CN114508324A - Underground gas-liquid separation lifting device and method - Google Patents
Underground gas-liquid separation lifting device and method Download PDFInfo
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- CN114508324A CN114508324A CN202011176093.5A CN202011176093A CN114508324A CN 114508324 A CN114508324 A CN 114508324A CN 202011176093 A CN202011176093 A CN 202011176093A CN 114508324 A CN114508324 A CN 114508324A
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- 239000007788 liquid Substances 0.000 title claims abstract description 115
- 238000000926 separation method Methods 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 72
- 230000000694 effects Effects 0.000 claims abstract description 25
- 230000005484 gravity Effects 0.000 claims abstract description 21
- 230000015572 biosynthetic process Effects 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 7
- 238000012938 design process Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 2
- 239000003129 oil well Substances 0.000 abstract description 13
- 239000003921 oil Substances 0.000 description 30
- 239000000243 solution Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
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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
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
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- 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
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Abstract
The invention discloses an underground gas-liquid separation lifting device and method, comprising an outer cylinder, a pump cylinder, a plunger and a packer; the outer cylinder is sleeved outside the pump cylinder, a first annular space is formed between the inner wall of the outer cylinder and the outer wall of the pump cylinder, a second annular space is formed between the outer wall of the outer cylinder and the inner wall of the sleeve, and the upper end of the first annular space is communicated with the second annular space; the packer is connected to the lower end of the outer barrel and is set on the inner wall of the sleeve, namely the packer seals the lower port of the second annular space; the plunger piston axially runs in the pump barrel, the pump barrel and the outer barrel are simultaneously connected with a radial gap bridge channel, the gap bridge channel is used as a fluid pump inlet channel, the inner end of the gap bridge channel is communicated with the bottom end opening of the pump barrel, the outer end of the gap bridge channel is communicated with the second annular space, and the bottom end opening of the pump barrel can only be communicated with the bottom end of the second annular space through the gap bridge channel. The gas-liquid separation device and the oil well pump are of an integrated structure, so that the reliability is high; turbulent flow separation and gravity separation are combined, so that the separation effect is good; good separation effect can be obtained without increasing the outer diameter of the whole device, and the process of running the tubular column into the well is smoother.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to an underground gas-liquid separation lifting device and method.
Background
In the process of lifting underground fluid by a sucker rod pump, the well with high gas-liquid ratio has the condition of low pump efficiency due to the influence of gas, and even generates the gas lock phenomenon. Therefore, separating the gas as far as possible before the liquid enters the pump helps to improve the efficiency of the sucker rod pump lift system.
The traditional underground gas-liquid separation tool is a gas anchor, is connected below a pump by adopting a cyclone separation or gravity separation principle, and is two parts which are mutually independent with an oil well pump. Because the gas anchor submergence degree is deeper than the oil-well pump submergence degree, therefore the gas that separates is difficult to slip out from liquid completely under the liquid column pressure effect, leads to the separation effect poor.
Patent CN201811204386.2 discloses an oil pumping device for downhole oil-gas separation. This patent has opened the inlet on the oil pipe wall, and the annular space that goes up back from the oil jacket annular space and get into oil pipe and rod-type pump from the inlet and continue the downstream from the output liquid, and at downstream in-process gas-liquid separation, gas is discharged from the inlet, and liquid continues to get into in the pump downwards. The exhaust passage of this patent and the inlet channel of stratum production liquid are same passageway, and gas-liquid mixture gets into when the upstroke promptly, and gas is followed this passageway and is gone upward and spills over during the downstroke, because the up-and-down stroke is reciprocal in turn, consequently can lead to the gas separation effect not good enough. Compared with the prior rod pump oil production pipe, the invention has the difference that the liquid inlet channel is changed from the lower part of the original oil pipe into the channel with holes on the side wall of the oil pipe, thereby forming a space for gravity settling gas-liquid separation. Is fundamentally different from this patent.
