WO2019047867A1 - 一种流体分隔装置及井道结构 - Google Patents

一种流体分隔装置及井道结构 Download PDF

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Publication number
WO2019047867A1
WO2019047867A1 PCT/CN2018/104229 CN2018104229W WO2019047867A1 WO 2019047867 A1 WO2019047867 A1 WO 2019047867A1 CN 2018104229 W CN2018104229 W CN 2018104229W WO 2019047867 A1 WO2019047867 A1 WO 2019047867A1
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WO
WIPO (PCT)
Prior art keywords
shaft body
separation device
fluid separation
packing member
packing
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PCT/CN2018/104229
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English (en)
French (fr)
Inventor
刘瀚森
唐勇
张罡
李军民
张忠林
刘树飞
苏诗策
易诚雄
周华
谭宇茜
唐湉
刘向美珂
陈俊宏
周侗侗
刘士吉
Original Assignee
刘书豪
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Application filed by 刘书豪 filed Critical 刘书豪
Publication of WO2019047867A1 publication Critical patent/WO2019047867A1/zh

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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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means

Definitions

  • the invention relates to the technical field of natural gas exploitation, in particular to a fluid separation device and a hoistway structure.
  • a fluid separation device is provided in the related art.
  • a plurality of packing members are disposed around the periphery of the fluid separating device, and the packing members are always in contact with the inner wall of the hoistway under the action of the elastic member to form a seal.
  • the pressure generated by the gas below the fluid separation device causes the fluid separation device to ascend and discharge the fluid above the fluid separation device as the fluid separation device ascends to the wellhead.
  • the problem with such a fluid separation device is that once foreign matter such as grit, oil wax or iron filings enters between the packing member and the inner shaft body, the packing member will not be able to be retracted radially inward, thereby causing the fluid separation device to be easily caught.
  • the object of the present invention is to overcome the deficiencies of the prior art and to provide a fluid separation device capable of automatically discharging foreign matter between the packing member and the shaft body during movement along the hoistway, thereby preventing the packing member from being radially inward. The retraction occurs, thereby preventing the fluid separation device from getting stuck in the hoistway.
  • Another object of the present invention is to provide a hoistway structure including the above-described fluid separation device.
  • a fluid separation device comprising: a shaft body; a plurality of packing members disposed around the shaft body; and an elastic return member coupled between the shaft body and the packing member, wherein the packing member is An accommodation space is formed between the outer peripheral surfaces of the shaft, and the first through hole that communicates the receiving space with the outside is opened on the packing member; the packing member is selectively used under the action of an external force The air is contracted radially inwardly and reduces the volume of the accommodation space, or expands radially outwardly under the action of the elastic return member and increases the volume of the accommodation space.
  • the fluid separation device further includes a guiding member; a guiding hole is formed on an outer circumferential surface of the shaft body; one end of the guiding member is connected to the packing member, and the other end of the guiding member is The guide holes are slidably fitted.
  • the shaft body has a cavity; the cavity is in communication with the guiding hole; one end of the guiding member extends into the cavity; and the guiding member is located at one end of the cavity a seat portion for abutting against an inner wall of the cavity when the packing member is expanded radially outward to an extreme position.
  • the shaft body has a cavity; one end of the shaft body is provided with an opening that communicates the cavity with the outside; and an outer peripheral surface of the shaft body is provided with a communication between the cavity and the receiving space. Communication hole.
  • an outer curved surface of at least one end of the packing member is provided with an arc-shaped sealing groove, and an arc-shaped sealing portion adjacent to the sealing groove;
  • the sealing section is overlapped in the sealing groove of the adjacent packing member, and an inner curved surface of the curved sealing section is slidably in contact with a groove bottom surface of the sealing groove.
  • the fluid separation device further includes a sealing ring connected in one-to-one correspondence with the packing member; the sealing ring is sleeved on the shaft body, and the plurality of sealing rings are stacked; the sealing The area of the intermediate bore of the ring is greater than the cross-sectional area of the shaft body to enable the seal ring to move radially relative to the shaft body with the packing member to which it is coupled.
  • the inner peripheral wall of the intermediate hole is provided with two opposite arcuate walls; the diameter of the arcuate wall is the same as the diameter of the outer peripheral surface of the shaft; when the packing member is radially inwardly contracted to the limit In position, one of the curved walls conforms to the outer peripheral surface of the shaft; and when the packing expands radially outward to an extreme position, the other curved wall and the outer peripheral surface of the shaft fit.
