AU2009354568A1 - Multi-level refined throttle manifold and automatic control system - Google Patents
Multi-level refined throttle manifold and automatic control system Download PDFInfo
- Publication number
- AU2009354568A1 AU2009354568A1 AU2009354568A AU2009354568A AU2009354568A1 AU 2009354568 A1 AU2009354568 A1 AU 2009354568A1 AU 2009354568 A AU2009354568 A AU 2009354568A AU 2009354568 A AU2009354568 A AU 2009354568A AU 2009354568 A1 AU2009354568 A1 AU 2009354568A1
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- AU
- Australia
- Prior art keywords
- choke
- pressure
- drop
- manifold
- automatic control
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims description 19
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
- E21B34/025—Chokes or valves in wellheads and sub-sea wellheads for variably regulating fluid flow
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
- Flow Control (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A multi-level refined throttle manifold and an automatic control system are provided. The multi-level refined throttle manifold system is composed of multiple plate valves and a throttle valve that are connected in parallel. The automatic control system enables micro-adjustment of wellhead return pressure under different pressure grades through starting and closing the different plate valves, and through adjusting the throttle valves continuously. Automatic control system implements bumpless switching for the process of adjusting opening degree of the valves in order to make the process of adjusting wellhead return pressure fast and smooth.
Description
Multi-level precise choke manifold and automatic control system Technical Field The present invention refers to an automatic control of the oil-gas exploration and development, especially refers to a precise automatic control system on choke pressure in the oil-gas well drilling. Background of the Invention In engineering of the oil-gas exploration and development, with the broadening of the field of the oil-gas exploration and the technological advances, the requirements of control technology on wellhead back pressure have been greatly increased during the drilling course. On one hand, using methods of near or under balance pressure drilling can protect the reservoir, effectively reduce the damage of drilling fluids to the reservoir, reduce or overcome the effect of pressure difference on drilling rate, effectively reduce the composite cost of developing oil-gas well, greatly increase the rate of mechanical penetration and the success probability about oil-gas well drilling; on the other hand, when drilling the formation in which the mud density window is very narrow or even near zero, in order to ensure successful drilling it must be required that the equivalent circulating density of wellbore annulus should be keep constant during the entire process of drilling. In the drilling process it must be guaranteed that whether the normal-drilling or the connection and the trip-drilling, the wellhead back pressure can be adjusted in tune to the construction requirement smoothly and quickly and keep steady. However, the existing choke manifold systems of the pressure well all use the structure form in which multiple valves are in series connection. During choke control, this structure form must request that the back flow of drilling fluid passes through all the valves and the choke pressure is controled by controlling the opening degree of choke valve. But the linear regulation region is very narrow because the adjustment accuracy and intensity of the choke valve appear serious non-linear character in relative opening degree range (0-100%), so that it is difficult to control the adjust accuracy of the choke valve under large flow conditions and large flow can make serious erosion to the choke valve, which makes the choke valve easily broken. down. Summary of the Invention The object of present invention is to provide a choke control system which can adjust wellhead back pressure in the range of different pressure control level precisely and proceed undisturbed switch between different pressure level, thereby during the whole process of drilling at various operating conditions, the equivalent circulating density of drilling fluids in the wellbore annulus can be kept constant, and the safe drilling under the formation condition of a narrow pressure window becomes possible. In order to achieve above objects, the present invention provides one kind of multi-level precise choke manifold and automatic control system, which includes a set of ground choke manifold system and automatic control system, wherein three plate valves and one choke valve form the choke manifold system through parallel connection. The said multi-level precise choke manifold and automatic control system consists of a pressure sensor used to measure inlet pressure of choke manifold, 3 a displacement sensor used to measure the opening degree of choke valve, a flow meter used to measure the outlet flow of choke valve, sensors used to determine switch state of each plate valve, a device used to filter-amplified various signals and A/D conversion, a device which transmits signals after filter-amplified and A/D conversion to a cabinet and an engineer station, a device used to save and display data, and an automatic control device. The automatic control device calculate and issue control instructions according to current operating state of pipeline and back-pressure pump, proceed the action and speed operation to the switch of plate valve and the opening degree of choke valve based on the steps of choke control process at all levels, thus realize wellhead choke back-pressure. Preferably, said device used to save and display data employs standard