CN214616459U - Axial stepped valve system of packer valve joint - Google Patents
Axial stepped valve system of packer valve joint Download PDFInfo
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- CN214616459U CN214616459U CN202120946126.3U CN202120946126U CN214616459U CN 214616459 U CN214616459 U CN 214616459U CN 202120946126 U CN202120946126 U CN 202120946126U CN 214616459 U CN214616459 U CN 214616459U
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Abstract
The utility model discloses an axial stepped valve system of a packer valve joint, which comprises a body shell, wherein an opening valve, a one-way valve and a closing valve are sequentially arranged on the body shell, a liquid inlet channel of the opening valve is arranged at the bottom of the opening valve, and liquid in a well can flow to the bottom of the opening valve through the liquid inlet channel of the opening valve; the bottom of the one-way valve is provided with a one-way valve liquid inlet channel which is communicated with the middle lower part of the opening valve; the middle part of the closing valve is provided with a closing valve liquid inlet channel which is communicated with the middle lower part of the one-way valve; the middle lower part of the shut-off valve is provided with a rubber cylinder liquid inlet channel, the upper part of the shut-off valve is provided with a liquid return channel, the rubber cylinder liquid inlet channel and the liquid return channel are respectively communicated with the rubber cylinder, and the lowest end of the shut-off valve is provided with a valve seat hole vent hole of the shut-off valve. The utility model discloses structural design is ingenious, can make case installation and during operation, and the sealing washer is not sheared the damage, and the case uses the composite seal of sealing washer and conical surface elastomer sealing strip, and is sealed reliable.
Description
Technical Field
The utility model relates to an oil natural gas-solid well completion instrument technical field especially relates to a packer valve connects axial ladder valve system.
Background
The setting of the casing external packer for well cementation is realized by controlling a valve system to expand a packer rubber cylinder through pressure change, so that the purpose of sealing a stratum by a borehole ring is achieved. The control valve system is a core control system of the casing external packer, is an integrated structure of a packer liquid inlet channel, a pressure control system and a sealing system, influences the expansion effect of the tool and the effective packing degree of the stratum, and is a guarantee for the successful application of the external packing well completion technology.
The casing external packer composed of the control valve system and the packer rubber cylinder is widely applied to the well cementing and completion of a horizontal well, mainly used for effectively packing production zones, avoiding the channeling among the production zones and providing a foundation for the later production control and yield increase transformation. The conventional packer control valve is complex, the action among the valves is discontinuous, and a liquid flow channel cannot transfer or seal liquid; if one valve fails, the control valve system will fail as a whole.
The patent No. CN204082090U discloses a control valve system of a casing external packer, which comprises a locking valve, a check valve and a pressure limiting valve which are respectively arranged on a valve body, wherein the bottom of a valve hole of the locking valve is communicated with a liquid inlet channel I, the valve hole of the locking valve is communicated with the bottom of the valve hole of the check valve through a liquid inlet channel II, the valve hole of the check valve is communicated with the valve hole of the pressure limiting valve through a liquid inlet channel III, the valve hole of the pressure limiting valve is communicated with a liquid inlet channel IV communicated with an expansion cavity of a packer rubber barrel, and the bottom of the valve hole of the pressure limiting valve is communicated with a liquid return channel communicated with the rubber barrel. Each group of valves in the patent has simple structure and each valve is opened flexibly; the double flow-breaking and single flow functions of the locking valve and the check valve prevent liquid in the rubber cylinder from flowing back, and permanent sealing is realized. However, this packer control valve system is inconvenient to install, and in addition, when installing and using, because each valve rod needs to move in the valve hole, the sealing ring on the valve rod is easy to damage, thereby causing unreliable sealing.