Patent CN201911136601.4 discloses an oil well is oil gas separator in pit and method, stratum fluid is earlier behind cyclone separation oil and gas separator, the liquid and the gas of initial gross separation go upward respectively at two passageways, liquid lateral discharge behind the entering oil gas separation tubular column inner tube, and form stable liquid level at the inner tube, gas gets into oil gas separation tubular column outer tube, outer tube and sleeve pipe annular space UNICOM, the casing is pressed, the sleeve pipe liquid column, the annular liquid column density of oil gas separation annular space, it reaches approximate balance to dissolve the gas ratio, and then reduce the precipitation of the gaseous of being separated out, a small amount of gas still can be precipitated to the liquid in the oil gas separation tubular column inner tube, extract through the gas-liquid pump, thereby reduce free gas and precipitate. The gas-liquid separation function of the casing string is realized by a cyclone separation device under the pump, the casing string and the oil well pump are mutually independent components, and the other main means for reducing gas separation is to inhibit gas from entering the pump through pressure balance, so that the structure of the casing string is essentially different from that of the casing string.
Publication (bulletin) No.: CN109723409A, publication (public notice) day: 2019-05-07 discloses an underground gas-liquid separation lifting process pipe column which comprises a liquid production sleeve, an underground safety valve, a packing liquid passing device, a gas production oil pipe seating joint, a gas production oil pipe, a cable passing packer, a liquid production oil pipe seating joint, a speed gas production oil pipe, a Y joint, an insertion seal, a working barrel, a regulating and controlling cable, a gas circuit adjusting device, a power cable, an electric pump, a pump working condition, a gas-liquid separator and a top packer which are arranged in the production sleeve. The gas-phase and liquid-phase independent flow channels are established, so that the secondary liquid accumulation risk of the gas channel and the lifting inhibition effect of the liquid channel fluid on the gas channel fluid are effectively avoided, and the safety packing devices are arranged on the three established independent flow channels, so that the safety of offshore production operation can be ensured; the method has the characteristics of convenient operation and construction, high working stability, large liquid treatment amount and gas treatment amount and the like, and can be widely applied to the lifting process of offshore oil field oil wells with high gas-liquid ratio and liquid wells with large water yield.
Publication (bulletin) No.: CN202467788U, publication (public notice) day: 2012-10-03 presents a complex lift system for an oil well for lifting crude oil in the oil well, the complex lift system for the oil well comprising: an oil pipe; the electric submersible pump, the packer, the check valve and the at least one gas lift valve are sequentially connected in series on the oil pipe from bottom to top; the electric submersible pump, the packer, the check valve and the at least one gas lift valve each have a crude oil lifting passage in communication with the tubing. The method is characterized in that an electric submersible pump is adopted to carry out gas-lift combined type lifting, a packer and a check valve are arranged between the electric submersible pump and a bottom gas-lift valve, a gas-liquid separator is arranged below the electric submersible pump through annular gas lift, a guide pipe is connected to the gas-liquid separator, separated gas is guided into an oil pipe on the electric submersible pump to assist the gas lift, annular gas injection has no direct influence on a liquid level, the lower electric submersible pump and the like, and the requirement of large-displacement lifting of a deep oil well can be met.
Publication (bulletin) No.: CN209212217U, publication (public notice) day: 2019-08-06 relates to a self-gas lift device capable of separating gas and liquid, which comprises: fluid inlet, filter screen, gas outlet, baffle, gas-liquid separation room, fluid outlet, liquid outlet. The method is characterized in that: the filter screen is detachable; gas and liquid lifted from the gas well are filtered by a filter screen and then enter a gas-liquid separation chamber through a fluid inlet; the horizontal cross-sectional area of the gas-liquid separation chamber is gradually increased from top to bottom, so that the flow velocity of gas-liquid fluid entering the chamber is reduced, gas exists in the form of bubbles, and the gas floats upwards due to the fact that the floating speed of the gas is greater than the downward flow velocity of the liquid phase; meanwhile, the whole flow velocity is reduced, so that small bubbles can be fully escaped, and gas-liquid separation is realized. And the gas obtained after separation flows out from the gas outlet and enters the annular inlet through the intermediate pipeline, so as to enter the well bottom and realize self gas lift. Has the following beneficial effects: the gas-liquid fluid of the well can be directly separated, no additional equipment is needed, the self-gas lift is realized, the cost is low, and the popularization is convenient.
