CN206376774U - A kind of grouting back pressure valve certainly - Google Patents
A kind of grouting back pressure valve certainly Download PDFInfo
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- CN206376774U CN206376774U CN201621377710.7U CN201621377710U CN206376774U CN 206376774 U CN206376774 U CN 206376774U CN 201621377710 U CN201621377710 U CN 201621377710U CN 206376774 U CN206376774 U CN 206376774U
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Abstract
The utility model discloses a kind of from grouting back pressure valve, belong to drilling equipment technical field, including valve body, valve element and the fulcrum bearing and valve seat that are arranged in valve body, fulcrum bearing is located at below valve seat, it is characterised in that：Piston is provided with the valve body, the piston bush is on valve element, the valve seat includes upper valve base and lower valve base, upper valve base is located between piston and valve body, mud backflow slotted eye is provided with the upper valve base, mud backflow slotted eye is connected with the inner chamber of valve body, and mud return port is provided with the valve body, and the mud return port is connected with mud backflow slotted eye.The utility model can pour into mud in well in drilling rod automatically, provisions for grouting is just connected without often putting down a part of drilling rod mud is poured into drilling rod, it is greatly reduced quantities, effectively reduce grouting cost, and can effectively prevent that inner chamber of the mud through valve body is regurgitated to drilling rod in well, ensure drilling safety.
Description
Technical field
The utility model is related to drilling equipment technical field, more particularly to a kind of from grouting back pressure valve.
Background technology
Back pressure valve is a kind of anti-interior device sprayed in drilling process, is a kind of ball-and-seat, back pressure valve can be effective
Prevent formation fluid by bit port enter drilling tool in.Existing back pressure valve mainly include valve body, fulcrum bearing, valve element and
Valve seat.Its structural principle is that have a taper movable valve plug in instrument hydrophthalmia, during installation its big end down, small end upward, when
Mud by hydrophthalmia from top to down when, flow resistance is smaller, can pass through；When mud, from bottom to top anti-channeling flows out of drill string
When, the thrust that its big end is subject to is larger, and promotes taper head to move up, until the valve element conical surface is pasted with the valve seat conical surface
Close, so as to reach the purpose of closure hydrophthalmia.Generally in kill-job, drilling makes up a joint prevents mud anti-with can be played in going down process
The effect of spray.
Publication No. CN 203547660U, publication date disclosed one kind for the Chinese patent literature of on 04 16th, 2014
Back pressure valve, it is characterised in that：Including valve body, Compounded rubber plug, eyelet；The valve body is cylinder, along its axis direction
It is provided with slurry channel；Annular projection is provided with described valve body one end, the Compounded rubber plug is placed in the annular projection, will
The slurry channel closure；Annular groove is provided with the inwall of the slurry channel, the eyelet is placed in the ring
In connected in star；On the Compounded rubber plug, towards the eyelet direction, connecting portion is provided with；The connecting portion is placed in described
In slurry channel, block is provided with its free end；When the Compounded rubber plug blocks the slurry channel, the block is worn
The eyelet is crossed, the eyelet can stop that the block is moved towards the direction of the annular projection.
Back pressure valve disclosed in the patent document, although good sealing and choked flow effect can be played, prevent from regurgitating, keep away
Exempt to cause engineering accident.But, using the patent document as the prior art of representative, in the presence of following defect：
1st, in lower brill, a part of drilling rod is often put down, it is necessary to connect provisions for grouting and mud is poured into drilling rod, filled
Afterwards, then provisions for grouting is removed, is put into next section drilling rod, so repeat could complete brill to act, quantities is very big, time-consuming to take
Power is, it is necessary to pour into substantial amounts of mud, and grouting cost is high.
2nd, spring is installed between the valve element and base of back pressure valve, spring is socketed on the valve rod of valve element, spring one end
It is connected on base, the other end is connected on the circular cone of valve element, because the diameter of valve rod is smaller, back pressure valve is being used for a long time
During, valve element moves up and down, spring also can ceaselessly return and compression, spring easily deforms by excessive compression,
Cause the circular cone of valve element can not fast and effectively parking position accuracy, it is impossible to valve seat conical surface good fit, and then not reach and block
The purpose of hydrophthalmia；And spring is in compression and reset, spring is swung, and is ceaselessly hit the valve rod of valve element, is caused valve rod to fracture,
Valve element is ineffective, causes mud to be regurgitated, and causes extremely serious consequence.
Utility model content
The utility model is in order to overcome the defect of above-mentioned prior art there is provided a kind of from grouting back pressure valve, and this practicality is newly
Type can pour into mud in well in drilling rod automatically, and just connect provisions for grouting without often putting down a part of drilling rod pours into drilling rod
Mud, is greatly reduced quantities, effectively reduction grouting cost, and can effectively prevent inner chamber of the mud through valve body in well
Regurgitate to drilling rod, ensure drilling safety.
The utility model is achieved through the following technical solutions：
It is a kind of from grouting back pressure valve, including valve body, valve element and the fulcrum bearing and valve seat that are arranged in valve body support seat
Below valve seat, it is characterised in that：Piston is provided with the valve body, the piston bush is on valve element, and the valve seat includes upper
Valve seat and lower valve base, upper valve base are located between piston and valve body, and mud backflow slotted eye, mud backflash are provided with the upper valve base
Hole is connected with the inner chamber of valve body, and mud return port is provided with the valve body, and the mud return port is connected with mud backflow slotted eye.
