驱动的抽油泵机组，这种设施采用陆用驱动转换装置(常见的是游梁式抽油机，俗称叩头机)，它将陆用旋转式电动机产生的旋转动力转换为直线式往复动力，以适应井下抽油泵的直线往复运行方式。其结构尺寸基本不受空间限制，且在空气中运行环境适宜，因此结构坚固、简单，易于维修保养，百余年来始终占据诸多采油设施之首位。它的缺陷是必须依靠很长的抽油杆将地面驱动装置输出的直线往复动力传递到井下抽油泵，因此存在冲程损失大，机械效率低、能耗高，难以适应拐点多、斜度大、扬程高等井况条件，检修周期较短，井上占地面积较大，不易管理等缺点。
为此，近年来有人研究一种直线式潜油电机，可以输出直线往复动力，在井下直接驱动抽油泵，从而免去长抽油杆带来的缺陷；然而，这种电机位处油井套管内，受直径限制，功率较小，输出轴向力较小，只能适应低扬程、小排量的井况，故难以推广。
发明内容
本发明为了解决上述现有技术中的问题，提供了一种带井下驱动转换装置的潜没式抽油泵机组，可将旋转式潜油电机产生的旋转动力通过一种井下驱动转换装置转换为直线往复动力，不用长抽油杆，可在井下直接驱动抽油泵。
本发明为解决这一问题所采取的技术方案是：
本发明的带井下驱动转换装置的潜没式抽油泵机组，包括具有按设置频次实现自动换相功能的控制柜，通过潜油电缆与控制柜连接的井下驱动装置和设置有泵筒总成、柱塞和出液口的抽油泵；所述的井下驱动装置包括位于井下套管内的带保护器的旋转式潜油电机，以及设置在潜油电机和抽油泵之间的井下驱动转换装置。
具有按设置频次实现自动换相功能的控制柜通过潜油电缆与旋转式潜油电机相连接。
井下驱动转换装置包括设置在转换装置外壳内的丝杠和推拉杆，推拉杆内部设置有丝母，丝杠设置在丝母内部，并驱动丝母运动；井下驱动转换装置外壳内壁上设置有轴向的滑道，推拉杆在滑道内可以轴向移动；丝杠的一端与潜油电机的电机轴相连接，推拉杆的一端与抽油泵的柱塞相连接。
所述的推拉杆的外壁上形成有突起的与所述滑道相配合的导向键。
所述的推拉杆与柱塞通过第一接头连接，丝杠与电机轴通过第二接头连接。
所述的转换装置外壳一端与泵筒总成相连接，另一端与潜油电机外壳紧密连接。
所述的井下驱动转换装置的内部空腔充满润滑油。
本发明的工作原理是井上控制柜把按设置频次换相的电源通过潜油电缆传送到井下潜油电机，再通过井下驱动转换装置将旋转式潜油电机产生的左、右旋交变动力转换为适合于抽油泵运行的轴向直线往复动力，因此只要将此转换装置置于电动机与抽油泵之间，无论将抽油泵置于潜油电机之上或置于潜油电机之下，也无论将滑道置于外壳内壁或推拉杆外壁，都可以达到使抽油泵实现无杆运行的目的。
本发明具有的优点和积极效果是：
本发明的带井下驱动转换装置的潜没式抽油泵机组，无需长杆传动，因此能高效率的适应长杆驱动所不适应的多拐点、大斜度、高扬程等井况。本发明采用旋转式潜油电机为动力源，同样外径尺寸可以比直线式潜油电机输出功率大、效率高，因此能适应大部分油井对不同扬程、排量的需求。本发明的结构稳固，制造成本较低，运行可靠性较高。
附图说明
图1是本发明的带井下驱动转换装置的潜没式抽油泵机组的纵剖
结构示意图。
附图中主要部件符号说明：
1：控制柜            2：潜油电机
3：井下驱动转换装置  4：抽油泵
5：油管              6：潜油电缆
7：第一接头          8：第二接头
21：潜油电机外壳    22：电机轴
31：润滑油          32：转换装置外壳
33：滑道             34：丝杠
35：推拉杆           36：丝母
37：导向键           41：泵筒总成
42：柱塞             43：出液口
具体实施方式
以下参照附图及具体实施例对本发明的一种带井下驱动转换装置的潜没式抽油泵机组做进一步说明。下述各实施例仅用于说明本发明而并非对本发明的限制。
本发明提供了一种可将旋转式潜油电机产生的旋转动力通过井下驱动转换装置转换为直线往复动力，不用长抽油杆，可在井下直接驱动抽油泵的潜没式抽油泵机组。
图1是本发明的带井下驱动转换装置的潜没式抽油泵机组的纵剖结构示意图。如图1所示，本发明的带井下驱动转换装置的潜没式抽油泵机组，包括具有按设置频次实现自动换相功能的井上控制柜1，通过潜油电缆2与控制柜1连接的井下驱动装置和与井下驱动装置连接的抽油泵4。井下驱动装置包括位于井下套管内的旋转式潜油电机2，以及设置在潜油电机2和抽油泵4之间的井下驱动转换装置3。