SUMMERY OF THE UTILITY MODEL
The utility model provides a packer valve connects axial ladder valve system has simple to operate, the sealing washer is not fragile, sealed reliable effect. The specific technical scheme is as follows:
an axial stepped valve system of a packer valve joint comprises a body shell, wherein an opening valve, a one-way valve and a closing valve are sequentially arranged on the body shell, a liquid inlet channel of the opening valve is arranged at the bottom of the opening valve, and liquid in a well can flow to the bottom of the opening valve through the liquid inlet channel of the opening valve; the bottom of the one-way valve is provided with a one-way valve liquid inlet channel which is communicated with the middle lower part of the opening valve; the middle part of the closing valve is provided with a closing valve liquid inlet channel which is communicated with the middle lower part of the one-way valve; the middle lower part of the shut-off valve is provided with a rubber cylinder liquid inlet channel, the upper part of the shut-off valve is provided with a liquid return channel, the rubber cylinder liquid inlet channel and the liquid return channel are respectively communicated with the rubber cylinder, and the lowest end of the shut-off valve is provided with a valve seat hole vent hole of the shut-off valve.
Further, the body housing is provided with an opening valve seat hole, a one-way valve seat hole and a closing valve seat hole, and the opening valve body, the one-way valve body and the closing valve body are respectively accommodated in the opening valve seat hole, the one-way valve seat hole and the closing valve seat hole to form an opening valve, a one-way valve and a closing valve.
Further, the valve body of the opening valve comprises an opening valve core, the opening valve core is arranged in a valve seat hole of the opening valve, the upper part of the opening valve core is rod-shaped, the upper part of the opening valve core is connected with an opening valve pressing cap, and the opening valve pressing cap is connected with an inlet of the valve seat hole of the opening valve; the opening valve pressure cap is provided with a through hole, the rod-shaped upper end is provided with an opening valve elastic retaining ring, and the upper end of the opening valve spool and the opening valve elastic retaining ring are accommodated in the through hole of the opening valve pressure cap in a pressing manner; the lower part of the valve core of the opening valve is in a step shape, the lower end of the valve seat hole of the opening valve is a step hole matched with the lower part of the valve core of the opening valve, and an upper sealing ring of the opening valve and a lower sealing ring of the opening valve are respectively arranged at two ends of the step shape at the lower part of the valve core of the opening valve.
Further, the valve core of the opening valve is connected with the pressure cap of the opening valve through the opening valve pin nail; the upper part of the valve core of the opening valve is sleeved with an opening valve spring, one end of the opening valve spring is connected with the opening valve pressing cap, and the other end of the opening valve spring is connected with the lower part of the valve core of the opening valve in a step shape.
Furthermore, the check valve body comprises a check valve core, and the check valve core is accommodated in the check valve seat hole; the one-way valve core is provided with a blind hole, a one-way valve spring is arranged in the blind hole, one end of the one-way valve spring is connected with the one-way valve core, the other end of the one-way valve spring is connected with a one-way valve pressing cap, and the one-way valve pressing cap is connected with the upper end of the one-way valve seat hole.
Furthermore, the valve core of the one-way valve is in a step shape, the small-diameter end of the valve core of the one-way valve is provided with a valve core sealing ring of the one-way valve, the reducing conical surface of the valve core of the one-way valve is provided with a valve core sealing belt of the one-way valve, and the lower part of a valve seat hole of the one-way valve is a step hole matched with the valve core of the one-way valve.
Further, the shut-off valve seat hole is in a stepped shape with a large upper part and a small lower part, the middle upper part of the shut-off valve core is in a stepped shape with a large upper part and a small lower part which are matched with the shut-off valve seat hole, the shut-off valve body comprises the shut-off valve core, the lower part of the shut-off valve core is provided with a flange matched with the shut-off valve seat hole, the flange is provided with a shut-off valve core lower sealing ring, and the lowest end of the shut-off valve seat hole is communicated with a vent hole of the shut-off valve seat hole.
