CN204457523U - Measurement mechanism - Google Patents
Measurement mechanism Download PDFInfo
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- CN204457523U CN204457523U CN201420835841.XU CN201420835841U CN204457523U CN 204457523 U CN204457523 U CN 204457523U CN 201420835841 U CN201420835841 U CN 201420835841U CN 204457523 U CN204457523 U CN 204457523U
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- pipe
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Abstract
The application discloses a kind of measurement mechanism, comprising: joint, and it is for connecting well head to input drilling fluid; Moment of torsion generation part, it comprises the first pipeline and second pipe; Described first pipeline and described joint are rotationally connected, and drilling fluid can input in described first pipeline by described joint; One end of described second pipe connects described first pipeline and communicates with described first pipe interior, and its other end can export drilling fluid and produce the moment of torsion that described moment of torsion generation part is rotated around described first conduit axis; Torque sensor, it connects described moment of torsion generation part to measure described moment of torsion.Described joint is a bend pipe, and its angle of bend is greater than 90 degree.The quantity of described second pipe is n >=2 piece, and the cross-sectional area of described second pipe is the 1/n of described first conduit cross-sectional area.The application provide a kind of measurement mechanism can improve the certainty of measurement of drilling fluids outlet flow value.
Description
Technical field
The application relates to flow monitoring field, particularly relates to a kind of measurement mechanism.
Background technology
In oil and gas well drilling engineering, when bottom pressure is less than strata pressure, formation fluid may invade pit shaft, causing overflow, as taken measures to bring out blowout not in time, causing immeasurable loss; When bottom pressure is less than strata pressure, when meeting fracture formation or high-permeability reservoir as bored, drilling fluid can flow into stratum, causes leakage, causes economic loss, also may bring out other extremely.
Traditional drilling fluid overflow and leakage monitoring method are mud pit level monitoring methods, and the method is slow in reacting, and hysteresis quality is stronger.Existing theory think the mud flow rate at drilling fluid outlet place to overflow and leakage more responsive, the important parameter judging leakage and overflow in wellbore construction process, so can the mud flow rate at drilling fluid outlet place be monitored by flow meter and then judge whether shaft bottom leakage and overflow accident occur.
At situ of drilling well, the flow that drilling fluid outlet place commonly uses counts baffle-type flow meter.When drilling fluid is by this baffle-type flow meter, promotes the flapper of baffle-type flow meter, be issued to balance in the reaction of the built-in spring of baffle-type flow meter.Now, origin-location certain angle is departed from the baffle plate present position of baffle-type, and the angle that the larger baffle plate of mud flow rate departs from is larger.Measure this angle and just can extrapolate mud flow rate.
Above-mentioned baffle-type flow meter in use, due to certain deviation angle can be formed, make to have a small amount of drilling fluid when drilling fluid flows cannot act on baffle plate, this just makes baffle plate cannot monitor the flow of this part drilling fluid, make certainty of measurement poor, cannot provide for drilling engineering personnel the reliable drilling fluids outlet flow value judging overflow or leakage.。
Utility model content
In view of the deficiencies in the prior art, the application provides a kind of measurement mechanism, can improve the certainty of measurement of drilling fluids outlet flow value.
A kind of measurement mechanism that the application provides, comprising:
Joint, it is for connecting well head to input drilling fluid;
Moment of torsion generation part, it comprises the first pipeline and second pipe; Described first pipeline and described joint are rotationally connected, and drilling fluid can input in described first pipeline by described joint; One end of described second pipe connects described first pipeline and communicates with described first pipe interior, and its other end can export drilling fluid and produce the moment of torsion that described moment of torsion generation part is rotated around described first conduit axis;
Torque sensor, it connects described moment of torsion generation part to measure described moment of torsion.
Preferably, be provided with rotating connector between described first pipeline and described joint, described rotating connector comprises housing, upper pipeline, lower pipeline; Described upper pipeline and described lower pipeline are positioned at described housing, are provided with seal between described upper pipeline and described lower pipeline; Described upper pipeline is fixedly connected with described housing; Be provided with bearing between described lower pipeline and described housing, one end of described lower pipeline is stretched out described housing and is connected with described first pipeline; One end of described housing is connected with described joint sealing to make described joint drilling fluid can be inputted described upper pipeline.
