CN209855748U - Deep well air release valve - Google Patents
Deep well air release valve Download PDFInfo
- Publication number
- CN209855748U CN209855748U CN201920233936.7U CN201920233936U CN209855748U CN 209855748 U CN209855748 U CN 209855748U CN 201920233936 U CN201920233936 U CN 201920233936U CN 209855748 U CN209855748 U CN 209855748U
- Authority
- CN
- China
- Prior art keywords
- piston rod
- ring
- air
- deep well
- air release
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Sealing Devices (AREA)
Abstract
A piston rod is arranged in a connecting cylinder of the deep well air release valve, and a hydraulic cavity for pressurizing at the upper end of an air inlet sleeve is communicated with a table top on the side wall of the upper section of the piston rod; the middle section of the piston rod is connected with a spring for resetting, and the lower section of the piston rod is provided with an air vent penetrating through the side wall; the side wall of the air release sleeve is provided with an air release ring corresponding to the air release hole. Compared with the prior art, the upper limit of the piston rod descending bearable pressure intensity is improved by utilizing the structural design of pressurizing the table top, the up-and-down movement of the piston can be flexibly realized in a deep well, and the annular pressure of the oil sleeve is effectively controlled.
Description
Technical Field
The utility model belongs to the technical field of oil gas field development instrument in the pit and specifically relates to a deep well bleed valve.
Background
During the production of oil and gas, a large amount of gas is produced within the casing as the oil and gas is produced. When the air pressure of the sleeve is overlarge, the working fluid level is lowered; when the working fluid level descends to the oil pipe pump suction inlet, gas can enter the pump and lift to the ground along with the oil well pump, so that on one hand, the working efficiency of the oil well pump can be influenced, the oil well yield can be reduced, on the other hand, the oil well pump can generate cavitation erosion, and the service life of the pump machine can be further influenced.
The air release valve is generally arranged at the upper end of the cable-passing packer and exhausts casing gas when the underground air pressure is too high, so that the underground annular pressure is effectively adjusted and the yield is improved; is an important exhaust device in the oil and gas exploitation process. The existing underground air release valve uses a piston rod to push a spring, and the lower limit value of the sectional area of the piston rod is certain under the stratum condition, so that the use depth of the air release valve is limited. Therefore, it is necessary to research a deep well air release valve, which can reduce the area of the piston surface to a large extent, and can ensure the stability of the working fluid level and the efficient production of an oil well under the condition of complex pressure in the well.
Chinese patent No. CN 201520454031.4 discloses an underground air release valve which can be installed in a deep well, the upper end of a valve body is connected with a pressure cap, the lower end is connected with a lower joint, the pressure cap withstands a piston through a spring in a spring sleeve in the valve body; the side wall of the valve body is provided with the air outlet, the air outlet is completely opened when the piston is at the tail end of the stroke, the piston is provided with a through hole penetrating through the upper end and the lower end of the piston, the through hole is communicated with the lower joint and a cavity inside the spring sleeve, and the through hole penetrating through the piston is utilized to complete the pressure balance of the piston up and down, so that the opening pressure of a product is not influenced by the pressure of the lower part, and the application range is enlarged.
Chinese patent No. CN 201621451970.4 discloses a gas release valve, wherein an exhaust port is provided on the side wall of a valve housing, a mandrel is provided inside the valve housing, a liquid inlet channel is provided inside the mandrel, a balance cavity is provided between the mandrel and an upper joint, the upper end of the liquid inlet channel is connected to the balance cavity, and the lower end is connected to a piston cavity; the lower end of the mandrel is connected with a hard sealing head; the spring is arranged in a spring cavity between the upper joint and the mandrel, the lower end of the upper joint and the mandrel are respectively connected, and the hard sealing head is pre-tightened by the mandrel so as to close the exhaust port. The outer diameter of the product is reduced by utilizing a hard seal closing mode, the flow area of the product is increased, and the application range of the product in downhole operation is expanded.
Disclosure of Invention
The utility model aims to solve the existing problems and provide a deep well air release valve.
In order to achieve the purpose, the utility model discloses a technical scheme including the cover of bleeding of the cover of admitting air, connecting cylinder and the switch-on air supply that connects gradually, wherein: a piston rod is arranged in the connecting cylinder, and a hydraulic cavity used for pressurizing at the upper end of the air inlet sleeve is communicated with a table top on the side wall of the upper section of the piston rod;
the middle section of the piston rod is connected with a spring for resetting, and the lower section of the piston rod is provided with an air vent penetrating through the side wall; the side wall of the air release sleeve is provided with an air release ring corresponding to the air release hole;
the piston rod overcomes the elasticity of the spring to descend after being pressed on the table surface until the air vent is aligned with and overlapped with the air release ring and then is released; and then returned by means of a spring.