  • the outer circumferential surface of the sealing ring is provided with at least two radially protruding packing sheets; the sealing sheets are opposite to the flow paths formed between the adjacent packing members.
  • the two ends of the shaft body are respectively provided with a first large diameter section and a second large diameter section which are radially convex; the outer circumference of the first large diameter section is provided with a first limit of the axial protrusion a second ring of the second large diameter section is provided with an axially protruding second limiting ring; the two ends of the packing member are respectively provided with a first flange and a second convex extending in the axial direction a first flange is located between the first limiting ring and an outer circumferential surface of the shaft body; the second flange is located at an outer circumferential surface of the second limiting ring and the shaft body between.
  • a hoistway structure comprising a hoistway and any one of the fluid separation devices described above; the fluid separation device being slidably disposed within the hoistway; the packing member being in contact with an inner surface of the hoistway.
  • the packing member reciprocates in the radial direction. Since the packing member is provided with a first through hole communicating with the receiving space and the outside, the gravel and the oil in the receiving space are arranged. Foreign matter such as wax or iron filings is pressed by the moving packing member, thereby forcing the foreign matter in the accommodating space to be discharged through the first through hole, thus avoiding the situation that the packing member cannot be retracted radially inward, thereby avoiding fluid separation. The device is stuck in the hoistway.
  • the hoistway structure provided by the embodiment of the present invention has the above-described fluid separation device, it also has the technical effect that the fluid separation device is not easily caught in the hoistway.
  • FIG. 1 is a schematic structural view of a hoistway structure according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing the external structure of a fluid separation device in an embodiment of the present invention.
  • FIG. 3 is a schematic view showing the internal structure of a fluid separation device in an embodiment of the present invention.
  • Figure 4 is a schematic view showing the structure of a seal ring in an embodiment of the present invention.
  • 010-fluid separating device 100-axis body; 101-guide hole; 102-cavity; 103-opening; 104-communication hole; 110-first large diameter section; 111-first limiting ring; - second largest diameter section; 121 - second limit ring; 200 - packer; 201 - first through hole; 210 - seal groove; 220 - arc seal section; 230 - flow path; 240 - first convex Edge; 250-second flange; 300-elastic reset member; 401-accommodating space; 500-guide member; 510-limit portion; 600-seal ring; 610-intermediate hole; 611-arc wall; Septum; 020-well structure; 700-well.
  • orientation or positional relationship of the terms “inside”, “outer”, “upper”, “lower” and the like is based on the orientation or positional relationship shown in the drawings, or The orientation or positional relationship that is conventionally placed when the product is used, or the orientation or positional relationship that is conventionally understood by those skilled in the art, is merely for the convenience of describing the present invention and simplifying the description, and does not indicate or imply the indicated device. Or the components must have a particular orientation, are constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
  • a hoistway structure 020 Referring to FIG. 1, a hoistway structure 020.
  • the hoistway structure 020 includes a hoistway 700 and a fluid separation device 010; the fluid separation device 010 is slidably disposed within the hoistway 700.
  • FIG. 2 is a schematic diagram of the external structure of the fluid separation device 010 provided in the embodiment.
  • FIG. 3 is a schematic diagram showing the internal structure of the fluid separation device 010 according to the embodiment.
  • the fluid separation device 010 includes a shaft body 100, a packing member 200, and an elastic return member 300.
  • a plurality of packers 200 are disposed about the shaft body 100, and the elastic return member 300 is coupled between the shaft body 100 and the packer 200.
  • the resilient return member 300 applies a radially outward resilient force to the packer 200.
  • the accommodating space 401 is formed between the packing member 200 and the outer peripheral surface of the shaft body 100.
  • the first through hole 201 that communicates with the accommodating space 401 and the outside is formed in the packing member 200.
  • the packing member 200 is always in contact with the inner wall of the hoistway 700 to separate the fluid above the fluid separation device 010 from the fluid separation device 010. open.
  • the packing member 200 is subjected to a radially inward force, and the packing member 200 compresses the elastic returning member 300 and moves radially inward so that the fluid separating device 010 can smoothly pass through the hoistway.
  • the inner wall of the 700 is uneven.
  • the packing member 200 is always in a state of constant radial movement.
