CN105003226A - Electric-hydraulic dual-control energy storage type fracturing well completion switch and switch control method - Google Patents
Electric-hydraulic dual-control energy storage type fracturing well completion switch and switch control method Download PDFInfo
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- CN105003226A CN105003226A CN201410670324.6A CN201410670324A CN105003226A CN 105003226 A CN105003226 A CN 105003226A CN 201410670324 A CN201410670324 A CN 201410670324A CN 105003226 A CN105003226 A CN 105003226A
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Abstract
The invention discloses an electric-hydraulic dual-control energy storage type fracturing well completion switch. The electric-hydraulic dual-control energy storage type fracturing well completion switch comprises an upper joint, a center pipe, a pressure transmission outer tube, a slide sleeve outer tube, an outer sheath and a lower joint which are sequentially connected from top to bottom, wherein an energy storage device is arranged on the center pipe; a slide sleeve system is arranged inside the slide sleeve outer tube; a hydraulic transmission system is arranged inside the slide sleeve outer tube and the outer sheath; each of the center pipe, the pressure transmission outer tube and the slide sleeve outer tube is provided with communicated pressure transmission holes; and the energy storage device, the slide sleeve system and the hydraulic transmission system are communicated through the pressure transmission holes. A control driving system is also arranged between the lower half part of the slide sleeve outer tube and the outer sheath. The electric-hydraulic dual-control energy storage type fracturing well completion switch solves the problems that during the conventional ball injection slide sleeve staged fracturing, due to the existence of a ball seat, the layering stage number is limited; the oil well yield is influenced; and the late-period control production and the selective production cannot be realized, and the like.
Description
Technical field
The present invention relates to staged fracturing well-completing process, specifically electric liquid dual control energy storage type pressure break completion switch and method of controlling switch.
Background technology
Staged fracturing well-completing process is the important means improving Development Response of Oilfield, not only achieves the stable yields of oil well, effectively can also alleviate interlayer contradiction, improves ultimate recovery.Particularly in the process of staged fracturing completion, accurately, closing the fluid course flowing to lower floor in time, is a step crucial in staged fracturing well-completing process.
In recent years, the technology such as bore hole pitching sliding sleeve staged fracturing, the interior pumping bridging plug staged fracturing of pipe were widely applied, and also achieved good effect.But along with the application expansion of scale, the expansion of application, prior art exposes some inadaptabilities.Pitching is opened to the pressure break mode of sliding sleeve, due to the restriction by operating tool string and tool design size, only can complete the separate stratum fracfturing transformation of finite progression, meanwhile, the existence of low-density ball and little latus rectum ball seat, impacts wellbore tubular stream, increase flow resistance, cause oil well output to reduce.For pumping bridging plug staged fracturing mode in pipe, bore except bridging plug after needing to enter down bridging plug perforation, pressure break and pressure break step by step by wireline operation, construction period is longer, employs equipment many, and costly, the later stage bores plug operation and also may produce secondary pollution to oil reservoir.The separate stratum fracfturing technology of current employing, does not generally possess the function of later stage control production and selective exploitation.In recent years, domestic and international many scientific research institutions and research institution had all been devoted to develop new pressure break well-completing process, with the technical need at satisfied scene.
Summary of the invention
The object of the present invention is to provide electric liquid dual control energy storage type pressure break completion switch and method of controlling switch, solve conventional pitching sliding sleeve staged fracturing, due to the existence of ball seat, layering progression is limited, and oil well output is impacted, and do not possess the problems such as later stage control production and selective exploitation.
In order to reach above-mentioned purpose, present invention employs following technical scheme, electricity liquid dual control energy storage type pressure break completion switch, comprise the top connection connected successively from top to bottom, central tube, pressure transmission urceolus, sliding sleeve urceolus, oversheath, lower contact, described central tube arranges energy storage device, described sliding sleeve outer barrel arranges sliding sleeve system, described sliding sleeve urceolus and oversheath inside arrange Hydraulic Power Transmission System, described central tube, pressure transmission urceolus, the pressure transmission hole be connected all offered by sliding sleeve urceolus, described energy storage device, sliding sleeve system, Hydraulic Power Transmission System is connected by pressure transmission hole.
