CN203257353U - Novel pressure control drilled well system - Google Patents
Novel pressure control drilled well system Download PDFInfo
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- CN203257353U CN203257353U CN 201320246841 CN201320246841U CN203257353U CN 203257353 U CN203257353 U CN 203257353U CN 201320246841 CN201320246841 CN 201320246841 CN 201320246841 U CN201320246841 U CN 201320246841U CN 203257353 U CN203257353 U CN 203257353U
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- well system
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Abstract
The utility model discloses a novel pressure control drilled well system which is composed of main devices such as a nitrogen making machine, a compressor, a supercharger, a mud pump, a pressure returning pump system, an automatic choke manifold, a choke manifold, a kill manifold, a blowout preventer unit and underground tools. According to the novel pressure control drilled well system, the function that nitrogen is filled is added on the basis of a common precise pressure control drilled well system, so that the functions of the common precise pressure control drilled well system are achieved, the lower limiting value of a mud density window is decreased, and the range of the mud density window is enlarged. When well leakage can not be stopped by means of common precise pressure control, the equivalent circulating density of a shaft is far lower than the density of water through the nitrogen filling method, and the condition of precise control of a shaft annular pressure section is reestablished. According to the novel pressure control drilled well system, the lower limiting value of the mud density window is decreased through the control over the discharging amount of nitrogen, the adjusting and control capacity is enhanced, the application range of a pressure control drilled well is enlarged, and the requirement for drilling is further satisfied.
Description
Technical field
The utility model belongs to oilfield drilling pressure control field, is specifically related to a kind of novel managed pressure drilling system.
Background technology
In recent years, domestic on the under balance pressure drilling basis in order to solve the difficult problem in complex geological condition area drilling well, researched and developed meticulous controlled pressure drilling technology.At present, the conventional meticulous managed pressure drilling system of domestic several mechanisms research and development enters drilling phase successively.
Conventional meticulous managed pressure drilling system has its limitation in the controlled pressure scope.The factor that affects bottom pressure comprises well head pressure, mud density, the performance of mud own and circulation rate etc., and wherein mud density has the greatest impact.Conventional meticulous managed pressure drilling system can only be controlled at the adjustable range of mud density on the water density.
Summary of the invention
The purpose of this utility model is to provide a kind of novel managed pressure drilling system, to solve traditional meticulous managed pressure drilling system because not enlarging the Mud Density Window lower limit, and after can not satisfying the generation severe circulation loss, further reduce the technical problems such as drilling well requirement of mud density.
The technical scheme that the foregoing invention purpose that realizes the utility model adopts is as follows:
A kind of novel managed pressure drilling system comprises drilling rod, with the pressure of the drill power survey tool and drill bit; Well head part at drilling rod is provided with well head four-way, ram preventer, annular preventer and rotating blowout preventer; The output of described rotating blowout preventer is behind the self-choke manifold, and a route liquid-gas separator is lighted gas output, another route vibrosieve to solid control equipment again to mud pit; Described mud pit is connected with well head four-way mud input with kill manifold through slush pump, the output of pit shaft four-way by self-choke manifold or choke manifold and described liquid-gas separator be connected vibrosieve and be connected; The well head input of drilling rod is connected with mud pit by slush pump, also is connected with nitrogen making machine by supercharger, compressor.
The utility model compared with prior art, the beneficial effect that has is:
1, compares with conventional drilling, under-balanced drilling technology, when operating modes such as normally creeping into, make up a joint, make a trip, can make the shaft bottom be in all the time stable state by regulating rapidly the method for wellhead back pressure, the protection oilfield reservoir.
2, compare with the meticulous managed pressure drilling system of routine, increased the function of nitrogen injection, can be by the method for nitrogen injection, make the mineshaft annulus mud density far below the density of water, strengthened the ability of regulating Mud Density Window, enlarge the Mud Density Window lower limit, created the pressure control condition that only can't finish by the meticulous managed pressure drilling system of routine, be conducive to process the phenomenon of severe circulation loss.Have more advantage in processing severe circulation loss problem, not only possess all functions of conventional meticulous controlled pressure drilling technology, and realized the target of control pit shaft equivalent circulating density below water density.