Further, the diameter of the uppermost part of the valve seat hole of the shut-off valve is larger than the diameter between the part where the valve seat hole of the shut-off valve is communicated with the reverse liquid channel and the part where the valve seat hole of the shut-off valve is communicated with the liquid inlet channel of the shut-off valve; the diameter between the communicating part of the valve seat hole of the closing valve and the liquid return channel and the communicating part of the valve seat hole of the closing valve and the liquid inlet channel of the closing valve is larger than the diameter between the communicating part of the valve seat hole of the closing valve and the liquid inlet channel of the closing valve and the communicating part of the valve seat hole of the closing valve and the liquid inlet channel of the rubber cylinder; the diameter between the connection between the valve seat hole of the shut-off valve and the liquid inlet channel of the shut-off valve and the connection between the valve seat hole of the shut-off valve and the liquid inlet channel of the rubber cylinder is larger than the diameter of the lowest part of the valve seat hole of the shut-off valve.
Furthermore, a closing valve core upper sealing ring and a closing valve core middle sealing ring are respectively arranged at the large diameter part and the small diameter part of the middle upper part of the closing valve core in a step shape, and a closing valve core sealing strip is arranged at the middle upper part of the closing valve core in the step-shaped reducing part.
Further, a valve seat hole of the closing valve and the middle lower part of a valve core of the closing valve form a liquid inlet cavity related to the closing valve; the liquid inlet channel of the shut-off valve and the liquid inlet channel of the rubber cylinder are respectively communicated with the liquid inlet chamber of the shut-off valve, and the outlet of the liquid inlet channel of the shut-off valve is positioned at the upper part of the liquid inlet chamber of the shut-off valve; the inlet of the glue cylinder liquid inlet channel is positioned at the lower part of the liquid inlet chamber of the closing valve, the liquid return channel is positioned at the upper part of the valve body of the closing valve, and the sealing ring on the valve core of the closing valve and the sealing ring in the valve core of the closing valve seal and separate the glue cylinder liquid inlet channel and the liquid return channel.
The utility model has the advantages that the structure design is ingenious, the valve core of the opening valve is designed in a ladder shape, the sealing ring is not cut and damaged when the valve core is installed and works, the valve core is sealed reliably by the compound sealing of the sealing ring and the conical surface elastomer sealing strip; in addition, the valve core of the one-way valve is sealed by a composite seal of a seal ring and a seal belt, so that the seal is reliable; the valve core structure of the shut-off valve is in a step shape, so that the one-way differential pressure control of the shut-off valve is realized, the shut-off pressure is accurate, and the shut-off is reliable.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic view of an initial state of an axial stepped valve system of a packer valve joint according to the present invention;
FIG. 2 is a schematic view of the working state of an axial step valve system of a packer valve joint of the present invention;
fig. 3 is a schematic view of the closed state of the axial stepped valve system of the packer valve joint of the present invention.
Detailed Description
In order to better understand the purpose, function and specific design scheme of the present invention, the axial step valve system of the packer valve joint of the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-3, the axial step valve system of packer valve joint of the present invention comprises a body housing 1, wherein an opening valve seat hole 26, a check valve seat hole 27 and a closing valve seat hole 28 are sequentially disposed on the body housing 1, and the opening valve body, the check valve body and the closing valve body are respectively accommodated in the opening valve seat hole 26, the check valve seat hole 27 and the closing valve seat hole 28 to form an opening valve, a check valve and a closing valve.
The bottom of the open valve is provided with an open valve liquid inlet channel 29, and liquid in the well can flow to the bottom of the open valve through the open valve liquid inlet channel 29; the bottom of the one-way valve is provided with a one-way valve liquid inlet channel 30, and the one-way valve liquid inlet channel 30 is communicated with the middle part of the opening valve; a liquid inlet channel 31 of the closing valve is arranged in the middle of the closing valve, and the liquid inlet channel 31 of the closing valve is communicated with the middle lower part of the one-way valve; the middle lower part of the shut-off valve is provided with a rubber cylinder liquid inlet channel 32, the middle upper part of the shut-off valve is provided with a liquid return channel 33, the rubber cylinder liquid inlet channel 32 and the liquid return channel 33 are respectively communicated with the rubber cylinder, and the lowest end of the shut-off valve is provided with a valve seat hole vent hole of the shut-off valve.
