CN106369220B - A kind of pressure release grease pouring device for ball-and-seat - Google Patents
A kind of pressure release grease pouring device for ball-and-seat Download PDFInfo
- Publication number
- CN106369220B CN106369220B CN201610929068.7A CN201610929068A CN106369220B CN 106369220 B CN106369220 B CN 106369220B CN 201610929068 A CN201610929068 A CN 201610929068A CN 106369220 B CN106369220 B CN 106369220B
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- China
- Prior art keywords
- push rod
- ball
- seat
- pressure release
- greasing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
- F16K39/026—Devices for relieving the pressure on the sealing faces for lift valves using an external auxiliary valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N3/00—Devices for supplying lubricant by manual action
- F16N3/10—Devices for supplying lubricant by manual action delivering grease
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention belongs to ball-and-seat corollary apparatus technical field, discloses a kind of pressure release grease pouring device for ball-and-seat, for solve the problems, such as existing ball-and-seat pressure relief tool and greasing instrument there is security risk.The present invention includes body, gland, push rod, pressure release plug, pressure gauge, greasing instrument and the connector sleeve for being connected with ball-and-seat, the gland and connector sleeve are connected to the top and bottom of body, the push rod is set on body and can be moved up and down on body, the push rod includes epimere push rod, stage casing push rod and hypomere push rod, the hypomere push rod cooperates through the relief hole of connector sleeve and ball-and-seat, there is gap between the stage casing push rod and body, there is gap between the hypomere push rod and connector sleeve；The side of the body is provided with the first connecting portion for installing pressure release plug, the opposite side of the body is provided with the second connecting portion for installing pressure gauge or greasing instrument, and the gap of the first connecting portion and second connecting portion between stage casing push rod and body connects.
Description
Technical field
The invention belongs to ball-and-seat corollary apparatus technical field, and in particular to a kind of pressure release greasing for ball-and-seat fills
Put.
Background technology
Ball-and-seat is widely used on the well head and well control device of petroleum and natural gas exploitation, is well head, well control device examination
Pressure, the indispensable component of greasing.Ball-and-seat belongs to prior art products, in the prior art the technical literature on ball-and-seat
It is more, such as a kind of valve greasing ball-and-seat disclosed in the utility model patent of Application No. 201620353683.3, valve body, valve
Lid, valve deck are equipped with relief hole, and valve inner is equipped with greasing chamber, and greasing intracavitary is equipped with taper seal, taper seal and institute
The conical surface for stating greasing chamber matches, its edge is equipped with and leads fat groove；Taper seal bottom is connected with preloading spring；Greasing chamber front end
Side wall is equipped with internal thread, and adjusting knob connects the greasing chamber side wall, the connection taper of preloading spring one end by the internal thread
Seal bottom, the other end connect the adjusting knob, and adjusting knob is equipped with greasing through hole.
At present, traditional ball-and-seat pressure relief tool is used separately with greasing instrument, on pressure relief tool and greasing work
Tool belongs to technical products, such as the utility model patent of Application No. 201320726587.5 discloses one kind and is exclusively used in production tree
The grease pouring device of greasing, including grease filling machine and greasing ball-and-seat, further include the safe triple valve of greasing, and the safe triple valve of greasing includes
Three-way pipe, three-way pipe are T tube, and three-way pipe includes an import and two outlets, is provided with only in one of outlet
Valve is returned, another outlet is connected with an air gauge, and safety valve, import installation are provided with the junction of air gauge and three-way pipe
Have a taper pipe, the big end of taper pipe is connected to the entrance of three-way pipe, the greasing tube socket of grease filling machine on taper pipe,
Greasing ball-and-seat is connected by pipeline with the safe triple valve of greasing；Check-valves and safety valve are to use valve made of stainless steel
Door.
Since pressure relief tool and greasing instrument are used separately in the prior art, ball-and-seat after needing to pressure release into
, it is necessary to first dismantle pressure relief tool during row greasing, then it greasing instrument is installed could realize grease injection function.There is safety for this mode
Hidden danger, easily causes operating personnel personal injury, in addition after there is pressure release, when reconnecting greasing instrument, ball-and-seat sealing
Failure, causes greasing instrument to be withdrawn from ball-and-seat, causes great security risk.