Preferably, described joint is a bend pipe, and its angle of bend is greater than 90 degree.
Preferably, the quantity of described second pipe is n >=2 piece, and the cross-sectional area of described second pipe is the 1/n of described first conduit cross-sectional area.
Preferably, described second pipe is extend along hand of helix.
Preferably, described second pipe development length is the length of the circular helix of half revolution.
Preferably, described moment of torsion generation part comprises at least one pair of centrosymmetric described second pipe, described centrosymmetric central point be described first pipeline with the center of circle of described second pipe link position place cross section.
Preferably, described measurement mechanism also comprises earial drainage cylinder, described earial drainage cylinder one end open, and its other end has bottom; Described bottom is provided with brace table, and described brace table connects described torque sensor to support described torque sensor; Drilling fluid can export in described earial drainage cylinder by described second pipe; Described bottom is provided with releases hole for what discharge drilling fluid.
Preferably, the most recess that hole is positioned at described bottom is released described in.
Preferably, described torque sensor is connected with moment of torsion flow modular converter, and described moment of torsion flow modular converter can according to the flow of described torque arithmetic drilling fluid.
By above description, can find out that measurement mechanism that the application provides is by being provided with described moment of torsion generation part mud flow rate being converted to moment of torsion, simultaneously, the moment of torsion that described moment of torsion generation part produces is the result that all drilling fluids act on simultaneously, can not occur some drilling fluid of prior art baffle-type flow meter measure less than situation, and then be the flow of drilling fluid by the flow that the torque value that described torque sensor records calculates, so the measurement mechanism that the application provides can improve the certainty of measurement of drilling fluids outlet flow value.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the measurement mechanism structural representation that a kind of embodiment of the application provides;
Fig. 2 is the rotating connector structural representation that the application's embodiment provides;
Fig. 3 is the moment of torsion generation part structural representation that the application's embodiment provides;
Fig. 4 is the earial drainage barrel structure schematic diagram that the application's embodiment provides.
Detailed description of the invention
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of the utility model protection.
Please refer to Fig. 1, a kind of embodiment of the application provides a kind of measurement mechanism, and comprising: joint 1, it is for connecting well head to input drilling fluid; Moment of torsion generation part 3, it comprises the first pipeline 31 and second pipe 32; Described first pipeline 31 is rotationally connected with described joint 1, and drilling fluid can input in described first pipeline 31 by described joint 1; One end of described second pipe 32 connects described first pipeline 31 and communicates with described first pipeline 31 inside, and its other end can export drilling fluid and produce the moment of torsion that described moment of torsion generation part 3 is rotated around described first pipeline 31 axis; Torque sensor 4, it connects described moment of torsion generation part 3 to measure described moment of torsion.
During use, measurement mechanism present embodiment provided is connected with wellhead drilling fluid output pipe by described joint 1.Drilling fluid is entered after in described first pipeline 31 by described joint 1 and enters described second pipe 32, described drilling fluid forms a discharge direction opposite effect power to described second pipe 32 when described second pipe 32 is discharged, have the arm of force of certain distance between the axis of this active force and described first pipeline 31, the arm of force described in this force fit forms the moment of torsion that described moment of torsion generation part 3 is rotated around described first pipeline 31 axis.Under the effect of described moment of torsion, described moment of torsion generation part 3 has the trend rotated around described first pipeline 31 axis, because described moment of torsion generation part 3 connects described torque sensor 4, described torque sensor 4 is prevented described moment of torsion generation part 3 and is rotated around described first pipeline 31 axis, and described torque sensor 4 rotates to measure by preventing described moment of torsion generation part 3 size knowing described moment of torsion.When fluid density is certain, described torque value becomes positive correlation with 2 powers of the size of mud flow rate, thus calculates the size of mud flow rate.