In summary, the technical solutions of the above-disclosed technologies, the technical problems to be solved, and the advantageous effects thereof are all different from the present invention, or the technical fields or the application occasions are different, and no technical inspiration exists in the above-disclosed technical documents for more technical features, technical problems to be solved, and advantageous effects thereof.
Disclosure of Invention
The invention aims to provide an underground gas-liquid separation lifting device and method aiming at the defects in the prior art, the gas-liquid separation lifting device and an oil well pump are of an integrated structure, and the reliability is high; turbulent flow separation and gravity separation are combined, so that the separation effect is good; good separation effect can be obtained without increasing the outer diameter of the whole device, and the process of running the tubular column into the well is smoother.
In order to achieve the purpose, the invention adopts the following technical scheme:
an underground gas-liquid separation lifting device comprises an outer cylinder, a pump cylinder, a plunger and a packer;
the outer cylinder is sleeved outside the pump cylinder, a first annular space is formed between the inner wall of the outer cylinder and the outer wall of the pump cylinder, a second annular space is formed between the outer wall of the outer cylinder and the inner wall of the sleeve, and the upper end of the first annular space is communicated with the second annular space;
the packer is connected to the lower end of the outer barrel and is set on the inner wall of the sleeve, namely the packer seals the lower port of the second annular space;
the plunger piston axially runs in the pump barrel, the pump barrel and the outer barrel are simultaneously connected with a radial gap bridge channel, the gap bridge channel is used as a fluid pump inlet channel, the inner end of the gap bridge channel is communicated with the bottom end opening of the pump barrel, the outer end of the gap bridge channel is communicated with the second annular space, and the bottom end opening of the pump barrel can only be communicated with the bottom end of the second annular space through the gap bridge channel.
Further, the packer is a cup.
Further, a fixed valve is installed at the bottom end opening of the pump cylinder.
Furthermore, the plunger is a hollow plunger, and a traveling valve is installed at a lower port of the plunger.
Further, the first annular space serves as a formation fluid inlet channel, namely a turbulent flow separation channel, and the second annular space serves as a settling space, namely a gravity separation channel;
and a formation fluid discharge channel is formed in the upper end of the first annular space, namely the upper end of the first annular space is communicated with the second annular space through the formation fluid discharge channel.
Further, the radial distance from the outer wall of the pump barrel to the inner wall of the outer barrel is smaller than the radial distance from the outer wall of the outer barrel to the inner wall of the sleeve.
Furthermore, the upper end of the plunger is connected with a sucker rod string, and the upper end of the pump barrel is connected with a tubing string.
In order to achieve the purpose, the invention adopts the following technical scheme:
the use method of the underground gas-liquid separation lifting device comprises the following steps:
during the upstroke, namely when the plunger moves upwards, formation fluid enters the gas-liquid separation lifting device from the formation fluid inlet channel, and because the formation fluid inlet channel is narrow, a gas-liquid mixture is easy to form turbulent flow in the channel, and small bubbles are easy to mix to form large bubbles to form turbulent flow separation;
the gas-liquid mixture continues to ascend to a stratum fluid discharge channel, bubbles continue to ascend to a working fluid level after passing through the stratum fluid discharge channel, the bubbles are discharged from the working fluid level and enter an oil sleeve annulus, liquid descends in a settling space due to the action of gravity, the space is large, liquid flow is stable, and gas-liquid gravity separation is facilitated;
during the lower stroke, the separation efficiency is higher, because the liquid flow in the settling space does not flow or move, the liquid flow is more stable, and the gas-liquid gravity separation effect is better;
during the next upstroke, liquid in the lower part of the settling space enters the fixed valve along the fluid inlet pump channel, then enters the pump barrel, then enters the plunger through the traveling valve, and is gradually lifted to the ground along with continuous suction.
