CN202596619U - Rectangular tank type measuring device of drilling fluid returning flow - Google Patents
Rectangular tank type measuring device of drilling fluid returning flow Download PDFInfo
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- CN202596619U CN202596619U CN 201220222560 CN201220222560U CN202596619U CN 202596619 U CN202596619 U CN 202596619U CN 201220222560 CN201220222560 CN 201220222560 CN 201220222560 U CN201220222560 U CN 201220222560U CN 202596619 U CN202596619 U CN 202596619U
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- drilling fluid
- liquid level
- measuring device
- optical liquid
- rectangular tank
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Abstract
The utility model relates to a rectangular tank type measuring device of drilling fluid returning flow. The measuring device is composed of an optical liquid level sensor, a rectangular tank, a signal conditioning and preprocessing device, a data acquisition unit, a client computer and an acousto-optic alarming device. The optical liquid level sensor is installed on a sensor support installed on a support slide rail, and the optical liquid level sensor, the signal conditioning and preprocessing device, the data acquisition unit, the client computer and the acousto-optic alarming device are sequentially connected. According to the measuring device, the existing onsite devices are not required to be changed, and the rectangular tank commonly used by a drilling crew can be used for measuring flow in real time in a drilling fluid returning pipeline. The measuring device is high in detection accuracy, capable of achieving early warning and capable of effectively preventing blowout accidents.
Description
One, technical field:
The utility model relates in drilling well and measure the technology that outflow is returned in outlet in the detection range with boring, what be specifically related to is that rectangle slot type drilling fluid returns the outflow measurement mechanism.
Two, background technology:
If strata pressure the phenomenon that formation fluid is invaded well will occur greater than drilling liquid pressure in the well in the petroleum gas resource drilling process, be called overflow, will cause blowout even out of hand if deal with improperly, cause pernicious security incident.The key of prevention blowout and blowout out of control is exactly in time to find overflow, and the device of coherent detection overflow is made early warning fast and accurately, finds overflow more early, and the difficulty of handling overflow is also more little, and the probability that blowout takes place is just low more.
The overflow detection method of situ of drilling well widespread usage has two kinds, is respectively drilling fluid pot liquid-level detecting method and difference in flow method.
(1) drilling fluid pot liquid-level detecting method
This overflow detection method is used the most general at present.This method changes through liquid level in observation or the measuring drilling fluid pond estimates the total amount of liquid increase and decrease, has judged whether the formation fluid intrusion.Connect for returning out pipeline but adopt between this method well head and the drilling fluid pot, the about 4 ~ 10m of length is when overflow takes place; The borehole fluid flow begins to increase, and returns out pipeline to drilling fluid pot and accumulates but need flow through, and this needs certain hour; That is to say; Begin during the drilling fluid pot dilatation reaches high alarm setting, can not send the overflow early warning from overflow, the overflow pre-warning time is postponed greatly, does not have the effect of early warning.
(2) difference in flow method
This method is measured or is calculated to pump in the well and judges whether to occur overflow and leakage with the drilling well liquid measure difference that recycles well, and difference takes place for overflow just is described, difference takes place for negative explanation leakage, and accuracy of detection is higher than drilling fluid pot Level Detection method.The drilling fluid displacement that pumps in the well is easy to because of the strokes per minute metering; So going into well drilling well liquid measure obtains easily; And the mud flow rate that recycles well when measuring drilling fluid must be full of pipe and be formed with the pressure pipeline; In the pipe free surface can not be arranged in other words; This is to be determined by electromagnetic flowmeter or coriolis mass flowmeters operating principle, but the drilling fluid displacement difference of in whole drilling process, using owing to the different stages of creeping into is huge, so can't guarantee that drilling fluid is full of pipe all the time in the whole drilling process.
More than two kinds of methods that detect overflows all have certain defective, a large amount of blowout cases in nearly ten years have proved also that existing overflow detection means need be improved and are perfect that the early detection overflow is reduced to the risk that blowout takes place minimum.
Three, summary of the invention:
The purpose of the utility model provides rectangle slot type drilling fluid and returns the outflow measurement mechanism, and it is used to solve existing drilling fluid and returns outflow and measure inaccurate problem.
The utility model solves the technical scheme that its technical problem adopted: this rectangle slot type drilling fluid returns the outflow measurement mechanism and is made up of Optical Liquid Level Sensors, rectangular channel, signal condition and pretreatment unit, data acquisition unit, client computer, acoustic-optic alarm; Optical Liquid Level Sensors is installed on the sensor stand, and sensor stand is installed on the frame sliding track; Optical Liquid Level Sensors, signal condition are connected with pretreatment unit, data acquisition unit, client computer, acoustic-optic alarm successively.
Optical Liquid Level Sensors is erected on the sensor stand at about 20 ~ 30cm place, rectangular channel top in the such scheme.
Beneficial effect:
1, the utility model need not change the well site existing weaponry and equipment; The rectangular channel drilling fluid that drilling crew generally uses returns out in the pipeline just can measure flow in real time; Just can realize that in the conventional drilling equipment overflow of difference in flow method detects; Compare pre-warning time with drilling fluid pot Level Detection method and shift to an earlier date significantly, accuracy of detection significantly improves, and can give more plenty of time closing well of situ of drilling well staff; Effectively prevent gas blowout accident and take place, also can monitor leakage when this utility model detects overflow in real time and whether take place.