Description of drawings
Fig. 1 is novel managed pressure drilling system schematic diagram of the present utility model.
The specific embodiment
Principle of the present utility model and composition are referring to shown in Figure 1.A kind of novel managed pressure drilling system comprises: nitrogen making machine, compressor, supercharger, slush pump, backpressure pump system, self-choke manifold, choke manifold, kill manifold, rotating blowout preventer, annular preventer, ram preventer, well head four-way, drilling rod, with the pressure of the drill power survey tool, drill bit, liquid-gas separator, vibrosieve, solid control equipment, pipeline and valve member etc.The output of described rotating blowout preventer is behind the self-choke manifold, and a route liquid-gas separator is lighted gas output, another route vibrosieve to solid control equipment again to mud pit; Described mud pit is connected with well head four-way mud input with kill manifold through slush pump, the output of pit shaft four-way by self-choke manifold or choke manifold and described liquid-gas separator be connected vibrosieve and be connected; The well head input of drilling rod is connected with mud pit by slush pump, also is connected with nitrogen making machine by supercharger, compressor.
Behind drilling process generation severe circulation loss, regulate the wellhead back pressure value to zero, dilute gradually mud simultaneously, make mud density be down to density near water, behind the circulating mud, still there is the leakage phenomenon, so conventional meticulous controlled pressure drilling controlled pressure means lost efficacy.In order to solve the limitation of conventional meticulous controlled pressure drilling Mud Density Window lower limit, start the equipment such as nitrogen making machine, compressor, supercharger, to the inner nitrogen injection of drill string, behind circulating mud, reach the purpose of further reduction well mud density, can make intrasystem circulation equal yield density far below the density of water, break the limitation of Mud Density Window lower limit, stop leakage to continue to occur, create the condition that continues controlled pressure drilling.
The utility model not only has the function of conventional meticulous controlled pressure drilling, and possesses to the inner nitrogen injection of drill string, further reduces the ability of mineshaft annulus mud density.By nitrogen injection, the discharge capacity of control gas makes mineshaft annulus mud density decrease, reaches the purpose of control Mud Density Window lower limit, makes the controlled pressure drilling technology scope of application wider.
The utility model and conventional meticulous managed pressure drilling system pressure control means are basic identical, just when processing the leakage problem, have more advantage.In the pressure control process, if severe circulation loss occurs, add entry and dilute gradually mud and circulate, and reduce gradually the wellhead back pressure value, until be zero, mud density moves closer to the density of water, still there is leakage, lost efficacy by the meticulous controlled pressure drilling regulating measure of routine, can not carry out controlled pressure drilling.At this moment start the equipment such as nitrogen making machine, compressor, supercharger, open the valve on the nitrogen flow in pipes, nitrogen injection in the drill string after circulation a period of time, makes and forms gas-liquid mixture fluid in the mineshaft annulus.By the discharge capacity of control nitrogen injection, reach the purpose of equivalent circulating density in the control pit shaft.Continue nitrogen injection, reduce the density of mineshaft annulus gas-liquid mixture fluid, behind the stable circulation, observe leakage and whether stop, if do not stop, then strengthening the nitrogen discharge capacity, if stop, illustrating that then gas-liquid mixture fluid density is in ' Safe Density Windows.At this moment, continue to keep the nitrogen discharge capacity constant, according to the information that collects, judge the shaft bottom state, determine the discharge capacity that nitrogen injects.Regulate the self-choke manifold, apply back pressure at well head, use the well head pressure compensation to change the jitter values that causes that bottom pressure changes because of mud density, keep the stable state in shaft bottom, reach the purpose of controlled pressure.At this moment, drill bit should pass through rapidly the leakage stratum.Behind the leakage stratum, according to judging the shaft bottom state, determine again to stop the time of nitrogen injection, rebulid the condition of meticulous control wellbore annulus pressure section, implement controlled pressure drilling.