Between described sliding sleeve urceolus the latter half and oversheath, also control-driven system is set, described control-driven system comprises control device, high-temperature battery group and solenoid operated directional valve, control device is by radio receiver, controller forms, control device, high-temperature battery group is arranged in the front cavity that sliding sleeve urceolus and oversheath surround, solenoid operated directional valve is arranged in the rear cavity that sliding sleeve urceolus and oversheath surround, two of solenoid operated directional valve export two pressure transmission holes offered with sliding sleeve urceolus the first half respectively and are connected, an import is connected with the pressure transmission hole that sliding sleeve urceolus the latter half is offered, control device is connected by signal pipe line with solenoid operated directional valve, signal pipe line is arranged in the side cannelure that sliding sleeve urceolus and oversheath surround.
Described Hydraulic Power Transmission System comprises oil pocket, lower piston, oil pocket be by bottom sliding sleeve urceolus, the cavity that surrounds of oversheath and lower contact, oversheath is threaded connection with sliding sleeve urceolus and lower contact up and down respectively, two pressure transmission holes are had vertically in the thick arm in top of sliding sleeve urceolus, a pressure transmission hole is had vertically in the thick arm in bottom, sliding sleeve urceolus external wall of upper portion radially has liquid outlet, lower contact inwall radially has inlet.
Described energy storage device comprises nitrogen charging device, nitrogen chamber, Compress Spring, compression nut, upper piston, nitrogen charging device fills nitrogen joint by what connect successively from top to bottom, ball seat, ball sealer, push rod and fill nitrogen spring composition, be arranged in the pre-manufactured hole in central tube heavy wall, the top of pressure transmission urceolus and the top of central tube are threaded connection, the cavity formed is nitrogen chamber, inside is provided with Compress Spring, upper piston, Compress Spring top cover has compression nut, spring bottom arranges upper piston, compression nut is used for pretension Compress Spring, nitrogen pressure and initial tension of spring all act on upper piston, energy storage device is for providing closedown power to sliding sleeve system.
Described sliding sleeve system comprises sliding sleeve, upper oil cavitie, lower oil cavitie, anti-rotation pin, described upper and lower oil pocket is two cavitys surrounded by sliding sleeve and sliding sleeve urceolus, two cavitys are connected with two pressure transmission holes offered vertically in the thick arm in sliding sleeve urceolus top respectively, upper oil cavitie is also connected with nitrogen chamber, and sliding sleeve inwall radially has inlet.
In order to reach another object above-mentioned, present invention employs following technical scheme, the control mode of this completion switch adopts automatically controlled, sends by dropping into signal ball the on off state that wireless signal instruction controls completion switch, type of drive adopts electricity, liquid combines driving, and the implementation procedure of control method is:
Original state: solenoid operated directional valve is in closed condition, inlet is closed, two liquid outlets are communicated with, sliding sleeve two ends oil pocket is by two pressure transmission holes above pressure line and sliding sleeve urceolus, and solenoid operated directional valve is in connected state, pressure at two ends balances, and sliding sleeve is failure to actuate, and completion switch is in closed condition;
Electricity liquid dual control energy storage type pressure break completion switch opens process: after the control-driven system in completion switch receives OPEN, control solenoid operated directional valve, spool action, transmission system oil pocket is communicated with sliding sleeve lower oil cavitie, when overpressure reach shear pin cut off pressure time, shear pin is cut off, overpressure promotes lower piston and moves up, pressure oil in oil pocket enters sliding sleeve lower oil cavitie and promotes sliding sleeve moves, pressure oil in sliding sleeve upper oil cavitie enters into chamber below nitrogen chamber by the pressure transmission hole on pressure transmission urceolus, promote upper piston moves, Compress Spring and nitrogen realize pressure and store, complete thermal energy storage process, completion switch liquid outlet is opened, carry out pressing crack construction,
Electricity liquid dual control energy storage type pressure break completion switch closing process: pressing crack construction terminates rear overpressure and reduces, nitrogen cavity pressure is greater than overpressure, promotion upper piston moves down, pressure oil enters into sliding sleeve upper oil cavitie, promotion sliding sleeve moves down, pressure oil in sliding sleeve lower oil cavitie is back to transmission system oil pocket, completion switch liquid outlet is closed, control-driven system receives out code afterwards, control solenoid operated directional valve resets, close inlet, completion switch returns to initial closed state, the not managed interior pressure influence of on off state;
Repeat appeal operation and can realize the operation of completion switch multiple switching.
