CN203770741U - Five-plate flow guide one-way valve with vertical welding joint - Google Patents
Five-plate flow guide one-way valve with vertical welding joint Download PDFInfo
- Publication number
- CN203770741U CN203770741U CN201420196974.7U CN201420196974U CN203770741U CN 203770741 U CN203770741 U CN 203770741U CN 201420196974 U CN201420196974 U CN 201420196974U CN 203770741 U CN203770741 U CN 203770741U
- Authority
- CN
- China
- Prior art keywords
- spool
- cylindrical
- hole
- valve
- valve rod
- 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.)
- Expired - Fee Related
Links
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
The utility model relates to a valve special for an offshore oil drilling platform, namely a five-plate flow guide one-way valve with a vertical welding joint. The five-plate flow guide one-way valve comprises a welding joint valve body, an upper flow guide body, a lower flow guide body, an upper half valve element and a lower half valve element, wherein the an outer barrel outer thread and an outer barrel inner thread between the upper half valve element and the lower half valve element are in airtight fit, and a lower inner barrel outer circle and an upper inner barrel inner circle are in airtight fit to form an airtight annular cavity. Due to the cavity structure, the overall specific gravity of the combination of the upper half valve element and the lower half valve element are between the specific gravity of seawater and the specific gravity of oil, and the combination can move along the flow direction of a medium, and the one-way valve does not need to additionally consume any energy in the whole working process; a valve rod inner screw hole of the upper flow guide body and a valve rod outer bolt of the low flow guide body are connected with a screw in a fastening mode, and the structure is compact; a circumferential weld at the joint of the exterior of a welding head valve and a system inlet/outlet pipeline by using an external screw joint is firm and reliable, and the interior of the welding head valve is provided with no intermediate object capable of producing large resistance loss, such as a spring.
Description
Technical field
The utility model relates to a kind of offshore drilling platforms special valve, relates in particular to a kind of vertical welding joint five plate water conservancy diversion one-way valves without any obstruction parts such as springs.
Background technique
Continue nineteen twenty Venezuela utilizes wooden platform drilling well in lake, Maracaibo, has found after an elephant, and nineteen twenty-two, the former Soviet Union carried out offshore drilling success with trestle near oil field, the Caspian Sea Baku.After 1936, the U.S. starts to bore first deep-well at the sea in the Gulf of Mexico again, within 1938, builds up in the world marine oil field the earliest.40～sixties of 20th century, along with the development of welding technique and Iron And Steel Industry, the drilling rigs such as steel fixed platform, bottom-supported platform, jack-up unit are in succession there is, the marine site that makes offshore oil and gas exploitation expand 30 meters of depth of waters to., having there is mobile ocean drilling rig in nineteen fifty, has greatly improved drilling efficiency.Nineteen fifty-one, Saudi Arabia has found the offshore oilfield of maximum in the world.After the sixties in 20th century, along with the development of electronic computer technology and shipbuilding, mechanical industry, build up various large complicated offshore drillings, collection, the defeated facility of storage, promoted developing rapidly of offshore oil and gas exploitation.There are in the world at present nearly thousand offshore drilling platformses, each ocean all over the world.The Gulf of Mexico is the most active greater coasting area of drilling well in the world, at present operation just have more than a 19000 mouthful of well, thing followed offshore field accident also occurs again and again.
As everyone knows, the expense of the each maintenance of offshore drilling platforms system is all surprising, and seawater self contains various corrosivity mixtures, and offshore drilling platforms in use, in crude oil, contain various corrosivity mixtures, oil field in recovery process, moisture and other Korrosionsmediums all in general oil well liquid-producing, the water in crude oil, along with crude oil is vaporized in heating process, increase the gas phase load of pipeline, caused atmospheric and vacuum distillation unit operation fluctuation, when serious, can cause the tower accident of rushing.MgC12 in crude oil and CaC12 can be hydrolyzed to produce has corrosive HCl, and HCl formation hydrochloric acid soluble in water, has very strong corrosive action, causes the corrosion of delivery pipeline system.Crude oil is outwards carried through oil transport pipeline from oil well produced, and the block clearing cost after any oil circuit maintenance or replacing and line clogging is higher, and affects for a long time oil well production.
