CN104929574B - Dual-channel different-direction joint-control check valve - Google Patents
Dual-channel different-direction joint-control check valve Download PDFInfo
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- CN104929574B CN104929574B CN201510152589.1A CN201510152589A CN104929574B CN 104929574 B CN104929574 B CN 104929574B CN 201510152589 A CN201510152589 A CN 201510152589A CN 104929574 B CN104929574 B CN 104929574B
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Abstract
The invention discloses a dual-channel different-direction joint-control check valve which comprises a left valve body, a right valve body, an inner piston, an outer piston, an inner reset spring and an outer reset spring. A gap with the preset size is reserved between the hole wall of a first right through hole and the hole wall of a first left through hole, a plurality of inner grooves are evenly circumferentially arranged in the outer wall of the inner piston and correspond to the gap, a plurality of outer grooves are arranged in the inner wall of the outer piston in a manner of being in one-to-one correspondence to the inner grooves, the bottom of each outer groove is provided with one pin shaft reset spring, one pin shaft is jacked into the inner groove through the pin shaft reset spring, the hole wall of the first right through hole is provided with blind holes corresponding to the pins shafts, each blind hole is provided with one slider and a slider reset spring which press the slider onto the pin shaft, and the inner piston drives the outer piston to move synchronously through the pin shafts when moving rightwards under the pressure of the left side. By the arrangement, blowout accident can be effectively prevented when accident happens.
Description
Technical field
The present invention relates to oil drilling equipment field, in particular to a kind of incorgruous joint control ball-and-seat of binary channels.
Background technology
When double layer continuous oil pipe band instrument carries out operation, it will run into the double layer continuous oil pipe caused because of sudden accident
The problems such as body is damaged and ruptures, now OIH air water will gush from post-rift double layer continuous oil pipe internal and external channel
And cause gas blowout accident.Accordingly, it would be desirable to a kind of incorgruous joint control ball-and-seat of binary channels.
The content of the invention
The technical problem to be solved is, there is provided one kind can be effectively sealing off when fortuitous event occurs
The passage of inside and outside two-layer coiled tubing, so as to prevent well liquid from returning out, prevents the incorgruous joint control single current of binary channels of gas blowout accident
Valve.
Therefore, technical scheme is as follows：
The incorgruous joint control ball-and-seat of a kind of binary channels, it is characterised in that live including left valve barrel, right valve barrel, internal layer piston, outer layer
Plug, internal layer back-moving spring, outer layer back-moving spring, wherein：
The left valve barrel center is provided with the first left through hole, around the described first left through hole, the first left through hole and institute
Multiple the second left through holes being uniformly distributed circumferentially are additionally provided between the outer wall for stating left valve barrel, in the left end of the described first left through hole
The internal thread for connecting inside and outside two-layer coiled tubing body is machined with respectively with the left end of the left valve barrel, and described first is left logical
The right-hand member inner wall depression in hole forms the first left ring-shaped step coordinated with the internal layer piston, the first left through hole and the left side
The the second left ring-shaped step coordinated with the outer layer piston is also formed between the outer wall of valve body；
The right valve barrel center is provided with the first right through hole, around the described first right through hole, the first right through hole and institute
Multiple the second right through holes being uniformly distributed circumferentially are additionally provided between the outer wall for stating right valve barrel, in the right-hand member of the described first right through hole
The internal thread for connecting inside and outside two-layer coiled tubing body is machined with respectively with the right-hand member of the right valve barrel, and described first is right logical
The left end inner wall depression in hole forms the first right ring-shaped step coordinated with the internal layer back-moving spring, the first right through hole and institute
State the second right ring-shaped step that the left end between the outer wall of right valve barrel is also formed with coordinating with the outer layer back-moving spring；
The left valve barrel and the right valve barrel are external diameter identical cylinder, and the right-hand member of the left valve barrel and the right valve
The left end of body is threaded connection, and the first left through hole is coaxial with the described first right through hole, the second left through hole with it is described
Second right through hole is corresponded；
It is multiple by the internal layer that the left end of the internal layer piston is pressed in formation sealing, right-hand member on the described first left ring-shaped step
