CN107339080B

CN107339080B - Fluid separation device, well structure, and method for producing oil or natural gas

Info

Publication number: CN107339080B
Application number: CN201710794277.XA
Authority: CN
Inventors: 周侗侗; 唐勇; 张罡; 李军民; 张忠林; 刘树飞; 苏诗策; 易诚雄; 周华; 谭宇茜; 唐湉; 刘向美珂; 刘瀚森; 陈俊宏; 刘士吉
Original assignee: Chengdu Bison Technology Co ltd
Current assignee: CHENGDU BISON TECHNOLOGY Co.,Ltd.
Priority date: 2017-09-06
Filing date: 2017-09-06
Publication date: 2020-10-30
Anticipated expiration: 2037-09-06
Also published as: WO2019047871A1; CN107339080A

Abstract

The invention relates to the technical field of oil and gas exploitation, and discloses a fluid separation device, a well structure and a production method of oil or natural gas. In operation, when the fluid separation device ascends to the upper end of the well, the core pipe collides with the upper impact device, so that the core pipe moves from the closed position to the open position, and at the moment, the control device drives the valve plate to rotate forwards by a first preset angle and increases the flow area of the fluid channel. Therefore, the oil or the natural gas below the fluid separation device can flow to the upper part of the fluid separation device through the fluid channel, the stress area of the fluid separation device is reduced, the fluid separation device can quickly descend to the bottom of the well under the condition of not closing the well, and the oil or natural gas exploitation efficiency is greatly improved.

Description

Fluid separation device, well structure, and method for producing oil or natural gas

Technical Field

The invention relates to the technical field of oil or natural gas exploitation, in particular to a fluid separation device, a well structure and an oil or natural gas production method.

Background

In the process of developing the oil or gas well, when the yield of the oil or gas in the well is low, the oil or gas cannot lift a large amount of liquid to the ground, so that accumulated liquid with a certain height is formed at the bottom of the well, the productivity of the oil or gas well is reduced, and even the blowout of the oil or gas well is stopped.

One related art known to the inventors provides a fluid separation device. The periphery of the fluid separation device is provided with a plurality of separators which are always contacted with the inner wall of the well under the action of the elastic piece to form sealing. Thus, the pressure generated by the fluid below the fluid separation device drives the fluid separation device to move upwards, and accumulated liquid above the fluid separation device is discharged when the fluid separation device moves upwards to a wellhead. A problem with such a flow separation device is that when it is desired to run down, the flow separation device cannot run back down to the bottom of the well due to the resistance of the fluid below, or the speed of the run down is slow. In order to run the fluid separation means back downhole, the well can only be shut in to equalize the pressure above and below the fluid separation means, enabling the fluid separation means to run downhole. But this greatly affects the efficiency of oil or gas production.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a fluid separation device which can quickly descend to the bottom of a well under the condition of not closing the well, so that the oil or natural gas exploitation efficiency is greatly improved.

It is another object of the present invention to provide a well structure including the above-described fluid separation device.

A third object of the present invention is to provide a method for producing oil or natural gas based on the above well structure.

The embodiment of the invention is realized by the following technical scheme:

a fluid separation device, comprising: a barrel; a plurality of partitions arranged about the barrel axis; a first elastic member coupled to the partitioning member and configured to apply an elastic force to the partitioning member radially outward of the barrel; a core tube slidably engaged with the cylinder and configured to move back and forth between an open position and a closed position in an axial direction of the cylinder; two ends of the core pipe are open, and a fluid channel is formed in the core pipe; a valve plate rotatably disposed within the fluid passageway; a control device located within the fluid passageway; in the process that the core pipe moves from the closing position to the opening position, the control device drives the valve plate to rotate forward by a first preset angle and increases the flow area of the fluid channel; in the process that the core pipe moves from the opening position to the closing position, the control device drives the valve plate to rotate reversely by a second preset angle and reduces the flow area of the fluid channel.

Further, the valve plate is rotatably connected with the core pipe through a rotating shaft; the core pipe is provided with a first long hole extending along the axial direction of the core pipe; the control device comprises a connecting rod; one end of the connecting rod is rotatably connected with the valve plate; the other end of the connecting rod penetrates through the first long hole and is rotatably connected with the cylinder body.

Furthermore, a first long hole extending along the axial direction of the core pipe is formed in the core pipe; the valve plate is rotatably connected with the cylinder body through a rotating shaft penetrating through the first strip hole; the control device comprises a connecting rod; one end of the connecting rod is rotatably connected with the valve plate; the other end of the connecting rod is rotatably connected with the core pipe.

Furthermore, a first long hole extending along the axial direction of the core pipe is formed in the core pipe; the valve plate is rotatably connected with the cylinder body through a rotating shaft penetrating through the first strip hole; two opposite plate surfaces of the valve plate are respectively provided with a first inclined surface and a second inclined surface; the first inclined plane and the second inclined plane are positioned at two sides of the rotating shaft; the control device comprises a first convex body and a second convex body which are arranged on the inner wall of the core tube; in the process that the core pipe moves from the closing position to the opening position, the second inclined surface is separated from the second convex body, then the first convex body is contacted with the plate surface of the valve plate, and the valve plate is driven to rotate forwards by a first preset angle; in the process that the core pipe moves from the closing position to the opening position, firstly, the first convex body is in contact with the first inclined surface and drives the valve plate to rotate reversely by a third preset angle, and then the second convex body is in contact with the second inclined surface and continues to drive the valve plate to rotate reversely by a fourth preset angle; the sum of the third preset angle and the fourth preset angle is equal to the second preset angle.

Further, the valve plate is rotatably connected with the core pipe through a rotating shaft; two opposite plate surfaces of the valve plate are respectively provided with a first inclined surface and a second inclined surface; the first inclined plane and the second inclined plane are positioned at two sides of the rotating shaft; the core pipe is provided with a first long hole extending along the axial direction of the core pipe; the control device comprises a first convex body and a second convex body which respectively penetrate through the first strip-shaped hole and are connected with the cylinder body; in the process that the core pipe moves from the closing position to the opening position, the second inclined surface is separated from the second convex body, then the first convex body is contacted with the plate surface of the valve plate, and the valve plate is driven to rotate forwards by a first preset angle; in the process that the core pipe moves from the closing position to the opening position, firstly, the first convex body is in contact with the first inclined surface and drives the valve plate to rotate reversely by a third preset angle, and then the second convex body is in contact with the second inclined surface and continues to drive the valve plate to rotate reversely by a fourth preset angle; the sum of the third preset angle and the fourth preset angle is equal to the second preset angle.

Furthermore, a first long hole extending along the axial direction of the core pipe is formed in the core pipe; the valve plate is rotatably connected with the cylinder body through a rotating shaft penetrating through the first strip hole; a first inclined plane and a second inclined plane which are opposite to each other are arranged on one plate surface of the valve plate; the first inclined plane and the second inclined plane are positioned at two sides of the rotating shaft; the control device comprises a first convex body, a second convex body and a third convex body which are arranged on the inner wall of the core pipe; in the process that the core pipe moves from the closing position to the opening position, the valve plate is separated from the third convex body firstly, then the first convex body is contacted with the first inclined surface, and the valve plate is driven to rotate forwards by a first preset angle; in the process that the core pipe moves from the opening position to the closing position, the second convex body is firstly contacted with the second inclined surface and drives the valve plate to rotate reversely by a third preset angle; then the third convex body contacts with the other plate surface of the valve plate and continues to drive the valve plate to rotate reversely by a fourth preset angle; the sum of the third preset angle and the fourth preset angle is equal to the second preset angle.

