CN105822250A - shear ram blowout preventer - Google Patents
shear ram blowout preventer Download PDFInfo
- Publication number
- CN105822250A CN105822250A CN201510009471.3A CN201510009471A CN105822250A CN 105822250 A CN105822250 A CN 105822250A CN 201510009471 A CN201510009471 A CN 201510009471A CN 105822250 A CN105822250 A CN 105822250A
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- CN
- China
- Prior art keywords
- shearing
- shear ram
- flashboard
- sealing bar
- down cut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 114
- 238000010008 shearing Methods 0.000 claims abstract description 102
- 239000000463 material Substances 0.000 claims description 8
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 17
- 238000001125 extrusion Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Shearing Machines (AREA)
Abstract
The present invention provides a shear ram blowout preventer comprising: the shear seal structure comprises an upper shear gate plate, a lower shear gate plate and a shear seal strip, wherein a seal groove is arranged on the plane of a knife edge of the upper shear gate plate, the shearing sealing strip is arranged in the sealing groove, and a reserved distance is reserved between the shearing sealing strip and the bottom of the sealing groove, in the shearing flashboard blowout preventer provided by the invention, when the cutting edge of the lower shearing flashboard moves to the position contacted with the shearing sealing strip at the bottom of the upper shearing flashboard for sealing, the upper shearing flashboard and the lower shearing flashboard simultaneously move to extrude the shearing sealing strip, because the reserved distance is arranged between the shearing sealing strip and the bottom of the sealing groove, the shearing sealing strip has a certain yielding space when being extruded, the acting force applied to the shearing sealing strip when the lower shearing flashboard extrudes the shearing sealing strip is reduced, thereby can protect the shearing sealing strip not damaged by shearing flashboard blade down, increase of service life.
Description
Technical field
The present invention relates to petroleum drilling technology field, particularly relate to a kind of shear ram preventer.
Background technology
Preventer is the visual plant in oil drilling, and its Main Function is the generation preventing gas blowout accident in drilling process.Preventer is divided into ram preventer and annular preventer two class according to structure & working mechanism, and wherein, the oil cylinder etc. that ram preventer is mainly closed by pressure-bearing shell, side door, flashboard, driving flashboard forms.Ram preventer can install outfit shear ram, when in the operation process such as drilling well, well workover or formation testing in case of emergency, close shear ram, cut off drilling tool in well, realize simultaneously pit shaft seal.
Specifically, the shear ram of shear ram preventer uses in pairs, it is divided into shear ram and down cut flashboard, the sealing of shear ram preventer is to be realized by the shearing sealing bar in shear ram body knife-edge plane, in prior art, the top using shearing sealing bar directly to contact with upper shear ram seals structure, after drilling rod cut off by shear ram preventer, on piston driving, shear ram and down cut flashboard continue to move ahead, the shearing sealing bar that down cut flashboard cutting edge slips over and compresses in shear ram knife-edge plane, thus realize sealing.
But, use prior art, when the position that down cut flashboard cutting edge moves to contact with the shearing sealing bar bottom upper shear ram seals, the contact stress that down cut flashboard cutting edge compression shear sealing strip produces is bigger, easily sealing strip is extruded bad, in the case of particularly down cut flashboard moving process being mingled with solid particle, it is easy to scratch shearing sealing bar, even directly shearing sealing bar is hauled out, greatly reduce sealing property so that the operation process such as drilling well, well workover or formation testing exist great hidden danger.
Summary of the invention
The present invention provides a kind of shear ram preventer, the problem that when position contacted in order to solve down cut flashboard cutting edge in prior art to move to seals, shearing sealing bar is easily scratched with the shearing sealing bar bottom upper shear ram.
The present invention provides a kind of shear ram preventer, including: upper shear ram, down cut flashboard and shearing sealing bar, the knife-edge plane of described upper shear ram is provided with seal groove, described shearing sealing bar is placed in described seal groove, is provided with preset space between described shearing sealing bar and the bottom of described seal groove.
In an embodiment of the present invention, the knife-edge plane both sides of described upper shear ram are provided with two side plates, and said two side plate is equipped with groove.
In an embodiment of the present invention, the both sides of described shearing sealing bar are provided with and the projection of described groove match, and described projection is fastened in described groove.