The valve element includes upper valve rod, circular cone and lower valve rod successively from top to bottom, and the upper end of upper valve rod is provided with fixation
The big end of the small end connection of nut, lower end and circular cone, lower valve rod one end and circular cone is connected, and the other end is stretched into fulcrum bearing.
Back-moving spring is cased with the lower valve rod, back-moving spring is contacted with fulcrum bearing.
The first O-ring seals are provided between the circular cone and lower valve base, the first O-ring seals are nested in circular cone
On big end.
Spring groove is provided with the big end of the circular cone, one end of back-moving spring is contacted with the bottom of spring groove, the other end
Contacted with fulcrum bearing.
Mounting groove is provided with the upper valve base, mounting groove is connected with mud return port and mud backflow slotted eye, installed respectively
Check valve is installed in groove.
The check valve includes limit spring and backflow steel ball, one end of limit spring and the top contact of mounting groove,
The other end is contacted with backflow steel ball, and backflow steel ball is stuck on the bottom of mounting groove.
It is provided with the piston in locating slot, locating slot and retaining spring and locking ball is installed, is at least opened on upper valve base
There are two groups of grooves being adapted with locking ball.
It is provided with the inwall of the valve body on step, step and is provided with pressure cap, pressure cap is located above piston, pressure cap and valve
Body is connected through a screw thread.
The second O-ring seals are provided between the lower valve base and valve body, the second O-ring seals are enclosed on lower valve base.
The 3rd O-ring seals are provided between the upper valve base and valve body, the 3rd O-ring seals are enclosed on upper valve base.
The 4th O-ring seals are provided between the piston and upper valve base, the 4th O-ring seals are enclosed on piston.
Opening is provided with the circular cone, opening is connected with spring groove.
The upper valve base and lower valve base, which are formed in one, to be formed, and lower valve base is adapted with circular cone.
Operation principle of the present utility model is as follows：
It is lower to bore：By drilling tool together with from grouting back pressure valve G.I.H, in well mud under the effect of the pressure, i.e. ring
In the case that pneumatics is higher than body cavity by force, mud is entered on upper valve base through the mud return port on valve body from outside to inside in well
Mud backflow slotted eye at, overcome limit spring elastic force act on by backflow steel ball upwards top open, mud backflash hole path
It is opened, mud flows back slotted eye into the inner chamber of valve body along mud in well, and mud is flowed back from bottom to top by the inner chamber of valve body
Into drilling rod；With continuous lower drilling tool, mud is constantly flowed back into drilling rod in well, until lower drilling tool is finished, liquid inside and outside drilling rod
Mud flows back no longer into drilling rod in pressure balance, well, completes being acted from grouting in drilling rod.Instantly drilling tool is finished, mud in well
Slurry flows back no longer into drilling rod, and the backflow steel ball in upper valve base moves down closing mud backflow under the elastic force effect of limit spring
Slotted eye passage, in case during postorder direct circulation mud, preventing mud from being let out through mud backflow slotted eye.
Direct circulation mud：Mud on ground in grouting equipment squeezes into drilling rod together with mud in the well in drilling rod by slush pump
Into in the valve body from grouting back pressure valve, mud promotion valve element overcomes the elastic force of back-moving spring, by the circular cone of valve element down
Promote, circular cone is departed from lower valve base, direct circulation slurry channel is opened；At the same time, valve element is driven by fixing nut and lived
Plug is moved down, and piston blocks mud backflow slotted eye, makes to close from grouting channel；Mud and drilling rod on ground in grouting equipment
Mud passes through from grouting back pressure valve and flows through whole drilling tool in interior well, is come out from bottom bit port, and is bored within well
Annular space beyond bar is flowed on ground, and sandstone that shaft bottom can be thus come outbreak out etc. are taken away.
Blowout and well kick：When occurring blowout or well kick, mud or gas enter valve through fulcrum bearing reflux from bottom to top in well
In vivo, can all produce thrust under mud or gas and back-moving spring self-acting to valve element in well, the circular cone of valve element to
On be pushed into lower valve base, direct circulation slurry channel is closed；In addition it is also what is closed from grouting channel, therefore, it is possible to effective
Prevent that mud is regurgitated in well.