Further, the valve plate is rotatably connected with the core pipe through a rotating shaft; a first inclined plane and a second inclined plane which are opposite to each other are arranged on one plate surface of the valve plate; the first inclined plane and the second inclined plane are positioned at two sides of the rotating shaft; the core pipe is provided with a first long hole extending along the axial direction of the core pipe; the control device comprises a first convex body, a second convex body and a third convex body which respectively penetrate through the first strip-shaped hole and are connected with the cylinder body; in the process that the core pipe moves from the closing position to the opening position, the valve plate is separated from the third convex body firstly, then the first convex body is contacted with the first inclined surface, and the valve plate is driven to rotate forwards by a first preset angle; in the process that the core pipe moves from the opening position to the closing position, the second convex body is firstly contacted with the second inclined surface and drives the valve plate to rotate reversely by a third preset angle; then the third convex body contacts with the other plate surface of the valve plate and continues to drive the valve plate to rotate reversely by a fourth preset angle; the sum of the third preset angle and the fourth preset angle is equal to the second preset angle.

Furthermore, a first long hole extending along the axial direction of the core pipe is formed in the core pipe; the valve plate is rotatably connected with the cylinder body through a rotating shaft penetrating through the first strip hole; the control device comprises a first spring; one end of the first spring is rotatably connected with the valve plate; the other end of the first spring is rotatably connected with the core tube.

Further, the fluid separation device further comprises a mandrel; the mandrel is connected with the core pipe and extends along the axial direction of the cylinder body; the barrel is provided with a through hole; the separator is slidably engaged with the through hole; one end of the first elastic piece is rotatably connected with the separating piece; the other end of the first elastic piece is rotatably matched with the mandrel; when the core tube is positioned at the closed position, the first elastic piece is compressed and drives the separating piece to move outwards in the radial direction; when the core is in the open position, the first resilient member is stretched and causes the partition members to move radially inwardly.

Furthermore, the separating piece comprises an arc-shaped separating sheet and a connecting sheet connected to the inner arc surface of the separating sheet; the first elastic piece is rotatably connected with the connecting piece.

Furthermore, a positioning ring is arranged in the cylinder body; the positioning ring is provided with a first clamping part; one end of the core tube is provided with a second clamping part which is detachably clamped with the first clamping part; when the core pipe is located the open position, first joint portion and second joint portion joint.

Furthermore, a first positioning space and a second positioning space are arranged on the core pipe, and the cylinder body is connected with a positioning block through an elastic resetting piece; or the cylinder body is provided with a first positioning space and a second positioning space, and the core pipe is connected with a positioning block through an elastic reset piece; when the core pipe is positioned at the opening position, the positioning block is embedded into the first positioning space under the action of the elastic resetting piece; when the core pipe is located at the closed position, the positioning block is embedded into the second positioning space under the action of the elastic resetting piece.

Furthermore, the fluid separation device also comprises a guide device which penetrates through the cylinder body, one end of the guide device is connected with the separation piece, and the other end of the guide device is slidably matched with the core pipe through a matching surface; wherein the mating surface extends gradually radially outward relative to the barrel in a direction from the closed position to the open position; when the core tube moves to the opening position, the guide device drives the separating piece to move inwards in the radial direction relative to the cylinder body; when the core tube moves towards the closed position, the first elastic element drives the separating element to move radially outwards relative to the cylinder body.

A well structure comprises a well, an upper impact device and a lower impact device which are respectively arranged at the upper end and the lower end of the well, and any one fluid separation device; a fluid separation device disposed within the hoistway and configured to slide axially along the hoistway; the core tube moves to the open position when the core tube collides with the upper striking device and moves to the closed position when the core tube collides with the lower striking device.

A production method of oil or natural gas is realized on the basis of the well structure, and comprises the following steps: when the fluid separation device descends, the outlet of the well is opened.

The technical scheme of the invention at least has the following advantages and beneficial effects:

according to the fluid separation device and the well structure provided by the embodiment of the invention, when the fluid separation device ascends to the upper end of the well, the core pipe collides with the upper collision device, so that the core pipe moves from the closed position to the open position, and at the moment, the control device drives the valve plate to rotate forwards by the first preset angle and increases the flow area of the fluid channel. Therefore, the fluid below the fluid separation device can flow to the upper part of the fluid separation device through the fluid channel, the stress area of the fluid separation device is reduced, the fluid separation device can quickly descend to the bottom of the well under the condition of not closing the well, and the oil or natural gas exploitation efficiency is greatly improved.

According to the method for producing the petroleum or the natural gas, provided by the embodiment of the invention, the outlet of the well is opened when the fluid separation device descends, so that the petroleum or the natural gas can still be sprayed out of the well when the fluid separation device descends, the continuous production of the petroleum or the natural gas is realized, and the production efficiency is greatly improved.

Drawings

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings needed to be used in the embodiment are briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. From these figures, other figures can be derived by those skilled in the art without inventive effort.

Fig. 1a to 1c are process diagrams of the fluid separation device provided in embodiment 1, which is switched from an open state to a closed state;

fig. 1 d-1 f are process diagrams of the fluid separation device provided in embodiment 1 for switching from a closed state to an open state;

FIG. 2 is an enlarged view of FIG. 1a at C;

fig. 3a is an operation state diagram of the shaft structure provided in embodiment 1;

fig. 3b is another working state diagram of the hoistway structure provided by the embodiment 1;

4 a-4 c are partial structural schematic diagrams of the fluid separation device provided by the embodiment 2 for switching from an open state to a closed state;

4 d-4 f are partial structural schematic diagrams of the fluid separation device converted from the closed state to the open state provided by the embodiment 2;

5 a-5 c are partial schematic structural views of the fluid separation device provided in embodiment 3, which is switched from an open state to a closed state;

5 d-5 f are partial schematic structural views of the fluid separation device provided in embodiment 3, which is switched from a closed state to an open state;

FIG. 6a is a schematic structural view of the fluid separation device provided in example 4 in an open state;

FIG. 6b is a schematic structural view of the fluid separation device provided in example 4 in a closed state;

fig. 7a is an operation state diagram of the shaft structure provided in embodiment 4;

fig. 7b is another working state diagram of the hoistway structure provided in embodiment 4;

FIG. 8 is a schematic view showing the structure of a separator in example 4;

FIG. 9 is a schematic view showing the structure of the positioning ring engaging with the core tube according to embodiment 4.

In the figure: 010-a fluid separation means; 100-barrel body; 110-a via; 120-a positioning ring; 121-a first clamping part; 200-a separator; 210-a separator; 220-connecting piece; 300-a first resilient member; 400-core tube; 401-a fluid channel; 410-a first elongated hole; 420-a second clamping part; 430-a second elongated hole; 500-a valve plate; 510-a rotating shaft; 520-a first bevel; 530-a second bevel; 600-a control device; 610-connecting rod; 620-first convexity; 621-a first contact surface; 622-second contact surface; 630-a second spur; 640-a third spur; 650-a first spring; 651-first paragraph; 652-second segment; 653-third section; 700-mandrel; 810-a first location space; 820-a second positioning space; 830-an elastic reset member; 840-a positioning block; 850-mating face; 900-a guide; 910-a connecting segment; 920-a guide section; 020-hoistway structure; 201-a well; 202-an upper percussion device; 203-lower percussion device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.

Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments of the present invention and the features and technical solutions thereof may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like refer to orientations or positional relationships based on those shown in the drawings, or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and such terms are used for convenience of description and simplification of the description, and do not refer to or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Example 1:

please refer to fig. 1 a-1 f and fig. 2. Wherein: fig. 1a to 1c are diagrams illustrating a process of switching the fluid separation device 010 from the open state to the closed state according to the present embodiment; fig. 1 d-1 f are diagrams illustrating a process of switching the fluid separation device 010 from the closed state to the open state according to the present embodiment; fig. 2 is an enlarged view of fig. 1a at C.

In this embodiment, the fluid separation device 010 includes a cylinder 100, a spacer 200, a first elastic member 300, a core tube 400, a valve plate 500, and a control device 600. A plurality of partitions 200 are arranged around the axis of the cartridge 100. The partition 200 is located outside the cartridge 100. The first elastic member 300 is disposed between the partitioning member 200 and the cartridge 100. The first elastic member 300 applies a radially outward elastic force to the partitioning member 200 in the radial direction of the cartridge 100, so that the partitioning member 200 can move radially outward with respect to the cartridge 100. The core tube 400 is open at both ends, and a fluid passage 401 is formed in the core tube 400. The core tube 400 penetrates the cylinder body 100 in the axial direction of the cylinder body 100, and the core tube 400 is slidably engaged with the cylinder body 100 to move back and forth between an open position (a position shown in fig. 1a and 1 f) and a closed position (a position shown in fig. 1c and 1 d) in the axial direction of the cylinder body 100. The valve plate 500 is rotatably disposed within the fluid passage 401. The control device 600 is located within the fluid channel 401. During the movement of the core tube 400 from the open position to the closed position (fig. 1 a-1 c), the control device 600 rotates the valve plate 500 in the reverse direction (direction a in fig. 1 a-1 c) by a second predetermined angle and reduces the flow area of the fluid passage 401. During the movement of the core tube 400 from the closed position to the open position (fig. 1 d-1 f), the control device 600 drives the valve plate 500 to rotate forward (direction B in fig. 1 d-1 f) by a first predetermined angle and increases the flow area of the fluid passage 401.

Specifically, in the present embodiment, the valve plate 500 is rotatably coupled to the core tube 400 by the rotation shaft 510. The core tube 400 is formed with a first elongated hole 410 extending in an axial direction thereof. The control device 600 includes a link 610; one end of the connecting rod 610 is rotatably connected to the valve plate 500; the other end of the link 610 passes through the first elongated hole 410 and is rotatably connected to the cylinder 100. In other embodiments, the valve plate 500 may be rotatably connected to the cylinder 100 by a rotating shaft 510 penetrating the first elongated hole 410; one end of the connecting rod 610 is rotatably connected to the valve plate 500; the other end of the connecting rod 610 is rotatably connected to the core tube 400.

As shown in fig. 1a to 1c, in the initial state, the fluid isolation device 010 is in the open state, the core tube 400 is located at the lowest position (open position) relative to the cylinder body 100, and at this time, the valve plate 500 is parallel to the axis of the core tube 400, the flow area of the fluid passage 401 is the largest, and the force-receiving area of the fluid isolation device 010 is the smallest. When the core tube 400 is subjected to an upward force, the core tube 400 moves upward with respect to the cylinder 100, and the connecting rod 610 pushes the valve plate 500 to rotate in the reverse direction, and during the rotation, the valve plate 500 gradually reduces the flow area of the fluid passage 401. When the core tube 400 moves to the uppermost position (closed position) with respect to the cylinder 100, the valve plate 500 is perpendicular to the axis of the core tube 400, the valve plate 500 completely closes the fluid passage 401, the force-receiving area of the fluid separation device 010 is maximized, and the fluid separation device 010 is in a closed state.

As shown in fig. 1d to fig. 1f, in the initial state, the fluid isolation device 010 is in the open state, the core tube 400 is located at the uppermost position (closed position) relative to the cylinder 100, the valve plate 500 is perpendicular to the axis of the core tube 400, the fluid passage 401 is completely closed, and the force-bearing area of the fluid isolation device 010 is the largest. When the core tube 400 is subjected to a downward force, the core tube 400 moves downward with respect to the cylinder 100, and the connecting rod 610 pushes the valve plate 500 to rotate in the forward direction, and during the rotation, the valve plate 500 gradually increases the flow area of the fluid passage 401. When the core tube 400 moves to the lowermost position (open position) with respect to the cylinder body 100, the valve plate 500 is parallel to the axis of the core tube 400, the flow area of the fluid passage 401 is the largest, the force-receiving area of the fluid partitioning device 010 is the smallest, and the fluid partitioning device 010 is in the open state.

Referring to fig. 3a and 3b, the present embodiment further provides a hoistway structure 020. The well structure 020 includes a well 201, an upper collision device 202 and a lower collision device 203 respectively disposed at upper and lower ends of the well 201, and a fluid separation device 010 provided in this embodiment. The fluid separation device 010 is provided in the well 201 and is slidable in the axial direction of the well 201. Fig. 3a is a schematic diagram of the structure of the fluid separation device 010 moving to the lower end of the hoistway 201 and the core tube 400 colliding with the lower collision device 203, where the core tube 400 is at the closed position and the fluid separation device 010 is in the closed state. Fig. 3b is a schematic diagram of the structure of the fluid separation device 010 moving to the upper end of the well 201 and the core tube 400 colliding with the upper collision device 202, wherein the core tube 400 is at the open position and the fluid separation device 010 is in the open state.

Please refer to fig. 1 a-1 c and fig. 3 a. When the fluid separation device 010 moves to the lower end of the well 201 and the core tube 400 collides with the lower collision device 203, the core tube 400 moves upward relative to the cylinder 100, the connecting rod 610 pushes the valve plate 500 to rotate reversely, and during the rotation, the valve plate 500 gradually reduces the flow area of the fluid passage 401. When the core tube 400 moves to the uppermost position (closed position) with respect to the cylinder 100, the valve plate 500 is perpendicular to the axis of the core tube 400, the valve plate 500 completely closes the fluid passage 401, the force-receiving area of the fluid separation device 010 is maximized, and the fluid separation device 010 is in a closed state. At this time, the fluid below the fluid isolation device 010 is difficult to flow to the upper side of the fluid isolation device 010, and the fluid pressure below the fluid isolation device 010 completely acts on the fluid isolation device 010, thereby driving the fluid isolation device 010 to move upwards. During the upward movement of the fluid isolation device 010, the accumulated fluid above the fluid isolation device 010 is lifted upwards and discharged through the wellhead. In this process, the first elastic member 300 makes the spacer 200 contact with the inner wall of the well 201, so that a gap between the fluid separation device 010 and the well 201 is eliminated, the thrust force applied to the fluid separation device 010 is further increased, and the upward velocity of the fluid separation device 010 is increased.