By above description, can find out that measurement mechanism that present embodiment provides is by being provided with the described moment of torsion generation part 3 mud flow rate being converted to moment of torsion, simultaneously, the moment of torsion that described moment of torsion generation part 3 produces is the result that all drilling fluids act on simultaneously, can not occur some drilling fluid of prior art baffle-type flow meter measure less than situation, and then the measurement mechanism that present embodiment provides is the flow of drilling fluid by the flow that the torque value that described torque sensor 4 records calculates, so can improve the certainty of measurement of drilling fluids outlet flow value.
Please continue to refer to Fig. 1, described joint 1 is for connecting well head to input drilling fluid, and it can be a segment pipe.Consider in drilling fluid usually can have a large amount of solid phase particles, for the solid phase particles that enables drilling fluid of following smoothly flows out and can not deposit in pipeline, described joint 1 can be a bend pipe, and its angle of bend is greater than 90 degree.Arranged by this kind, drilling fluid is when flowing into described joint 1, and the solid phase particles in drilling fluid is under the impact of self gravitation, and the obtuse angle simultaneously in conjunction with described bend pipe designs, solid phase particles can not be hindered along with the flowing of drilling fluid, and then can not accumulate at described joint 1 place.Figure 1 shows that example, the angle of described joint 1 is 100 degree, and the angle between the axis of the pipeline section of the axis namely with the pipeline section of the entrance of described joint 1 and the outlet with described joint 1 is 100 degree.When described measurement mechanism horizontal positioned, the elevation angle that also can be considered as described joint 1 is 10 degree.
Because described moment of torsion generation part 3 can produce certain moment of torsion under the effect of described drilling fluid, for not affecting the result measured by described torque sensor 4, for being rotationally connected between described joint 1 and described moment of torsion generation part 3, that is, described moment of torsion generation part 3 can produce relative to described joint 1 and rotate.The described form be rotationally connected has various ways to realize, please refer to the rotating connector 2 shown in Fig. 2 as the application's one preferred embodiment, can be provided with described rotating connector 2 between described first pipeline 31 and described joint 1, described rotating connector 2 comprises housing 21, upper pipeline 22, lower pipeline 24.Described upper pipeline 22 is positioned at described housing 21 with described lower pipeline 24, is provided with seal 23 between described upper pipeline 22 and described lower pipeline 24.Described upper pipeline 22 is fixedly connected with described housing 21.Be provided with bearing 25 between described lower pipeline 24 and described housing 21, one end of described lower pipeline 24 is stretched out described housing 21 and is connected with described first pipeline 31; One end of described housing 21 and described joint 1 are tightly connected to make described joint 1 drilling fluid can be inputted described upper pipeline 22.
For convenience of manufacture technics, described housing 21 can comprise upper shell 211 and lower house 212, can be Flange joint, be provided with gasket seal between certain flange between described upper shell 211 and described joint 1.Same between described upper shell 211 with described lower house 212 can be Flange joint.Described upper shell 211 and described upper pipeline 22 are for being fixedly connected with, and as shown in Figure 2, described upper pipeline 22 by welding, can form integral structure through polishing with described upper shell 211.Described lower pipeline 24 is positioned at below described upper pipeline 22 and then inputs the drilling fluid of described upper pipeline 22.For avoiding the end contact of the end face of described upper pipeline 22 and described lower pipeline 24 and then producing frictional resistance, can be separated by between described upper pipeline 22 and described lower pipeline 24 gap of 1 millimeter to 5 millimeters.
Flow out from the described gap between described upper pipeline 22 and described lower pipeline 24 for avoiding drilling fluid, ensure that all drilling fluids enter in described lower pipeline 24, described seal 23 is provided with between described upper pipeline 22 and described lower pipeline 24, described seal 23 can be sealing ring and/or airtight and watertight padding, Figure 2 shows that example, the lower end that described seal 23 is set in described upper pipeline 22 seals the upper surface being adjacent to described lower pipeline 24 simultaneously.For ensureing the sealing effectiveness of described seal 23, seal closure 26 is provided with outside described seal 23, described seal 23 is limited between described upper pipeline 22 and described lower pipeline 24 by described seal closure 26, and described seal closure 26 is fixedly connected with the lower end of described upper pipeline 22.Certainly, for ensureing sealing effectiveness further, described seal closure 26 is provided with gland 27, can be provided with and isolate gum cover 28 between described gland 27 and described upper pipeline 22, can prevent drilling fluid from infiltrating in described lower house 212 by described isolation gum cover 28, cause the leakage of drilling fluid.
