CN117005819A - Kelly no-pressure-difference switchable plug valve - Google Patents
Kelly no-pressure-difference switchable plug valve Download PDFInfo
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- CN117005819A CN117005819A CN202311280170.5A CN202311280170A CN117005819A CN 117005819 A CN117005819 A CN 117005819A CN 202311280170 A CN202311280170 A CN 202311280170A CN 117005819 A CN117005819 A CN 117005819A
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- valve seat
- valve
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- side wall
- pressure
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- 238000007789 sealing Methods 0.000 claims abstract description 126
- 239000012530 fluid Substances 0.000 claims abstract description 55
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to the technical field of exploitation drilling and discloses a kelly differential pressure-free switchable plug valve, which comprises a valve body, a lower valve seat, an upper valve seat and a valve core, wherein grooves are formed in opposite ends of the lower valve seat and the upper valve seat, the grooves are matched with side walls of the valve core, fluid channels are formed in the centers of the upper valve seat and the lower valve seat, a through-flow channel is vertically formed in the side walls of the valve core, a pressure stabilizing structure is arranged on the side walls of the upper valve seat, high-pressure fluid in a well is led into the upper valve seat by the pressure stabilizing structure to be contacted with the valve core, sealing surfaces on two sides of the valve core, which are symmetrical, are all in the same high-pressure fluid, a sealing mechanism is arranged on the side walls of the lower valve seat, and the sealing mechanism is pressed by the high-pressure fluid to be contacted with the valve core. The kelly bar can switch the plug valve without pressure difference, can balance the working environment of the valve core, ensures that the two sides of the valve core have no pressure difference during working, avoids the phenomenon that the plug valve is difficult to open and is eccentric due to uneven stress of the valve core, and increases the working stability and the sealing performance of the plug valve.
Description
Technical Field
The invention relates to the technical field of exploitation drilling, in particular to a kelly differential pressure-free switchable plug valve.
Background
Blowout is a phenomenon that fluid in a stratum is sprayed out of the ground or flows into other strata in a well, most of the phenomenon occurs on the spot where petroleum and natural gas is extracted, blowout is an unexpected accident which is very contraindicated in petroleum or petroleum gas extraction, slurry is injected into a well bore to balance the pressure of the underground stratum when drilling, but when the underground pressure is not tested accurately during exploration or the density of the injected slurry is too low or the formation pressure suddenly becomes large, and the like, the oil or gas in the stratum flows into the well bore, the blowout occurs when the ground is sprayed out uncontrollably, the blowout is often accompanied with toxic gas, and serious harm is caused to the environment and people, and the natural gas is burnt when being blown out, so that the phenomenon is very dangerous.
At present, when blowout occurs, a valve core in the plug valve can be subjected to uneven underground fluid pressure, so that the friction force between the valve core and a valve body or a valve seat is large, the plug valve is difficult to open or close, the plug valve cannot be opened after blowout control to enter normal drilling operation, and the valve core can be subjected to large mechanical abrasion when forcibly opened, so that the plug valve is damaged and fails.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides the kelly bar differential pressure-free switchable plug valve, which has the advantages that the working environment of a valve core can be balanced, the pressure difference at two sides of the valve core is avoided when the valve core works, the phenomenon that the plug valve is difficult to open and is eccentric to wear due to overlarge friction force generated between the valve core and an upper valve seat is avoided, the working stability and the sealing performance of the plug valve are improved, the problems that when blowout happens, the valve core in the plug valve can be subjected to uneven underground fluid pressure, the friction force between the valve core and a valve body or a valve seat is larger, the plug valve is difficult to open and close, or the plug valve is blocked due to larger mechanical abrasion caused by forced opening, and the plug valve is damaged and fails are solved.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the kelly bar differential pressure-free openable plug valve comprises a valve body, a lower valve seat, an upper valve seat and a valve core, wherein grooves are formed in the opposite ends of the lower valve seat and the upper valve seat, the grooves are matched with the side walls of the valve core, fluid channels are formed in the centers of the upper valve seat and the lower valve seat, and a flow passage is vertically formed in the side walls of the valve core;
the side wall of the upper valve seat is provided with a pressure stabilizing structure, and the pressure stabilizing structure guides the underground high-pressure fluid into the upper valve seat to be contacted with the valve core, so that the sealing surfaces at two symmetrical sides of the valve core are both in the same high-pressure fluid;
the side wall of the lower valve seat is provided with a sealing mechanism, the sealing mechanism is pressed by high-pressure fluid to be in contact with the valve core, so that the sealing assembly is in close contact with the side wall of the valve core, and the sealing assembly comprises a first sealing element and a second sealing element;
the side wall of the valve core is symmetrically connected with two shaft pins, the two shaft pins are both connected to the side wall of the valve body in a rotating mode, and one end, away from the valve body, of the shaft pin is connected with the side wall of the valve core.