Please refer to fig. 1 f-1 d and fig. 3 b. When the fluid separation device 010 moves to the upper end of the well 201 and the core tube 400 collides with the upper collision device 202, the core tube 400 moves downward relative to the cylinder 100, the connecting rod 610 pushes the valve plate 500 to rotate forward, and the valve plate 500 gradually increases the flow area of the fluid passage 401 during the rotation. When the core tube 400 moves to the lowermost position (open position) with respect to the cylinder body 100, the valve plate 500 is parallel to the axis of the core tube 400, the flow area of the fluid passage 401 is the largest, the force-receiving area of the fluid partitioning device 010 is the smallest, and the fluid partitioning device 010 is in the open state. At this time, the fluid below the fluid separation device 010 flows to above the fluid separation device 010 through the fluid channel 401. The fluid separation device 010 is basically only under the action of fluid viscosity resistance and end face thrust, and the fluid separation device 010 is very small in stress, so that the fluid separation device 010 can quickly descend to the bottom of a well under the condition of not closing the well, and the oil or natural gas exploitation efficiency is greatly improved.

During the descending process of the fluid separation device 010, if the spacer 200 is continuously in contact with the inner wall of the well 201, the friction force between the spacer 200 and the inner wall of the well 201 will slow down the descending speed of the fluid separation device 010, and will make the spacer 200 be worn more quickly, resulting in poor sealing when the fluid separation device 010 ascends, and reducing the service life of the fluid separation device 010. To overcome this problem, in the present embodiment, the fluid separation device 010 further includes a guide 900 penetrating the cylinder 100, and having one end connected to the spacer 200 and the other end slidably engaged with the core tube 400 through the engagement surface 850. Wherein the mating surface 850 extends gradually radially outward relative to the cartridge 100 in the direction from the closed position to the open position; when the core tube 400 is moved towards the open position, the guide 900 causes the spacer 200 to move radially inwards with respect to the barrel 100; when the core tube 400 moves to the closed position, the first elastic member 300 brings the partitioning member 200 to move radially outward with respect to the cylinder 100.

Specifically, in the present embodiment, the core tube 400 is provided with a second elongated hole 430 extending along the axial direction thereof. Guide 900 includes a connecting section 910 and a guide section 920; the connection section 910 is connected to the separator 200, the guide section 920 is connected to the connection section 910, and the guide section 920 passes through the second elongated hole 430 and enters the core tube 400; the mating surface 850 is disposed on the guide section 920. The mating surface 850 slidably mates with an end edge of the second elongated aperture 430. When the core tube 400 is moved towards the open position, the guide 900 carries the spacer 200 radially inwardly relative to the barrel 100 by the engagement surface 850 on the guide section 920. When the core tube 400 is moved towards the expanded position, the first resilient member 300 carries the separating member 200 radially outwardly relative to the barrel 100. Thus, when the core tube 400 is in the open position, the spacer 200 is disengaged from the inner wall of the hoistway 201, forming an annular gap between the fluid separation device 010 and the hoistway 201. Thus, friction between the partition 200 and the inner wall of the hoistway 201 is eliminated, and the fluid below the fluid separation device 010 can flow upward through the annular gap, so that the downward resistance of the fluid separation device 010 is further reduced, the partition 200 is not easily worn, and the service life of the fluid separation device 010 is prolonged.

Further, in order to stably lift the liquid accumulation during the upward movement of the fluid separation device 010, the core tube 400 needs to be maintained at the closed position during the upward movement, and in order to enable the rapid downward movement of the fluid separation device 010, the core tube 400 needs to be maintained at the contracted position during the downward movement. For this, in this embodiment, the lower end of the core tube 400 is provided with a first positioning space 810 and a second positioning space 820 arranged at intervals along the axial direction thereof, and the cylinder 100 is connected with a positioning block 840 through an elastic restoring member 830. When the core tube 400 is located at the open position, the positioning block 840 is inserted into the first positioning space 810 by the elastic restoring member 830 to maintain the core tube 400 at the open position. The positioning block 840 can be escaped from the first positioning space 810 only when the core tube 400 is struck upward. In this way, it is ensured that the core tube 400 is always maintained in the open position during the downward movement. When the core tube 400 is in the closed position, the positioning block 840 is inserted into the second positioning space 820 by the elastic restoring member 830. So that the core tube 400 is maintained in the closed position. The positioning block 840 can be escaped from the second positioning space 820 only when the core tube 400 is subjected to a downward striking force. In this way, it is ensured that the core tube 400 is always maintained in the closed position during the upward movement.

It is understood that in other embodiments, the first positioning space 810 and the second positioning space 820 may be disposed on the cylinder 100, and the positioning block 840 is connected to the core tube 400 through the elastic restoring member 830.

Example 2:

the present embodiment provides a fluid separation device 010 and a well structure 020. The fluid isolation device 010 and the well structure 020 provided in this embodiment are substantially the same as those in embodiment 1, except that the valve plate 500 and the control device 600 are different. In this embodiment, the valve plate 500 and the control device 600 are mainly described, and the rest can refer to embodiment 1, which is not described again in this embodiment.

Please refer to fig. 4 a-4 f. Wherein: fig. 4a to 4c are schematic partial structural views illustrating the fluid isolation device 010 of the present embodiment being switched from the open state to the closed state; fig. 4 d-4 f are partial schematic structural views illustrating the fluid isolation device 010 of this embodiment being switched from the closed state to the open state.

In the present embodiment, the core tube 400 is provided with a first elongated hole 410 extending along the axial direction thereof; the valve plate 500 is rotatably coupled to the cylinder 100 by a rotation shaft 510 penetrating the first elongated hole 410; two opposite plate surfaces of the valve plate 500 are respectively provided with a first inclined surface 520 and a second inclined surface 530; the first inclined surface 520 and the second inclined surface 530 are located at both sides of the rotation shaft 510; the control means 600 includes a first projection 620 and a second projection 630 provided on the inner wall of the core tube 400. In the process of moving the core tube 400 from the open position to the closed position, the first protrusion 620 contacts the first inclined surface 520 and drives the valve plate 500 to reversely rotate (in the direction a in fig. 4a to 4 c) by a third preset angle, and then the second protrusion 630 contacts the second inclined surface 530 and continues to drive the valve plate 500 to reversely rotate by a fourth preset angle; the sum of the third preset angle and the fourth preset angle is equal to the second preset angle. In the process of moving the core tube 400 from the closed position to the open position, the second inclined surface 530 is firstly separated from the second protrusion 630, and then the first protrusion 620 contacts with the plate surface of the valve plate 500 and drives the valve plate 500 to rotate forward (direction B in fig. 4 d-4 f) by a first preset angle.

Specifically, in this embodiment, the first protrusion 620 includes a first contact surface 621 and a second contact surface 622 that are circular arc-shaped. First area of contact 621 contacts with the face of valve plate 500, and second contact surface 622 contacts with first inclined plane 520, so can effectively avoid the face of valve plate 500 and first inclined plane 520 to be by the fish tail, improved fluid separator 010's life. The second convex body 630 is cylindrical, and when the second convex body 630 contacts the second inclined surface 530, the second inclined surface 530 can be effectively prevented from being scratched, and the service life of the fluid separation device 010 is prolonged.

In other embodiments, the valve plate 500 may be rotatably coupled to the core tube 400 by the rotating shaft 510, and the first protrusion 620 and the second protrusion 630 may be coupled to the cylinder 100 through the first elongated hole 410.