Specifically, the valve body of the opening valve comprises an opening valve core 8, the opening valve core 8 is arranged in an opening valve seat hole 26, the upper part of the opening valve core 8 is in a rod shape, the upper part of the opening valve core 8 is connected with an opening valve pressing cap 5, and the opening valve pressing cap 5 is connected with an inlet of the opening valve seat hole 26; the opening valve pressure cap 5 is provided with a through hole, the rod-shaped upper end is provided with a blocking ring groove, a valve opening elastic blocking ring 6 is arranged in the blocking ring groove, the upper end of the valve core 8 of the opening valve and the valve opening elastic blocking ring 6 are accommodated in the through hole of the valve opening pressure cap 5 after being compressed, the valve core 8 of the opening valve and the valve opening pressure cap 5 are connected through a valve opening pin 7, and the relative position of the valve core 8 of the opening valve and the valve opening pressure cap 5 is limited; the lower part of the valve core 8 of the opening valve is in a step shape, the diameter of one end close to the rod shape is larger than that of the end far away from the rod shape, namely, the lower part of the valve core 8 of the opening valve is in a step shape with a large upper part and a small lower part, in addition, the lower end of the valve hole 26 of the opening valve is a step hole matched with the lower part of the valve core 8 of the opening valve, and the two ends of the step shape with the large diameter and the small diameter of the lower part of the valve core 8 of the opening valve are respectively provided with an upper sealing ring 3 of the opening valve and a lower sealing ring 2 of the opening valve. Because the lower end of the valve core 8 of the opening valve is in a stepped shape, the valve core 8 of the opening valve is prevented from being sheared and damaged when the valve core 8 of the opening valve is installed and in the working process.
It is worth noting that the upper portion of the open valve spool 8 is sleeved with an open valve spring 4, one end of the open valve spring 4 is connected with the open valve pressing cap 5, the other end of the open valve spring 4 is connected with the lower end of the open valve spool 8, after liquid transfer is completed, the open valve spool 8 and the open valve elastic retaining ring 6 move downwards under the action of the open valve spring 4, the open valve spool 8 is pushed to the lowest position of the open valve seat hole 26, and the one-way valve liquid inlet channel 30 is closed.
The check valve body comprises a check valve core 14, and the check valve core 14 is accommodated in the check valve seat hole 27; the check valve core 14 is provided with a blind hole, a check valve spring 12 is arranged in the blind hole, one end of the check valve spring 12 is connected with the check valve core 14, the other end of the check valve spring is connected with a check valve pressing cap 13, a spring fixing column is arranged on the check valve pressing cap 13, and the check valve spring 12 is sleeved on the spring fixing column. The check valve cap 13 is screwed with the upper end of the check valve seat hole 27.
It should be noted that the check valve core 14 of the present embodiment is stepped, the small diameter end of the check valve core 14 is provided with a check valve core sealing ring 9, and the reducing conical surface of the check valve core 14 is provided with a check valve core sealing strip 10, and preferably, the check valve core sealing strip 10 is bonded and sealed by vulcanized rubber or soft metal or metal. The lower part of the check valve seat hole 27 is a stepped hole matched with the check valve core 14, the reducing part of the check valve seat hole 27 is a valve seat, the valve seat is arranged at the lower part of the check valve seat hole 27 and the closing valve liquid inlet channel 31, and the closing valve liquid inlet channel 31 is communicated with the middle lower part of the check valve seat hole 27.
The check valve liquid inlet channel 30 is communicated with the bottom of the check valve seat hole 27, when the liquid from the check valve liquid inlet channel 30 reaches a certain pressure value, the check valve spring 12 is compressed due to the pressure of the liquid, and at the moment, the check valve core 14 moves upwards, so that the check valve liquid inlet channel 30 is communicated with a liquid path of the closing valve liquid inlet channel 31; high pressure liquid enters the shut-off valve seat orifice 28 through the check valve inlet passage 30, the check valve seat orifice 27 and the shut-off valve inlet passage 31.