The content of the invention
The present invention carries to solve the problems, such as the pressure relief tool of existing ball-and-seat and greasing instrument there is security risk
For a kind of pressure release grease pouring device for ball-and-seat, pressure release and grease injection function are integrated with, operating personnel can be helped to judge single current
Valve is residual in pressure size, and pressure relief tool need not be dismantled after pressure release, and greasing instrument is connected i.e. after directly pressure gauge is dismantled
Greasing operation can be carried out, even if the ball-and-seat seal failure after the completion of greasing, greasing instrument can also be withdrawn, is eliminated whole
During existing security risk, protect the personal safety of operating personnel.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of pressure release grease pouring device for ball-and-seat, it is characterised in that blocked up including body, gland, push rod, pressure release
Head, pressure gauge, greasing instrument and the connector sleeve for being connected with ball-and-seat, the gland and connector sleeve are connected to this
The top and bottom of body, the push rod are set on body and can be moved up and down on body, the push rod include epimere push rod,
Stage casing push rod and hypomere push rod, the hypomere push rod cooperate through the relief hole of connector sleeve and ball-and-seat, and the stage casing pushes away
There is gap between bar and body, there is gap between the hypomere push rod and connector sleeve；The side of the body is provided with use
In the first connecting portion of installation pressure release plug, the opposite side of the body be provided with for pressure gauge or greasing instrument are installed the
Two connecting portions, the gap of the first connecting portion and second connecting portion between stage casing push rod and body connect.
The epimere push rod is threadedly coupled with body, and the epimere push rod is through gland and is connected with handle.Handle
Push rod is driven to be moved up and down on body when rotation.
The outside diameter of the stage casing push rod is more than the outside diameter of hypomere push rod.
Gasket is provided between the connector sleeve and body, gasket is provided between the connector sleeve and ball-and-seat.
Airtight and watertight padding layer is filled between the epimere push rod and body.
Gasket is provided between the body and pressure gauge or greasing instrument.
The first connecting portion and second connecting portion are the internal thread being arranged on body, the pressure release plug, pressure gauge
It is threadedly coupled between greasing instrument and body.
The present invention the course of work be：
When ball-and-seat needs pressure release, the pressure cap of ball-and-seat is dismantled, the connector sleeve of the present invention and ball-and-seat are carried out
Connection, unscrews pressure release plug (pressure release plug is connected to first connecting portion), rotating clockwise handle makes push rod down after connecting
The sealed steel ball of ball-and-seat is pushed in movement open, and the fluid (gas) of ball-and-seat sealing is by the gap between push rod and body, then
Pressure release is carried out at pressure release plug, residual pressure size may determine that by pressure gauge (being connected to second connecting portion), until letting out
Pressure is zero；If need not carry out greasing operation after pressure release, rotating handle counterclockwise makes push rod up move, until ball-and-seat
Sealed steel ball reset, tighten pressure release plug, unclamp connector sleeve and be connected with ball-and-seat, remove instrument of the invention, install, tighten
The pressure cap of ball-and-seat, pressure discharge operations terminate.
If also needing to carry out greasing operation after pressure release, after pressure release is zero, rotating handle counterclockwise makes push rod upward
Movement, it is ensured that the sealed steel ball of ball-and-seat resets, and tightens pressure release plug, slowly dismantles pressure gauge, greasing instrument is connected to this
Place's (i.e. second connecting portion of the invention), then rotating clockwise handle makes push rod move downward the sealing steel for pushing ball-and-seat open
Ball, can carry out greasing operation；The pressure gauge reading monitoring greasing situation of greasing instrument is observed at the same time；Treat the pointer of pressure gauge
Greasing is completed when rising to authorized pressure.Rotation handle makes push rod move upwards counterclockwise at this time, until the ball sealer of ball-and-seat
Reset, greasing instrument can be withdrawn, work terminates.