industrial control computer, in which the data bus is connected with the controller, a perfect computer monitoring interface is programmed in a host computer, all parameters can be displayed in host computer so that operators can control the whole control-pressure drilling device through monitoring interface. Preferably, said automatic control device employs standard control cabinet in which electrical elements including a controller module, a bus module, an 1/0 module, a relay, a safety barrier, an isolated barrier, a ground tenninal array etc are installed, the electrical elements mainly realize functions of setting power distribution in the control system,. signals importation, exportation and isolation, and so on. In the operation of present system, according to the requirement of different pressure control level and precision, the system determines and chooses the switch state of each plate valve corresponding to certain pressure control level, then 4 precisely adjust required value of wellhead back pressure by controlling the opening degree size of choke valve corresponding to certain choke flow channel, which results in that the precision of controlling wellhead back pressure is greatly increased. In the operation of present system, precise adjustment can be realized at every level of choke pressure control, thus avoiding the disadvantages that the most optimal segment of precise control in the previous choke manifold system is narrow. The controlling range of the wellhead back pressure is greatly improved. Through automatic control, the present system can realize function of undisturbed automatic switch during the operation process of each choke level, ensure the choke control pressure transittion to each range of control level safely and smoothly.. Description of the Drawings Figure 1 is the design drawing of one preferred embodiment of multi-level precise choke manifold system according to the present invention in which figure 1A is a plan view,. figure 1B is a side view and figure 1 C is a top view. Figure 2 is the schematic diagram of one. preferred embodiment of multi-level precise choke manifold system and automatic control system according to the present invention. Figure 3 is the schematic diagram of one embodiment of each pressure level flow channel in the multi-level precise choke manifold system and automatic control system according to the present invention. Figure 4 is the illustrated drawing of one embodiment of each. pressure regulation interval in the multi-level precise choke manifold system and automatic control system according to the present invention.
5 Figure 5 is the data collecting and automatic control flow chart in one embodiment of the multi-level precise choke manifold system and automatic control system according to the present invention. Detailed Description of the Embodiments Figure 1 shows a ground multi-level precise choke manifold system in one preferred embodiment of a multi-level precise choke manifold and automatic control system according to the present invention, in which I is an outlet gate valve of drilling fluids back from wellhead; 2 is an inlet gate valve of the choke. manifold; 3 is an outlet gate valve of the choke manifold; 4, 5 and 6 are three plate valves for different pressure level adjustment which connect to choke manifold system in parallel; J is a choke valve used to precisely adjust. under different pressure level conditions; 7 is a gate valve of relief line; 8 is an outlet gate valve of relief line. Figure 2 shows a preferred embodiment of automatic control system in the multi-level precise choke manifold and automatic control system according to the present invention. The system is three layers hierarchical control structure which is divided into measuring and controlling device of bottom layer, controller of middle layer and computer control of top layer. Refer to figure 3 and figure 4. the specific steps to realize progressively choke operation in pressure control level are: First control pressure level: point D J 41 the lower limit A P of the pressure-drop adjustment of the choke manifold, the choke back pressure is P 0 + OP Second control pressure level: closing the choke valve gradually from point M Jj45efn make the choke pressure-drop of the choke manifold rise to point @J 4 5 now the choke pressure-drop can reach to 2 AP the adjustment of pressure-drop during this period is AP but the back pressure produced by choke rises from P 0 + AP to P 0 + 2 AP ; Third control pressure level: closing the choke valve gradually from point Hc5n make the choke pressure-drop of the choke manifold rise to point @J now the choke pressure-drop can reach to 3 AU the adjustment of pressure-drop during this period is ZP but the back pressure produced by choke rises from P 0 + 2 tWP P 0 + 3 AP Fourth control pressure level: closing the choke valve gradually from point 1 4c an make the choke pressure-drop of the choke manifold rise to point RJ, now the choke pressure-drop can reach to 4 AU the adjustment of pressure-drop during this period is AP but the back pressure produced by choke rises from P 0 + 3 t&P P 0 + 4 AP ; Fifth control pressure level: closing the choke valve gradually from point 4 J can make the choke pressure-drop of the choke manifold rise to point ]) and shut-in casing pressure. It can be intuitively understood that P Ois defined as the real pressure of downstream outlet of the choke manifold. It can be known from analysis that point J45sfiegarded as the lower limit of the choke, and it is one step of gradually increase pressure AP = AP J 4 5 6 Figure 5 shows the data collecting and automatic control flow chart in preferred embodiment of the multi-level precise choke manifold and automatic control system according to the present invention.