Preferably, the pressure stabilizing structure comprises a plurality of pressure stabilizing channels arranged on the side wall of the upper valve seat, the pressure stabilizing channels are communicated with grooves on the upper valve seat, through holes are formed in the upper end and the lower end of the lower valve seat in a penetrating mode, the opening of the upper end of each through hole corresponds to the position of each pressure stabilizing channel, two arc-shaped notches are symmetrically formed in one side, opposite to the upper valve seat and the lower valve seat, of each pressure stabilizing structure, the arc-shaped notches are matched with the side wall of the shaft pin, rubber rings are embedded in the side wall of the shaft pin, and the rubber rings are clamped in the arc-shaped notches;
the first seal is disposed in the upper valve seat and the second seal is disposed in the lower valve seat.
Preferably, one side of the first sealing piece is provided with a first sealing part, the first sealing part is sleeved with the fluid channel on the upper valve seat, the other side of the first sealing piece is provided with a first expansion part matched with the side wall of the valve body, one side of the groove on the upper valve seat is provided with a plurality of diversion trenches, the diversion trenches are communicated with the pressure stabilizing channel, and the first expansion part extends to the notch of the diversion trench.
Preferably, one end fixedly connected with cylinder of pivot, the lateral wall of valve body cup joints through mounting hole and cylinder, the one end that the cylinder was kept away from to the pivot is equipped with the hexagonal prism, the lateral wall of case cup joints through hexagonal hole and hexagonal prism, the lateral wall of valve body passes through two closing plates of bolt symmetry fixedly connected with, and closing plate and the one end contact of cylinder, one of them the lateral wall of closing plate is connected with the pivot through sealed bearing rotation, the blind hole of hexagon socket structure has been seted up to the one end of pivot, the other end and the one end fixed connection of cylinder of pivot.
Preferably, the inside cavity that is equipped with of cylinder, the plane has been vertically seted up to one side of cylinder, the feed liquor hole has been seted up to the opposite side of cylinder, and feed liquor hole and cavity intercommunication, the chute has been seted up in the valve body, and the one side and the mounting hole intercommunication of chute have been crossed, the opposite side of chute is equipped with shielding portion, shielding portion cooperatees with the lateral wall of cylinder.
Preferably, the sealing mechanism comprises a plurality of inclined holes formed in the lower valve seat, the inclined holes are communicated with grooves in the lower valve seat, a plunger is sleeved in the inclined holes in a sliding mode, one end of the second sealing piece is provided with a second sealing part, the second sealing part is sleeved with a fluid channel in the lower valve seat, the other end of the second sealing piece is provided with a second expanding part, the second expanding part is matched with the side wall of the valve core, and one end of the plunger is contacted with one side of the second expanding part;
the valve body is internally provided with a fixed table, the lower end of the fixed table is flush with the lower end of the lower valve seat and is fixedly connected with two arc rods through bolts, and the arc rods are in contact with the lower end of the lower valve seat.
