CN104088603B - Method for controlling underground sliding sleeves by ground pressure waves - Google Patents
Method for controlling underground sliding sleeves by ground pressure waves Download PDFInfo
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- CN104088603B CN104088603B CN201410271933.4A CN201410271933A CN104088603B CN 104088603 B CN104088603 B CN 104088603B CN 201410271933 A CN201410271933 A CN 201410271933A CN 104088603 B CN104088603 B CN 104088603B
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Abstract
The invention discloses a method for controlling underground sliding sleeves by ground pressure waves. The method comprises the steps as follows: the ground pumping displacement is adjusted regularly to enable underground pressure to change according to the same rule, that is, a pressure fluctuation signal comprising a control command is transmitted to the underground; a receiving device arranged on each sliding sleeve receives the ground control command, and the ground control command is compared with command information assigned by the sliding sleeve; if the ground control command is different from the command information assigned in each sliding sleeve, the sliding sleeve does not act and waits for a next ground control command; and if the ground control command is the same as the command information assigned in each sliding sleeve, the sliding sleeve acts and finishes the opening or closing operation required by the control command. According to the method for controlling the underground sliding sleeves by the ground pressure waves, the underground pressure changes regularly according to regular adjustment of the ground pumping displacement, opening and closing actions of the underground sliding sleeves are remotely controlled by recognizing the signals transmitted through regular pressure change, and opening and closing of the sliding sleeves can be controlled in real time.
Description
Technical field
The present invention relates to a kind of method that geostatic pressure ripple controls underground sliding sleeve, for staged fracturing of horizontal well acidifying transformation, belong to the completion renovation technique field used in oil exploitation.
Background technology
Sliding sleeve, as a kind of downhole tool that can link up/isolate Oil/gas Well and formation fluid, is now widely used in staged fracturing of horizontal well acidizing treatment tubing string.Oilfield horizontal well staged fracturing acidifying at present uses mechanical type pitching sliding sleeve, open every one-level sliding sleeve and be required for putting into the pressure break ball of correspondingly-sized, during construction, each layer sliding sleeve is opened in the most successively pitching, every one-level sliding sleeve tee internal diameter and pressure break ball internal diameter all differ, and from top to bottom, sliding sleeve tee and pressure break ball internal diameter increase step by step, the maximum minimum diameter that not can exceed that upper tool, this shift sleeve structure is complicated, and latus rectum is little, and pressure break progression is limited；And when the reservoir later stage produces water, needs to close sliding sleeve, owing to sliding sleeve cannot realize closing closure, cause Oil & Gas Productivity to reduce and even scrap.
Such as, Chinese patent literature disclosed " a kind of ball-casting opened self-locking sliding sleeve ", publication number: CN201972661U, publication date: on 09 14th, 2011, this patent describes the pitching when net horizontal section operation and open pressure break sandblasting passage, and lock holding production channels open, but still use pitching segmentation, segments is limited.
Patent " two-way opening pressure differential sliding sleeve ", publication number: CN201723198U, publication date: on 01 26th, 2011, this utility model is to utilize pressure reduction to promote upper and lower fluid cylinder respectively to moving up and down, open passage, pitching sliding sleeve can be solved and cannot be used for horizontal bare hole well staged fracturing, the problem of acidifying tool tubular column first paragraph, but still segmentation limitation problem cannot be solved.
Based on this, develop again some switchable sliding sleeves of new mechanical type, this kind of when sliding over fracture acidizing construction, can by pitching or under enter coiled tubing belt switch TO sliding sleeve, when the reservoir later stage produce water, need close sliding sleeve time, under enter coiled tubing belt switch instrument close sliding sleeve.Such as patent " Intelligent sliding sleeve in a kind of selective switch slide bushing assembly ", publication number: CN202125290U, publication date: on 01 25th, 2012, this utility model is to enter special opening-closing tool under utilization, opens and closes intelligence sliding sleeve.The greatest problem of this kind of sliding sleeve is that coiled tubing belt switch tool switch sliding sleeve needs to use continuous oil pipe device, and operating cost is high, and continuous oil pipe operation needs to take a significant amount of time, and the method operation complexity, long construction period, cost is the highest.
To sum up, in foreign level well staged fracturing Acidizing, up-to-date sliding sleeve control method is that pitching is opened sliding sleeve at different levels successively and constructs when construction, and after the construction of each layer is fully completed, anti-row pressure blastomere also bores the ball seat in each pitching sliding sleeve, produces；In process of production, such as a certain layer position or some layer of position water outlet, then coiled tubing band sliding sleeve switch instrument is descended to close the sliding sleeve of respective layer position；This technology is capable of switching sliding sleeve, but segmentation progression is limited；In domestic staged fracturing of horizontal well Acidizing, commonly used is also ball-throwing type sliding sleeve.But compared to same kind of products at abroad, this kind of sliding sleeve does not possess later stage closable function.And the operation of existing pitching sliding sleeve then needs to wait that ground pitching is fallen the time that sliding sleeve tee is spent, ageing poor.