Claims (1)
1. novel managed pressure drilling system comprises drilling rod, with the pressure of the drill power survey tool and drill bit; It is characterized in that, be provided with well head four-way, ram preventer, annular preventer and rotating blowout preventer in the well head part of drilling rod; The output of described rotating blowout preventer is behind the self-choke manifold, and a route liquid-gas separator is lighted gas output, another route vibrosieve to solid control equipment again to mud pit; Described mud pit is connected with well head four-way mud input with kill manifold through slush pump, the output of pit shaft four-way by self-choke manifold or choke manifold and described liquid-gas separator be connected vibrosieve and be connected; The well head input of drilling rod is connected with mud pit by slush pump, also is connected with nitrogen making machine by supercharger, compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320246841 CN203257353U (en) | 2013-05-08 | 2013-05-08 | Novel pressure control drilled well system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320246841 CN203257353U (en) | 2013-05-08 | 2013-05-08 | Novel pressure control drilled well system |
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| CN203257353U true CN203257353U (en) | 2013-10-30 |
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| CN 201320246841 Expired - Lifetime CN203257353U (en) | 2013-05-08 | 2013-05-08 | Novel pressure control drilled well system |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775049A (en) * | 2014-01-24 | 2014-05-07 | 中国石油大学(华东) | Managed pressure drilling experimental device and control method thereof |
| CN104213830A (en) * | 2014-07-30 | 2014-12-17 | 中国石油集团钻井工程技术研究院 | Managed pressure drilling method for geological conditions of narrow safe density window |
| CN104266478A (en) * | 2014-10-14 | 2015-01-07 | 中山昊天节能科技有限公司 | Air energy baking oven |
| CN104632111A (en) * | 2014-12-19 | 2015-05-20 | 西南石油大学 | Device and method for transmitting downhole signal through using mud pulse under aerated drilling condition |
| CN105019842A (en) * | 2014-04-29 | 2015-11-04 | 中国石油化工股份有限公司 | System and method for managed pressure drilling |
| CN105507841A (en) * | 2014-09-30 | 2016-04-20 | 中国石油天然气股份有限公司 | Nitrogen drilling anti-erosion wellhead apparatus |
| CN106894778A (en) * | 2017-03-29 | 2017-06-27 | 西南石油大学 | A kind of kill-job operation choke valve automatic control system and its method based on feedback regulation |
| CN107448166A (en) * | 2016-05-31 | 2017-12-08 | 中国石油天然气集团公司 | A kind of methods of risk assessment and device of well drilling blowout prevention device system |
| CN105672927B (en) * | 2014-11-21 | 2019-04-05 | 中石化胜利石油工程有限公司钻井工艺研究院 | A kind of well killing method after gas drilling blowout |
| CN109736772A (en) * | 2018-11-21 | 2019-05-10 | 长江大学 | It is a kind of to return out the simple pressure control drilling method monitored and system based on annular space |
| CN110118069A (en) * | 2019-05-27 | 2019-08-13 | 西南石油大学 | A kind of ultra-deep well drilling pressure control equipment and operating method |
| CN113216883A (en) * | 2021-04-13 | 2021-08-06 | 上海万维亿通装备制造有限公司 | Gas explosion inertial siphon negative pressure drilling system and process |
| CN113311140A (en) * | 2020-02-26 | 2021-08-27 | 中国石油天然气股份有限公司 | Hydrocarbon reservoir testing system and method |
| CN114165200A (en) * | 2021-11-09 | 2022-03-11 | 昌黎县迪艾沃石油开采技术开发有限公司 | Downhole gas injection method |