The table top is a ring-shaped step with a large upper part and a small lower part, and an annular space is arranged outside the table top; pressurization of the hydraulic chamber and pressurization of the annular space in turn generates a downward thrust on the table top.
Wherein, the area of the pressed table surface is smaller; when the spring is stressed for a certain time, the upper limit value of the pressure intensity is improved and is not limited by the well depth.
Wherein the axially arranged hydraulic chambers communicate with the table top via radial channels and pressurize it.
The piston rod assembly comprises a piston rod, a connecting cylinder and a first baffle ring, wherein the piston rod is fixedly connected with the middle section of the piston rod; the lower end of the spring is connected with the second retaining ring, and the upper end of the spring is connected with the first retaining ring.
Wherein, still include the clamping ring, the clamping ring is located between the upper end of first fender ring and spring.
Wherein, the rod body of the piston rod is internally provided with an axial through hole which penetrates through the upper end and the lower end of the rod body. The through hole can prevent the piston cavity at the upper part of the piston rod from forming a vacuum cavity, and further balance the pressure of the upper part and the lower part of the piston.
The outer wall of the upper end of the air release sleeve is fixedly connected with the inner wall of the connecting cylinder, and the outer walls of the air release sleeve and the connecting cylinder are provided with air release rings aligned with each other.
The two ends of the air release ring are both provided with sealing designs, each sealing design comprises three sealing rings which are attached in sequence, and the attachment surfaces of the sealing rings are inclined planes.
The cross section of the middle sealing ring in the three sealing rings is trapezoidal, an angle exists between the cross section of the middle sealing ring and the contact surface of the sealing rings at two sides of the middle sealing ring, the three sealing rings are connected tightly, the sealing rings are larger in pressure bearing due to the cross sections, and the sealing effect of the three sealing rings can be guaranteed under higher pressure.
Compared with the prior art, the utility model discloses the utilization improves the piston rod upper limit that can bear pressure down to the pressurized structural design of mesa, also can realize the upper and lower activity of piston in the deep well in a flexible way, the annular pressure of effective control oil jacket.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
referring to the attached drawings, 1-an air inlet sleeve, 2-an air release sleeve, 3-a hydraulic cavity, 4-a connecting cylinder, 5-a piston rod, 6-a piston through hole, 7-a spring cylinder, 8, a spring, 9-a first retaining ring, 10-a pressing ring, 11-a second retaining ring, 12-an air release hole, 13-sealing rings I, 14-sealing rings II, 15-sealing rings III, 16-an air release ring and 17-a table board.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 shows that an embodiment of the present invention is a deep well air release valve which can be normally opened under a high pressure condition in a well to ensure the working efficiency of a pumping unit. Wherein, the air inlet sleeve 1, the connecting cylinder 4 and the air release sleeve 2 communicated with an air source are connected in sequence. In the description of this embodiment, the direction of the air inlet sleeve 1 is taken as the upper direction, and the direction of the air outlet sleeve 2 is taken as the lower direction.
A piston rod is arranged in the connecting cylinder 4, a hydraulic cavity 3 for pressurization is arranged at the upper end of the air inlet sleeve 2, and the hydraulic cavity 3 is communicated with a table-board 17 on the upper section side wall of the piston rod;
further, the table 17 is a step with a larger upper end and a smaller lower end, and is a ring. The outer side of the table-board 17 is also provided with an annular space; pressurising the hydraulic chamber 3 and hence the annular space, in turn can generate a downward thrust on the table 17.
The middle section of the piston rod is also connected with a spring 8 for resetting, and the spring 8 is positioned in a spring cylinder 7 in the middle of the connecting cylinder 4. The lower section of the piston rod is provided with an air vent 12 which penetrates through the side wall; the side wall of the air release sleeve 2 is provided with an air release ring 16 corresponding to the air release hole 12.
Because the area of the pressed table surface 17 is small, the upper limit pressure value is increased when the spring 8 is stressed for a certain time, and the use is not limited by the well depth.
Preferably, the hydraulic chamber 3 is axially arranged, and the hydraulic chamber 3 can be connected to and pressurize the table 17 through a radially opened channel.
The piston rod further comprises a first retaining ring 9 and a second retaining ring 11, and the rod body of the piston rod penetrates through the first retaining ring 9 and the second retaining ring 11. The first baffle ring 9 is fixedly connected with the outer wall of the middle section of the piston rod and is not contacted with the inner wall of the connecting cylinder 4. In this embodiment, the first retainer ring 9 is disposed in the recessed annular groove of the outer wall to form a structure capable of transmitting thrust.
