CN208830954U - Blowout prevention valve for oil well - Google Patents

Abstract

The utility model provides a kind of blowout prevention valve for oil well, comprising: valve body and sealed core；There is flow-guiding channel in valve body, the inner sidewall of flow-guiding channel has the first surface to match with the lateral wall of sealed core, the lateral wall of valve body has the branch line connected with flow-guiding channel inner sidewall, the arrival end of branch line towards flow-guiding channel is obliquely installed, branch line is for accommodating sealed core, there is the push-rod assembly protruded into branch line on branch line, axial direction of the push-rod assembly for by sealed core along branch line is pushed into flow-guiding channel, and it is connected to sealed core between push-rod assembly and first surface, with closed valve.Blowout prevention valve for oil well provided in this embodiment, when closing blowout prevention valve for oil well, the impact force for the liquid that sealed core is subject to is small, convenient for closing.

Description

Blowout prevention valve for oil well

Technical field

The utility model relates to oilwell drilling blowout prevention technology field more particularly to a kind of blowout prevention valve for oil well.

Background technique

During oilwell drilling, connecting and disconnecting drill rod is one of them important operation.When connecting and disconnecting drill rod, before drilling well To prediction of formation pressure there are caused by deviation or the human factor and other unpredictable factors of work progress, unloading Easily occurs oil well bottom pressure in drilling rod operation process less than strata pressure situation.When oil well bottom pressure is less than strata pressure When, it will lead to well mouth of oil well and overflow occur and gush well, blowout can occur when serious.

In the prior art, when overflow well kick occurs in well head, the drilling rod with plug valve is put into oil well with pneumatic winch, By the drill string connection in drilling rod and oil well with plug valve, the liquid in the drill string in oil well is blocked by plug valve, then Outlet or the blow valve for closing the high pressure line on ground carry out pressure release to oil well, and control oil well gushes well.

But there is serious blowout, high pressure well stream generates greater impact power to the astrosphere of plug valve, leads to plug valve It is closed after installation difficult.

Utility model content

The utility model provides a kind of blowout prevention valve for oil well, solves and serious blowout is occurring, high pressure well stream is to plug valve Astrosphere generates greater impact power, and difficult problem is closed after causing plug valve to be installed.

Blowout prevention valve for oil well provided by the utility model, comprising: valve body and sealed core；

There is flow-guiding channel, the inner sidewall of flow-guiding channel has the first song to match with the lateral wall of sealed core in valve body Face, the lateral wall of valve body have the branch line connected with flow-guiding channel inner sidewall, entrance of the branch line towards flow-guiding channel End is obliquely installed, and branch line has the push-rod assembly protruded into branch line, push rod on branch line for accommodating sealed core Axial direction of the component for by sealed core along branch line is pushed into flow-guiding channel, and sealed core is made to be connected to push-rod assembly and first Between curved surface, with closed valve.

As a kind of optional mode, blowout prevention valve for oil well provided by the utility model,

Push-rod assembly includes closure member, rotary shaft and bushing, and bushing covers the inner sidewall in branch line, bushing be used for it is close Core contact is sealed, closure member is used to close the end of branch line, and rotary shaft passes through closure member and connects with bushing by threaded coaxial It connects, with when rotary shaft rotates, sealed core is pushed into flow-guiding channel by bushing along the axial movement of branch line.

As a kind of optional mode, blowout prevention valve for oil well provided by the utility model,

Push-rod assembly further includes guiding mechanism, and the lateral wall of bushing, the guide direction of guiding mechanism is arranged in guiding mechanism It is axial parallel with branch line.

As a kind of optional mode, blowout prevention valve for oil well provided by the utility model,

There is support sleeve, support sleeve is socketed in flow-guiding channel, and the first end of support sleeve has inclined second in valve body Curved surface, lateral surface of second curved surface for the support bushing when bushing protrudes into flow-guiding channel, the second curved surface and branch line it is interior Side wall contact position is smoothly connected.

As a kind of optional mode, blowout prevention valve for oil well provided by the utility model,

It further include double male joint, double male joint is inserted into flow-guiding channel through the arrival end of flow-guiding channel, and supports support sleeve Second end.

As a kind of optional mode, blowout prevention valve for oil well provided by the utility model,

The lateral wall of support sleeve second end has shoulder, and the inner sidewall of flow-guiding channel has the groove to match with shoulder, The lateral wall of shoulder and the inner sidewall of groove abut against.

