Gas-liquid separation device and oil production device

Abstract

The present application provides a gas-liquid separation device and an oil production device, and relates to the technical field of oilfield development. The gas-liquid separation device comprises a shell, a partition is arranged in the shell, the partition divides the shell into a primary separation chamber and a secondary separation chamber, and the partition has a first through hole; a suction pipe is arranged in the shell, and the two ends of the suction pipe are respectively located in the primary separation chamber and the secondary separation chamber; the primary separation chamber has an inlet, and the inlet is used to introduce a gas-liquid mixture, a primary separation device is arranged in the primary separation chamber, and a first exhaust hole is arranged on the side wall of the primary separation chamber; the secondary separation chamber has an outlet, a secondary separation device is arranged in the secondary separation chamber, and a second exhaust hole is arranged on the side wall of the secondary separation chamber. The above technical scheme improves the gas-liquid separation effect by performing primary separation of the gas-liquid mixture in the primary separation chamber and secondary separation of the gas-liquid mixture in the secondary classification chamber.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield development, and in particular to a gas-liquid separation device and an oil production device. Background Art

[0002] Carbon dioxide oil recovery refers to the technology of injecting carbon dioxide into oil layers to increase the recovery rate of oil fields. Under the conditions of appropriate pressure, temperature and crude oil components, carbon dioxide and crude oil are miscible, promoting crude oil expansion and reducing crude oil viscosity, thereby increasing crude oil fluidity and improving recovery rates.

[0003] A large amount of carbon dioxide is dissolved in the produced fluid produced after carbon dioxide oil recovery, and as the amount of carbon dioxide injected increases, the proportion of carbon dioxide in the produced fluid increases significantly. Too much carbon dioxide in the produced fluid affects the oil recovery efficiency and aggravates the corrosion of back-end equipment. Currently, gas-liquid separation is usually carried out by gravity separation or inertial separation.

[0004] However, the gas-liquid separation effect of the above method is limited. Summary of the invention

[0005] The present application provides a gas-liquid separation device and an oil production device, which are used to improve the gas-liquid separation effect in produced fluid.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] In one aspect, the present application provides a gas-liquid separation device, comprising:

[0008] A shell, wherein a partition is disposed in the shell, the partition separates the shell into a primary separation chamber and a secondary separation chamber, and the partition has a first through hole;

[0009] A suction pipe is arranged in the shell, and two ends of the suction pipe are respectively located in the primary separation chamber and the secondary separation chamber;

[0010] The primary separation chamber has an inlet for introducing a gas-liquid mixture, a primary separation device is arranged in the primary separation chamber, and a first exhaust hole is arranged on a side wall of the primary separation chamber;

[0011] The secondary separation chamber has an outlet, a secondary separation device is arranged in the secondary separation chamber, and a second exhaust hole is arranged on a side wall of the secondary separation chamber.

[0012] Based on the above technical solution, the present application can also be improved as follows:

[0013] In a possible implementation, a first baffle is further provided in the primary separation chamber, the first baffle divides the primary separation chamber into a first chamber and a second chamber, and the first baffle has a second through hole;

[0014] The first chamber is provided with a liquid inlet component, wherein the liquid inlet component has a spiral liquid inlet channel, and the spiral liquid inlet channel is communicated with the introduction port.

[0015] In a possible implementation, the first-stage separation device is disposed in the second chamber, and the first-stage separation device includes a separation funnel;

[0016] A first channel is provided between the separation funnel and the inner wall of the shell. The first end of the separation funnel is a wide-mouth end facing the introduction port. The second end of the separation funnel is closed.

[0017] In a possible implementation, the primary separation device further includes a gas collecting member, the gas collecting member is located on a side of the separation funnel away from the inlet, and a second channel is provided between the gas collecting member and the inner wall of the shell;

[0018] The gas collecting member comprises a plurality of gas collecting plates, each of which is arranged around the outer circumference of the suction pipe. The suction pipe has a plurality of third channels, each of which is located on a corresponding gas collecting plate.