The valve body of the shut-off valve comprises a valve core 16 of the shut-off valve, the uppermost part of the valve core 16 of the shut-off valve is rod-shaped, the upper part of the valve core 16 of the shut-off valve is connected with a pressure cap 19 of the shut-off valve, the pressure cap 19 of the shut-off valve is connected with the upper end of a valve seat hole 28 of the shut-off valve in a threaded manner; the closing valve pressure cap 19 is provided with a through hole, and the inner circular surface of the closing valve pressure cap 19 is matched with the outer circular surface of the closing valve pin seat 20; the inner circle surface of the closing valve pin seat 20 is matched with the outer circle surface of the rod-shaped end part of the closing valve core 16, and the closing valve pin seat 20 and the closing valve core 16 are pinned together through a closing valve pin 17; the upper end of the through hole of the shutoff valve pressure cap 19 is connected to the shutoff valve pin holder pressure cap 18, thereby restricting the relative positions of the shutoff valve spool 16 and the shutoff valve pressure cap 19. Preferably, the shut-off valve pin holder gland 18 is provided with a shut-off valve pin holder gland seal 15.
The shut-off valve seat bore 28 is of a multi-step shape having a smaller lower end and a larger upper end, and more specifically, the diameter of the uppermost portion of the shut-off valve seat bore 28 is larger than the diameter between the portion of the shut-off valve seat bore 28 communicating with the reverse flow path 33 and the portion of the shut-off valve seat bore 28 communicating with the shut-off valve inlet flow path 31; the diameter between the communication part of the shut-off valve seat hole 28 and the back-flow channel 33 and the communication part of the shut-off valve seat hole 28 and the shut-off valve liquid inlet channel 31 is larger than the diameter between the communication part of the shut-off valve seat hole 28 and the shut-off valve liquid inlet channel 31 and the communication part of the shut-off valve seat hole 28 and the rubber cylinder liquid inlet channel 32; the diameter between the point where the shut-off valve seat bore 28 communicates with the shut-off valve inlet passage 31 and the point where the shut-off valve seat bore 28 communicates with the cartridge inlet passage 32 is larger than the diameter of the lowermost portion of the shut-off valve seat bore 28. The lowermost end of the shut-off valve seat bore 28 communicates with a shut-off valve seat bore vent 34.
The middle upper part of the shut-off valve core 16 is in a step shape with a big top and a small bottom, a shut-off valve core upper sealing ring 22 and a shut-off valve core middle sealing ring 24 are respectively arranged at the large diameter part and the small diameter part of the step shape of the middle upper part of the shut-off valve core 16, a shut-off valve core sealing strip 23 is arranged at the step-shaped reducing part of the middle upper part of the shut-off valve core 16, and a valve seat is arranged at the lower end of the communicating part of the shut-off valve seat hole 28 and the shut-off valve liquid inlet channel 31; the lowermost portion of the shutoff valve cartridge 16 is provided with a flange which engages the shutoff valve seat bore 28 and on which is provided a shutoff valve cartridge lower seal 25. Because the shut-off valve seat bore 28 is stepped in shape and the shut-off valve spool 16 is also stepped, the shut-off valve spool 16 will not be damaged by the shut-off valve spool center seal 24 and the shut-off valve spool lower seal 25 during assembly and operation.
A space channel formed by the closing valve seat hole 28 and the middle lower part of the closing valve core 16 forms a closing valve liquid inlet chamber, namely, a space channel formed between the closing valve seat hole 28 and the flange at the lowest part of the closing valve core 16 and the stepped lower end of the closing valve core 16 forms a closing valve liquid inlet chamber; the liquid inlet channel 31 of the shut-off valve and the liquid inlet channel 32 of the rubber cylinder are respectively communicated with the liquid inlet chamber of the shut-off valve, and the outlet of the liquid inlet channel 31 of the shut-off valve is positioned at the upper part of the liquid inlet chamber of the shut-off valve; the inlet of the glue cylinder liquid inlet channel 32 is positioned at the lower part of the liquid inlet chamber of the closing valve, and the liquid return channel 33 is positioned at the upper part of the valve body of the closing valve. In the shut-off valve seat bore 28, a shut-off valve cartridge upper seal 22 and a shut-off valve cartridge middle seal 24 seal the cartridge feed passage 32 and the return passage 33 from each other.