Summary of the invention
It is an object of the invention to the problems referred to above overcoming the sliding sleeve switch in existing level well staged fracturing Acidizing to exist, it is provided that a kind of geostatic pressure ripple controls the method for underground sliding sleeve.The present invention enters discharge capacity by regularity adjustably face-pumping, bottom pressure regularity is caused to change, this down-hole pressure of underground monitoring changes, and by identifying that the signal that regular pressure change is transmitted remotely controls the switch motion of underground sliding sleeve, it is possible to control the switch motion of sliding sleeve in real time；And need not pitching, latus rectum is big, after the later stage produces water, it is also possible to change bottom pressure by regulating wellhead back pressure at well head, thus control underground sliding sleeve and close.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of geostatic pressure ripple controls the method for underground sliding sleeve, it is characterised in that comprise the steps:
A, being simultaneously connected with multiple sliding sleeve on completion tubular column, each sliding sleeve is assigned with different command informations, G.I.H；
B, regularity adjustably face-pumping enters discharge capacity, makes down-hole pressure change according to identical rule, i.e. contains the Pressure Fluctuation Signal of control instruction to down-hole transmission；
The reception device arranged on c, each sliding sleeve all receives ground control instruction, and compares with the command information self distributed；
If d ground control instruction is different from the command information of sliding sleeve internal distribution, then sliding sleeve is failure to actuate, and continues waiting for ground control instruction next time；
If e ground control instruction is identical with the command information of sliding sleeve internal distribution, then this underground sliding sleeve action, the underground sliding sleeve completing control instruction requirement opens or closes work.
Described ground controls underground sliding sleeve and includes ground fracturing car group and switching sliding sleeve, switching sliding sleeve includes receiving device, drive system and sliding sleeve, described reception device and drive system are arranged on sliding sleeve, and the shell of described sliding sleeve has spray-hole, and the valve of sliding sleeve has spray-hole；Described ground fracturing car regularity adjustably face-pumping enters the discharge capacity transmission Pressure Fluctuation Signal containing control instruction, receives device and receives control instruction and control drive system drive valve motion；Described valve moves to valve spray-hole when connecting with shell spray-hole, and sliding sleeve is opening, and described valve moves to valve spray-hole when not connecting with shell spray-hole, and sliding sleeve is closed mode.
Described reception device includes pressure transducer, control circuit plate and instruction output unit, pressure transducer, control circuit plate and instruction output unit are sequentially connected with, pressure transducer collection contains the Pressure Fluctuation Signal of control instruction, and control instruction is sent to control circuit plate be identified, instruction output unit receives the control signal of control circuit plate identification, and is controlled drive system according to control signal.
Described drive system includes fluid cylinder, lower piston and the hydraulic oil in fluid cylinder is transported to lower piston drives lower piston to do the oil supply mechanism of straight reciprocating motion, and lower piston is connected with valve and drives valve to move.
Described fluid cylinder includes connecting tube, central canal and upper piston, central canal is positioned at connecting tube, upper connecting tube and central canal one end are connected with top connection, the upper connecting tube other end is connected with cable short circuit, upper piston is arranged between connecting tube and central canal in the annular space formed, and the airtight annular space below upper piston forms the fuel tank of full hydraulic oil.
Described cable short circuit connects middle connecting tube, impulse short circuit it is provided with between middle connecting tube and central canal, impulse short circuit connects hydraulic pressure short circuit, middle connecting tube one end is connected with cable short circuit, middle connecting tube and the central canal other end are connected with hydraulic pressure short circuit, hydraulic pressure short circuit is connected with sliding sleeve, it is formed with annular space between hydraulic pressure short circuit lower end and sliding sleeve, lower piston is arranged in annular space, oil duct and lower oil duct it is provided with on hydraulic pressure short circuit, upper oil duct and lower oil duct one end are connected to fuel tank by oil circuit respectively, and the other end is connected respectively to upper annulus and the bottom annular space of lower piston.
Described oil supply mechanism includes that loop, lower loop and oil circuit control, one end, upper loop are connected to fuel tank, and the other end is connected to oil duct, and upper loop is provided with the first 2/2-way solenoid directional control valve；One end, lower loop is connected to fuel tank, and the other end is connected to lower oil duct, and lower loop is provided with the second 2/2-way solenoid directional control valve；Oil circuit control includes motor, hydraulic pump and two-bit triplet solenoid directional control valve, and motor is connected with hydraulic pump, and hydraulic pump is connected respectively to fuel tank and two-bit triplet solenoid directional control valve, and two-bit triplet solenoid directional control valve is connected respectively to oil duct and lower oil duct.
Described oil supply mechanism also includes that overflow oil circuit, overflow oil circuit one end are connected to fuel tank, and the other end is connected on the oil circuit between hydraulic pump and two-bit triplet solenoid directional control valve, and overflow oil circuit is provided with overflow valve.
Being provided with pressure guide hole in described top connection, pressure guide hole one end connects with the annular space on upper piston top, the other end and top connection inner space.
Being provided with cable entry port and cable connector on described cable short circuit, cable connector is arranged on the bottom of cable entry port.
Described pressure transducer is arranged on impulse short circuit, and impulse short circuit is provided with tracting pressuring hole, tracting pressuring hole and impulse short circuit inner space.
It is additionally provided with set of cells in annular space between described cable short circuit and impulse short circuit, and set of cells is installed in same annular housing with control circuit plate.