[0019] In a possible implementation, the primary separation device further includes a corrugated plate, the corrugated plate is located on a side of the gas collecting member away from the inlet, and the corrugated plate is filled between the suction pipe and the inner wall of the shell.

[0020] In a possible implementation, the primary separation device further includes a swirl blade, the swirl blade is located on a side of the corrugated plate away from the inlet, and the swirl blade spirally surrounds the outer circumference of the suction pipe.

[0021] In a possible implementation, a fourth channel is provided between the secondary separation device and the inner wall of the shell, and the fourth channel is communicated with the outlet;

[0022] The secondary separation device has a spiral separation channel, the input end of the separation channel is connected to the output end of the suction pipe, and the output end of the separation channel is connected to the second exhaust hole;

[0023] The secondary separation device has a first liquid drainage hole at one end close to the inlet, and the first liquid drainage hole communicates with the separation channel and the fourth channel.

[0024] In a possible implementation, a filling block is further provided in the secondary separation chamber, wherein the filling block has a cavity, wherein the cavity has a first opening and a second opening, and the second opening is communicated with the second exhaust hole;

[0025] An exhaust ball valve is arranged in the cavity, and the exhaust ball valve is arranged between the first opening and the output end of the separation channel.

[0026] In a possible implementation, a second baffle is further provided in the secondary separation chamber, the second baffle is located on the side of the secondary separation device away from the inlet, the second baffle has a second drainage hole, and the second drainage hole connects the fourth channel and the outlet.

[0027] On the other hand, the present application provides an oil production device, comprising any of the gas-liquid separation devices described above.

[0028] The gas-liquid separation device and oil production device provided in this application have the following beneficial effects:

[0029] A partition is passed through the shell, so that the partition divides the shell into a primary separation chamber and a secondary separation chamber, and the primary separation chamber and the secondary separation chamber are connected. The primary separation chamber has an inlet for the gas-liquid mixture to flow in, and the primary separation chamber has a primary separation device, so that the gas-liquid mixture is subjected to primary gas-liquid separation through the primary separation device, and the gas after the primary gas-liquid separation is discharged and collected through a first exhaust hole arranged on the side wall of the primary separation chamber.

[0030] By arranging a suction pipe in the shell, the two ends of the suction pipe are respectively located in the primary separation chamber and the secondary separation chamber, and the partition has a first through hole, so that the gas-liquid mixture after the primary gas-liquid separation enters the secondary separation chamber through the suction pipe or the first through hole. By arranging a secondary separation device in the secondary separation chamber, the secondary separation chamber has an outlet, and the side wall of the secondary separation chamber is provided with a second exhaust hole, so that the gas-liquid mixture after the primary gas-liquid separation is subjected to secondary separation through the secondary separation device, the gas after the secondary separation is discharged and collected through the second exhaust hole, and the liquid after the secondary separation is drawn out and collected through the outlet. With such an arrangement, the gas-liquid separation device and the oil production device provided in the present application can perform primary separation through the primary separation device and secondary separation through the secondary separation device, thereby improving the gas-liquid separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 Schematic diagram of the gas-liquid separation device structure provided for the application.

[0033] Description of reference numerals:

[0034] 1- housing;

[0035] 100-partition;

[0036] 110- first through hole;

[0037] 200- primary separation chamber;

[0038] 210-inlet; 220-primary separation equipment; 221-separation funnel; 222-gas collecting member;

[0039] 223-gas collecting plate; 224-corrugated plate; 225-swirl blade; 230-first exhaust hole;

[0040] 240 - first baffle; 241 - second through hole; 250 - first chamber; 251 - liquid inlet;

[0041] 252- spiral liquid inlet channel; 260- second chamber; 270- first channel;

[0042] 280-Second channel;

[0043] 300-secondary separation chamber;

[0044] 310- outlet; 320- secondary separation equipment; 321- separation channel;

[0045] 322-first liquid discharge hole; 330-second exhaust hole; 340-fourth channel;