The two ends of the body shell 1 are provided with threads, one end of each thread is connected with the end part of the rubber cylinder of the external packer of the sleeve, and the other end of each thread is connected with the sleeve.
The utility model discloses when using, body shell 1 constitutes integratively with the packer packing element, forms one set of complete sleeve pipe outer packer, goes into the well with the sleeve pipe series connection down, refer to fig. 1, open the valve, the check valve all is in the closed condition, the shutoff valve is in the open mode, at this moment, open valve inlet channel 29 and check valve inlet channel 30 and do not communicate, shutoff valve inlet channel 31 and packing element inlet channel 32 communicate, return liquid passageway 33 and shutoff valve upper portion intercommunication, do not have the liquid to get into.
Referring to fig. 2, after the casing packer is lowered into a working position, after a high pressure pump is used for pressing cementing fluid through a wellhead, the fluid flows through the open valve, enters the bottom of the open valve through the open valve fluid inlet channel 29, generates upward thrust on the bottom of the open valve spool 8, when the pressure of the open valve spool 8 reaches a certain pressure value, the open valve pin 7 is cut off, the open valve spool 8 and the open valve elastic retaining ring 6 move upwards, the open valve fluid inlet channel 29 is communicated with the one-way valve fluid inlet channel 30, the fluid flows to the one-way valve through the one-way valve fluid inlet channel 30, the cementing fluid flows to the bottom of the one-way valve spool 14, the one-way valve spring 12 is compressed due to the pressure of the cementing fluid, the one-way valve spool 14 moves upwards, the fluid flows into the closed valve fluid inlet channel 31 through the one-way valve seat hole 27, then flows into the closed valve fluid inlet chamber, and then flows into the rubber sleeve fluid inlet channel 32 through the closed valve fluid inlet chamber, finally enters a packer rubber sleeve expansion cavity to enable the rubber sleeve to expand and tightly contact with the well wall to form setting, so that the liquid of the shut-off valve works, and the well cementation liquid in the rubber sleeve enters the upper part of the shut-off valve through a liquid return channel 33.
The closed state of the shut-off valve is shown in fig. 3, the cementing liquid in the rubber cylinder enters the upper part of the valve core 16 of the shut-off valve through the liquid return channel 33, when the liquid pressure reaches a certain value, the pin 17 of the shut-off valve is sheared, the valve core 16 of the shut-off valve moves downwards, the liquid inlet channel 31 of the shut-off valve is separated from the liquid inlet channel 32 of the rubber cylinder due to the ladder shape of the middle upper part of the valve core of the shut-off valve, the liquid inlet channel 32 of the rubber cylinder is closed, and the liquid transmission is stopped.
At this time, the valve core 8 and the elastic retaining ring 6 of the open valve move downwards under the pressure of the open valve spring 4, when the valve core 8 of the open valve reaches the lowest end of the valve seat hole 26 of the open valve, the position is limited by the end surface at the lower end of the valve seat hole 26 of the open valve, at this time, the liquid inlet channel 30 of the one-way valve is closed, after the elastic retaining ring 6 of the open valve moves downwards, the elastic retaining ring 6 of the open valve moves out of the end surface at the lower end of the pressure cap 5 of the open valve, the elastic retaining ring 6 of the open valve recovers elasticity, after the outer diameter of the elastic retaining ring 6 of the open valve is increased, the lower end of the pressure cap 5 of the open valve blocks the elastic retaining ring 6 of the open valve, the elastic retaining ring 6 of the open valve cannot move upwards, and the elastic retaining ring 6 of the open valve can not move upwards to enable the open valve again, so that the open valve can not be opened again to form permanent closing. Meanwhile, the check valve core 14 moves down the check valve core 14 and returns to the initial position under the pressure of the check valve spring 12, so that the check valve is closed.