As a kind of optional mode, blowout prevention valve for oil well provided by the utility model,

It further include positioning component, positioning component is for fixing the relative position between shoulder and groove, to prevent support sleeve It is rotated in flow-guiding channel inner sidewall.

As a kind of optional mode, blowout prevention valve for oil well provided by the utility model,

It further include sealing element and bearing, bearing is socketed on the rotary shaft, and bearing is located at rotary shaft and closure member splicing position, rotation There is protrusion, the contacted inner surfaces of protrusion and closure member connect and by sealing element sealing in shaft.

As a kind of optional mode, blowout prevention valve for oil well provided by the utility model,

It further include handle, handle is connected on the side wall that rotary shaft is located at outside branch line.

As a kind of optional mode, blowout prevention valve for oil well provided by the utility model,

The internal diameter of support sleeve and the internal diameter of double male joint be all larger than or equal to the drill string in oil well internal diameter.

Blowout prevention valve for oil well provided by the utility model has flow-guiding channel in valve body, leads by setting valve body and sealed core The inner sidewall of circulation road has first surface, and the lateral wall of valve body has the branch line connected with flow-guiding channel inner sidewall, point Bye-pass has the push-rod assembly protruded into branch line on branch line, when pushing away in branch line for accommodating sealed core When bar assembly pushes away sealed core along the axial direction of branch line, the side of sealed core flow direction of fluid along flow-guiding channel, which enters, is led In circulation road, relative to the flow direction rotational valve core in existing valve, being directly perpendicular to fluid in flow-guiding channel, this implementation The blowout prevention valve for oil well that example provides, when closing blowout prevention valve for oil well, the impact force for the liquid that sealed core is subject to is small, convenient for closing.Especially It is adapted to install with drill string, the high pressure well stream with greater impact power in closing drill string.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is the overall structure diagram of blowout prevention valve for oil well provided by the embodiment of the utility model；

Fig. 2 is the structural schematic diagram of blowout prevention valve for oil well another kind state provided by the embodiment of the utility model；

Fig. 3 is the structural schematic diagram of valve body in blowout prevention valve for oil well provided by the embodiment of the utility model；

Fig. 4 is the connection figure of bushing and rotary shaft in blowout prevention valve for oil well provided by the embodiment of the utility model；

Fig. 5 is the connection figure of branch line and closure member in blowout prevention valve for oil well provided by the embodiment of the utility model；

Fig. 6 is the structural schematic diagram of support sleeve in blowout prevention valve for oil well provided by the embodiment of the utility model.

Description of symbols:

100-valve bodies；

101-flow-guiding channels；1011-first surfaces；

102-branch lines；1021-closure members；1022-rotary shafts；10221-protrusions；1023-bushings； 1024-guide rails；1025-sliding blocks；

103-support sleeves；1031-shoulders；10311-slots；1032-the second curved surface；

104-grooves；

200-sealed cores；

300-double male joints；

400-positioning components；

500-bearings；

600-handles.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In the description of the utility model specification, it is to be understood that the instructions such as term " inner sidewall ", " lateral wall " Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification Description, rather than the device or element of indication or suggestion meaning must have a particular orientation, constructed and grasped with specific orientation Make, therefore should not be understood as limiting the present invention.

In the present invention unless specifically defined or limited otherwise, the terms such as term " connection " shall be understood in a broad sense, For example, it may be being fixedly connected, it is also possible to the connection that can unload, or integral；It can be mechanical connection, be also possible to be electrically connected Or it can communicate with each other；It can be directly connected, can also can be inside two elements indirectly connected through an intermediary The interaction relationship of connection or two elements.For the ordinary skill in the art, it can manage as the case may be Solve the concrete meaning of above-mentioned term in the present invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or hidden It include one or more of the features containing ground.

In the present invention unless specifically defined or limited otherwise, fisrt feature can be in the "upper" of second feature Directly contacted including the first and second features, also may include the first and second features be not direct contact but by them it Between other characterisation contact.