[0046] 350-filling block; 351-cavity; 360-exhaust ball valve; 370-second baffle;

[0047] 371-second drainage hole;

[0048] 400-suction pipe;

[0049] 410-Third channel. DETAILED DESCRIPTION

[0050] The gas-liquid separation effect of the gas-liquid separation method in the related technology is limited. The reason for this problem is that the current gas-liquid separation method is usually gravity separation or inertial separation. Gravity separation refers to the use of the density difference between gas and liquid to achieve separation between the two. When the gravity on the liquid is greater than the buoyancy of the gas, the separation is achieved by the gas floating and the liquid settling. Inertial separation refers to the rapid turning of the gas-liquid mixture, using the different densities of the two, the gas and liquid move along different orbits under the action of centrifugal force, thereby achieving separation, but the above-mentioned gas-liquid separation method is single and the separation effect is limited.

[0051] In response to the above technical problems, the present application provides a gas-liquid separation device and an oil production device, wherein a gas-liquid mixture enters a primary separation chamber through an inlet, the gas-liquid mixture undergoes primary gas-liquid separation through a primary separation device, the gas after the primary gas-liquid separation is discharged and collected from a first exhaust hole, the liquid after the primary separation enters a secondary separation chamber through a suction pipe or a first through hole, undergoes secondary gas-liquid separation through a secondary separation device, the gas after the secondary separation is discharged and collected from a second exhaust hole, the liquid after the secondary separation is discharged and collected through an inlet port, and the gas-liquid separation effect of the gas-liquid mixture is improved by performing primary separation by the primary separation device and secondary separation by the secondary separation device.

[0052] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0053] refer to Figure 1 , an embodiment of the present application provides a gas-liquid separation device, which is used to separate a gas-liquid mixture from crude oil, wherein the gas includes carbon dioxide and the liquid includes petroleum. The gas-liquid separation device includes a shell 1, which is the main structure of the gas-liquid separation device. The shell 1 can protect the structure of the gas-liquid separation device located inside the shell 1. The shell 1 can be made of metal materials such as stainless steel to ensure the high pressure resistance and corrosion resistance of the shell 1. A partition 100 is arranged in the shell 1. The partition 100 can be made of metal materials such as stainless steel. The partition 100 can be welded on the inner wall of the shell 1. The partition 100 divides the shell 1 into a primary separation chamber 200 and a secondary separation chamber 300. The partition 100 has a first through hole 110, and the primary separation chamber 200 and the secondary separation chamber 300 are connected through the first through hole 110.

[0054] A suction pipe 400 is provided in the housing 1, and the two ends of the suction pipe 400 are respectively located in the primary separation chamber 200 and the secondary separation chamber 300, and the suction pipe 400 communicates with the primary separation chamber 200 and the secondary separation chamber 300. The suction pipe 400 can be made of metal materials such as stainless steel. The suction pipe 400 is located in the housing 1, for example, there is an annular bracket in the housing 1, and the two ends of the annular bracket are respectively connected to the suction pipe 400 and the inner wall of the housing 1, and the suction pipe 400 is installed in the housing 1 through the annular bracket.

[0055] The primary separation chamber 200 is used to perform primary separation on the gas-liquid mixture. Primary separation refers to the initial separation of gas and liquid in the gas-liquid mixture. The primary separation chamber 200 has an inlet 210, and the inlet 210 is used to flow into the gas-liquid mixture. The primary separation chamber 200 is provided with a primary separation device 220, and the primary separation device 220 is used for primary separation of the gas-liquid mixture. For example, the primary separation device 220 can be any one or a combination of a centrifugal separator and a gravity separator. After the gas-liquid mixture enters the primary separation chamber 200 from the inlet 210, the gas and liquid are separated into the primary state by the primary separation device 220.

[0056] A first exhaust hole 230 is arranged on the side wall of the primary separation chamber 200. For example, the first exhaust hole 230 is arranged on the side wall of the primary separation chamber 200 away from the inlet 210. The first exhaust hole 230 is used to discharge the gas after the primary separation, for example, to discharge the gas after the primary separation into the carbon dioxide collection equipment.

