CN205063867U - Mix drilling fluid and detect structure at linear density - Google Patents
Mix drilling fluid and detect structure at linear density Download PDFInfo
- Publication number
- CN205063867U CN205063867U CN201520581198.7U CN201520581198U CN205063867U CN 205063867 U CN205063867 U CN 205063867U CN 201520581198 U CN201520581198 U CN 201520581198U CN 205063867 U CN205063867 U CN 205063867U
- Authority
- CN
- China
- Prior art keywords
- drilling fluid
- density
- pipeline
- vertical tube
- density detection
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
The utility model discloses a mix drilling fluid and detect structure at linear density, including the trunk line that is the type of falling L that mixes the drilling fluid, the trunk line includes horizontal trunk line, perpendicular trunk line, still including the density measuring pipeline, the gradiomanometer that are the U type, density detects the pipeline and includes a vertical pipe, the 2nd vertical pipe and connect the connecting pipe between a vertical pipe, the 2nd vertical pipe lower extreme, a vertical pipe's length is greater than the 2nd vertical pipe's length, a vertical pipe's upper end and horizontal trunk line intercommunication, the 2nd vertical pipe feeds through with perpendicular trunk line, the gradiomanometer is installed on density detects the pipeline. Its simple structure just can be immediately, the accurate density that detects the mixed drilling fluid of normal flow in the trunk line.
Description
Technical field
The utility model belongs to drilling equipment technical field, relates to the online Density Detection structure of a kind of mixing drilling fluid.
Background technology
Compare with well drilling of shallow sea with land, deep sea drilling environment is more complicated, the technology adopted and land different, many areas all exist that drilling fluid density window is narrow, shallow gas, shallow seated groundwater, it is large that strata pressure controls difficulty, very easily cause the down hole problems such as overflow, blowout and leakage accident can be caused time serious, cause great difficulty to drilling well.In order to control the harm such as shallow-layer current, need to utilize dynamic well killing system, its principle is by the high density well control fluids prepared in advance and low density drilling fluid when normally creeping into or seawater, automatically the mixed sizing device of density can be controlled by one, automatically required drilling fluid density is adjusted to, the direct slush pump that supplies continuously is pumped into down-hole in well, control strata pressure, and then control formation fluid enters pit shaft effectively, reduce well kick, the drilling complexity situations such as leakage, improve drilling efficiency and drilling safety, truly realize the dynamic kill-job drillng operation that operation limit, limit is increased the weight of.For ensureing the safety of dynamic kill-job drilling well, detecting mixing drilling fluid density is in time indispensable link, so that grasp annular pressure in time, ensures safety drilling.
The general densometer that the device for detecting density of current employing is mounted in drilling fluid tank carrys out detection density, this detection mode need wait until in drilling fluid tank that mixing drilling fluid submergence densometer inductor just can detect density, comparatively delayed, and whenever adjustment density need by the remaining drilling fluid in drilling fluid tank emptying could detect regulate after density, waste drilling fluid materials, need when manual detection density to sample in drilling fluid tank, action is comparatively dangerous, does not meet the requirement of safety work.And original densometer mount scheme is comparatively loaded down with trivial details by after original drilling fluid tank perforate operation, need install.
Existing general densometer is when detecting forward (flowing from the top down) and flowing into fluid density in vertical pipe, a slice static pressure negative pressuren zone can be produced at Density Detection entrance bent sub place when rate of flow of fluid is excessive, negative pressuren zone can feed through to upper pressure inductor, induction pressure that can not be correct, directly affect Densitometer Readings accuracy, at present vertical pipe is all adopted to be inverted and detect, fluid Down-Up flows into Density Detection pipeline, when fluid pressure is less, fluid can not submergence pressure inductor, can't detect density.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a kind of mixing drilling fluid online Density Detection structure, its structure is simple, just immediately, accurately can detect the density of the mixing drilling fluid of forward flow in main pipeline.
The purpose of this utility model is achieved in that
The online Density Detection structure of a kind of mixing drilling fluid, comprise the main pipeline in inverted L shape of mixing drilling fluid, described main pipeline comprises horizontal main pipeline, vertical main pipeline, also comprise U-shaped Density Detection pipeline, gradiomanometer, described Density Detection pipeline comprises the first vertical tube, second vertical tube and be connected to the first vertical tube, tube connector between second vertical tube lower end, the length of described first vertical tube is greater than the length of the second vertical tube, the upper end of described first vertical tube is communicated with horizontal main pipeline, described second vertical tube is communicated with vertical main pipeline, described gradiomanometer is arranged on Density Detection pipeline.