If occurring ball-and-seat seal failure during greasing, rotating clockwise handle moves downward push rod until gasket is close
Envelope, it is of the invention at this time to be used as shut-off valve cut-out pressure source, can be with safe escape greasing instrument.
Compared with prior art, the invention has the advantages that：
The pressure release grease pouring device for ball-and-seat of the present invention, is integrated with pressure release and grease injection function, can help operator
Member judges that ball-and-seat is residual in pressure size, and pressure relief tool need not be dismantled after pressure release, is connected after directly pressure gauge is dismantled
Greasing instrument can carry out greasing operation；Even if the ball-and-seat seal failure after the completion of greasing, greasing instrument can also be withdrawn,
Security risk present in whole process is eliminated, protects the personal safety of operating personnel.
The present invention solves pressure relief tool when traditional pressure relief tool carries out pressure release to ball-and-seat and not yet begins to pressure release in place
Security risk；And integrated handle of the present invention carries out switch control, simplifies operation procedure.
Brief description of the drawings
Fig. 1 is schematic diagram when ball-and-seat uses traditional pressure relief tool pressure release；
Fig. 2 is schematic diagram when ball-and-seat uses traditional greasing instrument greasing；
Fig. 3 is the structure diagram of the present invention (what second connecting portion connected in the schematic diagram is pressure gauge)；
Fig. 4 is the schematic diagram when present invention carries out pressure release；
Fig. 5 is the schematic diagram when present invention carries out greasing；
Marked in figure：1st, handle, 2, airtight and watertight padding layer, 3, gland, 4, pressure release plug, 5, gasket, 6, connector sleeve,
7th, hypomere push rod, 8, pressure gauge, 9, stage casing push rod, 10, body, 11, epimere push rod, 12, ball-and-seat, 13, pressure release valve deck, 14,
Greasing instrument.
Embodiment
With reference to embodiment, the invention will be further described, and described embodiment is only a present invention part
Embodiment, is not whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Other embodiments used obtained under the premise of creative work, belong to protection scope of the present invention.
With reference to attached drawing, the pressure release grease pouring device for ball-and-seat of the invention, including body 10, gland 3, push rod,
Pressure release plug 4, pressure gauge 8, greasing instrument 14 and the connector sleeve 6 for being connected with ball-and-seat 12, the gland 3 and connection
Set 6 is connected to the top and bottom of body 10, and the push rod is set on body 10 and can be moved up and down on body 10,
The push rod includes epimere push rod 11, stage casing push rod 9 and hypomere push rod 7, and the hypomere push rod 7 passes through connector sleeve 6 and ball-and-seat
12 relief hole cooperates, and has gap between the stage casing push rod 9 and body 10, the hypomere push rod 7 and connector sleeve 6 it
Between there is gap；The side of the body 10 is provided with the first connecting portion for installing pressure release plug 4, the body 10 it is another
Side is provided with the second connecting portion for installing pressure gauge 8 or greasing instrument 14, the first connecting portion and second connecting portion
Gap between stage casing push rod 9 and body 10 connects.
The epimere push rod 11 of the present invention is threadedly coupled with body 10, and the epimere push rod 11 is through gland 3 and connects
There is handle 1.Handle 1 in the rotation, drives push rod to be moved up and down on body, so as to drive single current by hypomere push rod 7
The sealed steel ball of valve 12 moves up and down the control for carrying out pressure release and greasing.
The outside diameter of the stage casing push rod of the present invention is more than the outside diameter of hypomere push rod, easy to be lost when the sealed steel ball of ball-and-seat seals
After effect, stage casing push rod moves down the gasket 5 blocked between body 10 and connector sleeve 6, easy to cut-out pressure source, Neng Gouan
Withdraw greasing instrument and other subsequent treatments entirely.
Gasket 5 is provided between the connector sleeve 6 and body 10 of the present invention, is set between the connector sleeve 6 and ball-and-seat 12
Gasket 5 is equipped with, be provided with gasket 5 between the body 10 and pressure gauge 8 or greasing instrument 14 is prevented out by gasket
Situation about now leaking.As a kind of preferable mode of the present invention, gasket 5 selects sealing copper packing.
