CN203117806U - Main pressure control device of universal rotating blowout preventer control system - Google Patents
Main pressure control device of universal rotating blowout preventer control system Download PDFInfo
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- CN203117806U CN203117806U CN 201320045251 CN201320045251U CN203117806U CN 203117806 U CN203117806 U CN 203117806U CN 201320045251 CN201320045251 CN 201320045251 CN 201320045251 U CN201320045251 U CN 201320045251U CN 203117806 U CN203117806 U CN 203117806U
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- pressure
- pid controller
- main pressure
- control
- overflow valve
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Abstract
A main pressure control device of a universal rotating blowout preventer control system comprises includes a PID controller, an amplifier and a proportional overflow valve. A signal input interface of the PID controller is connected with a wellbore pressure sensor and a main pressure sensor; a signal output interface of the PID controller is connected in series with the amplifier and thereafter is connected with a control end of the proportional overflow valve; a pressure compensating port X of a variable pump which provides main pressure is communicated with an oil inlet of the proportional overflow valve; an oil outlet of the proportional overflow valve is connected to an oil return tank; the PID controller is provided with an RS485 interface which is connected with a data input screen; the PID controller adopts a control target value which is the result of wellbore pressure from the wellbore pressure sensor plus a preset pressure differential pressure as a control signal to adjust the open/close degrees of the proportional overflow valve, such that the main pressure can be controlled; and the PID controller compares main pressure real time signals fed back by the main pressure sensor with the control target value so as to enable the main pressure to reach or to be kept as the set control target value, such that precise control of the main pressure can be realized.
Description
Technical field
The utility model is relevant with the omnipotent rotary blowout preventer control system in underbalance and the controlled pressure drilling, is the principal pressure control device in this system.
Background technology
Omnipotent rotary blowout preventer system is one of key equipment in underbalance and the controlled pressure drilling, mainly is made up of omnipotent rotary blowout preventer and hydraulic control system, plays the effect to the well head sealing in drilling process.Hydraulic control system provides a principal pressure for omnipotent rotary blowout preventer, and the glue core of omnipotent rotary blowout preventer is initiatively held well head tightly under the promotion of principal pressure drilling rod seals.In drilling process, principal pressure must be followed the wellbore pressure variation and be changed the positiver sealing that could guarantee well head.The principal pressure that hydraulic control system provides is from the pressure compensation type variable output pump, and the size of principal pressure depends on the pressure of variable output pump pressure compensation mouth (X mouth).The pressure of pressure compensation mouth (X mouth) adopts the pilot-operated type surplus valve to control at present, its principle of work is: gather wellbore pressure in position with the wellbore pressure sensor, this wellbore pressure is added that default pressure reduction inserts the control end of pilot-operated type surplus valve, as the preset value of pilot-operated type surplus valve; The pilot-operated type surplus valve is converted to the force value of X mouth according to certain area ratio with preset value, changes and changes thereby control the size of principal pressure and make principal pressure follow wellbore pressure.Above-mentioned pressure reduction pressure is to require to set up on their own within the specific limits according to drilling well.Whole control process, wellbore pressure signal and pressure reduction pressure signal sum are input signal, the pilot-operated type surplus valve is for carrying out link.
Above-mentioned pilot-operated type surplus valve is controlled the mode of principal pressure, changes though can realize principal pressure to follow the wellbore pressure variation and also can use the realization of pressure reduction pressure to the adjusting of principal pressure, and there have been a lot of weak points in this regulative mode.At first, because dynamic, the bad response of pilot-operated type surplus valve, pilot-operated type surplus valve pressure regulating error is big, sometimes even reforming phenomena occurs.Secondly, the motion of pilot-operated type relief valve spool is subjected to the influence of frictional resistance, occurs the blank operation phenomenon in control procedure easily, namely taken place under the situation of change at wellbore pressure, and principal pressure is not followed variation.Moreover owing to do not have feedback element in the control procedure, the adjusting of principal pressure relies on manual control fully, and operation is inconvenience very.
Summary of the invention
In order to solve that the principal pressure regulating error that omnipotent rotary blowout preventer system occurs is big, response is untimely and weak points such as inconvenient operation, the utility model proposes a kind of principal pressure control device and replace the control effect that original pilot-operated type surplus valve improves principal pressure.
The technical solution of the utility model is: a kind of principal pressure control device of omnipotent rotary blowout preventer control system, it is characterized in that this device comprises PID controller, amplifier and proportional pressure control valve, the signal input interface of PID controller connects wellbore pressure sensor and primary pressure sensor, the signal output interface of PID controller is connected in series and is connected to the control end of proportional pressure control valve behind the amplifier, provide the pressure compensation mouth X mouth of the variable output pump of principal pressure to be communicated with the oiler of proportional pressure control valve, the oil-out of proportional pressure control valve is connected to oil-recovery tank.