In an embodiment of the present invention, said two side plate is fixing with the flashboard slot of described upper shear ram is connected.
In an embodiment of the present invention, the material of described shearing sealing bar is rubber.
In an embodiment of the present invention, the material of described shearing sealing bar is nitrile rubber.
In an embodiment of the present invention, the cutting edge of described down cut flashboard is V-type.
In an embodiment of the present invention, the chamfering of the cutting edge of down cut flashboard is 15 degree.
In an embodiment of the present invention, described preset space is 0.5mm.
The shear ram preventer that the present invention provides, when the position that down cut flashboard cutting edge moves to contact with the shearing sealing bar bottom upper shear ram seals, upper shear ram and down cut flashboard move extrusion shearing sealing strip simultaneously, owing to being provided with preset space between shearing sealing bar and the bottom of seal groove, shearing sealing bar is made to have certain yielding space when being squeezed, reduce the active force that when shearing sealing bar is extruded by down cut flashboard, shearing sealing bar is subject to, such that it is able to protection shearing sealing bar is not damaged by down cut flashboard cutting edge, increase the service life.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the shear ram open mode of the shear ram preventer that Fig. 1 provides for the present invention；
The floor map of the shear ram of the shear ram preventer that Fig. 2 provides for the present invention；
The explosive view of the upper shear ram of the shear ram preventer that Fig. 3 provides for the present invention；
The structural representation of the down cut flashboard of the shear ram preventer that Fig. 4 provides for the present invention；
The cross-sectional view of the shear ram closed mode of the shear ram preventer that Fig. 5 provides for the present invention.
Description of reference numerals:
1: upper shear ram；
2: down cut flashboard；
3: shearing sealing bar；
4: the knife-edge plane of upper shear ram；
5: seal groove；
6: preset space；
7: the first side plates；
8: the second side plates；
9: groove；
10: protruding；
11: flashboard slot；
12: cutting edge；
13: cutting edge chamfering；
14: upper knife body；
15: lower knife body；
16: top seals.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
The structural representation of the shear ram open mode of the shear ram preventer that Fig. 1 provides for the present invention, the floor map of the shear ram of the shear ram preventer that Fig. 2 provides for the present invention, the explosive view of the upper shear ram of the shear ram preventer that Fig. 3 provides for the present invention, such as Fig. 1, shown in Fig. 2 and Fig. 3, shear ram preventer includes: upper shear ram 1, down cut flashboard 2 and shearing sealing bar 3, the knife-edge plane 4 of upper shear ram is provided with seal groove 5, shearing sealing bar 3 is placed in seal groove 5, preset space 6 it is provided with between the bottom of shearing sealing bar 3 and seal groove 5.
It should be noted that the rear portion of upper shear ram 1 of shear ram preventer is connected with the take-off lever of hydraulic planger pump, the rear portion of down cut flashboard 2 of shear ram preventer is connected with the take-off lever of hydraulic planger pump.Wherein, hydraulic control system carry out hydraulic planger pump and open or close upper shear ram 1 and down cut flashboard 2.
In the present embodiment; when the position that down cut flashboard cutting edge moves to contact with the shearing sealing bar bottom upper shear ram seals; upper shear ram and down cut flashboard move extrusion shearing sealing strip simultaneously; owing to being provided with preset space between shearing sealing bar and the bottom of seal groove; shearing sealing bar is made to have certain yielding space when being squeezed; reduce the active force that when shearing sealing bar is extruded by down cut flashboard, shearing sealing bar is subject to; such that it is able to protection shearing sealing bar is not damaged by down cut flashboard cutting edge, increase the service life.
In another embodiment, include at above-mentioned shear ram preventer: on the basis of upper shear ram 1, down cut flashboard 2 and shearing sealing bar 3, knife-edge plane 4 both sides of upper shear ram are provided with two side plates, and two side plates are equipped with groove 9.
Specifically, two side plates that knife-edge plane 4 both sides of upper shear ram are arranged are the first side plate 7 and the second side plate 8 respectively.
