CN110439505A - A kind of novel cartridge type back-pressure valve - Google Patents
A kind of novel cartridge type back-pressure valve Download PDFInfo
- Publication number
- CN110439505A CN110439505A CN201910778018.7A CN201910778018A CN110439505A CN 110439505 A CN110439505 A CN 110439505A CN 201910778018 A CN201910778018 A CN 201910778018A CN 110439505 A CN110439505 A CN 110439505A
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- Prior art keywords
- tubular spool
- seal receptacle
- valve
- cartridge type
- valve body
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- 238000007789 sealing Methods 0.000 claims description 38
- 238000003825 pressing Methods 0.000 claims description 20
- 230000006978 adaptation Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 59
- 239000012530 fluid Substances 0.000 abstract description 20
- 238000013461 design Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 41
- 238000010586 diagram Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000002265 prevention Effects 0.000 description 11
- 241001074085 Scophthalmus aquosus Species 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000008267 milk Substances 0.000 description 6
- 210000004080 milk Anatomy 0.000 description 6
- 235000013336 milk Nutrition 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007787 solid 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sliding Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of novel cartridge type back-pressure valves, belong to the back-pressure valve technical field of drilling well.The novel cartridge type back-pressure valve of one kind of the invention, including hollow valve body and tubular spool and seal receptacle, the seal receptacle is fixed to be assemblied in valve body, and the upper section of tubular spool is movable to pass through seal receptacle；The upper section of tubular spool above seal receptacle is equipped with actuating mechanism, and the middle and lower sections of the tubular spool below seal receptacle are equipped with rebounding mechanism, so that tubular spool can move up and down to realize truncation/conducting of valve body relative to seal receptacle.Using the novel cartridge type back-pressure valve of one kind of the invention, " actuating mechanism " that the present invention designs is set to outside the upper section of tubular spool, is not at fluid by the way that in circulation passage, reliability is higher, and service life is higher, has the function of from grouting and well blowout preventing function.
Description
Technical field
The present invention relates to a kind of back-pressure valve, especially a kind of novel cartridge type back-pressure valve belongs to the back-pressure valve skill of drilling well
Art field.
Background technique
In each task of oil exploration and oil field development, drilling well is played a very important role, but in drilling
In engineering, phenomena such as being frequently encountered well kick, blowout.When strata pressure is more than mud liquid column hydrostatic pressure, strata pressure very may be used
Mud can be pushed to spray upwards along drill string hydrophthalmia, rotary hose may be sprained bad because of high pressure, and be likely occurred serious well
Spray accident needs a large amount of mud to be pressurized at this time, so that rig floor becomes in disorder, and the oil gas of underground sprays, and causes
The pollution of environment.
When finding well kick, blowout sign, carry out closing well and kill-job operation rapidly and efficiently is to effectively reduce gas blowout accident
Important guarantee.And it is mounted on the effective tool that the check-valves on drill string is drilling pipe internal prevention.Conventional drilling tool check valve in the past
Including arrow-shaped check valve, ball check valve, drop-in check valve, butterfly shaped check valve etc., there are the following problems for these check-valves: 1,
Channel area of passage is less than normal, is easy blocking, influences drillng operation；2, it is easy to produce Choking phenomenon, accelerates rushing for check-valves part
Erosion is shortened and uses the time；3, need to determine well depth quantitatively to the drilling tool on check-valves top due to stopping the Truncation of valve when lower brill
Interior hydrophthalmia drilling fluid charge, influences running speed and downhole safety.
Traditional check-valves does not adapt to the requirement of drilling safety, needs to design a new back-pressure valve, it is ensured that when lower brill
Overflow not easy to produce when automatically drilling fluid is perfused, pulls out of hole to the interior hydrophthalmia of check-valves top drilling tool；Special operation (such as leak stopping)
When be not easy to plug；It is not likely to produce throttling, internal part erosion reduces, sealed reliable, long service life.
To solve the above-mentioned problems, Chinese patent ZL201120184474.8 provides a kind of cylindrical pressure return valve.The tubular
Back-pressure valve includes valve body, and the inner cavity of valve body is equipped with valve seat and direction set, and tubular spool is located between valve seat and direction set, tubular
Spool is guiding with direction set, realizes its function.
But in cylindrical pressure return valve provided by ZL201120184474.8, tubular spool is in its whole shift motion
It is inside in free state, during blowout occurs, tubular spool can not be moved up in time and be closed immediately to realize by Fluid pressure
Close the probability of function be to a certain extent it is existing, so as to cause accident that cannot be taken precautions against in time.
To solve the above-mentioned problems, Chinese patent ZL201820265908.9 provides a kind of cylindrical pressure return valve, in side
" assembling structure " is devised to increasing between set and cartridge type spool, realizes its function of closing immediately.
But in cylindrical pressure return valve provided by ZL201820265908.9, " assembling structure " is that design covers in direction
On, it is located at fluid and passes through in circulation passage, be directly exposed in fluid, is easy to be washed away by fluid, causes to wear, so that
The case where " assembling structure " is likely to occur failure reduces back-pressure valve reliability, reduces service life.
Summary of the invention
Goal of the invention of the invention is: in view of the above problems, providing a kind of novel cartridge type back-pressure valve, this hair
" actuating mechanism " of bright design is set to outside the upper section of tubular spool, is not at fluid by the way that in circulation passage, reliability is higher, makes
It is higher with the service life.