Preferably, one side of the arc-shaped rod is provided with a plurality of bulges, one ends of the bulges all extend to the opening of the lower end of the inclined hole, the inner side of the arc-shaped rod is provided with a plurality of openings, and the positions of the openings correspond to the positions of the openings of the inclined hole.
Preferably, the upper end of the lower valve seat is provided with a plurality of positioning blocks, the through holes penetrate through the upper ends of the positioning blocks, the lower end of the upper valve seat is provided with a plurality of positioning grooves, the positioning grooves are communicated with the pressure stabilizing channel, and the positioning grooves are connected with the positioning blocks in a clamping mode.
Preferably, two first sealing rings are clamped in the valve body through annular grooves, one of the first sealing rings is sleeved on the side wall of the upper valve seat, the other of the first sealing rings is sleeved on the side wall of the lower valve seat, second sealing rings are embedded in the fluid channels of the upper valve seat and the lower valve seat, one of the second sealing rings is sleeved with the first sealing member, and the other of the second sealing rings is sleeved with the second sealing member.
Preferably, a boss is arranged in the valve body, a limiting table is arranged above the boss, the limiting table is clamped with the corner of the upper end of the upper valve seat, a positioning ring is arranged at the upper end of the upper valve seat, and the positioning ring is sleeved in the valve body.
(III) beneficial effects
Compared with the prior art, the invention provides the kelly bar differential pressure-free switchable plug valve, which has the following beneficial effects:
1. when the plug valve is used, after the valve core rotates, the central line of the flow passage is perpendicular to the central line of the valve body, at the moment, the valve core is in a sealing working state to prevent underground high-pressure fluid from passing through the fluid passages on the upper valve seat and the lower valve seat, at the moment, the pressure stabilizing structure arranged on the upper valve seat guides the underground high-pressure fluid into the upper valve seat to be contacted with the valve core, so that the sealing surfaces on the two symmetrical sides of the valve core are both in the same high-pressure fluid, the two sides of the valve core have no pressure difference, the problem that the plug valve is difficult to open due to overlarge friction force generated between the valve core and the upper valve seat when the valve core is stressed can be solved, and the phenomenon of eccentric wear is generated between the valve core and the upper valve seat, so that the working stability of the plug valve can be increased, and the sealing mechanism arranged on the lower valve seat can be tightly contacted with the side wall of the valve core through the high-pressure fluid pressing sealing component, and the sealing component is tightly contacted with the valve core, and the sealing property of the plug valve is ensured.
2. The invention is provided with the pressure stabilizing structure, when the valve core is in a sealed working state, high-pressure fluid in the well passes through the through hole and enters the pressure stabilizing channel, the valve core and the upper valve seat are extruded when the fluid pressure in the pressure stabilizing channel is increased, the circumferential fluid pressure born by the upper end of the valve core is basically the same as the pressure born by the lower end of the valve core, in addition, the high-pressure fluid in the pressure stabilizing channel enters the overflow groove, after the valve core rotates by 90 degrees, the opening of the liquid inlet on the cylinder faces upwards and is communicated with the overflow groove, at the moment, the high-pressure fluid enters the cavity in the cylinder, as one side of the cylinder is arranged into a plane, the high-pressure fluid can generate eccentric force in the cylinder, and the eccentric force is opposite to the stress direction of the lower end of the valve core, so that the pressure of the lower end of the valve core is counteracted through the cooperation of the shaft pin and the cylinder, and the valve core is in a working environment without pressure difference.
3. When the sealing mechanism is used, high-pressure fluid in the pit passes through the inclined hole to extrude the plunger, the plunger is stressed to extrude the second flaring part on the second sealing element, so that the flaring part of the second sealing element is tightly contacted with the valve core by utilizing the high-pressure fluid in the pit, the bulge arranged on the arc rod can shade the opening of the inclined hole to prevent the plunger from falling off during working, the sealing performance between the upper valve seat and the lower valve seat and the valve body can be improved by the first sealing ring arranged in the valve body, and the second sealing ring arranged in the valve body can generate enough sealing performance with the first sealing element and the second sealing element, so that when the flaring part of the first sealing element and the second sealing element is worn with the valve core, the sealing assembly can generate certain displacement to ensure the sealing performance with the valve core.