As shown in fig. 4a to 4c, in the initial state, the fluid isolation device 010 is in the open state, the core tube 400 is located at the lowest position (open position) relative to the cylinder body 100, and at this time, the valve plate 500 is parallel to the axis of the core tube 400, the flow area of the fluid passage 401 is the largest, and the force-receiving area of the fluid isolation device 010 is the smallest. When the core tube 400 is subjected to an upward force, the core tube 400 moves upward with respect to the cylinder body 100. The first protrusion 620 contacts the first inclined surface 520 to drive the valve plate 500 to rotate reversely by a third predetermined angle, and the second protrusion 630 contacts the second inclined surface 530 to continue to drive the valve plate 500 to rotate reversely by a fourth predetermined angle. The sum of the third preset angle and the fourth preset angle is equal to the second preset angle. During rotation, the valve plate 500 gradually reduces the flow area of the fluid passage 401. When the core tube 400 moves to the uppermost position (closed position) with respect to the cylinder 100, the outer periphery of the valve plate 500 contacts the inner periphery of the core tube 400, the valve plate 500 completely closes the fluid passage 401, the force-receiving area of the fluid isolation device 010 is maximized, and the fluid isolation device 010 is in a closed state.

As shown in fig. 4d to 4f, in the initial state, the fluid isolation device 010 is in the open state, and the core tube 400 is located at the uppermost position (closed position) with respect to the cylinder 100, and at this time, the outer periphery of the valve plate 500 contacts with the inner peripheral surface of the core tube 400, the fluid passage 401 is completely closed, and the force-receiving area of the fluid isolation device 010 is the largest. When the core tube 400 is subjected to a downward force, the core tube 400 moves downward with respect to the cylinder 100, first the second inclined surface 530 is disengaged from the second protrusion 630, and then the first protrusion 620 is brought into contact with the plate surface of the valve plate 500 and drives the valve plate 500 to rotate forward by a first predetermined angle. During rotation, the valve plate 500 gradually increases the flow area of the fluid passage 401. When the core tube 400 moves to the lowermost position (open position) with respect to the cylinder body 100, the valve plate 500 is parallel to the axis of the core tube 400, the flow area of the fluid passage 401 is the largest, the force-receiving area of the fluid partitioning device 010 is the smallest, and the fluid partitioning device 010 is in the open state.

Example 3:

Please refer to fig. 5 a-5 f. Wherein: fig. 5a to 5c are schematic partial structural views illustrating the fluid isolation device 010 of the present embodiment being switched from the open state to the closed state; fig. 5 d-5 f are partial schematic structural views illustrating the fluid isolation device 010 of this embodiment being switched from the closed state to the open state.

In the present embodiment, the core tube 400 is provided with a first elongated hole 410 extending along the axial direction thereof; the valve plate 500 is rotatably coupled to the cylinder 100 by a rotation shaft 510 penetrating the first elongated hole 410; a first inclined plane 520 and a second inclined plane 530 which are opposite to each other are arranged on one plate surface of the valve plate 500; the first inclined surface 520 and the second inclined surface 530 are located at both sides of the rotation shaft 510; the control means 600 includes a first spur 620, a second spur 630 and a third spur 640 provided on the inner wall of the core tube 400. In the process of moving the core tube 400 from the open position to the closed position, the second protrusion 630 contacts the second inclined surface 530 and drives the valve plate 500 to rotate reversely (direction a in fig. 5 a-5 c) by a third preset angle; then the third convex body 640 contacts with the other plate surface of the valve plate 500, and continues to drive the valve plate 500 to rotate reversely by a fourth preset angle; the sum of the third preset angle and the fourth preset angle is equal to the second preset angle. During the movement of the core tube 400 from the closed position to the open position, the valve plate 500 is first disengaged from the third protrusion 640, and then the first protrusion 620 contacts the first inclined surface 520 and drives the valve plate 500 to rotate forward (direction B in fig. 5 d-5 f) by a first predetermined angle.

Specifically, in this embodiment, the first protrusion 620, the second protrusion 630, and the third protrusion 640 are all cylinders, so that the plate surfaces of the first inclined surface 520, the second inclined surface 530, and the valve plate 500 can be effectively prevented from being scratched, and the service life of the fluid isolation device 010 is prolonged.

In other embodiments, the valve plate 500 may be rotatably coupled to the core tube 400 by the rotating shaft 510, and the first protrusion 620, the second protrusion 630, and the third protrusion 640 may be coupled to the cylinder 100 through the first elongated hole 410.

As shown in fig. 5a to 5c, in the initial state, the fluid isolation device 010 is in the open state, the core tube 400 is located at the lowest position (open position) relative to the cylinder body 100, and at this time, the valve plate 500 is parallel to the axis of the core tube 400, the flow area of the fluid passage 401 is the largest, and the force-receiving area of the fluid isolation device 010 is the smallest. When the core tube 400 is subjected to an upward force, the core tube 400 moves upward with respect to the cylinder body 100. First, the second protrusion 630 contacts the second inclined surface 530 and drives the valve plate 500 to rotate reversely by a third preset angle; then the third convex body 640 contacts with the other plate surface of the valve plate 500, and continues to drive the valve plate 500 to rotate reversely by a fourth preset angle; the sum of the third preset angle and the fourth preset angle is equal to the second preset angle. During rotation, the valve plate 500 gradually reduces the flow area of the fluid passage 401. When the core tube 400 moves to the uppermost position (closed position) with respect to the cylinder 100, the plate surface of the valve plate 500 is perpendicular to the axis of the core tube 400, the valve plate 500 completely closes the fluid passage 401, the force-receiving area of the fluid isolation device 010 is the largest, and the fluid isolation device 010 is in the closed state.

As shown in fig. 5d to 5f, in the initial state, the fluid isolation device 010 is in the open state, and the core tube 400 is located at the uppermost position (closed position) with respect to the cylinder 100, and at this time, the outer periphery of the valve plate 500 contacts with the inner peripheral surface of the core tube 400, the fluid passage 401 is completely closed, and the force-receiving area of the fluid isolation device 010 is the largest. When the core tube 400 is subjected to a downward force, the core tube 400 moves downward with respect to the cylinder 100, first the valve plate 500 is separated from the third protrusion 640, and then the first protrusion 620 contacts the first slope 520 and drives the valve plate 500 to rotate forward by a first predetermined angle. During rotation, the valve plate 500 gradually increases the flow area of the fluid passage 401. When the core tube 400 moves to the lowermost position (open position) with respect to the cylinder body 100, the plate surface of the valve plate 500 is parallel to the axis of the core tube 400, the flow area of the fluid passage 401 is the largest, the force-receiving area of the fluid partitioning device 010 is the smallest, and the fluid partitioning device 010 is in the open state.

Example 4:

please refer to fig. 6a and fig. 6 b. Fig. 6a is a schematic structural diagram of the fluid isolation apparatus 010 provided in the present embodiment in an open state; fig. 6b is a schematic structural diagram of the fluid isolation apparatus 010 in the closed state according to the present embodiment.