[0057] The secondary separation chamber 300 is used to perform secondary separation on the gas-liquid mixture. The secondary separation refers to the secondary separation of the gas-liquid mixture on the basis of the primary separation. The secondary separation chamber 300 has an outlet 310, and the outlet 310 is used to lead out the liquid after the secondary separation. Figure 1 As shown, the outlet 310 may be disposed on the top wall of the secondary separation chamber on a side away from the inlet 210 .

[0058] A secondary separation device 320 is provided in the secondary separation chamber 300. The secondary separation device 320 is used for secondary separation of the gas-liquid mixture. For example, the secondary separation device 320 can be any one or a combination of a centrifugal separator and a gravity separator. The gas-liquid mixture after primary separation enters the secondary separation chamber 300 from the suction pipe 400 or the first through hole 110. The gas-liquid mixture after primary separation is subjected to secondary separation into gas and liquid by the secondary separation device in the secondary separation chamber 300. The liquid after secondary separation is led out of the housing 1 through the outlet 310.

[0059] The side wall of the secondary separation chamber 300 is provided with a second exhaust hole 330. Figure 1As shown, the second exhaust hole 330 can be set on the side wall of the secondary separation chamber 300 away from the inlet 210. The second exhaust hole 330 is used to discharge the gas after secondary separation, for example, to discharge the gas after secondary separation into a carbon dioxide collection device.

[0060] The embodiment of the present application provides a gas-liquid separation device, wherein a partition 100 is passed through a housing 1, so that the partition 100 divides the housing 1 into a primary separation chamber 200 and a secondary separation chamber 300, and the primary separation chamber 200 and the secondary separation chamber 300 are connected. The primary separation chamber 200 has an inlet 210 for the inflow of a gas-liquid mixture, and the primary separation chamber 200 has a primary separation device 220, so that the gas-liquid mixture is subjected to primary gas-liquid separation through the primary separation device 220, and the gas after the primary gas-liquid separation is discharged and collected through a first exhaust hole 230 provided on the side wall of the primary separation chamber 200.

[0061] By arranging a suction pipe 400 in the shell 1, the two ends of the suction pipe 400 are respectively located in the primary separation chamber 200 and the secondary separation chamber 300, and the partition 100 has a first through hole 110, so that the gas-liquid mixture after the primary gas-liquid separation enters the secondary separation chamber 300 through the suction pipe 400 or the first through hole 110. By arranging a secondary separation device 320 in the secondary separation chamber 300, the secondary separation chamber 300 has an outlet 310, and the side wall of the secondary separation chamber 300 is provided with a second exhaust hole 330, so that the gas-liquid mixture after the primary gas-liquid separation is subjected to secondary separation through the secondary separation device 320, the gas after the secondary separation is discharged and collected through the second exhaust hole 330, and the liquid after the secondary separation is discharged and collected through the outlet 310. Compared with the related art, the gas-liquid separation device and the oil production device provided in the present application perform primary separation through the primary separation device 220 and secondary separation through the secondary separation device 320, thereby improving the gas-liquid separation effect.

[0062] refer to Figure 1 In some embodiments, a first baffle 240 is further disposed in the primary separation chamber 200. The first baffle 240 may be made of metal materials such as stainless steel. The first baffle 240 divides the primary separation chamber 200 into a first chamber 250 and a second chamber 260. The first baffle 240 has a second through hole 241, and the first chamber 250 and the second chamber 260 are connected through the second through hole 241.

[0063] The first chamber 250 is used to introduce a gas-liquid mixture. A liquid inlet 251 is provided in the first chamber 250. The liquid inlet 251 has a spiral liquid inlet channel 252. The spiral liquid inlet channel 252 is connected to the introduction port 210. The gas-liquid mixture flows into the first chamber 250 through the introduction port 210 and the spiral liquid inlet channel 252. After the first chamber 250 is filled with the gas-liquid mixture, the gas-liquid mixture enters the second chamber 260 through the second through hole 241. The second chamber 260 is used for primary separation of the gas-liquid mixture. When the gas-liquid mixture passes through the spiral liquid inlet channel 252, under the action of centrifugal force, the liquid and a small part of the gas in the gas-liquid mixture are initially separated, further increasing the gas-liquid separation effect.