Drawings
FIG. 1 is a schematic diagram of a kelly non-differential pressure switchable plug valve according to the present invention;
FIG. 2 is a cross-sectional view of FIG. 1 of a kelly non-differential switchable plug valve in accordance with the present invention;
FIG. 3 is a cross-sectional view of the valve body of the kelly non-differential switchable plug valve in accordance with the present invention;
FIG. 4 is a schematic cross-sectional view of the upper valve seat, lower valve seat and arcuate shank of the kelly non-differential pressure openable plug valve of the present invention;
FIG. 5 is a cross-sectional view of the upper valve seat and the lower valve seat of the kelly non-differential pressure openable plug valve according to the present invention;
FIG. 6 is a schematic diagram of the upper valve seat in the kelly non-differential pressure switchable plug valve according to the present invention;
FIG. 7 is a schematic diagram of the structure of the lower valve seat in the kelly non-differential pressure switchable plug valve according to the present invention;
FIG. 8 is a bottom view of the upper valve seat in the kelly non-differential pressure openable plug valve of the present invention;
FIG. 9 is a cross-sectional view I of a valve body in a kelly non-differential switchable plug valve in accordance with the present invention;
FIG. 10 is a second cross-sectional view of the valve body of the kelly non-differential switchable plug valve of the present invention;
FIG. 11 is a schematic diagram of the cylinder and pin of the kelly non-differential pressure switchable plug valve according to the first embodiment of the present invention;
FIG. 12 is a schematic diagram II of the cylinder and pin of the kelly non-differential switchable plug valve according to the present invention;
FIG. 13 is a schematic view of the first seal in the kelly non-differential switchable plug valve of the present invention;
FIG. 14 is a schematic view of the second seal in the kelly non-differential switchable plug valve of the present invention.
In the figure: 1. a valve body; 2. a sealing plate; 3. a cylinder; 4. an arc-shaped rod; 5. a boss; 6. a second seal; 7. a flow-through channel; 8. a valve core; 9. a first seal; 10. a positioning ring; 11. a first seal ring; 12. a plunger; 13. a second seal ring; 14. inclined holes; 15. a protrusion; 16. a lower valve seat; 17. a fixed table; 18. an upper valve seat; 19. a positioning block; 20. a regulated pressure channel; 21. a through hole; 22. a positioning groove; 23. a diversion trench; 24. a shielding part; 25. a flow trough; 26. a hexagonal prism; 27. a rubber ring; 28. and a liquid inlet hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
referring to the accompanying drawings 1-14, the kelly bar differential pressure-free switchable plug valve comprises a valve body 1, a lower valve seat 16, an upper valve seat 18 and a valve core 8, wherein opposite ends of the lower valve seat 16 and the upper valve seat 18 are provided with grooves which are matched with the side walls of the valve core 8, fluid channels are respectively arranged in the centers of the upper valve seat 18 and the lower valve seat 16, the side walls of the valve core 8 are vertically provided with a through-flow channel 7, the side walls of the upper valve seat 18 are provided with pressure stabilizing structures, and the pressure stabilizing structures guide underground high-pressure fluid into the upper valve seat 18 to be contacted with the valve core 8, so that the symmetrical sealing surfaces on two sides of the valve core 8 are all in the same high-pressure fluid;
the lateral wall of lower disk seat 16 is equipped with sealing mechanism, sealing mechanism utilizes high-pressure fluid to compress tightly sealing component and case 8 contact, make sealing component and case 8 lateral wall in close contact, sealing component includes first sealing member 9 and second sealing member 6, case 8's lateral wall symmetry is connected with two pivot, two pivot all rotate and connect the lateral wall at valve body 1, and the one end that valve body 1 was kept away from to the pivot links to each other with case 8's lateral wall, be equipped with boss 5 in the valve body 1, boss 5's top is equipped with spacing platform, spacing platform and the upper end corner joint of last disk seat 18, the upper end of going up disk seat 18 is equipped with holding ring 10, holding ring 10 cup joints in valve body 1.