Any component in offshore drilling platforms system are all wanted to stand seawater corrosion, in offshore drilling platforms system pipeline, the essential one-way valve of all will using completes whole course of conveying, the one-way valve using at present, picture: steel ball type, valve type and gravity type, the major defect of existence is: inside causes owing to being provided with spring the drag losses that generation is larger.Particularly in torrent pipeline, use, impact generation bias voltage or malfunctioning once damping spring can not bear torrent, just likely cause unpredictalbe accident to occur.
No matter be offshore field or land oil well, the prominent features of well-known slide beam oil rig is intermittence acting, is therefore the sensitivity of one-way valve and the Pinch technology that always becomes this device working life on supporting pipeline with it.
In previous International Patent Application PCT/AU02/00861, described a kind of one-way valve, it transmits malleation, in case backflow.In this control valve unit, a sliding spool is provided, it is connected with bias voltage fin/diaphragm (web), and the movement of this plunger stretches this fin or shrinks.This fin forms a part for a variable volume chamber, to keep malleation.This valve and being for a shortcoming of other one-way valves of great majority of medical domain, this valve is usually included in the sliding spool sliding between open position and closed position.This sliding spool is biased time closed position conventionally, causes leaking.
China's number of patent application: 90108376.3 one-way valves and application number: the sequence fluid one way valve of 91102122.1 low controlling-pressures etc. all exists whole process will overcome Returnning spring resistance.The matching used one-way valves of institute such as self-priming pump also all exist whole process will overcome gravitational resistance, cause additionally increasing energy consumption.
Summary of the invention
It is solid and reliable by the circular weld of outer screw joint and system turnover pipeline connection that the purpose of this utility model is to provide a kind of soldered splice valve body outside, and valve inner without any obstruction parts such as springs, is particularly suitable for using in mucus or torrent pipeline; Thoroughly avoid impacting generation bias voltage or malfunctioning caused chance failure because damping spring can not bear torrent; And between first spool and second spool assemblying body, form ring cavity structure, make overall proportion between sea water specific gravity and oil proportion, can move along with media flow direction, work is omnidistance without the extra one-way valve that consumes any energy consumption.Adopt following technology:
A kind of vertical welding joint five plate water conservancy diversion one-way valves, comprise soldered splice valve body, upper deflector, lower deflector, first spool and second spool, there is valve body bevel for welding at the two ends up and down of described soldered splice valve body cylindrical, the interior round tube hole of described soldered splice valve body top bar respectively up and down hole and the hole of getting out of a predicament or an embarrassing situation; Described upper deflector planar ends is being fixedly connected with and is going up cylindrical body, upper cylindrical body below transition is dwindled and is connected with runner round bar, runner round bar transition amplification is connected with cylinder valve rod, there is valve rod inner bolt hole cylinder valve rod lower end surface, and described upper cylindrical body excircle dimension is identical with described cylinder valve rod excircle dimension; On described upper deflector exterior arc surface, there are upper five plates in location, locate upper five plate outer rims and coordinate with the described interporal lacuna of topping bar; Described lower deflector planar ends has the outer double-screw bolt of valve rod to be connected with described valve rod inner bolt hole screw-tightened, on described lower deflector exterior arc surface, there are lower five plates in location, the lower five plate outer rims in location coordinate with the described interporal lacuna of getting out of a predicament or an embarrassing situation, as improvement: have between the upper taper cone barrel of first described spool and upper cone to connect muscle on three leaves and be connected, described upper taper cone barrel outer rim is connected with urceolus internal thread, described upper taper cone barrel inner edge is connected with inner core inner circle, on the spool on described upper cone between inner circle and described upper cylindrical body cylindrical for being slidably matched; Between the lower taper cone barrel of second described spool and lower cone, have and under three leaves, connect muscle and be connected, described lower taper cone barrel outer rim is connected with urceolus outside thread and described airtight the matching of urceolus internal thread, and described lower taper cone barrel inner edge is connected with lower inner core cylindrical and described airtight the matching of upper inner core inner circle; Under spool in spool in described lower inner core inner circle on inner circle and described lower cone inner circle measure-alike and all and between described cylinder valve rod cylindrical for being slidably matched; First described spool cylindrical equate with second described spool cylindrical and all and between described interior round tube hole for being slidably matched; On described location, under five plates and described location, single leaf thickness of five plates is 5 to 6 millimeters.