潜油电机2包括潜油电机外壳21和伸出到潜油电机外壳21外的电机轴22；它带有保护器，可自动实现井下驱动装置腔内外压力平衡，并能承受设定轴向推拉力。井下驱动转换装置3包括设置在转换装置外壳32内的丝杠34和推拉杆35，推拉杆35内部设置有丝母36，丝杠34设置在丝母36内部，并可驱动丝母36运动。转换装置外壳32内壁上设置有轴向的滑道33。推拉杆35的外壁上形成有突起的导向键37，与上述的滑道33相配合；推拉杆35在外壳32内可轴向移动。丝杠34的下端与潜油电机2的电机轴22通过第二接头8相连接，推拉杆35的上端与所述抽油泵4的柱塞42通过第一接头7相连接。井下驱动转换装置3的内部空腔充满润滑油31。
抽油泵4设置有泵筒总成41、柱塞42和出液口43，出液口43与油管5连接。
转换装置外壳32上端与泵筒总成41连接，下端与潜油电机外壳21紧密连接。
抽油泵4、井下驱动转换装置3与带保护器的潜油电机2总体被直通井上的油管5连接悬吊于油井套管内，构成潜没式无杆驱动抽油泵井 下机组。
本发明的带井下驱动转换装置的潜没式抽油泵机组的工作过程如下：
井下潜没式抽油泵机组的运行由井上的控制柜1操控，根据机组规格和不同井况设置换相频次，接通后，电源通过潜油电缆6传送到井下的潜油电机2，潜油电机2的电机轴22连同井下驱动转换装置3的丝杠34，同时按设定的转速和设定的频次进行右、左交变旋向的旋转方式运行；此时，设置有丝母36的推拉杆35被运行的丝杠34驱动，并由于导向键37受外壳滑道33所限，只能连同抽油泵4的柱塞42进行轴向直线往复运动。此直线往复动力使抽油泵产生举升井液的功能，通过油管5将井液举升到井上。
本发明的工作原理是通过井下驱动转换装置将旋转式潜油电机产生的左、右旋交变动力转换为适合于抽油泵运行的轴向直线往复动力，因此只要将此转换装置置于电动机与抽油泵之间，无论将抽油泵置于潜油电机之上或置于潜油电机之下，也无论将滑道置于外壳内壁或推拉杆外壁，都可以达到使抽油泵实现无杆运行的目的。
本发明的带井下驱动转换装置的潜没式抽油泵机组，相对于地面驱动的抽油泵机组，由于原动机与驱动装置都在井下直接与抽油泵连动，无需长杆传动，高效节能效果明显，且能适应拐点多、斜度大、扬程高等井况，维修期较长。相对于直线式潜油电机驱动的抽油泵机组，本发明采用具有近百年运行经验的旋转式潜油电机，运行可靠性高、功率大，扬程、排量可以满足大部分井况需求。
以上所述仅是本发明的较佳实施例而已，并非对本发明做任何形式上的限制，虽然本发明已以较佳实施例公开如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案的范围内，当然会利用此揭示和技术内容做出些许更动或修饰成为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所做的任何简单修改、等同变化与修饰，均属于本发明技术方案的范围内。

Claims (6)

  1. 一种带井下驱动转换装置的潜没式抽油泵机组，包括具有按设置频次实现自动换相功能的控制柜(1)，通过潜油电缆(6)与控制柜连接的井下驱动装置和设置有柱塞(42)和出液口(43)的抽油泵(4)；出液口(43)与油管(5)连接，其特征在于：井下驱动装置包括位于井下套管内的旋转式潜油电机(2)，以及设置在潜油电机(2)和抽油泵(4)之间的井下驱动转换装置(3)。
  2. 根据权利要求1所述的带井下驱动转换装置的潜没式抽油泵机组，其特征在于：具有按设置频次实现自动换相功能的控制柜(1)通过潜油电缆(6)与旋转式潜油电机(2)相连接。
  3. 根据权利要求1或权利要求2所述的带井下驱动转换装置的潜没式抽油泵机组，其特征在于：井下驱动转换装置(3)包括设置在转换装置外壳(32)内的丝杠(34)和推拉杆(35)，推拉杆(35)内部设置有丝母(36)，丝杠(34)连接在丝母(36)内部，并驱动丝母(36)运行，使推拉杆(35)在转换装置外壳(32)内沿轴向移动；丝杠(34)与潜油电机(2)的电机轴(22)相连接，推拉杆(35)与抽油泵(4)的柱塞(42)相连接。
  4. 根据权利要求3所述的带井下驱动转换装置的潜没式抽油泵机组，其特征在于：转换装置外壳(32)内壁上设置有轴向的滑道(33)，推拉杆(35)的外壁上形成有与滑道相配合的的导向键(37)。
  5. 根据权利要求3所述的带井下驱动转换装置的潜没式抽油泵机组，其特征在于：转换装置外壳(32)的一端与泵筒总成(41)相连接，另一端与潜油电机外壳(21)紧密连接。
  6. 根据权利要求3所述的带井下驱动转换装置的潜没式抽油泵机组，其特征在于：井下驱动转换装置(3)的内部空腔充满润滑油(31)。
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