The technical solution adopted by the invention is as follows:
A kind of novel cartridge type back-pressure valve, including hollow valve body and tubular spool and seal receptacle, the seal receptacle is solid
Fixed is assemblied in valve body, and the upper section of tubular spool is movable to pass through seal receptacle；
The upper section of tubular spool above seal receptacle is equipped with actuating mechanism, in the tubular spool below seal receptacle
Lower section is equipped with rebounding mechanism, so that tubular spool can move up and down to realize truncation/conducting of valve body relative to seal receptacle；
The actuating mechanism includes turning sleeve, guide-localization set, sliding sleeve；
The upper section periphery of turning sleeve has the thrust of N number of top surface inclination with the steering block of M top surface inclination, lower section periphery
Block；
The inner wall of guide-localization set offers M guide groove, N number of reversing groove, the lower end of each reversing groove it is same laterally
Offer the locating slot of top surface inclination, locating slot adaptation corresponding with thrust block；
The lower end periphery of sliding sleeve has the drive block of M inclined bottom surface, drive block adaptation corresponding with steering block；Its
In,
Turning sleeve is fixed to be covered outside the upper section of tubular spool；
Guide-localization set is fixed to be covered in valve body, and guide-localization set is located on the outside of turning sleeve, and the steering block of turning sleeve is sliding
Dynamic insertion guide groove, the thrust block of turning sleeve are slidingly nested in reversing groove, and moving down, when rotating turning sleeve thrust block can turn
Enter locating slot；
Sliding sleeve sliding covers outside the upper section of tubular spool, and the drive block of sliding sleeve is slidingly nested in guide groove and presses
On the steering block of turning sleeve；
When being located at thrust block in reversing groove, rebounding mechanism makes tubular spool and seal receptacle press sealing to realize valve body
Truncation；
When being located at thrust block in locating slot, rebounding mechanism is locked in thrust block in locating slot, at this time tubular spool
The conducting of valve body is realized with gap e between seal receptacle.
Cartridge type back-pressure valve of the invention, which exists, opens on state (cartridge type back-pressure valve opening) and closing sealing state (cartridge type
Back-pressure valve is closed), the action process principle of cartridge type back-pressure valve state conversion is as follows:
When cartridge type back-pressure valve is in and closes under sealing state, thrust block is located in reversing groove, in the effect of rebounding mechanism
Under, tubular spool and seal receptacle pressing seal the truncation for realizing valve body, and cartridge type back-pressure valve, which is in, closes sealing state (in other words
Normally off)；
When first applying downward active force to tubular spool and applying the active force of circumferencial direction (as clockwise) again；It is right first
Tubular spool applies downward active force, and cylindrical valve core ribbon moves reversing groove that the thrust block of turning sleeve is covered along guide-localization to downslide
Dynamic, when thrust block slides down to beside locating slot, rotation tubular spool applies the work of circumferencial direction (as clockwise) to it
Firmly, so that thrust block is transferred to locating slot, stop after applying active force, under the action of rebounding mechanism, the top surface of thrust block with
The top surface of locating slot fits, so that thrust block is locked in locating slot, so that having gap e between tubular spool and seal receptacle
Realize the conducting of valve body；It (is opened normal on state that is, cartridge type back-pressure valve of the invention at this time is in unlatching on state
Open state)；
When applying downward active force to sliding sleeve, the drive block of sliding sleeve pushes the steering block slide downward of turning sleeve,
Since drive block and steering block are in contact of incline plane relationship, then drive block will apply circumferencial direction (as counterclockwise) to steering block
Active force, so that thrust block is produced from locating slot to reversing groove, stops application effect so that turning sleeve slide downward and rotating
After power, under the action of rebounding mechanism, thrust block is along reversing groove upward sliding, so that tubular spool is relative to seal receptacle to moving up
It moves to the truncation for realizing valve body with seal receptacle pressing sealing；That is, cartridge type back-pressure valve of the invention at this time reverts to closing sealing
State (normally off in other words)；
Lasting active force when applying downward active force to tubular spool, without applying circumferencial direction (as clockwise)
When, tubular spool is moved down relative to seal receptacle, so that between tubular spool and seal receptacle there is gap e to realize valve body
Conducting；That is, cartridge type back-pressure valve of the invention at this time, which is in, opens on state (open on state and opened state)；
If make tubular spool by upward relatively noticeable effort from the lower part of cartridge type back-pressure valve at this time, in upward effect
Under the action of power, so that tubular spool is moved upward to relative to seal receptacle realizes cutting for valve body with seal receptacle pressing sealing
It is disconnected；That is, cartridge type back-pressure valve of the invention at this time reverts to closing sealing state again.
When carrying out drillng operation using cartridge type back-pressure valve of the invention, cartridge type back-pressure valve is mounted in drilling tool:
Cartridge type back-pressure valve is set to be in normally open (opening the normally open on state) first, in the process of lower brill
In, enter barrel valve when the mud of cartridge type spool lower part is moved down with cartridge type back-pressure valve, by the circulation passage of barrel valve in-core
The function of automatic grouting is realized on core top.In going down process, when blowout or well kick occurs, then passing through drilling tool water immediately
Eye grouting pressurization (or moment quickly above proposes drilling tool a small distance) at the top of drilling tool, so that mud is downward to sliding sleeve application
Active force, under the action of actuating mechanism, cartridge type back-pressure valve is converted to close off sealing state from normally open, realizes lower brill
Blowout prevention function in the process.After blowout or well kick release, drilling tool lifting to ground, until environment is suitable again through investigation in well
When carrying out drillng operation, so that cartridge type back-pressure valve is in normally open again, re-start the process of lower brill.