Position spring is pressed on the described first right ring-shaped step, and inwall, institute of the outer wall of the internal layer piston with the described first left through hole
The inwall for stating the first right through hole cooperatively forms sealing, outer wall and described first of the outer layer piston bush in the described first left through hole
On the outer wall of right through hole, the left end of the outer layer piston is pressed on the described second left ring-shaped step and forms sealing, right-hand member by institute
State outer layer back-moving spring to be pressed on the described second right ring-shaped step, and the inwall of the outer layer piston and the described first left through hole
Outer wall, the outer wall of the first right through hole cooperatively form sealing；
The space of default size, institute are left between the hole wall of the described first right through hole and the hole wall of the first left through hole
To state on the outer wall of internal layer piston and be accordingly circumferentially evenly arranged with multiple inner groovies, the inwall of the outer layer piston with the space
On be provided with multiple external grooves correspondingly with the inner groovy, the bottom of each external groove is equipped with bearing pin reset
Spring, the bearing pin back-moving spring heads into a bearing pin in the inner groovy by the space, the hole of the first right through hole
A blind hole is correspondingly provided with bearing pin each described in wall, a slide block and slide block back-moving spring is equipped with each described blind hole,
The slide block back-moving spring is pressed in the slide block on the bearing pin, leads to when the internal layer piston is moved right under left pressure
Cross the bearing pin and drive the outer layer piston synchronous motion；
The internal layer piston centrally along being axially arranged with opening piston blind hole to the right, and the left end of the internal layer piston
Be uniformly distributed circumferentially multiple interior connectivity slots, for when the internal layer piston is moved right by the piston blind hole with it is described
First left through hole connection；
An outer connectivity slot is correspondingly provided with each described second left through hole on the outer wall of the outer layer piston, in institute
State and connect the described second right through hole with the described second left through hole when outer layer piston is moved right.
The incorgruous joint control ball-and-seat of binary channels in the technical scheme is connected and incorgruous with binary channels with double layer continuous oil pipe
Synchronous joint control single current function, by the instrument various instruments matching used with double layer continuous oil pipe can be connected, and reach construction mesh
, compact conformation, the Opening pressure of valve and closing presure are low, and valve can bear high pressure, the safe and reliable point of construction operation after closing.
Be installed with respectively on the described first left ring-shaped step and the second left ring-shaped step internal layer piston seat and
Outer layer piston seat, the outer layer piston is pressed on the outer layer piston seat and forms sealing, and the internal layer piston is pressed in the internal layer
Sealing is formed on piston seat.
The inwall of the internal layer piston seat and the left side of the internal layer piston are the conical surface for cooperating, and the outer layer is lived
The left side of the inwall of obturating plug and the outer layer piston is the conical surface for cooperating, and is sealed more reliable.
The bearing pin is straight pin, and the left side of the slide block is the cambered surface coordinated with the bearing pin, relatively reliable.
Description of the drawings
Fig. 1 is the B-B sectional views under the incorgruous joint control single current valve closed mode of binary channels according to embodiments of the present invention；
Fig. 2 is A-A sectional views of the incorgruous joint control ball-and-seat of binary channels in Fig. 1；
Fig. 3 is the left view of left valve barrel in the incorgruous joint control ball-and-seat of binary channels in Fig. 1；
Fig. 4 is the C-C sectional views of left valve barrel in Fig. 3；
Fig. 5 is the right view of the right valve barrel of the incorgruous joint control ball-and-seat of binary channels in Fig. 1；
Fig. 6 is the D-D sectional views of right valve barrel in Fig. 5；
In Fig. 7 Fig. 1 in the incorgruous joint control ball-and-seat of binary channels internal layer piston independent structure schematic diagram；
Fig. 8 is the E-E sectional views of internal layer piston in Fig. 7；
Fig. 9 is the F-F sectional views of internal layer piston in Fig. 7；
Figure 10 is the independent structure schematic diagram of outer layer piston in the incorgruous joint control ball-and-seat of binary channels in Fig. 1；
Figure 11 is the H-H sectional views of outer layer piston in Figure 10；
Figure 12 is the independent structure schematic diagram of slide block in the incorgruous joint control ball-and-seat of binary channels in Fig. 1；
Figure 13 is the schematic diagram in Fig. 1 under the incorgruous joint control ball-and-seat open mode of binary channels.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.It should be noted that not
In the case of conflict, the feature in embodiments herein and embodiment can be mutually combined.