The beneficial effects of the utility model are mainly manifested in following aspect：
First, piston is provided with the utility model, valve body, piston bush is on valve element, and valve seat includes upper valve base and lower valve base,
Upper valve base, which is located at, is provided with mud backflow slotted eye between piston and valve body, on upper valve base, the inner chamber of mud backflow slotted eye and valve body connects
It is logical, mud return port is provided with valve body, mud return port is connected with mud backflow slotted eye, by setting mud to flow back on valve body
Hole, mud backflow slotted eye is set on upper valve base, the inner chamber of mud return port, mud backflow slotted eye and valve body is formed one
The passage flowed back for mud in well, during lower brill, by by drilling tool together with from grouting back pressure valve G.I.H, mud in well
It can be just back under the effect of the pressure through mud return flow line in well in drilling rod, complete being acted from grouting in drilling rod；With
Prior art is compared, and just connecting provisions for grouting without often putting down a part of drilling rod pours into mud into drilling rod, is removed again after having filled
Provisions for grouting, is put into next section drilling rod, is greatly reduced quantities, time saving and energy saving, and effectively reduces grouting cost；
Due to reducing spring between valve element and fulcrum bearing so that during direct circulation mud, valve element need not overcome the resistance of spring just can
Promoted, open direct circulation slurry channel, direct circulation mud is more smooth, returned while piston blocks mud under valve element drive
Chute hole；When occurring blowout or during well kick, mud or gas are from bottom to top through in fulcrum bearing reflux inlet valve body in well, the mud in well
Valve element is pushed into valve seat in the presence of slurry or gas, and direct circulation slurry channel is closed；Mud backflow slotted eye is sealed by piston again
Block, therefore, it is possible to effectively prevent that inner chamber of the mud through valve body is regurgitated to drilling rod in well, ensure drilling safety.
2nd, the utility model, valve element includes upper valve rod, circular cone and lower valve rod, the upper end of upper valve rod successively from top to bottom
Fixing nut is provided with, the small end connection of lower end and circular cone, the big end connection of lower valve rod one end and circular cone, the other end is stretched into
In fulcrum bearing, it can be engaged by the big end toper face of circular cone with the inclined-plane of lower valve base, direct circulation slurry channel is blocked
Firmly；Moved down by the fixing nut band piston for being arranged on upper valve rod upper end, so as to block mud backflow slotted eye, work as hair
When raw blowout or well kick, mud in well can be prevented effectively from and regurgitated.
3rd, back-moving spring is cased with the utility model, lower valve rod, back-moving spring is contacted with fulcrum bearing, by setting up reset
Spring, when direct circulation mud, after mud washes the circular cone of valve element open, because back-moving spring is contacted with fulcrum bearing, resets bullet
The active force of spring a part of can offset the impulse force that mud is produced to circular cone, it is to avoid circular cone hits fulcrum bearing, can be effective
Circular cone is protected, and then ensures that the normal of valve element is used；When occurring blowout or well kick, the active force of back-moving spring can add again
The movement of fast circular cone, makes valve element and valve seat rapid closing, prevents mud from regurgitating.
4th, the utility model, is provided with the first O-ring seals between circular cone and lower valve base, the first O-ring seals are nested
On the big end of circular cone, after long-time use, gap is easily produced between circular cone and lower valve base, is sealed by the first O shapes
Circle can carry out good sealing, and then can effectively prevent that mud is regurgitated into direct circulation slurry channel into drilling rod in well,
It is further ensured that drilling safety.
5th, spring groove is provided with the utility model, the big end of circular cone, one end of back-moving spring and the bottom of spring groove connect
Touch, the other end is contacted with fulcrum bearing, during long-term use, valve element moves up and down, back-moving spring also can ceaselessly compress
And reset, by setting up spring groove, when direct circulation mud, a part for back-moving spring is contained in spring groove, when reset bullet
Spring compression to a certain extent when, the big end end face of circular cone is contacted with fulcrum bearing, can prevent back-moving spring be overly compressed and
Deformation, ensures the stability in use of back-moving spring, enables the progress of circular cone parking position accuracy and lower valve base is good to fit, prevents
Mud is regurgitated in well；Back-moving spring will not be overly compressed, it becomes possible to reduce swinging for back-moving spring, so as to reduce
Back-moving spring hits the probability of lower valve rod, extends the service life of whole valve element.
6th, be provided with mounting groove on the utility model, upper valve base, mounting groove respectively with mud return port and mud backflow slotted eye
Check valve is installed in connection, mounting groove, by the setting of check valve, mud enters from outside to inside in a permission well, it is impossible to from
It is interior to arrive external leakage；I.e. self-priming pulpous state state when, mud can enter through mud return port, check valve and mud backflow slotted eye successively in well
Enter the inner chamber of valve body, most the inner chamber through valve body enters drilling rod afterwards, complete being in the milk certainly in drilling rod, direct circulation slurry condition, when big
Amount mud is poured in valve body, and check valve can just prevent to enter mud backflow slotted eye by the gap between upper valve base and valve body
Interior mud, further passs through check valve and is let out from mud return port, so as to save grouting cost.
7th, the utility model, check valve includes limit spring and backflow steel ball, one end of limit spring and mounting groove
Top contact, the other end is contacted with backflow steel ball, and backflow steel ball is stuck on the bottom of mounting groove, using specific spacing bullet
Spring and backflow steel ball are as check valve, during self-priming pulpous state state, when mud enters mud backflow slotted eye through mud return port in well,
In well in the presence of mud, backflow steel ball is extruded limit spring by upward thrust, so that backflow steel ball is de-
From the bottom plate rabbet of mounting groove, mud return port is connected with mud backflow slotted eye, drilling rod is completed from grouting；And in direct circulation mud
Pulpous state state, backflow steel ball is in the presence of self gravitation and limit spring, it becomes possible to block the bottom plate rabbet of mounting groove, only
Backflow steel ball is curved surface, it is possible to increase plugging effect, and then prevents mud from leaking；In addition, using limit spring and backflow steel
Ball, maintenance cost low the characteristics of simple with installing.