Claims (5)
1. A multi-level precise choke manifold and automatic control system, which includes a set of ground choke manifold and automatic control system, wherein the choke manifold includes plate valves (4) (5) (6) and a choke valve (J) connected in parallel, said system consists of a pressure sensor used to measure the inlet pressure of the choke manifold, a displacement. sensor used to measure the opening degree of the choke valve, a flow meter used to measure the outlet flow of the choke valve, sensors used to determine switch state of each plate valve, and a device used to filter-amplified various signals and A/D conversion, a device which transmits signals after filter-amplified and A/D conversion to a cabinet and an engineer station, a device used to save and display data, and an automatic control device, the automatic control device calculate and issue control instructions according to current operating state of pipeline and back-pressure pump, proceed the action and speed operation to the switch of plate valve and the opening degree of choke valve based on the steps of choke control process at all levels.
2. The multi-level precise choke manifold and automatic control system according to claim 1, wherein said device used to save and display data employs standard industrial control computer, in which the data bus is connected with the controller, a perfect computer monitoring interface is programmed in a host. computer, all parameters can be: displayed in the host computer so that operators can control the whole control-pressure drilling device through monitoring interface.
3. The multi-level precise choke manifold and automatic control system according to claim 1 or claim 2, wherein said automatic control device employs standard control cabinet in which electrical elements including a controller module, a bus module, an 1/0 module, relay, a safety barrier, an isolated barrier, a ground terminal array etc are installed.
4. A method to specifically realize progressively choke operation in pressure control level operation of the system according to any one of claims 1 to 3, includes following steps: First control pressure level: point 1 J 4 tfie lower limit. A P of the pressure-drop adjustment of the choke manifold, the choke back pressure is P 0 + 4KP Second control pressure level: closing the choke valve gradually from point W J 4Eefn make the choke pressure-drop of the choke manifold rise to point J 4 ,5 now the choke pressure-drop can reach to 2 AP the adjustment of pressure-drop during this period is L P but the back pressure produced by choke rises from P 0 + AP to P 0 + 2 AP ; Third control pressure level: closing the choke valve gradually from point M bIcan make the choke pressure-drop of the choke manifold rise to point @Ji now the choke pressure-drop can reach to 3 AV the adjustment of pressure-drop during this period is AP but the back pressure produced by choke rises from P 0 + 2 tWP P 0 + 3 AP Fourth control pressure level: closing the choke valve gradually from point F l]ilan make the choke pressure-drop of the choke manifold rise to point ®J, now the choke pressure-drop can reach to 4 AP the adjustment of pressure-drop during 9 this period is AP but the back pressure produced by choke rises from P 0 + 3 t&P P 0 + 4 AP : Fifth control pressure level: closing the choke valve gradually from point 4 J can make the choke pressure-drop of the choke manifold rise to point and shut-in casing pressure.
5. The method according to claim 4, wherein P Ois defined as the real pressure of downstream outlet of the choke manifold.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910207405.1A CN101694152B (en) | 2009-10-30 | 2009-10-30 | Multi-level fine choke manifold and automatic control system |
| CN200910207405.1 | 2009-10-30 | ||
| PCT/CN2009/001248 WO2011050500A1 (en) | 2009-10-30 | 2009-11-12 | Multi-level refined throttle manifold and automatic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2009354568A1 true AU2009354568A1 (en) | 2011-08-11 |
Family
ID=42093145
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2009354568A Pending AU2009354568A1 (en) | 2009-10-30 | 2009-11-12 | Multi-level refined throttle manifold and automatic control system |