The second baffle ring 11 is fixedly connected with the inner wall of the connecting cylinder 4, the lower end of the second baffle ring 11 is erected on a step on the inner wall of the connecting cylinder 4, the rod body of the piston rod penetrates through a middle hole of the second baffle ring 11 to move, and the second baffle ring 11 does not move along with the rod body. The lower end of the spring 8 is connected with the upper end face of the second retaining ring 1, and the upper end of the spring 8 is connected with the lower end face of the first retaining ring 9; the spring 8 is used for propping against a first stop ring 9 which moves along with the piston rod, and releasing elastic potential energy to reset the piston rod after deflation.
Further, still include clamping ring 10, clamping ring 10 locates between the upper end of first fender ring and spring 8. The pressure ring 10 can share the force-transmitting function of the first retaining ring 9, so that it is worn as little as possible.
Preferably, the upper outer wall of the air release sleeve 2 and the lower inner wall of the connecting cylinder 4 are fixedly connected, and the outer walls of the air release sleeve 2 and the connecting cylinder 4 are provided with aligned air release rings 16.
In use, the embodiment is firstly pressurized through the hydraulic cavity 3 of the air inlet sleeve 1, and the pressure acts on the table-board 17 of the piston rod and pushes the piston rod to move; the piston rod moves downward against the elastic potential energy (elastic force) of the spring 8, and the spring 8 is continuously compressed.
When the air vent 12 of the piston rod reaches the position of the air vent ring 16, the air vent 12 is aligned with the air vent ring 16 and then overlapped, and at the moment, the air in the air vent sleeve 2 is released; when the air bleed hole 12 and the air bleed ring 16 are completely coincident, the stroke of the piston rod reaches the maximum (i.e., the end), and the air bleed speed also reaches the maximum at this time; while the oil jacket ring air pressure is gradually reduced.
After the pressure in the oil jacket ring air returns to normal, the pressurization of the hydraulic chamber 3 is gradually reduced. According to the pressure formula F = P × S, after the pressure is reduced, the acting force on the piston rod is reduced, and when the acting force is smaller than the elastic force of the spring 8, the elastic potential energy of the spring 8 is gradually released, and the piston rod moves upward; the deflation speed gradually decreases.
When the elastic potential energy of the spring is completely released, the deflation speed of the deflation valve is reduced to zero, the piston rod returns to the original position (namely reset), the deflation of the deflation valve is finished, and the air pressure of the oil sleeve annulus is released and adjusted.
Preferably, the piston rod is provided with a through hole 6 extending through the upper and lower ends thereof in the axial direction. The through hole 6 can prevent the piston cavity at the upper part of the piston rod from forming a vacuum cavity, and further balance the pressure of the upper part and the lower part of the piston.
Preferably, the both ends of ring 16 all have sealed design, it includes the three sealing washer of laminating in proper order to seal: seal ring 13, seal ring II14, seal ring III 15. With seal II14 in the middle. Furthermore, the section of the sealing ring II14 is trapezoidal, and an angle exists between the section and the contact surfaces of the sealing ring II14 and the sealing ring III15 on the two sides of the sealing ring II14, so that the sealing ring II14 is tightly connected, the bearing pressure of the sealing ring is larger due to the interactive section, and the sealing effect of the sealing ring can be ensured under higher pressure.
The embodiments of the present invention have been described in conjunction with the accompanying drawings and examples, the structures of which are not intended to limit the present invention, and those skilled in the art can make modifications as required, and all changes and modifications within the scope of the appended claims are within the scope of protection.
Claims (9)
1. A deep well bleed valve which is characterized in that: including the cover of admitting air, connecting cylinder and the cover of releasing air that connects gradually, wherein: a piston rod is arranged in the connecting cylinder, and a hydraulic cavity at the upper end of the air inlet sleeve is communicated with a table top on the side wall of the upper section of the piston rod;
the middle section of the piston rod is connected with a spring for resetting, and the lower section of the piston rod is provided with an air vent; the side wall of the air release sleeve is provided with an air release ring corresponding to the air release hole;
the piston rod overcomes the elasticity of the spring to descend after being pressed on the table top, and then the air is discharged after the air discharge hole is overlapped with the air discharge ring; and then returned by means of a spring.
2. The deep well gas purge valve according to claim 1, wherein: the table top is a ring step with a large upper part and a small lower part, and an annular space is arranged outside the table top; the hydraulic chamber pressurizes and pressurizes the annular space which in turn generates a downward thrust on the table.