As further improvement: described urceolus internal thread 62 and the nominal diameter of urceolus outside thread 72 are all 180 to 182 millimeters.
As further improvement: the nominal diameter of described upper inner core 63 inner circles and described lower inner core 73 cylindricals is all 125 to 127 millimeters.
As further improvement: the cylindrical nominal diameter of described valve body bevel for welding 55 is 225 to 227 millimeters.
As further improvement: described interior round tube hole 57 diameters are 190 to 192 millimeters.
As further improvement: described diameter of topping bar hole 53 and the described hole 58 of getting out of a predicament or an embarrassing situation is 205 to 207 millimeters.
The utility model has the advantages that:
1. the urceolus outside thread between first spool and second spool matches with urceolus internal thread is airtight, and lower inner core cylindrical and airtight the matching of upper inner core inner circle, form airtight ring cavity, adopt cavity structure to make the overall proportion of first spool and second spool assemblying body between sea water specific gravity and oil proportion, can move along with media flow direction, work is omnidistance without the extra one-way valve that consumes any energy consumption;
2. go up the outer double-screw bolt (89) of the valve rod inner bolt hole of deflector and the valve rod of lower deflector and be connected with described screw-tightened, compact structure;
3. the utility model soldered splice valve body outside is solid and reliable by the circular weld of outer screw joint and system turnover pipeline connection, soldered splice valve inner may produce the central object of larger drag losses without spring etc., be particularly suitable for using in mucus or torrent pipeline; Thoroughly avoided impacting generation bias voltage or malfunctioning caused chance failure because damping spring can not bear torrent, extended to a great extent working life, direct benefit and indirect benefit are all very objective.
Brief description of the drawings
Figure l is the sectional drawing forward circulation status that the utility model is crossed shaft axis.
Fig. 2 be in figure l the utility model in reverse blocking state.
Fig. 3 is the sectional axonometric drawing of first spool 60 and second spool 70 assemblying bodys in Fig. 1.
Fig. 4 is the sectional drawing of first spool 60 and second spool 70 assemblying bodys in Fig. 1.
Fig. 5 is A-A sectional view in Fig. 1.
Fig. 6 is B-B sectional view in Fig. 1.
Fig. 7 is C-C sectional view in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is described in further detail:
In figure l, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, a kind of vertical welding joint five plate water conservancy diversion one-way valves, comprise soldered splice valve body 50, upper deflector 30, lower deflector 80, first spool 60 and second spool 70, there is valve body bevel for welding 55 at the two ends up and down of described soldered splice valve body 50 cylindricals, the interior round tube hole 57 of described soldered splice valve body 50 top bar respectively up and down hole 53 and the hole 58 of getting out of a predicament or an embarrassing situation, described upper deflector 30 planar ends are being fixedly connected with and are going up cylindrical body 32, upper cylindrical body 32 below transition are dwindled and are connected with runner round bar 34, the 34 transition amplifications of runner round bar are connected with cylinder valve rod 31, there is valve rod inner bolt hole 39 cylinder valve rod 31 lower end surfaces, and described upper cylindrical body 32 excircle dimensions are identical with described cylinder valve rod 31 excircle dimensions, on described upper deflector 30 exterior arc surfaces, there are upper five plates 35 in location, locate upper five plate 35 outer rims and described hole 53 Spielpassung of topping bar, described lower deflector 80 planar ends have the outer double-screw bolt 89 of valve rod to be connected with described valve rod inner bolt hole 39 screw-tightened, on described lower deflector 80 exterior arc surfaces, there are lower five plates 85 in location, lower five plate 85 outer rims in location and described hole 58 Spielpassung of getting out of a predicament or an embarrassing situation, as improvement: have between the upper taper cone barrel 69 of first described spool 60 and upper cone 68 to connect muscle 61 on three leaves and be connected, described upper taper cone barrel 69 outer rims are connected with urceolus internal thread 62, described upper taper cone barrel 69 inner edges are connected with inner core 63 inner circles, on spool on described upper cone 68 between inner circle 64 and described upper cylindrical body 32 cylindricals for being slidably matched, between the lower taper cone barrel 79 of second described spool 70 and lower cone 78, have and under three leaves, connect muscle 71 and be connected, described lower taper cone barrel 79 outer rims are connected with urceolus outside thread 72 and described airtight the matching of urceolus internal thread 62, and described lower taper cone barrel 79 inner edges are connected with lower inner core 73 cylindricals and described airtight the matching of upper inner core 63 inner circles, under spool in spool in described lower inner core 73 inner circles on inner circle 75 and described lower cone 78 inner circle 74 measure-alike and all and between described cylinder valve rod 31 cylindricals for being slidably matched, first described spool 60 cylindricals equate with second described spool 70 cylindricals and all and between described interior round tube hole 57 for being slidably matched, on described location, under five plates 35 and described location, single leaf thickness of five plates 85 is 5 to 6 millimeters.