[0064] refer to Figure 1 In some embodiments, a primary separation device 220 is disposed in the second chamber 260, and the primary separation device 220 includes a separation funnel 221, such as Figure 1 As shown, the separation funnel 221 is disposed on one side of the second chamber 260 close to the inlet 210. The separation funnel 221 has a first end and a second end, wherein the first end is a large-mouth end, and the large-mouth end faces the inlet 210. Figure 1 As shown, the wide mouth end of the separation funnel 221 is close to the inlet 210 relative to the second end of the separation funnel 221, and the second end of the separation funnel 221 is closed. This arrangement allows bubbles in the gas-liquid mixture to collide with the inner wall of the separation funnel 221, and the bubbles burst under the action of the collision impact force, and the gas in the bubbles overflows, thereby separating the gas and further improving the gas-liquid separation effect.

[0065] There is a first channel 270 between the separation funnel 221 and the inner wall of the shell 1. There is a gap between the separation funnel 221 and the inner wall of the shell 1. The gas-liquid mixture separated by the separation funnel 221 passes through the first channel 270 and then enters the secondary separation chamber 300 through the suction pipe 400 or the first through hole 110 for secondary separation.

[0066] refer to Figure 1 In some embodiments, the primary separation device 220 further includes a gas collecting member 222, which is located on a side of the separation funnel 221 away from the inlet 210. Figure 1 As shown, the gas collecting member 222 is located above the separation funnel 221. A second channel 280 is provided between the gas collecting member 222 and the inner wall of the housing 1, and a gap is provided between the gas collecting member 222 and the inner wall of the housing 1.

[0067] The gas collecting member 222 includes a plurality of gas collecting plates 223, and the number of the gas collecting plates 223 may be three, four, five or more. Figure 1As shown, the gas collecting plate 223 is arranged around the outer periphery of the suction pipe 400, and the suction pipe 400 has a plurality of third channels 410. The number of the gas collecting plates 223 can be three, four, five or more. The third channels 410 can be openings arranged on the side wall of the suction pipe 400, and the third channels 410 are respectively located on the corresponding gas collecting plates 223.

[0068] The first part of the gas-liquid mixture in the suction pipe 400 flows through the suction pipe 400, the third channel 410, and the second channel 280 and enters the secondary separation chamber 300 through the first through hole 110. The second part of the gas-liquid mixture in the suction pipe 400 directly enters the secondary separation chamber 300 through the suction pipe 400.

[0069] Among them, when the first part of the gas-liquid mixture flows through the suction pipe 400 and the third channel 410, the first part of the gas-liquid mixture is turned due to the gas collecting plate 223 arranged around the outer periphery of the suction pipe 400. The centrifugal action during the turning further separates the gas and liquid, thereby improving the gas-liquid separation effect.

[0070] refer to Figure 1 In some embodiments, the primary separation device 220 further includes a corrugated plate 224, which is composed of corrugated thin plate elements arranged at a certain interval to form a curved flow channel. When the gas-liquid mixture enters these flow channels, due to the large difference in gas-liquid density, their movement trajectories will deviate. Since the corrugated plate 224 is a mature product, it will not be described in detail here. The corrugated plate 224 is located on the side of the gas collecting member 222 away from the inlet 210, such as Figure 1 As shown, the corrugated plate 224 is located above the gas collecting member 222. The corrugated plate 224 is filled between the suction pipe 400 and the inner wall of the shell 1, and is arranged so that the first part of the gas-liquid mixture needs to flow through the corrugated plate 224 before entering the first through hole 110, and the gas-liquid separation can be further performed through the corrugated plate 224, thereby improving the gas-liquid separation effect.