When drilling tool transfers to suitable position, when being ready for drilling process, it is in the milk at the top of drilling tool by drilling tool water hole
Pressurization (or moment quickly above proposes drilling tool a small distance) is acting so that mud applies downward active force to sliding sleeve
Under the action of mechanism, cartridge type back-pressure valve is converted to close off sealing state from normally open；So that cylindrical pressure return valve routine back-pressure valve
The reversed function of closing drilling tool water hole；It can prevent underground overflow from overflowing the anti-of ground by hydrophthalmia in drilling tool in drilling process
Spray function.Specifically, in drilling process, according to the requirement of drillng operation, it is often necessary to be filled by cylindrical pressure return valve to underground
Slurry, the grouting pressurization at the top of drilling tool by drilling tool water hole at this time, so that mud applies downward active force, tubular to tubular spool
Spool is moved down relative to seal receptacle, so that realizing the conducting of valve body, cylinder between tubular spool and seal receptacle with gap e
Type back-pressure valve is in the state that opened (open on state and opened state), it can be achieved that passing through cylindrical pressure return valve to underground
The purpose of grouting.In drilling process, when blowout or well kick occur for underground, tubular spool lower part mud will push tubular
Spool moves up, and tubular spool moves up the truncation that valve body is realized with seal receptacle pressing sealing, closes cartridge type back-pressure valve close
Envelope, realizes the blowout prevention function in drilling process.
Preferably, M and N is greater than the positive integer equal to 2, and M=N.
Further, M guide groove is with N number of reversing groove in alternatively distributed.
Preferably, the actuating mechanism further includes limited cap, and what limited cap was fixed is assemblied in guide-localization set upper side and position
Between guide-localization set and sliding sleeve, and limited cap is located above the drive block of sliding sleeve, skids off upwards to avoid sliding sleeve.
Preferably, the actuating mechanism further includes sliding cap, the fixed upper end for being assemblied in sliding sleeve of the sliding cap.Energy
Enough increase active area when fluid applies downward active force to sliding sleeve, improves reliability of the invention.
Alternative, the rebounding mechanism includes direction set, the elastic element below tubular spool, direction set
Roof is equipped with pilot hole, and the lower section of shaped seals valve is guide rod portion；Wherein,
The direction set is assemblied in valve body, and in the pilot hole of the direction of insertion set of guide rod portion sliding, elastic element covers
Outside guide rod portion, and the upper end that the both ends of elastic element are covered with the middle section of shaped seals valve, direction respectively is connected, to provide upwards
Screen resilience.
Further, the roof of direction set or/and side wall are equipped with flowing hole one, the upper and lower to conducting direction set
Body cavity.
Further, the middle section of shaped seals valve is the tapered portion for sealing；The tapered portion and seal receptacle of tubular spool
Pressing seals the truncation to realize valve body.When valve body is in truncation state, tapered portion and seal receptacle pressing are sealed；Valve body is in and leads
When logical state, there is gap e between the tapered portion and seal receptacle of tubular spool.
Further, the upper section of shaped seals valve is cylindrical part, and the side wall of cylindrical part offers flowing hole two.Valve body is in
When on state, seal receptacle is connected by the gap e between flowing hole two and tubular spool and seal receptacle in the inner cavity of cylindrical part
The body cavity of lower section.
Preferably, the upper end of tubular spool offers multiple notches, in order to rotate tubular spool.In order to make novel cylinder
Type back-pressure valve is in normally open, then need to apply tubular spool the active force of downward active force and circumferencial direction,
Downward active force directly pushes tubular spool and can be realized, for the ease of applying the active force of circumferencial direction to tubular spool,
To rotate tubular spool, therefore the design is proposed, when using the design, make a fork, is inserted into the fork item of fork
In each notch, rotation fork can rotate tubular spool.
Alternative, the seal receptacle includes gasket, valve seat；Wherein,
Valve seat is fixed to be assemblied in valve body, and gasket is pressed in below；The gasket of tubular spool and seal receptacle
Pressing seals the truncation to realize valve body；
Alternatively,
Valve seat is fixed to be assemblied in valve body, in the annular groove that the inner wall that gasket is assemblied in valve seat opens up；Tubular spool
Gasket pressing with seal receptacle seals the truncation to realize valve body.When valve body is in truncation state, tubular spool and seal receptacle
Gasket press sealing；When valve body is in the conductive state, there is gap between the gasket of tubular spool and seal receptacle, valve seat
e。
Further, the seal receptacle further includes pressure cap, and pressure cap is fixed to be assemblied in valve body, and is pressed in above valve seat,
It is assemblied in valve body so that valve seat is fixed.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
The novel cartridge type back-pressure valve of one kind of the invention, when carrying out drillng operation using cartridge type back-pressure valve of the invention, In
During lower brill, the function being in the milk upwards automatically can be realized, and have the function of the blowout prevention in going down process；In drilling process
In, it can be realized the function being in the milk to underground, and have the function of the blowout prevention in drilling process, reliability of the present invention is higher, uses
Longer life expectancy has biggish fluid flow passageway, can be avoided the blocking of cartridge type back-pressure valve, guarantee drilling operation normally into
Row.
For ZL 201120184474.8, the tubular spool of the patent is located in its all shift motion
In free state, tubular spool can not be moved up in time blowout process medium fluid pressure occurs to realize instant closing function
The problem of probability exists to a certain extent.And of the invention there is rebounding mechanism can overcome this problem.And have benefited from
The specific design of " actuating mechanism " of the invention, cartridge type back-pressure valve can have various states, and (such as normally open is opened shape
State, normally off), suitable for the operation under various operating conditions, practicability is stronger, relatively reliable.