As shown in figure 1 to figure 13, the incorgruous joint control ball-and-seat of binary channels according to an embodiment of the invention, it is characterised in that
Including left valve barrel 2, right valve barrel 14, internal layer piston 24, outer layer piston 6, internal layer back-moving spring 26, outer layer back-moving spring 13, wherein：
The center of the left valve barrel 2 is provided with the first left through hole 41, around the described first left through hole 41, the first left through hole
Multiple the second left through holes 42 being uniformly distributed circumferentially are additionally provided between 41 and the outer wall of the left valve barrel 2, it is left described first
The left end of the left end of through hole 41 and the left valve barrel 2 is machined with respectively the interior spiral shell for connecting inside and outside two-layer coiled tubing body
Line, the right-hand member inner wall depression of the first left through hole 41 forms the first left ring-shaped step 51 coordinated with the internal layer piston 24,
The the second left ring coordinated with the outer layer piston 6 is also formed between the first left through hole 41 and the outer wall of the left valve barrel 2
Shape step 52；
The center of the right valve barrel 14 is provided with the first right through hole 61, around the described first right through hole 61, described first right logical
Multiple the second right through holes 62 being uniformly distributed circumferentially are additionally provided between the outer wall of hole 61 and the right valve barrel 14, described first
The right-hand member of the right-hand member of right through hole 61 and the right valve barrel 14 is machined with respectively for connecting in inside and outside two-layer coiled tubing body
Screw thread, the left end inner wall depression of the first right through hole 61 forms the first right annular table coordinated with the internal layer back-moving spring 26
Rank 71, the left end between the first right through hole 61 and the outer wall of the right valve barrel 14 is also formed with and the outer layer back-moving spring
13 the second right ring-shaped steps 72 for coordinating；
The left valve barrel 2 and the right valve barrel 14 are external diameter identical cylinder, and the right-hand member of the left valve barrel 2 with it is described
The left end of right valve barrel 14 is threaded connection, and the first left through hole 41 is coaxial with the described first right through hole 61, and described second is left
Through hole 42 is corresponded with the described second right through hole 62；
The left end of the internal layer piston 24 is pressed on the described first left ring-shaped step 51 and forms sealing, right-hand member by described interior
Layer back-moving spring 26 is pressed on the described first right ring-shaped step 71, and the outer wall of the internal layer piston 24 and the described first left through hole
41 inwall, the inwall of the first right through hole 61 cooperatively form sealing, and the outer layer piston bush 6 is in the described first left through hole 41
Outer wall and the first right through hole 61 outer wall on, the left end of the outer layer piston 6 is pressed in the described second left ring-shaped step 52
Upper formation sealing, right-hand member are pressed on the described second right ring-shaped step 72 by the outer layer back-moving spring 13, and the outer layer is lived
The inwall of plug 6 cooperatively forms sealing with the outer wall of the outer wall of the described first left through hole 41, the first right through hole 61；
The sky of default size is left between the hole wall of the described first right through hole 61 and the hole wall of the first left through hole 41
Gap, multiple inner groovies 30, the outer layer are accordingly circumferentially evenly arranged with the outer wall of the internal layer piston 24 with the space
Multiple external grooves 31 are provided with correspondingly with the inner groovy 30 on the inwall of piston 6, the bottom of each external groove 31
Portion is equipped with a bearing pin back-moving spring 8, and a bearing pin 9 is headed into the inner groovy by the bearing pin back-moving spring 8 by the space
In 30, a blind hole 20 is correspondingly provided with bearing pin each described 9 in the hole wall of the first right through hole 61, each described blind hole 20
A slide block 22 and slide block back-moving spring 23 are inside equipped with, the slide block 22 is pressed in the bearing pin 9 by the slide block back-moving spring 23
On, the synchronous fortune of the outer layer piston 6 is driven by the bearing pin 9 when the internal layer piston 24 is moved right under left pressure
It is dynamic；
The internal layer piston 24 centrally along being axially arranged with opening piston blind hole 21 to the right, and the internal layer piston 24
Left end be uniformly distributed circumferentially multiple interior connectivity slots 29, for when the internal layer piston 24 is moved right by the piston
Blind hole 21 is connected with the described first left through hole 41；
An outer connectivity slot 32 is correspondingly provided with each described second left through hole 42 on the outer wall of the outer layer piston 6, is used
In the described second right through hole 62 is connected with the described second left through hole 42 when the outer layer piston 6 is moved right.