  • the packing member 200 moves radially inward, the volume of the accommodating space 401 is reduced; when the packing member is When the 200 moves radially outward, the volume of the accommodation space 401 increases.
  • foreign matter such as grit, oil wax or iron filings in the hoistway 700 enters the accommodating space 401 through the first through hole 201.
  • the packing member 200 is moved radially inward, the volume of the accommodating space 401 is reduced, and the foreign matter in the accommodating space 401 is thereby extruded through the first through hole 201. Since the foreign matter in the accommodating space 401 can be discharged in real time, it is avoided that the packing member 200 cannot be retracted radially inward, thereby preventing the fluid separating device 010 from being caught in the hoistway 700.
  • the inner wall of the hoistway 700 is likely to adhere to the oil wax, and by the movement of the fluid partitioning device 010, the oil wax on the inner wall of the hoistway 700 can be scraped off without the packing member 200 being caught.
  • the packing member 200 scrapes off the oil wax on the inner wall of the hoistway 700, and the scraped oil wax enters the accommodating space 401 through the first through hole 201, along with the packing member 200.
  • the squeezing, the oil wax is discharged through the first through hole 201, and the discharged oil wax is discharged to the outside of the hoistway 700 along with the fluid in the hoistway 700. This can effectively avoid excessive accumulation of oil wax on the inner wall of the hoistway 700 and affect the fluid circulation in the hoistway 700.
  • the fluid separation device 010 further includes a guide member 500.
  • a guide hole 101 is formed in an outer circumferential surface of the shaft body 100.
  • One end of the guide member 500 is coupled to the packing member 200, and the other end of the guide member 500 is slidably engaged with the guide hole 101.
  • the guide member 500 has a cylindrical shape, and the guide hole 101 is a circular hole.
  • the shaft body 100 is provided with a cavity 102; the cavity 102 is in communication with the guiding hole 101; one end of the guiding member 500 extends into the cavity 102; and the guiding member 500 is located in the cavity
  • One end of 102 has a limiting portion 510.
  • the limiting portion 510 is a flange that projects radially outward from an end of the guide member 500 located in the cavity 102.
  • the packing member 200 is expanded outward in the radial direction to the extreme position, the limiting portion 510 abuts against the inner wall of the cavity 102. In this way, it is possible to prevent the case where the guide member 500 is completely separated from the guide hole 101 and the spacer 200 cannot be normally returned.
  • the operational reliability of the fluid separation device 010 is improved.
  • one end of the shaft body 100 is provided with an opening 103 connecting the cavity 102 to the outside; and the outer peripheral surface of the shaft body 100 is provided with communication between the communication cavity 102 and the receiving space 401. Hole 104.
  • the opening 103 is opened at the lower end of the shaft body 100.
  • the gap is referred to as a flow passage 230.
  • the fluid below the fluid separation device 010 will flow over the fluid separation device 010 through the flow channel 230, which causes the thrust of the fluid separation device 010 to be reduced, affecting the lifting capacity of the fluid separation device 010. .
  • the outer arc surface of the upper end of the packing member 200 is provided with a curved sealing groove 210, and an arcuate sealing portion 220 adjacent to the sealing groove 210;
  • the curved sealing section 220 overlaps the sealing groove 210 of the adjacent packing member 200, and the inner curved surface 221 of the curved sealing section 220 is slidably in contact with the groove bottom surface of the sealing groove 210.
  • the flow area of the upper end of the flow channel 230 can be greatly reduced, and even the upper end of the flow channel 230 can be closed, so that the fluid below the fluid partition device 010 during the ascending process of the fluid partition device 010 It is difficult to flow above the fluid separation device 010. In this way, the upward thrust received by the fluid separation device 010 can be effectively increased, and the lifting ability of the fluid separation device 010 can be improved.
  • the sealing groove 210 and the curved sealing segment 220 may be disposed at the lower end of the packing member 200, or the sealing groove 210 and the curved sealing portion may be disposed at the upper and lower ends of the packing member 200. 220.
  • FIG. 4 is a schematic structural view of the seal ring 600 in the embodiment.
  • the fluid partition device 010 further includes a one-to-one connection with the packer 200.
  • the sealing ring 600; the sealing ring 600 is sleeved on the shaft body 100, and the plurality of sealing rings 600 are stacked; the area of the intermediate hole 610 of the sealing ring 600 is larger than the cross-sectional area of the shaft body 100, so that the sealing ring 600 can be attached thereto.