Described bearing 25 is provided with between described lower pipeline 24 and described lower house 212, concrete, described bearing 25 is located on described lower pipeline 24 by its inner ring fixed cover, and, the outer ring of described bearing 25 and described lower house 212 can interference fit, and then described lower pipeline 24 can produce relative rotation relative to described upper pipeline 22 and described housing 21.One end of described lower pipeline 24 is stretched out described lower house 212 and is connected described moment of torsion generation part 3.For ensureing the opposing seal of whole housing 21, avoid producing between described housing 21 and described lower house 212 rubbing simultaneously, and then lining 29 can be provided with at described lower house 212 with described, and then change described lining 29 in use for some time.Can be provided with the potted component be arranged on below described bearing 25 between described lining 29 and described housing 21, sealing element can ensure the sealing state of whole housing 21.
Please refer to Fig. 3, described moment of torsion generation part 3 its for generation of moment of torsion, the flow of drilling fluid can be calculated according to this moment of torsion.Consider that described moment of torsion must have whole drilling fluid to participate in producing, described moment of torsion generation part 3 comprises described first pipeline 31 and described second pipe 32.Described first pipeline 31 is rotationally connected with described joint 1, and concrete, described first pipeline 31 can be connected by described rotating connector 2 with between described joint 1.One end of described second pipe 32 can connect the sidewall of described first pipeline 31, what its other end extended the drilling fluid that certain length and the port of this end spray produces an active force to this end, there is an arm of force between the axis of this active force and described first pipeline 31, and then the arm of force described in this force fit forms the moment that described moment of torsion generation part 3 is rotated around described first pipeline 31 axis.Meanwhile, the drilling fluid that described first pipeline 31 enters all can be discharged by described second pipe 32, and then described moment produces based on whole drilling fluid, and then the flow of the drilling fluid calculated by this moment is comparatively accurate.
Consider when described second pipe 32 is provided with one, other the active force except described moment that described first pipeline 31 is subject to is at its circumferential skewness, and then certain impact can be produced on the moment that it produces, consider based on this kind, the quantity of described second pipe 32 can be n >=2 piece, and the cross-sectional area of described second pipe 32 can be the 1/n of described first pipeline 31 cross-sectional area.The cross-sectional area of described second pipe 32 is that the 1/n of described first pipeline 31 cross-sectional area can ensure that the flow velocity of described drilling fluid can not change when described moment of torsion generation part 3 shunting is discharged, and then avoids causing measured moment of torsion that the change of non-predictability occurs because drilling fluid flow velocity changes.
Figure 3 shows that example, described second pipe 32 can be extend along hand of helix.Certainly, described second pipe 32 is screw downward-extension, and then it is inner to ensure that the solid phase particles of drilling fluid its inside when flowing through described second pipe 32 can not accumulate at described second pipe 32, and then the flow measurement work that preferably can adapt to different drilling fluid that present embodiment is provided.Because the flow field around the baffle plate of prior art baffle-type flow meter is comparatively complicated, solid phase particles in drilling fluid is the cutting grain that shape size differs, stream field disturbance is comparatively strong, add that the reheology model of liquid phase in drilling fluid is non-linear, baffle-type flow measurement accuracy of measurement can be affected equally, and there is the second pipe 32 that described bent angle and described moment of torsion generation part 3 extend spirally downwards due to described joint 1 in the measurement mechanism that present embodiment provides, make described measurement mechanism can adapt to the existence of solid phase particles in drilling fluid preferably, the situation that solid phase particles is detained pipeline can not be there is, and then special restriction is not had to the physico-chemical property of drilling fluid.In present embodiment preferred embodiment, described second pipe 32 development length can be the length of the circular helix of half revolution.