In connection perhaps dismounting drilling rod due to drilling well before to prediction of formation pressure, there are deviations or the people of work progress It is less than ground caused by factor and other unpredictable factors, easily to occur oil well bottom pressure in connecting and disconnecting drill rod operation process Stressor layer situation.When oil well bottom pressure is less than strata pressure, it will lead to well mouth of oil well and overflow occur and gush well, serious Shi Huifa Raw blowout.When overflow well kick occurs in well head, the drilling rod with plug valve is put into oil well with pneumatic winch or crane, operation Personnel connect the drill string in drilling rod and oil well with plug valve, and cut-out tap valve blocks the brill in oil well by plug valve Liquid in column is then shut off outlet or the blow valve of the high pressure line on ground, carries out pressure release to oil well, controls gushing for oil well Well.But there is serious blowout, high pressure well stream generates greater impact power to the astrosphere of plug valve, plug valve is caused to be installed It closes afterwards difficult.

To solve the above-mentioned problems, the utility model provides a kind of blowout prevention valve for oil well, by the way that valve body and sealed core is arranged, There is in valve body flow-guiding channel, the inner sidewall of flow-guiding channel has a first surface, the lateral wall of valve body have in flow-guiding channel The branch line that side wall is connected, branch line have the push rod protruded into branch line on branch line for accommodating sealed core Component, when the push-rod assembly in branch line pushes away sealed core along the axial direction of branch line, sealed core fluid along flow-guiding channel The side of flow direction enter in flow-guiding channel, relative in existing valve, be directly perpendicular to fluid in flow-guiding channel The impact force of flow direction rotational valve core, blowout prevention valve for oil well provided in this embodiment, the liquid that sealed core is subject to is small, convenient for closing It closes, is specially adapted to install with drill string, the high pressure well stream with greater impact power in closing drill string.

Fig. 1 is the overall structure diagram of blowout prevention valve for oil well provided by the embodiment of the utility model；Fig. 2 is the utility model The structural schematic diagram for the blowout prevention valve for oil well another kind state that embodiment provides；Fig. 3 is oil well provided by the embodiment of the utility model The structural schematic diagram of valve body in blowout prevention valve；Fig. 4 is bushing and rotary shaft in blowout prevention valve for oil well provided by the embodiment of the utility model Connection figure；Fig. 5 is the connection figure of branch line and closure member in blowout prevention valve for oil well provided by the embodiment of the utility model；Fig. 6 For the structural schematic diagram of support sleeve in blowout prevention valve for oil well provided by the embodiment of the utility model.As shown in figs 1 to 6, the present embodiment The blowout prevention valve for oil well of offer, comprising: valve body 100 and sealed core 200；

There is flow-guiding channel 101, the inner sidewall of flow-guiding channel 101 has the lateral wall phase with sealed core 200 in valve body 100 Matched first surface 1011, the lateral wall of valve body 100 have the branch line 102 connected with 101 inner sidewall of flow-guiding channel, point The arrival end of bye-pass 102 towards flow-guiding channel 101 is obliquely installed, and branch line 102 is for accommodating sealed core 200, branched pipe There is the push-rod assembly protruded into branch line 102, push-rod assembly is used for sealed core 200 along branch line 102 on road 102 It is axially pushed into flow-guiding channel 101, and is connected to sealed core 200 between push-rod assembly and first surface 1011, to close valve Body 100.

It is easy to disassemble in order to easy to connect specifically, valve body 100 with the drill string in oil well for connect, valve body 100 and Drill string in oil well is connected by threaded coaxial, and the flow-guiding channel 101 of valve body 100 for fluid for passing through, that is to say, that valve body 100 with the drill string in oil well when connecting, and flow-guiding channel 101 is axially coincident with drill string；The inner sidewall of flow-guiding channel 101 have with The first surface 1011 that the lateral wall of sealed core 200 matches, in this way, when sealed core 200 and first surface 1011 contact, the One curved surface, 1011 baffle seal core 200 is continued to move to along flow-guiding channel 101, and combines sealed core 200 by first surface 1011 Closed stream lending channel 101, be that the liquid in flow-guiding channel 101 can not circulate.

Branch line 102 and flow-guiding channel 101 are connected, and the arrival end inclination of branch line 102 towards flow-guiding channel 101 is set It sets, that is to say, that the Way in of branch line 102 towards fluid is obliquely installed, in this way, when the push rod in branch line 102 When component pushes away sealed core 200 along the axial direction of branch line 102, the flow direction of fluid along flow-guiding channel 101 of sealed core 200 Side enters in flow-guiding channel 101, relative in existing valve, is directly perpendicular to the flowing side of fluid in flow-guiding channel 101 To rotational valve core, the impact force of blowout prevention valve for oil well provided in this embodiment, the liquid that sealed core 200 is subject to is small, convenient for closing, especially It is adapted to the high pressure well stream with greater impact power.

