CN204942617U - A kind of metered dose dispensers - Google Patents
A kind of metered dose dispensers Download PDFInfo
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- CN204942617U CN204942617U CN201520584883.5U CN201520584883U CN204942617U CN 204942617 U CN204942617 U CN 204942617U CN 201520584883 U CN201520584883 U CN 201520584883U CN 204942617 U CN204942617 U CN 204942617U
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- hot water
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- spool
- individual well
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Abstract
The utility model discloses a kind of metered dose dispensers, comprise valve body, spool, valve gap, measurement channel and metered flow meter, body top sealing cover establishes valve gap, spool is rotatable to be interted into valve body and is rotatably connected with body base, measurement channel connection is arranged between valve body middle and lower part sidewall outer wall and valve body bottom, metered flow meter for measuring the amount of the hot water flowed out from measurement channel is arranged at measurement channel, valve body opposite side is provided with and offers hot water general import, the identical height and position in valve body middle and upper part is equipped with 6-16 individual well outlet mixed with hot water, individual well outlet mixed with hot water is communicated with valve inner, the boring pipe that spool is arranged is communicated with individual well outlet mixed with hot water and measurement channel by valve body, spool end and individual well outlet mixed with hot water can be removed formula and seal and dock, each individual well outlet size mixed with hot water shape is all consistent.A kind of metered dose dispensers structure of the utility model is simple, can provide hot water for many mouthfuls of well pipelines mixed with hot water, and can be sent to the hot water flow of certain a bite oil well by accurate-metering respectively, and valve body, line construction are simple, and floor space is little, processing ease.
Description
Technical field
The utility model relates to a kind of metered dose dispensers, particularly relate to a kind of for the double comb in oil-gas gathering and transportation process (deep fat) mixed with hot water technique metered dose dispensers.
Background technique
At present, in the defeated process of the collection of oilfield production fluid, employing be conventional two-tube (deep fat) mixed with hot water technique.By the oil well produced water that three phases separator separates, after heating, supercharging, deliver to metering station; Again through metering station valve component dispensing hot water piping, be transported to each well head; Finally, hot water mixes the flow line of oil well from well head, mixes with oil well liquid-producing, is transported to metering station by flow line.In metering station, measure by meter the flow that the flow of hot water and the individual well production fluid mixed solution mixed and individual well mix hot water.The two difference is well yield.
Tradition two-tube (deep fat) mixed with hot water technique, valve group, line construction are complicated, and floor space is large, complex operation.Metered dose dispensers, can simplify valve group, pipeline, investment reduction, easily be automated control.
Summary of the invention
The utility model completes to solve deficiency of the prior art, the purpose of this utility model be to provide a kind of structure simple, hot water can be provided for many mouthfuls of well pipelines mixed with hot water, and the hot water flow of certain a bite oil well can be sent to by accurate-metering respectively, valve body, line construction are simple, floor space is little, the metered dose dispensers of processing ease.
A kind of metered dose dispensers of the present utility model, comprise valve body, spool, valve gap, measurement channel and metered flow meter, described body top sealing cover establishes described valve gap, described spool is rotatable to be interted into described valve body and is rotatably connected with body base, described measurement channel connection is arranged between described valve body middle and lower part sidewall outer wall and described valve body bottom, described metered flow meter for measuring the amount of the hot water flowed out from described measurement channel is arranged at described measurement channel, described valve body opposite side is provided with and offers hot water general import, the identical height and position in described valve body middle and upper part is equipped with 6-16 individual well outlet mixed with hot water, the outlet mixed with hot water of described individual well is communicated with described valve inner, the boring pipe that described spool is arranged is communicated with the outlet mixed with hot water of described individual well and described measurement channel by valve body, described spool end and the outlet mixed with hot water of described individual well can be removed formula and seal and dock, each described individual well outlet size mixed with hot water shape is all consistent.
A kind of metered dose dispensers of the present utility model can also be:
Described spool middle and lower part is lower riser, described lower riser hollow, described lower riser is communicated with the measurement channel being positioned at described body base by body base, extended to side in the middle part of described spool have transverse pipe, implement transverse pipe to be communicated with described lower riser, described transverse pipe and the outlet mixed with hot water of described individual well can be removed formula and seal and dock, and described spool top is top mandrel, and described top mandrel is through described valve gap and be connected with described valve bonnet seal.