Described motor, overflow valve, 2/2-way electromagnetic valve and two-bit triplet electromagnetic valve are installed on same ring section by screw thread, decelerator and hydraulic pump are connected on motor along axis successively, and motor, overflow valve, 2/2-way electromagnetic valve and two-bit triplet electromagnetic valve are connected with set of cells and control circuit plate by cable entry port respectively.
Employing it is an advantage of the current invention that:
One, the present invention is used, discharge capacity is pumped into by regularity regulation ground fracturing unit truck group, causing bottom pressure regularity to change, underground pressure sensor monitors the change of this down-hole pressure, and by identifying that the signal that this regular pressure change is transmitted remotely controls the switch motion of underground sliding sleeve, the switch motion of sliding sleeve can be controlled in real time, prior art all can not control the switch motion of sliding sleeve in real time, saves the time, and has only to when operating adjust fracturing unit truck group discharge capacity, simple to operate, low cost；It addition, this sliding sleeve need not pitching, latus rectum is big, and the beneficially later stage produces；After the later stage produces water, it is also possible to change bottom pressure by regulating wellhead back pressure at well head, thus control underground sliding sleeve and close, the plenty of time of saving and cost.
Two, in the present invention, described reception device includes pressure transducer, control circuit plate and instruction output unit, pressure transducer, control circuit plate and instruction output unit are sequentially connected with, pressure transducer collection contains the Pressure Fluctuation Signal of control instruction, and control instruction is sent to control circuit plate be identified, instruction output unit receives the control signal of control circuit plate identification, and according to control signal, drive system is controlled, use this mode, sliding sleeve need not pitching, latus rectum is big, the later stage is conducive to produce, after the later stage produces water, underground sliding sleeve can also be controlled by geostatic pressure change to close, the plenty of time saved and cost.
Three, in the present invention, described drive system includes fluid cylinder, lower piston and the hydraulic oil in fluid cylinder is transported to lower piston drives lower piston to do the oil supply mechanism of straight reciprocating motion, lower piston is connected drive valve motion with valve, use this structure, drive system is mainly used in promoting sliding sleeve to complete the operation opened or closed, the action that opens or closes of sliding sleeve belongs to a linear reciprocating motion, sliding sleeve valve is out toward a direction linear motion, it is then to close toward another direction linear motion, this mode makes the switch of sliding sleeve more simply, and reliability is high.
Four, in the present invention, described fluid cylinder includes connecting tube, central canal and upper piston, central canal is positioned at connecting tube, upper connecting tube and central canal one end are connected with top connection, and the upper connecting tube other end is connected with cable short circuit, and upper piston is arranged between connecting tube and central canal in the annular space formed, airtight annular space below upper piston forms the fuel tank of full hydraulic oil, use this structure, each unit construction formed and just can form fluid cylinder, it is simple to install and control.
Five, in the present invention, described cable short circuit connects middle connecting tube, impulse short circuit it is provided with between middle connecting tube and central canal, impulse short circuit connects hydraulic pressure short circuit, middle connecting tube one end is connected with cable short circuit, middle connecting tube and the central canal other end are connected with hydraulic pressure short circuit, hydraulic pressure short circuit is connected with sliding sleeve, it is formed with annular space between hydraulic pressure short circuit lower end and sliding sleeve, lower piston is arranged in annular space, oil duct and lower oil duct it is provided with on hydraulic pressure short circuit, upper oil duct and lower oil duct one end are connected to fuel tank by oil circuit respectively, the other end is connected respectively to upper annulus and the bottom annular space of lower piston, use this structure, the cable being easy to each parts connects installation, it is easy to the setting of oil circuit.
Six, in the present invention, described oil supply mechanism includes that loop, lower loop and oil circuit control, one end, upper loop are connected to fuel tank, and the other end is connected to oil duct, and upper loop is provided with the first 2/2-way solenoid directional control valve；One end, lower loop is connected to fuel tank, and the other end is connected to lower oil duct, and lower loop is provided with the second 2/2-way solenoid directional control valve；Oil circuit control includes motor, hydraulic pump and two-bit triplet solenoid directional control valve, motor is connected with hydraulic pump, hydraulic pump is connected respectively to fuel tank and two-bit triplet solenoid directional control valve, two-bit triplet solenoid directional control valve is connected respectively to oil duct and lower oil duct, use this structure, the reciprocating motion of oil-feeding control lower piston can be passed through, and hydraulic oil returns fuel tank also by oil circuit.
Seven, in the present invention, described oil supply mechanism also includes that overflow oil circuit, overflow oil circuit one end are connected to fuel tank, and the other end is connected on the oil circuit between hydraulic pump and two-bit triplet solenoid directional control valve, and overflow oil circuit is provided with overflow valve, can effectively prevent overflow.
Eight, in the present invention, described top connection being provided with pressure guide hole, pressure guide hole one end connects with the annular space on upper piston top, the other end and top connection inner space, using this structure, the annular space pressure making upper piston place is consistent with the external world, it is simple to the return of fuel feeding.
Nine, in the present invention, described pressure transducer is arranged on impulse short circuit, and impulse short circuit is provided with tracting pressuring hole, tracting pressuring hole and impulse short circuit inner space, it is simple to accurately measure oil overpressure.