For the ease of installing gradiomanometer, preferably, described gradiomanometer is arranged on the upper end of the first vertical tube, and upper pressure inductor, the downforce inductor of gradiomanometer are all positioned at the first vertical tube.
For the ease of safety sampling, preferably, also comprise sampling water tap, described sampling water tap is arranged on tube connector.
In order to ensure the bonding strength of main pipeline, Density Detection pipeline, and be convenient to the installation of the utility model structure, preferably, described main pipeline, Density Detection pipeline are molded as one.
In order to ensure that fluid can flow in Density Detection pipeline fast, instant detection density, preferably, the aperture of described Density Detection pipeline is less than the aperture of main pipeline.
Owing to have employed technique scheme, the utility model has following beneficial effect:
1. Density Detection pipeline adopts " U " type Density Detection pipe design, second vertical tube of Density Detection pipeline produces back pressure, the static pressure negative pressure that fluid forward flows into the first vertical tube generation can be eliminated, thus the Density Detection in the first vertical tube can be realized; This not only saves the Density Detection time, for the liquid-tight degree adjustment of subsequent well brings time enough, and saves the consumption of mixing drilling fluid, brings conveniently also to the sampling of manual detection density, and saves the confined space of marine drilling platform;
2. this detection architecture is external hanging type, does not need in drilling fluid tank perforate, and structure is simple, ensures the sealing performance of drilling fluid tank;
3. it for the mixing drilling fluid of various pressure, can accurately detect the density of the mixing drilling fluid of forward flow in main pipeline, does not need to carry out inversion specially and detects;
4. because this detection architecture carries out density measure to the mixing drilling fluid in main pipeline, this detection architecture is to the not requirement of the storage in drilling fluid tank, immediately the density of mixing drilling fluid can be detected, when the density of mixing drilling fluid adjusts, also not need the remaining drilling fluid in emptying drilling fluid tank.
Accompanying drawing explanation
Fig. 1 a is structural representation of the present utility model;
Fig. 1 b is the schematic top plan view of Fig. 1;
The perspective diagram of Fig. 1 c Fig. 1;
Fig. 2 is fluid density the utility model integral pressure contour display figure when being 1300kg/m3;
Fig. 3 is fluid density the first vertical tube vertical tangent plane pressure contour display figure when being 1300kg/m3;
Fig. 4 is fluid density the first vertical tube vertical tangent plane speed contour display figure when being 1300kg/m3;
Fig. 5 is fluid density the second vertical tube exit velocity polar plot when being 1300kg/m3.
Reference numeral
In accompanying drawing, 1 is main pipeline, 2 is Density Detection pipeline, 3 is gradiomanometer, 4 is sampling water tap, and A is for mixing drilling fluid is in main pipeline import, and D exports at main pipeline for mixing drilling fluid, B is the import of mixing drilling fluid at Density Detection pipeline, and C is the outlet of mixing drilling fluid at Density Detection pipeline.
Detailed description of the invention
See Fig. 1 a to Fig. 1 c, for a kind of preferred embodiment of mixing drilling fluid online Density Detection structure, comprise the main pipeline 1 in inverted L shape of mixing drilling fluid, described main pipeline 1 comprises horizontal main pipeline 1, vertical main pipeline 1, also comprise U-shaped Density Detection pipeline 2, gradiomanometer 3, described Density Detection pipeline 2 comprises the first vertical tube, second vertical tube and be connected to the first vertical tube, tube connector between second vertical tube lower end, the length of described first vertical tube is greater than the length of the second vertical tube, the upper end of described first vertical tube is communicated with horizontal main pipeline 1 by tube connector, described second vertical tube is communicated with vertical main pipeline 1 by tube connector, form integral structure.Described gradiomanometer 3 is arranged on Density Detection pipeline 2.In the present embodiment, described gradiomanometer 3 is arranged on the upper end of the first vertical tube, and upper pressure inductor, the downforce inductor of gradiomanometer 3 are all positioned at the first vertical tube.Also comprise sampling water tap 4, described sampling water tap 4 is arranged on tube connector.
Its detection technique principle is: when main pipeline 1 has fluid to flow through, Density Detection pipeline 2 will be diverted to, Density Detection pipeline 2 is that Length discrepancy " U " type Density Detection pipeline 2 designs, because the second vertical tube is shorter, second vertical tube fills fluid at first, produce the fluid that a phegma column pressure acts on the flowing in the first vertical tube, this back pressure can eliminate the negative pressure that fluid produces when the first vertical pipe flow, make the upper pressure inductor of the first vertical tube, downforce inductor correctly can read one group of data and send computing module to, after calculation procedure calculates, the density of now detected fluid will be demonstrated on a display screen.
