CN109538168B - Fluid separation device and well structure - Google Patents
Fluid separation device and well structure Download PDFInfo
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- CN109538168B CN109538168B CN201811359981.3A CN201811359981A CN109538168B CN 109538168 B CN109538168 B CN 109538168B CN 201811359981 A CN201811359981 A CN 201811359981A CN 109538168 B CN109538168 B CN 109538168B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention relates to the technical field of natural gas or oil exploitation, and discloses a fluid separation device and a well structure. The fluid separation device provided by the invention is provided with the flow blocking ring, the inner surface of the packing part is provided with the accommodating groove, and the flow blocking ring is inserted into the accommodating groove. When the sealing part moves outwards along the radial direction under the action of the driving mechanism, the flow blocking ring can block the gap between the sealing part and the mandrel and has a blocking effect on liquid flowing between the sealing part and the mandrel. Therefore, the downward leakage amount of the accumulated liquid in the accumulated liquid lifting process is greatly reduced, the upward leakage amount of the fluid below the fluid separation device in the accumulated liquid lifting process is greatly reduced, the accumulated liquid lifting efficiency is improved, and the yield of the natural gas well or the petroleum is improved.
Description
Technical Field
The invention relates to the technical field of natural gas or oil exploitation, in particular to a fluid separation device and a well structure.
Background
In the development of gas or oil wells, it is necessary to lift the liquid charge at the bottom of the well to the surface in order to increase the production of gas or oil.
A fluid separation device is provided in the related art. And a plurality of sealing parts are arranged on the periphery of the mandrel of the fluid separation device, and the sealing parts are always in contact friction with the inner wall of the well under the action of the elastic part to form sealing. In the shut-in state, the fluid separation device descends to the bottom of the well. When a well is opened, the pressure generated by the fluid below the fluid separation device drives the fluid separation device to move upwards, the liquid above the fluid separation device is lifted by the fluid separation device, and accumulated liquid above the fluid separation device is discharged when the fluid separation device moves upwards to a well head.
A problem with such fluid separation devices is that gaps can develop between adjacent packings and between the packings and the mandrel as the packings expand radially outwardly under the influence of the resilient member. In the process of lifting the accumulated liquid, the accumulated liquid above the fluid separation device may flow downwards through the gap, and the fluid below the fluid separation device may flow upwards through the gap, so that great leakage is caused, and the accumulated liquid lifting efficiency is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a fluid separation device which can reduce the downward leakage amount of accumulated fluid in the process of lifting the accumulated fluid, can reduce the upward leakage amount of fluid below the fluid separation device in the process of lifting the accumulated fluid, and can improve the lifting efficiency of the accumulated fluid.
It is another object of the present invention to provide a well structure including the above-described fluid separation device.
The embodiment of the invention is realized by the following technical scheme:
a fluid separation apparatus for movement along a well in the well, the fluid separation apparatus comprising: a mandrel; the sealing parts are arranged around the mandrel, a fluid channel is formed between every two adjacent sealing parts, and the inner surfaces of the sealing parts are provided with accommodating grooves; the flow blocking ring is sleeved on the mandrel and inserted into the accommodating groove; and a drive mechanism for driving the packing member to move in a radial direction; wherein the flow area of the fluid passage increases when the closure is moved radially outward and decreases when the closure is moved radially inward.
Further, the fluid channel has a meandering extension.
Furthermore, the baffle ring is positioned at the bent part of the fluid channel.
Further, the flow blocking ring and the mandrel can be matched in an axially sliding mode.
Furthermore, a chip removal groove is formed in the inner surface of one side of the accommodating groove.
Furthermore, the outer surface of the sealing part is an arc surface, and the diameter of the outer surface of the sealing part is smaller than the inner diameter of the well.
Further, the outer surface of the packing has a diameter that is 3mm to 8mm smaller than the inner diameter of the well.
