CN108825172B - Unpowered sleeve gas recovery device - Google Patents
Unpowered sleeve gas recovery device Download PDFInfo
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- CN108825172B CN108825172B CN201810993747.XA CN201810993747A CN108825172B CN 108825172 B CN108825172 B CN 108825172B CN 201810993747 A CN201810993747 A CN 201810993747A CN 108825172 B CN108825172 B CN 108825172B
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- rod
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- cylinder barrel
- intermediate body
- push rod
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
Abstract
The unpowered sleeve gas recovery device comprises a first cylinder barrel, a middle body and a second cylinder barrel which are connected, wherein a piston rod is arranged in the first cylinder barrel, the middle body and the second cylinder barrel, and the two ends of the piston rod are provided with a first piston and a second piston; an air inlet channel is arranged on the intermediate body, a first check valve for controlling sleeve gas to enter the rod cavity of the first cylinder barrel is arranged in the air inlet channel, and a second check valve for controlling sleeve gas in the rod cavity of the first cylinder barrel to be discharged is arranged in the air outlet channel; the middle body is provided with a balance air passage with an air filter; a ball valve is connected between the ends of the first cylinder and the second cylinder, which are far away from the intermediate, and a third check valve is used for controlling crude oil in the oil well to flow into an oil delivery pipe network; the ball valve rod is provided with a connecting rod with a gear; the middle body is provided with a jack at the position corresponding to the ball valve; a push rod is arranged in the middle body in a penetrating way, and a rack is arranged in the middle of the push rod along the length direction of the push rod; the end of the connecting rod, which is far away from the valve rod, is positioned in the middle body through the jack, and the gear is positioned at the inner section of the jack and meshed with the rack. The device can effectively recycle the casing gas.
Description
Technical Field
The invention relates to an unpowered sleeve gas recovery device.
Background
At present, when crude oil is extracted, an oil pumping unit is communicated with an oil well through an oil pumping pipe and a sleeve which are sleeved and connected inside and outside and extend downwards, and an annular space is formed between the oil pumping pipe and the sleeve; in the process of crude oil extraction, along with the output of crude oil in an oil well, part of associated gas (commonly known as casing gas or wellhead natural gas) can be stored in the annular space, the pressure of the casing gas is increased along with the increase of the output of the crude oil, so that the output of the crude oil is reduced, and the oil pump of the oil pumping unit can generate an air lock phenomenon to influence the pumping efficiency in severe cases.
Typically, for most domestic wells, the crude oil pressure in the tubing is 0.3-0.8mpa and the casing gas pressure in the annulus is 0.15-0.20mpa.
One of the methods for treating the casing gas is to regularly "blow out", and the direct discharge of the casing gas can seriously pollute the atmosphere, the pollution degree is 21 times of that of carbon dioxide, the ozone layer is seriously destroyed, a phenomenon of "cavity" is caused, and the physical health of surrounding residents is also influenced.
The casing gas contains a large amount of hydrogen sulfide, and the concentration of the hydrogen sulfide is more than 600mg/m in the gas using process 3 When the outdoor heating system is used, the life of a person can be endangered, and for workers on duty at night, sleeve gas is used for heating, and potential safety hazards can be buried slightly without attention.
The rural areas in China have accidents such as casualties, house explosion and the like every year due to improper use of casing gas.
The venting of casing gas is also a serious waste of valuable resources today where resources are scarce.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an unpowered sleeve gas recycling device capable of effectively recycling sleeve gas.