Further, the method comprises the following steps:
stratum fluid inlet channel needs narrow passageway just can reach better torrent separation effect, and the settlement space needs the big passageway just can reach better settlement effect, in actual production design process, only needs to reduce the diameter of urceolus just can reach above two purposes simultaneously to the internal diameter of urceolus reduces the back, more helps going into of whole tubular column, reduces and goes into the in-process and meets the card probability.
Further, the method comprises the following steps:
in order to improve the separation effect, the lengths of the stratum fluid inlet channel and the settling space need to be prolonged, and the separation effect is realized by prolonging the length of the outer barrel and moving the position of the stratum fluid discharge channel upwards; the lengths of the stratum fluid liquid inlet channel and the settling space of the gas-liquid separation lifting device can be adjusted randomly between 1m and 500m according to requirements.
Compared with the prior art, the invention has the following beneficial effects:
the gas-liquid separation device and the oil well pump are of an integrated structure, so that the reliability is high; turbulent flow separation and gravity separation are combined, so that the separation effect is good; good separation effect can be obtained without increasing the outer diameter of the whole device, and the process of running the tubular column into the well is smoother.
The stratum produced liquid goes upward along the liquid inlet channel, turbulence is formed in the channel, the separated gas escapes from the fluid discharge channel, the liquid enters a settling space formed by the exterior of the device and the sleeve for gravity separation, the liquid goes downward in the settling space, and the gas goes upward until the gas escapes from the driven liquid level and enters the oil sleeve annulus; the fluid pump inlet channel is arranged at the bottom of the settling space, fluid after turbulent flow separation and gravity separation enters the pump, the gas content is obviously reduced, and the lifting efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of a downhole gas-liquid separation and lift device.
In the figure: 1-stratum fluid inlet channel, 2-oil sleeve annulus, 3-sedimentation space, 4-fluid inlet pump channel, 5-stratum fluid discharge channel, 6-tubing string, 7-sucker rod string, 8-working fluid level, 9-gas-liquid separation lifting device, 91-outer cylinder, 92-pump cylinder, 93-fixed valve, 94-traveling valve and 95-cup.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example 1:
referring to fig. 1, the present invention provides a technical solution:
a downhole gas-liquid separation lifting device comprises an outer cylinder 91, a pump cylinder 92, a plunger and a packer;
the outer cylinder is sleeved outside the pump cylinder, a first annular space is formed between the inner wall of the outer cylinder and the outer wall of the pump cylinder, a second annular space is formed between the outer wall of the outer cylinder and the inner wall of the sleeve, and the upper end of the first annular space is communicated with the second annular space;
the packer is connected to the lower end of the outer barrel and is set on the inner wall of the sleeve, namely the packer seals the lower port of the second annular space;
the plunger piston axially runs in the pump barrel, the pump barrel and the outer barrel are simultaneously connected with a radial gap bridge channel, the gap bridge channel is used as a fluid pump inlet channel 4, the inner end of the gap bridge channel is communicated with the bottom end opening of the pump barrel, the outer end of the gap bridge channel is communicated with the second annular space, and the bottom end opening of the pump barrel can only be communicated with the bottom end of the second annular space through the gap bridge channel.
Further, the packer is a cup 95.
Further, a fixed valve 93 is installed at the bottom port of the pump cylinder.
Further, the plunger is a hollow plunger, and a traveling valve 94 is installed at a lower port of the plunger.
Further, the first annular space serves as a formation fluid inlet channel 1, namely a turbulent flow separation channel, and the second annular space serves as a settling space 3, namely a gravity separation channel;
and the upper end of the first annular space is provided with a formation fluid discharge channel 5, namely the upper end of the first annular space is communicated with the second annular space through the formation fluid discharge channel 5.
Further, the radial distance from the outer wall of the pump barrel to the inner wall of the outer barrel is smaller than the radial distance from the outer wall of the outer barrel to the inner wall of the sleeve.