As further improvement: described urceolus internal thread 62 and the nominal diameter of urceolus outside thread 72 are all 180 to 182 millimeters.
As further improvement: the nominal diameter of described upper inner core 63 inner circles and described lower inner core 73 cylindricals is all 125 to 127 millimeters.
As further improvement: the cylindrical nominal diameter of described valve body bevel for welding 55 is 225 to 227 millimeters.
As further improvement: described interior round tube hole 57 diameters are 190 to 192 millimeters.
As further improvement: described diameter of topping bar hole 53 and the described hole 58 of getting out of a predicament or an embarrassing situation is 205 to 207 millimeters.
In embodiment:
The nominal diameter of urceolus internal thread 62 and urceolus outside thread 72 is all 181 millimeters, the nominal diameter of upper inner core 63 inner circles and lower inner core 73 cylindricals is all 126 millimeters, the cylindrical nominal diameter of valve body bevel for welding 55 is 226 millimeters, interior round tube hole 57 diameters are 191 millimeters, and the diameter in top bar hole 53 and the hole 58 of getting out of a predicament or an embarrassing situation is 206 millimeters.
The outer diameter of a circle of runner round bar 34 is 34 millimeters, and upper cylindrical body 32 cylindricals and the outer diameter of a circle of cylinder valve rod 31 are all 110 millimeters.
Main body assembling process:
1. second spool 70 is assembled with first spool 60.
On urceolus internal thread 62 and urceolus outside thread 72, all coat epoxy resin sealant, on the matching surface of upper inner core 63 inner circles and lower inner core 73 cylindricals, all coat epoxy resin sealant.
By first spool 60 upper inner core 63 inner circles aim at lower inner core 73 cylindricals of second spool 70, then by first spool 60 urceolus internal thread 62 rotate and coordinate with the urceolus outside thread 72 of second spool 70, formed airtight ring cavity 66.
2. overall package.
The first step: five plates 35 on the location of upper deflector 30 are placed on to topping bar in hole 53 of soldered splice valve body 50, then inner circle 74 under inner circle 75 and spool in inner circle 64 and spool on the spool of assembling in second spool 70 of all-in-one-piece and first spool 60 is slidably matched successively and is inserted in barrel valve bar 31.
Second step: five plates 85 under the location of lower deflector 80 are placed on to getting out of a predicament or an embarrassing situation in hole 58 of soldered splice valve body 50, the lower deflector 80 of rotation orders about the outer double-screw bolt 89 of valve rod and is rotatably connected with valve rod inner bolt hole 39, lower five plates 85 in location and upper five plates 35 in location is fixed on respectively get out of a predicament or an embarrassing situation hole 58 and tops bar on hole 53.
Pipeline connects:
There is valve body bevel for welding 55 to connect with system in-line 42 and the fuel-displaced pipeline 41 of system respectively at the two ends up and down of soldered splice valve body 50 cylindricals, form respectively firmly oil-feed circular weld 46 and fuel-displaced circular weld 44.