The invention adopts the following technical scheme:
the unpowered sleeve gas recovery device comprises a first cylinder barrel, a middle body and a second cylinder barrel which are sequentially connected in a concentric manner, wherein a piston rod is concentrically arranged in the first cylinder barrel, the middle body and the second cylinder barrel in a penetrating manner, and a first piston and a second piston which are sequentially in sliding fit with the first cylinder barrel and the second cylinder barrel are concentrically arranged at two ends of the piston rod;
an air inlet channel and an air outlet channel which are communicated with the rod cavity of the first cylinder barrel are arranged on the intermediate body at intervals along the circumferential direction of the intermediate body at positions corresponding to the first cylinder barrel, a first check valve used for controlling sleeve gas to enter the rod cavity of the first cylinder barrel is arranged in the air inlet channel, and a second check valve used for controlling sleeve gas in the rod cavity of the first cylinder barrel to be discharged is arranged in the air outlet channel;
the middle body is provided with a balance air passage which is communicated with the rod cavity of the second cylinder at a position corresponding to the second cylinder, and the side of the balance air passage far away from the rod cavity of the second cylinder is provided with an air filter which ensures that the atmosphere is communicated with the rod cavity of the second cylinder;
the end of the first cylinder barrel far away from the intermediate body and the end of the second cylinder barrel far away from the intermediate body are provided with ball valves and third check valves in a bridging communication mode, wherein the ball valves and the third check valves are communicated in sequence, and the third check valves are used for controlling crude oil in an oil well to flow into an oil transportation pipe network;
the ball valve is close to the intermediate body, the central lines of the ball valve and the intermediate body are parallel, a connecting rod which is coaxial with the valve rod and extends to the intermediate body and round is connected to the valve rod of the ball valve, and a gear which is coaxial with the connecting rod is arranged on the side, away from the valve rod, of the connecting rod;
the middle body is provided with a jack for inserting a gear and a connecting rod at the position corresponding to the ball valve, the jack is a counter bore, and the outer opening of the jack is positioned at the corresponding side of the middle body, which is close to the ball valve;
a push rod which is in sliding fit with the middle body is arranged in the middle body at a position corresponding to the inner section of the jack, the central line of the push rod is parallel to the central line of the piston rod, and two ends of the push rod extend out of the middle body at equal distance respectively;
the inner position of the intermediate body is respectively provided with a strip-shaped perforation communicated with the inner section of the jack along the axial direction of the intermediate body at the positions corresponding to the middle part of the push rod and the inner section of the jack;
the middle part of the push rod is provided with a rack along the length direction, and the specification of the rack enables teeth on the rack to extend into the inner section of the jack;
the end of the connecting rod, which is far away from the valve rod, is positioned in the middle body through the jack, the gear is arranged at the inner section of the jack and meshed with the rack, and the axial length of the through hole ensures that the corresponding end of the push rod can enter the middle body when the rack moves back and forth along the through hole;
when the device works, the first piston moves towards the direction close to the intermediate body, the second piston moves towards the end, away from the intermediate body, of the second cylinder, when the first piston pushes the push rod, the push rod drives the rack to move towards the direction close to the second piston along the perforation, the rack drives the gear, the connecting rod and the valve rod to rotate positively, so that the first piston and the intermediate body are in a contact state, the end, away from the second piston, of the push rod enters the intermediate body, and the ball valve is in an open state; or:
the second piston moves towards the direction close to the intermediate body, the first piston moves towards the end, away from the intermediate body, of the first cylinder barrel, when the second piston pushes the push rod, the push rod drives the rack to move towards the direction close to the first piston along the through hole, the rack drives the gear, the connecting rod and the valve rod to reversely rotate, so that the second piston is in a contact state with the intermediate body, the end, away from the first piston, of the push rod enters the intermediate body, and the ball valve is in a closed state.
For the sake of brevity, the unpowered sleeve gas recovery device is hereinafter simply referred to as the device.
When the device is used, the end of the first cylinder barrel far away from the intermediate body is communicated with a crude oil outlet of the oil pumping unit, the air is ensured to be communicated with a rod cavity of the second cylinder barrel through an air filter and a balance air passage, the air inlet passage is communicated with the sleeve pipe through a first pipeline, the air outlet passage is communicated with an oil delivery pipe network through a second pipeline (the two communication modes can be that the air outlet passage is communicated with the air outlet end of the third check valve through the second pipeline, or the air outlet passage is directly communicated with the end of the second cylinder barrel far away from the intermediate body through the second pipeline), and the end of the second cylinder barrel far away from the intermediate body is communicated with the oil delivery pipe network (namely, the rod-free cavity of the second cylinder barrel is communicated with the oil delivery pipe network), so that the device is arranged between the oil pumping unit and the oil delivery pipe network; the sleeve gas in the annular space between the oil suction pipe and the sleeve continuously and automatically enters the rod cavity of the first cylinder barrel through the first pipeline, the air inlet passage and the first check valve.