Optionally, sealed core 200 is ball sealer, and first surface 1011 can be the spherical surface or cone to match with ball sealer Face.

Optionally, valve body 100 is tubulose, and valve body 100 and branch line 102 form the inclined triple-valve body in one end.

Blowout prevention valve for oil well provided in this embodiment, in use, the drill string in valve body 100 and oil well is connected by threaded coaxial It connects, and makes the axially coincident of flow-guiding channel 101 and drill string, it is logical that the high-pressure well stream sprayed in drill string enters the water conservancy diversion in valve body 100 Road 101 pushes push-rod assembly, and sealed core 200 is pushed into flow-guiding channel 101 by push-rod assembly along the axial direction of branch line 102, close The envelope side of the flow direction of fluid along flow-guiding channel 101 of core 200 enters in flow-guiding channel 101, until sealed core 200 abuts Between push-rod assembly and first surface 1011, the shape of grip seal core 200 is formed by first surface 1011 and push-rod assembly Formula, and by the closed stream lending channel 101 of the combination sealed core 200 of first surface 1011, make the high pressure well stream in flow-guiding channel 101 It can not circulate, achieve the purpose that closed valve 100.Open blowout prevention valve for oil well when, move backward push-rod assembly, sealed core 200 into Enter in branch line 102, keeps unimpeded flow-guiding channel 101.

Blowout prevention valve for oil well provided in this embodiment has flow-guiding channel, water conservancy diversion in valve body by setting valve body and sealed core The inner sidewall in channel has first surface, and the lateral wall of valve body has the branch line connected with flow-guiding channel inner sidewall, branch Pipeline has the push-rod assembly protruded into branch line on branch line, when the push rod in branch line for accommodating sealed core When component pushes away sealed core along the axial direction of branch line, sealed core side of the flow direction of fluid along flow-guiding channel enters water conservancy diversion In channel, relative to the flow direction rotational valve core in existing valve, being directly perpendicular to fluid in flow-guiding channel, the present embodiment The impact force of the blowout prevention valve for oil well of offer, the liquid that sealed core is subject to is small, convenient for closing, is specially adapted to install with drill string, envelope Close the high pressure well stream in drill string with greater impact power.

In a kind of concrete implementation mode, push-rod assembly includes closure member 1021, rotary shaft 1022 and bushing 1023, lining Inner sidewall of 1023 sets of the set in branch line 102, bushing 1023 with sealed core 200 for contacting, and closure member 1021 is for closing The end of branch line 102, rotary shaft 1022 passes through closure member 1021 and is connect with bushing 1023 by threaded coaxial, when rotation When shaft 1022 rotates, sealed core 200 is pushed into flow-guiding channel 101 by bushing 1023 along the axial movement of branch line 102.

Optionally, closure member 1021 is that perhaps lid passes through pressure cap or closed with covers branch line 102 and valve body to pressure cap The opposite end of 100 connections.

Specifically, blowout prevention valve for oil well provided in this embodiment, is arranged bushing 1023, lining in the inner sidewall of branch line 102 Internal screw thread is arranged in the inner sidewall of set 1023, and the lateral wall setting of rotary shaft 1022 and the internal screw thread of 1023 inner sidewall of bushing match External screw thread, rotary shaft 1022 be inserted into bushing 1023 in and by screw thread and bushing 1023 it is coaxially connected, due to 1023 sets of bushing In the inner sidewall of branch line 102, that is to say, that the axial direction of bushing 1023 is axial parallel with branch line 102, in this way, When rotary shaft 1022 rotates, axial movement of the bushing 1023 along rotary shaft 1022, axial direction of the bushing 1023 along branch line 102 It is moved in flow-guiding channel 101, while sealed core 200 being pushed into flow-guiding channel 101.It is reversed to revolve when opening blowout prevention valve for oil well Shaft 1022 is rotated, sealed core 200 enters in branch line 102, keeps unimpeded flow-guiding channel 101.