As shown in Fig. 1 a to Fig. 1 c, the online Density Detection structure of mixing drilling fluid can adopt flange or anchor ear to connect on the mixer.
As shown in Figure 2, when adopting density to be 1300kg/m, the contour cloud atlas of whole tube wall place pressure, from then on figure can find out that whole tube wall place does not almost have negative pressure.
As shown in Figure 3, the contour cloud atlas of pressure of pressure inductor place pipeline vertical tangent plane, the pressure can learning pressure inductor from this figure on the occasion of, can normal induction pressure.
Not only can read the flowing velocity of fluid from Fig. 4, and can observe VELOCITY DISTRIBUTION, from then on figure can find out that, by after Density Detection pipeline 2, fluid can flow in main pipeline 1 smoothly, ensures to continue detection density.
Simplation verification: utilize the gambit Software on Drawing pipeline model of 1:1, and depict grid, adopts fluent software to carry out numerical simulation.The design has carried out the fluid that four simulations have employed four kinds of different densities altogether, and extracts the pressure in face, densometer place, the speed cloud atlas of entrance and speed vector figure.In order to the hydrostatic pressure that proves pressure inductor place on the occasion of, be also extracted static pressure value and the speed value of lower upper and lower two pressure sensors, refer to table 1, four times analog result is more consistent, for example is described when taking fluid density as 1300kg/m3.This meter reading further demonstrate that pressure inductor place static pressure on the occasion of.
Table 1 pressure inductor place's static pressure and speed value
| Static pressure value (pa) | Speed (m/s) | |
| Upper pressure inductor | 60144.6 | 3.7 |
| Downforce inductor | 71848.0 | 4.1 |
In above-described embodiment, utilize the second vertical tube fill liquid after the back pressure that produces to eliminate the negative pressure that fluid produces when the first vertical pipe flow be the key that hydrostatic pressure negative pressure is eliminated in the design of Length discrepancy " U " type Density Detection pipeline 2, from numerical simulation calculation result as accompanying drawing 2, 3, and pipeline vertical section does not have negative pressure yet, and the pressure of densometer pressure sensor place cross-section center point be also on the occasion of, second vertical tube back pressure elimination vacuum effect of " U " type pipe design is better, the impact of negative pressure is not subject to when can ensure gradiomanometer 3 detection density.
The pipeline that Density Detection pipeline 2 adopts diameter less ensure that fluid can fast in flow ipe, and detection density, the speed data that speed is as shown in Figure 4 ascended a height in figure and table 1 can be found out, the speed in fluid flows in pipes is fast.
Accompanying drawing 5 speed vector figure shows that the fluid in Density Detection pipeline 2 exit can flow to mixed charge road 1 smoothly and enter drilling fluid tank together after detecting.
The course of work: the end of the horizontal main pipeline 1 of this detection architecture is connected with mixing arrangement, the end of the vertical main pipeline 1 of this detection architecture is connected with drilling fluid tank,
When mixing drilling fluid flows out from mixing chamber, a stream part can be punished at Density Detection pipeline 2, first the second vertical tube of Density Detection pipeline 2 is filled, now the second vertical tube will produce a return pressure, act on the fluid in the first vertical tube, eliminate the negative pressure that fluid produces in the first vertical tube, after fluid submergence pressure inductor, pressure inductor experiences pressure will transmit data to computing module, the density of mixing drilling fluid will be demonstrated on the display screen as calculated, along with fluid flows in Density Detection pipeline 2, fluid in Density Detection pipeline 2 flow in drilling fluid tank together with also will flowing with mixed charge road 1 fluid, this process duration is very short, on-line checkingi density can be realized, directly can open sampling water tap 4 when needs manual detection density and take out sample direct-detection, dynamic kill-job gets rid of remaining mixing drilling fluid and cleaning seawater by water tap after having crept into.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model by above preferred embodiment, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from the utility model claims limited range.
Claims (5)
1. the online Density Detection structure of mixing drilling fluid, comprise the main pipeline in inverted L shape of mixing drilling fluid, described main pipeline comprises horizontal main pipeline, vertical main pipeline, it is characterized in that: also comprise U-shaped Density Detection pipeline, gradiomanometer, described Density Detection pipeline comprises the first vertical tube, second vertical tube and be connected to the first vertical tube, tube connector between second vertical tube lower end, the length of described first vertical tube is greater than the length of the second vertical tube, the upper end of described first vertical tube is communicated with horizontal main pipeline, described second vertical tube is communicated with vertical main pipeline, described gradiomanometer is arranged on Density Detection pipeline.