The working steps of the device are as follows:
1) When the oil pumping unit is in an upward direction, crude oil pumped up from the oil well flows into the rodless cavity of the first cylinder barrel through the crude oil outlet of the oil pumping unit, and at the moment, the crude oil with pressure pushes the first piston to move towards a direction close to the intermediate body (the ball valve is in a closed state); the sleeve gas in the rod cavity of the first cylinder barrel is pressed into an oil transportation pipe network through the gas outlet channel, the second check valve and the second pipeline under the action of the first piston, and the sleeve gas can be conveyed to a joint station for centralized treatment; when the first piston pushes the push rod, the push rod drives the rack to move along the perforation towards the direction close to the second piston, the rack drives the gear, the connecting rod and the valve rod to rotate positively, so that the first piston and the intermediate are in a contact state, the end, away from the second piston, of the push rod enters the intermediate, the ball valve is in an open state, and crude oil enters an oil transportation pipe network through the ball valve and the third check valve;
2) When the pumping action is completed and the pumping unit descends, the pressure of crude oil at the crude oil outlet of the pumping unit is reduced (the volume of a cavity generated in the pumping pipe is larger than that of a rodless cavity of the first cylinder barrel); the crude oil in the oil transportation pipe network has higher pressure, the casing gas in the oil transportation pipe network is in an expansion state (the third check valve is in a closed state, and the pressure reverse difference between the crude oil in the oil transportation pipe network and the crude oil at the crude oil outlet is larger), so that the crude oil in the oil transportation pipe network flows back and generates a water hammer phenomenon; the sleeve gas in the annular space between the oil suction pipe and the sleeve continuously enters a rod cavity of the first cylinder barrel through the first pipeline, the air inlet channel and the first check valve, and the rod cavity of the second cylinder barrel is communicated with the atmosphere; the crude oil flows back to push the second piston to move towards the direction approaching the intermediate body (the volume of the rod cavity of the second cylinder barrel is reduced), the second piston pushes the first piston by virtue of the piston rod, and in addition, the corresponding sleeve gas entering the rod cavity of the first cylinder barrel directly pushes the first piston, so that under the combined action of the flowing back crude oil and the corresponding sleeve gas entering the rod cavity of the first cylinder barrel, the first piston moves towards the end of the first cylinder barrel far away from the intermediate body, and when the second piston pushes the push rod, the push rod drives the rack to move towards the direction approaching the first piston along the perforation, and the rack drives the gear, the connection rod and the valve rod to reversely rotate, so that the second piston is in a contact state with the intermediate body, and the end of the push rod far away from the first piston enters the intermediate body and the ball valve is in a closed state;
3) Repeating steps 1), 2) a plurality of times.
Therefore, the working process of the device does not need electric power or other control devices, the problem of safe recovery of casing gas in the annular space between the oil pumping pipe and the casing can be effectively solved, the phenomenon of air lock of an oil pump of the oil pumping unit is avoided, and the oil well yield is effectively improved.
After adopting above technical scheme, compare with the background art, this device's advantage is:
the device can effectively recycle the casing gas, and realize the effects of saving energy, protecting environment and improving the benefit of the oil well.
Further, a plurality of first Y-shaped sealing rings which are coaxial with the middle body and are used for sealing the outer wall of the piston rod are arranged in the middle body; and a plurality of second Y-shaped sealing rings which are parallel to the central line of the middle body and used for sealing the outer wall of the push rod are also arranged in the middle body.
The arrangement of the first Y-shaped sealing ring and the second Y-shaped sealing ring can improve the air tightness and ensure that the rod cavity of the first cylinder barrel, the intermediate body and the rod cavity of the second cylinder barrel are in an air-tight sealing state which is not communicated with each other in the axial direction.
Preferably, the first check valve and the second check valve adopt annular air valves, and the third check valve adopts spring type check valves or lifting type check valves.
Therefore, the device has simple and reasonable structure and can ensure the normal use of the device.
Drawings
FIG. 1 is a schematic view of the structure and operation of the present device;
FIG. 2 is a left side view of the present device;
FIG. 3 is an enlarged top view of the present device;
FIG. 4 is an enlarged cross-sectional view of A-A of FIG. 1;
FIG. 5 is an enlarged cross-sectional view of B-B of FIG. 4;
fig. 6 is a partial enlarged view of the portion D in fig. 4.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the attached drawing figures:
see fig. 1-6:
as known from the background art, when the crude oil is extracted, the pumping unit C is communicated with the oil well J through the pumping pipe C1 and the casing C2 which are sleeved and connected inside and outside and extend downwards, and an annular space is formed between the pumping pipe C1 and the casing C2.