8th, it is provided with the utility model, piston in locating slot, locating slot and retaining spring and locking ball is installed, upper valve
Two groups of grooves being adapted with locking ball are at least provided with seat, from grouting back pressure valve when unused, locking ball is determined
Position spring is squeezed in the groove of upper valve base, piston can be positioned, when direct circulation mud, mud enters to retaining spring
Row extruding, retaining spring compression, locking ball departs from groove, drives lower piston just can be to moving down in the fixing bolt of valve element
It is dynamic, and then direct circulation slurry channel is opened, when piston is moved to next group of groove, locking ball is just in the effect of retaining spring
Under be embedded into groove, prevent piston further move down, reduce piston shift motion, it is to avoid the big end end face of circular cone is hit
Hit fulcrum bearing, can not only extend the service life of whole valve element, and can prevent circular cone because hit it is impaired can not be with
Lower valve base carries out good laminating, so as to further prevent that mud is regurgitated in well.
9th, it is provided with the utility model, the inwall of valve body on step, step and is provided with pressure cap, pressure cap is located on piston
Side, pressure cap is connected through a screw thread with valve body, spacing by setting pressure cap to be carried out to piston and upper valve base, is prevented from grouting
During state, piston and upper valve base are washed from valve body by mud in well, can ensure the whole stability in use from the back pressure valve that is in the milk.
Tenth, the utility model, is provided with the second O-ring seals between lower valve base and valve body, the second O-ring seals are enclosed on down
On valve seat, by increasing capacitance it is possible to increase the sealing between lower valve base and valve body, in blowout or well kick, prevent in well mud through lower valve base with
Gap backflow between valve body, can strengthen mud counter-jetting resistance effect in well.
11, the utility model, is provided with the 3rd O-ring seals between upper valve base and valve body, the 3rd O-ring seals are enclosed on
On upper valve base, by increasing capacitance it is possible to increase the sealing between upper valve base and valve body, in blowout or well kick, further prevent that mud is worn in well
The gap crossed between lower valve base and valve body is flowed back through the gap between upper valve base and valve body, improves counter-jetting resistance effect.
12, the utility model, is provided with the 4th O-ring seals between piston and upper valve base, the 4th O-ring seals are enclosed on
On piston, by increasing capacitance it is possible to increase the sealing between piston and upper valve base, when preventing direct circulation mud, mud through piston and upper valve base it
Between gap be flowed into mud backflow slotted eye in, effectively can prevent mud from leaking.
13, opening is provided with the utility model, circular cone, opening is connected with spring groove, is easy to direct circulation mud
When liquid flowing, ensure direct circulation mud smoothness.
14, the utility model, upper valve base and lower valve base are formed in one and formed, and structural strength is high, can extend upper valve
The service life of seat and lower valve base, reduces replacement cost；Lower valve base is adapted with circular cone, can be played in blowout or well kick
Good plugging effect, prevents that mud is regurgitated in well.
Brief description of the drawings
The utility model is described in further detail below in conjunction with specification drawings and specific embodiments, its
In：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of the utility model embodiment 2；
Fig. 3 is the structural representation of the utility model embodiment 3；
Fig. 4 is the structural representation of the utility model embodiment 4；
Structural representation Fig. 5 is is in the milk certainly in the utility model embodiment 5 when；
Fig. 6 is the structural representation in the utility model embodiment 5 during direct circulation mud；
Structural representation when Fig. 7 is blowout in the utility model embodiment 5 or well kick；
Marked in figure：1st, valve body, 2, valve element, 3, fulcrum bearing, 4, valve seat, 5, piston, 6, upper valve base, 7, lower valve base, 8, mud
Slurry backflow slotted eye, 9, mud return port, 10, upper valve rod, 11, circular cone, 12, lower valve rod, 13, fixing nut, 14, reset bullet
Spring, the 15, first O-ring seals, 16, spring groove, 17, mounting groove, 18, check valve, 19, limit spring, 20, backflow steel ball,
21st, locating slot, 22, retaining spring, 23, locking ball, 24, groove, 25, step, 26, pressure cap, the 27, second O-ring seals,
28th, the 3rd O-ring seals, the 29, the 4th O-ring seals, 30, opening.
Embodiment
Embodiment 1
It is a kind of from grouting back pressure valve referring to Fig. 1, including valve body 1, valve element 2 and the and of fulcrum bearing 3 that is arranged in valve body 1
Valve seat 4, fulcrum bearing 3, which is located in the lower section of valve seat 4, the valve body 1, is provided with piston 5, and the piston 5 is enclosed on valve element 2, the valve
Seat 4 includes upper valve base 6 and lower valve base 7, and upper valve base 6 is located between piston 5 and valve body 1, and mud backflow is provided with the upper valve base 6
Slotted eye 8, mud backflow slotted eye 8 is connected with the inner chamber of valve body 1, and mud return port 9, the mud backflow are provided with the valve body 1
Hole 9 is connected with mud backflow slotted eye 8.