In some embodiments, push-rod assembly may be hydraulic cylinder, and the piston of hydraulic cylinder is contacted with sealed core 200, liquid The piston rod of cylinder pressure and branch line 102 it is axial parallel, by the piston rod of hydraulic cylinder along the axial movement of branch line 102 Sealed core 200 is pushed into flow-guiding channel 101.

In a specific embodiment, push-rod assembly further includes guiding mechanism, and bushing 1023 is arranged in guiding mechanism Lateral wall, the guide direction of guiding mechanism are axial parallel with branch line 102.Specifically, passing through guiding mechanism guide bushing 1023 is mobile, prevents the moving direction of bushing 1023 from changing.

In one possible implementation, guiding mechanism includes guide rail 1024 and sliding block 1025, and the setting of guide rail 1024 exists The lateral wall of bushing 1023, and the length direction and bushing of guide rail 1024 is arranged in the inner sidewall of branch line 102, sliding block 1025 1023 axial direction is parallel, and sliding block 1025 is inserted into guide rail 1024, when bushing 1023 is along the axial movement of rotary shaft 1022, setting It is mobile also along the length direction of guide rail 1024 in the sliding block 1025 of the lateral wall of bushing 1023, pass through the rotary shaft being parallel to each other The movement for the guide bushing 1023 that 1022 axial direction and the length direction of guide rail 1024 limit jointly, prevents the movement of bushing 1023 Direction changes.It is of course also possible to be arranged in guide rail 1024 on the lateral wall of bushing 1023, the setting of sliding block 1025 is dividing The inner sidewall of bye-pass 102.Optionally, guide rail 1024 can be the keyway of ellipse, and sliding block 1025 can be and keyway phase The oval sliding block matched, the present embodiment are not limited thereto.

Further, blowout prevention valve for oil well provided in this embodiment, has support sleeve 103 in valve body 100, and 103 sets of support sleeve It connects in flow-guiding channel 101, the first end of support sleeve 103 has inclined second curved surface 1032, and the second curved surface 1032 is for working as The lateral surface of support bushing 1023 when bushing 1023 protrudes into flow-guiding channel 101, the inside of the second curved surface 1032 and branch line 102 Wall contact position is smoothly connected.

Support sleeve 103 is socketed in flow-guiding channel 101, that is to say, that in the axial direction and flow-guiding channel 101 of support sleeve 103 The flow direction of liquid is identical, and bushing 1023 is located in branch line 102, and along the axial movement of branch line 102, that is, Say when bushing 1023 protrudes into flow-guiding channel 101, bushing 1023 it is inclined, therefore, inclined second curved surface 1032 is set, is led to The lateral surface of the inclined support of second curved surface 1032 support bushing 1023 when bushing 1023 protrudes into flow-guiding channel 101 is crossed, in order to Reach better support effect, the lateral surface that the second curved surface 1032 is contacted with bushing 1023 matches.Since bushing 102 is along branch Pipeline 102 moves axially to flow-guiding channel 101, and is supported by the second curved surface 1032, therefore, by the second curved surface 1032 and divides The inner sidewall contact position of bye-pass 102 is smoothly connected, so that bushing 1023 smoothly enters the second curved surface 1032 and is supported on the On two curved surfaces 1032.

Blowout prevention valve for oil well provided in this embodiment further includes double male joint 300, and double male joint 300 is through flow-guiding channel 101 Arrival end is inserted into flow-guiding channel 101, and supports the second end of support sleeve 103.Make valve body 100 and oil by double male joint 300 Drill string in well is connected by threaded coaxial, and supports support sleeve 103 by double male joint 300.

Specifically, the lateral wall of 103 second end of support sleeve has a shoulder 1031, the inner sidewall of flow-guiding channel 101 have with The inner sidewall of the groove 104 that shoulder 1031 matches, the lateral wall and groove 104 of shoulder 1031 abuts against.Pass through shoulder 1031 Cooperate with groove 104, fix position between support sleeve 103 and flow-guiding channel 101, and passes through the support support of double male joint 300 Support sleeve 103, is fixed in flow-guiding channel 101 by the second end of set 103.When disassembly support sleeve 103 is cleaned, it is only necessary to Removing double male joint 300 can take out support sleeve 10 out of flow-guiding channel 101.