Using process:
The utility model entirety is vertical places, and the weight that is every 1 mm cube with first spool 60 of ring cavity 66 and the overall proportion of second spool 70 assemblying bodys is 1 gram.When the utility model is static in stopping state.
In Fig. 1, while flowing from bottom to top from the crude oil of system in-line, promote to move on first spool 60 and second spool 70 assemblying bodys, crude stream is through locating down five plates 85 runner of living in, enter into have between the lower taper cone barrel 79 of second spool 70 and lower cone 78 and under three leaves, connect muscle 71 runner of living in, the passage between inner circle 75 in runner round bar 34 cylindricals and spool of flowing through again, enter into and on three leaves, connect muscle 61 runner of living in, flow through again after upper five plate 35 in location runner of living in, flow out and enter into the fuel-displaced pipeline of system.
In Fig. 2, from the crude oil of the fuel-displaced pipeline of system because fortuitous event is from top to bottom when adverse current, promote first spool 60 and second spool 70 assemblying bodys and move down, in spool, inner circle 75 is slidably matched with cylinder valve rod 31 cylindrical precisions, and the runner between lower five plates 85 in location and upper five plates 35 in location is cut off closes.Top-down crude oil passes through upper five plate 35 in location runner of living in, enter into again after connecting muscle 61 runner of living on three leaves and be cut off, effectively stop adverse current to avoid contingency generation, and work whole process just can realize one-way valve effect without additionally consuming any energy consumption again.
Claims (6)
1. vertical welding joint five plate water conservancy diversion one-way valves, comprise soldered splice valve body (50), upper deflector (30), lower deflector (80), first spool (60) and second spool (70), there is valve body bevel for welding (55) at the two ends up and down of described soldered splice valve body (50) cylindrical, the interior round tube hole (57) of described soldered splice valve body (50) top bar respectively up and down hole (53) and the hole of getting out of a predicament or an embarrassing situation (58), described upper deflector (30) planar ends is being fixedly connected with and is going up cylindrical body (32), upper cylindrical body (32) below transition is dwindled and is connected with runner round bar (34), runner round bar (34) transition amplification is connected with cylinder valve rod (31), there is valve rod inner bolt hole (39) cylinder valve rod (31) lower end surface, and described upper cylindrical body (32) excircle dimension is identical with described cylinder valve rod (31) excircle dimension, on described upper deflector (30) exterior arc surface, there are upper five plates in location (35), locate between upper five plates (35) outer rim and the described hole of topping bar (53) as being slidably matched, described lower deflector (80) planar ends has the outer double-screw bolt (89) of valve rod to be connected with described valve rod inner bolt hole (39) screw-tightened, on described lower deflector (80) exterior arc surface, there are lower five plates (85) in location, between lower five plates (85) outer rim in location and the described hole of getting out of a predicament or an embarrassing situation (58) for being slidably matched, it is characterized in that: between the upper taper cone barrel (69) of described first spool (60) and upper cone (68), have on three leaves, to connect muscle (61) and be connected, described upper taper cone barrel (69) outer rim is connected with urceolus internal thread (62), described upper taper cone barrel (69) inner edge is connected with inner core (63) inner circle, on spool on described upper cone (68) between inner circle (64) and described upper cylindrical body (32) cylindrical for being slidably matched, between the lower taper cone barrel (79) of described second spool (70) and lower cone (78), have and under three leaves, connect muscle (71) and be connected, described lower taper cone barrel (79) outer rim is connected with urceolus outside thread (72) and described airtight the matching of urceolus internal thread (62), and described lower taper cone barrel (79) inner edge is connected with lower inner core (73) cylindrical and described airtight the matching of upper inner core (63) inner circle, under spool in spool in described lower inner core (73) inner circle on inner circle (75) and described lower cone (78) inner circle (74) measure-alike and all and between described cylinder valve rod (31) cylindrical for being slidably matched, described first spool (60) cylindrical equate with described second spool (70) cylindrical and all and between described interior round tube hole (57) for being slidably matched, on described location, under five plates (35) and described location, single leaf thickness of five plates (85) is 5 to 6 millimeters.