The present embodiment is to be provided with piston in most basic embodiment, valve body, and piston bush is on valve element, and valve seat includes upper
Valve seat and lower valve base, upper valve base be located at is provided between piston and valve body, on upper valve base mud backflow slotted eye, mud backflow slotted eye with
Mud return port is provided with the inner chamber connection of valve body, valve body, mud return port is connected with mud backflow slotted eye, by valve body
Mud return port is set, mud backflow slotted eye is set on upper valve base, makes mud return port, mud backflow slotted eye and valve body
Inner chamber forms a passage for mud backflow in well, during lower brill, by by drilling tool together with from grouting back pressure valve tripping in
In well, mud can be just back in drilling rod through mud return flow line in well under the effect of the pressure in well, completed in drilling rod
From grouting action；Compared with prior art, just connecting provisions for grouting without often putting down a part of drilling rod pours into mud into drilling rod,
Provisions for grouting is removed after having filled again, next section drilling rod is put into, is greatly reduced quantities, it is time saving and energy saving, and effectively reduce
Grouting cost；Due to reducing spring between valve element and fulcrum bearing so that during direct circulation mud, valve element need not overcome spring
Resistance can just be promoted, direct circulation slurry channel is opened, direct circulation mud is more smooth, while piston is under valve element drive
Block mud backflow slotted eye；When occurring blowout or well kick, mud or gas enter valve through fulcrum bearing reflux from bottom to top in well
In vivo, valve element is pushed into valve seat in the presence of mud or gas in well, and direct circulation slurry channel is closed；Mud backflash
What hole was blocked by piston again, therefore, it is possible to effectively prevent that inner chamber of the mud through valve body is regurgitated to drilling rod in well, ensure drilling well
Safety.
Embodiment 2
It is a kind of from grouting back pressure valve referring to Fig. 2, including valve body 1, valve element 2 and the and of fulcrum bearing 3 that is arranged in valve body 1
Valve seat 4, fulcrum bearing 3, which is located in the lower section of valve seat 4, the valve body 1, is provided with piston 5, and the piston 5 is enclosed on valve element 2, the valve
Seat 4 includes upper valve base 6 and lower valve base 7, and upper valve base 6 is located between piston 5 and valve body 1, and mud backflow is provided with the upper valve base 6
Slotted eye 8, mud backflow slotted eye 8 is connected with the inner chamber of valve body 1, and mud return port 9, the mud backflow are provided with the valve body 1
Hole 9 is connected with mud backflow slotted eye 8.
The valve element 2 includes upper valve rod 10, circular cone 11 and lower valve rod 12 successively from top to bottom, and the upper end of upper valve rod 10 is set
Fixing nut 13 is equipped with, lower end is connected with the small end of circular cone 11, the one end of lower valve rod 12 is connected with the big end of circular cone 11, another
End is stretched into fulcrum bearing 3.
Back-moving spring 14 is cased with the lower valve rod 12, back-moving spring 14 is contacted with fulcrum bearing 3.
The first O-ring seals 15 are provided between the circular cone 11 and lower valve base 7, the first O-ring seals 15 are nested in
On the big end of circular cone 11.
The present embodiment is a better embodiment, and valve element includes upper valve rod, circular cone and lower valve rod successively from top to bottom, on
The upper end of valve rod is provided with fixing nut, and the small end of lower end and circular cone is connected, and the big end of lower valve rod one end and circular cone is connected,
The other end is stretched into fulcrum bearing, can be engaged by the big end toper face of circular cone with the inclined-plane of lower valve base, by direct circulation mud
Slurry passage plugging is lived；Moved down, returned so as to block mud by the fixing nut band piston for being arranged on upper valve rod upper end
Chute hole, when occurring blowout or well kick, can be prevented effectively from mud in well and regurgitate.Back-moving spring is cased with lower valve rod, is resetted
Spring is contacted with fulcrum bearing, by setting up back-moving spring, when direct circulation mud, after mud washes the circular cone of valve element open, by
Contacted in back-moving spring with fulcrum bearing, the active force of back-moving spring a part of can offset the impulse force that mud is produced to circular cone,
Avoid circular cone from hitting fulcrum bearing, can effectively protect circular cone, and then ensure that the normal of valve element is used；When generation blowout or well
When gushing, the active force of back-moving spring can accelerate the movement of circular cone again, make valve element and valve seat rapid closing, prevent mud anti-
Spray.The first O-ring seals are provided between circular cone and lower valve base, the first O-ring seals are nested on the big end of circular cone, it is long
After time use, gap is easily produced between circular cone and lower valve base, can be carried out by the first O-ring seals good close
Envelope, and then can effectively prevent that mud is regurgitated into direct circulation slurry channel into drilling rod in well, is further ensured that drilling safety.
Embodiment 3
It is a kind of from grouting back pressure valve referring to Fig. 3, including valve body 1, valve element 2 and the and of fulcrum bearing 3 that is arranged in valve body 1
Valve seat 4, fulcrum bearing 3, which is located in the lower section of valve seat 4, the valve body 1, is provided with piston 5, and the piston 5 is enclosed on valve element 2, the valve
Seat 4 includes upper valve base 6 and lower valve base 7, and upper valve base 6 is located between piston 5 and valve body 1, and mud backflow is provided with the upper valve base 6
Slotted eye 8, mud backflow slotted eye 8 is connected with the inner chamber of valve body 1, and mud return port 9, the mud backflow are provided with the valve body 1
Hole 9 is connected with mud backflow slotted eye 8.