Shown in composition graphs 1 and Fig. 3, described moment of torsion generation part 3 can comprise at least one pair of centrosymmetric described second pipe 32, described centrosymmetric central point be described first pipeline 31 with the center of circle of described second pipe 32 link position place cross section.Figure 1 shows that example, described measurement mechanism comprises a pair centrosymmetric described second pipe 32, and described a pair centrosymmetric described second pipe 32 development length is the length of the isometrical circular helix of half revolution.Flow to contrary when drilling fluid is flowed out by this outlet to described second pipe 32, angle difference 180 degree, this is contrary to the force direction of the described drilling fluid that described second pipe 32 is subject to, and all there is the arm of force (this torque arm length is the diameter of described circular helix cylinder) of certain distance for the axis of described first pipeline 31.This is 1/2 of described first pipeline 31 cross-sectional area to the cross-sectional area of described second pipe 32, and then when described drilling fluid flows in described second pipe 32, flow velocity can not change.Because second pipe described in a pair 32 is about Central Symmetry, and then the active force of drilling fluid when two described second pipes 32 flow for tube wall is identical, flow in two described second pipes 32 is equal equally, vertical direction (along described first pipeline 31 axially) upper drilling fluid can be eliminated on the active force of described second pipe 32 and moment on the impact of measuring, so the moment of torsion that described moment of torsion generation part 3 produces in such cases can reflect the real traffic of described drilling fluid more accurately.Meanwhile, second pipe 32 described in described a pair extends spirally the solid phase particles that ensure that in drilling fluid downwards and can not be trapped in pipeline.
Described torque sensor 4 connects described moment of torsion generation part 3, concrete, as shown in Figure 1, described torque sensor 4 can connect the lower end of described first pipeline 31, certainly, connected mode can be taked multiple, and preferably connected mode can take removable connection, in a preferred embodiment, the lower end of described first pipeline 31 of described moment of torsion generation part 3 can be connected with described torque sensor 4 by latch.The torque that described torque sensor 4 can be rotated by the described moment of torsion generation part 3 of restriction and then moment of torsion generation part 3 described in perception produces, by the measured described torque value obtained by calculating the flow that can draw described drilling fluid, when actual field needs, the size of well head mud flow rate can be measured in real time.In a preferred embodiment, described torque sensor 4 can be connected with moment of torsion flow modular converter, and described moment of torsion flow modular converter can according to the flow of described torque arithmetic drilling fluid.That considers that described torque sensor 4 records is generally analog signal, need the conversion carrying out signal, so can A/D converter be provided with between described torque sensor 4 and described moment of torsion flow modular converter, be converted to the data signal that can be identified through analog signal described in the process of described A/D sensor, data signal calculates through described moment of torsion flow modular converter and then draws the uninterrupted of drilling fluid.Can also wave filter be provided with between described A/D converter and described torque sensor 4, avoid the interference of other signals, and then improve certainty of measurement.
Please continue to refer to Fig. 1, the described measurement mechanism that a kind of embodiment of the application provides can also comprise earial drainage cylinder 5, described earial drainage cylinder 5 one end open 51, and its other end has bottom 52.Described bottom 52 is provided with brace table 53, and described brace table 53 connects described torque sensor 4 to support described torque sensor 4.Drilling fluid can export in described earial drainage cylinder 5 by described second pipe 32; Described bottom 52 is provided with releases hole 54 for what discharge drilling fluid.