Ten, in the present invention, in the annular space between described cable short circuit and impulse short circuit, it is additionally provided with set of cells, and set of cells is installed in same annular housing with control circuit plate, it is simple to the connection between set of cells and control circuit plate, and structural reliability is more preferable.
11, in the present invention, described motor, overflow valve, 2/2-way electromagnetic valve and two-bit triplet electromagnetic valve are installed on same ring section by screw thread, decelerator and hydraulic pump are connected on motor along axis successively, motor, overflow valve, 2/2-way electromagnetic valve and two-bit triplet electromagnetic valve are connected with set of cells and control circuit plate by cable entry port respectively, use this structure, more compact structure, reliability is higher.
12, compared with prior art, advantage of the present invention at least include following some:
1, present invention operation need not pitching, identical for each shift sleeve structure of same well, therefore segmentation progression is unrestricted, it is possible to realizes the transformation of maximum reservoir fine.
2, because sliding sleeve is directly actuated by ground fracturing car group, and celerity of pressure wave is very fast, therefore substantially can realize controlling in real time；Pitching sliding sleeve operation at present then needs to wait that ground pitching is fallen the time that sliding sleeve tee is spent, ageing poor.
3, sliding sleeve finishing operations is controlled by regulation wellhead back pressure, substantially can realize controlling in real time, and existing sliding sleeve needs to be operated by coiled tubing belt switch instrument, needs substantial amounts of time and cost.
Accompanying drawing explanation
Fig. 1 is control principle block diagram of the present invention
Fig. 2 is present configuration principle schematic
Fig. 3 is switching sliding sleeve structural representation of the present invention
Fig. 4 is the enlarged local section schematic diagram in A-A ' cross section in Fig. 3
Fig. 5 is the enlarged local section schematic diagram in B-B ' cross section in Fig. 3
Fig. 6 is oil supply mechanism structural principle schematic diagram of the present invention
Figure is labeled as: 1, pressure guide hole；2, upper piston；3, fuel tank；4, upper connecting tube；5, two-bit triplet solenoid directional control valve；6, the first 2/2-way solenoid directional control valve；7, the second 2/2-way solenoid directional control valve；8, overflow valve；9, motor；10, sleeve pipe；11, hydraulic pump；12, cable entry port；13, cable connector；14, cable short circuit；15, control circuit plate；16, set of cells, 17, pressure transducer；18, lower oil duct；19, upper oil duct；20, lower piston；21, seal box；22, valve；23, sliding sleeve；24, top connection；25, central canal；26, middle connecting tube；27, hydraulic pressure short circuit；28, impulse short circuit, 29, ground fracturing car group, 30, spray-hole, 31, oil pipe, 32, tracting pressuring hole.
Detailed description of the invention
Embodiment 1
A kind of geostatic pressure ripple controls the method for underground sliding sleeve, comprises the steps:
A, being simultaneously connected with multiple sliding sleeve on completion tubular column, each sliding sleeve is assigned with different command informations, G.I.H；
B, regularity adjustably face-pumping enters discharge capacity, makes down-hole pressure change according to identical rule, i.e. contains the Pressure Fluctuation Signal of control instruction to down-hole transmission；
The reception device arranged on c, each sliding sleeve all receives ground control instruction, and compares with the command information self distributed；
If d ground control instruction is different from the command information of sliding sleeve internal distribution, then sliding sleeve is failure to actuate, and continues waiting for ground control instruction next time；
If e ground control instruction is identical with the command information of sliding sleeve internal distribution, then this underground sliding sleeve action, the underground sliding sleeve completing control instruction requirement opens or closes work.
Described ground controls underground sliding sleeve and includes ground fracturing car group 29 and switching sliding sleeve, switching sliding sleeve includes receiving device, drive system and sliding sleeve 23, described reception device and drive system are arranged on sliding sleeve 23, have spray-hole 30 on the shell of described sliding sleeve 23, the valve 22 of sliding sleeve 23 has spray-hole 30；The regular adjustably face-pumping of described ground fracturing car enters the discharge capacity transmission Pressure Fluctuation Signal containing control instruction, receives device and receives control instruction and control drive system and drive valve 22 to move；Described valve 22 moves to valve spray-hole when connecting with shell spray-hole, and sliding sleeve 23 is opening, and described valve 22 moves to valve spray-hole when not connecting with shell spray-hole, and sliding sleeve 23 is closed mode.
Described reception device includes pressure transducer 17, control circuit plate 15 and instruction output unit, pressure transducer 17, control circuit plate 15 and instruction output unit are sequentially connected with, pressure transducer 17 gathers the Pressure Fluctuation Signal containing control instruction, and control instruction is sent to control circuit plate 15 be identified, instruction output unit receives the control signal of control circuit plate identification, and is controlled drive system according to control signal.
Described drive system includes fluid cylinder, lower piston 20 and the hydraulic oil in fluid cylinder is transported to lower piston drives lower piston 20 to do the oil supply mechanism of straight reciprocating motion, and lower piston 20 is connected with valve 22 and drives valve 22 to move.
Described fluid cylinder includes connecting tube 4, central canal 25 and upper piston 2, central canal 25 is positioned at connecting tube 4, upper connecting tube 4 and central canal 25 one end are connected with top connection 24, upper connecting tube 4 other end is connected with cable short circuit 14, upper piston 2 is arranged between connecting tube 4 and central canal 25 in the annular space formed, and the airtight annular space below upper piston 2 forms the fuel tank of full hydraulic oil.