In this embodiment, the fluid separation device 010 includes a cylinder 100, a spacer 200, a first elastic member 300, a core tube 400, a valve plate 500, and a control device 600. A plurality of partitions 200 are arranged around the axis of the cartridge 100. The partition 200 is located outside the cartridge 100. The first elastic member 300 is disposed between the partitioning member 200 and the cartridge 100. The first elastic member 300 applies a radially outward elastic force to the partitioning member 200 in the radial direction of the cartridge 100, so that the partitioning member 200 can move radially outward with respect to the cartridge 100. The core tube 400 is open at both ends, and a fluid passage 401 is formed in the core tube 400. The core tube 400 penetrates the cylinder body 100 in the axial direction of the cylinder body 100, and the core tube 400 is slidably engaged with the cylinder body 100 to move back and forth between an open position (a position shown in fig. 6 a) and a closed position (a position shown in fig. 6 b) in the axial direction of the cylinder body 100. The valve plate 500 is rotatably disposed within the fluid passage 401. The control device 600 is located within the fluid channel 401. During the movement of the core tube 400 from the open position to the closed position, the control device 600 drives the valve plate 500 to rotate reversely by a second predetermined angle and reduces the flow area of the fluid passage 401. During the movement of the core tube 400 from the closed position to the open position, the control device 600 drives the valve plate 500 to rotate forward by a first predetermined angle and increases the flow area of the fluid passage 401.

Specifically, in the present embodiment, the core tube 400 is located at the upper end of the cylinder body 100, and the outer circumferential surface of the core tube 400 is slidably engaged with the inner circumferential surface of the upper end of the cylinder body 100. The fluid passage 401 communicates with the inner space of the cartridge 100, and fluid can flow upward through the inner space of the cartridge 100 and the fluid passage 401. The core tube 400 is provided with a first elongated hole 410 extending along the axial direction thereof; the valve plate 500 is rotatably coupled to the cylinder 100 by a rotation shaft 510 penetrating the first elongated hole 410; the control device 600 includes a first spring 650; one end of the first spring 650 is rotatably connected to the valve plate 500; the other end of the first spring 650 is rotatably coupled to the core tube 400.

The first spring 650 has a zigzag shape. The first spring 650 is formed by bending a wire and includes a first section 651, a second section 652, and a third section 653 connected in series. The connection position between the first and

second sections

651 and 652 is an arc shape, and the connection position between the second and

third sections

652 and 653 is also an arc shape. The first end 651 is rotatably coupled to the valve plate 500 and the third section 653 is rotatably coupled to the core tube 400.

In the process of switching the fluid isolation device 010 from the open state to the closed state, in the initial state, the fluid isolation device 010 is in the open state, the core tube 400 is located at the lowermost position (open position) with respect to the cylinder 100, the valve plate 500 is parallel to the axis of the core tube 400 at this time, the flow area of the fluid passage 401 is the largest, and the force-receiving area of the fluid isolation device 010 is the smallest. When the core tube 400 is subjected to an upward force, the core tube 400 moves upward with respect to the cylinder 100, and the first spring 650 pushes the valve plate 500 to rotate in the reverse direction (a direction in fig. 6a and 6 b), during which the valve plate 500 gradually reduces the flow area of the fluid passage 401. When the core tube 400 moves to the uppermost position (closed position) with respect to the cylinder 100, the valve plate 500 is perpendicular to the axis of the core tube 400, the valve plate 500 completely closes the fluid passage 401, the force-receiving area of the fluid separation device 010 is maximized, and the fluid separation device 010 is in a closed state. During the rotation of the valve plate 500, the first spring 650 is compressed, and when the valve plate 500 is perpendicular to the axis of the core tube 400, the first spring 650 is still compressed and applies an elastic force in the radial direction of the cylinder 100 to the valve plate 500, so that the valve plate 500 can be maintained in a state perpendicular to the axis of the core tube 400. Thus, the valve plate 500 is not easily rotated by the impact of the fluid, ensuring that the fluid is not easily passed through the fluid passage 401.

In the process of switching the fluid isolation device 010 from the closed state to the open state, in the initial state, the fluid isolation device 010 is in the open state, the core tube 400 is located at the uppermost position (the closed position) with respect to the cylinder 100, the valve plate 500 is perpendicular to the axis of the core tube 400 at this time, the fluid passage 401 is completely closed, and the force-receiving area of the fluid isolation device 010 is the largest. When the core tube 400 is subjected to a downward force, the core tube 400 moves downward with respect to the cylinder 100, and the first spring 650 pushes the valve plate 500 to rotate in a forward direction (direction B in fig. 6a and 6B), during which the valve plate 500 gradually increases the flow area of the fluid passage 401. When the core tube 400 moves to the lowermost position (open position) with respect to the cylinder body 100, the valve plate 500 is parallel to the axis of the core tube 400, the flow area of the fluid passage 401 is the largest, the force-receiving area of the fluid partitioning device 010 is the smallest, and the fluid partitioning device 010 is in the open state.

Referring to fig. 7a and 7b, the present embodiment further provides a hoistway structure 020. The well structure 020 includes a well 201, an upper collision device 202 and a lower collision device 203 respectively disposed at upper and lower ends of the well 201, and a fluid separation device 010 provided in this embodiment. The fluid separation device 010 is provided in the well 201 and is slidable in the axial direction of the well 201. Fig. 7a is a schematic structural diagram of the fluid separation device 010 moving to the lower end of the hoistway 201 and after the core tube 400 and the lower striking device 203 have struck, at this time, the core tube 400 is located at the closed position, and the fluid separation device 010 is in the closed state. Fig. 7b is a schematic diagram of the structure of the fluid separation device 010 moving to the upper end of the well 201 and the core tube 400 colliding with the upper collision device 202, wherein the core tube 400 is at the open position and the fluid separation device 010 is in the open state.

When the fluid separation device 010 moves to the lower end of the well 201 and the core tube 400 collides with the lower collision device 203, the core tube 400 moves upward relative to the cylinder 100, the first spring 650 pushes the valve plate 500 to rotate reversely, and the valve plate 500 gradually reduces the flow area of the fluid passage 401 during the rotation. When the core tube 400 moves to the uppermost position (closed position) with respect to the cylinder 100, the valve plate 500 is perpendicular to the axis of the core tube 400, the valve plate 500 completely closes the fluid passage 401, the force-receiving area of the fluid separation device 010 is maximized, and the fluid separation device 010 is in a closed state. At this time, the fluid below the fluid isolation device 010 is difficult to flow to the upper side of the fluid isolation device 010, and the fluid pressure below the fluid isolation device 010 completely acts on the fluid isolation device 010, thereby driving the fluid isolation device 010 to move upwards. During the upward movement of the fluid isolation device 010, the accumulated fluid above the fluid isolation device 010 is lifted upwards and discharged through the wellhead. In this process, the first elastic member 300 makes the spacer 200 contact with the inner wall of the well 201, so that a gap between the fluid separation device 010 and the well 201 is eliminated, the thrust force applied to the fluid separation device 010 is further increased, and the upward velocity of the fluid separation device 010 is increased.

When the fluid separation device 010 moves to the upper end of the well 201 and the core tube 400 collides with the upper collision device 202, the core tube 400 moves downward relative to the cylinder 100, the first spring 650 pushes the valve plate 500 to rotate forward, and the valve plate 500 gradually increases the flow area of the fluid passage 401 during the rotation. When the core tube 400 moves to the lowermost position (open position) with respect to the cylinder body 100, the valve plate 500 is parallel to the axis of the core tube 400, the flow area of the fluid passage 401 is the largest, the force-receiving area of the fluid partitioning device 010 is the smallest, and the fluid partitioning device 010 is in the open state. At this time, the fluid below the fluid separation device 010 flows to above the fluid separation device 010 through the fluid channel 401. The fluid separation device 010 is basically only under the action of fluid viscosity resistance and end face thrust, and the fluid separation device 010 is very small in stress, so that the fluid separation device 010 can quickly descend to the bottom of a well under the condition of not closing the well, and the oil or natural gas exploitation efficiency is greatly improved.