  • the joined packer 200 moves radially relative to the shaft body 100.
  • the flow area of the lower end of the flow passage 230 is greatly reduced, so that the fluid below the fluid separation device 010 is more difficult to flow above the fluid separation device 010, thereby further increasing the upward thrust received by the fluid separation device 010. .
  • the inner peripheral wall of the intermediate hole 610 is provided with two opposite arcuate walls 611; the diameter of the curved wall 611 is the same as the diameter of the outer peripheral surface of the shaft body 100; when the packing member 200 is radially inward When contracting to the extreme position, one of the curved walls 611 abuts against the outer peripheral surface of the shaft body 100; when the packing member 200 is radially expanded outward to the extreme position, the other curved wall 611 is fitted to the outer peripheral surface of the shaft body 100. .
  • the sealing ability between the seal ring 600 and the shaft body 100 can be improved, so that the fluid below the fluid separation device 010 is more difficult to flow above the fluid separation device 010, thereby further improving the fluid separation.
  • the outer circumferential surface of the sealing ring 600 is provided with at least two radially protruding packing pieces 620; the sealing piece 620 is opposite to the flow path 230 formed between the adjacent packing pieces 200.
  • the flow area of the lower end of the flow passage 230 can be further reduced by the packing piece 620 such that the fluid below the fluid separation device 010 is more difficult to flow above the fluid separation device 010, thereby further increasing the upward thrust experienced by the fluid separation device 010.
  • the two ends of the shaft body 100 are respectively provided with a first large diameter section 110 and a second large diameter section 120 which are radially convex; the outer circumference of the first large diameter section 110 is disposed.