The device comprises a first cylinder barrel 1, a middle body 2 and a second cylinder barrel 3 which are connected with each other by a central line in sequence, wherein a piston rod 4 is arranged in the first cylinder barrel, the middle body and the second cylinder barrel in a penetrating way by the central line in a penetrating way.
Six first Y-shaped sealing rings 2k which are coaxial with the intermediate body 2 and are used for sealing the outer wall of the piston rod 4 are arranged in the intermediate body, wherein: three first Y-shaped seal rings 2k are located at one axial side in the intermediate body 2 and the first Y-shaped seal rings 2k are axially spaced apart from each other, and the other three first Y-shaped seal rings 2k are located at the other axial side in the intermediate body 2 and the first Y-shaped seal rings 2k are axially spaced apart from each other.
The two ends of the piston rod 4 are concentrically provided with a first piston 5 and a second piston 6 which are sequentially in sliding fit with the first cylinder barrel 1 and the second cylinder barrel 3; the first piston 5 is provided with a Y-shaped sealing ring and a supporting ring (corresponding part numbers are not marked in the drawing), so that the rod cavity 1a of the first cylinder barrel 1 and the rod-free cavity 1b of the first cylinder barrel 1 can be prevented from being communicated; the second piston 6 is provided with a Y-shaped sealing ring and a supporting ring (corresponding part numbers are not marked in the drawing) so as to prevent the rod cavity 3a of the second cylinder 3 and the rod-free cavity 3b of the second cylinder 3 from being communicated.
The intermediate body 2 is provided with an air inlet channel 2a and an air outlet channel 2C which are communicated with a rod cavity 1a of the first cylinder 1 at intervals along the circumferential direction of the intermediate body 2 at positions corresponding to the first cylinder 1, a first check valve 2b (the sleeve gas is the sleeve gas in an annular space between the oil pumping pipe C1 and the sleeve C2) for controlling sleeve gas to enter the rod cavity 1a of the first cylinder 1 is arranged in the air inlet channel 2a, and a second check valve 2d for controlling sleeve gas in the rod cavity 1a of the first cylinder 1 to be discharged is arranged in the air outlet channel 2C.
The middle body 2 is provided with a balance air passage 2e which is communicated with the rod cavity 3a of the second cylinder 3 at a position corresponding to the second cylinder 3, and the side of the balance air passage 2e away from the rod cavity 3a of the second cylinder 3 is provided with an air filter 2f which ensures that the atmosphere is communicated with the rod cavity 3a of the second cylinder 3.
The end of the first cylinder barrel 1 far away from the intermediate body 2 and the end of the second cylinder barrel 3 far away from the intermediate body 2 are provided with a ball valve 7 and a third check valve 8 used for controlling crude oil in an oil well J to flow into an oil transportation pipe network W in a bridging communication mode (namely, a parallel connection mode), the ball valve 7 and the third check valve 8 are communicated in sequence, and the ball valve 7 and the third check valve 8 are positioned above the front sides of the first cylinder barrel 1, the intermediate body 2 and the second cylinder barrel 3.
The ball valve 7 is close to the intermediate body 2 and the central lines of the ball valve 7 and the intermediate body 2 are parallel, a valve rod 7a of the ball valve 7 is connected with a connecting rod 7b which is concentric with the valve rod 7a and vertically extends downwards to the intermediate body 2, a gear 7c concentric with the connecting rod 7b is arranged on the lower side of the connecting rod 7b, which is far away from the valve rod 7a, and a cover plate 2n higher than the gear 7c is sleeved on the lower side of the connecting rod 7b, which is far away from the valve rod 7 a.
The front part of the intermediate body 2 is provided with a jack 2g for inserting a gear 7c and a connecting rod 7b at a position corresponding to the ball valve 7, the jack 2g is a counter bore which is vertically downwards arranged, and the outside of the jack is open and positioned on the upper side of the intermediate body 2.
The middle body 2 is internally provided with a push rod 2h in sliding fit with the middle body 2 at a position corresponding to the inner section of the jack 2g, the central line of the push rod 2h is parallel and coplanar with the central line of the piston rod 4, the length of the push rod 2h is longer than that of the middle body 2, two ends of the push rod 2h respectively extend out of the middle body 2 at equal intervals (namely, the extending lengths of the two ends of the push rod 2h are the same), and the middle part of the push rod 2h is provided with an axially extending concave 2r. Six second Y-shaped sealing rings 2m which are parallel to the central line of the intermediate body 2 and are used for sealing the outer wall of the push rod 2h are arranged in the intermediate body.