For ZL201820265908.9, the knot of " assembling structure " of the patent and " actuating mechanism " of the invention
Configuration formula difference is huge, and technical effect is also different, in use, two kinds of cartridge type back-pressure valve action process are also not quite similar.The patent
Normally open be by tubular spool gravity and formed, in going down process, if the mud of cartridge type back-pressure valve lower part
Pressure is excessive to be easy to appear the case where accidentally closing；And normally open of the invention is thrust block lock under the action of rebounding mechanism
Due in locating slot, be not in accidentally close the case where.And " actuating mechanism " that the present invention designs is set to tubular spool
Upper section is outer (particularly between the upper section and valve body of tubular spool), is not at fluid by that can keep away in circulation passage
Exempt from fluid to wash away " actuating mechanism ", reliability is higher, and the service life is longer.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is that cartridge type back-pressure valve of the invention is in the schematic diagram for closing sealing state；
Fig. 2 is that cartridge type back-pressure valve of the invention is in the schematic diagram for opening on state；
Fig. 3 is enlarged drawing at the A of Fig. 2；
Fig. 4 is the deformation schematic diagram of Fig. 3；
Fig. 5 is the assembly relation schematic diagram of tubular spool, seal receptacle, turning sleeve；
Fig. 6 is the fractionation schematic diagram of turning sleeve, guide-localization set, sliding sleeve；
Fig. 7 is the positional diagram of sliding sleeve and turning sleeve when cartridge type back-pressure valve is in and closes sealing state；
Fig. 8 is the positional diagram of sliding sleeve and turning sleeve when cartridge type back-pressure valve is in and opens on state；
Fig. 9 is the structural schematic diagram of turning sleeve；
Figure 10 is the structural schematic diagram of guide-localization set；
Figure 11 is the structural schematic diagram of sliding sleeve；
Figure 12 is the structural schematic diagram of direction set；
Figure 13 is the structural schematic diagram of tubular spool.
Marked in the figure: 1- valve body, the direction 2- set, 21- pilot hole, 22- flowing hole one, 3- elastic element, 4- tubular spool,
41- guide rod portion, 42- tapered portion, 43- cylindrical part, 44- flowing hole two, 45- notch, 5- seal receptacle, 50- washer, 51- gasket,
52- valve seat, 53- pressure cap, 54- sealing ring, 6- turning sleeve, 61- steering block, 62- thrust block, 7- guide-localization set, 71- guiding
Slot, 72- reversing groove, 73- locating slot, 8- sliding sleeve, 81- drive block, 9- limited cap, 10- sliding cap, 11- fixed pin.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
.
As shown in figure 1 to figure 13, the novel cartridge type back-pressure valve of one kind of the present embodiment, including hollow valve body 1 and cylinder
Shape spool 4 and seal receptacle 5, the seal receptacle 5 is fixed to be assemblied in valve body 1, and the upper section of tubular spool 4 is movable to pass through sealing
Seat 5；The upper section of tubular spool 4 above seal receptacle is equipped with actuating mechanism, in the tubular spool 4 below seal receptacle under
Section is equipped with rebounding mechanism, so that tubular spool 4 can move up and down to realize truncation/conducting of valve body relative to seal receptacle 5；
The actuating mechanism includes turning sleeve 6, guide-localization set 7, sliding sleeve 8；The upper section periphery of turning sleeve 6 has M top surface inclination
Steering block 61, lower section periphery have N number of top surface inclination thrust block 62；The inner wall of guide-localization set 7 offers M guide groove
71, N number of reversing groove 72, the same locating slot 73 for laterally offering top surface inclination of the lower end of each reversing groove 72, locating slot 73
Adaptation corresponding with thrust block 62；The lower end periphery of sliding sleeve 8 have M inclined bottom surface drive block 81, drive block 81 with turn
To the corresponding adaptation of block 61；Wherein, turning sleeve 6 is fixed covers outside the upper section of tubular spool 4；The fixed set of guide-localization set 7
In valve body 1, guide-localization set 7 is located at 6 outside of turning sleeve, and the steering block 61 of turning sleeve is slidingly nested in guide groove 71, turns to
The thrust block 62 of set is slidingly nested in reversing groove 72, and moving down can make thrust block 62 be transferred to locating slot 73 when rotating turning sleeve 6；It is sliding
Dynamic 8 sliding of set covers outside the upper section of tubular spool 4, and the drive block 81 of sliding sleeve, which is slidingly nested in guide groove 71 and is pressed in, to be turned
To on the steering block 61 of set；When being located at thrust block 62 in reversing groove 72, rebounding mechanism presses tubular spool 4 and seal receptacle 5
Sealing is closed to realize the truncation of valve body；When being located at thrust block 62 in locating slot 73, rebounding mechanism is locked in thrust block 62
In locating slot 73, the conducting of valve body is realized between tubular spool 4 and seal receptacle 5 with gap e at this time.It will be evident that locating slot
73 also have it is N number of.Guide-localization set 7 has an external screw thread, and guide-localization set 7 is connected through a screw thread that mode is fixed to be covered in valve body 1.
Turning sleeve 6 has an internal screw thread, and turning sleeve 6 is connected through a screw thread that mode is fixed to be covered outside the upper section of tubular spool 4, turns to improve
To the fixed effect of set 6, also it is connected by fixed pin 11 between turning sleeve 6 and tubular spool 4.