Furthermore, the upper end of the plunger is connected with a sucker rod string 7, and the upper end of the pump barrel is connected with an oil pipe string 6.
The outer cylinder 91 and the pump cylinder 92 are connected by screw threads; the number of the traveling valves 94 can be designed to be 1-2; the gas-liquid separation lifting device 9 is connected with the oil pipe column 6 by threads; the formation fluid inlet passage 1 is an annular space formed by the outer cylinder 91 and the pump cylinder 92; the sedimentation space 3 is an annular space consisting of an outer cylinder 91, a sleeve and a leather cup 95; the formation fluid discharge passage 5 and the fluid intake pump passage 4 are both open holes in the outer cylinder 91.
During operation, the oil pipe 6 with the gas-liquid separation lifting device 9 is lowered to a preset position below the working fluid level 8, the leather cup 95 is sealed on the inner wall of the casing pipe, the sucker rod string 7 is lowered to be connected with the gas-liquid separation lifting device 9, and the lowering process is completed.
During the upstroke, the formation fluid enters the gas-liquid separation and lifting device 9 from the formation fluid inlet channel 1, and because the formation fluid inlet channel 1 is narrow, the gas-liquid mixture is easy to form turbulence in the channel, and small bubbles are easy to mix to form large bubbles; the gas-liquid mixture continues to ascend to the formation fluid discharge channel 5, bubbles pass through the formation fluid discharge channel 5 and then continue to ascend until being discharged from the driven liquid level 8 to enter the oil sleeve annulus 2, and the turbulent gas-liquid separation process is completed; the liquid descends in the settling space 3 due to the action of gravity, the space is large, liquid flow is stable, gas-liquid gravity separation is facilitated, separation efficiency is high in the downward stroke, and gas-liquid gravity separation is further completed. On the next upstroke, liquid in the lower part of the settling space 3 enters the fixed valve 93 along the fluid intake channel 4 and is gradually lifted to the surface with continued suction.
Stratum fluid inlet channel 1 needs narrow passageway could reach better torrent separation effect, and the settlement space 3 needs the major channel could reach better settlement effect, in the actual production design process, only needs to reduce the diameter of urceolus 91 just can reach two above purposes simultaneously to the internal diameter of urceolus 91 reduces the back, more helps going into of whole tubular column, reduces to go into the in-process and meets the card probability.
To improve the separation effect, it is necessary to extend the length of the formation fluid inlet channel 1 and the settling space 3, and this can be achieved by extending the length of the outer cylinder 91 and moving the position of the formation fluid discharge channel 5 upwards. Theoretically, referring to the maximum submergence degree of a general oil well pump of 500m, the lengths of the formation fluid inlet channel 1 and the settling space 3 of the gas-liquid separation lifting device 9 can be randomly adjusted between 1m and 500m according to requirements.
The invention relates to an underground gas-liquid separation lifting device. The stratum produced liquid goes upward along the liquid inlet channel, turbulence is formed in the channel, the separated gas escapes from the fluid discharge channel, the liquid enters a settling space formed by the exterior of the device and the sleeve for gravity separation, the liquid goes downward in the settling space, and the gas goes upward until the gas escapes from the driven liquid level and enters the oil sleeve annulus; the fluid pump inlet channel is arranged at the bottom of the settling space, fluid after turbulent flow separation and gravity separation enters the pump, the gas content is obviously reduced, and the lifting efficiency is improved.
Example 2:
referring to fig. 1, the present invention provides a technical solution:
a downhole gas-liquid separation lifting device is characterized by comprising an outer cylinder 91, a pump cylinder 92, a plunger and a packer;
the outer cylinder is sleeved outside the pump cylinder, a first annular space is formed between the inner wall of the outer cylinder and the outer wall of the pump cylinder, a second annular space is formed between the outer wall of the outer cylinder and the inner wall of the sleeve, and the upper end of the first annular space is communicated with the second annular space;
the packer is connected to the lower end of the outer barrel and is set on the inner wall of the sleeve, namely the packer seals the lower port of the second annular space;
the plunger piston axially runs in the pump barrel, the pump barrel and the outer barrel are simultaneously connected with a radial gap bridge channel, the gap bridge channel is used as a fluid pump inlet channel 4, the inner end of the gap bridge channel is communicated with the bottom end opening of the pump barrel, the outer end of the gap bridge channel is communicated with the second annular space, and the bottom end opening of the pump barrel can only be communicated with the bottom end of the second annular space through the gap bridge channel.