Further, please refer to Fig. 4, described earial drainage cylinder 5 entirety is one side closed tubular, and described joint 1, described rotating connector 2, described moment of torsion generation part 3, described torque sensor 4 all can be arranged in described earial drainage cylinder 5.Described earial drainage cylinder 5 for collecting the drilling fluid flowed out by described second pipe 32, by its barrel prevent next moment of torsion generation part 3 drilling fluid splash outflow, and by collected drilling fluid by described relief port earial drainage to vibrosieve.Described brace table 53 entirety can be set to cylindrical, and is arranged on the center of described bottom 52.The upper surface of described brace table 53 can be provided with stud, and then by torque sensor 4 described in Flange joint.Described bottom 52 can be oblique cone platform curved surface structure, and entirety tilts to described hole 54 of releasing, and angle of inclination can be 10 degree, and then releases the most recess that hole 54 is positioned at described bottom 52 described in making.Arranged by this kind, when drilling fluid is collected into the described bottom 52 of described earial drainage cylinder 5, the solid phase particles such as the landwaste in described drilling fluid can not be trapped in described earial drainage cylinder 5, and releasing hole 54 described in can passing through smoothly enters in next process, and then can ensure normally carrying out of sieve residue log.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and manual just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (10)
1. a measurement mechanism, is characterized in that, comprising:
Joint, it is for connecting well head to input drilling fluid;
Moment of torsion generation part, it comprises the first pipeline and second pipe; Described first pipeline and described joint are rotationally connected, and drilling fluid can input in described first pipeline by described joint; One end of described second pipe connects described first pipeline and communicates with described first pipe interior, and its other end can export drilling fluid and produce the moment of torsion that described moment of torsion generation part is rotated around described first conduit axis;
Torque sensor, it connects described moment of torsion generation part to measure described moment of torsion.
2. measurement mechanism as claimed in claim 1, it is characterized in that: be provided with rotating connector between described first pipeline and described joint, described rotating connector comprises housing, upper pipeline, lower pipeline; Described upper pipeline and described lower pipeline are positioned at described housing, are provided with seal between described upper pipeline and described lower pipeline; Described upper pipeline is fixedly connected with described housing; Be provided with bearing between described lower pipeline and described housing, one end of described lower pipeline is stretched out described housing and is connected with described first pipeline; One end of described housing is connected with described joint sealing to make described joint drilling fluid can be inputted described upper pipeline.
3. measurement mechanism as claimed in claim 1, is characterized in that: described joint is a bend pipe, and its angle of bend is greater than 90 degree.
4. measurement mechanism as claimed in claim 1, it is characterized in that: the quantity of described second pipe is n >=2 piece, the cross-sectional area of described second pipe is the 1/n of described first conduit cross-sectional area.
5. measurement mechanism as claimed in claim 1, is characterized in that: described second pipe is for extend along hand of helix.
6. measurement mechanism as claimed in claim 5, is characterized in that: described second pipe development length is the length of the circular helix of half revolution.
7. the measurement mechanism as described in claim 4 to 6 any one, it is characterized in that: described moment of torsion generation part comprises at least one pair of centrosymmetric described second pipe, described centrosymmetric central point be described first pipeline with the center of circle of described second pipe link position place cross section.
8. measurement mechanism as claimed in claim 1, is characterized in that: described measurement mechanism also comprises earial drainage cylinder, described earial drainage cylinder one end open, and its other end has bottom; Described bottom is provided with brace table, and described brace table connects described torque sensor to support described torque sensor; Drilling fluid can export in described earial drainage cylinder by described second pipe; Described bottom is provided with releases hole for what discharge drilling fluid.
9. measurement mechanism as claimed in claim 8, is characterized in that: described in release the most recess that hole is positioned at described bottom.
10. measurement mechanism as claimed in claim 1, it is characterized in that: described torque sensor is connected with moment of torsion flow modular converter, described moment of torsion flow modular converter can according to the flow of described torque arithmetic drilling fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420835841.XU CN204457523U (en) | 2014-12-25 | 2014-12-25 | Measurement mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420835841.XU CN204457523U (en) | 2014-12-25 | 2014-12-25 | Measurement mechanism |
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| CN204457523U true CN204457523U (en) | 2015-07-08 |
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| CN201420835841.XU Withdrawn - After Issue CN204457523U (en) | 2014-12-25 | 2014-12-25 | Measurement mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563929A (en) * | 2014-12-25 | 2015-04-29 | 中国石油天然气集团公司 | Measuring device |
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2014
- 2014-12-25 CN CN201420835841.XU patent/CN204457523U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563929A (en) * | 2014-12-25 | 2015-04-29 | 中国石油天然气集团公司 | Measuring device |
| CN104563929B (en) * | 2014-12-25 | 2017-06-13 | 中国石油天然气集团公司 | Measurement apparatus |
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Granted publication date: 20150708 Effective date of abandoning: 20170613 |