Cartridge type back-pressure valve of the invention, which exists, opens on state (cartridge type back-pressure valve opening) and closing sealing state (cartridge type
Back-pressure valve is closed), the action process principle of cartridge type back-pressure valve state conversion is as follows:
When cartridge type back-pressure valve is in and closes under sealing state, thrust block 62 is located in reversing groove 72, in rebounding mechanism
Under effect, tubular spool 4 and the pressing of seal receptacle 5 seal the truncation for realizing valve body, and cartridge type back-pressure valve, which is in, closes sealing state
(normally off in other words), as shown in Figure 1；
When first applying downward active force to tubular spool 4 and applying the active force of circumferencial direction (as clockwise) again；First
Apply downward active force, the reversing groove that tubular spool 4 drives the thrust block 62 of turning sleeve to cover along guide-localization to tubular spool 4
72 slide downwards, when thrust block 62 slides down to 73 side of locating slot, rotation tubular spool 4 applies circumferencial direction to it
The active force of (as clockwise) stops after applying active force, so that thrust block 62 is transferred to locating slot 73 in the effect of rebounding mechanism
Under, the top surface of thrust block 62 and the top surface of locating slot 73 fit, so that thrust block 62 is locked in locating slot 73, so that tubular
The conducting of valve body is realized between spool 4 and seal receptacle 5 with gap e；It is opened that is, cartridge type back-pressure valve of the invention at this time is in
On state (opens the normally open on state), as shown in Figure 2；
When applying downward active force to sliding sleeve 8, the drive block 81 of sliding sleeve pushes the steering block 61 of turning sleeve downward
Sliding, since drive block 81 and steering block 61 are in contact of incline plane relationship, then drive block 81 will apply circumference side to steering block 61
To the active force of (as counterclockwise), so that 6 slide downward of turning sleeve and rotate, so that thrust block 62 is produced from locating slot 73 to changing
Into slot 72, stop apply active force after, under the action of rebounding mechanism, thrust block 62 along 72 upward sliding of reversing groove so that
Tubular spool 4 is moved upward to the truncation that valve body is realized with the pressing sealing of seal receptacle 5 relative to seal receptacle 5；That is, this hair at this time
Bright cartridge type back-pressure valve, which reverts to, closes sealing state (normally off in other words), as shown in Figure 1；
Lasting effect when applying downward active force to tubular spool 4, without applying circumferencial direction (as clockwise)
When power, tubular spool 4 is moved down relative to seal receptacle 5, so that between tubular spool 4 and seal receptacle 5 there is gap e to realize
The conducting of valve body；It (opens on state that is, cartridge type back-pressure valve of the invention at this time is in unlatching on state and is opened shape
State), as shown in Figure 2；
If make tubular spool 4 by upward relatively noticeable effort from the lower part of cartridge type back-pressure valve at this time, in upward work
Under the action of firmly, so that tubular spool 4 is moved upward to relative to seal receptacle 5 realizes valve body with the pressing sealing of seal receptacle 5
Truncation；That is, cartridge type back-pressure valve of the invention at this time reverts to closing sealing state, as shown in Figure 1 again.
Preferably, in one embodiment, M and N is greater than the positive integer equal to 2, and M=N.Steering block 61 stops
Pushing block 62, guide groove 71, reversing groove 72, locating slot 73, drive block 81 are all circumferentially array distributions.The width of drive block 81
Greater than the width of steering block 61.It is mutual dislocation between steering block 61 and thrust block 62.In one embodiment, M=N=
4, that is, steering block 61, thrust block 62, guide groove 71, reversing groove 72, locating slot 73, drive block 81 are all 4 respectively.
Further, in another embodiment, M guide groove 71 is with N number of reversing groove 72 in alternatively distributed.
Preferably, in one embodiment, as shown in Figure 1 and Figure 2, the actuating mechanism further includes limited cap 9, limit
What cap 9 was fixed is assemblied in guide-localization 7 upper ends of set and is located between guide-localization set 7 and sliding sleeve 8, and limited cap 9 is located at cunning
81 top of drive block of dynamic set, skids off upwards to avoid sliding sleeve 8.Limited cap 9 has external screw thread, and limited cap 9 is connected by screw thread
It connects the fixed guide-localization that is assemblied in of mode and covers 7 upper ends, the upper end of limited cap 9 offers to tighten the multiple of limited cap 9 and lack
Mouthful.
Preferably, in another embodiment, as shown in Figure 1 and Figure 2, the actuating mechanism further includes sliding cap 10, the cunning
The fixed upper end for being assemblied in sliding sleeve 8 of dynamic cap 10.Effect when fluid applies downward active force to sliding sleeve 8 can be increased
Area improves reliability of the invention.Sliding cap 10 has internal screw thread, and sliding cap 10 is connected through a screw thread the fixed assembly of mode
In the upper end of sliding sleeve 8, the upper end of sliding cap 10 offers to tighten multiple notches of sliding cap 10.
Alternative, in one embodiment, shown in as shown in Figure 1, Figure 2, Figure 12, Figure 13, the rebounding mechanism includes
2, elastic element 3 are covered positioned at the direction of the lower section of tubular spool 4, and the roof of direction set 2 is equipped with pilot hole 21, under shaped seals valve
Section is guide rod portion 41；Wherein, the direction set 2 is assemblied in valve body 1, the pilot hole 21 for the direction of insertion set that guide rod portion 41 is slided
It is interior, 3 sets of elastic element outside guide rod portion 41, and the both ends of elastic element 3 respectively with the middle section of shaped seals valve 4, direction set 2
Upper end is connected, to provide upward screen resilience.The mode that direction set 2 can be gap-matched is assemblied in valve body 1, direction
Set 2 can also be connected through a screw thread mode and be assemblied in valve body 1.
Further, shown in as shown in Figure 1, Figure 2, Figure 12, the roof or/and side wall of direction set 2 are equipped with flowing hole 1, to
The body cavity of the upper and lower of conducting direction set 2.