2. the online Density Detection structure of mixing drilling fluid according to claim 1, is characterized in that: described gradiomanometer is arranged on the upper end of the first vertical tube, and upper pressure inductor, the downforce inductor of gradiomanometer are all positioned at the first vertical tube.
3. the online Density Detection structure of mixing drilling fluid according to claim 1, is characterized in that: also comprise sampling water tap, and described sampling water tap is arranged on tube connector.
4. the online Density Detection structure of mixing drilling fluid according to claim 1, is characterized in that: described main pipeline, Density Detection pipeline are molded as one.
5. the online Density Detection structure of mixing drilling fluid according to claim 1, is characterized in that: the aperture of described Density Detection pipeline is less than the aperture of main pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520581198.7U CN205063867U (en) | 2015-08-04 | 2015-08-04 | Mix drilling fluid and detect structure at linear density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520581198.7U CN205063867U (en) | 2015-08-04 | 2015-08-04 | Mix drilling fluid and detect structure at linear density |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205063867U true CN205063867U (en) | 2016-03-02 |
Family
ID=55390435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520581198.7U Withdrawn - After Issue CN205063867U (en) | 2015-08-04 | 2015-08-04 | Mix drilling fluid and detect structure at linear density |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205063867U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019836A (en) * | 2015-08-04 | 2015-11-04 | 重庆科技学院 | Mixed drilling fluid online density detection structure |
| CN106568682A (en) * | 2016-11-03 | 2017-04-19 | 上海隧道工程有限公司 | Slurry balanced shield slurry density detecting device and detecting method |
-
2015
- 2015-08-04 CN CN201520581198.7U patent/CN205063867U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019836A (en) * | 2015-08-04 | 2015-11-04 | 重庆科技学院 | Mixed drilling fluid online density detection structure |
| CN106568682A (en) * | 2016-11-03 | 2017-04-19 | 上海隧道工程有限公司 | Slurry balanced shield slurry density detecting device and detecting method |
| CN106568682B (en) * | 2016-11-03 | 2019-04-02 | 上海隧道工程有限公司 | Slurry balance shield mud density detection device and its detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202330232U (en) | Device for testing permeability coefficient of pervious concrete | |
| CN106644385B (en) | Surface water and underground water subsurface flow exchange self-circulation test device and use method | |
| CN101392638B (en) | Simulating device for solid-state mining experiment of gas hydrate | |
| CN104776971A (en) | Visualization experiment device for liquid and sand carrying of gas flow | |
| CN105021485A (en) | Undisturbed soil scouring test system | |
| CN201284651Y (en) | Solid-state exploitation experiment simulating device for natural gas hydrate | |
| CN107271328A (en) | A kind of polymer solution anti-shear performance evaluating apparatus and method | |
| CN205063867U (en) | Mix drilling fluid and detect structure at linear density | |
| Cihat Tuna et al. | Experimental investigations of aeration efficiency in high-head gated circular conduits | |
| CN205280701U (en) | Defeated defoaming evaluation device of natural gas collection | |
| CN105675444B (en) | A kind of three pipe series parallel type plastic fluid funnel viscosity On-line Measuring Methods | |
| CN108801583A (en) | A kind of flow field in goaf analog simulation experimental device | |
| CN205400698U (en) | Automatic filling system of defoaming agent | |
| CN200982915Y (en) | A hydrodynamic integrated experimental device | |
| CN105256860A (en) | Pressure-superposed water supply pressure-stabilized tank and method for measuring gas missing amount | |
| CN207336288U (en) | A kind of slurry density measurement device | |
| CN204666329U (en) | A kind of air-flow is taken liquid and is taken sand visual experimental apparatus | |
| CN205607469U (en) | Experimental device for utilize minor diameter pipeline flowmeter to calculate major diameter pipeline flow | |
| CN109994021B (en) | Laminar flow physical simulation test water tank system capable of simulating background flow velocity | |
| CN105019836A (en) | Mixed drilling fluid online density detection structure | |
| CN202921185U (en) | Emulsified liquid ratio and concentration detection device | |
| CN106644387B (en) | Inner wall of the pipe frictional resistant coefficient test device and test method under unsteady flow | |
| CN209942808U (en) | Oil-water well tracing and medicine-filling regulating control device | |
| CN204612703U (en) | A kind of seepage monitoring device of seepage monitoring district | |
| CN204988956U (en) | Yellow river pai shadong silt content measurement system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160302 Effective date of abandoning: 20180619 |
|
| AV01 | Patent right actively abandoned |