CN204851236U - It spouts conversion alarm system to be used for boring stratum hourglass of many pressure systems of chance - Google Patents
It spouts conversion alarm system to be used for boring stratum hourglass of many pressure systems of chance Download PDFInfo
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- CN204851236U CN204851236U CN201520175095.0U CN201520175095U CN204851236U CN 204851236 U CN204851236 U CN 204851236U CN 201520175095 U CN201520175095 U CN 201520175095U CN 204851236 U CN204851236 U CN 204851236U
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- liquid level
- alarm host
- computer
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Abstract
The utility model discloses an it spouts conversion alarm system to be used for boring stratum hourglass of many pressure systems of chance, it includes liquid level detection instrument (1), telegraph key (2), power (3), computer (4) and alarm host computer (5), alarm host computer (5), telegraph key (2), power (3) establish ties and constitute closed -loop, alarm host computer (5) are connected with liquid level detection instrument (1) and computer (4) are electric respectively, computer (4) on install and lou spout the conversion and calculate software, directly calculate behind input essential data and lou spout the conversion liquid level to feed back to alarm host computer (5) with here liquid face value through the liquid level signal line, and as the alarming line of alarm host computer. The beneficial effects of the utility model are that: easily realize, reliably spend high, construction convenience, leak the accuracy in computation height that spouts the conversion liquid level, it is convenient quick.
Description
Technical field
The utility model relates to oil/gas drilling drilling strata generation drain spray switch technology field, particularly a kind of for boring chance multiple pressure Force system stratum drain spray conversion warning system.
Background technology
Increase oil and gas production, carry out Oil And Gas Exploration And Development efficiently and safely and always be the huge challenge that petroleum industry faces.Along with the constantly dark people of Oil And Gas Exploration And Development, employ based on the difficulty of extensive low-grade petroleum resources and bad ground the emphasis that petroleum resources becomes oil-gas exploration and development gradually, the difficulty of drilling well is also increasing.Particularly in drilling process, the change of drilling strata pressure is irregular, during the multiple pressure Force system stratum that low high pressure zone replaces, by the restriction of casing programme, separated for each intermediate zone, thus cannot often occur in drilling process that overflow, leakage or both simultaneous drain sprays are with the complicated downhole conditions of depositing.When particularly straight well bores and meets multiple pressure Force system stratum, due to the stratum piercing crack, hole is grown; Head of liquid is greater than formation fracture pressure by formation breakdown; Running speed is too fast, causes pressure excited; Pierce subnormal pressure stratum etc. and all may cause leakage.Leakage makes drilling liquid in pit shaft decline, and this will cause the effective head of liquid acted on high pressure zone position to decline, and when effective head of liquid is less than the strata pressure of certain high pressure zone position, this high pressure zone fluid will inevitably be caused to enter pit shaft.This phenomenon causing high-pressure formation fluid to enter pit shaft due to drilling fluid leakage is called that drain spray is changed.The drilling liquid of its correspondence is drain spray conversion liquid level.Accurately learn that drain spray conversion is significant to understanding underground working: drain spray does not occur and changes front down-hole and only leakage occurs, should leaking-stopping measure in time; After there is drain spray conversion, down-hole is that existing leakage has again the spray of overflow to leak with depositing situation, and this carries out kill-job measure while requiring leak stopping.But current technology accurately can not learn when drain spray conversion occurs, and this causes well control difficulty, formation damage, prolongation drilling period, increases drilling cost.
At present, straight well is bored and meets the situation that leakage occurs on multiple pressure Force system stratum, particularly severe leakage, in pit shaft, drilling liquid declines fast, may drop to below drain spray conversion liquid level very soon, now in pit shaft, leakage and overflow coexist, but, on-the-spot according to only Slot Handling occurring: the leakage particularly severe leakage that wastage is greater than 5 cubes ms/h to occur, should organize immediately and pull out of hole by force, huge discharge continuous irrigation drilling fluid, trips out rear according to leakage situation formulation leaking-stopping measure.Can only reach plugging effect like this, overflow layer fluid constantly enters pit shaft, causes the well kick even serious accident such as blowout, produces serious consequence.
Utility model content
The purpose of this utility model is the shortcoming overcoming prior art, provides a kind of and is easy to realization, reliability is high and quick and precisely can learn that the brill that drain spray conversion occurs meets multiple pressure Force system stratum drain spray conversion warning system and method thereof.
The purpose of this utility model is achieved through the following technical solutions: a kind of for boring chance multiple pressure Force system stratum drain spray conversion warning system, it comprises liquid level detecting instrument, telegraph key, power supply, computer and alarm host machine, described alarm host machine, closed-loop path in series between telegraph key and power supply, described alarm host machine is electrically connected with liquid level detecting instrument and computer respectively.
Described computer is provided with drain spray conversion software for calculation.
Described liquid level detecting instrument is arranged on the position that well head can record liquid level in pit shaft in real time, and Real-time Feedback is to alarm host machine.
The utility model has the following advantages:
1, the utility model is when straight well bores chance multiple pressure Force system stratum generation leakage, can by liquid level position Real-time Feedback in well to alarm host machine, drain spray conversion alarm occurs promptly and accurately, there is the effect reducing down-hole risk, and the utility model is easy to realize, reliability is high, easy construction.