Be provided with intercommunicating pore in the middle of described body base, described spool lower riser seals with described intercommunicating pore and is communicated with.
Described body base central authorities arrange valve seat, and described intercommunicating pore is opened in described valve seat central authorities, and described spool bottom is rotatable to be sealedly attached on described valve seat, and described spool lower riser end is inserted in described valve seat and is communicated with described intercommunicating pore.
Described transverse pipe end is circular arc, the radius of described transverse pipe end circular arc is identical with described valve interior wall radius, described transverse pipe and described individual well outlet joint mixed with hot water are provided with O-ring seal, described O-ring seal and described valve interior wall offset, and described O-ring seal and described individual well edge of opening mixed with hot water can be removed formula and offset.
Described valve gap central authorities arrange center hole, and described spool inserts described center hole, and described spool outer wall is provided with the central seal circle of annular, described central seal circle and described center hole offset.
Described valve outer wall middle and lower part is provided with measurement of hot water outlet, upper end and the described measurement of hot water outlet of described measurement channel are fixed, described body base is provided with metering hot water and returns entrance, and end and the described metering hot water of described measurement channel return entrance and is communicated with fixing.
The outlet mixed with hot water of described individual well is equidistantly located on described valve body.
Fixed by least three bolts be located on described valve gap between described valve gap and valve body.
Described bolt is equidistantly around being arranged on described valve gap.
A kind of metered dose dispensers of the present utility model, comprise valve body, spool, valve gap, measurement channel and metered flow meter, described body top sealing cover establishes described valve gap, described spool is rotatable to be interted into described valve body and is rotatably connected with body base, described measurement channel connection is arranged between described valve body middle and lower part sidewall outer wall and described valve body bottom, described metered flow meter for measuring the amount of the hot water flowed out from described measurement channel is arranged at described measurement channel, described valve body opposite side is provided with and offers hot water general import, the identical height and position in described valve body middle and upper part is equipped with 6-16 individual well outlet mixed with hot water, the outlet mixed with hot water of described individual well is communicated with described valve inner, the boring pipe that described spool is arranged is communicated with the outlet mixed with hot water of described individual well and described measurement channel by valve body, described spool end and the outlet mixed with hot water of described individual well can be removed formula and seal and dock, each described individual well outlet size mixed with hot water shape is all consistent.Like this, hot water enters valve inner from the hot water general import be connected with hot water piping, for valve body provides hot water, and the hot water in valve body can enter with the oil well pipeline mixed with hot water of described individual well outlet mixed with hot water as single oil well provides hot water from 6-16 the individual well outlet mixed with hot water arranged.6-16 individual well outlet mixed with hot water then connects the oil well of identical number, complete like this can realization provides hot water to many mouthfuls of oil wells by this oil well pipeline mixed with hot water simultaneously, the described valve body of the rotatable insertion of spool is also rotatably connected with body base and makes spool can around own axis, when its turn to exit seal mixed with hot water with one of them individual well dock time, outlet mixed with hot water for this individual well is communicated with the cooperation of measurement channel by valve body by this spool, like this, the hot water provided from this individual well outlet port mixed with hot water can measure, namely the hot water that the outlet mixed with hot water of this individual well provides for oil well is measured, and measure the flow that this oil well mixes the mixed solution of hot water and individual well production fluid more simultaneously, the metric results of both flows of hot water incorporation and mixed solution is with the use of (namely the flow of mixed solution deducts the flow that individual well mixes hot water), measure well yield.Combinationally using of metered dose dispensers of the present utility model and single oil well measurement multiple-way valve, can simplify metering station flow process, easily be automated management, reduces the floor space of direct-through valve.And the consistent object of each individual well outlet size mixed with hot water shape ensures that Spool rotating all can realize providing how much hot water to mix from the outlet mixed with hot water of this individual well to calculate in the oil well of well yield as needed to fetching to measure with this individual well exit seal mixed with hot water formula to needing that individual well outlet port mixed with hot water of measuring.And other individual wells institute is mixed with hot water, the hot water entered from hot water general import in valve body enters in each oil well from the import mixed with hot water of other individual wells by oil well pipeline mixed with hot water, does not measure.That oil well needs to measure well yield, then the individual well be connected with this oil well described by Spool rotating to spool end is mixed with hot water exports docking and measurable individual well amount mixed with hot water.Relative to the advantage of prior art be: structure is simple, can provide hot water for many mouthfuls of well pipelines mixed with hot water, and can be sent to the hot water flow of certain a bite oil well by accurate-metering respectively, and valve body, line construction are simple, and floor space is little, processing ease.