Leak in order to prevent, airtight and watertight padding layer 2 is filled between the epimere push rod 11 and body 10.
As a kind of preferable mode of the present invention, the first connecting portion and second connecting portion are to be arranged on body 10
Internal thread, is threadedly coupled, wherein connector sleeve and body between the pressure release plug 4, pressure gauge 8 and greasing instrument 14 and body 10
Between, it can also be connected through a screw thread between connector sleeve and ball-and-seat.
The present invention the course of work be：When ball-and-seat 12 needs pressure release, the pressure cap of ball-and-seat 12 is dismantled, this is sent out
Bright connector sleeve 6 is attached with ball-and-seat 12, and pressure release plug 4 is unscrewed after connecting, and (pressure release plug is connected to the first connection
Portion), rotating clockwise handle 1 makes push rod down move the sealed steel ball for pushing ball-and-seat 12 open, the fluid (gas that ball-and-seat 12 seals
Body) by the gap between push rod and body 10, pressure release is then carried out at pressure release plug 4, (the is connected to by pressure gauge 8
Two connecting portions) it may determine that residual pressure size, until pressure release is zero；It is inverse if greasing operation need not be carried out after pressure release
Hour hands rotation handle 1 makes push rod up move, until the sealed steel ball of ball-and-seat 12 resets, tightens pressure release plug 4, unclamps connection
The connection of set 6 and ball-and-seat 12, removes the instrument of the present invention, installs, tightens the pressure cap of ball-and-seat 12, and pressure discharge operations terminate.
If also needing to carry out greasing operation after pressure release, after pressure release is zero, rotating handle 1 counterclockwise makes push rod upward
Movement, it is ensured that the sealed steel ball of ball-and-seat 12 resets, and tightens pressure release plug 4, slowly dismantles pressure gauge 8, greasing instrument 14 is connected
(i.e. of the invention second connecting portion) is connected at this, handle 1 is then rotated clockwise and moves downward push rod and push ball-and-seat 12 open
Sealed steel ball, greasing operation can be carried out；The pressure gauge reading monitoring greasing situation of greasing instrument is observed at the same time；Treat pressure
Greasing is completed when the pointer of table rises to authorized pressure.Rotation handle 1 makes push rod move upwards counterclockwise at this time, until ball-and-seat
12 ball sealer resets, and can withdraw greasing instrument, work terminates.
If occurring 12 seal failure of ball-and-seat during greasing, rotating clockwise handle 1 moves downward push rod until stage casing
Push rod 9 is sealed with the gasket 5 between body and connector sleeve 6, and the present invention is used as shut-off valve cut-out pressure source, Ke Yian at this time
Withdraw greasing instrument entirely, while pressure release plug also provides facility for subsequent treatment, solve traditional greasing instrument again greasing when it is single
After flowing valve seal failure, it is impossible to the problem withdrawn.
The pressure release grease pouring device for ball-and-seat of the present invention, is integrated with pressure release and grease injection function, can help operator
Member judges that ball-and-seat is residual in pressure size, and pressure relief tool need not be dismantled after pressure release, is connected after directly pressure gauge is dismantled
Greasing instrument can carry out greasing operation；Even if the ball-and-seat seal failure after the completion of greasing, greasing instrument can also be withdrawn,
Security risk present in whole process is eliminated, protects the personal safety of operating personnel.
Pressure release is begun to when finishing the invention avoids the not yet threaded connection of the push rod and body of traditional pressure relief tool to lead
Cause pressure release valve deck 13 to fly out to hurt sb.'s feelings, while avoid traditional pressure relief tool and torn open due to being unable to the erroneous judgement of accurate judgement residual pressure size
Ball-and-seat 12 is unloaded, causes to unscrew the problem of ball-and-seat flies to hurt sb.'s feelings by residual pressure punching.