The valve element 2 includes upper valve rod 10, circular cone 11 and lower valve rod 12 successively from top to bottom, and the upper end of upper valve rod 10 is set
Fixing nut 13 is equipped with, lower end is connected with the small end of circular cone 11, the one end of lower valve rod 12 is connected with the big end of circular cone 11, another
End is stretched into fulcrum bearing 3.
Back-moving spring 14 is cased with the lower valve rod 12, back-moving spring 14 is contacted with fulcrum bearing 3.
The first O-ring seals 15 are provided between the circular cone 11 and lower valve base 7, the first O-ring seals 15 are nested in
On the big end of circular cone 11.
Spring groove 16 is provided with the big end of the circular cone 11, one end and the bottom of spring groove 16 of back-moving spring 14 connect
Touch, the other end is contacted with fulcrum bearing 3.
The present embodiment is another better embodiment, is provided with spring groove on the big end of circular cone, one end of back-moving spring with
The bottom contact of spring groove, the other end is contacted with fulcrum bearing, during long-term use, and valve element moves up and down, back-moving spring
Also ceaselessly it can compress and reset, by setting up spring groove, when direct circulation mud, a part for back-moving spring is contained in spring
In groove, when back-moving spring compresses to a certain extent, the big end end face of circular cone is contacted with fulcrum bearing, can prevent back-moving spring
It is overly compressed and deforms, ensure the stability in use of back-moving spring, circular cone parking position accuracy is carried out with lower valve base good
Good laminating, prevents that mud is regurgitated in well；Back-moving spring will not be overly compressed, it becomes possible to reduce the left and right pendulum of back-moving spring
It is dynamic, so as to reduce the probability that back-moving spring hits lower valve rod, extend the service life of whole valve element.
Embodiment 4
It is a kind of from grouting back pressure valve referring to Fig. 4, including valve body 1, valve element 2 and the and of fulcrum bearing 3 that is arranged in valve body 1
Valve seat 4, fulcrum bearing 3, which is located in the lower section of valve seat 4, the valve body 1, is provided with piston 5, and the piston 5 is enclosed on valve element 2, the valve
Seat 4 includes upper valve base 6 and lower valve base 7, and upper valve base 6 is located between piston 5 and valve body 1, and mud backflow is provided with the upper valve base 6
Slotted eye 8, mud backflow slotted eye 8 is connected with the inner chamber of valve body 1, and mud return port 9, the mud backflow are provided with the valve body 1
Hole 9 is connected with mud backflow slotted eye 8.
The valve element 2 includes upper valve rod 10, circular cone 11 and lower valve rod 12 successively from top to bottom, and the upper end of upper valve rod 10 is set
Fixing nut 13 is equipped with, lower end is connected with the small end of circular cone 11, the one end of lower valve rod 12 is connected with the big end of circular cone 11, another
End is stretched into fulcrum bearing 3.
Back-moving spring 14 is cased with the lower valve rod 12, back-moving spring 14 is contacted with fulcrum bearing 3.
The first O-ring seals 15 are provided between the circular cone 11 and lower valve base 7, the first O-ring seals 15 are nested in
On the big end of circular cone 11.
Spring groove 16 is provided with the big end of the circular cone 11, one end and the bottom of spring groove 16 of back-moving spring 14 connect
Touch, the other end is contacted with fulcrum bearing 3.
Mounting groove 17 is provided with the upper valve base 6, mounting groove 17 connects with mud return port 9 and mud backflow slotted eye 8 respectively
It is logical, check valve 18 is installed in mounting groove 17.
The check valve 18 includes limit spring 19 and backflow steel ball 20, one end and the mounting groove 17 of limit spring 19
Top contact, the other end is contacted with backflow steel ball 20, and backflow steel ball 20 is stuck on the bottom of mounting groove 17.
The present embodiment is another better embodiment, is provided with mounting groove on upper valve base, mounting groove respectively with mud return port
With mud backflow slotted eye connect, check valve is installed in mounting groove, by the setting of check valve, in a permission well mud from outside to
It is interior to enter, it is impossible to leak from inside to outside；I.e. self-priming pulpous state state when, in well mud can successively through mud return port, check valve and
Mud backflow slotted eye enters the inner chamber of valve body, and most the inner chamber through valve body enters drilling rod afterwards, completes being in the milk certainly in drilling rod, direct circulation
Slurry condition, when a large amount of mud are poured in valve body, check valve can just prevent to enter by the gap between upper valve base and valve body
To the mud in mud backflow slotted eye, further pass through check valve and let out from mud return port, so as to save grouting
Cost.Check valve includes limit spring and backflow steel ball, one end of limit spring and the top contact of mounting groove, the other end with
Backflow steel ball is contacted, and backflow steel ball is stuck on the bottom of mounting groove, is made using specific limit spring and backflow steel ball
For check valve, during self-priming pulpous state state, in well mud through mud return port enter mud flow back slotted eye when, the effect of mud in well
Under, backflow steel ball is extruded limit spring by upward thrust, so that backflow steel ball departs from the base channel of mounting groove
Mouthful, mud return port is connected with mud backflow slotted eye, drilling rod is completed from grouting；And in direct circulation slurry condition, backflow steel
Ball is in the presence of self gravitation and limit spring, it becomes possible to block the bottom plate rabbet of mounting groove, and backflow steel ball is curved surface,
Plugging effect can be improved, and then prevents mud from leaking；In addition, using limit spring and backflow steel ball, it is simple with installing,
The characteristics of maintenance cost is low.