More preferably, groove 9 and the groove 9 of the second side plate 8 on first side plate 7 can be rectangle, but this is not restricted, such as, the shape of the groove 9 of the groove 9 on the first side plate 7 and the second side plate 8 is set to the shape such as triangle, irregular shape changeable also dependent on concrete condition.
Further, the first side plate 7 can arrange multiple groove 9, the second side plate 8 can also arrange multiple groove 9.
Alternatively, the both sides of shearing sealing bar 3 are provided with the projection 10 matched with groove 9, and protruding 10 are fastened in groove 9.To prevent shearing sealing bar 3 from coming off.
More preferably, the projection of shearing sealing bar 3 both sides is rectangle, but this is not restricted, the protruding shape of shearing sealing bar 3 both sides and the groove 9 on the first side plate 7 and the mating shapes of the groove 9 on the second side plate 8.
It should be noted that the projection 10 of shearing sealing bar 3 both sides can be multiple, the number that wherein shearing sealing bar both sides are protruding is equal with the number of the number of the first side plate 7 upper groove 9 and the second side plate 8 upper groove 9 respectively.
Further, two side plates are fixed with the flashboard slot 11 of upper shear ram 1 and are connected, say, that the flashboard slot 11 of the first side plate 7 and upper shear ram 1 is fixing to be connected, and the flashboard slot 11 of the second side plate 8 and upper shear ram 1 is fixing to be connected.
Further, in another embodiment, the material of shearing sealing bar 3 is rubber.
More preferably, the material of shearing sealing bar 3 is nitrile rubber.
It should be noted that the material of shearing sealing bar 3 can be any resistance to H2S and CO2The material of corrosion.
Further, the top of upper shear ram 1 is provided with top sealing 16, and the top of down cut flashboard 2 is provided with top sealing 16.
Further, the both sides of upper shear ram 1 are respectively provided with side seal, the both sides of down cut flashboard 2 are respectively provided with side seal (not shown in side seal figure), it is alternatively possible to use above-mentioned first side plate 7 and the second side plate 8 that shear ram preventer is carried out side seal.
It should be noted that the top of upper shear ram 1 be provided with top seal 16 and the top of down cut flashboard 2 be provided with top and seal the top of 16 tops making shear ram 1 and down cut flashboard 2 and realize sealing.The both sides of upper shear ram 1 are respectively provided with the both sides of side seal and down cut flashboard 2 and are respectively provided with side seal and make the both sides of shear ram 1 and the both sides of down cut flashboard 2 realize sealing.
Preferably, the sealing surface of shearing sealing bar 3 is divided into cambered surface and plane two parts.Specifically, can specifically arrange according to the shape of seal groove 5, not limit at this.
It should be noted that the cambered surface part of the sealing surface of shearing sealing bar 3 is used for the surface of sealing drilling rod, the planar section of the sealing surface of shearing sealing bar 3 is used for sealing the shut-in well boundary plane between shear ram and down cut flashboard.
nullIn the present embodiment，When the position that down cut flashboard cutting edge moves to contact with the shearing sealing bar bottom upper shear ram seals，Upper shear ram and down cut flashboard move extrusion shearing sealing strip simultaneously，Owing to being provided with preset space between shearing sealing bar and the bottom of seal groove，Shearing sealing bar is made to have certain yielding space when being squeezed，Reduce the active force that when shearing sealing bar is extruded by down cut flashboard, shearing sealing bar is subject to，Such that it is able to protection shearing sealing bar is not damaged by down cut flashboard cutting edge，Increase the service life，In addition，Owing to the knife-edge plane both sides of upper shear ram are provided with two side plates，It is equipped with groove on two side plates，The both sides of shearing sealing bar are provided with the projection with groove match，When making shear ram and down cut flashboard move extrusion shearing sealing strip, shearing sealing bar is not easy to come off simultaneously.
The structural representation of the down cut flashboard of the shear ram preventer that Fig. 4 provides for the present invention, as shown in Figure 4, more preferably, the cutting edge 12 of down cut flashboard 2 is V-type.
Wherein, the cutting edge 12 of down cut flashboard 2 is V-type, when upper shear ram 1 and down cut flashboard 2 are under the effect of the take-off lever promotion of hydraulic planger pump, close to each other, and energy quick shearing drilling rod makes have no progeny two sections of drilling rods quickly separate simultaneously.