The middle part of the push rod 2h and the inner section of the jack 2g are respectively arranged at the inner position of the intermediate body 2 along the axial direction of the intermediate body, and are horizontally arranged with strip-shaped perforations 2i communicated with the inner section of the jack 2g, wherein the axial length of each perforation 2i is greater than the extending length of any end of the push rod 2h, and the axial length of each perforation 2i is 3.3 times of the extending length.
The middle part of the front side of the intermediate body 2 is provided with a mounting hole 2p which is communicated with the inner section of the jack 2g and is used for mounting the rack 2j at a position corresponding to the inner section of the jack 2g, the mounting hole 2p is a rectangular hole which is horizontally arranged, and the outer side of the mounting hole 2p is open and positioned at the front side of the intermediate body 2, so that the mounting hole 2p, the jack 2g and the through hole 2i are sequentially communicated front and back.
The rack 2j is clamped into the concave 2r through the mounting hole 2p, the inner section of the jack 2g and the perforation 2i in sequence and is connected with the middle part of the push rod 2h through a fastener, the middle part of the push rod 2h is provided with the rack 2j along the length direction of the rack 2h, and the specification of the rack 2j enables teeth on the rack to extend into the inner section of the jack 2 g.
The end of the connecting rod 7b far away from the valve rod 7a is seated in the intermediate body 2 through the jack 2g, the gear 7c is arranged at the inner section of the jack 2g and meshed with the rack 2j, and the axial length of the through hole 2i ensures that the corresponding end of the push rod 2h can enter the intermediate body 2 when the rack 2j moves back and forth along the through hole 2 i; the cover plate 2n is horizontally attached to the outside of the insertion hole 2g by a fastener to close the outside opening of the insertion hole 2 g. The structure ensures that the connecting rod 7b always keeps vertical and stable and reliable rotation.
The closing plate 2q is mounted in the middle of the front side of the intermediate body 2 by a fastener and closes the outside opening of the mounting hole 2 p.
When the device works, the first piston 5 moves towards the direction close to the intermediate body 2, the second piston 6 moves towards the end of the second cylinder 3 far away from the intermediate body 2, when the first piston 5 pushes the push rod 2h, the push rod 2h drives the rack 2j to move towards the direction close to the second piston 6 along the perforation 2i, the rack 2j drives the gear 7c, the connecting rod 7b and the valve rod 7a to rotate positively, so that the first piston 5 and the intermediate body 2 are in a contact state, the end of the push rod 2h far away from the second piston 6 enters the intermediate body 2, and the ball valve 7 is in an open state; or:
when the second piston 6 moves towards the direction close to the intermediate body 2 and the first piston 5 moves towards the end of the first cylinder barrel 1 far away from the intermediate body 2, the push rod 2h drives the rack 2j to move towards the direction close to the first piston 5 along the through hole 2i, the rack 2j drives the gear 7c, the connecting rod 7b and the valve rod 7a to reversely rotate, so that the second piston 6 is in contact with the intermediate body 2, the end of the push rod 2h far away from the first piston 5 enters the intermediate body 2, and the ball valve 7 is in a closed state.
The first check valve 2b and the second check valve 2d are annular air valves, and the third check valve 8 is a spring type check valve. The air filter 2f is part of the prior art.
When the device is used, the end of the first cylinder barrel 1 far away from the intermediate body 2 is communicated with a crude oil outlet of the oil pumping unit C, the air filter 2f and the balance air passage 2e ensure that the atmosphere is communicated with a rod cavity 3a of the second cylinder barrel 3, the air inlet passage 2a is communicated with the sleeve C2 through a first pipeline L1, the air outlet passage 2C is communicated with the air outlet end of the third check valve 8 through a second pipeline L2, the air outlet passage 2C is communicated with the oil delivery pipe network W through the second pipeline L2, and the end of the second cylinder barrel 3 far away from the intermediate body 2 is communicated with the oil delivery pipe network W (namely, the rodless cavity 3b of the second cylinder barrel 3 is communicated with the oil delivery pipe network W), so that the device is arranged between the oil pumping unit C and the oil delivery pipe network W; the sleeve gas in the annular space between the oil suction pipe C1 and the sleeve C2 continuously and automatically enters the rod cavity 1a of the first cylinder 1 through the first pipeline L1, the air inlet channel 2a and the first check valve 2 b.