[0071] refer to Figure 1 In some embodiments, the primary separation device 220 further includes a swirl blade 225, which is located on a side of the corrugated plate 224 away from the inlet 210. Figure 1 As shown, the swirl blade 225 is located on the corrugated plate 224. The swirl blade 225 is a spiral blade. The swirl blade 225 spirally surrounds the outer periphery of the suction pipe 400. The swirl blade 225 spirally extends upward on the outer peripheral side wall of the suction pipe 400. It should be noted that the extension direction of the swirl blade 225 can be clockwise or counterclockwise. In this way, the gas-liquid mixture separated by the corrugated plate 224 is further separated from the gas and liquid under the centrifugal force of the swirl blade when passing through the swirl blade, thereby improving the gas-liquid separation effect.

[0072] refer to Figure 1 In some embodiments, a fourth channel 340 is provided between the secondary separation device 320 and the inner wall of the shell 1 . The fourth channel 340 is a gap between the secondary separation device 320 and the inner wall of the shell 1 . The fourth channel 340 is connected to the outlet 310 .

[0073] The secondary separation device 320 has a spiral separation channel 321 therein. The secondary separation device 320 can be a truncated cone-shaped shell, a cylindrical shell, or a combination of the two. Figure 1 As shown, in the present application, the secondary separation device 320 includes a truncated cone portion and a cylindrical portion, the truncated cone portion is located above the cylindrical portion, and the inner wall of the secondary separation device 320 is provided with a spiral separation channel 321, the input end of the separation channel 321 is connected to the output end of the suction pipe 400, and the output end of the separation channel 321 is connected to the second exhaust hole 330. The second separation device 320 has a first drainage hole 322 at one end close to the inlet 210, for example, the first drainage hole 322 is provided at the bottom of the second separation device 320, and the first drainage hole 322 is connected to the separation channel 321 and the fourth channel 340.

[0074] After the gas-liquid mixture sucked in through the suction pipe 400 enters the separation channel 321, the gas and liquid are separated under the action of the spiral separation channel 321, and the separated gas is discharged from the second exhaust hole 330, and the liquid enters the fourth channel 340 through the first liquid discharge hole 322 and is then discharged from the outlet 310. In this way, the spiral separation channel 321 can further separate the gas and liquid, thereby improving the gas-liquid separation effect.

[0075] refer to Figure 1 In some embodiments, a filling block 350 is further provided in the secondary separation chamber 300, and a cavity 351 is provided in the filling block 350. The cavity 351 is a channel connecting the separation channel 321 and the second exhaust hole 330, and the cavity 351 has a first opening and a second opening. Figure 1 As shown, the second opening of the cavity 351 is communicated with the second exhaust hole 330, the first opening of the cavity 351 is communicated with the output end of the separation channel 321, and an exhaust ball valve 360 ​​is arranged between the first opening of the cavity 351 and the output end of the separation channel 321. When the gas in the separation channel 321 pushes the exhaust ball valve 360, the exhaust ball valve 360 ​​opens, and the gas is discharged through the second opening of the cavity 351 and the second exhaust hole 330. Such an arrangement can prevent liquid from accidentally flowing into the cavity 351.

[0076] refer to Figure 1 In some embodiments, a second baffle 370 is disposed in the secondary separation chamber 300, and the second baffle 370 is located on a side of the secondary separation device 320 away from the inlet 210, such as Figure 1As shown, the second baffle 370 is located above the secondary separation device 320. The second baffle 370 divides the secondary separation chamber 300 into a secondary separation chamber and an outlet chamber. Such a configuration can avoid mutual interference between the secondary separation chamber and the outlet chamber. The second baffle 370 has a second drainage hole 371. The second drainage hole 371 connects the fourth channel 340 and the outlet 310. The gas-liquid mixture after secondary separation by the secondary separation device 320 can flow into the outlet chamber through the first drainage hole 322, the fourth channel 340, and the second drainage hole 371, and then be discharged from the outlet 310 set in the outlet chamber.