The incorgruous joint control ball-and-seat of binary channels in the technical scheme is connected and incorgruous with binary channels with double layer continuous oil pipe
Synchronous joint control single current function, by the instrument various instruments matching used with double layer continuous oil pipe can be connected, and reach construction mesh
, compact conformation, the Opening pressure of valve and closing presure are low, and valve can bear high pressure, the safe and reliable point of construction operation after closing.
Internal layer piston is installed with respectively on the described first left ring-shaped step 51 and the second left ring-shaped step 52
Seat 18 and outer layer piston seat 5, the outer layer piston 6 is pressed on the outer layer piston seat 5 and forms sealing, and the internal layer piston 24 is pressed
Sealing is formed on the internal layer piston seat 18.
The inwall of the internal layer piston seat 18 and the left side of the internal layer piston 24 are the conical surface for cooperating, described outer
The layer inwall of piston seat 5 and the left side of the outer layer piston 6 are the conical surface for cooperating, and are sealed more reliable.
The bearing pin 9 is straight pin, and the left side of the slide block 22 is the cambered surface 33 coordinated with the bearing pin, more may be used
Lean on.
It is below a specific embodiment of the present invention：
As shown in Figures 1 to 4, left valve barrel 2 is cylindrical structure, and the inwall smart car of one end is continuous for connecting inside and outside two-layer
Bilayer mother's mouth of oil pipe body, the outer wall smart car of the other end is for connecting the pin thread of right valve barrel 14.At the center of left valve barrel 2
Bore cylindrical hole of one diameter of milling less than internal layer screw thread, i.e., the first left through hole 41, in internal layer coiled tubing in position
The injection and discharge of liquid.Three angles of milling are bored respectively in the position away from the outer rim certain distance of the first left through hole 41 is mutually 120 °
Long round section through hole, i.e., the second left through hole 42 (wherein, quantity is three in the present embodiment, or two or four
Deng), for the injection and discharge of liquid in outer layer coiled tubing.
As shown in Fig. 1,2,5,6, right valve barrel 14 is similarly cylindrical structure, and the inwall smart car of one end is for connecting inside and outside two
The double-deck box of layer coiled tubing body, the inwall smart car of the other end for connecting the box of left valve barrel 2, in right valve barrel 14
Cylindrical hole of one diameter of milling less than internal layer screw thread is bored in center, i.e., the first right through hole 51 is continuously oily for internal layer
The injection and discharge of liquid in pipe.Three angles of milling are bored respectively in the position away from the outer rim certain distance of the first right through hole 51 to be mutually
120 ° of long round section through hole, i.e., the second right through hole 52 (wherein, quantity is three in the present embodiment, or two or
Four etc.), the through hole is consistent with three positions of the second left through hole 42 of the outer rim of left valve barrel 2, for liquid in outer layer coiled tubing
The injection and discharge of body.
As shown in Fig. 1,2,7,8,9, internal layer piston 24 is a cylinder with conical head, in the center portion of the cylinder
Brill is milled with a diameter and is slightly less than the piston blind hole 21 of internal layer screw thread as flow channels, in the side of the cylinder near taper
One end of head has cut respectively three and there is the open of sector crosssection to cross chute, and this crosses chute by boring the circle for milling out in its bottom
Cylindrical hole is connected with piston blind hole 21, and open chute and the cylindrical hole excessively are referred to as interior connectivity slot 29, continuous for internal layer
The injection and discharge of liquid in oil pipe.Periphery outside interior connectivity slot 29, also cuts with respectively annular seal groove and bores milling
There is the inner groovy 30 that three angles are mutually 120 ° as axis pin base.Internal layer piston seat 18 is one and has cone-shaped hole, side
The circular steel ring of three cylindrical shape dowel bushings, 120 ° each other of the angle between each dowel bushing are drilled with face.
As shown in Fig. 1,2,10,11, outer layer piston 6 is to have cut three for liquid in outer layer coiled tubing in side
Injection and the cylinder with sector crosssection open channels (i.e. outer connectivity slot 32) discharged, in the center of the cylinder also
Brill is milled with a cylindrical hole for being assembled in the piston inside left valve barrel 2, on the inwall of the cylindrical hole also
Bore respectively and be milled with three angles and be mutually 120 ° of external groove 31 as axis pin base.Outer layer piston seat 5 be it is with cone-shaped hole,
The circular steel ring of three dowel bushings, 120 ° each other of the angle between each dowel bushing are drilled with side.