The working steps of the device are as follows:
1) When the oil pumping unit C is up, crude oil pumped up from the oil well J flows into the rodless cavity 1b of the first cylinder barrel 1 through the crude oil outlet of the oil pumping unit C, and at the moment, the crude oil with pressure pushes the first piston 5 to move towards the direction approaching the intermediate body 2 (the ball valve 7 is in a closed state); the sleeve gas in the rod cavity 1a of the first cylinder barrel 1 is pressed into the oil transportation pipe network W through the gas outlet channel 2c, the second check valve 2d and the second pipeline L2 under the action of the first piston 5, and the sleeve gas can be conveyed to a joint station for centralized treatment; when the first piston 5 pushes the second piston 6 by means of the piston rod 4, the second piston 6 moves towards the end of the second cylinder 3 far away from the intermediate body 2, when the first piston 5 pushes the push rod 2h, the push rod 2h drives the rack 2j to move along the perforation 2i towards the direction close to the second piston 6, the rack 2j drives the gear 7c, the connecting rod 7b and the valve rod 7a to rotate positively, so that the first piston 5 and the intermediate body 2 are in a contact state, the end of the push rod 2h far away from the second piston 6 enters the intermediate body 2, the ball valve 7 is in an open state, and crude oil enters the oil delivery pipe network W through the ball valve 7 and the third check valve 8;
2) When the pumping action is completed and the pumping unit C descends, the pressure of crude oil at the crude oil outlet of the pumping unit C is reduced (the volume of a cavity generated in the pumping pipe C1 is larger than that of the rodless cavity 1b of the first cylinder barrel 1); the crude oil pressure in the oil transportation pipe network W is higher, the casing gas in the oil transportation pipe network W is in an expansion state (the third check valve 8 is in a closed state, and the pressure reverse difference between the crude oil in the oil transportation pipe network W and the crude oil at the crude oil outlet is larger), so that the crude oil in the oil transportation pipe network W flows back and a 'water hammer' phenomenon is generated; the sleeve gas in the annular space between the oil suction pipe C1 and the sleeve C2 continuously enters the rod cavity 1a of the first cylinder barrel 1 through the first pipeline L1, the air inlet channel 2a and the first check valve 2b, and the rod cavity 3a of the second cylinder barrel 3 is communicated with the atmosphere; the crude oil flows back to push the second piston 6 to move towards the direction approaching the intermediate body 2 (the volume of the rod cavity 3a of the second cylinder barrel 3 is reduced), the second piston 6 pushes the first piston 5 by means of the piston rod 4, and the corresponding sleeve gas entering the rod cavity 1a of the first cylinder barrel 1 directly pushes the first piston 5, so that under the combined action of the flowing back crude oil and the corresponding sleeve gas entering the rod cavity 1a of the first cylinder barrel 1, the first piston 5 moves towards the end of the first cylinder barrel 1 far away from the intermediate body 2, when the second piston 6 pushes the push rod 2h, the push rod 2h drives the rack 2j to move towards the direction approaching the first piston 5 along the perforation 2i, the rack 2j drives the gear 7c, the connecting rod 7b and the valve rod 7a to reversely rotate, and the end of the push rod 2h far away from the first piston 5 enters the intermediate body 2 and the ball valve 7 is in a closed state;
3) Repeating steps 1), 2) a plurality of times.
Therefore, the working process of the device does not need electric power and other control devices, the problem of safe recovery of casing gas in the annular space between the oil pumping pipe C1 and the casing pipe C2 can be effectively solved, the phenomenon of air lock of an oil pump of the oil pumping machine C is avoided, and the yield of an oil well J is effectively improved.
In conclusion, the device can effectively recycle casing gas, and achieve the effects of saving energy, protecting environment and improving oil well benefits.