Because the opening valve can only be opened once under continuous action, the double flow-cutting and single flow actions of the opening valve and the check valve, the upward pressure acting on the lower end surface of the lower end of the valve core 16 of the closing valve is greater than the downward pressure acting on the upper end surface of the lower end, and the closing valve cannot be opened again; therefore, the expansion of the rubber cylinder of the control valve system is a continuous but irreversible process, the liquid pumping operation must be continuously performed after the control valve system is opened, once the control valve system is stopped, the valve system is locked, the liquid flow hole is closed, and all liquid cannot flow through the control valve system again to enter and exit.
The utility model has the advantages that the structure design is ingenious, the valve core of the opening valve is designed in a ladder shape, the sealing ring is not cut and damaged when the valve core is installed and works, the valve core is sealed reliably by the compound sealing of the sealing ring and the conical surface elastomer sealing strip; in addition, the valve core of the one-way valve is sealed by a composite seal of a seal ring and a seal belt, so that the seal is reliable; the valve core structure of the shut-off valve is in a step shape, so that the one-way differential pressure control of the shut-off valve is realized, the shut-off pressure is accurate, and the shut-off is reliable.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. An axial stepped valve system of a packer valve joint is characterized by comprising a body shell, wherein an opening valve, a one-way valve and a closing valve are sequentially arranged on the body shell, a liquid inlet channel of the opening valve is arranged at the bottom of the opening valve, and liquid in a well can flow to the bottom of the opening valve through the liquid inlet channel of the opening valve; the bottom of the one-way valve is provided with a one-way valve liquid inlet channel which is communicated with the middle lower part of the opening valve; the middle part of the closing valve is provided with a closing valve liquid inlet channel which is communicated with the middle lower part of the one-way valve; the middle lower part of the shut-off valve is provided with a rubber cylinder liquid inlet channel, the upper part of the shut-off valve is provided with a liquid return channel, the rubber cylinder liquid inlet channel and the liquid return channel are respectively communicated with the rubber cylinder, and the lowest end of the shut-off valve is provided with a valve seat hole vent hole of the shut-off valve.
2. The axial step valve system of a packer valve joint as recited in claim 1, wherein the body housing is provided with an open valve seat bore, a check valve seat bore and a closed valve seat bore, the open valve body, the check valve body and the closed valve body being received in the open valve seat bore, the check valve seat bore and the closed valve seat bore, respectively, to form the open valve, the check valve and the closed valve.
3. The axial step valve system of packer valve joint as recited in claim 2, wherein the opening valve body comprises an opening valve spool disposed in an opening valve seat hole, the upper portion of the opening valve spool being rod-shaped, the upper portion of the opening valve spool being connected to an opening valve pressure cap connected to an inlet of the opening valve seat hole; the opening valve pressure cap is provided with a through hole, the rod-shaped upper end is provided with an opening valve elastic retaining ring, and the upper end of the opening valve spool and the opening valve elastic retaining ring are accommodated in the through hole of the opening valve pressure cap in a pressing manner; the lower part of the valve core of the opening valve is in a step shape, the lower end of the valve seat hole of the opening valve is a step hole matched with the lower part of the valve core of the opening valve, and an upper sealing ring of the opening valve and a lower sealing ring of the opening valve are respectively arranged at two ends of the step shape at the lower part of the valve core of the opening valve.
4. The axial step valve system of packer valve joints as claimed in claim 3, wherein the opening valve spool is connected to the opening valve gland by an opening valve pin; the upper part of the valve core of the opening valve is sleeved with an opening valve spring, one end of the opening valve spring is connected with the opening valve pressing cap, and the other end of the opening valve spring is connected with the lower part of the valve core of the opening valve in a step shape.