Compared to prior art, the present invention has following beneficial effect:
This electric liquid dual control energy storage type pressure break completion switch, adopt full-bore design, layering progression is unrestricted.On off state adopts automatically controlled mode, can repeat switch, meets later stage selective exploitation and waits requirement.Type of drive adopts electricity, liquid combines driving, solenoid operated directional valve adopts driven by power, lower oil cavitie feed pathway on switching sliding sleeve, and spool adopts pressure balance type design, spool action only needs overcome friction, operational power is less, can select the electromagnetic valve of reduced size, meets the installation requirement at small space, sliding sleeve switch operation adopts hydraulic-driven, drive power comparatively large, be conducive to sliding sleeve and move up and down, ensure the reliability of sliding sleeve switch action.
Accompanying drawing explanation
Fig. 1 is the structural representation of electric liquid dual control energy storage type pressure break completion switch;
Fig. 2 is the I place partial enlarged drawing of Fig. 1;
Fig. 3 is the sectional drawing of pressure break completion switch section A-A;
Fig. 4 is the sectional drawing of pressure break completion switch section B-B;
Fig. 5 is the sectional drawing of pressure break completion switch cross section C-C;
Fig. 6 is the structural representation of pressure break completion switch controlling device;
Fig. 7 is solenoid operated directional valve closed condition schematic diagram;
Fig. 8 is solenoid operated directional valve opening schematic diagram.
In figure, top connection 1, nitrogen charging device 2, compression nut 3, spring 4, central tube 5, piston 6, pressure transmission urceolus 7, pressure transmission hole 8, sliding sleeve 9, upper oil cavitie 10, lower oil cavitie 11, pressure transmission hole 12, pressure transmission hole 13, liquid outlet 14, anti-rotation pin 15, sliding sleeve urceolus 16, high-temperature battery group 17, control device 18, inlet 19, solenoid operated directional valve 20, signal pipe line 21, pressure transmission hole 22, oil pocket 23, lower piston 24, inlet 25, shear pin 26, lower piston retainer ring 27, oversheath 28, lower contact 29, cavity 30, cannelure 31, cavity 32.
Detailed description of the invention
Detailed description for the present invention and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides with reference to the use with explanation, is not used for being limited the present invention.
According to Fig. 1-8, electricity liquid dual control energy storage type pressure break completion switch, primarily of top connection 1, central tube 5, pressure transmission urceolus 7, sliding sleeve urceolus 16, oversheath 28, lower contact 29 and inner energy storage device, Hydraulic Power Transmission System, control-driven system and the sliding sleeve system composition arranged.
Energy storage device comprises nitrogen charging device 2, nitrogen chamber, spring 4, compression nut 3, upper piston 6.Nitrogen charging device 2 forms by filling nitrogen joint 2-1, ball seat 2-2, ball sealer 2-3, push rod 2-4 and spring 2-5, be arranged in the pre-manufactured hole in central tube 5 heavy wall, the top of pressure transmission urceolus 7 and the top of central tube 5 are threaded connection, the cavity formed is nitrogen chamber, inside is provided with compression nut 3, spring 4, upper piston 6, compression nut 3 is for preloading spring 4, and nitrogen pressure and initial tension of spring all act on upper piston 6.Energy storage device is for providing closedown power to sliding sleeve 9.
Hydraulic Power Transmission System comprise oil pocket and pressure oil 23, pressure line and pressure transmission hole 12,13,22, pressure transmission hole 8, lower piston 24, oil pocket is the cavity surrounded by sliding sleeve urceolus 16, oversheath 28 and lower contact 29, oversheath about 28 is threaded connection with sliding sleeve urceolus 16 and lower contact 29, two pressure transmission holes 12,13 are had vertically in the thick arm in top of sliding sleeve urceolus 16, a pressure transmission hole 22 is had vertically in the thick arm in bottom, external wall of upper portion radially has liquid outlet 14, lower contact 29 inwall radially has inlet 25.
Control-driven system comprises control device 18, high-temperature battery group 17 and solenoid operated directional valve 20, control device 18, high-temperature battery group 17 are arranged in the cavity 32 that sliding sleeve urceolus 16 and oversheath 28 surround, solenoid operated directional valve 20 is arranged in the cavity 30 that sliding sleeve urceolus 16 and oversheath 28 surround, two outlets of solenoid operated directional valve 20 are connected with pressure transmission hole 12,13 respectively, an import is connected with pressure transmission hole 22, control device 18 is connected by signal pipe line 21 with solenoid operated directional valve 20, and signal pipe line 21 is arranged in cannelure 31.Control device 18 is made up of radio receiver 18-1, controller 18-2, radio receiver 18-1 is for receiving wireless control signal, controller 18-2 is used for the action of Controlling solenoid valve, the signal input part of the signal output part connection control device 18-2 of radio receiver 18-1, the signal output part of controller 18-2 connects solenoid operated directional valve 20.Controller wherein and receiving system are the product that existing market can directly be buied, and just no longer launch to repeat at this.