The PID controller should be provided with the RS485 interface and be connected with data entry screen.
Principle of work of the present utility model is: the PID controller wellbore pressure of artesian well barrel pressure pickup in the future adds that default pressure reduction pressure is as the control desired value of principal pressure, and send into amplifier and amplify proportional pressure control valve is regulated in the back as control signal switching degree, and then the pressure of the pressure compensation mouth X mouth of control variable pump, reach the purpose of controlling principal pressure.The PID controller compares principal pressure live signal and the control desired value of primary pressure sensor feedback, then comparative result is used for calculating new control signal, further regulate the switching degree of proportional pressure control valve, allow principal pressure reach or remain on the control desired value of setting, realize the accurate control to principal pressure.
Technique effect of the present utility model is embodied in: solved problems such as the principal pressure error is big, response is untimely, the reliability and the security that improve control system of preventer; Because accurately steadily controlling of principal pressure reduced vibrations and the noise of control system of preventer, the life-span of having improved Hydraulic Elements such as variable output pump, operation valve; Can increase monitoring software and data recording function, principal pressure is regulated operation and is become convenient and reliable.
Description of drawings
Accompanying drawing is hydrostatic control synoptic diagram of the present utility model.
Embodiment
See the utility model embodiment shown in the drawings, a kind of principal pressure control device of omnipotent rotary blowout preventer control system, this device comprises PID controller 1, amplifier 2 and proportional pressure control valve 3, the signal input interface of PID controller 1 connects wellbore pressure sensor 4 and primary pressure sensor 5 by signal wire, the signal output interface of PID controller 1 is connected in series and is connected to the control end of proportional pressure control valve 3 behind the amplifier 2, the control signal of PID controller 1 output is amplified rear drive proportional pressure control valve 3 through amplifier 2 and is regulated the switching degree, the pressure compensation mouth that the variable output pump 6 of principal pressure is provided is the oiler that the X mouth is communicated with proportional pressure control valve 3, and the oil-out of proportional pressure control valve 3 is connected to oil-recovery tank 8.
Claims (2)
1. the principal pressure control device of an omnipotent rotary blowout preventer control system, it is characterized in that this device comprises PID controller, amplifier and proportional pressure control valve, the signal input interface of PID controller connects wellbore pressure sensor and primary pressure sensor, the signal output interface of PID controller is connected in series and is connected to the control end of proportional pressure control valve behind the amplifier, provide the pressure compensation mouth X mouth of the variable output pump of principal pressure to be communicated with the oiler of proportional pressure control valve, the oil-out of proportional pressure control valve is connected to oil-recovery tank.
2. the principal pressure control device of omnipotent rotary blowout preventer control system according to claim 1 is characterized in that the PID controller is provided with the RS485 interface and is connected with data entry screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320045251 CN203117806U (en) | 2013-01-28 | 2013-01-28 | Main pressure control device of universal rotating blowout preventer control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320045251 CN203117806U (en) | 2013-01-28 | 2013-01-28 | Main pressure control device of universal rotating blowout preventer control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203117806U true CN203117806U (en) | 2013-08-07 |
Family
ID=48898135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320045251 Expired - Lifetime CN203117806U (en) | 2013-01-28 | 2013-01-28 | Main pressure control device of universal rotating blowout preventer control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203117806U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704276A (en) * | 2017-01-25 | 2017-05-24 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic fan driving system |
| CN109116878A (en) * | 2018-11-12 | 2019-01-01 | 美钻深海能源科技研发（上海）有限公司 | The Closed-loop pressure control system of rotating blowout preventer |
| CN109267959A (en) * | 2018-11-29 | 2019-01-25 | 美钻深海能源科技研发（上海）有限公司 | The ram preventer and its blowout prevention method of position holding function is automatically closed in a kind of band |
-
2013
- 2013-01-28 CN CN 201320045251 patent/CN203117806U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704276A (en) * | 2017-01-25 | 2017-05-24 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic fan driving system |
| CN109116878A (en) * | 2018-11-12 | 2019-01-01 | 美钻深海能源科技研发（上海）有限公司 | The Closed-loop pressure control system of rotating blowout preventer |
| CN109267959A (en) * | 2018-11-29 | 2019-01-25 | 美钻深海能源科技研发（上海）有限公司 | The ram preventer and its blowout prevention method of position holding function is automatically closed in a kind of band |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130807 |