  • the first limiting ring 111 has an axially protruding shape; the outer peripheral edge of the second large diameter segment 120 is provided with an axially protruding second limiting ring 121; the two ends of the packing member 200 are respectively disposed to extend in the axial direction a first flange 240 and a second flange 250; the first flange 240 is located between the first limiting ring 111 and the outer circumferential surface of the shaft body 100; the second flange 250 is located at the second limiting ring 121 and the shaft body Between the outer perimeters of 100.
  • the fluid separation device 010 and the hoistway structure 020 provided in this embodiment avoid the situation that the packing member 200 cannot be retracted radially inward, thereby preventing the fluid separation device 010 from being caught in the hoistway 700.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Processing Of Solid Wastes (AREA)
  • Sealing Devices (AREA)

Abstract

一种流体分隔装置，包括：轴体（100），围绕轴体（100）布置的多个封隔件（200），连接在轴体（100）与封隔件（200）之间的弹性复位件（300），封隔件（200）与轴体（100）外周面之间形成容纳空间（401），封隔件（200）上开设有连通容纳空间（401）与外界的第一通孔（201）；封隔件（200）可选择性的用于在外力的作用下沿径向向内收缩并减小容纳空间（401）的体积，或在弹性复位件（300）的作用下沿径向向外扩张并增大容纳空间（401）的体积。此外，带有该流体分隔装置的井道结构被公开。该流体分隔装置及井道结构，避免了封隔件无法径向向内收回的情况发生，进而避免流体分隔装置卡在井道内。

Description

一种流体分隔装置及井道结构
相关申请的交叉引用
本申请要求于2017年9月6日提交中国专利局的申请号为ZL2017107942996、名称为“一种流体分隔装置及井道结构”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及天然气开采技术领域，尤其涉及一种流体分隔装置及井道结构。
背景技术
在天然气井开发过程中，当井内天然气产量低或液体较多时，天然气无法将大量液体举升至地面，这会在井底形成一定高度的积液，进而降低天然气井产能，甚至导致天然气井停喷。
相关技术中提供了一种流体分隔装置。流体分隔装置外围设置有多个封隔件，这些封隔件在弹性件的作用下始终与井道内壁接触，形成密封。这样流体分隔装置下方的气体所产生的压力带动流体分隔装置上行，并在流体分隔装置上行至井口时排出流体分隔装置上方的积液。这种流体分隔装置的问题在于，一旦砂砾、油蜡或铁屑等异物进 入封隔件与内部轴体之间，封隔件将无法径向向内收回，进而导致流体分隔装置极易卡在井道内。
发明内容
本发明的目的在于克服现有技术的不足，提供一种流体分隔装置，其能够在沿井道运动的过程中自动排出封隔件与轴体之间的异物，避免封隔件无法径向向内收回的情况发生，进而避免流体分隔装置卡在井道内。
本发明的另一个目的在于提供一种包括上述流体分隔装置的井道结构。
本发明的实施例通过以下技术方案实现：
流体分隔装置，包括：轴体；围绕所述轴体布置的多个封隔件；以及连接在所述轴体与所述封隔件之间的弹性复位件，其中，所述封隔件与所述轴体外周面之间形成容纳空间，所述封隔件上开设有连通所述容纳空间与外界的第一通孔；所述封隔件可选择性的用于在外力的作用下沿径向向内收缩并减小所述容纳空间的体积，或在所述弹性复位件的作用下沿径向向外扩张并增大所述容纳空间的体积。
进一步的，所述流体分隔装置还包括导向件；所述轴体的外周面上开设有导向孔；所述导向件的一端与所述封隔件连接，所述导向件的另一端与所述导向孔可滑动地配合。
进一步的，所述轴体内具备空腔；所述空腔与所述导向孔连通；所述导向件的一端伸入所述空腔内；所述导向件位于所述空腔内的一端具备限位部；所述限位部用于在所述封隔件沿径向向外扩张至极限位置时与所述空腔的内壁抵靠。
进一步的，所述轴体内具备空腔；所述轴体的一端开设有连通所述空腔与外界的开口；所述轴体的外周面上开设有连通所述空腔与所述容纳空间的沟通孔。
进一步的，沿所述轴体的轴线方向，所述封隔件的至少一端的外弧面设置有弧形的密封槽，以及与所述密封槽相邻的弧形密封段；所述弧形密封段搭接在相邻的所述封隔件的所述密封槽中，且所述弧形密封段的内弧面与所述密封槽的槽底面可滑动地接触。
进一步的，所述流体分隔装置还包括与所述封隔件一一对应的连接的密封环；所述密封环套设在所述轴体上，多个所述密封环层叠设置；所述密封环的中间孔的面积大于所述轴体的横截面积，以使所述密封环能够随与之连接的所述封隔件相对于所述轴体径向运动。