Further, the maximum diameter of the fluid separation means is D when the seals move radially outward to the limitMAXThe inner diameter of the well being D0；D0-2mm<DMAX<D0+2mm。
Further, D0-2mm<DMAX<D0。
A well structure comprising a well and any one of the above fluid separation devices; a fluid separation device is slidably disposed within the well.
The technical scheme of the invention at least has the following advantages and beneficial effects:
the fluid separation device provided by the embodiment of the invention is provided with the flow blocking ring, the inner surface of the packing part is provided with the accommodating groove, and the flow blocking ring is inserted into the accommodating groove. When the sealing part generates a gap with the mandrel due to radial movement, the flow blocking ring can block the gap between the sealing part and the mandrel and block fluid flowing between the sealing part and the mandrel. So, greatly reduced lift hydrops in-process hydrops volume that leaks out downwards, greatly reduced lift hydrops in-process fluid separator below fluid volume that leaks out upwards, improved hydrops lift efficiency, and then help the promotion of natural gas well or oil well output.
The shaft structure provided by the embodiment of the invention has the technical effects that the downward leakage amount of the accumulated liquid is small in the process of lifting the accumulated liquid and the upward leakage amount of the fluid below the fluid separation device is small due to the fluid separation device.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings needed to be used in the embodiment are briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. From these figures, other figures can be derived by those skilled in the art without inventive effort.
Fig. 1 is an axial cross-sectional structural schematic diagram of a hoistway structure provided by an embodiment of the invention;
FIG. 2 is a schematic perspective view of a fluid separation device according to an embodiment of the present invention in an expanded state;
FIG. 3 is a schematic perspective view of a fluid separation apparatus according to an embodiment of the present invention in a contracted state;
FIG. 4 is a schematic view of a radial cross-section configuration of a fluid separation apparatus in an expanded state provided by an embodiment of the present invention;
FIG. 5 is a schematic view of a radial cross-section of a fluid separation apparatus in a contracted state according to an embodiment of the present invention;
FIG. 6 is a schematic perspective view of a packing member of a fluid separation apparatus according to an embodiment of the present invention;
fig. 7 is an enlarged view of fig. 4 at a.
In the figure: 010-a fluid separation means; 100-mandrel; 110-a fixed through hole; 120-a first locating hole; 200-a seal; 201-a fluid channel; 201 a-first fluid channel; 201 b-a second fluid channel; 201 c-a third fluid passage; 202-accommodating grooves; 203-chip grooves; 210-a threaded hole; 220-a second positioning hole; 300-a flow blocking ring; 400-a drive mechanism; 500-pin; 510-a threaded section; 520-a connecting segment; 530-a limiting section; 610-a first plug; 620-second plug; 020-hoistway structure; 900-well.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.
Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments of the present invention and the features and technical solutions thereof may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and such terms are used for convenience of description and simplification of the description, and do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The terms "first," "second," or "third," etc. are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Example 1:
fig. 1 is a schematic axial cross-sectional structure diagram of a hoistway structure 020 according to this embodiment. Referring to fig. 1, in the present embodiment, a well structure 020 includes a fluid separation device 010 and a well 900. A fluid isolation device 010 is slidably disposed in the well 900 and is movable along the well 900. In the present embodiment, a natural gas well is described as an example, and in the present embodiment, the hoistway 900 is a hoistway of a natural gas well. In a gas well shut-in condition, fluid isolation device 010 is lowered to the bottom of the well. After the fluid separation device 010 descends to the bottom of the well, the natural gas well is opened, and under the action of the thrust of fluid below the natural gas well, the fluid separation device 010 ascends to lift the accumulated fluid above the fluid separation device upwards and discharge the accumulated fluid through the wellhead.
The fluid separation device 010 will be further described below.
Fig. 2 is a schematic perspective view of the fluid separation device 010 in an expanded state according to this embodiment. Fig. 3 is a schematic perspective view of the fluid separation device 010 in a contracted state according to this embodiment. Fig. 4 is a schematic view of a radial cross-section structure of the fluid separation device 010 in an expanded state according to this embodiment. Fig. 5 is a schematic view of a radial cross-section structure of the fluid separation device 010 in a contracted state according to this embodiment. Fig. 7 is an enlarged view of fig. 4 at a.