Blowout prevention valve for oil well provided in this embodiment, the internal diameter of support sleeve 103 and the internal diameter of double male joint 300 are all larger than or wait In the internal diameter of the drill string in oil well.It should be noted that double male joint 300 is connect with the drill string in oil well by threaded coaxial, By the internal diameter of double male joint 300 be set greater than or equal to the drill string in oil well internal diameter, the height of drill string when installation in oil well Kill-job stream is small to the impact force of double male joint 300, facilitates the drill string in connection double male joint 300 and oil well.That is, water conservancy diversion The internal diameter of the smallest internal diameter and the drill string being equal in oil well in channel 101, in this way, the high pressure well stream sprayed is to flow-guiding channel 101 Impact force is small, facilitates installation blowout prevention valve for oil well provided in this embodiment.

Optionally, the arrival end of flow-guiding channel 101 and the internal diameter of outlet end can be greater than the straight of 101 middle part of flow-guiding channel Diameter, that is to say, that the arrival end of flow-guiding channel 101 and outlet end all have reduce in the middle part of flow-guiding channel 101 horn-like and connect Mouthful, facilitate on valve body 100 to the drill string in installation oil well, optionally, the both ends of double male joint 300 are horn-like interface phase Matched round table-like connecting pin, screw thread are located at the side of round table-like connecting pin, when double male joint 300 by flow-guiding channel 101 with When valve body 100 connects, the lateral wall of double male joint 300 is concordant with the lateral wall of valve body 100.

Since the second curved surface 1032 is located at the first end of support sleeve 103, the second curved surface 1032 is obliquely installed, and the second curved surface 1032 lateral surface for the support bushing 1023 when bushing 1023 protrudes into flow-guiding channel 101, it is logical that support sleeve 103 is placed on water conservancy diversion When road 101, the position that second curved surface 1032 needs to have fixed on support sleeve 103 prevents support sleeve 103 in flow-guiding channel 101 Rotation in inner sidewall, in this way, the lateral surface of support bushing 1023 when protruding into flow-guiding channel 101 could be supported smoothly.Therefore, originally The blowout prevention valve for oil well that embodiment provides further includes positioning component 400, and positioning component 400 is for fixing shoulder 1031 and groove 104 Between relative position, to prevent support sleeve 103 from rotating in 101 inner sidewall of flow-guiding channel.

Specifically, positioning component 400 can blind hole, setting supply on shoulder 1031 in groove 104 for positioning pin, setting The slot 10311 of positioning pin insertion or hole when installing support sleeve 103, positioning pin are inserted into blind hole, positioning pin is inserted into shoulder Slot 10311 or hole on 1031, with the relative position fixed between shoulder 1031 and groove 104.Positioning component 400 can also be with For be arranged in groove 104 positioning pin, be arranged on shoulder 1031 for positioning pin insertion slot 10311 or hole, installation branch When support set 103, positioning pin is inserted into slot 10311 or hole on shoulder 1031, to fix between shoulder 1031 and groove 104 Relative position.Positioning pin can also be arranged on shoulder 1031, principle and above-mentioned identical, the present embodiment is not limited thereto.

In a kind of concrete implementation mode, blowout prevention valve for oil well provided in this embodiment further includes sealing element and bearing 500, bearing 500 is socketed in rotary shaft 1022, and bearing 500 is located at rotary shaft 1022 and 1021 splicing position of closure member, rotary shaft There is protrusion 10221, protrusion 10221 and the contacted inner surfaces of closure member 1021 connect, and seal by sealing element on 1022.

Optionally, sealing element is sealing ring.

Optionally, through-hole is provided on closure member 1021, bearing 500 is installed in the through hole, and rotary shaft 1022 passes through axis It holds 500 to protrude into branch line 102, and is connected through a screw thread with the bushing 1023 in branch line 102, setting bearing 500 makes 1022 smooth rotation of rotary shaft, it is more laborsaving, while connecing and leading to by the contacted inner surfaces of protrusion 10221 and closure member 1021 Overstocked seals avoid high pressure well stream from flowing out from closure member 1021.

In order to facilitate rotation rotary shaft 1022, blowout prevention valve for oil well provided in this embodiment further includes handle 600, handle 600 It is connected on the side wall that rotary shaft 1022 is located at outside branch line 102.Optionally, handle 600 also can connect in rotary shaft 1022 are located at the end outside branch line 102, as long as rotary shaft 1022 can be made to rotate, this implementation by rotational handle 600 Example is not limited thereto.