进一步的，所述中间孔的内周壁具备相对的两段弧形壁；所述弧形壁的直径与所述轴体外周面的直径相同；当所述封隔件径向向内收缩至极限位置时，其中一个所述弧形壁与所述轴体外周面贴合；当所述封隔件径向向外扩张至极限位置时，另一个所述弧形壁与所述轴体外周面贴合。
进一步的，所述密封环的外周面设置有至少两个径向凸出的封隔片；所述封隔片与相邻的所述封隔件之间形成的流道正对。
进一步的，所述轴体的两端分别设置有径向凸出的第一大直径段和第二大直径段；所述第一大直径段的外周缘设置有轴向凸出的第一限位环；所述第二大直径段的外周缘设置有轴向凸出的第二限位环；所述封隔件的两端分别设置有沿轴向延伸的第一凸缘和第二凸缘；所述第一凸缘位于所述第一限位环与所述轴体的外周面之间；所述第二凸缘位于所述第二限位环与所述轴体的外周面之间。
一种井道结构，包括井道以及上述任意一种流体分隔装置；所述流体分隔装置可滑动地设置在所述井道内；所述封隔件与所述井道的内表面接触。
本发明的技术方案至少具有如下优点和有益效果：
本发明实施例提供的述流体分隔装置在工作中，封隔件沿径向方向往复运动，由于封隔件上开设有连通容纳空间与外界的第一通孔，因此容纳空间内的砂砾、油蜡或铁屑等异物会被运动的封隔件挤压，从而迫使容纳空间内的异物通过第一通孔排出，如此避免了封隔件无法径向向内收回的情况发生，进而避免流体分隔装置卡在井道内。
本发明实施例提供的井道结构，由于具备上述的流体分隔装置，因此也具备流体分隔装置不易卡在井道内的技术效果。
附图说明
为了更清楚的说明本发明实施例的技术方案，下面对实施例中需要使用的附图作简单介绍。应当理解，以下附图仅示出了本发明的某些实施方式，不应被看作是对本发明范围的限制。对于本领域技术人员而言，在不付出创造性劳动的情况下，能够根据这些附图获得其他附图。
图1为本发明的实施例提供的井道结构的结构示意图；
图2为本发明的实施例中流体分隔装置的外部结构示意图；
图3为本发明的实施例中流体分隔装置的内部结构示意图；
图4为本发明的实施例中密封环的结构示意图。
图中：010-流体分隔装置；100-轴体；101-导向孔；102-空腔；103-开口；104-沟通孔；110-第一大直径段；111-第一限位环；120-第二大直径段；121-第二限位环；200-封隔件；201-第一通孔；210-密封槽；220-弧形密封段；230-流道；240-第一凸缘；250-第二凸缘；300-弹性复位件；401-容纳空间；500-导向件；510-限位部；600-密封环；610-中间孔；611-弧形壁；620-封隔片；020-井道结构；700-井道。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合附图，对本发明实施例中的技术方案进行清楚、完整的描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。
因此，以下对本发明的实施例的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的部分实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征和技术方案可以相互组合。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。
在本发明的描述中，需要说明的是，术语“内”、“外”、“上”、“下”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是该发明产品使用时惯常摆放的方位或位置关系，或者是本领域技术人员惯常理解的方位或位置关系，这类术语仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
术语“第一”、“第二”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
实施例1：
请参照图1，本实施例一种井道结构020.井道结构020包括井道700以及流体分隔装置010；流体分隔装置010可滑动地设置在井道700内。
请结合参照图2和图3，图2为本实施例提供的流体分隔装置010的外部结构示意图。图3为本实施例提供的流体分隔装置010的内部结构示意图。从图2和图3中可以看出，流体分隔装置010包括轴体100、封隔件200和弹性复位件300。
多个封隔件200围绕轴体100布置，弹性复位件300连接在轴体100与封隔件200之间。弹性复位件300对封隔件200施加径向向外的弹性力。封隔件200与轴体100外周面之间形成容纳空间401，封隔件200上开设有连通容纳空间401与外界的第一通孔201。
流体分隔装置010在井道700内运动的过程中，在弹性复位件300的作用下，封隔件200始终与井道700内壁接触，以将流体分隔装置010上方和流体分隔装置010下方的流体分隔开。当井道700内壁出现凹凸不平的情况时，封隔件200受到径向向内的力，封隔件200将弹性复位件300压缩并径向向内运动，以使流体分隔装置010能够顺利通过井道700内壁凹凸不平处。流体分隔装置010在井道700内运动的过程中，封隔件200始终处于不断径向运动的状态，当封隔件200径向向内运动时，容纳空间401的体积减小；当封隔件 200径向向外运动时，容纳空间401的体积增大。在流体分隔装置010运动过程中，井道700内的砂砾、油蜡或铁屑等异物通过第一通孔201进入容纳空间401中。当封隔件200径向向内运动时，容纳空间401的体积减小，进而将容纳空间401中的异物通过第一通孔201挤出去。由于容纳空间401中的异物能够被实时的排出，因此避免了封隔件200无法径向向内收回的情况发生，进而避免流体分隔装置010卡在井道700内。