The device is applicable to a wider oil well range. Before the device is installed in the oil well, test: the pressure in the sleeve is 1.1Mpa, and the oil return pressure of the oil delivery pipe network is 0.45Mpa; after the device is installed in the oil well, the device is tested: the pressure in the sleeve is less than 0.4Mpa (the pressure in the sleeve is reduced by at least 0.7 Mpa), and the oil return pressure of the oil delivery pipe network has no obvious change. In addition, before and after the device is installed in the oil well, the working current of the oil pumping unit is stable. It is obvious that after the device is installed in the oil well, the working current of the oil pumping unit and the oil return pressure of the oil delivery pipe network are not obviously increased, and the device has small influence on the energy consumption of the oil pumping unit, and the daily recovery capacity of the casing gas is as follows: 10-400m 3 /d。
The above description is only one specific embodiment of the present invention, and it should be understood that it is not limited thereto, but is intended to cover modifications and variations of the present invention as those skilled in the art can readily devise without departing from the spirit and scope of the present invention. Such as:
the ball valve and the third check valve can also adopt the following structure, namely: the ball valve and the third check valve are positioned below the front sides of the first cylinder barrel, the middle body and the second cylinder barrel, the valve rod of the ball valve is connected with a connecting rod which is concentric with the valve rod and vertically extends upwards to the middle body and round, the upper side of the connecting rod, which is far away from the valve rod, is provided with a gear which is concentric with the connecting rod, the front part of the middle body is provided with a jack for inserting the gear and the connecting rod at a position corresponding to the ball valve, the jack is a counter bore which is vertically upwards arranged, and the outer side of the jack is open at the lower side of the middle body;
the air outlet channel is directly communicated with the end, far away from the intermediate, of the second cylinder through a second pipeline, and the air outlet channel can also be communicated with an oil transportation pipe network through the second pipeline;
the third check valve may also be a lifting check valve.
Claims (3)
1. Unpowered sleeve gas recovery device, its characterized in that:
the piston rod is arranged in the first cylinder barrel, the middle body and the second cylinder barrel in a penetrating way in a concentric way, and the two ends of the piston rod are provided with a first piston and a second piston which are in sliding fit with the first cylinder barrel and the second cylinder barrel in sequence in a concentric way;
an air inlet channel and an air outlet channel which are communicated with the rod cavity of the first cylinder barrel are arranged on the intermediate body at intervals along the circumferential direction of the intermediate body at positions corresponding to the first cylinder barrel, a first check valve used for controlling sleeve gas to enter the rod cavity of the first cylinder barrel is arranged in the air inlet channel, and a second check valve used for controlling sleeve gas in the rod cavity of the first cylinder barrel to be discharged is arranged in the air outlet channel;
the middle body is provided with a balance air passage which is communicated with the rod cavity of the second cylinder at a position corresponding to the second cylinder, and the side of the balance air passage far away from the rod cavity of the second cylinder is provided with an air filter which ensures that the atmosphere is communicated with the rod cavity of the second cylinder;
the end of the first cylinder barrel far away from the intermediate body and the end of the second cylinder barrel far away from the intermediate body are provided with ball valves and third check valves in a bridging communication mode, wherein the ball valves and the third check valves are communicated in sequence, and the third check valves are used for controlling crude oil in an oil well to flow into an oil transportation pipe network;
the ball valve is close to the intermediate body, the central lines of the ball valve and the intermediate body are parallel, a connecting rod which is coaxial with the valve rod and extends to the intermediate body and round is connected to the valve rod of the ball valve, and a gear which is coaxial with the connecting rod is arranged on the side, away from the valve rod, of the connecting rod;
the middle body is provided with a jack for inserting a gear and a connecting rod at the position corresponding to the ball valve, the jack is a counter bore, and the outer opening of the jack is positioned at the corresponding side of the middle body, which is close to the ball valve;
a push rod which is in sliding fit with the middle body is arranged in the middle body at a position corresponding to the inner section of the jack, the central line of the push rod is parallel to the central line of the piston rod, and two ends of the push rod extend out of the middle body at equal distance respectively;
the inner position of the intermediate body is respectively provided with a strip-shaped perforation communicated with the inner section of the jack along the axial direction of the intermediate body at the positions corresponding to the middle part of the push rod and the inner section of the jack;
the middle part of the push rod is provided with a rack along the length direction, and the specification of the rack enables teeth on the rack to extend into the inner section of the jack;
the end of the connecting rod, which is far away from the valve rod, is positioned in the middle body through the jack, the gear is arranged at the inner section of the jack and meshed with the rack, and the axial length of the through hole ensures that the corresponding end of the push rod can enter the middle body when the rack moves back and forth along the through hole;
when the device works, the first piston moves towards the direction close to the intermediate body, the second piston moves towards the end, away from the intermediate body, of the second cylinder, when the first piston pushes the push rod, the push rod drives the rack to move towards the direction close to the second piston along the perforation, the rack drives the gear, the connecting rod and the valve rod to rotate positively, so that the first piston and the intermediate body are in a contact state, the end, away from the second piston, of the push rod enters the intermediate body, and the ball valve is in an open state; or:
the second piston moves towards the direction close to the intermediate body, the first piston moves towards the end, away from the intermediate body, of the first cylinder barrel, when the second piston pushes the push rod, the push rod drives the rack to move towards the direction close to the first piston along the through hole, the rack drives the gear, the connecting rod and the valve rod to reversely rotate, so that the second piston is in a contact state with the intermediate body, the end, away from the first piston, of the push rod enters the intermediate body, and the ball valve is in a closed state.