Referring to fig. 2, 3, 4, 5 and 7, the fluid separation apparatus 010 of the present embodiment includes a mandrel 100, a packing 200, a baffle ring 300, a driving mechanism 400, a pin 500, a first plug 610 and a second plug 620.
The mandrel 100 is cylindrical, and the first plug 610 and the second plug 620 are respectively in threaded connection with two ends of the mandrel 100. Four enclosures 200 are arranged around the mandrel 100. Both the inner and outer surfaces of the enclosure 200 are radiused. Two threaded holes 210 are formed in the packing member 200 at intervals in the axial direction. The spindle 100 is provided with fixing through holes 110 corresponding to the screw holes 210 one to one. The pin 500 comprises a threaded section 510, a connecting section 520 and a limiting section 530 which are connected in sequence. The pin 500 penetrates through the fixing through hole 110 on the mandrel 100, the threaded section 510 and the threaded hole 210 are in threaded connection, and the limiting section 530 is located in the mandrel 100. The diameter of the limiting section 530 is larger than that of the fixing through hole 110, so that the enclosure 200 is positioned and the enclosure 200 is prevented from falling. In order to make the structure of the fluid separation device 010 more reliable, the threaded section 510 may be welded to the threaded hole 210, so as to further reduce the possibility of the packing 200 falling.
A second positioning hole 220 is formed on the inner surface of the sealing member 200. In the present embodiment, two second positioning holes 220 are opened on the inner surface of the enclosure 200, and the two second positioning holes 220 are located between the two threaded holes 210. The outer circumferential surface of the mandrel 100 is provided with first positioning holes 120 corresponding to the second positioning holes 220 one to one. The driving mechanism 400 is disposed between the enclosure 200 and the mandrel 100, and both ends of the driving mechanism 400 are received in the first positioning hole 120 and the second positioning hole 220, respectively. In this embodiment, the driving mechanism 400 is a spring. The drive mechanism 400 applies a radially outward elastic restoring force to the enclosure 200, causing the enclosure 200 to move radially outward. When the stop segment 530 abuts the mandrel 100, the septum 200 moves radially outward to a limit position with the fluid separation device 010 in an expanded state (fig. 2 and 4). When the enclosure 200 is externally compressed, the enclosure 200 overcomes the elastic restoring force of the driving mechanism 400 and moves radially inward. When the inner surface of the septum 200 abuts the outer surface of the mandrel 100, the septum 200 moves radially inward to an extreme position with the fluid separation device 010 in a contracted state (fig. 3 and 5). It should be noted that, in other embodiments, when the driving mechanism 400 is a spring, the driving mechanism 400 may be sleeved on the connecting section 520 and located between the limiting section 530 and the inner surface of the mandrel 100. In other embodiments, the drive mechanism 400 may not be a spring, for example, the drive mechanism 400 may be a motor that moves the enclosure 200 in a radial direction.