5. The axial step valve system of a packer valve joint as recited in claim 2, wherein the check valve body includes a check valve spool received in the check valve seat bore; the one-way valve core is provided with a blind hole, a one-way valve spring is arranged in the blind hole, one end of the one-way valve spring is connected with the one-way valve core, the other end of the one-way valve spring is connected with a one-way valve pressing cap, and the one-way valve pressing cap is connected with the upper end of the one-way valve seat hole.
6. The axial stepped valve system of claim 5, wherein the check valve core is stepped, the small diameter end of the check valve core is provided with a check valve core sealing ring, the reduced diameter conical surface of the check valve core is provided with a check valve core sealing strip, and the lower part of the check valve seat hole is a stepped hole matched with the check valve core.
7. The axial step valve system of the packer valve joint as recited in claim 2, wherein the shut-off valve seat bore is in a stepped shape having a large upper portion and a small lower portion, the shut-off valve body includes a shut-off valve spool, the middle upper portion of the shut-off valve spool is in a stepped shape having a large upper portion and a small lower portion that are fitted to the shut-off valve seat bore, the lower portion of the shut-off valve spool is provided with a flange that is fitted to the shut-off valve seat bore, the flange is provided with a shut-off valve spool lower seal, and the lowest end of the shut-off valve seat bore is communicated with the shut-off valve seat bore vent hole.
8. A packer valve coupling axial step valve train as recited in claim 7 wherein the diameter of the uppermost portion of the shut-off valve seat bore is greater than the diameter between the portion of the shut-off valve seat bore communicating with the reverse flow passage and the portion of the shut-off valve seat bore communicating with the shut-off valve inlet passage; the diameter between the communicating part of the valve seat hole of the closing valve and the liquid return channel and the communicating part of the valve seat hole of the closing valve and the liquid inlet channel of the closing valve is larger than the diameter between the communicating part of the valve seat hole of the closing valve and the liquid inlet channel of the closing valve and the communicating part of the valve seat hole of the closing valve and the liquid inlet channel of the rubber cylinder; the diameter between the connection between the valve seat hole of the shut-off valve and the liquid inlet channel of the shut-off valve and the connection between the valve seat hole of the shut-off valve and the liquid inlet channel of the rubber cylinder is larger than the diameter of the lowest part of the valve seat hole of the shut-off valve.
9. The axial stepped valve system of a packer valve joint as claimed in claim 8, wherein the middle upper part of the shut-off valve core is provided with a stepped large diameter part and a stepped small diameter part respectively with a shut-off valve core upper sealing ring and a shut-off valve core middle sealing ring, and the middle upper part of the shut-off valve core is provided with a stepped reducing part with a shut-off valve core sealing strip.
10. The axial step valve system of a packer valve joint as recited in claim 9, wherein the bore of the seat of the shut-off valve and the lower middle portion of the core of the shut-off valve define a closed-valve inlet chamber; the liquid inlet channel of the shut-off valve and the liquid inlet channel of the rubber cylinder are respectively communicated with the liquid inlet chamber of the shut-off valve, and the outlet of the liquid inlet channel of the shut-off valve is positioned at the upper part of the liquid inlet chamber of the shut-off valve; the inlet of the glue cylinder liquid inlet channel is positioned at the lower part of the liquid inlet chamber of the closing valve, the liquid return channel is positioned at the upper part of the valve body of the closing valve, and the sealing ring on the valve core of the closing valve and the sealing ring in the valve core of the closing valve seal and separate the glue cylinder liquid inlet channel and the liquid return channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120946126.3U CN214616459U (en) | 2021-05-06 | 2021-05-06 | Axial stepped valve system of packer valve joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120946126.3U CN214616459U (en) | 2021-05-06 | 2021-05-06 | Axial stepped valve system of packer valve joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214616459U true CN214616459U (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120946126.3U Active CN214616459U (en) | 2021-05-06 | 2021-05-06 | Axial stepped valve system of packer valve joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214616459U (en) |
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2021
- 2021-05-06 CN CN202120946126.3U patent/CN214616459U/en active Active
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