Accompanying drawing explanation
Fig. 1 the utility model metered dose dispensers partly cuts open figure.
Fig. 2 the utility model metered dose dispensers plan view.
Figure number explanation
1 ... spool 2 ... valve gap 3 ... valve body
4 ... individual well outlet 5 mixed with hot water ... hot water general import 6 ... metering hot water returns entrance
7 ... measurement channel 8 ... metered flow meter 9 ... measurement of hot water exports
10 ... lower riser 11 ... transverse pipe 12 ... top mandrel
13 ... intercommunicating pore 14 ... valve seat 15 ... bolt
Embodiment
Fig. 1 to Fig. 2 below in conjunction with accompanying drawing is described in further detail a kind of metered dose dispensers of the present utility model.
A kind of metered dose dispensers of the present utility model, please refer to Fig. 1 to Fig. 2, comprise valve body 3, spool 1, valve gap 2, measurement channel 7 and metered flow meter 8, described valve body 3 top seal lid establishes described valve gap 2, described spool 1 is rotatable intert described valve body 3 and with valve body 3 bottom be rotatably connected, described measurement channel 7 connection is arranged between described valve body 3 middle and lower part sidewall outer wall and described valve body 3 bottom, described metered flow meter 8 for the amount of measuring the hot water flowed out from described measurement channel 7 is arranged at described measurement channel 7, described valve body 3 opposite side is provided with and offers hot water general import 5, the identical height and position in described valve body 3 middle and upper part is equipped with 6-16 individual well outlet 4 mixed with hot water, described individual well outlet mixed with hot water 4 is communicated with described valve body 3 inside, the boring pipe that described spool 1 is arranged is communicated with described individual well outlet mixed with hot water 4 and described measurement channel 7 by valve body 3, described spool 1 end and the outlet 4 mixed with hot water of described individual well can be removed formula and seal and dock, each described individual well outlet mixed with hot water 4 size shape is all consistent.Wherein the effect of valve gap 2 is that sealed valve body 3 avoids the hot water in valve body 3 to spill.Metered flow meter 8 is in the unit of measurement time by the flow of the hot water in measurement channel 7.Rotatable spool 1 rotates to an angle and then realizes spool 1 end and seals with the outlet 4 mixed with hot water of certain individual well and dock under the driving of connected drive unit, and then can measure the flow entering the hot water of the oil well be communicated with it from the outlet 4 mixed with hot water of this individual well.It is then that when facilitating spool 1 to rotate, its end may be docked with any one individual well outlet 4 mixed with hot water sealed type that individual well outlet mixed with hot water 4 is positioned at phase co-altitude, can rotate and remove docking after docking metering.Like this, it is inner that hot water enters valve body 3 from the hot water general import 5 be connected with hot water piping, for valve body 3 provides hot water, and hot water in valve body 3 can enter the oil well pipeline mixed with hot water that is communicated with described individual well outlet mixed with hot water 4 for single oil well and provides hot water from 6-16 the individual well outlet mixed with hot water 4 arranged.6-16 individual well outlet mixed with hot water 4 connects the oil well of identical number, complete like this can realization provides hot water to many mouthfuls of oil wells by this oil well pipeline mixed with hot water simultaneously, the described valve body 3 of the rotatable insertion of spool 1 and with valve body 3 bottom be rotatably connected and make spool 1 can around own axis, when its turn to outlet 4 mixed with hot water with one of them individual well seal dock time, outlet 4 mixed with hot water for this individual well is communicated with the cooperation of measurement channel 7 by valve body 3 by this spool 1, like this, the hot water provided from the outlet 4 mixed with hot water of this individual well can measure, namely the hot water that the outlet 4 mixed with hot water of this individual well provides for oil well is measured, and measure the flow that this oil well mixes the mixed solution of hot water and individual well production fluid more simultaneously, the metric results of both flows of hot water incorporation and mixed solution is with the use of (namely the flow of mixed solution deducts the flow that individual well mixes hot water), measure well yield.Combinationally using of metered dose dispensers of the present utility model and single oil well measurement multiple-way valve, can simplify metering station flow process, easily be automated management, reduces the floor