井道700的内壁容易附着油蜡，通过流体分隔装置010的运动，能够在避免封隔件200被卡住的情况下，将井道700内壁的油蜡刮除。具体的，在流体分隔装置010运动过程中，封隔件200将井道700内壁的油蜡刮除，被刮掉的油蜡通过第一通孔201进入容纳空间401中，随着封隔件200的挤压，油蜡又通过第一通孔201排出，排出的油蜡随着井道700内的流体运动，进而被排出至井道700外。这样能够有效避免井道700内壁上油蜡过多聚集，影响井道700内的流体流通。
进一步的，请参照图3，在本实施例中，流体分隔装置010还包括导向件500。轴体100的外周面上开设有导向孔101。导向件500的一端与封隔件200连接，导向件500的另一端与导向孔101可滑动地配合。导向件500为圆柱状，导向孔101为圆孔。设置导向件500，能够使确保封隔件200只能进行径向运动，提高流体分隔装置010的工作可靠性。
进一步的，请参照图3，在本实施例中，轴体100内具备空腔102； 空腔102与导向孔101连通；导向件500的一端伸入空腔102内；导向件500位于空腔102内的一端具备限位部510。限位部510为由导向件500位于空腔102内的一端径向向外凸出的凸缘。当封隔件200沿径向向外扩张至极限位置时，限位部510与空腔102的内壁抵靠。这样，能够防止导向件500完全脱离导向孔101导致的封隔件200无法正常回位的情况发生。提高了流体分隔装置010的工作可靠性。
进一步的，请参照图3，在本实施例中，轴体100的一端开设有连通空腔102与外界的开口103；轴体100的外周面上开设有连通空腔102与容纳空间401的沟通孔104。具体的，开口103开设在轴体100的下端。当流体分隔装置010沿井道700下行时，流体通过开口103进入空腔102内，然后通过沟通孔104进入容纳空间401，对容纳空间401内的异物进行冲击。容纳空间401内的异物在流体冲击作用下，能够更加容易地通过第一通孔201排出，进一步提高了流体分隔装置010排出异物的能力。
请参照图2，从图2中可以看出，相邻的两个封隔件200之间不可避免的存在间隙，在本实施例中，该间隙被称为流道230。当流体分隔装置010上行过程中，流体分隔装置010下方的流体会通过流道230流动至流体分隔装置010上方，这导致流体分隔装置010受到的推力减小，影响流体分隔装置010的举升能力。为了提高流体分隔装置010的举升能力，在本实施例中，封隔件200的上端的外弧面设置有弧形的密封槽210，以及与密封槽210相邻的弧形密封段220；弧 形密封段220搭接在相邻的封隔件200的密封槽210中，且弧形密封段220的内弧面221与密封槽210的槽底面可滑动地接触。通过弧形密封段220与密封槽210的配合，能够大幅度降低流道230上端的流通面积，甚至将流道230上端封闭，进而使得流体分隔装置010上行过程中，流体分隔装置010下方的流体难以流动至流体分隔装置010上方。这样，能够有效提高流体分隔装置010受到的向上的推力，提高流体分隔装置010的举升能力。可以理解的，在其他实施方式中，也可以在封隔件200的下端设置密封槽210和弧形密封段220，或者在封隔件200的上下两端均设置密封槽210和弧形密封段220。
请参照图4，并结合图2和图3，图4为本实施例中密封环600的结构示意图,在本实施例中，流体分隔装置010还包括与封隔件200一一对应的连接的密封环600；密封环600套设在轴体100上，多个密封环600层叠设置；密封环600的中间孔610的面积大于轴体100的横截面积，以使密封环600能够随与之连接的封隔件200相对于轴体100径向运动。通过层叠设置的密封环600，够大幅度降低流道230下端的流通面积，使得流体分隔装置010下方的流体更加难以流动至流体分隔装置010上方，从而进一步提高流体分隔装置010受到的向上的推力。
进一步的，在本实施例中，中间孔610的内周壁具备相对的两段弧形壁611；弧形壁611的直径与轴体100外周面的直径相同；当封隔件200径向向内收缩至极限位置时，其中一个弧形壁611与轴体 100外周面贴合；当封隔件200径向向外扩张至极限位置时，另一个弧形壁611与轴体100外周面贴合。通过弧形壁611与轴体100的配合，能够提高密封环600与轴体100之间的密封能力，使得流体分隔装置010下方的流体更加难以流动至流体分隔装置010上方，从而进一步提高流体分隔装置010受到的向上的推力。
进一步的，密封环600的外周面设置有至少两个径向凸出的封隔片620；封隔片620与相邻的封隔件200之间形成的流道230正对。通过封隔片620能够进一步降低流道230下端的流通面积，使得流体分隔装置010下方的流体更加难以流动至流体分隔装置010上方，从而进一步提高流体分隔装置010受到的向上的推力。