Preferably, the cutting edge chamfering 13 of down cut flashboard 2 is 15 degree.
Wherein, when the cutting edge chamfering 13 of down cut flashboard 2 is 15 degree, when upper shear ram 1 and down cut flashboard 2 are under the effect of the take-off lever promotion of hydraulic planger pump, it are more beneficial for quick shearing drilling rod, and make have no progeny two sections of drilling rods quickly separate.
In another embodiment, it is preferable that be provided with preset space 6 between the bottom of shearing sealing bar 3 and seal groove 5, it is preferable that preset space is 0.5mm.
nullIn the present embodiment，When the position that down cut flashboard cutting edge moves to contact with the shearing sealing bar bottom upper shear ram seals，Upper shear ram and down cut flashboard move extrusion shearing sealing strip simultaneously，Owing to being provided with preset space between shearing sealing bar and the bottom of seal groove，Shearing sealing bar is made to have certain yielding space when being squeezed，Reduce the active force that when shearing sealing bar is extruded by down cut flashboard, shearing sealing bar is subject to，Such that it is able to protection shearing sealing bar is not damaged by down cut flashboard cutting edge，Increase the service life，In addition，Owing to the knife-edge plane both sides of upper shear ram are provided with two side plates，It is equipped with groove on two side plates，The both sides of shearing sealing bar are provided with the projection with groove match，When making shear ram and down cut flashboard move extrusion shearing sealing strip, shearing sealing bar is not easy to come off simultaneously.
The cross-sectional view of the shear ram closed mode of the shear ram preventer that Fig. 5 provides for the present invention, when upper shear ram 1 and down cut flashboard 2 are under the effect of the take-off lever promotion of hydraulic planger pump, close to each other, the upper knife body 14 of upper shear ram 1 is mutually nested with the lower knife body 15 of down cut flashboard 2 to be merged, during quick shearing drilling rod, two sections of drilling rods separate, when the position that the cutting edge 12 of down cut flashboard 2 moves to contact with the shearing sealing bar 3 bottom upper shear ram 1 seals, upper shear ram 1 and down cut flashboard 2 move extrusion shearing sealing strip 3 simultaneously and realize sealing.
The detailed process of shear ram preventer shut-in well is: operation hydraulic control system, the take-off lever of hydraulic planger pump is acted on by hydraulic energy, upper shear ram 1 and down cut flashboard 2 are under the take-off lever impetus of hydraulic planger pump, produce shut-in well power, i.e. go up shear ram 1 and down cut flashboard 2 merges, during upper shear ram 1 and down cut flashboard 2 merge, first the cambered surface that can make shearing sealing bar 3 contacts with the surface of drilling rod, owing to being typically larger than the radius of the cambered surface of shearing sealing bar 3 by the surface radius of seal drill rod, under the effect of shut-in well power, drilling rod extrusion shearing sealing strip 3, shearing sealing bar 3 is caused to be expanded, the first stage that this process is shear ram preventer shut-in well of the cambered surface expansion of shearing sealing bar 3.
After shearing sealing bar 3 was terminated by the drilling rod extruding expansionary phase, upper shear ram 1 and down cut flashboard 2 are under the take-off lever of hydraulic planger pump promotes, continue to move to center, merge closing well, now, the cambered surface of the sealing surface of shearing sealing bar 3 and planar section are deformed by upper shear ram 1 and the extruding of down cut flashboard 2 simultaneously, until promoting the closing well power of upper shear ram 1 and upper shear ram 2 to reach balance with the resistance moved by the counteracting force of sealing surface, upper shear ram 1 and upper shear ram 2, this process is the second stage of shearing sealing bar shut-in well.
When shear ram preventer closing well, in well, pressure medium can produce boosting power at the back of upper shear ram 1 and down cut flashboard 2, the cambered surface of the sealing surface of shearing sealing bar 3 and the specific contact pressure of plane is made to increase, form the effect helping envelope, this is the phase III, the three phases of above-mentioned shut-in well is carried out continuously, and generally second and third stage completes simultaneously.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a shear ram preventer, including: upper shear ram, down cut flashboard and shearing sealing bar, the knife-edge plane of described upper shear ram is provided with seal groove, described shearing sealing bar is placed in described seal groove, it is characterized in that, between described shearing sealing bar and the bottom of described seal groove, be provided with preset space.