space of direct-through valve.And the consistent object of each individual well outlet mixed with hot water 4 size shape ensures that spool 1 rotates to need that individual well outlet mixed with hot water 4 place of metering all can realize providing how much hot water to mix from the outlet 4 mixed with hot water of this individual well to calculate in the oil well of well yield as needed to fetching to measure with this individual well outlet mixed with hot water 4 sealed type.And other individual wells institute is mixed with hot water, the hot water entered from hot water general import 5 in valve body 3 enters in each oil well from the import mixed with hot water of other individual wells by oil well pipeline mixed with hot water, does not measure.That oil well needs to measure well yield, then spool 1 is rotated the individual well outlet mixed with hot water 4 be connected with this oil well described to spool 1 end and dock i.e. measurable individual well amount mixed with hot water.Relative to the advantage of prior art be: structure is simple, can provide hot water for many mouthfuls of well pipelines mixed with hot water, and can be sent to the hot water flow of certain a bite oil well by accurate-metering respectively, and valve body 3, line construction are simple, and floor space is little, processing ease.
A kind of metered dose dispensers of the present utility model, please refer to Fig. 1 to Fig. 2, the basis of previously described technological scheme can also be: described spool 1 middle and lower part is lower riser 10, described lower riser 10 hollow, described lower riser 10 is by being communicated with the measurement channel 7 be positioned at bottom described valve body 3 bottom valve body 3, extended to side in the middle part of described spool 1 have transverse pipe 11, implement transverse pipe 11 to be communicated with described lower riser 10, described transverse pipe 11 and the outlet 4 mixed with hot water of described individual well can be removed formula and seal and dock, described spool 1 top is top mandrel 12, described top mandrel 12 passes described valve gap 2 and is tightly connected with described valve gap 2.Like this, the hot water flowed out in valve body 3 flows into bottom valve body 3 by measurement channel 7, by entering in the transverse pipe 11 of the spool 1 be communicated with described lower riser 10 with the lower riser 10 of the spool 1 be communicated with bottom valve body 3, dock because the outlet 4 mixed with hot water of transverse pipe 11 and one of them individual well seals, therefore hot water is delivered to individual well outlet 4 mixed with hot water by transverse pipe 11, and enter in oil well by oil well pipeline mixed with hot water, the metered flow meter 8 that this part hot water is arranged on measurement channel 7 in the process by measurement channel 7 measures, it calculates well yield to facilitate follow-up use.Certain spool 1 also can adopt other structures, as long as the individual well pipeline mixed with hot water that can be communicated with valve body 3, measurement channel 7 and individual well outlet mixed with hot water 4 and be attached thereto, as long as metered flow meter 8 can be made can to measure the hot water flow entering the outlet 4 mixed with hot water of this individual well, also to ensure that spool 1 optionally can need with certain the individual well outlet 4 mixed with hot water of measuring to seal and dock simultaneously.Preferred technological scheme is that bottom described valve body 3, centre is provided with intercommunicating pore 13 further, and described spool 1 lower riser 10 seals with described intercommunicating pore 13 and is communicated with.Like this, spool 1 is communicated with the intercommunicating pore 13 of measurement channel 7 by valve body 3, facilitates the hot water in valve body 3 to be delivered in oil well from the individual well be attached thereto outlet 4 mixed with hot water by being entered in spool 1 by intercommunicating pore 13 after measurement channel 7 again again again.Further preferred technological scheme is that described valve body 3 bottom center arranges valve seat 14, described intercommunicating pore 13 is opened in described valve seat 14 central authorities, described spool 1 bottom is rotatable to be sealedly attached on described valve seat 14, and described spool 1 lower riser 10 end is inserted in described valve seat 14 and is communicated with described intercommunicating pore 13.Like this, spool 1 bottom is more closely inserted in the intercommunicating pore 13 of described valve seat 14 central authorities, and spool 1 lower riser 10 is rotationally connected with on described valve seat 14.Convenient be communicated with measurement channel 7 and intercommunicating pore 13 and lower riser 10 and transverse pipe 11 and individual well outlet 4 mixed with hot water.