Further, shown in as shown in Figure 1, Figure 2, Fig. 5, Figure 13, the middle section of shaped seals valve 4 is the tapered portion for sealing
42；Tapered portion 42 and seal receptacle 5 pressing of tubular spool 4 seal the truncation to realize valve body.When valve body is in truncation state, cone
Shape portion 42 and the pressing of seal receptacle 5 seal；When valve body is in the conductive state, have between the tapered portion 42 and seal receptacle 5 of tubular spool 4
There is gap e.What the outer diameter of tapered portion 42 was sequentially increased from top to bottom.
Further, shown in as shown in Figure 1, Figure 2, Fig. 5, Figure 13, the upper section of shaped seals valve 4 is cylindrical part 43, cylindrical part 43
Side wall offer flowing hole 2 44.When valve body is in the conductive state, the inner cavity of cylindrical part 43 passes through flowing hole 2 44 and cylinder
The body cavity below seal receptacle is connected in gap e between shape spool and seal receptacle.
Preferably, in one embodiment, shown in as shown in Figure 1, Figure 2, Fig. 5, Figure 13, the upper end of tubular spool 4 is offered
Multiple notches 45, in order to rotate tubular spool.In order to make novel cartridge type back-pressure valve be in normally open, then needing to cylinder
Shape spool 4 applies the active force of downward active force and circumferencial direction, and downward active force directly pushes tubular spool 4
It realizes, for the ease of applying the active force of circumferencial direction to tubular spool 4, to rotate tubular spool, therefore proposes and originally set
Meter, when using the design, makes a fork, is inserted into the fork item of fork in each notch 45, and rotation fork can rotary cylinder
Shape spool.Preferably, notch 45 has 4, circumferentially array distribution, and certain notch 45 can also only have 2,3 or more.
Alternative, in one embodiment, as shown in Figure 1, Figure 2, Figure 3 shows, the seal receptacle 5 includes gasket
51, valve seat 52；Wherein, valve seat 52 is fixed is assemblied in valve body 1, and gasket 51 is pressed in below；Tubular spool 4 with it is close
The pressing of gasket 51 of envelope seat seals the truncation to realize valve body.When valve body is in truncation state, tubular spool 4 and seal receptacle
The pressing sealing of gasket 51；When valve body is in the conductive state, have between the gasket 51 of tubular spool 4 and seal receptacle, valve seat 52
There is gap e.Preferably, seal receptacle 5 further includes washer 50, and washer 50 is pressed in 51 lower section of gasket.
It is alternative, in another embodiment, as shown in figure 4, the seal receptacle 5 includes gasket 51, valve seat 52；Its
In, valve seat 52 is fixed to be assemblied in valve body 1, in the annular groove that the inner wall that gasket 51 is assemblied in valve seat 52 opens up；Cylindrical valve
The pressing of the gasket 51 of core 4 and seal receptacle seals the truncation to realize valve body.When valve body is in truncation state, tubular spool 4 with
The gasket 51 of seal receptacle presses sealing；When valve body is in the conductive state, gasket 51, the valve seat of tubular spool 4 and seal receptacle
There is gap e between 52.
Further, as shown in Figures 1 to 4, the seal receptacle 5 further includes pressure cap 53, and what pressure cap 53 was fixed is assemblied in valve
In body 1, and it is pressed in 52 top of valve seat, is assemblied in valve body 1 so that valve seat 52 is fixed.Pressure cap 53 has external screw thread, pressure cap
53 are connected through a screw thread that mode is fixed to be assemblied in valve body 1, and the upper end of pressure cap 53 offers to tighten the notch of pressure cap 53.
Further, it is tightly connected between seal receptacle 5 and valve seat 52, specifically, the outer wall of the valve seat 52 of seal receptacle 5 opens up
Annular groove be embedded in sealing ring 54, assembly is sealed by sealing ring 54 between 1 inner cavity of valve seat 52 and valve body, such as Fig. 3, is schemed
Shown in 4.
The valve body 1 of cartridge type back-pressure valve, direction set 2, elastic element 3, tubular spool 4, seal receptacle 5, turning sleeve 6, guiding are fixed
Position set 7, sliding sleeve 8, limited cap 9, sliding cap 10 are concentric.
Based on the Combination Design of above-mentioned technical characteristic, in one embodiment, using cartridge type back-pressure valve of the invention into
When row drillng operation, cartridge type back-pressure valve is mounted in drilling tool:
Cartridge type back-pressure valve is set to be in normally open (opening the normally open on state) first, in the process of lower brill
In, enter barrel valve when the mud of cartridge type spool lower part is moved down with cartridge type back-pressure valve, by the circulation passage of barrel valve in-core
The function of automatic grouting is realized on core top.In going down process, when blowout or well kick occurs, then passing through drilling tool water immediately
Eye grouting pressurization (or moment quickly above proposes drilling tool a small distance) at the top of the drilling tool so that mud to sliding sleeve 8 apply to
Under active force, under the action of actuating mechanism, cartridge type back-pressure valve is converted to close off sealing state from normally open, realizes down
Blowout prevention function during brill.After blowout or well kick release, drilling tool lifting to ground, until environment is suitable again through investigation in well
When secondary progress drillng operation, so that cartridge type back-pressure valve is in normally open again, re-start the process of lower brill.