When the plug valve is used, after the valve core 8 rotates, the center line of the through flow channel 7 is perpendicular to the center line of the valve body 1, at the moment, the valve core 8 is in a sealing working state to prevent underground high-pressure fluid from passing through the fluid channels on the upper valve seat 18 and the lower valve seat 16, at the moment, the pressure stabilizing structure arranged on the upper valve seat 18 guides the underground high-pressure fluid into the upper valve seat 18 to be contacted with the valve core 8, so that the symmetrical sealing surfaces on two sides of the valve core 8 are in the same high-pressure fluid, and no pressure difference exists on the two sides of the valve core 8, thus the problems that excessive friction force is generated between the valve core 8 and the upper valve seat 18 when the valve core 8 is stressed, and the plug valve is difficult to open are solved, and the phenomenon of eccentric wear is generated between the valve core 8 and the upper valve seat 18, so that the working stability of the plug valve can be increased, and the sealing mechanism arranged on the lower valve seat 16 can be tightly contacted with the side wall of the valve core 8 through the high-pressure fluid.
Example 2: the difference is based on example 1;
referring to fig. 2-14, the pressure stabilizing structure comprises a plurality of pressure stabilizing channels 20 formed on the side wall of the upper valve seat 18, the pressure stabilizing channels 20 are communicated with grooves on the upper valve seat 18, through holes 21 are formed in the upper end and the lower end of the lower valve seat 16 in a penetrating mode, the opening of the upper end of each through hole 21 corresponds to the position of each pressure stabilizing channel 20, two arc-shaped notches are symmetrically formed in one side, opposite to the upper valve seat 18 and the lower valve seat 16, of each arc-shaped notch is matched with the side wall of a shaft pin, a rubber ring 27 is embedded in the side wall of the shaft pin, the rubber ring 27 is clamped in the arc-shaped notch, a plurality of positioning blocks 19 are arranged at the upper end of the lower valve seat 16, the through holes 21 penetrate through the upper ends of the positioning blocks 19, a plurality of positioning grooves 22 are formed in the lower end of the upper valve seat 18, the positioning grooves 22 are communicated with the pressure stabilizing channels 20, and the positioning grooves 22 are clamped with the positioning blocks 19;
the first sealing element 9 is arranged in the upper valve seat 18, the second sealing element 6 is arranged in the lower valve seat 16, one side of the first sealing element 9 is provided with a first sealing part, the first sealing part is sleeved with a fluid channel on the upper valve seat 18, the other side of the first sealing element 9 is provided with a first expansion part matched with the side wall of the valve body 1, one side of a groove on the upper valve seat 18 is provided with a plurality of diversion grooves 23, the diversion grooves 23 are communicated with the pressure stabilizing channel 20, the first expansion part extends to a notch of the diversion grooves 23, one end of a shaft pin is fixedly connected with a cylinder 3, the side wall of the valve body 1 is sleeved with the cylinder 3 through an assembly hole, one end of the shaft pin far away from the cylinder 3 is provided with a hexagonal prism 26, the side wall of the valve core 8 is sleeved with the hexagonal prism 26 through a hexagonal hole, the side wall of the valve body 1 is symmetrically and fixedly connected with two sealing plates 2 through bolts, the side wall of one sealing plate 2 is contacted with one end of the cylinder 3, one end of the shaft is rotationally connected with a rotating shaft through a sealing bearing, one end of the rotating shaft is provided with a blind hole with an inner hexagonal structure, and the other end of the rotating shaft is fixedly connected with one end of the cylinder 3;
the inside cavity that is equipped with of cylinder 3, the plane has been vertically seted up to one side of cylinder 3, and the feed liquor hole 28 has been seted up to the opposite side of cylinder 3, and feed liquor hole 28 and cavity intercommunication, have seted up in the valve body 1 and have crossed chute 25, and cross chute 25's one side and mounting hole intercommunication, and the opposite side of chute 25 is equipped with shielding portion 24, and shielding portion 24 cooperatees with cylinder 3's lateral wall.