Embodiment 5
It is a kind of from grouting back pressure valve, including valve body 1, valve element 2 and the fulcrum bearing being arranged in valve body 1 referring to Fig. 5-Fig. 7
3 and valve seat 4, fulcrum bearing 3, which is located in the lower section of valve seat 4, the valve body 1, is provided with piston 5, and the piston 5 is enclosed on valve element 2, institute
Stating valve seat 4 includes upper valve base 6 and lower valve base 7, and upper valve base 6 is located between piston 5 and valve body 1, and mud is provided with the upper valve base 6
Flowed back slotted eye 8, and mud backflow slotted eye 8 is connected with the inner chamber of valve body 1, and mud return port 9, the mud are provided with the valve body 1
Return port 9 is connected with mud backflow slotted eye 8.
The valve element 2 includes upper valve rod 10, circular cone 11 and lower valve rod 12 successively from top to bottom, and the upper end of upper valve rod 10 is set
Fixing nut 13 is equipped with, lower end is connected with the small end of circular cone 11, the one end of lower valve rod 12 is connected with the big end of circular cone 11, another
End is stretched into fulcrum bearing 3.
Back-moving spring 14 is cased with the lower valve rod 12, back-moving spring 14 is contacted with fulcrum bearing 3.
The first O-ring seals 15 are provided between the circular cone 11 and lower valve base 7, the first O-ring seals 15 are nested in
On the big end of circular cone 11.
Spring groove 16 is provided with the big end of the circular cone 11, one end and the bottom of spring groove 16 of back-moving spring 14 connect
Touch, the other end is contacted with fulcrum bearing 3.
Mounting groove 17 is provided with the upper valve base 6, mounting groove 17 connects with mud return port 9 and mud backflow slotted eye 8 respectively
It is logical, check valve 18 is installed in mounting groove 17.
The check valve 18 includes limit spring 19 and backflow steel ball 20, one end and the mounting groove 17 of limit spring 19
Top contact, the other end is contacted with backflow steel ball 20, and backflow steel ball 20 is stuck on the bottom of mounting groove 17.
It is provided with the piston 5 in locating slot 21, locating slot 21 and retaining spring 22 and locking ball 23, upper valve base is installed
Two groups of grooves 24 being adapted with locking ball 23 are at least provided with 6.
It is provided with the inwall of the valve body 1 on step 25, step 25 and is provided with pressure cap 26, pressure cap 26 is located on piston 5
Side, pressure cap 26 is connected through a screw thread with valve body 1.
The second O-ring seals 27 are provided between the lower valve base 7 and valve body 1, the second O-ring seals 27 are enclosed on lower valve base
On 7.
The 3rd O-ring seals 28 are provided between the upper valve base 6 and valve body 1, the 3rd O-ring seals 28 are enclosed on upper valve base
On 6.
The 4th O-ring seals 29 are provided between the piston 5 and upper valve base 6, the 4th O-ring seals 29 are enclosed on piston 5
On.
Opening 30 is provided with the circular cone 11, opening 30 is connected with spring groove 16.
The upper valve base 6 and lower valve base 7 are formed in one and formed, and lower valve base 7 is adapted with circular cone 11.
The present embodiment is to be provided with locating slot, locating slot to be provided with retaining spring and positioning on preferred forms, piston
Two groups of grooves being adapted with locking ball are at least provided with steel ball, upper valve base, from grouting back pressure valve when unused, are positioned
Steel ball is positioned spring and is squeezed in the groove of upper valve base, and piston can be positioned, when direct circulation mud, and mud is to fixed
Position spring is extruded, and retaining spring compression, locking ball departs from groove, drives lower piston just can in the fixing bolt of valve element
Move down, and then open direct circulation slurry channel, when piston is moved to next group of groove, locking ball is just in retaining spring
In the presence of be embedded into groove, prevent piston further move down, reduce piston shift motion, it is to avoid the big end of circular cone
End face hits fulcrum bearing, can not only extend the service life of whole valve element, and can prevent circular cone because hit it is impaired and
Can not with lower valve base carry out it is good fit, so as to further prevent that mud is regurgitated in well.It is provided with the inwall of valve body
Pressure cap is provided with step, step, pressure cap is located above piston, and pressure cap is connected through a screw thread with valve body, by setting pressure cap energy
Enough spacing to piston and upper valve base progress, when preventing self-priming pulpous state state, piston and upper valve base are washed from valve body, energy by mud in well
It is enough to ensure the whole stability in use from the back pressure valve that is in the milk.The second O-ring seals, second are provided between lower valve base and valve body
O-ring seals are enclosed on lower valve base, by increasing capacitance it is possible to increase the sealing between lower valve base and valve body, in blowout or well kick, prevent well
Interior mud flows back through the gap between lower valve base and valve body, can strengthen mud counter-jetting resistance effect in well.Upper valve base and valve body it
Between be provided with the 3rd O-ring seals, the 3rd O-ring seals are enclosed on upper valve base, by increasing capacitance it is possible to increase close between upper valve base and valve body
Feng Xing, in blowout or well kick, further prevents that gap of the mud through lower valve base and valve body is through upper valve base and valve in well
Gap backflow between body, improves counter-jetting resistance effect.The 4th O-ring seals are provided between piston and upper valve base, the 4th O shapes are close
Seal is enclosed on piston, by increasing capacitance it is possible to increase the sealing between piston and upper valve base, when preventing direct circulation mud, mud through piston with
Gap between upper valve base is flowed into mud backflow slotted eye, effectively can prevent mud from leaking.Opening is provided with circular cone,
Opening is connected with spring groove, the flowing of liquid when being easy to direct circulation mud, ensures the smoothness of direct circulation mud.Upper valve base and
Lower valve base, which is formed in one, to be formed, and structural strength is high, can extend the service life of upper valve base and lower valve base, reduction is replaced with
This；Lower valve base is adapted with circular cone, and good plugging effect can be played in blowout or well kick, prevents that mud is anti-in well
Spray.