2, the utility model is measured through Optical Liquid Level Sensors and is measured certain constant cross-section liquid level in the rectangular channel, does not contact with drilling fluid, avoids that solid phase influences certainty of measurement in the drilling fluid.
3, the utility model has solved the difference in flow method and measures flow and need drilling fluid to return out pipeline to be necessary for pipe, and is full of pipe and is formed with the restricted problem of pressing pipeline.
Four, description of drawings:
Fig. 1 the utility model measurement mechanism structural representation.
1 rectangular channel, 2 horn mouths window drilling fluid liquid level 4 sensor stand 5 Optical Liquid Level Sensors, 6 signal conditions and pretreatment unit 7 data acquisition units 8 client computers 9 sound and light alarm lamps 10 horn mouths 11 annular preventers 12 rig floor planes 13 kelly bars in 3 rectangular channels
Five, the specific embodiment:
Below in conjunction with accompanying drawing the utility model is done further explanation:
As shown in Figure 1; This rectangle slot type drilling fluid returns the outflow measurement mechanism and is made up of high-precision optical liquid level sensor 5, rectangular channel 1, signal condition and pretreatment unit 6, digital data transmission bus, data acquisition unit 7, client computer 8, acoustic-optic alarm; At the on-the-spot drilling fluid open type of oil drilling circulation time; Returning outflow measures and mostly to be to be provided with at the well head place horn mouth 10 and annular preventer 11; Horn mouth 10 and annular preventer 11 are below rig floor plane 12, and kelly bar 13 passes from horn mouth 10, and rectangular channel 1 just drilling fluid returns out the rectangular channel pipeline; Drilling fluid liquid level 3 is free surfaces in the rectangular channel, and rectangular channel 1 and horn mouth are windowed and 2 communicated.The utility model need not change the well site existing weaponry and equipment, high-precision optical liquid level sensor 5 is erected on the sensor stand 4 at about 20 ~ 30cm place, rectangular channel 1 top, measures in order to avoid drilling fluid splashes influence, and sensor stand 4 is installed on the frame sliding track; Signal condition and pretreatment unit 6, digital data transmission bus, data acquisition unit 7, client computer 8 are connected according to known technology, and acoustic-optic alarm is a sound and light alarm lamp 9.
Between the measurement zone in the utility model rectangular channel, with the horn mouth junction of windowing be starting point, get and be measuring point between (1/5 ~ 1/2) L, wherein L is a rectangular channel length.
This rectangle slot type drilling fluid returns the outflow measurement mechanism and measures auxiliary variables such as liquid level through high-precision optical liquid level sensor 5 in real time; Output simulation auxiliary variable signal is to signal condition and pretreatment unit 6; To simulation auxiliary variable signal amplify, completely cut off, preliminary treatment such as filtering, computing, behind signal condition and pretreatment unit 6, export digital auxiliary variable signal.Data acquisition unit 7 connects through bus, gathers digital auxiliary variable signal in real time, and imports the auxiliary variable data to client computer 8 through the client computer interface.The auxiliary variable data calculate drilling fluid through client computer 8 and return outflow Q value.Whether last client computer reaches high alarm setting according to the Q value is carried out whether start sound and light alarm lamp 9.
Claims (2)
1. a rectangle slot type drilling fluid returns the outflow measurement mechanism; It is characterized in that: this rectangle slot type drilling fluid returns the outflow measurement mechanism and is made up of Optical Liquid Level Sensors (5), rectangular channel (1), signal condition and pretreatment unit (6), data acquisition unit (7), client computer (8), acoustic-optic alarm; Optical Liquid Level Sensors (5) is installed on the sensor stand (4), and sensor stand (4) is installed on the frame sliding track; Optical Liquid Level Sensors (5), signal condition are connected with pretreatment unit (6), data acquisition unit (7), client computer (8), acoustic-optic alarm successively.
2. rectangle slot type drilling fluid according to claim 1 returns the outflow measurement mechanism, it is characterized in that: described Optical Liquid Level Sensors (5) is erected on the sensor stand (4) at about 20 ~ 30cm place, rectangular channel (1) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220222560 CN202596619U (en) | 2012-05-17 | 2012-05-17 | Rectangular tank type measuring device of drilling fluid returning flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220222560 CN202596619U (en) | 2012-05-17 | 2012-05-17 | Rectangular tank type measuring device of drilling fluid returning flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202596619U true CN202596619U (en) | 2012-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220222560 Expired - Fee Related CN202596619U (en) | 2012-05-17 | 2012-05-17 | Rectangular tank type measuring device of drilling fluid returning flow |
Country Status (1)
| Country | Link |
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| CN (1) | CN202596619U (en) |
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 |
| CN108106691A (en) * | 2018-02-05 | 2018-06-01 | 卡川尔流体科技(上海)有限公司 | A kind of novel liquid level installing mechanism |
-
2012
- 2012-05-17 CN CN 201220222560 patent/CN202596619U/en not_active Expired - Fee Related
Cited By (3)
| 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 |
| CN108106691A (en) * | 2018-02-05 | 2018-06-01 | 卡川尔流体科技(上海)有限公司 | A kind of novel liquid level installing mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20130517 |