When the valve core 8 is in a sealed working state, high-pressure fluid in the well passes through the through hole 21 and enters the pressure stabilizing channel 20, the valve core 8 and the upper valve seat 18 are extruded when the fluid pressure in the pressure stabilizing channel 20 is increased, the upper end of the valve core 8 is subjected to the circumferential fluid pressure which is basically the same as the pressure which passes through the fluid channel and acts on the lower end of the valve core 8, in addition, the high-pressure fluid in the pressure stabilizing channel 20 enters the through groove 25, as shown in fig. 2, after the valve core 8 rotates by 90 degrees, the opening of the liquid inlet 28 on the cylinder 3 faces upwards and is communicated with the through groove 25, at the moment, the high-pressure fluid enters the cavity in the cylinder 3, and as one side of the cylinder 3 is arranged to be a plane, the high-pressure fluid can generate eccentric force in the cylinder 3, and the eccentric force is downwards opposite to the stress direction of the lower end of the valve core 8, so that the pressure of the lower end of the valve core 8 is counteracted through the cooperation of the shaft pin and the cylinder 3, and further the valve core 8 is in a working environment without pressure difference.
Example 3: the difference is based on example 1;
referring to fig. 2-8, the sealing mechanism comprises a plurality of inclined holes 14 formed in the lower valve seat 16, the inclined holes 14 are communicated with grooves in the lower valve seat 16, the plunger 12 is sleeved in the inclined holes 14 in a sliding mode, one end of the second sealing piece 6 is provided with a second sealing portion, the second sealing portion is sleeved with a fluid channel in the lower valve seat 16, the other end of the second sealing piece 6 is provided with a second expanding portion, the second expanding portion is matched with the side wall of the valve core 8, one end of the plunger 12 is contacted with one side of the second expanding portion, a fixing table 17 is arranged in the valve body 1, the lower end of the fixing table 17 is flush with the lower end of the lower valve seat 16 and fixedly connected with two arc rods 4 through bolts, and the arc rods 4 are contacted with the lower end of the lower valve seat 16.
One side of the arc-shaped rod 4 is provided with a plurality of bulges 15, one ends of the bulges 15 extend to the opening of the lower end of the inclined hole 14, the inner side of the arc-shaped rod 4 is provided with a plurality of openings, the positions of the openings correspond to the positions of the openings of the inclined hole 14, two first sealing rings 11 are connected in the valve body 1 in a clamping mode through annular grooves, one of the first sealing rings 11 is connected on the side wall of the upper valve seat 18 in a sleeved mode, the other first sealing ring 11 is connected on the side wall of the lower valve seat 16 in a sleeved mode, second sealing rings 13 are embedded in fluid channels of the upper valve seat 18 and the lower valve seat 16, one of the second sealing rings 13 is connected with the first sealing piece 9 in a sleeved mode, and the other second sealing ring 13 is connected with the second sealing piece 6 in a sleeved mode.
When the sealing mechanism is used, high-pressure fluid in the pit passes through the inclined hole 14 to squeeze the plunger 12, the plunger 12 is forced to squeeze the second flaring part on the second sealing element 6, so that the flaring part of the second sealing element 6 can be tightly contacted with the valve core 8 by utilizing the high-pressure fluid in the pit, the opening of the inclined hole 14 can be shielded by the bulge 15 arranged on the arc rod 4, the plunger 12 is prevented from falling off in working, the sealing performance between the upper valve seat 18 and the lower valve seat 16 and the valve body 1 can be improved by the first sealing ring 11 arranged in the valve body 1, and the second sealing ring 13 arranged can generate enough sealing performance with the first sealing element 9 and the second sealing element 6, so that when the flaring part of the first sealing element 9 and the second sealing element 6 is worn with the valve core 8, the sealing assembly can generate certain displacement to ensure the sealing performance with the valve core 8.