| AU2009101354A Ceased AU2009101354A4 (en) | 2009-10-30 | 2009-11-12 | Multi-level refined throttle manifold and automatic control system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2009101354A Ceased AU2009101354A4 (en) | 2009-10-30 | 2009-11-12 | Multi-level refined throttle manifold and automatic control system |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101694152B (en) |
| AU (2) | AU2009354568A1 (en) |
| WO (1) | WO2011050500A1 (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892824B (en) * | 2010-07-22 | 2013-07-03 | 中国石油天然气集团公司 | Combined multi-stage pressure control method and device |
| CN102536191B (en) * | 2012-03-15 | 2015-06-17 | 中国石油集团西部钻探工程有限公司 | Automatic throttle control device for pressure-controlled well drilling |
| CN103132982A (en) * | 2013-03-22 | 2013-06-05 | 广州东塑石油钻采专用设备有限公司 | Well shutdown system by one key |
| WO2015107447A1 (en) * | 2014-01-16 | 2015-07-23 | Drillmec Spa | Collector circuit for drilling fluid circulation system and method for diverting the circulation of the fluid |
| CN104481436B (en) * | 2014-12-05 | 2017-05-10 | 中国石油天然气集团公司 | Method and system for regulating precision pressure-control well drilling throttle valve |
| CN107191154B (en) * | 2016-03-15 | 2020-07-31 | 中国石油化工股份有限公司 | Wellhead back pressure regulating method and device |
| CN110892130A (en) * | 2017-03-31 | 2020-03-17 | 科技能源产品有限责任公司 | Controlled pressure drilling manifold, module and method |
| US10253585B2 (en) | 2017-03-31 | 2019-04-09 | Tech Energy Products, L.L.C. | Managed pressure drilling manifold, modules, and methods |
| CN108643887B (en) * | 2018-04-26 | 2020-02-21 | 中国石油大学(华东) | Control method and control device for drilling operation |
| CN109538141B (en) * | 2018-11-27 | 2020-09-29 | 重庆科技学院 | Embedded automatic control device for drilling throttle manifold |
| CN112031684B (en) * | 2019-06-03 | 2023-02-10 | 中国石油天然气集团有限公司 | Controlled pressure drilling back pressure compensation system |
| CN110608026B (en) * | 2019-11-07 | 2020-09-15 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Underground multistage fracturing intelligent sliding sleeve control system and method based on pressure wave communication |
| CN110887659B (en) * | 2019-12-25 | 2021-06-25 | 中国海洋石油集团有限公司 | Experimental device for evaluating safety of high-temperature high-pressure test circulating valve |
| CN111206895A (en) * | 2020-03-29 | 2020-05-29 | 中国石油集团渤海钻探工程有限公司 | System and method for monitoring flow of drilling fluid under fine pressure control |
| CN111502546B (en) * | 2020-05-29 | 2021-11-12 | 中国石油天然气集团有限公司 | Method for turning off underground unit of rotary steering system through ground remote control |
| CN114517666B (en) * | 2020-11-20 | 2023-08-22 | 中国石油天然气股份有限公司 | Throttling method and device for gas well, computer equipment and storage medium |
| CN113431513B (en) * | 2021-06-01 | 2022-12-16 | 四川宏华电气有限责任公司 | Full-automatic control system of high-pressure throttle manifold |
| CN115749710A (en) * | 2021-12-17 | 2023-03-07 | 中国石油天然气集团有限公司 | Hydraulic jet back pressure automatic control system and method |
| CN114458178B (en) * | 2022-01-17 | 2022-08-05 | 大庆市天德忠石油科技有限公司 | A throttle manifold for petroleum well prevents earial drainage |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999057410A2 (en) * | 1998-05-02 | 1999-11-11 | Petroenergy Lcc | Method of and device for production of hydrocarbons |
| US6478089B2 (en) * | 2001-03-19 | 2002-11-12 | Lee Alves | Automatic chemical stick loader for wells and method of loading |
| CN1339650A (en) * | 2001-10-15 | 2002-03-13 | 刘刚 | Microcomputerized automatic control system for oil and gas well drilling throttling pressure |
| CN2635905Y (en) * | 2003-06-29 | 2004-08-25 | 承德江钻石油机械有限责任公司 | Full-automatic control throttling and well killing manifold |
| CN1332122C (en) * | 2004-05-31 | 2007-08-15 | 中国石油天然气股份有限公司 | Multi-stage throttling method for drilling high-pressure oil and gas well |
-
2009
- 2009-10-30 CN CN200910207405.1A patent/CN101694152B/en not_active Expired - Fee Related
- 2009-11-12 AU AU2009354568A patent/AU2009354568A1/en active Pending
- 2009-11-12 AU AU2009101354A patent/AU2009101354A4/en not_active Ceased
- 2009-11-12 WO PCT/CN2009/001248 patent/WO2011050500A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011050500A1 (en) | 2011-05-05 |
| CN101694152B (en) | 2012-12-26 |
| CN101694152A (en) | 2010-04-14 |
| AU2009101354A4 (en) | 2011-09-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DA3 | Amendments made section 104 |
Free format text: THE NATURE OF THE AMENDMENT IS: APPLICATION IS TO PROCEED UNDER THE NUMBER 2009101354 |