Sliding sleeve system comprises sliding sleeve 9, sliding sleeve urceolus 16, upper oil cavitie 10, lower oil cavitie 11, anti-rotation pin 15, upper and lower oil pocket is the cavity surrounded by sliding sleeve 9 and sliding sleeve urceolus 16, be connected with pressure transmission hole 12,13, upper oil cavitie 10 is also connected with nitrogen chamber, and sliding sleeve 9 inwall radially has inlet 19.
The implementation procedure of the control method of electricity liquid dual control energy storage type pressure break completion switch is:
Original state: the spool of solenoid operated directional valve 20 is in position shown in Fig. 6, inlet is closed, two liquid outlets are communicated with, sliding sleeve 9 two ends oil pocket 10,11 is by pressure transmission hole 12,13, and solenoid operated directional valve 20 is in connected state, pressure at two ends balances, and sliding sleeve 9 is failure to actuate, and completion switch is in closed condition.
Opening procedure: after the control-driven system in pressure break completion switch receives OPEN, control solenoid operated directional valve 20, spool moves to position shown in Fig. 7, transmission system oil pocket 23 is by pressure transmission hole 22, 13 and solenoid operated directional valve 20 inlet and outlet pressure pipeline be communicated with sliding sleeve lower oil cavitie 11, overpressure acts on lower piston 24 by inlet 25, when overpressure reach shear pin 26 cut off pressure time, shear pin is cut off, overpressure promotes lower piston 24 and moves up, pressure oil in oil pocket 23 enters sliding sleeve 9 lower oil cavitie 11 and promotes sliding sleeve 9 moves, inlet 19 on sliding sleeve 9 is communicated with the liquid outlet 14 on sliding sleeve urceolus 16, pressure oil in upper oil cavitie 10 enters into nitrogen chamber by pressure transmission hole 8 and promotes upper piston 6 moves, Compress Spring 4 and nitrogen realize pressure and store, completion switch is opened.
Closing process: pressing crack construction terminates rear overpressure and reduces, nitrogen cavity pressure is greater than overpressure, promote upper piston 6 to move down, pressure oil enters into sliding sleeve upper oil cavitie 10, promote sliding sleeve 9 to move down, pressure oil in sliding sleeve lower oil cavitie 11 is back to transmission system oil pocket 23, completion switch liquid outlet is closed, control-driven system receives out code afterwards, control solenoid operated directional valve resets, close solenoid operated directional valve inlet, completion switch returns to initial closed state, the not managed interior pressure influence of on off state.Repeat appeal operation and can realize the operation of completion switch multiple switching.
The foregoing is only preferred embodiment of the present invention, be not used to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (6)
1. electric liquid dual control energy storage type pressure break completion switch, it is characterized in that, comprise connect successively from top to bottom top connection, central tube, pressure transmission urceolus, sliding sleeve urceolus, oversheath, lower contact, described central tube arranges energy storage device, described sliding sleeve outer barrel arranges sliding sleeve system, described sliding sleeve urceolus and oversheath inside arrange Hydraulic Power Transmission System, the pressure transmission hole be connected all offered by described central tube, pressure transmission urceolus, sliding sleeve urceolus, and described energy storage device, sliding sleeve system, Hydraulic Power Transmission System are connected by pressure transmission hole.
2. electric liquid dual control energy storage type pressure break completion switch according to claim 1, it is characterized in that, between described sliding sleeve urceolus the latter half and oversheath, also control-driven system is set, described control-driven system comprises control device, high-temperature battery group and solenoid operated directional valve, control device, high-temperature battery group is arranged in the front cavity that sliding sleeve urceolus and oversheath surround, solenoid operated directional valve is arranged in the rear cavity that sliding sleeve urceolus and oversheath surround, two of solenoid operated directional valve export two pressure transmission holes offered with sliding sleeve urceolus the first half respectively and are connected, an import is connected with the pressure transmission hole that sliding sleeve urceolus the latter half is offered, control device is connected by signal pipe line with solenoid operated directional valve, signal pipe line is arranged in the side cannelure that sliding sleeve urceolus and oversheath surround.