Bearing pin 9 can be equal sized stainless steel cylinder, and the diameter outline at the cylinder two ends is less than mid diameter.
As shown in figure 12, slide block 22 can be to be provided with the stainless steel that cambered surface 33 is formed with the semi-circular groove of the same diameter of bearing pin 9 at one end
Cylinder.Outer layer back-moving spring 13, internal layer back-moving spring 26, bearing pin back-moving spring 8, bearing pin back-moving spring 20, slide block reset bullet
Spring 11 is the diameter circular cross-section stainless steel spring different with spring wire thickness with slide block back-moving spring 23.
First, by slide block 22 and slide block back-moving spring 23, the internal layer piston 24 and internal layer reset bullet of sealing ring 19 have been installed additional
Spring 26, and outer layer back-moving spring 13 is individually positioned in the cavity of the right valve barrel 14 for having installed sealing ring 7,12,25,27,28 additional；
Then bearing pin 9 and bearing pin back-moving spring 8 are respectively charged in the axis pin base on the inwall of outer layer piston 6 and are compressed, and lived with outer layer
Plug 6 is pushed together in the outer annular cavity of right valve barrel 14, and now outer layer piston 6 will just touch outer layer back-moving spring 13, pin
Axle 9 will be adjacent to cambered surface 33 of the corresponding slide block 22 away from back-moving spring end, and bearing pin back-moving spring 8 ejects each corresponding bearing pin 9
And it is penetrated in each axis pin base on the surface of internal layer piston 24, so as to make inside and outside two-layer piston seat using the effect of the UNICOM of bearing pin
Become an entirety, reach the purpose of synchronous incorgruous joint control.Wherein, the hole of the hole wall of the first left through hole 41 and the first right through hole 61
Space between wall not only will can accommodate bearing pin 9 and pass through, and also allow bearing pin 9 to move one with ectonexine piston in the space
Fixed stroke.
Then, pin 15,16,17 is respectively adopted outer layer piston seat 5 and internal layer piston seat 18 is separately fixed at into left valve barrel 2
On, and be attached the left valve barrel 2 for assembling and right valve barrel 14 by screw thread, that is, complete the incorgruous joint control ball-and-seat of binary channels
Connection.
It is respectively adopted on the inside and outside two-layer body for be machined into double layer continuous oil pipe and processes pin thread screw thread respectively, then will
Assembling completes and has installed additional the incorgruous joint control ball-and-seat of the binary channels of sealing ring 1 and sealing ring 3 by the left end inwall of left valve barrel 2
Screw thread be tightened on the body of inside and outside two-layer coiled tubing, that is, complete the company of the ball-and-seat and double layer continuous oil pipe body
Connect.
Before onsite application, respectively essence is respectively adopted on the inside and outside two-layer body for be machined into double layer continuous oil pipe one end first
Process pin thread screw thread.During onsite application, the double layer continuous oil pipe with pin thread screw thread is pulled out, by the upper end of left valve barrel 2
Interior male thread is attached with the incorgruous joint control single current valve body of the binary channels for assembling.To be full of clear in double layer continuous oil pipe body
After water, by the inside and outside screwed connection related tool of the lower end of right valve barrel 14, by bulge test in inner layer coiled tubing, observation
The liquid flow artificial situation and pressure drop situation of inside and outside coiled tubing annular space, to check the incorgruous joint control single current valve body of binary channels to be
No sealing.
The function of the incorgruous joint control ball-and-seat of the binary channels is as follows：
As shown in Fig. 1 to 13, Figure 13 is the open mode of the incorgruous joint control ball-and-seat of binary channels, and Fig. 1 is closed mode, will
The incorgruous joint control ball-and-seat of binary channels is by being threadedly mounted to the end of double layer continuous oil pipe body, valve body lower end connected double-layer jet
Negative-pressure irrigation construction tool, by injection head lower going-into-well bottom.
In sand washing, brill mill and de-plugging operation process, when flushing fluid is injected to shaft bottom by internal layer coiled tubing, left valve barrel
Pressure rise in the first left through hole 41 in 2, in the presence of hydraulic pressure, internal layer piston 24 will compress internal layer back-moving spring 26 and take off
From internal layer piston seat 18, and to shaft bottom direction movement, now the liquid in the first left through hole 41 will enter internal layer piston seat 16 and
Gap between internal layer piston 24, and three interior connectivity slots 29 along the side of internal layer piston 24 enter the center of internal layer piston 24
Piston blind hole 21, so that flushing fluid can pass through the hole enters the inner chamber that double-deck jet flow negative pressure rinses construction tool, is carried out
Well-flushing construction operation.Internal layer piston 24 to shaft bottom direction move while, the bearing pin 9 of outer piston in connection will be passed through and drive outer layer
Piston 6 is synchronous to move to shaft bottom direction, and compresses outer layer back-moving spring 13, and now outer layer piston 6 will leave outer layer piston seat 5,
Make to occur in that gap between outer layer piston 6 and outer layer piston seat 5, so that three outer connectivity slots 32 of the side of outer layer piston 6
UNICOM is realized by the gap and the second left through hole 42, the liquid that final shaft bottom is returned out can pass through the outer layer cavity of excess flow valve
Into in outer layer coiled tubing inner chamber, and realize that inner tube is injected, outer tube returns out, formed liquid stream double layer continuous oil pipe inner and outer pipes it
Between circulation, reach the purpose of negative pressure well-flushing in double layer continuous oil pipe pipe.
When there are unexpected incidents and cause the double layer continuous oil pipe break above valve body so that bottom pressure is higher than should
During the overpressure of the incorgruous joint control single current valve body upper end of binary channels, two piston reset springs 13,26 will upspring and make inside and outside
Piston 24,6 resets, and now the conical head of internal layer piston 24 and outer layer piston 6 will respectively be close to internal layer piston seat 18 and outer layer is lived
Obturating plug 5 so that the ball-and-seat can simultaneously effective close inside and outside two-layer coiled tubing passage, prevents the liquid in shaft bottom, gas from returning out,
And the effect of sealing is reached, and it is effectively prevented blowout.
In sum, present disclosure is not limited in the above embodiments, and those skilled in the art can be
Propose other embodiments within the technological guidance's thought of the present invention, but this embodiment be included in the scope of the present invention it
It is interior.
Claims (4)
1. the incorgruous joint control ball-and-seat of a kind of binary channels, it is characterised in that including left valve barrel (2), right valve barrel (14), internal layer piston
(24), outer layer piston (6), internal layer back-moving spring (26), outer layer back-moving spring (13), wherein：
Left valve barrel (2) center is provided with the first left through hole (41), around the described first left through hole (41), described first left logical
Multiple the second left through holes (42) being uniformly distributed circumferentially are additionally provided between hole (41) and the outer wall of the left valve barrel (2), in institute
The left end of the left end and the left valve barrel (2) of stating the first left through hole (41) is machined with respectively for connecting inside and outside two-layer coiled tubing
The internal thread of body, the right-hand member inner wall depression of the first left through hole (41) forms coordinate with the internal layer piston (24) first
Left ring-shaped step (51), is also formed with and the outer layer between the first left through hole (41) and the outer wall of the left valve barrel (2)
The second left ring-shaped step (52) that piston (6) coordinates；
Right valve barrel (14) center is provided with the first right through hole (61), around the described first right through hole (61), described first right
Multiple the second right through holes (62) being uniformly distributed circumferentially are additionally provided between through hole (61) and the outer wall of the right valve barrel (14),
The right-hand member of the first right through hole (61) and the right-hand member of the right valve barrel (14) are machined with respectively continuous for connecting inside and outside two-layer
The internal thread of oil pipe body, the left end inner wall depression of the first right through hole (61) is formed matches somebody with somebody with the internal layer back-moving spring (26)
The the first right ring-shaped step (71) closed, the left end also shape between the first right through hole (61) and the outer wall of the right valve barrel (14)
The second right ring-shaped step (72) that outer layer back-moving spring (13) described in Cheng Youyu coordinates；
The left valve barrel (2) and the right valve barrel (14) are external diameter identical cylinder, and right-hand member and the institute of the left valve barrel (2)