When drilling tool transfers to suitable position, when being ready for drilling process, it is in the milk at the top of drilling tool by drilling tool water hole
Pressurization (or moment quickly above proposes drilling tool a small distance) is acting so that mud applies downward active force to sliding sleeve 8
Under the action of mechanism, cartridge type back-pressure valve is converted to close off sealing state from normally open；So that cylindrical pressure return valve routine back-pressure valve
The reversed function of closing drilling tool water hole；It can prevent the excessive note in underground from overflowing the anti-of ground by hydrophthalmia in drilling tool in drilling process
Spray function.Specifically, in drilling process, according to the requirement of drillng operation, it is often necessary to be filled by cylindrical pressure return valve to underground
Slurry, the grouting pressurization at the top of drilling tool by drilling tool water hole at this time, so that mud applies downward active force, cylinder to tubular spool 4
Shape spool 4 is moved down relative to seal receptacle 5, so that between tubular spool 4 and seal receptacle 5 there is gap e to realize valve body
Conducting, cartridge type back-pressure valve are in the state that opened (open on state and opened state), it can be achieved that by tubular back pressure
The purpose that valve is in the milk to underground.In drilling process, when blowout or well kick occur for underground, 4 lower part mud of tubular spool
Tubular spool 4 will be pushed to move up, tubular spool 4 moves up the truncation for realizing valve body with the pressing sealing of seal receptacle 5, makes cartridge type
Back-pressure valve closes sealing, realizes the blowout prevention function in drilling process.
In conclusion the cartridge type back-pressure valve that one kind of the invention is novel, " actuating mechanism " is set to the upper of tubular spool
Section is outer, is not at fluid by the way that in circulation passage, reliability is higher, and service life is higher.Using cartridge type back-pressure valve of the invention
When, in going down process, tubular spool is in grouting state (that is, cartridge type back-pressure valve is in normally open), can automatically to
The drilling tool water hole on tubular check-valves top fills drilling fluid；When underground overflow occurs in going down process, pass through operational motion
Mechanism can make tubular spool become sealing state (that is, cartridge type back-pressure valve becomes closing sealing state) from grouting state, realize
Blowout prevention function in going down process.Under be drilled into turn on pump after (pump makes mud apply downward work to sliding sleeve by drilling tool water hole
Firmly), so that tubular spool becomes sealing state from grouting state；At this point, drilling tool water hole can be positive unimpeded (because of tubular spool
Can be opened, be realized positive unimpeded), it is reversed to be truncated；In order to carry out drillng operation, and can be prevented in drilling process
The blowout prevention function on ground is overflowed in underground overflow by drilling tool water hole.
In brief, it when carrying out drillng operation using cartridge type back-pressure valve of the invention, in going down process, can be realized certainly
The function being in the milk in trend, and have the function of the blowout prevention in going down process；In drilling process, it can be realized to underground grouting
Function, and have the function of the blowout prevention in drilling process, reliability of the present invention is higher, and the service life is longer, has biggish fluid
Circulation passage can be avoided the blocking of cartridge type back-pressure valve, guarantee that drilling operation is normally carried out.
For ZL 201120184474.8, the tubular spool of the patent is located in its all shift motion
In free state, tubular spool can not be moved up in time blowout process medium fluid pressure occurs to realize instant closing function
The problem of probability exists to a certain extent.And of the invention there is rebounding mechanism can overcome this problem.And have benefited from
The specific design of " actuating mechanism " of the invention, cartridge type back-pressure valve can have various states, and (such as normally open is opened shape
State, normally off), suitable for the operation under various operating conditions, practicability is stronger, relatively reliable.
For ZL201820265908.9, the knot of " assembling structure " of the patent and " actuating mechanism " of the invention
Configuration formula difference is huge, and technical effect is also different, in use, two kinds of cartridge type back-pressure valve action process are also not quite similar.The patent
Normally open be by tubular spool gravity and formed, in going down process, if the mud of cartridge type back-pressure valve lower part
Pressure is excessive to be easy to appear the case where accidentally closing；And normally open of the invention is thrust block lock under the action of rebounding mechanism
Due in locating slot, be not in accidentally close the case where.And " actuating mechanism " that the present invention designs is set to tubular spool
Upper section is outer (particularly between the upper section and valve body of tubular spool), is not at fluid by that can keep away in circulation passage
Exempt from fluid to wash away " actuating mechanism ", reliability is higher, and the service life is longer.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. a kind of novel cartridge type back-pressure valve, described including hollow valve body (1) and tubular spool (4) and seal receptacle (5)
Seal receptacle (5) is fixed to be assemblied in valve body (1), and the upper section of tubular spool (4) is movable to pass through seal receptacle (5)；Its feature exists
In:
The upper section of tubular spool (4) above seal receptacle is equipped with actuating mechanism, the tubular spool (4) below seal receptacle
Middle and lower sections are equipped with rebounding mechanism, so that tubular spool (4) can move up and down to realize cutting for valve body relative to seal receptacle (5)
Disconnected/conducting；
The actuating mechanism includes turning sleeve (6), guide-localization set (7), sliding sleeve (8)；
Steering block (61) of the upper section periphery of turning sleeve (6) with M top surface inclination, lower section periphery have N number of top surface inclination
Thrust block (62)；
The inner wall of guide-localization set (7) offers M guide groove (71), N number of reversing groove (72), the lower end of each reversing groove (72)
Same laterally offer the locating slot (73) of top surface inclination, locating slot (73) adaptation corresponding with thrust block (62)；
The lower end periphery of sliding sleeve (8) has the drive block (81) of M inclined bottom surface, and drive block (81) and steering block (61) are opposite
It should be adapted to；Wherein,
Turning sleeve (6) is fixed to be covered outside the upper section of tubular spool (4)；
Guide-localization set (7) is fixed to be covered in valve body (1), and guide-localization set (7) is located on the outside of turning sleeve (6), turning sleeve
Steering block (61) is slidingly nested in guide groove (71), and the thrust block (62) of turning sleeve is slidingly nested in reversing groove (72), and moves down
Thrust block (62) can be made to be transferred to locating slot (73) when rotating turning sleeve (6)；
Sliding sleeve (8) sliding covers outside the upper section of tubular spool (4), and the drive block (81) of sliding sleeve is slidingly nested in guide groove
(71) it and is pressed on the steering block (61) of turning sleeve；
When make thrust block (62) be located at reversing groove (72) it is interior when, rebounding mechanism presses tubular spool (4) and seal receptacle (5) to seal
To realize the truncation of valve body；
When make thrust block (62) be located at locating slot (73) it is interior when, rebounding mechanism is locked in thrust block (62) in locating slot (73),
Realize the conducting of valve body between tubular spool (4) and seal receptacle (5) with gap e at this time.