A kind of metered dose dispensers of the present utility model, please refer to Fig. 1 to Fig. 2, the basis of previously described technological scheme can also be: described transverse pipe 11 end is circular arc, the radius of described transverse pipe 11 end circular arc is identical with described valve body 3 inner radial, described transverse pipe 11 is provided with O-ring seal with described individual well outlet 4 mixed with hot water joint, described O-ring seal and described valve body 3 inwall offset, and described O-ring seal and described individual well edge of opening mixed with hot water can be removed formula and offset.Transverse pipe 11 end is circular arc, and the radius of circular arc is identical with valve body 3 inwall radius, and such transverse pipe 11 end and described valve body 3 inwall offset, and can realize being tightly connected.And the end-rings of transverse pipe 11 is provided with O-ring seal, O-ring seal and valve body 3 inwall offset, O-ring seal ensures that individual well outlet mixed with hot water 4 is docked for sealing with described docking of transverse pipe 11, avoids hot water overflow from transverse pipe 11 and individual well outlet 4 mixed with hot water and affect the accuracy of individual well flow measurement mixed with hot water.Can also be that described valve gap 2 central authorities arrange center hole, described spool 1 inserts described center hole, and described spool 1 outer wall is provided with the central seal circle of annular, described central seal circle and described center hole offset.Like this, spool 1 can be fixed in center hole by the sealing of central seal circle, and then spool 1 and valve gap 2 is sealed and be rotatably connected.Spool 1 can rotate in center hole, and in the process of rotation, central seal circle avoids the hot water in valve body 3 to spill from center hole.
A kind of metered dose dispensers of the present utility model, please refer to Fig. 1 to Fig. 2, the basis of previously described technological scheme can also be: described valve body 3 outer wall middle and lower part is provided with measurement of hot water outlet 9, upper end and the described measurement of hot water of described measurement channel 7 export 9 be communicated with fixing, be provided with metering hot water bottom described valve body 3 and return entrance 6, end and the described metering hot water of described measurement channel 7 return entrance 6 and are communicated with fixing.Like this, hot water in valve body 3 flows out from the measurement of hot water outlet 9 inside and outside the connection valve body 3 being arranged at valve body 3 outer wall middle and lower part, to enter in measurement channel 7 and the metered flow meter 8 be arranged in measurement channel 7 measures the flow of the hot water passed through, hot water is discharged from measurement channel 7 end afterwards, returning entrance 6 by the metering hot water bottom valve body 3 enters in spool 1, and then export individual well outlet 4 mixed with hot water to from spool 1, then enter in oil well by oil well pipeline mixed with hot water, realize the flow measurement of this path hot water.Certainly can also be the setting of other structures, as long as ensure that in valve body 3, hot water is by entering individual well outlet 4 mixed with hot water after metering.Can also be that described individual well outlet mixed with hot water 4 is equidistantly located on described valve body 3, like this because the outlet 4 mixed with hot water of each individual well is positioned at sustained height, and its shape and size are all identical, therefore its discharge capacity is more or less the same, and the advantage that equidistantly ring is established makes overall metered dose dispensers structure more balanced, smooth running more, facilitates rotary spool 1 that spool 1 internal channel is more prone to the rotation process needing the individual well outlet 4 mixed with hot water sealed type of measuring to dock simultaneously.
A kind of metered dose dispensers of the present utility model, please refer to Fig. 1 to Fig. 2, and the basis of previously described technological scheme can also be: fixed by least three bolts 15 be located on described valve gap 2 between described valve gap 2 and valve body 3.Valve gap 2 and valve body 3 can be fixed like this, and due to bolt 15 be common link, cost is low, detachable and also connect and dismantle all convenient.Preferred technological scheme is that described bolt 15 is equidistantly around being arranged on described valve gap 2 further.Such bolt 15 is stressed more even, avoids stress to concentrate.
Above-mentionedly only several specific embodiments in the utility model to be illustrated; but can not as protection domain of the present utility model; every according to the change of the equivalence done by design spirit in the utility model or to modify or equal proportion zooms in or out, all should think and fall into protection domain of the present utility model.
