CN213775335U - Underground gas-liquid separation lifting device - Google Patents
Underground gas-liquid separation lifting device Download PDFInfo
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- CN213775335U CN213775335U CN202022443108.1U CN202022443108U CN213775335U CN 213775335 U CN213775335 U CN 213775335U CN 202022443108 U CN202022443108 U CN 202022443108U CN 213775335 U CN213775335 U CN 213775335U
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Abstract
The utility model discloses an underground gas-liquid separation lifting device, which 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. 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 utility model belongs to the technical field of the oil development technique and specifically relates to a gas-liquid separation lifting devices in pit.
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. From overall structure, this utility model and current rod-type pump oil production pipe's difference only change the passageway that punches for the oil pipe lateral wall from original oil pipe lower part for the inlet channel, therefore formed the space that gravity subsided gas-liquid separation. Is fundamentally different from this patent.
Patent CN201911136601.4 discloses an oil well is oil gas separator in pit, stratum fluid is earlier behind the cyclone oil gas separator, the liquid and the gas of initial gross separation go upward respectively at two passageways, liquid gets into oil gas separation tubular column inner tube back side direction discharge, and form stable liquid level at the inner tube, gaseous entering oil gas separation tubular column outer tube, outer tube and the annular UNICOM of sleeve pipe, the casing is pressed, the sleeve pipe liquid column, the annular liquid column density of oil gas separation, it reaches approximate balance to dissolve the gas ratio, and then reduce the precipitation by the gaseous of separating 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 the 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 a word, above technical scheme of the disclosure and the technical problem that will solve and the beneficial effect who produces all with the utility model discloses inequality, perhaps technical field or application are different, are directed against the utility model discloses more technical problem and the beneficial effect that will solve, above all there is not technological inspiration in the technical document of disclosing.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an underground gas-liquid separation lifting device aiming at the defects in the prior art, the gas-liquid separation lifting device and an oil well pump are integrated, 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 above purpose, the utility model 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 an oil pipe string.
Compared with the prior art, the utility model following beneficial effect has:
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 view of an underground gas-liquid separation and lifting device of the present invention.
In the figure: 1-stratum fluid inlet channel, 2-oil sleeve annulus, 3-sedimentation space, 4-fluid pump inlet 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-floating valve and 95-leather cup.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to 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 settling 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 just can reach better torrent separation effect, and subsides space 3 needs the big passageway just can reach better effect of subsiding, in actual production design process, only needs to reduce the diameter of urceolus 91 just can reach above two purposes simultaneously to the internal diameter of urceolus 91 reduces the back, more helps going into of whole tubular column, reduces and goes 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 utility model relates to a gas-liquid separation lifting devices in pit. 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 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.
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 embodiments with more components are only the preferred embodiments, and the embodiments with fewer components are the basic embodiments, but the basic objects of the present invention can also be achieved, so all of these modified embodiments are within the scope of the present 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 application, the term "plurality" means two or more unless expressly 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, 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 (7)
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 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.
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| CN202022443108.1U CN213775335U (en) | 2020-10-28 | 2020-10-28 | Underground gas-liquid separation lifting device |
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