[0077] The present application also provides an oil production device, which includes the gas-liquid separation device in any of the above items. The specific structure of the gas-liquid separation device can be found in the above embodiments. The oil production device may also include an oil pipe and an oil pump, the first end of the oil pipe is connected to the top of the gas-liquid separation device, and the second end of the oil pipe is connected to the oil pump, so as to produce oil. Since the oil production device adopts all the technical solutions of any of the above embodiments, it has at least all the beneficial effects brought by any of the above embodiments, which will not be repeated here.

[0078] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0079] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0080] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0081] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0082] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas-liquid separation device for crude oil, characterized in that: include: A shell, wherein a partition is arranged in the shell, the partition divides the shell into a primary separation chamber and a secondary separation chamber, the partition has a first through hole for connecting the primary separation chamber and the secondary separation chamber, and the gas-liquid mixture after primary separation enters the secondary separation chamber from the first through hole; A suction pipe is arranged in the shell, and two ends of the suction pipe are respectively located in the primary separation chamber and the secondary separation chamber; The primary separation chamber has an inlet for introducing a gas-liquid mixture, a primary separation device is arranged in the primary separation chamber, and a first exhaust hole is arranged on a side wall of the primary separation chamber; The secondary separation chamber has an outlet, a secondary separation device is arranged in the secondary separation chamber, and a second exhaust hole is arranged on the side wall of the secondary separation chamber; A first baffle is also provided in the primary separation chamber, the first baffle divides the primary separation chamber into a first chamber and a second chamber, and the first baffle has a second through hole; A liquid inlet member is disposed in the first chamber, the liquid inlet member has a spiral liquid inlet channel, and the spiral liquid inlet channel is communicated with the introduction port; The first-stage separation device is arranged in the second chamber, and the first-stage separation device includes a separation funnel; A first channel is provided between the separation funnel and the inner wall of the shell, the first end of the separation funnel is a wide-mouth end, the wide-mouth end faces the introduction port, and the second end of the separation funnel is closed; The primary separation device further comprises a gas collecting member, the gas collecting member is located at a side of the separation funnel away from the inlet, and a second channel is provided between the gas collecting member and the inner wall of the shell; The gas collecting member comprises a plurality of gas collecting plates, each of which is arranged around the outer periphery of the suction pipe, and the suction pipe has a plurality of third channels, each of which is located on a corresponding gas collecting plate; A fourth channel is provided between the secondary separation device and the inner wall of the shell, and the fourth channel is communicated with the outlet; The secondary separation device has a spiral separation channel, the input end of the separation channel is connected to the output end of the suction pipe, and the output end of the separation channel is connected to the second exhaust hole; The secondary separation device has a first liquid drainage hole at one end close to the inlet, and the first liquid drainage hole communicates with the separation channel and the fourth channel; A second baffle is also provided in the secondary separation chamber. The second baffle is located on a side of the secondary separation device away from the inlet. The second baffle has a second drainage hole. The second drainage hole connects the fourth channel and the outlet.

2. The gas-liquid separation device for crude oil according to claim 1, characterized in that: The primary separation device further comprises a corrugated plate, the corrugated plate is located at a side of the gas collecting member away from the inlet, and the corrugated plate is filled between the suction pipe and the inner wall of the shell.

3. The gas-liquid separation device for crude oil according to claim 2, characterized in that: The primary separation device further comprises a swirl blade, wherein the swirl blade is located at a side of the corrugated plate away from the inlet, and the swirl blade is spirally wound around the outer circumference of the suction pipe.

4. The gas-liquid separation device for crude oil according to any one of claims 1 to 3, characterized in that: The secondary separation chamber is further provided with a filling block, wherein the filling block has a cavity, wherein the cavity has a first opening and a second opening, and the second opening is communicated with the second exhaust hole; An exhaust ball valve is arranged in the cavity, and the exhaust ball valve is arranged between the first opening and the output end of the separation channel.

5. An oil production device, characterized in that: A gas-liquid separation device for crude oil comprising any one of claims 1-4.

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