2. a kind of vertical welding joint five plate water conservancy diversion one-way valves according to claim 1, is characterized in that: described urceolus internal thread (62) and the nominal diameter of urceolus outside thread (72) are all 180 to 182 millimeters.
3. a kind of vertical welding joint five plate water conservancy diversion one-way valves according to claim 1, is characterized in that: the nominal diameter of described upper inner core (63) inner circle and described lower inner core (73) cylindrical is all 125 to 127 millimeters.
4. a kind of vertical welding joint five plate water conservancy diversion one-way valves according to claim 1, is characterized in that: the cylindrical nominal diameter of described valve body bevel for welding (55) is 225 to 227 millimeters.
5. a kind of vertical welding joint five plate water conservancy diversion one-way valves according to claim 1, is characterized in that: described interior round tube hole (57) diameter is 190 to 192 millimeters.
6. a kind of vertical welding joint five plate water conservancy diversion one-way valves according to claim 1, is characterized in that: the diameter in the described hole of topping bar (53) and the described hole of getting out of a predicament or an embarrassing situation (58) is 205 to 207 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420196974.7U CN203770741U (en) | 2014-04-22 | 2014-04-22 | Five-plate flow guide one-way valve with vertical welding joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420196974.7U CN203770741U (en) | 2014-04-22 | 2014-04-22 | Five-plate flow guide one-way valve with vertical welding joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770741U true CN203770741U (en) | 2014-08-13 |
Family
ID=51287932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420196974.7U Expired - Fee Related CN203770741U (en) | 2014-04-22 | 2014-04-22 | Five-plate flow guide one-way valve with vertical welding joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770741U (en) |
-
2014
- 2014-04-22 CN CN201420196974.7U patent/CN203770741U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204492723U (en) | Rotary drilling type bailing tool | |
| CN103953759B (en) | A kind of flanged joint Cuprum alloy five leaf connects muscle safety check | |
| CN203770758U (en) | Three-way plate flow-guide vertical check valve with outer thread connector | |
| CN203770740U (en) | Flange joint two-plate flow guide vertical one-way valve | |
| CN101655084B (en) | Vortex effluent conveyer in natural gas exploitation | |
| CN203770757U (en) | Internal screw joint chromium alloy four-plate flow guide vertical one-way valve | |
| CN203770741U (en) | Five-plate flow guide one-way valve with vertical welding joint | |
| CN103899802B (en) | The vertical one-way valve of screw joint evanohm four plate water conservancy diversion in a kind of | |
| CN206668157U (en) | A kind of auto-excitation type hydroscillator | |
| CN203770742U (en) | Clamp joint six-plate guide vertical one-way valve | |
| CN203770744U (en) | Clamp connector aluminum alloy two-leaf connecting rib vertical check valve | |
| CN103883767B (en) | The vertical one-way valve of a kind of flanged joint two plate water conservancy diversion zinc alloy | |
| CN101749002A (en) | CO2 flooding anticorrosion and gas control lifting technology | |
| CN103899801B (en) | A kind of vertical welding joint Cuprum alloy five plate water conservancy diversion one-way valve | |
| CN103899797B (en) | The vertical one-way valve of a kind of thimble connector six plate water conservancy diversion titanium alloy | |
| CN204716149U (en) | A kind of asymmetric perforate cross impeller vortex-induced vibration suppression device | |
| CN103883768B (en) | The vertical one-way valve of a kind of male connection three plate water conservancy diversion aluminum alloy | |
| CN203770743U (en) | Flange joint copper alloy five-blade connecting rib check valve | |
| CN103953760B (en) | Clamp connector aluminum alloy two-leaf connecting rib vertical check valve | |
| CN202955049U (en) | Double-barreled water jet pump | |
| CN201539242U (en) | CO2 displacement underground anti-corrosion gas-proof device | |
| CN206190272U (en) | Seperated layer water injection of glass steel is managed in pit | |
| CN204754838U (en) | Big latus rectum spiral sand control water conservancy anchor | |
| CN2929170Y (en) | Turbulence flow anti-paraffine tube | |
| CN205533135U (en) | Oil -well pump is used in oil field in pit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20160422 |