Described cable short circuit 14 connects middle connecting tube 26, it is provided with impulse short circuit 28 between middle connecting tube 26 and central canal 25, impulse short circuit 28 connects hydraulic pressure short circuit 27, middle connecting tube 26 one end is connected with cable short circuit 14, middle connecting tube 26 and central canal 25 other end are connected with hydraulic pressure short circuit 27, hydraulic pressure short circuit 27 is connected with sliding sleeve 23, it is formed with annular space between hydraulic pressure short circuit 27 lower end and sliding sleeve 23, lower piston 20 is arranged in annular space, oil duct 19 and lower oil duct 18 it is provided with on hydraulic pressure short circuit 27, upper oil duct 19 and lower oil duct 18 one end are connected to fuel tank by oil circuit respectively, the other end is connected respectively to upper annulus and the bottom annular space of lower piston 20.Lower piston 20 bottom is sealed by seal box 21 with hydraulic pressure short circuit 27.
Described oil supply mechanism includes that loop, lower loop and oil circuit control, one end, upper loop are connected to fuel tank 3, and the other end is connected to oil duct 19, and upper loop is provided with the first 2/2-way solenoid directional control valve 6；One end, lower loop is connected to fuel tank 3, and the other end is connected to lower oil duct 18, and lower loop is provided with the second 2/2-way solenoid directional control valve 7；Oil circuit control includes motor 9, hydraulic pump 11 and two-bit triplet solenoid directional control valve 5, motor 9 is connected with hydraulic pump 11, hydraulic pump 11 is connected respectively to fuel tank 3 and two-bit triplet solenoid directional control valve 5, and two-bit triplet solenoid directional control valve 5 is connected respectively to oil duct 19 and lower oil duct 18.
Described oil supply mechanism also includes that overflow oil circuit, overflow oil circuit one end are connected to fuel tank 3, and the other end is connected on the oil circuit between hydraulic pump 11 and two-bit triplet solenoid directional control valve 5, and overflow oil circuit is provided with overflow valve 8.
Being provided with pressure guide hole 1 in described top connection 24, pressure guide hole 1 one end connects with the annular space on upper piston 2 top, the other end and top connection 24 inner space.
Being provided with cable entry port 12 and cable connector 13 on described cable short circuit 14, cable connector 13 is arranged on the bottom of cable entry port 12.
Described pressure transducer 17 is arranged on impulse short circuit 28, and impulse short circuit 28 is provided with tracting pressuring hole 32, tracting pressuring hole 32 and impulse short circuit 28 inner space, it is simple to accurately measure pressure in oil pipe 31.
It is additionally provided with set of cells 16 in annular space between described cable short circuit 14 and impulse short circuit 28, and set of cells 16 is installed in same annular housing with control circuit plate 15.
Described motor 9, overflow valve 8,2/2-way electromagnetic valve and two-bit triplet electromagnetic valve 5 are installed on same ring section by screw thread, decelerator and hydraulic pump 11 are connected on motor 9 along axis successively, and motor 9, overflow valve 8,2/2-way electromagnetic valve and two-bit triplet electromagnetic valve 5 are connected with set of cells 16 and control circuit plate 15 by cable entry port 12 and cable connector 13 respectively.
Power supply uses High Temperature Lithium Cell.Underground pressure sensor monitors underground pressure force value in real time.When ground fracturing unit truck group changes discharge capacity, underground pressure force value changes, control instruction is sent into down-hole simultaneously, after underground pressure sensor detects down-hole pressure change, control instruction therein is extracted, and control instruction is sent to control circuit plate be identified, if the command information that control instruction is distributed with this underground sliding sleeve is inconsistent, then control circuit plate stops carrying out next step action, continue to monitor other pressure changing informations, if the command information that control instruction is distributed with this underground sliding sleeve is consistent, then control signal regarded as by control circuit plate, hydraulic drive mechanism will be controlled by instruction output unit according to control signal.
The present invention will be described in detail below in conjunction with the accompanying drawings.Here, the exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, but not as a limitation of the invention.
Pumping into discharge capacity by regulation ground fracturing unit truck group and produce the down-hole pressure change of certain rule, the control instruction information that wherein pressure change is comprised controls underground sliding sleeve I, underground sliding sleeve II ..., underground sliding sleeve n opens or closes.Command information sends with binary coded form.The transmission form of command information has a lot, the most only illustrates as a example by binary coding.