| CN115126431A (en) * | 2022-07-14 | 2022-09-30 | 西南石油大学 | Continuous gas injection constant bottom hole pressure control drilling system and automatic control method |
-
2013
- 2013-05-08 CN CN 201320246841 patent/CN203257353U/en not_active Expired - Lifetime
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775049A (en) * | 2014-01-24 | 2014-05-07 | 中国石油大学(华东) | Managed pressure drilling experimental device and control method thereof |
| CN105019842A (en) * | 2014-04-29 | 2015-11-04 | 中国石油化工股份有限公司 | System and method for managed pressure drilling |
| CN105019842B (en) * | 2014-04-29 | 2018-10-23 | 中国石油化工股份有限公司 | System and method for pressure controllable drilling well |
| CN104213830B (en) * | 2014-07-30 | 2016-03-16 | 中国石油集团钻井工程技术研究院 | For the controlled pressure drilling method of narrow ' Safe Density Windows geological conditions |
| CN104213830A (en) * | 2014-07-30 | 2014-12-17 | 中国石油集团钻井工程技术研究院 | Managed pressure drilling method for geological conditions of narrow safe density window |
| CN105507841A (en) * | 2014-09-30 | 2016-04-20 | 中国石油天然气股份有限公司 | Nitrogen drilling anti-erosion wellhead apparatus |
| CN104266478A (en) * | 2014-10-14 | 2015-01-07 | 中山昊天节能科技有限公司 | Air energy baking oven |
| CN105672927B (en) * | 2014-11-21 | 2019-04-05 | 中石化胜利石油工程有限公司钻井工艺研究院 | A kind of well killing method after gas drilling blowout |
| CN104632111B (en) * | 2014-12-19 | 2017-02-22 | 西南石油大学 | Device and method for transmitting downhole signal through using mud pulse under aerated drilling condition |
| CN104632111A (en) * | 2014-12-19 | 2015-05-20 | 西南石油大学 | Device and method for transmitting downhole signal through using mud pulse under aerated drilling condition |
| CN107448166B (en) * | 2016-05-31 | 2019-12-10 | 中国石油天然气集团公司 | risk assessment method and device for drilling blowout preventer system |
| CN107448166A (en) * | 2016-05-31 | 2017-12-08 | 中国石油天然气集团公司 | A kind of methods of risk assessment and device of well drilling blowout prevention device system |
| CN106894778A (en) * | 2017-03-29 | 2017-06-27 | 西南石油大学 | A kind of kill-job operation choke valve automatic control system and its method based on feedback regulation |
| CN109736772A (en) * | 2018-11-21 | 2019-05-10 | 长江大学 | It is a kind of to return out the simple pressure control drilling method monitored and system based on annular space |
| CN110118069A (en) * | 2019-05-27 | 2019-08-13 | 西南石油大学 | A kind of ultra-deep well drilling pressure control equipment and operating method |
| CN110118069B (en) * | 2019-05-27 | 2024-06-14 | 西南石油大学 | Ultra-deep well drilling pressure control equipment and operation method |
| CN113311140A (en) * | 2020-02-26 | 2021-08-27 | 中国石油天然气股份有限公司 | Hydrocarbon reservoir testing system and method |
| CN113311140B (en) * | 2020-02-26 | 2024-03-01 | 中国石油天然气股份有限公司 | Hydrocarbon reservoir testing system and hydrocarbon reservoir testing method |
| CN113216883A (en) * | 2021-04-13 | 2021-08-06 | 上海万维亿通装备制造有限公司 | Gas explosion inertial siphon negative pressure drilling system and process |
| CN113216883B (en) * | 2021-04-13 | 2024-06-18 | 上海万维亿通装备制造有限公司 | Air explosion inertia siphon negative pressure drilling system and technology |
| CN114165200A (en) * | 2021-11-09 | 2022-03-11 | 昌黎县迪艾沃石油开采技术开发有限公司 | Downhole gas injection method |
| CN115126431A (en) * | 2022-07-14 | 2022-09-30 | 西南石油大学 | Continuous gas injection constant bottom hole pressure control drilling system and automatic control method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |
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| CX01 | Expiry of patent term |