Embodiment one
The pressure release grease pouring device for ball-and-seat of the present embodiment, including body, gland, push rod, pressure release plug, pressure
Power table, greasing instrument and the connector sleeve for being connected with ball-and-seat, the gland and connector sleeve are connected to body
Top and bottom, the push rod are set on body and can be moved up and down on body, and the push rod includes epimere push rod, stage casing
Push rod and hypomere push rod, the relief hole of the hypomere push rod through connector sleeve and ball-and-seat cooperate, the stage casing push rod with
There is gap between body, there is gap between the hypomere push rod and connector sleeve；The side of the body is provided with for pacifying
The first connecting portion of pressure release plug is filled, the opposite side of the body is provided with the second company for installing pressure gauge or greasing instrument
Socket part, the gap of the first connecting portion and second connecting portion between stage casing push rod and body connect.
Embodiment two
The pressure release grease pouring device for ball-and-seat of the present embodiment, including body, gland, push rod, pressure release plug, pressure
Power table, greasing instrument and the connector sleeve for being connected with ball-and-seat, the gland and connector sleeve are connected to body
Top and bottom, the push rod are set on body and can be moved up and down on body, and the push rod includes epimere push rod, stage casing
Push rod and hypomere push rod, the relief hole of the hypomere push rod through connector sleeve and ball-and-seat cooperate, the stage casing push rod with
There is gap between body, there is gap between the hypomere push rod and connector sleeve；The side of the body is provided with for pacifying
The first connecting portion of pressure release plug is filled, the opposite side of the body is provided with the second company for installing pressure gauge or greasing instrument
Socket part, the gap of the first connecting portion and second connecting portion between stage casing push rod and body connect；The epimere push rod
It is threadedly coupled with body, the epimere push rod is through gland and is connected with handle.Push rod is driven to exist when handle rotates
Moved up and down on body.
Embodiment three
The pressure release grease pouring device for ball-and-seat of the present embodiment, including body, gland, push rod, pressure release plug, pressure
Power table, greasing instrument and the connector sleeve for being connected with ball-and-seat, the gland and connector sleeve are connected to body
Top and bottom, the push rod are set on body and can be moved up and down on body, and the push rod includes epimere push rod, stage casing
Push rod and hypomere push rod, the relief hole of the hypomere push rod through connector sleeve and ball-and-seat cooperate, the stage casing push rod with
There is gap between body, there is gap between the hypomere push rod and connector sleeve；The side of the body is provided with for pacifying
The first connecting portion of pressure release plug is filled, the opposite side of the body is provided with the second company for installing pressure gauge or greasing instrument
Socket part, the gap of the first connecting portion and second connecting portion between stage casing push rod and body connect；The epimere push rod
It is threadedly coupled with body, the epimere push rod is through gland and is connected with handle.Push rod is driven to exist when handle rotates
Moved up and down on body；The outside diameter of the stage casing push rod is more than the outside diameter of hypomere push rod.
Example IV
On the basis of any of the above-described embodiment, gasket, the connection are provided between the connector sleeve and body
Gasket is provided between set and ball-and-seat.
Embodiment five
On the basis of any of the above-described embodiment, airtight and watertight padding layer is filled between the epimere push rod and body.
Embodiment six
On the basis of any of the above-described embodiment, sealing is provided between the body and pressure gauge or greasing instrument
Pad.
Embodiment seven
On the basis of any of the above-described embodiment, the first connecting portion and second connecting portion are to be arranged on body
Internal thread, is threadedly coupled between the pressure release plug, pressure gauge and greasing instrument and body.
Claims (7)
1. a kind of pressure release grease pouring device for ball-and-seat, including body (10) and push rod, the push rod are set in body (10)
It can move up and down above and on body, it is characterised in that further include gland (3), pressure release plug (4), pressure gauge (8), note
Fat instrument (14) and the connector sleeve for being connected with ball-and-seat (6), the gland (3) and connector sleeve (6) are connected to
The top and bottom of body (10), the push rod includes epimere push rod (11), stage casing push rod (9) and hypomere push rod (7), under described
Section push rod (7) cooperates through connector sleeve (6) and the relief hole of ball-and-seat (12), the stage casing push rod (9) and body (10)
Between there is gap, there is gap between the hypomere push rod (7) and connector sleeve (6)；The side of the body (10) is provided with
For installing the first connecting portion of pressure release plug (4), the opposite side of the body (10) be provided with for install pressure gauge (8) or
The second connecting portion of greasing instrument (14), the first connecting portion and second connecting portion with stage casing push rod (9) and body (10)
Between gap connection.