The left end for stating right valve barrel (14) is threaded connection, and the first left through hole (41) is coaxial with the described first right through hole (61), institute
State the second left through hole (42) to correspond with the described second right through hole (62)；
The left end of the internal layer piston (24) is pressed on the described first left ring-shaped step (51) and forms sealing, right-hand member by described interior
Layer back-moving spring (26) is pressed on the described first right ring-shaped step (71), and the outer wall of the internal layer piston (24) and described first
The inwall of left through hole (41), the inwall of the first right through hole (61) cooperatively form sealing, and the outer layer piston bush (6) is described
On the outer wall of the outer wall of the first left through hole (41) and the first right through hole (61), the left end of the outer layer piston (6) is pressed in institute
State formation sealing, right-hand member on the second left ring-shaped step (52) and the described second right annular is pressed in by the outer layer back-moving spring (13)
On step (72), and outer wall, the first right through hole of the inwall of the outer layer piston (6) with the described first left through hole (41)
(61) outer wall cooperatively forms sealing；
The sky of default size is left between the hole wall of the described first right through hole (61) and the hole wall of the described first left through hole (41)
Gap, multiple inner groovies (30) are accordingly circumferentially evenly arranged with the outer wall of the internal layer piston (24) with the space, described
Multiple external grooves (31) are provided with correspondingly with the inner groovy (30) on the inwall of outer layer piston (6), and each is described outer
The bottom of groove (31) is equipped with a bearing pin back-moving spring (8), and the bearing pin back-moving spring (8) is by a bearing pin (9) by described
Space is headed in the inner groovy (30), corresponding with bearing pin each described (9) in the hole wall of the first right through hole (61) to set
There is a blind hole (20), a slide block (22) and slide block back-moving spring (23) are equipped with each described blind hole (20), the slide block is answered
Position spring (23) is pressed in the slide block (22) on the bearing pin (9), and the internal layer piston (24) is transported to the right under left pressure
The outer layer piston (6) is driven to be synchronized with the movement by the bearing pin (9) when dynamic；
The internal layer piston (24) centrally along being axially arranged with opening piston blind hole (21) to the right, and the internal layer piston
(24) left end has been uniformly distributed circumferentially multiple interior connectivity slots (29), for inciting somebody to action when the internal layer piston (24) is moved right
The piston blind hole (21) connects with the described first left through hole (41)；
An outer connectivity slot (32) is correspondingly provided with each described second left through hole (42) on the outer wall of the outer layer piston (6),
For the described second right through hole (62) to be connected with the described second left through hole (42) when the outer layer piston (6) moves right.
2. the incorgruous joint control ball-and-seat of binary channels according to claim 1, it is characterised in that in the described first left ring-shaped step
(51) and on the second left ring-shaped step (52) internal layer piston seat (18) and outer layer piston seat (5), institute are installed with respectively
State outer layer piston (6) and be pressed in formation sealing on the outer layer piston seat (5), the internal layer piston (24) is pressed in the internal layer piston
Sealing is formed on seat (18).
3. the incorgruous joint control ball-and-seat of binary channels according to claim 2, it is characterised in that the internal layer piston seat (18)
The left side of inwall and the internal layer piston (24) is the conical surface for cooperating, the inwall of the outer layer piston seat (5) and described
The left side of outer layer piston (6) is the conical surface for cooperating.
4. the incorgruous joint control ball-and-seat of binary channels according to any one of claim 1 to 3, it is characterised in that the bearing pin
(9) it is straight pin, the left side of the slide block (22) is the cambered surface (33) coordinated with the bearing pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510152589.1A CN104929574B (en) | 2015-04-01 | 2015-04-01 | Dual-channel different-direction joint-control check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510152589.1A CN104929574B (en) | 2015-04-01 | 2015-04-01 | Dual-channel different-direction joint-control check valve |
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| CN108590576B (en) * | 2018-06-21 | 2024-03-01 | 中国石油天然气集团有限公司 | Double-channel ball-passing type reverse check valve |
| CN111827928A (en) * | 2020-07-23 | 2020-10-27 | 邵玉刚 | Check valve for underground double-layer coiled tubing |
| CN111894517A (en) * | 2020-07-23 | 2020-11-06 | 陈少同 | Underground check valve |
| CN111878033B (en) * | 2020-07-24 | 2023-11-10 | 宁波真格液压科技有限公司 | Underground double-channel check valve |
| CN111878034B (en) * | 2020-07-24 | 2023-12-12 | 邵立坤 | Uniflow valve for downhole tool |
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| CN104929574A (en) | 2015-09-23 |
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