Further, the packer is a cup 95.
Further, a fixed valve 93 is installed at the bottom port of the pump cylinder.
Further, the plunger is a hollow plunger, and a traveling valve 94 is installed at a lower port of the plunger.
Example 3:
referring to fig. 1, the present invention provides a technical solution:
a downhole gas-liquid separation lifting device is characterized by comprising an outer cylinder 91, a pump cylinder 92, a plunger and a packer;
the outer barrel is sleeved outside the pump barrel, a first annular space is formed between the inner wall of the outer barrel and the outer wall of the pump barrel, a second annular space is formed between the outer wall of the outer barrel and the inner wall of the sleeve, and the upper end of the first annular space is communicated with the second annular space;
the packer is connected to the lower end of the outer barrel and is set on the inner wall of the sleeve, namely the packer seals the lower port of the second annular space;
the plunger piston axially runs in the pump barrel, the pump barrel and the outer barrel are simultaneously connected with a radial gap bridge channel, the gap bridge channel is used as a fluid pump inlet channel 4, the inner end of the gap bridge channel is communicated with the bottom end opening of the pump barrel, the outer end of the gap bridge channel is communicated with the second annular space, and the bottom end opening of the pump barrel can only be communicated with the bottom end of the second annular space through the gap bridge channel.
Although fig. 1 is used for all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as the parts or structural features missing in the embodiments are removed from the drawing. As will be clear to the skilled person. Of course, the embodiment with more components is only the best embodiment, and the embodiment with less components is the basic embodiment, but the basic object of the invention can also be achieved, so all the modified embodiments are within the protection scope of the invention.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made 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 (10)
1. A downhole gas-liquid separation lifting device is characterized by comprising an outer cylinder, a pump cylinder, a plunger and a packer;
the outer cylinder is sleeved outside the pump cylinder, a first annular space is formed between the inner wall of the outer cylinder and the outer wall of the pump cylinder, a second annular space is formed between the outer wall of the outer cylinder and the inner wall of the sleeve, and the upper end of the first annular space is communicated with the second annular space;
the packer is connected to the lower end of the outer barrel and is set on the inner wall of the sleeve, namely the packer seals the lower port of the second annular space;
the plunger piston axially runs in the pump barrel, the pump barrel and the outer barrel are simultaneously connected with a radial gap bridge channel, the gap bridge channel is used as a fluid pump inlet channel, the inner end of the gap bridge channel is communicated with the bottom end opening of the pump barrel, the outer end of the gap bridge channel is communicated with the second annular space, and the bottom end opening of the pump barrel can only be communicated with the bottom end part of the second annular space through the gap bridge channel.
2. The downhole gas-liquid separation lifting device of claim 1, wherein the packer is a cup.
3. The downhole gas-liquid separation lifting device of claim 2, wherein the bottom port of the pump cylinder is provided with a fixed valve.
4. A downhole gas-liquid separation lifting device according to claim 2 or 3, wherein the plunger is a hollow plunger, and a traveling valve is mounted at a lower port of the plunger.
5. A downhole gas-liquid separating and lifting device according to claim 2 or 3, wherein the first annular space is used as a formation fluid inlet channel, namely a turbulent flow separating channel, and the second annular space is used as a settling space, namely a gravity separating channel;
and a formation fluid discharge channel is formed in the upper end of the first annular space, namely the upper end of the first annular space is communicated with the second annular space through the formation fluid discharge channel.
6. A downhole gas-liquid separating and lifting device according to claim 2 or 3, wherein the radial distance from the outer wall of the pump barrel to the inner wall of the outer barrel is smaller than the radial distance from the outer wall of the outer barrel to the inner wall of the casing.