3. electric liquid dual control energy storage type pressure break completion switch according to claim 1, it is characterized in that, described Hydraulic Power Transmission System comprises oil pocket, lower piston, oil pocket be by bottom sliding sleeve urceolus, the cavity that surrounds of oversheath and lower contact, oversheath is threaded connection with sliding sleeve urceolus and lower contact up and down respectively, two pressure transmission holes are had vertically in the thick arm in top of sliding sleeve urceolus, a pressure transmission hole is had vertically in the thick arm in bottom, sliding sleeve urceolus external wall of upper portion radially has liquid outlet, lower contact inwall radially has inlet.
4. electric liquid dual control energy storage type pressure break completion switch according to claim 1, it is characterized in that, described energy storage device comprises nitrogen charging device, nitrogen chamber, Compress Spring, compression nut, upper piston, nitrogen charging device fills nitrogen joint by what connect successively from top to bottom, ball seat, ball sealer, push rod and fill nitrogen spring composition, be arranged in the pre-manufactured hole in central tube heavy wall, the top of pressure transmission urceolus and the top of central tube are threaded connection, the cavity formed is nitrogen chamber, inside is provided with Compress Spring, upper piston, Compress Spring top cover has compression nut, spring bottom arranges upper piston, compression nut is used for pretension Compress Spring, nitrogen pressure and initial tension of spring all act on upper piston, energy storage device is for providing closedown power to sliding sleeve system.
5. electric liquid dual control energy storage type pressure break completion switch according to claim 1, it is characterized in that, described sliding sleeve system comprises sliding sleeve, upper oil cavitie, lower oil cavitie, anti-rotation pin, described upper and lower oil pocket is two cavitys surrounded by sliding sleeve and sliding sleeve urceolus, two cavitys are connected with two pressure transmission holes offered vertically in the thick arm in sliding sleeve urceolus top respectively, upper oil cavitie is also connected with nitrogen chamber, and sliding sleeve inwall radially has inlet.
6. electric liquid dual control energy storage type pressure break completion method of controlling switch, it is characterized in that, the control mode of this completion switch adopts automatically controlled, the on off state that wireless signal instruction controls completion switch is sent by dropping into signal ball, type of drive adopts electricity, liquid combines driving, and the implementation procedure of control method is:
Original state: solenoid operated directional valve is in closed condition, inlet is closed, two liquid outlets are communicated with, sliding sleeve two ends oil pocket is by two pressure transmission holes above pressure line and sliding sleeve urceolus, and solenoid operated directional valve is in connected state, pressure at two ends balances, and sliding sleeve is failure to actuate, and completion switch is in closed condition;
Electricity liquid dual control energy storage type pressure break completion switch opens process: after the control-driven system in completion switch receives OPEN, control solenoid operated directional valve, spool action, transmission system oil pocket is communicated with sliding sleeve lower oil cavitie, when overpressure reach shear pin cut off pressure time, shear pin is cut off, overpressure promotes lower piston and moves up, pressure oil in oil pocket enters sliding sleeve lower oil cavitie and promotes sliding sleeve moves, pressure oil in sliding sleeve upper oil cavitie enters into chamber below nitrogen chamber by the pressure transmission hole on pressure transmission urceolus, promote upper piston moves, Compress Spring and nitrogen realize pressure and store, complete thermal energy storage process, completion switch liquid outlet is opened, carry out pressing crack construction,
Electricity liquid dual control energy storage type pressure break completion switch closing process: pressing crack construction terminates rear overpressure and reduces, nitrogen cavity pressure is greater than overpressure, promotion upper piston moves down, pressure oil enters into sliding sleeve upper oil cavitie, promotion sliding sleeve moves down, pressure oil in sliding sleeve lower oil cavitie is back to transmission system oil pocket, completion switch liquid outlet is closed, control-driven system receives out code afterwards, control solenoid operated directional valve resets, close inlet, completion switch returns to initial closed state, the not managed interior pressure influence of on off state;
Repeat appeal operation and can realize the operation of completion switch multiple switching.
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| CN201410670324.6A CN105003226B (en) | 2014-11-20 | 2014-11-20 | Electro-hydraulic dual control energy storage type pressure break completion switch and method of controlling switch |
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| CN113027380B (en) * | 2021-02-08 | 2022-07-29 | 中国石油大学(华东) | Fully-electrically-driven underground safety valve and redundancy control system thereof |
| CN113027380A (en) * | 2021-02-08 | 2021-06-25 | 中国石油大学(华东) | Fully-electrically-driven underground safety valve and redundancy control system thereof |
| CN114991731A (en) * | 2021-03-01 | 2022-09-02 | 华鼎鸿基石油工程技术(北京)有限公司 | Well cementation fracturing tool with electric control sliding sleeve |
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