It should be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a kelly does not have pressure differential and can switch plug valve, includes valve body (1), lower disk seat (16), goes up disk seat (18) and case (8), its characterized in that: the opposite ends of the lower valve seat (16) and the upper valve seat (18) are provided with grooves, the grooves are matched with the side wall of the valve core (8), the centers of the upper valve seat (18) and the lower valve seat (16) are provided with fluid channels, and the side wall of the valve core (8) is vertically provided with a through-flow channel (7);
the side wall of the valve core (8) is symmetrically connected with two shaft pins, the two shaft pins are both rotationally connected to the side wall of the valve body (1), one end of the shaft pin, which is far away from the valve body (1), is connected with the side wall of the valve core (8), the side wall of the lower valve seat (16) is provided with a sealing mechanism, the sealing mechanism tightly presses a sealing component to be in contact with the valve core (8) by utilizing high-pressure fluid, so that the sealing component is tightly contacted with the side wall of the valve core (8), and the sealing component comprises a first sealing element (9) and a second sealing element (6);
the side wall of the upper valve seat (18) is provided with a pressure stabilizing structure, the pressure stabilizing structure guides underground high-pressure fluid into the upper valve seat (18) to be in contact with the valve core (8), so that two symmetrical side sealing surfaces of the valve core (8) are all in the same high-pressure fluid, the pressure stabilizing structure comprises a plurality of pressure stabilizing channels (20) formed in the side wall of the upper valve seat (18), the pressure stabilizing channels (20) are communicated with grooves formed in the upper valve seat (18), through holes (21) are formed in the upper end and the lower end of the lower valve seat (16) in a penetrating mode, the opening of the upper end of each through hole (21) corresponds to the position of each pressure stabilizing channel (20), two arc-shaped gaps are symmetrically formed in one side, opposite to the lower valve seat (16), of each arc-shaped gap is matched with the side wall of a shaft pin, rubber rings (27) are embedded in the side wall of the shaft pin, and the rubber rings (27) are clamped in the arc-shaped gaps;
the valve is characterized in that the first sealing piece (9) is arranged in the upper valve seat (18), the second sealing piece (6) is arranged in the lower valve seat (16), a cylinder (3) is fixedly connected with one end of the shaft pin, the side wall of the valve body (1) is sleeved with the cylinder (3) through an assembly hole, one end of the shaft pin, which is far away from the cylinder (3), is provided with a hexagonal prism (26), the side wall of the valve core (8) is sleeved with the hexagonal prism (26) through a hexagonal hole, the side wall of the valve body (1) is fixedly connected with two sealing plates (2) through bolts, the sealing plates (2) are in contact with one end of the cylinder (3), one side wall of one sealing plate (2) is rotatably connected with a rotating shaft through a sealing bearing, a blind hole of an inner hexagonal structure is formed in one end of the rotating shaft, the other end of the rotating shaft is fixedly connected with one end of the cylinder (3), a cavity is formed in the inner side of the cylinder (3), one side of the cylinder (3) is vertically provided with a plane, the other side of the cylinder (3) is provided with a liquid inlet hole (28), the liquid inlet hole (28) is communicated with the cavity, the side of the cylinder (3) is provided with a shielding groove (25), and one side of the shielding groove (25) is communicated with the valve body (25).