7. The downhole gas-liquid separating and lifting device of claim 2 or 3, wherein the upper end of the plunger is connected with a sucker rod string, and the upper end of the pump barrel is connected with a tubing string.
8. The use method of the underground gas-liquid separation and lifting device is characterized by comprising the following steps of:
during the upstroke, namely when the plunger moves upwards, formation fluid enters the gas-liquid separation lifting device from the formation fluid inlet channel, and because the formation fluid inlet channel is narrow, a gas-liquid mixture is easy to form turbulent flow in the channel, and small bubbles are easy to mix to form large bubbles to form turbulent flow separation;
the gas-liquid mixture continues to ascend to a stratum fluid discharge channel, bubbles continue to ascend to a working fluid level after passing through the stratum fluid discharge channel, the bubbles are discharged from the working fluid level and enter an oil sleeve annulus, liquid descends in a settling space due to the action of gravity, the space is large, liquid flow is stable, and gas-liquid gravity separation is facilitated;
during the lower stroke, the separation efficiency is higher, because the liquid flow in the settling space does not flow or move, the liquid flow is more stable, and the gas-liquid gravity separation effect is better;
on the next upstroke, liquid in the lower part of the settling space enters the fixed valve along the fluid inlet pump channel, then enters the pump barrel, then enters the plunger through the traveling valve, and is gradually lifted to the ground along with continuous suction.
9. The use method of the underground gas-liquid separation and lifting device according to claim 8, characterized by comprising the following steps:
stratum fluid inlet channel needs narrow passageway just can reach better torrent separation effect, and the settlement space needs the big passageway just can reach better settlement effect, in actual production design process, only needs to reduce the diameter of urceolus just can reach above two purposes simultaneously to the internal diameter of urceolus reduces the back, more helps going into of whole tubular column, reduces and goes into the in-process and meets the card probability.
10. The use method of the underground gas-liquid separation and lifting device according to claim 8, characterized by comprising the following steps:
in order to improve the separation effect, the lengths of the stratum fluid inlet channel and the settling space need to be prolonged, and the separation effect is realized by prolonging the length of the outer barrel and moving the position of the stratum fluid discharge channel upwards; the lengths of the stratum fluid inlet channel and the settling space of the gas-liquid separation lifting device can be adjusted randomly between 1m and 500m according to requirements.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991723A (en) * | 2022-06-16 | 2022-09-02 | 西南石油大学 | Gas lift system based on oil and gas exploitation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160138380A1 (en) * | 2013-02-14 | 2016-05-19 | James N. McCoy | Gas Separator with Inlet Tail Pipe |
| CN210623045U (en) * | 2019-04-03 | 2020-05-26 | 中国石油化工股份有限公司 | Hollow rod separate-production separate-discharge oil pump lifting device |
| CN213775335U (en) * | 2020-10-28 | 2021-07-23 | 中国石油化工股份有限公司 | Underground gas-liquid separation lifting device |
-
2020
- 2020-10-28 CN CN202011176093.5A patent/CN114508324A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160138380A1 (en) * | 2013-02-14 | 2016-05-19 | James N. McCoy | Gas Separator with Inlet Tail Pipe |
| CN210623045U (en) * | 2019-04-03 | 2020-05-26 | 中国石油化工股份有限公司 | Hollow rod separate-production separate-discharge oil pump lifting device |
| CN213775335U (en) * | 2020-10-28 | 2021-07-23 | 中国石油化工股份有限公司 | Underground gas-liquid separation lifting device |
Non-Patent Citations (1)
| Title |
|---|
| 雷雨田;佘梅卿;屈玉成;申秀丽;鲁献春;昝恒毅;: "高油气比油藏有杆泵抽油技术的研究与应用", 石油地质与工程, no. 04, 25 July 2006 (2006-07-25) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991723A (en) * | 2022-06-16 | 2022-09-02 | 西南石油大学 | Gas lift system based on oil and gas exploitation |
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