During the descending process of the fluid separation device 010, if the spacer 200 is continuously in contact with the inner wall of the well 201, the friction force between the spacer 200 and the inner wall of the well 201 will slow down the descending speed of the fluid separation device 010, and will make the spacer 200 be worn more quickly, resulting in poor sealing when the fluid separation device 010 ascends, and reducing the service life of the fluid separation device 010. To overcome this problem, in the present embodiment, the fluid separation device 010 further includes a spindle 700; the mandrel 700 is connected to the core tube 400 and extends axially along the barrel 100; the cylinder 100 is provided with a through hole 110; the partition 200 is slidably fitted with the through-hole 110. The first elastic member 300 is a spring. One end of the first elastic member 300 is rotatably connected with the partitioning member 200; the other end of the first elastic member 300 is rotatably engaged with the spindle 700; when the core tube 400 is in the closed position, the first elastic member 300 is compressed and drives the partitioning member 200 to move radially outward; when the core tube 400 is in the open position, the first elastic member 300 is stretched and causes the partitioning member 200 to move radially inward. Thus, friction between the partition 200 and the inner wall of the hoistway 201 is eliminated, and the fluid below the fluid separation device 010 can flow upward through the annular gap, so that the downward resistance of the fluid separation device 010 is further reduced, the partition 200 is not easily worn, and the service life of the fluid separation device 010 is prolonged. In the present embodiment, when the fluid separation device 010 moves to the upper end of the hoistway 201, the upper end of the core pipe 400 collides with the upper collision device 202; when the fluid separation device 010 moves to the lower end of the hoistway 201, the lower end of the mandrel 700 collides with the lower collision device 203, that is, the core tube 400 indirectly collides with the lower collision device 203 through the mandrel 700.

Further, referring to fig. 8, fig. 8 is a schematic structural diagram of the separator 200 in the present embodiment. In this embodiment, the partitioning member 200 includes an arc-shaped partition plate 210, and a connecting piece 220 connected to an intrados surface of the partition plate 210; the first elastic member 300 is rotatably coupled to the coupling piece 220. As such, the connection between the first elastic member 300 and the partitioning member 200 is made easier, and the manufacturing of the partitioning member 200 is also made simpler.

Further, in order to avoid the core tube 400 moving to the closed position during the downward movement of the fluid separation device 010, in the embodiment, referring to fig. 9, a positioning ring 120 is disposed in the cylinder 100; the positioning ring 120 is provided with a first clamping portion 121; one end of the core tube 400 is provided with a second clamping part 420 detachably clamped with the first clamping part 121; when the core tube 400 is located at the open position, the first catching portion 121 catches the second catching portion 420. Thus, when the fluid isolation device 010 moves downward, the core tube 400 can be effectively maintained at the open position, and the working stability of the fluid isolation device 010 is improved. Only when the core tube 400 is impacted, the first catching portions 121 and the second catching portions 420 are separated from each other, and the core tube 400 can move to the closed position. Specifically, the first engaging portion 121 includes two protrusions oppositely spaced from each other, and the second engaging portion 420 is a groove formed at the lower end of the core tube 400. In the process of embedding the first clamping portion 121 into the second clamping portion 420, the two protruding portions are firstly compressed, and the distance between the two protruding portions is shortened. Along with the inside motion of first joint portion 121 to second joint portion 420, two bellyings reset and keep away from each other under the effect of self elasticity, and then make and realize effective joint between first joint portion 121 and the second joint portion 420.

Example 5:

the present embodiment provides a method for producing oil or natural gas, which is implemented based on the well structure 020 according to any one of embodiments 1 to 4, the method including: when the fluid isolation device 010 moves downward, the outlet of the hoistway 201 is opened.

In the descending process of the fluid separation device provided in the related art, a large friction force exists between the separation piece and the inner wall of the well, and oil or natural gas flows upwards below the fluid separation device to apply an upward thrust to the fluid separation device. Under the combined action of the friction force, the upward thrust force and the self fluid resistance of the oil or the natural gas, the fluid separation device descends slowly or even cannot descend at all. In order to enable the fast flow divider to descend or increase the descending speed of the flow divider, in the related art, when the flow divider descends, the outlet of the well needs to be closed, and the pressure above and below the flow divider needs to be balanced, so that the oil or the natural gas does not flow upwards any more. In this way, the upward thrust on the fluid separation means is eliminated, which is only acted on by friction and the fluid resistance of the oil or gas itself during the downward movement. Only in such a case can the flow divider descend, or at a slightly higher speed, but its descending speed is still slow. In addition, the well needs to be closed when the fluid separation device descends, so that the production of oil or natural gas is completely stopped when the fluid separation device descends, and the production efficiency is greatly reduced.

According to the method for producing oil or natural gas provided by this embodiment, when the fluid separation device 010 moves downward, friction between the separator 200 and the inner wall of the well 201 is eliminated, and oil or natural gas below the fluid separation device 010 can flow upward through the annular gap between the fluid separation device 010 and the well 400 and the fluid channel 401, so that the force-bearing area of the fluid separation device 010 is greatly reduced, the downward resistance of the fluid separation device 010 is greatly reduced, and further, in the downward movement process of the fluid separation device 010, even if the outlet of the well 400 is opened, the fluid separation device 010 can move downward quickly. Thus, when the fluid separation device 010 moves downward, the oil or the natural gas can still be ejected from the outlet of the well 400, thereby realizing the continuous production of the oil or the natural gas and greatly improving the production efficiency.

The above description is only a partial example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Fluid separation device (010) configured to slide axially along a well (201) and lift a liquid charge upwards above said fluid separation device (010) during an upstroke, comprising:

a barrel (100);

a plurality of partitions (200) arranged about the axis of the barrel (100);

a first elastic member (300) connected to the partitioning member (200) and configured to apply an elastic force to the partitioning member (200) radially outward of the cylinder (100);

a core tube (400) slidably engaged with the cylinder (100) and configured to move back and forth between an open position and a closed position in an axial direction of the cylinder (100); the two ends of the core pipe (400) are open, and a fluid channel (401) is formed in the core pipe (400);

a valve plate (500) rotatably disposed within the fluid passage (401);

a control device (600) located within the fluid channel (401); wherein

When the fluid separation device (010) moves to the upper end of the well (201) and the core pipe (400) collides with an upper collision device (202) arranged at the upper end of the well (201), the core pipe (400) moves from the closed position to the open position, and in the process that the core pipe (400) moves from the closed position to the open position, the control device (600) drives the valve plate (500) to rotate forwards by a first preset angle and increases the flow area of the fluid channel (401); when the fluid separation device (010) moves to the lower end of the well (201) and the core pipe (400) collides with a lower collision device (203) arranged at the lower end of the well (201), the core pipe (400) moves from the opening position to the closing position, and in the process that the core pipe (400) moves from the opening position to the closing position, the control device (600) drives the valve plate (500) to reversely rotate by a second preset angle and reduces the flow area of the fluid channel (401).

2. The fluid separation device (010) of claim 1, characterized in that:

the valve plate (500) is rotatably connected with the core pipe (400) through a rotating shaft (510);

the core tube (400) is provided with a first elongated hole (410) extending axially;

the control device (600) comprises a link (610); one end of the connecting rod (610) is rotatably connected with the valve plate (500); the other end of the connecting rod (610) penetrates through the first long hole (410) and is rotatably connected with the cylinder body (100).