2. cartridge type back-pressure valve as described in claim 1, it is characterised in that: M and N is greater than the positive integer equal to 2, and M=
N。
3. cartridge type back-pressure valve as claimed in claim 2, it is characterised in that: M guide groove (71) and N number of reversing groove (72) are submitted
For distribution.
4. cartridge type back-pressure valve as described in claim 1, it is characterised in that: the actuating mechanism further includes limited cap (9), limit
Cap (9) it is fixed be assemblied in guide-localization set (7) upper end and positioned at guide-localization set (7) and sliding sleeve (8) between, and limit
Cap (9) is located above the drive block (81) of sliding sleeve, skids off upwards to avoid sliding sleeve (8).
5. cartridge type back-pressure valve as described in claim 1, it is characterised in that: the actuating mechanism further includes sliding cap (10), institute
State sliding cap (10) fixed upper end for being assemblied in sliding sleeve (8).
6. cartridge type back-pressure valve as described in claim 1, it is characterised in that: the rebounding mechanism includes being located at tubular spool (4)
The direction of lower section covers (2), elastic element (3), and the roof that direction covers (2) is equipped with pilot hole (21), and the lower section of shaped seals valve is
Guide rod portion (41)；Wherein,
The direction set (2) is assemblied in valve body (1), in the pilot hole (21) of the direction of insertion set of guide rod portion (41) sliding, bullet
Property element (3) cover guide rod portion (41) outside, and the both ends of elastic element (3) respectively with the middle section of shaped seals valve (4), direction cover
(2) upper end is connected, to provide upward screen resilience.
7. cartridge type back-pressure valve as described in claim 1, it is characterised in that: the middle section of shaped seals valve (4) is for sealing
Tapered portion (42)；The tapered portion (42) of tubular spool (4) and seal receptacle (5) pressing seal the truncation to realize valve body.
8. cartridge type back-pressure valve as described in claim 1, it is characterised in that: the upper section of shaped seals valve (4) is cylindrical part (43),
The side wall of cylindrical part (43) offers flowing hole two (44).
9. cartridge type back-pressure valve as described in claim 1, it is characterised in that: the upper end of tubular spool (4) offers multiple notches
(45), in order to rotating tubular spool.
10. seal receptacle as described in claim 1, it is characterised in that: the seal receptacle (5) includes gasket (51), valve seat
(52)；Wherein,
Valve seat (52) is fixed to be assemblied in valve body (1), and gasket (51) is pressed in below；
The pressing of the gasket (51) of tubular spool (4) and seal receptacle seals the truncation to realize valve body；Alternatively,
Valve seat (52) is fixed to be assemblied in valve body (1), and gasket (51) is assemblied in the annular groove that the inner wall of valve seat (52) opens up
It is interior；The pressing of the gasket (51) of tubular spool (4) and seal receptacle seals the truncation to realize valve body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019107448083 | 2019-08-13 | ||
| CN201910744808 | 2019-08-13 |
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| CN110439505B CN110439505B (en) | 2021-03-16 |
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ID=68437082
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910778018.7A Active CN110439505B (en) | 2019-08-13 | 2019-08-22 | Cylindrical back pressure valve |
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| Country | Link |
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| CN (1) | CN110439505B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109307A (en) * | 2021-12-01 | 2022-03-01 | 西南石油大学 | Erosion-resistant normally-open type internal blowout prevention valve |
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| CN202090892U (en) * | 2011-06-02 | 2011-12-28 | 广汉川油井控装备有限公司 | Cylindrical pressure return valve |
| CN207960573U (en) * | 2018-02-24 | 2018-10-12 | 广汉川油井控装备有限公司 | Cylindrical pressure return valve |
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2019
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| EP0118994A1 (en) * | 1983-02-14 | 1984-09-19 | Halliburton Company | Cementing tool for wells |
| CN2061206U (en) * | 1989-08-25 | 1990-08-29 | 四川省石油管理局川东钻探公司 | Self-injecting mud back-pressure valve |
| CN2163230Y (en) * | 1993-04-29 | 1994-04-27 | 四川石油管理局川东钻探公司 | Dual-function sword-like back-pressure valve |
| CN2711379Y (en) * | 2004-06-17 | 2005-07-20 | 四川石油管理局 | Intensive connecting back-pressure valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109307A (en) * | 2021-12-01 | 2022-03-01 | 西南石油大学 | Erosion-resistant normally-open type internal blowout prevention valve |
| CN114109307B (en) * | 2021-12-01 | 2022-07-22 | 西南石油大学 | Erosion-resistant normally-open type internal blowout prevention valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110439505B (en) | 2021-03-16 |
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