Blowout prevention valve for oil well provided by the above embodiment, the smallest internal diameter and the drill string that is equal in oil well is interior in flow-guiding channel Diameter facilitates installation blowout prevention valve for oil well provided in this embodiment in this way, the high pressure well stream sprayed is small to 101 impact force of flow-guiding channel. Valve body 100 is three-port structure, is convenient for pneumatic winch fixed hoisting blowout prevention valve for oil well provided in this embodiment；It is provided in this embodiment Blowout prevention valve for oil well, overall structure is simple, securely and reliably, drill string high pressure well stream can be blocked under high well stream pressure working condition；This implementation The blowout prevention valve for oil well that example provides, switch is convenient, can be repeated several times switch.

In the description of the utility model specification, it is to be understood that term " some embodiments ", " one embodiment " Deng description to mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained in this practical new In at least one embodiment or example of type.In the present specification, schematic expression of the above terms are necessarily directed to Identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be at any one or more It can be combined in any suitable manner in a embodiment or example.In addition, those skilled in the art can will be described in this specification Different embodiments or examples are engaged and are combined.

Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims (10)

1. a kind of blowout prevention valve for oil well characterized by comprising valve body and sealed core；

There is flow-guiding channel, the inner sidewall of the flow-guiding channel has to match with the lateral wall of the sealed core in the valve body First surface, the lateral wall of the valve body has the branch line connected with the flow-guiding channel inner sidewall, the branched pipe The arrival end of road towards the flow-guiding channel is obliquely installed, and the branch line is for accommodating the sealed core, the branched pipe Road has the push-rod assembly protruded into the branch line, and the push-rod assembly is used for the sealed core along the branched pipe The axial direction on road is pushed into the flow-guiding channel, and make the sealed core be connected to the push-rod assembly and the first surface it Between, to close the valve body.

2. blowout prevention valve for oil well according to claim 1, which is characterized in that the push-rod assembly includes closure member, rotary shaft And bushing, the bushing cover the inner sidewall in the branch line, the bushing with the sealed core for contacting, the closing Part is used to close the end of the branch line, and rotary shaft passes through the closure member and connected with the bushing by threaded coaxial It connects, with when rotary shaft rotates, the sealed core is pushed into the water conservancy diversion along the axial movement of the branch line by the bushing In channel.

3. blowout prevention valve for oil well according to claim 2, which is characterized in that the push-rod assembly further includes guiding mechanism, institute The lateral wall that the bushing is arranged in guiding mechanism is stated, the guide direction of the guiding mechanism and the axial direction of the branch line are flat Row.

4. blowout prevention valve for oil well according to claim 2, which is characterized in that have support sleeve, the support in the valve body It is socketed in the flow-guiding channel, the first end of the support sleeve has inclined second curved surface, and second curved surface is used for The lateral surface of the bushing, second curved surface and the branch line are supported when the bushing protrudes into the flow-guiding channel Inner sidewall contact position is smoothly connected.

5. blowout prevention valve for oil well according to claim 4, which is characterized in that it further include double male joint, the double male joint warp The arrival end of the flow-guiding channel is inserted into the flow-guiding channel, and supports the second end of the support sleeve.

6. blowout prevention valve for oil well according to claim 5, which is characterized in that the lateral wall of the support sleeve second end has platform Shoulder, the inner sidewall of the flow-guiding channel have the groove to match with the shoulder, the lateral wall of the shoulder and the groove Inner sidewall abut against.

7. blowout prevention valve for oil well according to claim 6, which is characterized in that further include positioning component, the positioning component is used Relative position between the fixation shoulder and the groove, to prevent the support sleeve in the flow-guiding channel inner sidewall Rotation.

8. according to the described in any item blowout prevention valve for oil well of claim 2-7, which is characterized in that further include sealing element and bearing, institute It states bearing to be socketed in the rotary shaft, the bearing is located at the rotary shaft and the closure member splicing position, the rotary shaft Going up has protrusion, and the contacted inner surfaces of the protrusion and the closure member, which connect and pass through the sealing element, to be sealed.

9. according to the described in any item blowout prevention valve for oil well of claim 2-7, which is characterized in that further include handle, the handle connects It connects and is located on the side wall outside the branch line in the rotary shaft.

10. blowout prevention valve for oil well according to claim 5, which is characterized in that the internal diameter of the support sleeve and double public affairs are short The internal diameter of section be all larger than or equal to the drill string in oil well internal diameter.