Claims (8)
1. it is a kind of from grouting back pressure valve, including valve body（1）, valve element（2）And it is arranged on valve body（1）Interior fulcrum bearing（3）And valve
Seat（4）, fulcrum bearing（3）Positioned at valve seat（4）Lower section, it is characterised in that：The valve body（1）Inside it is provided with piston（5）, the piston
（5）It is enclosed on valve element（2）On, the valve seat（4）Including upper valve base（6）And lower valve base（7）, upper valve base（6）Positioned at piston（5）And valve
Body（1）Between, the upper valve base（6）On be provided with mud backflow slotted eye（8）, mud backflow slotted eye（8）With valve body（1）Inner chamber connect
It is logical, the valve body（1）On be provided with mud return port（9）, the mud return port（9）With mud backflow slotted eye（8）Connection.
2. it is according to claim 1 a kind of from grouting back pressure valve, it is characterised in that：The valve element（2）From top to bottom according to
It is secondary including upper valve rod（10）, circular cone（11）And lower valve rod（12）, upper valve rod（10）Upper end be provided with fixing nut（13）, under
End and circular cone（11）Small end connection, lower valve rod（12）One end and circular cone（11）The connection of big end, the other end stretches into supporting
Seat（3）It is interior.
3. it is according to claim 2 a kind of from grouting back pressure valve, it is characterised in that：The lower valve rod（12）On be cased with it is multiple
Position spring（14）, back-moving spring（14）With fulcrum bearing（3）Contact.
4. it is according to claim 2 a kind of from grouting back pressure valve, it is characterised in that：The circular cone（11）With lower valve base
（7）Between be provided with the first O-ring seals（15）, the first O-ring seals（15）It is nested in circular cone（11）Big end on.
5. it is according to claim 3 a kind of from grouting back pressure valve, it is characterised in that：The circular cone（11）Big end on
It is provided with spring groove（16）, back-moving spring（14）One end and spring groove（16）Bottom contact, the other end and fulcrum bearing（3）Connect
Touch.
6. it is according to claim 1 a kind of from grouting back pressure valve, it is characterised in that：The upper valve base（6）On be provided with peace
Tankage（17）, mounting groove（17）Respectively with mud return port（9）With mud backflow slotted eye（8）Connection, mounting groove（17）It is interior to install
There is check valve（18）.
7. it is according to claim 6 a kind of from grouting back pressure valve, it is characterised in that：The check valve（18）Including spacing
Spring（19）With backflow steel ball（20）, limit spring（19）One end and mounting groove（17）Top contact, the other end with only
Flow back steel ball（20）Contact, backflow steel ball（20）It is stuck in mounting groove（17）Bottom on.
8. it is according to claim 1 a kind of from grouting back pressure valve, it is characterised in that：The piston（5）On be provided with positioning
Groove（21）, locating slot（21）Retaining spring is inside installed（22）And locking ball（23）, upper valve base（6）On be at least provided with two groups with
Locking ball（23）The groove being adapted（24）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621377710.7U CN206376774U (en) | 2016-12-15 | 2016-12-15 | A kind of grouting back pressure valve certainly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621377710.7U CN206376774U (en) | 2016-12-15 | 2016-12-15 | A kind of grouting back pressure valve certainly |
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| Publication Number | Publication Date |
|---|---|
| CN206376774U true CN206376774U (en) | 2017-08-04 |
Family
ID=59406156
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621377710.7U Expired - Fee Related CN206376774U (en) | 2016-12-15 | 2016-12-15 | A kind of grouting back pressure valve certainly |
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| CN (1) | CN206376774U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401514A (en) * | 2016-12-15 | 2017-02-15 | 成都市卓新实业有限公司 | Backpressure valve capable of achieving automatic slurry injecting |
-
2016
- 2016-12-15 CN CN201621377710.7U patent/CN206376774U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401514A (en) * | 2016-12-15 | 2017-02-15 | 成都市卓新实业有限公司 | Backpressure valve capable of achieving automatic slurry injecting |
| CN106401514B (en) * | 2016-12-15 | 2019-05-21 | 成都市卓新实业有限公司 | A kind of grouting back pressure valve certainly |
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