Fig. 5 is a schematic perspective view of a sealing member 200 in the fluid separation device 010 according to this embodiment. Please refer to fig. 4, fig. 5 and fig. 6 in combination. In the present embodiment, the inner surface of the enclosure 200 is formed with a receiving groove 202. The flow blocking ring 300 is sleeved on the mandrel 100, and the flow blocking ring 300 is inserted into the receiving groove 202. It should be noted that the width of the receiving groove 202 is slightly greater than the thickness of the baffle ring 300 to allow the packing 200 to move radially freely. When the packings 200 are moved radially outward, the flow area of the fluid passage 201 formed between the adjacent packings 200 is increased while a gap is created between the inner surface of the packings 200 and the outer circumferential surface of the mandrel 100, and fluid can flow from one end to the other end of the fluid separation device 010 through the fluid passage 201 and the gap between the packings 200 and the mandrel 100. In the present embodiment, since the flow blocking ring 300 is provided, the fluid flowing in the fluid passage 201 and the gap between the packing 200 and the mandrel 100 can be blocked, and the fluid throughput can be greatly reduced. The fluid separation device 010 of this embodiment is configured to lift the accumulated fluid in the natural gas well, and the accumulated fluid flows downward through the fluid channel 201. After entering the fluid channel 201, the liquid may enter the gap between the septum 200 and the mandrel 100 and flow downward through the gap between the septum 200 and the mandrel 100. Due to the arrangement of the flow blocking ring 300, in the process that the accumulated liquid flows downwards, the flow blocking ring 300 can block the accumulated liquid flowing downwards, the downward leakage amount of the accumulated liquid in the process of lifting the accumulated liquid is greatly reduced, the accumulated liquid lifting efficiency is improved, and the yield of the natural gas well is improved. In another case, the fluid under the fluid separation device 010 flows upwards through the fluid channel 201, and after entering the fluid channel 201, the fluid enters the gap between the enclosure 200 and the mandrel 100 and flows upwards through the gap between the enclosure 200 and the mandrel 100, so that the upward thrust applied to the fluid separation device 010 is reduced, and the effusion lifting efficiency is reduced. Due to the flow blocking ring 300, in the process that fluid below the fluid separation device 010 flows upwards, the flow blocking ring 300 can block the accumulated fluid flowing upwards, the upward leakage amount of the fluid in the process of lifting the accumulated fluid is greatly reduced, the accumulated fluid lifting efficiency is improved, and further the yield of the natural gas well is improved.
Further, in the present embodiment, the receiving groove 202 is opened between the two second positioning holes 220, and the receiving groove 202 is located in the middle of the enclosure 200 along the axial direction. The two second positioning holes 220 are symmetrical with respect to the receiving groove 202, and the two threaded holes 210 are symmetrical with respect to the receiving groove 202.
The baffle ring 300 may be fixedly connected to the mandrel 100, or may be axially slidably engaged with the mandrel 100. In the present embodiment, the flow blocking ring 300 and the mandrel 100 are axially slidably engaged, which provides the following advantages:
in addition to radial movement, the enclosure 200 inevitably undergoes axial displacement during operation. If the baffle ring 300 is fixedly connected to the mandrel 100, the sidewall of the receiving groove 202 is easily collided with the baffle ring 300 violently when the packing member 200 is axially displaced, which may cause deformation of the baffle ring 300. The deformed baffle ring 300 tends to impede radial movement of the packing 200. In order to avoid deformation of the baffle ring 300, the thickness of the baffle ring 300 may be increased, but this may increase the width of the receiving groove 202, thereby reducing the fluid blocking capability. In order to avoid the side wall of the receiving groove 202 from colliding with the baffle ring 300, the width of the receiving groove 202 may be increased, but this also results in a decrease in the fluid blocking capability. In the embodiment, the flow blocking ring 300 is slidably fitted to the mandrel 100 in the axial direction, when the packing member 200 is displaced in the axial direction, the flow blocking ring 300 contacts with one side wall of the receiving groove 202 and moves along with the axial direction of the packing member 200, which avoids severe collision between the flow blocking ring 300 and the side wall of the receiving groove 202, eliminates the risk of deformation of the flow blocking ring 300, enables the thickness of the flow blocking ring 300 to be kept small, and simultaneously enables the width of the receiving groove 202 to be correspondingly reduced, thereby facilitating improvement of the blocking capability for fluid. Further, due to the axially slidable fit of the baffle ring 300 and the mandrel 100, the baffle ring 300 is always tightly attached to one side surface of the receiving groove 202 by the axial movement of the packing member 200 or the thrust of the fluid, so as to form a seal, thereby greatly increasing the fluid blocking capability.