3. The fluid separation device (010) of claim 1, characterized in that:

the core tube (400) is provided with a first long hole (410) extending along the axial direction of the core tube;

the valve plate (500) is rotatably connected with the cylinder body (100) through a rotating shaft (510) penetrating through the first long hole (410);

the control device (600) comprises a link (610); one end of the connecting rod (610) is rotatably connected with the valve plate (500); the other end of the connecting rod (610) is rotatably connected with the core pipe (400).

4. The fluid separation device (010) of claim 1, characterized in that:

two opposite plate surfaces of the valve plate (500) are respectively provided with a first inclined surface (520) and a second inclined surface (530); the first inclined plane (520) and the second inclined plane (530) are positioned at two sides of the rotating shaft (510);

the control device (600) comprises a first convex body (620) and a second convex body (630) which are arranged on the inner wall of the core pipe (400);

in the process that the core tube (400) moves from the closed position to the open position, firstly, the second inclined surface (530) is separated from the second convex body (630), then the first convex body (620) is in contact with the plate surface of the valve plate (500), and drives the valve plate (500) to rotate forwards by a first preset angle;

in the process that the core tube (400) moves from the opening position to the closing position, firstly, the first convex body (620) is in contact with the first inclined surface (520) and drives the valve plate (500) to reversely rotate for a third preset angle, and then the second convex body (630) is in contact with the second inclined surface (530) and continues to drive the valve plate (500) to reversely rotate for a fourth preset angle; the sum of the third preset angle and the fourth preset angle is equal to the second preset angle.

5. The fluid separation device (010) of claim 1, characterized in that:

the valve plate (500) is rotatably connected with the core pipe (400) through a rotating shaft (510); two opposite plate surfaces of the valve plate (500) are respectively provided with a first inclined surface (520) and a second inclined surface (530); the first inclined plane (520) and the second inclined plane (530) are positioned at two sides of the rotating shaft (510);

the core tube (400) is provided with a first long hole (410) extending along the axial direction of the core tube; the control device (600) comprises a first convex body (620) and a second convex body (630) which respectively penetrate through the first elongated hole (410) and are connected with the cylinder body (100);

6. The fluid separation device (010) of claim 1, characterized in that:

a first inclined plane (520) and a second inclined plane (530) which are opposite to each other are arranged on one plate surface of the valve plate (500); the first inclined plane (520) and the second inclined plane (530) are positioned at two sides of the rotating shaft (510);

the control device (600) comprises a first convex body (620), a second convex body (630) and a third convex body (640) which are arranged on the inner wall of the core pipe;

in the process that the core tube (400) moves from the closed position to the open position, firstly, the valve plate (500) is separated from the third convex body (640), then the first convex body (620) is contacted with the first inclined surface (520), and drives the valve plate (500) to rotate forwards by a first preset angle;

in the process that the core tube (400) moves from the opening position to the closing position, firstly, the second convex body (630) is in contact with the second inclined surface (530) and drives the valve plate (500) to reversely rotate by a third preset angle; then the third convex body (640) is contacted with the other plate surface of the valve plate (500), and the valve plate (500) is continuously driven to reversely rotate by a fourth preset angle; the sum of the third preset angle and the fourth preset angle is equal to the second preset angle.

7. The fluid separation device (010) of claim 1, characterized in that:

the valve plate (500) is rotatably connected with the core pipe (400) through a rotating shaft (510); a first inclined plane (520) and a second inclined plane (530) which are opposite to each other are arranged on one plate surface of the valve plate (500); the first inclined plane (520) and the second inclined plane (530) are positioned at two sides of the rotating shaft (510);

the core tube (400) is provided with a first long hole (410) extending along the axial direction of the core tube; the control device (600) comprises a first convex body (620), a second convex body (630) and a third convex body (640) which respectively penetrate through the first elongated hole (410) and are connected with the cylinder body (100);

8. The fluid separation device (010) of claim 1, characterized in that:

the control device (600) comprises a first spring (650); one end of the first spring (650) is rotatably connected with the valve plate (500); the other end of the first spring (650) is rotatably connected to the core tube (400).

9. The fluid separation device (010) of claim 8, characterized in that:

the fluid separation device (010) further comprises a mandrel (700); the mandrel (700) is connected with the core tube (400) and extends along the axial direction of the cylinder body (100); a through hole (110) is formed in the cylinder body (100); the spacer (200) is slidably engaged with the through-hole (110); one end of the first elastic member (300) is rotatably connected with the partitioning member (200); the other end of the first elastic piece (300) is rotatably matched with the mandrel (700);

when the core tube (400) is in the closed position, the first elastic member (300) is compressed and drives the partitioning member (200) to move radially outward; when the core tube (400) is in the open position, the first resilient member (300) is stretched and causes the partition member (200) to move radially inwardly.

10. Fluid separation device (010) according to claim 9, characterized in that:

the separator (200) comprises an arc-shaped separator (210) and a connecting piece (220) connected to the intrados of the separator (210); the first elastic member (300) is rotatably connected with the connecting piece (220).

11. Fluid separation device (010) according to claim 8, characterized in that

A positioning ring (120) is arranged in the cylinder body (100); the positioning ring (120) is provided with a first clamping part (121); one end of the core tube (400) is provided with a second clamping part (420) which is detachably clamped with the first clamping part (121); when the core tube (400) is located at the opening position, the first clamping portion (121) is clamped with the second clamping portion (420).

12. The fluid separation device (010) of claim 1, characterized in that:

a first positioning space (810) and a second positioning space (820) are arranged on the core pipe (400), and the barrel body (100) is connected with a positioning block (840) through an elastic reset piece (830); or a first positioning space (810) and a second positioning space (820) are arranged on the cylinder body (100), and the core pipe (400) is connected with a positioning block (840) through an elastic resetting piece (830);

when the core tube (400) is located at the open position, the positioning block (840) is embedded into the first positioning space (810) under the action of the elastic resetting piece (830); when the core tube (400) is located at the closed position, the positioning block (840) is embedded into the second positioning space (820) under the action of the elastic resetting piece (830).

13. The fluid separation device (010) of claim 1, characterized in that:

the fluid separation device (010) further comprises a guide device (900) penetrating through the cylinder body (100), one end of the guide device is connected with the separation piece (200), and the other end of the guide device is slidably matched with the core pipe (400) through a matching surface (850); wherein

The mating surface (850) extends gradually radially outward relative to the cartridge (100) in a direction from the closed position to the open position; when the core tube (400) moves to the open position, the guide means (900) carries the partition (200) radially inwards relative to the barrel (100); when the core tube (400) moves towards the closed position, the first elastic member drives the separating member (200) to move radially outwards relative to the cylinder body (100).

14. A hoistway structure (020), characterized by:

comprising a hoistway (201), an upper impact device (202) and a lower impact device (203) arranged at the upper and lower ends of the hoistway (201), respectively, and a fluid separation device (010) according to any of claims 1-13;

the fluid separation device (010) is disposed within the hoistway (201) and configured to slide axially along the hoistway (201); the core tube (400) moves to the open position when the core tube (400) collides with the upper striking device (202), and the core tube (400) moves to the closed position when the core tube (400) collides with the lower striking device (203).

15. A method for producing oil or gas, characterized in that it is implemented on the basis of a well structure (020) according to claim 14, comprising:

when the fluid separation device (010) descends, an outlet of the well (201) is opened.