Shear ram preventer the most according to claim 1, it is characterised in that the knife-edge plane both sides of described upper shear ram are provided with two side plates, and said two side plate is equipped with groove.
Shear ram preventer the most according to claim 2, it is characterised in that the both sides of described shearing sealing bar are provided with and the projection of described groove match, described projection is fastened in described groove.
Shear ram preventer the most according to claim 3, it is characterised in that said two side plate is fixing with the flashboard slot of described upper shear ram to be connected.
5. according to the shear ram preventer described in any one of claim 1-4, it is characterised in that the material of described shearing sealing bar is rubber.
Shear ram preventer the most according to claim 4, it is characterised in that the material of described shearing sealing bar is nitrile rubber.
Shear ram preventer the most according to claim 1, it is characterised in that the cutting edge of described down cut flashboard is V-type.
Shear ram preventer the most according to claim 7, it is characterised in that the chamfering of the cutting edge of described down cut flashboard is 15 degree.
Shear ram preventer the most according to claim 1, it is characterised in that described preset space is 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510009471.3A CN105822250A (en) | 2015-01-08 | 2015-01-08 | shear ram blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510009471.3A CN105822250A (en) | 2015-01-08 | 2015-01-08 | shear ram blowout preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105822250A true CN105822250A (en) | 2016-08-03 |
Family
ID=56514037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510009471.3A Pending CN105822250A (en) | 2015-01-08 | 2015-01-08 | shear ram blowout preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105822250A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2522614Y (en) * | 2001-12-14 | 2002-11-27 | 河北华北石油荣盛机械制造有限公司 | Shearing ram of blowout preventer |
| CN2746117Y (en) * | 2004-10-14 | 2005-12-14 | 河北华北石油荣盛机械制造有限公司 | Simple reducing flashboard for well drilling |
| CN2937462Y (en) * | 2006-08-03 | 2007-08-22 | 河北华北石油荣盛机械制造有限公司 | Blow-out preventer of cable cutting hand flashboard for well repair |
| CN201170080Y (en) * | 2008-03-26 | 2008-12-24 | 沧州市德泰克钻井装备有限公司 | Shearing shutter of blowout preventer |
| CN201474651U (en) * | 2009-07-21 | 2010-05-19 | 河北华北石油荣盛机械制造有限公司 | Drill stem cutting flashboard |
| US20120193087A1 (en) * | 2011-02-02 | 2012-08-02 | Hydril Usa Manufacturing Llc | Shear Blade Geometry and Method |
| CN202832355U (en) * | 2012-08-23 | 2013-03-27 | 重庆市衡阳石油设备机械厂 | Shear band blank ram of hydraulic blowout preventer |
-
2015
- 2015-01-08 CN CN201510009471.3A patent/CN105822250A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2522614Y (en) * | 2001-12-14 | 2002-11-27 | 河北华北石油荣盛机械制造有限公司 | Shearing ram of blowout preventer |
| CN2746117Y (en) * | 2004-10-14 | 2005-12-14 | 河北华北石油荣盛机械制造有限公司 | Simple reducing flashboard for well drilling |
| CN2937462Y (en) * | 2006-08-03 | 2007-08-22 | 河北华北石油荣盛机械制造有限公司 | Blow-out preventer of cable cutting hand flashboard for well repair |
| CN201170080Y (en) * | 2008-03-26 | 2008-12-24 | 沧州市德泰克钻井装备有限公司 | Shearing shutter of blowout preventer |
| CN201474651U (en) * | 2009-07-21 | 2010-05-19 | 河北华北石油荣盛机械制造有限公司 | Drill stem cutting flashboard |
| US20120193087A1 (en) * | 2011-02-02 | 2012-08-02 | Hydril Usa Manufacturing Llc | Shear Blade Geometry and Method |
| CN202832355U (en) * | 2012-08-23 | 2013-03-27 | 重庆市衡阳石油设备机械厂 | Shear band blank ram of hydraulic blowout preventer |
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Application publication date: 20160803 |
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