2. the pressure release grease pouring device according to claim 1 for ball-and-seat, it is characterised in that the epimere push rod (11)
It is threadedly coupled with body (10), the epimere push rod (11) is through gland (3) and is connected with handle (1).
3. the pressure release grease pouring device according to claim 1 for ball-and-seat, it is characterised in that the stage casing push rod (9)
Outside diameter be more than hypomere push rod (7) outside diameter.
4. the pressure release grease pouring device according to claim 1 for ball-and-seat, it is characterised in that the connector sleeve (6) with
Gasket (5) is provided between body (10), gasket (5) is provided between the connector sleeve (6) and ball-and-seat (12).
5. the pressure release grease pouring device according to claim 1 for ball-and-seat, it is characterised in that the epimere push rod (11)
Airtight and watertight padding layer (2) is filled between body (10).
6. the pressure release grease pouring device according to claim 1 for ball-and-seat, it is characterised in that the body (10) and pressure
Gasket (5) is provided between power table (8) or the body and greasing instrument (14).
7. according to any pressure release grease pouring devices for ball-and-seat of claim 1-6, it is characterised in that described first connects
Socket part and second connecting portion are the internal thread being arranged on body (10), the pressure release plug (4), pressure gauge (8) and greasing work
Tool (14) is threadedly coupled between body (10) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610929068.7A CN106369220B (en) | 2016-10-31 | 2016-10-31 | A kind of pressure release grease pouring device for ball-and-seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610929068.7A CN106369220B (en) | 2016-10-31 | 2016-10-31 | A kind of pressure release grease pouring device for ball-and-seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106369220A CN106369220A (en) | 2017-02-01 |
| CN106369220B true CN106369220B (en) | 2018-05-11 |
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ID=57896003
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610929068.7A Active CN106369220B (en) | 2016-10-31 | 2016-10-31 | A kind of pressure release grease pouring device for ball-and-seat |
Country Status (1)
| Country | Link |
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| CN (1) | CN106369220B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191227004A (en) * | 1912-11-23 | 1913-07-31 | Charles Cheers Wakefield | Improvements in or relating to Valves for Lubricators. |
| CN201359186Y (en) * | 2009-02-15 | 2009-12-09 | 成都市锐奇机电设备有限公司 | Fat injection valve |
| CN202613017U (en) * | 2012-06-25 | 2012-12-19 | 方圆阀门集团丽水有限公司 | Grease injection valve |
| CN203560730U (en) * | 2013-11-18 | 2014-04-23 | 中国石油化工股份有限公司 | Grease filling device special for filling grease into Christmas tree |
| CN203769717U (en) * | 2014-03-31 | 2014-08-13 | 江苏鸿飞机械有限公司 | Universal pressure relief device for sealing grease injection valves |
| CN204224165U (en) * | 2014-10-27 | 2015-03-25 | 浙江鑫爱达机械有限公司 | Discharging gear is stablized in the simple and easy pressure regulation of hydraulic efficiency pressure system oil return |
| CN205560238U (en) * | 2016-04-26 | 2016-09-07 | 汪国良 | Fat single current valve is annotated to valve |
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2016
- 2016-10-31 CN CN201610929068.7A patent/CN106369220B/en active Active
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| CN106369220A (en) | 2017-02-01 |
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Effective date of registration: 20200507 Address after: 618300 No. 86, South Second Section of Zhongshan Avenue, Guanghan City, Deyang City, Sichuan Province Patentee after: SICHUAN BAOSHI MACHINERY DRILLING AND PRODUCTION EQUIPMENT Co.,Ltd. Address before: 618399, No. two, section 66, South Zhongshan Road, Guanghan, Sichuan, Deyang Patentee before: GUANGHAN DRILLING EQUIPMENT FACTORY, BAOJI OILFIELD MACHINERY Co.,Ltd. |