Pumping into discharge capacity when ground fracturing unit truck group reduces, down-hole pressure reduces, and in the adjacent two down-hole pressure data that now underground pressure sensor monitors, latter data value is less than last data value, and the decline of this down-hole pressure is set as binary-coded 0；Pumping into discharge capacity when ground fracturing unit truck group improves, down-hole pressure raises, and in the adjacent two down-hole pressure data that now underground pressure sensor monitors, latter data value is more than last data value, and the rising of this down-hole pressure is set as binary-coded 1；Thus, one group change according to certain rules pump into discharge capacity and can transmit one group of specific command information to each underground sliding sleeve, the underground pressure sensor installed in underground sliding sleeve all receives the control instruction that ground sends, the most respectively the command information of control instruction with each distribution is contrasted, if control instruction and underground sliding sleeve I, underground sliding sleeve II, ..., in underground sliding sleeve n, the command information of certain several underground sliding sleeve distribution is inconsistent, then the unmatched underground sliding sleeve of command information is failure to actuate, continue waiting for ground control instruction next time, if command information and underground sliding sleeve I, underground sliding sleeve II, ..., in underground sliding sleeve n, the command information of some underground sliding sleeve distribution is consistent, then this underground sliding sleeve action, the underground sliding sleeve completing control instruction requirement opens or closes work.
As it can be seen, switching sliding sleeve includes receiving device, drive system and sliding sleeve three part.Described three parts are sequentially connected with on ground, debugged after send into down-hole, now underground sliding sleeve is closed, and the spray-hole on sliding sleeve can not connect with the sandblasting hole on valve.
Underground pressure sensor 17 at underground sliding sleeve receives the sliding sleeve of opening of ground transmission and instructs, judge to send instruction by control circuit plate the most consistent with the control instruction of underground sliding sleeve distribution, if it is consistent, control circuit plate can control the first 2/2-way electromagnetic valve 6, second 2/2-way electromagnetic valve 7 and two-bit triplet electromagnetic valve 5 action, upwards oil duct 19 fuel feeding, promote lower piston 20 descending, lower piston drives valve 22 descending, the sandblasting hole on valve 22 is made to connect with the spray-hole on sliding sleeve 23, now this underground sliding sleeve is in opening, fracture acidizing construction can be carried out.When sliding sleeve closed by needs, ground sends the underground pressure sensor 17 at underground sliding sleeve that instructs of closedown sliding sleeve and receives the closedown sliding sleeve instruction that ground sends, judge to send control instruction by control circuit plate 15 the most consistent with the command information that underground sliding sleeve distributes, if it is consistent, control circuit plate 15 can control the first 2/2-way electromagnetic valve 6, second 2/2-way electromagnetic valve 7 and two-bit triplet electromagnetic valve 5 action, oil duct 18 fuel feeding downwards, promote lower piston 20 up, lower piston 20 drives valve 22 up, the sandblasting hole on valve 22 is made to return to disconnected initial position with the spray-hole on sliding sleeve 23, now this underground sliding sleeve is closed.
Top connection 24 inwall is provided with pressure guide hole 1, makes inside and outside without pressure reduction, and top connection 24 side uses standard oil pipe 31 screw thread, and opposite side is connected with fluid cylinder.
Fluid cylinder includes connecting tube 4, central canal 25 and upper piston 2.Upper connecting tube 4 one end is connected with cable short circuit 14 with central canal 25 simultaneously, upper connecting tube 4 is connected with top connection 24 with central canal 25 other end simultaneously, in the annular space formed between upper connecting tube 4 and central canal 25, equipped with upper piston 2, upper piston 2 realizes sealing with upper connecting tube 4 inwall and central canal 25 outer wall by o sealing ring respectively, the airtight annular space of upper piston 2 lower end is full of hydraulic oil, is connected with lower oil duct 18 with upper oil duct 19 with two-bit triplet electromagnetic valve 5 by first 2/2-way electromagnetic valve the 6, second 2/2-way electromagnetic valve 7.
Set of cells 16, control circuit plate 15 are arranged on by the confined space formed between middle connecting tube 26 and central canal 25.Middle connecting tube 26 two ends realize being tightly connected with cable short circuit 14 and impulse short circuit 28 by o sealing ring respectively, and central canal 25 two ends realize being tightly connected with top connection 24 and impulse short circuit 28 by o sealing ring respectively.
Preferably motor 9, overflow valve 8,2/2-way electromagnetic valve 6,7 and two-bit triplet electromagnetic valve 5 is installed on same ring section by screw thread, decelerator and hydraulic pump 11 are connected on motor 9 along axis successively, and each part mentioned above is connected with set of cells 16 and control circuit plate 15 by cable entry port 12.Preferred battery group 16 and control circuit plate 15 are installed in same annular housing.
Preferably sliding sleeve shell 23 arranges multiple spray-hole, and valve 22 arranges multiple sandblasting hole, and sliding sleeve body need not arrange shear pin.O sealing ring is installed in preferably valve 22 outer wall spray-hole both sides.
Switching sliding sleeve can be by being connected with oil pipe or sleeve pipe 10, down-hole is sent into together with other downhole tool, after sending into down-hole, underground pressure sensor 17 in downhole electric control sliding sleeve is constantly in standby monitoring state, when ground control instruction is identical with the command information that downhole electric control sliding sleeve distributes, then downhole electric control sliding sleeve work；If the command information that ground control instruction is distributed from downhole electric control sliding sleeve is different, then downhole electric control sliding sleeve does not works, and continues to keep standby monitoring state.The work of downhole electric control sliding sleeve is not affected by construction technology.