2. The kelly non-differential pressure switchable plug valve of claim 1, wherein: one side of the first sealing piece (9) is provided with a first sealing part, the first sealing part is sleeved with a fluid channel on the upper valve seat (18), the other side of the first sealing piece (9) is provided with a first expansion part matched with the side wall of the valve body (1), one side of a groove on the upper valve seat (18) is provided with a plurality of diversion trenches (23), the diversion trenches (23) are communicated with the pressure stabilizing channel (20), and the first expansion part extends to a notch of the diversion trenches (23).
3. The kelly non-differential pressure switchable plug valve of claim 1, wherein: the sealing mechanism comprises a plurality of inclined holes (14) formed in the lower valve seat (16), the inclined holes (14) are communicated with grooves in the lower valve seat (16), a plunger (12) is sleeved in the inclined holes (14) in a sliding mode, one end of a second sealing piece (6) is provided with a second sealing part, the second sealing part is sleeved with a fluid channel in the lower valve seat (16), the other end of the second sealing piece (6) is provided with a second expansion part, the second expansion part is matched with the side wall of the valve core (8), and one end of the plunger (12) is in contact with one side of the second expansion part;
the valve is characterized in that a fixed table (17) is arranged in the valve body (1), the lower end of the fixed table (17) is flush with the lower end of the lower valve seat (16), two arc rods (4) are fixedly connected with the lower end of the lower valve seat (16) through bolts, and the arc rods (4) are in contact with the lower end of the lower valve seat (16).
4. The kelly bar differential pressure free switchable plug valve of claim 3, wherein: one side of the arc-shaped rod (4) is provided with a plurality of bulges (15), one ends of the bulges (15) extend to the opening of the lower end of the inclined hole (14), the inner side of the arc-shaped rod (4) is provided with a plurality of openings, and the positions of the openings correspond to the positions of the openings of the inclined hole (14).
5. The kelly non-differential pressure switchable plug valve of claim 1, wherein: the upper end of lower disk seat (16) is equipped with a plurality of locating pieces (19), through-hole (21) run through the upper end of locating piece (19), a plurality of constant head tanks (22) have been seted up to the lower extreme of going up disk seat (18), and constant pressure channel (20) intercommunication in constant head tank (22), constant head tank (22) and locating piece (19) joint.
6. The kelly non-differential pressure switchable plug valve of claim 1, wherein: two first sealing rings (11) are connected in the valve body (1) in a clamping mode through annular grooves, one of the first sealing rings (11) is sleeved on the side wall of the upper valve seat (18), the other of the first sealing rings (11) is sleeved on the side wall of the lower valve seat (16), second sealing rings (13) are embedded in fluid channels of the upper valve seat (18) and the lower valve seat (16), one of the second sealing rings (13) is sleeved with the first sealing piece (9), and the other of the second sealing rings (13) is sleeved with the second sealing piece (6).
7. The kelly non-differential pressure switchable plug valve of claim 1, wherein: be equipped with boss (5) in valve body (1), the top of boss (5) is equipped with spacing platform, spacing platform and the upper end corner joint of last disk seat (18), the upper end of going up disk seat (18) is equipped with holding ring (10), holding ring (10) cup joint in valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311280170.5A CN117005819B (en) | 2023-10-07 | 2023-10-07 | Kelly no-pressure-difference switchable plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311280170.5A CN117005819B (en) | 2023-10-07 | 2023-10-07 | Kelly no-pressure-difference switchable plug valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117005819A true CN117005819A (en) | 2023-11-07 |
| CN117005819B CN117005819B (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311280170.5A Active CN117005819B (en) | 2023-10-07 | 2023-10-07 | Kelly no-pressure-difference switchable plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117005819B (en) |
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| CN218494252U (en) * | 2022-09-27 | 2023-02-17 | 盐城市大冈石油工具厂有限责任公司 | Two-way pressure balance type cock valve opening mechanism |
| CN116146735A (en) * | 2022-10-18 | 2023-05-23 | 浙江超众阀门制造有限公司 | High-temperature dustproof hard sealing floating ball valve |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN117005819B (en) | 2024-01-09 |
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