2, computer of the present utility model is provided with drain spray conversion liquid level software for calculation, avoid much loaded down with trivial details artificial calculating, and the degree of accuracy is high, fast and easy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is multiple pressure Force system stratum of the present utility model drain spray transition diagram;
In figure, 1-liquid level detecting instrument, 2-telegraph key, 3-power supply, 4-computer, 5-alarm host machine.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described; protection domain of the present utility model is not limited to the following stated: as shown in Figure 1; a kind of for boring chance multiple pressure Force system stratum drain spray conversion warning system; it comprises liquid level detecting instrument 1, telegraph key 2, power supply 3, computer 4 and alarm host machine 5; described alarm host machine 5, closed-loop path in series between telegraph key 2 and power supply 3, described alarm host machine 5 is electrically connected with liquid level detecting instrument 1 and computer 4 respectively.
In the present embodiment, described computer 4 is provided with drain spray conversion liquid level software for calculation, drain spray conversion liquid level is directly calculated after input basic data, by liquid level signal line, this fluid value is fed back to alarm host machine 5, and as the alarming line of alarm host machine, liquid level detecting instrument 1 is arranged on the position that well head can record liquid level in pit shaft in real time, and Real-time Feedback is to alarm host machine 5, after alarm host machine 5 processes, when finding that in pit shaft, liquid level is lower than alarming line, alarm host machine 5 is sounded warning, inform that missing and the same situation of depositing of overflow has appearred in technician down-hole, kill-job should be noted while leak stopping.
In the present embodiment, as shown in Figure 2, spray conversion liquid level computational methods are further described with the software for calculation write: bore for straight well and meet the situation that leakage occurs on multiple pressure Force system stratum, leakage makes drilling liquid in pit shaft decline, this declines causing the effective head of liquid acted on high pressure zone position, when effective head of liquid is less than the strata pressure of certain high pressure zone position, this high pressure zone fluid will inevitably be caused to enter pit shaft.This phenomenon causing high-pressure formation fluid to enter pit shaft due to drilling fluid leakage is called that drain spray is changed, and the drilling liquid of its correspondence is drain spray conversion liquid level, and its discrepancy in elevation to well head is designated as L (unit: m).As shown in Figure 2, wherein high pressure formation one and high pressure formation two are two representatives in multiple high pressure formation to multiple pressure Force system stratum drain spray transition diagram.Liquid level is dropped to corresponding drilling liquid when certain high pressure zone is about to overflow occurs and be called the overflow critical level of this high pressure zone, its discrepancy in elevation to well head is designated as Y
i(unit: m).
In liquid level decline process, there is its overflow liquid level of high pressure zone position i Y of movable fluid for certain
i, surface casing pressure, relation equation between head of liquid and strata pressure:
P
a+0.0098ρ
mh
i＝P
i(1)
Y
i＝H
i-h
i(2)
Associating (1), (2) can obtain:
P in formula
a-surface casing pressure, MPa;
P
ithe strata pressure of-stratum i, MPa;
ρ
m-drilling fluid density, g/cm
3;
H
irequired liquid-column height when-stratum i is about to overflow occurs, m;
Y
ithe overflow critical level of-stratum i, m;
H
i-stratum i the degree of depth, m.
Reusability can obtain the overflow critical level of each high pressure formation by (3) formula, and wherein minimum value is drain spray conversion liquid level.Therefore according to the drain spray conversion liquid level software for calculation that above-mentioned thought is write, accurately can calculate drain spray conversion liquid level fast, after input basic data, just directly calculate drain spray conversion liquid level by drain spray conversion page software for calculation.
Claims (2)
1. meet multiple pressure Force system stratum drain spray conversion warning system for boring for one kind, it is characterized in that: it comprises liquid level detecting instrument (1), telegraph key (2), power supply (3), computer (4) and alarm host machine (5), described alarm host machine (5), closed-loop path in series between telegraph key (2) and power supply (3), described alarm host machine (5) is electrically connected with liquid level detecting instrument (1) and computer (4) respectively.
2. one according to claim 1 meets multiple pressure Force system stratum drain spray conversion warning system for boring, it is characterized in that: described liquid level detecting instrument (1) is arranged on the position that well head can record liquid level in pit shaft in real time, and Real-time Feedback is to alarm host machine (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520175095.0U CN204851236U (en) | 2015-03-26 | 2015-03-26 | It spouts conversion alarm system to be used for boring stratum hourglass of many pressure systems of chance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520175095.0U CN204851236U (en) | 2015-03-26 | 2015-03-26 | It spouts conversion alarm system to be used for boring stratum hourglass of many pressure systems of chance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204851236U true CN204851236U (en) | 2015-12-09 |
Family
ID=54741794
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520175095.0U Expired - Fee Related CN204851236U (en) | 2015-03-26 | 2015-03-26 | It spouts conversion alarm system to be used for boring stratum hourglass of many pressure systems of chance |
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| Country | Link |
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| CN (1) | CN204851236U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747172A (en) * | 2015-03-26 | 2015-07-01 | 西南石油大学 | Leakage spray conversion alarm system used for drilling meeting multi-pressure system stratums and method thereof |
| CN107060747A (en) * | 2017-06-02 | 2017-08-18 | 中国石油天然气股份有限公司 | Early warning method and system for crack development zone during drilling |
-
2015
- 2015-03-26 CN CN201520175095.0U patent/CN204851236U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747172A (en) * | 2015-03-26 | 2015-07-01 | 西南石油大学 | Leakage spray conversion alarm system used for drilling meeting multi-pressure system stratums and method thereof |
| CN107060747A (en) * | 2017-06-02 | 2017-08-18 | 中国石油天然气股份有限公司 | Early warning method and system for crack development zone during drilling |
| CN107060747B (en) * | 2017-06-02 | 2020-12-01 | 中国石油天然气股份有限公司 | Early warning method and system for crack development zone during drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20190326 |
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| CF01 | Termination of patent right due to non-payment of annual fee |