Embodiment 2
The present invention is divided into ground control segment and down-hole executable portion two parts.Ground control segment is fracturing unit truck group；Underground part is executable portion, for automatically controlled switchable sliding sleeve.In order to meet the demand of current staged fracturing of horizontal well acidification technique, under normal circumstances, the completion tubular column of a bite well can be simultaneously connected with multiple automatically controlled switchable sliding sleeve, G.I.H together, different command informations it is assigned with inside each sliding sleeve, when ground fracturing unit truck group with certain rule adjustably face-pumping enters discharge capacity time, down-hole pressure also can change according to identical rule, i.e. to down-hole transmission containing the pressure oscillation of control instruction.The pressure transducer installed on each sliding sleeve all receives ground control instruction, and simultaneously with self distribution command information compare, if ground control instruction is different from the command information of sliding sleeve internal distribution, then sliding sleeve is failure to actuate, if ground control instruction is identical with the command information of sliding sleeve internal distribution, then sliding sleeve action.
Automatically controlled switchable sliding sleeve is down-hole executable portion.Major function is after receiving correct ground control signal, performs the action of sliding sleeve on or off.Automatically controlled switchable sliding sleeve mainly includes several parts such as power supply, pressure transducer, control circuit plate, drive system and sliding sleeve.Wherein power supply is mainly automatically controlled switchable sliding sleeve each several part and powers；Pressure transducer is for monitoring underground pressure force value in the oil pipe 31 at sliding sleeve.
15 data acquisitions of control circuit plate integrate with the function of control, and data acquisition function is mainly used in gathering the Pressure Fluctuation Signal received by pressure transducer, and control part is used for controlling drive system work.The most automatically controlled switchable sliding sleeve is in running order, the data acquisition function of control circuit plate 15 the most constantly gathers the measurement signal of pressure transducer, gathered data are filtered simultaneously, noise reduction, amplifications etc. process, and the command information of data (control signal sent by ground) and the sliding sleeve internal distribution after processing compares, if both differ, then stop further work, if both are identical, then think that sliding sleeve receives control instruction, then the part that controls of control circuit plate can be according to the control instruction received to electrohydraulic control system output electrichydraulic control signal, this signal is after overdrive system is amplified, control drive system work.Drive system is mainly used in promoting sliding sleeve to complete the operation opened or closed, the action that opens or closes of sliding sleeve belongs to a linear reciprocating motion, sliding sleeve valve is out toward a direction linear motion, being then to close toward another direction linear motion, the main task of the most electro-hydraulic drive system drives valve to realize moving back and forth exactly.Drive system includes the parts such as fluid cylinder, fuel tank, reversal valve, overflow valve, motor, hydraulic pump, decelerator.Electrichydraulic control signal control motor rotates, and drives decelerator, hydraulic pump works, controls reversal valve action simultaneously, promote fluid cylinder to move to assigned direction, thus drives valve to move to assigned direction.Sliding sleeve is the instrument realizing linking up/isolate Oil/gas Well with reservoir, by valve, sliding sleeve shell and spray-hole thereon, O RunddichtringOs etc. are constituted, and O RunddichtringO is installed on outside valve, when entering well, two groups of o RunddichtringOs on valve lay respectively at the spray-hole both sides on sliding sleeve shell, sliding sleeve is closed, and when sliding sleeve opened by needs, electro-hydraulic drive system drives valve motion, the spray-hole homonymy making two groups of o RunddichtringOs be positioned on sliding sleeve shell, makes sliding sleeve be in open mode.During as needed again to close or open, it is only necessary to repeat the reciprocating motion of valve.
Embodiment 3
The on-off control of sliding sleeve is described in detail as follows by the present embodiment:
Switching sliding sleeve closed mode:
Starting motor 9 according to control signal, two-bit triplet solenoid directional control valve 5 is in off-position and is in bottom；Hydraulic oil enters lower oil duct 18 through the second 2/2-way solenoid directional control valve 7, lower loop, valve 22 is promoted up to move, first 2/2-way solenoid directional control valve 6 is charged, valve 22 promotes the hydraulic oil of upper oil duct along upper loop while moving upward, by the first 2/2-way electromagnetic valve 6 oil sump tank 3, sliding sleeve is closed.Upper piston 2 upper space on fuel tank 3 communicates with ambient pressure environment, thus keeps the pressure in fuel tank 3 to keep consistent with ambient pressure；
Switching sliding sleeve opening:
Motor 9 and hydraulic pump 11 is started according to control signal, make two-bit triplet solenoid directional control valve 5 be in electricity condition and be in upper, hydraulic oil enters upper oil duct 19 through the first 2/2-way reversal valve 6, upper loop, valve 22 is promoted down to move, second 2/2-way solenoid directional control valve 7 is charged, valve 22 promotes the hydraulic oil of lower oil duct 18 along lower loop by the second 2/2-way solenoid directional control valve 7 oil sump tank while moving downward, moving sliding sleeve is in open mode.