Further, in the present embodiment, a chip groove 203 is opened on an inner surface of one side of the receiving groove 202. The junk slots 203 have two openings, one on the inside surface of one side of the receiving groove 202 and the other on the inside surface of the enclosure 200. Since the width of the receiving groove 202 is only slightly larger than the baffle ring 300, when foreign objects enter the receiving groove 202, the foreign objects are easily caught between the receiving groove 202 and the baffle ring 300, which may cause the packing member 200 to move radially and may even cause the packing member 200 to be stuck. To avoid this problem, a chip groove 203 is provided on one side inner surface of the accommodation groove 202, so that foreign matter entering the accommodation groove 202 can be discharged out of the accommodation groove 202 through the chip groove 203.
Further, in the present embodiment, the fluid passage 201 formed between the adjacent enclosures 200 has a bent extended locus. The bent portion of the fluid channel 201 can increase the flow resistance of the fluid, thereby further increasing the fluid blocking capability. In the present embodiment, the baffle ring 300 is located at the bend of the fluid channel 201, which can reduce the flow area of the bend of the fluid channel 201, thereby improving the fluid blocking capability.
Further, in the present embodiment, the fluid passage 201 includes a first fluid passage 201a, a second fluid passage 201b, and a third fluid passage 201c connected in sequence; the first fluid passage 201a and the third fluid passage 201c each extend in the axial direction; the second fluid channel 201b is perpendicular to the first fluid channel 201 a; the baffle ring 300 is at least partially located within the second fluid passage 201 b.
In order to reduce the effusion leakage amount during the lifting of the effusion, the traditional fluid separation device sets the outer surface of the packing part into an arc surface, and the diameter of the outer surface of the packing part is equal to the inner diameter of the well. Thus, the outer surface of the packing member is brought into surface contact with the inner surface of the well by the elastic member, thereby forming a large sealing surface. Thus, although the amount of fluid loss can be reduced, the following two problems are also caused:
1. the outer surface of the packer is in contact with the inner surface of the well and the friction is high and it takes a long time for the fluid separation device to go down to the bottom of the well. The well needs to be shut in during the descent of the fluid separation device. The long run down time of the fluid separator results in long shut in times which reduces the production time of the gas well.
2. Because the wellhead is closed during the descending process of the fluid separation device, the accumulated liquid in the well can gradually flow back to the stratum along with the time. The longer the shut-in time, the more fluid returns to the formation. This results in less liquid accumulation above the fluid separation device as it travels downhole, and less liquid accumulation is carried over once the fluid separation device is lifted.
To overcome the above two problems, in the present embodiment, the outer surface of the packing 200 is provided as a circular arc surface, and the diameter of the outer surface of the packing 200 is smaller than the inner diameter of the hoistway 900. Because the outer surface of the packing 200 has a smaller diameter than the inner diameter of the well 900, only line contact is made between the outer surface of the packing 200 and the inner surface of the well 900, greatly reducing the friction between the fluid isolation device 010 and the well 900, allowing the fluid isolation device 010 to descend quickly within the well 900. It should be noted that if the diameter of the outer surface of the enclosure 200 is too small, this may result in excessive leakage between the outer surface of the enclosure 200 and the inner surface of the well 900, which may affect the lifting capacity of the fluid isolation device 010. To this end, in this embodiment, the diameter of the outer surface of the packing 200 is defined to be 3mm to 8mm smaller than the inner diameter of the well 900 to avoid excessive leakages between the outer surface of the packing 200 and the inner surface of the well 900.
In this embodiment, the maximum diameter of the fluid isolation device 010 is D when the enclosure 200 is moved radially outward to the limit by the drive mechanism 400MAX(in mm). The inner diameter of the well 900 is D0(in mm). D0-2mm<DMAX<D0+2 mm. Preferably, D0-2mm<DMAX<D0. Thus, in the descending process of the fluid separation device 010, the friction part between the fluid separation device 010 and the well 900 is reduced, so that the fluid separation device 010 can descend in the well quickly.
Because the descending speed of the fluid separation device 010 is increased, the fluid separation device 010 can descend to the bottom of the well in a short time, the well closing time is greatly reduced, and the effective production time of the natural gas well is prolonged. In addition, the shut-in time is reduced, so that the amount of accumulated liquid flowing back to the stratum is reduced, when the fluid separation device 010 descends to the bottom of the well, a large amount of accumulated liquid is positioned above the fluid separation device 010, and the amount of accumulated liquid brought out by the fluid separation device 010 in one-time lifting is greatly increased.
The diameter of the outer surface of the packing 200 is set to be 3mm to 8mm smaller than the inner diameter of the hoistway 900, D0-2mm<DMAX<D0The fluid loss between the fluid isolation device 010 and the well 900 is increased when the liquid is lifted, but the fluid isolation device 010 provided by the embodiment is provided with the baffle ring 300, so that the fluid loss between the sealing part 200 and the mandrel 100 is greatly reduced, and the increased fluid loss between the fluid isolation device 010 and the standard well is compensated. Therefore, the total leakage of the fluid separation device 010 when lifting the accumulated liquid is not increased or even reduced.
To sum up, the well structure 020 and the fluid separation device 010 that this embodiment provided, fluid separation device 010 can descend to the bottom of well 900 fast in the course of the work, has reduced the shut-in time, has reduced the volume that the hydrops flows back to the stratum, simultaneously because fluid separation device 010 is provided with the fender stream ring 300, greatly reduced the fluid leakage volume between packing part 200 and dabber 100 for the hydrops volume greatly increased that fluid separation device 010 lifted once and carried out has great help to improving natural gas production.
The above description is only a partial example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A fluid isolation device (010) for movement along a well (900) in the well (900), the fluid isolation device (010) comprising:
a mandrel (100);
a plurality of packing parts (200) arranged around the mandrel (100), wherein a fluid channel (201) is formed between the adjacent packing parts (200), and the inner surface of each packing part (200) is provided with a containing groove (202);
the flow blocking ring (300) is sleeved on the mandrel (100), and the flow blocking ring (300) is inserted into the accommodating groove (202); and
a drive mechanism (400) for moving the enclosure (200) in a radial direction;
wherein the flow area of the fluid passage (201) increases when the enclosure (300) moves radially outward and decreases when the enclosure (300) moves radially inward;
the outer surface of the packing member (200) is an arc surface, and the diameter of the outer surface of the packing member (200) is smaller than the inner diameter of the well (900).
2. The fluid separation device (010) of claim 1, characterized in that:
the fluid channel (201) has a meandering course.
3. The fluid separation device (010) of claim 2, characterized in that:
the flow blocking ring (300) is positioned at the bent part of the fluid channel (201).
4. The fluid separation device (010) of claim 1, characterized in that:
the flow blocking ring (300) is matched with the mandrel (100) in an axially sliding mode.
5. The fluid separation device (010) of claim 1, characterized in that:
a chip groove (203) is formed in the inner surface of one side of the accommodating groove (202).
6. The fluid separation device (010) of claim 1, characterized in that:
the diameter of the outer surface of the packing (200) is 3mm to 8mm smaller than the inner diameter of the well (900).
7. Fluid separation device (010) according to any of claims 1-5, characterized in that:
the maximum diameter of the fluid separation means (010) being D when the closure (300) is moved radially outwards to the limitMAXThe inner diameter of the well (900) is D0；
D0-2mm<DMAX< D0+2mm。
8. The fluid separation device (010) of claim 7, characterized in that:
D0-2mm<DMAX< D0。
9. a hoistway structure (020), characterized by:
the well structure (020) comprising a well (900) and the fluid separation device (010) of any one of claims 1-8; the fluid isolation device (010) is slidably disposed within the hoistway (900).
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| US4320800A (en) * | 1979-12-14 | 1982-03-23 | Schlumberger Technology Corporation | Inflatable packer drill stem testing system |
| CN103726813A (en) * | 2014-01-13 | 2014-04-16 | 安东柏林石油科技（北京）有限公司 | Well completion structure and method for building packer in packing ring outside oil gas well filter tubing string |
| CN106194309A (en) * | 2015-05-27 | 2016-12-07 | 爱信精机株式会社 | Stream separation structure and control valve for fluids |
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