请再次参照图3，在本实施例中，轴体100的两端分别设置有径向凸出的第一大直径段110和第二大直径段120；第一大直径段110的外周缘设置有轴向凸出的第一限位环111；第二大直径段120的外周缘设置有轴向凸出的第二限位环121；封隔件200的两端分别设置有沿轴向延伸的第一凸缘240和第二凸缘250；第一凸缘240位于第一限位环111与轴体100的外周面之间；第二凸缘250位于第二限位环121与轴体100的外周面之间。通过是上述结构，能够对封隔件200的径向运动起限位作用，提高了流体分隔装置010的工作可靠性。
综上所述，本实施例提供的流体分隔装置010和井道结构020，避免了封隔件200无法径向向内收回的情况发生，进而避免流体分隔装置010卡在井道700内。
以上所述仅为本发明的部分实施例而已，并不用于限制本发明，对于本领域技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 流体分隔装置(010)，其特征在于，包括：
    轴体(100)；
    围绕所述轴体(100)布置的多个封隔件(200)；以及
    连接在所述轴体(100)与所述封隔件(200)之间的弹性复位件(300)，
    其中，所述封隔件(200)与所述轴体(100)外周面之间形成容纳空间(401)，所述封隔件(200)上开设有连通所述容纳空间(401)与外界的第一通孔(201)；所述封隔件(200)可选择性的用于在外力的作用下沿径向向内收缩并减小所述容纳空间(401)的体积，或在所述弹性复位件(300)的作用下沿径向向外扩张并增大所述容纳空间(401)的体积。
  2. 根据权利要求1所述的流体分隔装置(010)，其特征在于：
    所述流体分隔装置(010)还包括导向件(500)；所述轴体(100)的外周面上开设有导向孔(101)；所述导向件(500)的一端与所述封隔件(200)连接，所述导向件(500)的另一端与所述导向孔(101)可滑动地配合。
  3. 根据权利要求2所述的流体分隔装置(010)，其特征在于：
    所述轴体(100)内具备空腔(102)；所述空腔(102)与所述导向孔(101)连通；所述导向件(500)的一端伸入所述空腔(102)内；所述导向件(500)位于所述空腔(102)内的一端具备限位部(510)；所述限位部(510)用于在所述封隔件(200)沿径向向外扩张至极限位置时与所述空腔(102)的内壁抵靠。
  4. 根据权利要求1所述的流体分隔装置(010)，其特征在于：
    所述轴体(100)内具备空腔(102)；所述轴体(100)的一端开设有连通所述空腔(102)与外界的开口(103)；所述轴体(100)的外周面上开设有连通所述空腔(102)与所述容纳空间(401)的沟通孔(104)。
  5. 根据权利要求1所述的流体分隔装置(010)，其特征在于：
    沿所述轴体(100)的轴线方向，所述封隔件(200)的至少一端的外弧面设置有弧形的密封槽(210)，以及与所述密封槽(210)相邻的弧形密封段(220)；
    所述弧形密封段(220)搭接在相邻的所述封隔件(200)的所述密封槽(210)中，且所述弧形密封段(220)的内弧面(221)与所述密封槽(210)的槽底面可滑动地接触。
  6. 根据权利要求1所述的流体分隔装置(010)，其特征在于：
    所述流体分隔装置(010)还包括与所述封隔件(200)一一对应 的连接的密封环(600)；所述密封环(600)套设在所述轴体(100)上，多个所述密封环(600)层叠设置；所述密封环(600)的中间孔(610)的面积大于所述轴体(100)的横截面积，以使所述密封环(600)能够随与之连接的所述封隔件(200)相对于所述轴体(100)径向运动。
  7. 根据权利要求6所述的流体分隔装置(010)，其特征在于：
    所述中间孔(610)的内周壁具备相对的两段弧形壁(611)；所述弧形壁(611)的直径与所述轴体(100)外周面的直径相同；当所述封隔件(200)径向向内收缩至极限位置时，其中一个所述弧形壁(611)与所述轴体(100)外周面贴合；当所述封隔件(200)径向向外扩张至极限位置时，另一个所述弧形壁(611)与所述轴体(100)外周面贴合。
  8. 根据权利要求6所述的流体分隔装置(010)，其特征在于：
    所述密封环(600)的外周面设置有至少两个径向凸出的封隔片(620)；所述封隔片(620)与相邻的所述封隔件(200)之间形成的流道(230)正对。
  9. 根据权利要求1所述的流体分隔装置(010)，其特征在于：
    所述轴体(100)的两端分别设置有径向凸出的第一大直径段(110)和第二大直径段(120)；所述第一大直径段(110)的外周缘设置有 轴向凸出的第一限位环(111)；所述第二大直径段(120)的外周缘设置有轴向凸出的第二限位环(121)；
    所述封隔件(200)的两端分别设置有沿轴向延伸的第一凸缘(240)和第二凸缘(250)；所述第一凸缘(240)位于所述第一限位环(111)与所述轴体(100)的外周面之间；所述第二凸缘(250)位于所述第二限位环(121)与所述轴体(100)的外周面之间。
  10. 一种井道结构(020)，其特征在于：
    所述井道结构(020)包括井道(700)以及权利要求1-9中任意一项所述的流体分隔装置(010)；所述流体分隔装置(010)可滑动地设置在所述井道(700)内；所述封隔件(200)与所述井道(700)的内表面接触。
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