3. A deep well gas purge valve according to claim 1 or 2, wherein: the axially arranged hydraulic chambers are connected with the table top through radial channels and pressurize the table top.
4. A deep well gas purge valve according to claim 1 or 2, wherein: the piston rod is fixedly connected with the outer wall of the middle section of the piston rod, and the second baffle ring is fixedly connected with the inner wall of the connecting cylinder; the lower end of the spring is connected with the second retaining ring, and the upper end of the spring is connected with the first retaining ring.
5. The deep well gas purge valve according to claim 4, wherein: still include the clamping ring, the clamping ring is located between the upper end of first fender ring and spring.
6. The deep well gas purge valve according to claim 1, wherein: the rod body of the piston rod is internally provided with a through hole which penetrates through the upper end and the lower end of the rod body.
7. A deep well gas purge valve according to claim 1 or 2, wherein: the outer wall of the upper end of the air release sleeve is fixedly connected with the inner wall of the connecting cylinder, and the outer walls of the air release sleeve and the connecting cylinder are provided with air release rings aligned with each other.
8. The deep well gas purge valve according to claim 7, wherein: the both ends of gassing ring all have sealed design, it includes the three sealing washer of laminating in proper order to seal, the binding face of sealing washer is the inclined plane.
9. The deep well gas purge valve according to claim 8, wherein: the section of the middle sealing ring in the three sealing rings is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920233936.7U CN209855748U (en) | 2019-02-25 | 2019-02-25 | Deep well air release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920233936.7U CN209855748U (en) | 2019-02-25 | 2019-02-25 | Deep well air release valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209855748U true CN209855748U (en) | 2019-12-27 |
Family
ID=68932168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920233936.7U Active CN209855748U (en) | 2019-02-25 | 2019-02-25 | Deep well air release valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209855748U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458255A (en) * | 2021-06-10 | 2022-05-10 | 中国海洋石油集团有限公司 | Direct control exhaust valve |
-
2019
- 2019-02-25 CN CN201920233936.7U patent/CN209855748U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458255A (en) * | 2021-06-10 | 2022-05-10 | 中国海洋石油集团有限公司 | Direct control exhaust valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108060906B (en) | Non-throttling fracturing packer for high-pressure oil-gas well | |
| US20130199849A1 (en) | Impulse-type underground supercharged jet drilling method and device | |
| FI85665C (en) | Hydraulic accumulator in a hydraulic impact tool | |
| CN203867512U (en) | Hydraulic expansion and self-locking seal type well-flushable packer | |
| CN209855748U (en) | Deep well air release valve | |
| CN207131329U (en) | Jet hammer with feeder current accumulation of energy function | |
| CN205503107U (en) | Split type plunger is used in water pumping gas production of tight sand gas | |
| CN111457240A (en) | Horizontal high-pressure large-displacement sand-proof natural gas drain valve | |
| CN203770255U (en) | Pneumatic-hydraulic pressurization cylinder | |
| CN201310620Y (en) | Internal automatic compensation piston | |
| CN204677182U (en) | Differential full-bore well cementation sliding sleeve | |
| CN216950281U (en) | Underground anti-pollution device of pumping well for oil field exploitation | |
| CN206439023U (en) | Packing element, packer and bridging plug with disc spring | |
| CN214196275U (en) | Concentric double-tube jet pump with novel sealing plug structure | |
| CN211874715U (en) | Leather cup type damping pumping-assisting whole barrel pump | |
| CN216974799U (en) | Lifting type air release valve | |
| CN110242551B (en) | Oil-well pump with stable oil pumping efficiency for oil field exploitation | |
| CN208310737U (en) | A kind of water injection packer | |
| CN213271153U (en) | Novel gravity type air damping structure check valve | |
| RU2059113C1 (en) | Device for recovery of liquid from well | |
| RU2198282C2 (en) | Device for wellhead sealing | |
| CN213088164U (en) | Plunger pump hydraulic end | |
| CN209370025U (en) | A kind of hydraulic well pump | |
| RU2263207C1 (en) | Hydroimpulsive well development plant | |
| CN220726708U (en) | Piston with automatic exhaust function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Weibo Inventor after: Yu Xibo Inventor after: Si Limin Inventor after: Zheng Lingyun Inventor after: Yang Yanchao Inventor before: Zhang Weibo Inventor before: Yu Xibo Inventor before: Si Limin Inventor before: Zheng Lingyun |
|
| CB03 | Change of inventor or designer information |