Claims (10)
1. a metered dose dispensers, it is characterized in that: comprise valve body, spool, valve gap, measurement channel and metered flow meter, described body top sealing cover establishes described valve gap, described spool is rotatable to be interted into described valve body and is rotatably connected with body base, described measurement channel connection is arranged between described valve body middle and lower part sidewall outer wall and described valve body bottom, described metered flow meter for measuring the amount of the hot water flowed out from described measurement channel is arranged at described measurement channel, described valve body opposite side is provided with and offers hot water general import, the identical height and position in described valve body middle and upper part is equipped with 6-16 individual well outlet mixed with hot water, the outlet mixed with hot water of described individual well is communicated with described valve inner, the boring pipe that described spool is arranged is communicated with the outlet mixed with hot water of described individual well and described measurement channel by valve body, described spool end and the outlet mixed with hot water of described individual well can be removed formula and seal and dock, each described individual well outlet size mixed with hot water shape is all consistent.
2. a kind of metered dose dispensers according to claim 1, it is characterized in that: described spool middle and lower part is lower riser, described lower riser hollow, described lower riser is communicated with the measurement channel being positioned at described body base by body base, extended to side in the middle part of described spool have transverse pipe, implement transverse pipe to be communicated with described lower riser, described transverse pipe and the outlet mixed with hot water of described individual well can be removed formula and seal and dock, described spool top is top mandrel, and described top mandrel passes described valve gap and is connected with described valve bonnet seal.
3. a kind of metered dose dispensers according to claim 2, is characterized in that: be provided with intercommunicating pore in the middle of described body base, described spool lower riser seals with described intercommunicating pore and is communicated with.
4. a kind of metered dose dispensers according to claim 3, it is characterized in that: described body base central authorities arrange valve seat, described intercommunicating pore is opened in described valve seat central authorities, described spool bottom is rotatable to be sealedly attached on described valve seat, and described spool lower riser end is inserted in described valve seat and is communicated with described intercommunicating pore.
5. a kind of metered dose dispensers according to claim 2, it is characterized in that: described transverse pipe end is circular arc, the radius of described transverse pipe end circular arc is identical with described valve interior wall radius, described transverse pipe and described individual well outlet joint mixed with hot water are provided with O-ring seal, described O-ring seal and described valve interior wall offset, and described O-ring seal and described individual well edge of opening mixed with hot water can be removed formula and offset.
6. a kind of metered dose dispensers according to claim 2, it is characterized in that: described valve gap central authorities arrange center hole, described spool inserts described center hole, and described spool outer wall is provided with the central seal circle of annular, described central seal circle and described center hole offset.
7. a kind of metered dose dispensers according to any one claim of claim 1 to 6, it is characterized in that: described valve outer wall middle and lower part is provided with measurement of hot water outlet, upper end and the described measurement of hot water outlet of described measurement channel are fixed, described body base is provided with metering hot water and returns entrance, and end and the described metering hot water of described measurement channel return entrance and is communicated with fixing.
8. a kind of metered dose dispensers according to any one claim of claim 1 to 6, is characterized in that: the outlet mixed with hot water of described individual well is equidistantly located on described valve body.
9. a kind of metered dose dispensers according to any one claim of claim 1 to 6, is characterized in that: fixed by least three bolts be located on described valve gap between described valve gap and valve body.
10. a kind of metered dose dispensers according to claim 9, is characterized in that: described bolt is equidistantly around being arranged on described valve gap.
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| CN201520584883.5U CN204942617U (en) | 2015-08-05 | 2015-08-05 | A kind of metered dose dispensers |
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| CN201520584883.5U CN204942617U (en) | 2015-08-05 | 2015-08-05 | A kind of metered dose dispensers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065721A (en) * | 2015-08-05 | 2015-11-18 | 北京双良石油技术有限公司 | Metering distributor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065721A (en) * | 2015-08-05 | 2015-11-18 | 北京双良石油技术有限公司 | Metering distributor |
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Effective date of registration: 20161031 Address after: 100176 Beijing economic and Technological Development Zone, Daxing District Hongda Road, No. 2, layer 16, layer Patentee after: BEIJING PETRODAMO ENGINEERING TECHNOLOGY CO., LTD. Address before: 100095 Beijing city Haidian District P.Tricuspidata Road No. 9 Building No. 6 hospital Patentee before: Beijing Shuan Liang Petrotechnik Ltd. |