2. The unpowered sleeve gas recovery device of claim 1, wherein:
a plurality of first Y-shaped sealing rings which are concentric with the middle body and are used for sealing the outer wall of the piston rod are arranged in the middle body;
and a plurality of second Y-shaped sealing rings which are parallel to the central line of the middle body and used for sealing the outer wall of the push rod are also arranged in the middle body.
3. The unpowered sleeve gas recovery device as defined in claim 1 or 2, wherein:
the first check valve and the second check valve adopt annular air valves, and the third check valve adopts spring check valves or lifting check valves.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810993747.XA CN108825172B (en) | 2018-08-29 | 2018-08-29 | Unpowered sleeve gas recovery device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810993747.XA CN108825172B (en) | 2018-08-29 | 2018-08-29 | Unpowered sleeve gas recovery device |
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| CN108825172A CN108825172A (en) | 2018-11-16 |
| CN108825172B true CN108825172B (en) | 2023-07-25 |
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Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915074B (en) * | 2010-08-18 | 2013-03-13 | 西安长庆科技工程有限责任公司 | Oil field well casing gas recovery device and process |
| CN102747989B (en) * | 2012-07-29 | 2015-02-18 | 上海亿景能源科技有限公司 | Oil well casing gas collecting device |
| CN203335043U (en) * | 2013-07-11 | 2013-12-11 | 檀长江 | Oil well drive pipe gas recovery device |
| CN203374255U (en) * | 2013-07-29 | 2014-01-01 | 檀长江 | Liquid control type oil well sleeve pipe gas recovery device |
| CN203702098U (en) * | 2013-12-27 | 2014-07-09 | 檀长江 | Self-control type oil well casing gas recovery unit |
| CN203906213U (en) * | 2014-07-01 | 2014-10-29 | 胜利油田元吉石油科技有限公司 | Pressurization air-extraction device for oil well casing |
| CN204312030U (en) * | 2014-11-17 | 2015-05-06 | 中国石油天然气股份有限公司 | A kind of for collecting well group associated gas recovery device |
| CN104929586B (en) * | 2015-06-19 | 2017-06-23 | 檀长江 | Self-control type oil well casing |
| CN204899880U (en) * | 2015-07-31 | 2015-12-23 | 中国石油化工股份有限公司 | Sleeve pipe gas retrieves pump and impinger thereof |
| CN204899882U (en) * | 2015-08-31 | 2015-12-23 | 张琼 | Oil field oil well sleeve pipe gas collection device |
| CN105178919B (en) * | 2015-10-09 | 2018-01-19 | 檀长江 | Self-control type oil well casing |
| CN205000951U (en) * | 2015-10-09 | 2016-01-27 | 檀长江 | Self -controlled oil well casing gas recovery device |
| CN205823250U (en) * | 2016-06-27 | 2016-12-21 | 北京鼎耀卓达科技发展有限公司 | A kind of self-operated type casing gas boosting recovery device |
| CN206091936U (en) * | 2016-10-17 | 2017-04-12 | 河北耀一节能设备制造有限责任公司 | Oil well casing gas pressure boost recovery unit |
| CN207686682U (en) * | 2017-05-20 | 2018-08-03 | 胜利油田瑞特机械制造有限责任公司 | A kind of casing gas recovering device |
| CN208702383U (en) * | 2018-08-29 | 2019-04-05 | 蚌埠市新达压缩机制造有限公司 | Unpowered casing gas recovering device |
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