Claims (7)
1. the method that a geostatic pressure ripple controls underground sliding sleeve, it is characterised in that comprise the steps:
A, being simultaneously connected with multiple sliding sleeve on completion tubular column, each sliding sleeve is assigned with different command informations, G.I.H；
B, regularity adjustably face-pumping enters discharge capacity, makes down-hole pressure change according to identical rule, i.e. contains the Pressure Fluctuation Signal of control instruction to down-hole transmission；
The reception device arranged on c, each sliding sleeve all receives ground control instruction, and compares with the command information self distributed；
If d ground control instruction is different from the command information of sliding sleeve internal distribution, then sliding sleeve is failure to actuate, and continues waiting for ground control instruction next time；
If e ground control instruction is identical with the command information of sliding sleeve internal distribution, then this underground sliding sleeve action, the underground sliding sleeve completing control instruction requirement opens or closes work；
Described ground controls underground sliding sleeve and includes ground fracturing car group and switching sliding sleeve, switching sliding sleeve includes receiving device, drive system and sliding sleeve (23), described reception device and drive system are arranged on sliding sleeve (23), have spray-hole (30) on the shell of described sliding sleeve (23), the valve of sliding sleeve has spray-hole (30)；Described ground fracturing car regularity adjustably face-pumping enters the discharge capacity transmission Pressure Fluctuation Signal containing control instruction, receives device and receives control instruction and control drive system drive valve motion；Described valve (22) moves to valve spray-hole when connecting with shell spray-hole, and sliding sleeve (23) is opening, and described valve (22) moves to valve spray-hole when not connecting with shell spray-hole, and sliding sleeve (23) is closed mode；
The fluid cylinder of described drive system includes connecting tube (4), central canal (25) and upper piston (2), central canal (25) is positioned at connecting tube (4), upper connecting tube (4) and central canal (25) one end are connected with top connection (24), upper connecting tube (4) other end is connected with cable short circuit (14), upper piston (2) is arranged between connecting tube (4) and central canal (25) in the annular space formed, and the airtight annular space of upper piston (2) lower section forms the fuel tank of full hydraulic oil；
nullDescribed cable short circuit (14) connects middle connecting tube (26)，Impulse short circuit (28) it is provided with between middle connecting tube (26) and central canal (25)，Impulse short circuit (28) connects hydraulic pressure short circuit (27)，Middle connecting tube (26) one end is connected with cable short circuit (14)，Middle connecting tube (26) and central canal (25) other end are connected with hydraulic pressure short circuit (27)，Hydraulic pressure short circuit (27) is connected with sliding sleeve (23)，Hydraulic pressure short circuit (27) is formed with annular space between lower end and sliding sleeve，Lower piston (20) is arranged in annular space，Oil duct (19) and lower oil duct (18) it is provided with on hydraulic pressure short circuit (27)，Upper oil duct (19) and lower oil duct (18) one end are connected to fuel tank (3) by oil circuit respectively，The other end is connected respectively to upper annulus and the bottom annular space of lower piston (20).
Geostatic pressure ripple the most according to claim 1 controls the method for underground sliding sleeve, it is characterized in that: described reception device includes pressure transducer (17), control circuit plate (15) and instruction output unit, pressure transducer (17), control circuit plate (15) and instruction output unit are sequentially connected with, pressure transducer (17) gathers the Pressure Fluctuation Signal containing control instruction, and command information is sent to control circuit plate (15) be identified, instruction output unit receives the control signal that control circuit plate (15) identifies, and according to control signal, drive system is controlled.
3. The method controlling underground sliding sleeve according to the geostatic pressure ripple described in claim 1 or 2, it is characterized in that: described drive system includes fluid cylinder, lower piston (20) and the hydraulic oil in fluid cylinder is transported to lower piston (20) drives lower piston (20) to do the oil supply mechanism of straight reciprocating motion, lower piston (20) is connected with valve (22) and drives valve to move.
Geostatic pressure ripple the most according to claim 3 controls the method for underground sliding sleeve, it is characterized in that: described oil supply mechanism includes loop, lower loop and oil circuit control, one end, upper loop is connected to fuel tank (3), the other end is connected to oil duct (19), and upper loop is provided with the first 2/2-way solenoid directional control valve (6)；One end, lower loop is connected to fuel tank (3), and the other end is connected to lower oil duct (18), and lower loop is provided with the second 2/2-way solenoid directional control valve (7)；Oil circuit control includes motor (9), hydraulic pump (11) and two-bit triplet solenoid directional control valve (5), motor (9) is connected with hydraulic pump (11), hydraulic pump (11) is connected respectively to fuel tank (3) and two-bit triplet solenoid directional control valve (5), and two-bit triplet solenoid directional control valve (5) is connected respectively to oil duct (19) and lower oil duct (18).
Geostatic pressure ripple the most according to claim 4 controls the method for underground sliding sleeve, it is characterized in that: described oil supply mechanism also includes overflow oil circuit, overflow oil circuit one end is connected to fuel tank (3), the other end is connected on the oil circuit between hydraulic pump (11) and two-bit triplet solenoid directional control valve (5), and overflow oil circuit is provided with overflow valve (8).
Geostatic pressure ripple the most according to claim 5 controls the method for underground sliding sleeve, it is characterized in that: in described top connection, be provided with pressure guide hole (1), pressure guide hole (1) one end connects with the annular space on upper piston (2) top, the other end and top connection (24) inner space.
Geostatic pressure ripple the most according to claim 6 controls the method for underground sliding sleeve, it is characterized in that: described pressure transducer (17) is arranged on impulse short circuit (28), tracting pressuring hole (32), tracting pressuring hole (32) and impulse short circuit (28) inner space it is provided with on impulse short circuit (28).
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Effective date of registration: 20200916 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |