CN203626732U - Mud splashing resisting valve - Google Patents
Mud splashing resisting valve Download PDFInfo
- Publication number
- CN203626732U CN203626732U CN201320870824.5U CN201320870824U CN203626732U CN 203626732 U CN203626732 U CN 203626732U CN 201320870824 U CN201320870824 U CN 201320870824U CN 203626732 U CN203626732 U CN 203626732U
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- Prior art keywords
- valve
- spool
- valve pocket
- mud
- wall
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- 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.)
- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 claims description 27
- 238000007790 scraping Methods 0.000 claims description 11
- 238000005553 drilling Methods 0.000 abstract description 13
- 230000007547 defect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 238000005086 pumping Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to the well drilling field, in particular to a mud splashing resisting valve. The mud splashing resisting valve comprises a valve body, a valve sleeve, a cylindrical valve seat, a valve element and a spring, wherein the valve body is a hollow sleeve, the valve sleeve is a cavity with one end closed and the other open, multiple channels which extend from the closed end of the valve sleeve to the open end of the valve sleeve and then are communicated with the inner cavity of the valve sleeve are formed in the lateral wall of the valve sleeve, the valve sleeve is fixedly arranged on the inner wall of the valve body, the outer wall of the valve sleeve is attached to the inner wall of the valve body, the cylindrical valve seat is fixedly arranged on the inner wall of the valve sleeve, and the outer wall of the cylindrical valve seat is attached to the inner wall of the valve sleeve. After the mud splashing resisting valve is arranged at the bottom end of a square drill rod, the defect that mud leakage can not be effectively prevented due to the fact that a lower plug valve can not be closed tightly is overcome effectively.
Description
Technical field
The utility model relates to drilling well field, in particular to a kind of mud plash proof valve.
Background technology
In oil, natural gas and coal gas drilling process, in the time being drilled into certain drilling depth, after must tripping out kelly bar and making up a joint, then continue to creep into.Owing to retaining a large amount of mud in kelly bar and top water tap thereof, in the moment of dismantling kelly bar, mud can be dumped out from kelly bar lower port, and then brings great inconvenience to operating personnel.Therefore, in correlation technique, in order to prevent that, in the time making up a joint, mud flows out from kelly bar, conventionally can in making up a joint, close the lower plug valve being arranged on kelly bar, treat to open again lower plug valve after single having connect, continue drilling well.
But in correlation technique, closing or open lower plug valve all needs staff's manual operation, owing to closing or opening, the operation easier of lower plug valve is large, therefore often there will be and closes not fastening phenomenon, and then can not effectively prevent that mud from revealing.
Utility model content
The purpose of this utility model is to provide a kind of mud plash proof valve, to solve the above problems.
Mud plash proof valve is provided in embodiment of the present utility model, has comprised valve body, valve pocket, tubular valve seat, spool and spring;
Described valve body is the sleeve of a hollow; Described valve pocket is the sealing of one end, the cavity of other end opening, and on its sidewall, be provided with multiple elder generations and extend to the direction of the opening of described valve pocket from one end of described valve pocket sealing, and then the passage being communicated with the inner chamber of described valve pocket; Described valve pocket is fixedly installed on the inwall of described valve body, and the outer wall of described valve pocket and the inwall of described valve body fit;
Described tubular valve seat is fixedly installed on the inwall of described valve pocket, and the outer wall of described tubular valve seat and the inwall of described valve pocket fit; One end of described tubular valve seat contacts with the opening of described valve pocket, and the other end extends to the opening part of all described passages in described valve sleeving inner wall;
Described spool is an end opening, the cavity of other end sealing; Described spool is arranged in described valve pocket, and on the outer wall of described spool, is provided with the projection that the inwall of a ring outer wall and described valve pocket fits; One end of described spool sealing is connected with the inwall contact of described tubular valve seat;
Described spring is arranged in described valve pocket, and the diapire of its one end and described valve pocket offsets, and the other end is through the opening of described spool and offset with the diapire of described spool.
This mud plash proof valve that the utility model provides, because one end of described tubular valve seat and the opening of described valve pocket contact, the other end extends to the opening part of all described passages in valve sleeving inner wall, spool is arranged in described valve pocket, and on the outer wall of described spool, is provided with the projection that the inwall of a ring outer wall and described valve pocket fits; One end of described spool sealing is connected with the inwall contact of described tubular valve seat; Therefore the projection, arranging on the outer wall of tubular valve seat, spool, spool and the inwall of valve pocket can form a gap communicating with all passages.Like this, in the process of drilling well, valve body is connected on to the bottom of kelly bar away from an end of tubular valve seat; Mud (having higher pressure) in kelly bar flows into the multiple passages that arrange on the outer wall of valve pocket; And in the gap that surrounds of the inwall that is gathered in the projection that arranges on tubular valve seat, spool outer wall, spool and valve pocket; The high-pressure slurry being gathered in this gap can make spool be under pressure, and then spool is moved along the direction of one end of the sealing from tubular valve seat to valve pocket, and by the spring-compressed in valve pocket.Now, one end of spool sealing departs from tubular valve seat and then the mud of assembling is flowed out by the inside of valve body, and then normal operation.
When being drilled into certain drilling depth, and must trip out kelly bar and make up a joint time, because the Pressure Drop of mud is extremely minimum (while tripping out kelly bar, need termination of pumping), now spool return under the effect of the spring in compressive state, move to the direction of tubular valve seat along the one end from valve pocket sealing, thereby the one end that makes spool sealing and tubular valve seat contact and then cut off the runner of mud, by the mud of mud plash proof valve upper end (comprising that kelly bar and the fire hose are first-class) by shutoff in passage.When making up a joint, because passage is blocked; Therefore the mud of mud plash proof valve upper end can not come down in torrents, and then reaches the effect of splashproof.This mud plash proof valve that the utility model is provided is arranged on behind the bottom of kelly bar, and in the process making up a joint, spool is connected with the contact of tubular valve seat under the effect of spring, and then can be by the runner shutoff of mud, without closing or open lower plug valve; Therefore, can effectively improve lower plug valve close not fastening, and then can not effectively prevent mud reveal defect.
Optionally, described spool contacts with described tubular valve seat the position being connected and is the wedge shape cooperatively interacting.
Optionally, multiple the first annular through groove are set on the outer wall of described spool; In all described the first annular through groove, be provided with for by the first joint ring of described valve pocket and described seal spool.
Optionally, on the outer wall of described spool, be also provided with the second annular through groove; Described the second annular through groove is disposed with rubber ring and mud-scraping ring from inside to outside, and described mud-scraping ring protrudes from described the second annular through groove and fits with the inwall of described valve pocket; Described the second annular through groove is greater than the distance of each described the first annular through groove to the opening of described spool to the distance of the opening of described spool.
Optionally, described valve body, described valve pocket, described tubular valve seat, described spool all coaxially arrange.
Optionally, the outer wall of one end of the sealing of described valve pocket is taper.
Optionally, the cross section of described spool is cylindrical; The external diameter of described spring equates with the internal diameter of described spool.
Optionally, multiple the 3rd annular through groove are set on the outer wall of described tubular valve seat; In all described the 3rd annular through groove, be provided with for by the 3rd joint ring of described tubular valve seat and described valve pocket sealing.
Optionally, in the inner chamber of described valve body, comprise internal diameter gradually little first step hole, second step hole and the 3rd stepped hole successively from top to bottom; The openend of described valve pocket is arranged on the interface place in described first step hole and described second step hole; On the sidewall of described valve pocket, be provided with and depart from and move to after the interface of described second step hole and described the 3rd stepped hole when described tubular valve seat and described valve pocket, can be by the spacing described spool alignment pin in described first step hole.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model specific embodiment or technical scheme of the prior art, to the accompanying drawing of required use in the specific embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The front view of the mud plash proof valve that Fig. 1 provides for the utility model embodiment mono-and embodiment bis-;
The cross-sectional view of the spool that Fig. 2 provides for the utility model embodiment bis-;
The mud splashproof valve rubber support ring that Fig. 3 provides for the utility model embodiment bis-and the location diagram of mud-scraping ring.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer; to the technical solution of the utility model be carried out to clear, complete description below; based on the specific embodiment in the utility model; all other embodiments that those of ordinary skills obtain under the prerequisite of not making creative work, all belong to the scope that the utility model is protected.
First, before the narration specific embodiment, in the embodiment providing at the utility model, one end of regulation valve body 101 connection side's drilling rods is upper end, and its other end is lower end.
Embodiment mono-
Please refer to Fig. 1-Fig. 3, the present embodiment provides a kind of mud plash proof valve, comprises valve body 101, valve pocket 102, tubular valve seat 103, spool 104 and spring 105; Valve body 101 is the sleeve of a hollow; Valve pocket 102 is the sealing of one end, the cavity of other end opening, and on its sidewall, be provided with one end that multiple elder generations seal from valve pocket 102 and extend to the direction of the opening of valve pocket 102, and then the path 10 6 being communicated with the inner chamber of valve pocket 102; Valve pocket 102 is fixedly installed on the inwall of valve body 101, and the inwall of the outer wall of valve pocket 102 and valve body 101 fits; Tubular valve seat 103 is fixedly installed on the inwall of valve pocket 102, and the inwall of the outer wall of tubular valve seat 103 and valve pocket 102 fits; One end of tubular valve seat 103 contacts with the opening of valve pocket 102, and the other end extends to the opening part of all path 10s 6 in valve pocket 102 inwalls; Spool 104 is an end opening, the cavity of other end sealing; Spool 104 is arranged in valve pocket 102, and on the outer wall of spool 104, is provided with the projection 107 that the inwall of a ring outer wall and valve pocket 102 fits; One end that spool 104 seals is connected with the inwall contact of tubular valve seat 103; Spring 105 is arranged in valve pocket 102, and the diapire of its one end and valve pocket 102 offsets, and the other end is through the opening of spool 104 and offset with the diapire of spool 104.
This mud plash proof valve that the utility model provides, because one end of tubular valve seat 103 contacts with the opening of valve pocket 102, the other end extends to the opening part of all path 10s 6, and spool 104 is arranged in valve pocket 102, and on the outer wall of spool 104, be provided with the projection 107 that the inwall of a ring outer wall and valve pocket 102 fits; One end that spool 104 seals is connected with the inwall contact of tubular valve seat 103; Therefore the projection 107, arranging on the outer wall of tubular valve seat 103, spool 104, spool 104 and the inwall of valve pocket 102 can form a gap communicating with all path 10s 6.Like this, in the process of drilling well, valve body 101 is connected on to the bottom of kelly bar away from an end of tubular valve seat 103; Mud (having higher pressure) in kelly bar flows into the multiple path 10s 6 that arrange on the outer wall of valve pocket 102; And in the gap that surrounds of the inwall that is gathered on tubular valve seat 103, spool 104 outer walls, spool 104 projection 107 that arranges and valve pocket 102; The high-pressure slurry being gathered in this gap can make spool 104 be under pressure, and then spool 104 is moved along the direction of one end of the sealing from tubular valve seat 103 to valve pocket 102, and the spring in valve pocket 102 105 is compressed.Now, one end that spool 104 seals departs from tubular valve seat 103 and then the mud of assembling is flowed out by the inside of valve body 101, and then normal operation.
When being drilled into certain drilling depth, and must trip out kelly bar and make up a joint time, because the Pressure Drop of mud is extremely minimum (while tripping out kelly bar, need termination of pumping), now spool 104 return under the effect of the spring 105 in compressive state, move to the direction of tubular valve seat 103 along one end of sealing from valve pocket 102, thereby make one end that spool 104 seals and tubular valve seat 103 contact and then cut off the runner of mud, by the mud of mud plash proof valve upper end (comprising that kelly bar and the fire hose are first-class) by shutoff in path 10 6.When making up a joint, because path 10 6 is blocked; Therefore the mud of mud plash proof valve upper end can not come down in torrents, and then reaches the effect of splashproof.This mud plash proof valve that the utility model is provided is arranged on behind the bottom of kelly bar, in the process making up a joint, spool 104 is connected with 103 contacts of tubular valve seat under the effect of spring 105, and then can be by the runner shutoff of mud, without closing or open lower plug valve; Therefore, can effectively improve lower plug valve close not fastening, and then can not effectively prevent mud reveal defect.
For the mud plash proof valve that makes the utility model embodiment mono-is better applied, more effectively be applied in the field of drilling well, the utility model also provides embodiment bis-on the basis of above-described embodiment one, further increase and the restriction of the mud plash proof valve of embodiment bis-to embodiment mono-, now be described in detail and explain, please refer to Fig. 1-Fig. 3:
In the present embodiment, for make between spool 104 and tubular valve seat 103 can be easier under the effect of spring 105 realization contact connect; Preferably, spool 104 contacts with tubular valve seat 103 position being connected and is the wedge shape cooperatively interacting.Spool 104 and tubular valve seat 103 have in the process that the contact site of wedge-type shape can be connected in contact, coordinate tight, and then can be effectively by multiple path 10 6 shutoff.
In addition, in order to make the outer wall of spool 104 and the inwall of valve pocket 102 realize as much as possible intact laminating, increase the effect of its sealing, preferred, multiple the first annular through groove are set on the outer wall of spool 104; In all the first annular through groove, be provided with the first joint ring 201 for valve pocket 102 and spool 104 are sealed; Spool 104 and valve pocket 102 can be sealed by 201 of multiple the first joint rings, make spool 104 in the interior axially-movable of valve pocket 102, mud liquid can not infiltrated in its inside, gap.
In concrete practice process, because may having part, the mud flowing into from path 10 6 is attached between spool 104 and the inwall of valve pocket 102, especially can be attached on the outer wall of spool 104, and then the sealing of spool 104 and valve pocket 102 is caused to bad impact; In the present embodiment, preferred, on the outer wall of spool 104, be also provided with the second annular through groove; The second annular through groove is disposed with rubber ring 207 and mud-scraping ring 202 from inside to outside, and mud-scraping ring 202 protrudes from the second annular through groove and fits with the inwall of valve pocket 102; The second annular through groove is greater than the distance of each the first annular through groove to the opening of spool 104 to the distance of the opening of spool 104.The distance of one end that the first all annular through groove of distance wall of one end of sealing to spool 104 due to the second annular through groove seals to spool 104 is little, so, all wipe off by 202 mud that part can be attached to spool 104 of mud-scraping ring.In addition, owing to being also provided with rubber ring 207 in the second annular through groove, after long-term use, after mud-scraping ring 202 is worn, rubber ring 207 has elasticity, it can be pushed mud-scraping ring 202 as for the inwall of valve pocket 102 and be affixed by deformation, and then realizes and well scrape mud effect.
In addition, when mud plash proof valve is in the process of work, in order to make can to realize more effectively and coordinating between each parts, preferred, valve body 101, valve pocket 102, tubular valve seat 103, spool 104 all coaxially arrange.In addition,, in order to guarantee that mud from falling into valve body 101 tops is smoothly in admission passage 106, optional, the outer wall of one end of the sealing of valve pocket 102 is taper; Like this, mud can flow in multiple path 10s 6 smoothly along the outer wall of taper.Concrete, can be set to triangular prism shape, a path 10 6 is set between each prism.
Mud plash proof valve is in the process of work, 105, spring plays an important role, in order to make spring 105 compressed or recover can not bend in the process of deformation, compressed along the axis of spool 104 as much as possible or stretch out, optionally, the cross section of spool 104 is cylindrical; The external diameter of spring 105 equates with the internal diameter of spool 104; Whole like this spring 105 can be fitted in spool 104 inside, guarantees as much as possible the axial generation deformation of spring 105 along spool 104.
In the present embodiment, for the stability that guarantees to be fixedly connected with between each parts, preferred, valve body 101 can be realized by a screw fixing with valve pocket 102; Tubular valve seat 103 also can be realized by screw relative fixing with valve pocket 102.In addition, in order to make to realize sealing between tubular valve seat 103 and valve pocket 102, optional, multiple the 3rd annular through groove are set on the outer wall of tubular valve seat 103; In all the 3rd annular through groove, be provided with the 3rd joint ring 203 for tubular valve seat 103 and valve pocket 102 are sealed, can be by sealing between tubular valve seat 103 and valve pocket 102 by 203 of the 3rd joint rings.
It may be noted that, in the process of concrete work, after termination of pumping on end pressure shed, now likely there will be the phenomenon of pressing back well head in lower drilling tool, cause mud in drill string upwards to gush out suddenly.Under these circumstances, it is up that lower surface pressure also can promote spool 104, opens runner, make pressure balance on valve body 101, and then be down to reduced levels, now spool 104 is closed under the effect of spring 105, also can prevent mud splash and pollution that bottom pressure return is brought.
In further technical scheme, in order to make mud plash proof valve there is long application life, and can tackle the generation of emergency; Preferably, in the inner chamber of valve body 101, comprise internal diameter gradually little first step hole (not marking in Fig. 1, i.e. the residing space of whole valve pocket), second step hole 204 and the 3rd stepped hole 205 successively from top to bottom; The openend of valve pocket 102 is arranged on the interface place in first step hole and second step hole 204; On the sidewall of valve pocket 102, be provided with and depart from and move to after the interface of second step hole 204 and the 3rd stepped hole 205 when tubular valve seat 103 and valve pocket 102, can be by spacing spool 104 alignment pin 206 in first step hole.
After long-time use, if the multiple joint rings that arrange on spool 104 outer walls and rubber ring 207, mud-scraping ring 202 potted components such as grade all lost efficacy, mud can enter the cavity at spring 105 places, now mud pressure acts on the inner chamber of spool 104, can promote spool 104 descending, compressing valve seat, in the time that pressure is enough large, cut off 208(and please refer to Fig. 1) interrupted, thereby tubular valve seat 103 and valve pocket 102 are departed from, tubular valve seat 103 comes downwards in the second layer stepped hole of valve body 101, and be positioned at the contact surface of second step hole 204 and the 3rd stepped hole 205, descending, 104 of spools can be positioned in first step hole by the effect of alignment pin 206, one end and tubular valve seat 103 that now spool 104 seals are thrown off, the runner of mud is opened again.Control well and cut off 208 the pressure of cutting off, so just can effectively prevent the eight pump phenomenon that causes after multiple seal fails, carry out overload protection, improve the security performance of the mud plash proof valve of the present embodiment.
To sum up, this mud splashproof that the utility model embodiment provides, can close when it makes up a joint automatically, and then places mud and reveal, and when normal drilling well, can automatically open.And made corresponding structure qualification by the seal form between contact surface, each contact surface to spool 104 and tubular valve seat 103 etc., make this novel mud plash proof valve there is the advantages such as functional performance is better, long service life.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. a mud plash proof valve, is characterized in that, comprises valve body, valve pocket, tubular valve seat, spool and spring;
Described valve body is the sleeve of a hollow; Described valve pocket is the sealing of one end, the cavity of other end opening, and on its sidewall, be provided with multiple elder generations and extend to the direction of the opening of described valve pocket from one end of described valve pocket sealing, and then the passage being communicated with the inner chamber of described valve pocket; Described valve pocket is fixedly installed on the inwall of described valve body, and the outer wall of described valve pocket and the inwall of described valve body fit;
Described tubular valve seat is fixedly installed on the inwall of described valve pocket, and the outer wall of described tubular valve seat and the inwall of described valve pocket fit; One end of described tubular valve seat contacts with the opening of described valve pocket, and the other end extends to the opening part of the inwall in described valve pocket of all described passages;
Described spool is an end opening, the cavity of other end sealing; Described spool is arranged in described valve pocket, and on the outer wall of described spool, is provided with the projection that the inwall of a ring outer wall and described valve pocket fits; One end of described spool sealing is connected with the inwall contact of described tubular valve seat;
Described spring is arranged in described valve pocket, and the diapire of its one end and described valve pocket offsets, and the other end is through the opening of described spool and offset with the diapire of described spool.
2. mud plash proof valve according to claim 1, is characterized in that, described spool contacts with described tubular valve seat the position being connected and is the wedge shape cooperatively interacting.
3. mud plash proof valve according to claim 1, is characterized in that, multiple the first annular through groove are set on the outer wall of described spool;
In all described the first annular through groove, be provided with for by the first joint ring of described valve pocket and described seal spool.
4. mud plash proof valve according to claim 3, is characterized in that, is also provided with the second annular through groove on the outer wall of described spool;
Described the second annular through groove is disposed with rubber ring and mud-scraping ring from inside to outside, and described mud-scraping ring protrudes from described the second annular through groove and fits with the inwall of described valve pocket;
Described the second annular through groove is greater than the distance of each described the first annular through groove to the opening of described spool to the distance of the opening of described spool.
5. mud plash proof valve according to claim 1, is characterized in that, described valve body, described valve pocket, described tubular valve seat, described spool all coaxially arrange.
6. according to the mud plash proof valve described in claim 1-5 any one, it is characterized in that, the outer wall of one end of the sealing of described valve pocket is taper.
7. mud plash proof valve according to claim 6, is characterized in that, the cross section of described spool is circular;
The external diameter of described spring equates with the internal diameter of described spool.
8. mud plash proof valve according to claim 7, is characterized in that, multiple the 3rd annular through groove are set on the outer wall of described tubular valve seat;
In all described the 3rd annular through groove, be provided with for by the 3rd joint ring of described tubular valve seat and described valve pocket sealing.
9. mud plash proof valve according to claim 8, is characterized in that, comprises internal diameter gradually little first step hole, second step hole and the 3rd stepped hole successively in the inner chamber of described valve body from top to bottom;
The openend of described valve pocket is arranged on the interface place in described first step hole and described second step hole;
On the sidewall of described valve pocket, be provided with and depart from and move to after the interface of described second step hole and described the 3rd stepped hole when described tubular valve seat and described valve pocket, can be by the spacing described spool alignment pin in described first step hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320870824.5U CN203626732U (en) | 2013-12-27 | 2013-12-27 | Mud splashing resisting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320870824.5U CN203626732U (en) | 2013-12-27 | 2013-12-27 | Mud splashing resisting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203626732U true CN203626732U (en) | 2014-06-04 |
Family
ID=50813221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320870824.5U Expired - Lifetime CN203626732U (en) | 2013-12-27 | 2013-12-27 | Mud splashing resisting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203626732U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905765A (en) * | 2017-12-15 | 2018-04-13 | 扬州诚创石油机械有限公司 | Drive plash proof valve in one kind top |
-
2013
- 2013-12-27 CN CN201320870824.5U patent/CN203626732U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905765A (en) * | 2017-12-15 | 2018-04-13 | 扬州诚创石油机械有限公司 | Drive plash proof valve in one kind top |
| CN107905765B (en) * | 2017-12-15 | 2024-04-05 | 江苏诚创智能装备有限公司 | Top drive splash-proof valve |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190117 Address after: 618300 No. 13, West Zhuhai Road, Guanghan City, Deyang City, Sichuan Province Patentee after: Sichuan Weichuang Petroleum Equipment Manufacturing Co.,Ltd. Address before: 257061 Room 401, Unit 2, Building No. 20, 703 North Second Road, Dongying District, Dongying City, Shandong Province Patentee before: Wang Yue |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |