CN104088602B - Method for controlling underground sliding sleeve on ground - Google Patents
Method for controlling underground sliding sleeve on ground Download PDFInfo
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- CN104088602B CN104088602B CN201410271761.0A CN201410271761A CN104088602B CN 104088602 B CN104088602 B CN 104088602B CN 201410271761 A CN201410271761 A CN 201410271761A CN 104088602 B CN104088602 B CN 104088602B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
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Abstract
The invention discloses a method for controlling an underground sliding sleeve by the ground, which comprises the following steps: the ground electromagnetic wave transmitting device generates instruction information for controlling the plurality of underground sliding sleeves to be opened or closed according to an input control instruction, and the instruction information is amplified and then is sent to the underground sliding sleeves; the electromagnetic wave receiving device arranged in each underground sliding sleeve receives the instruction information sent by the ground and compares the instruction information with the control instructions which are distributed in advance respectively; if the instruction information is inconsistent with the control instruction distributed by the underground sliding sleeve, the underground sliding sleeve with unmatched instruction information does not act, and the next ground instruction information is continuously waited; and if the instruction information is consistent with the control instruction distributed by the underground sliding sleeve, the underground sliding sleeve acts to complete the opening or closing work of the underground sliding sleeve required by the instruction information. The underground sliding sleeve can be remotely controlled to open and close through a ground electromagnetic wave signal, and the opening and closing of the sliding sleeve can be controlled in real time; and no pitching is required.
Description
Technical field
The present invention relates to a kind of method that ground 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 ground controls the method for underground sliding sleeve.The present invention can remotely control the switch motion of underground sliding sleeve by surface em ripple signal, it is possible to controls 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 control underground sliding sleeve closedown by sending electromagnetic wave signal on ground.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of ground controls the method for underground sliding sleeve, it is characterised in that comprise the steps:
A, surface em wave transmitting device, according to the control instruction of input, produce and control the command information that the multiple sliding sleeve in down-hole opens or closes, and command information sends to underground sliding sleeve after amplifying；
The electromagnetic receiving device arranged in b, each underground sliding sleeve all receives the command information that ground sends, and is contrasted with respective pre-assigned control instruction by command information respectively；
If the control instruction that c command information distributes with underground sliding sleeve is inconsistent, then the unmatched underground sliding sleeve of command information is failure to actuate, and continues waiting for surface instruction information next time；
If the control instruction that d command information distributes with underground sliding sleeve is consistent, then this underground sliding sleeve action, the underground sliding sleeve completing command information requirement opens or closes work.
Described ground controls underground sliding sleeve and includes surface em wave transmitting device and switching sliding sleeve, switching sliding sleeve includes electromagnetic receiving device, drive system and sliding sleeve, described electromagnetic receiving device and drive system are arranged on sliding sleeve, have spray-hole on the shell of described sliding sleeve, the valve of sliding sleeve has spray-hole；Described surface em wave transmitting device sends command information, and electromagnetic receiving device receives the command information of electromagnetic wave launcher transmission and controls 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 surface em wave transmitting device includes signal generator, signal amplifier and transmitting antenna, signal generator, signal amplifier and transmitting antenna are sequentially connected with, signal generator receives control instruction and produces carrier signal, after being amplified by signal amplifier, it is loaded into transmitting antenna and is sent out.
Described electromagnetic receiving device includes reception antenna, control circuit plate and instruction output unit, reception antenna, control circuit plate and instruction output unit are sequentially connected with, reception antenna receives the command information that surface em wave transmitting device sends, and command information 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.
On the centrally disposed pipe of described reception antenna, and in the annular space between cable short circuit and impulse short circuit, control circuit plate is arranged in the annular space between cable short circuit and impulse short circuit.
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, by installing electromagnetic wave dispensing device on ground, communicating with areal receiver-array antenna, to downhole transmitted control signal, down-hole accepts after antenna receives control instruction, the intrinsic valve of sliding sleeve is driven to complete switch motion by drive system, achieving the purpose controlling underground sliding sleeve work on ground, simple to operation, work efficiency is high, and 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.
Two, in the present invention, described surface em wave transmitting device includes signal generator, signal amplifier and transmitting antenna, signal generator, signal amplifier and transmitting antenna are sequentially connected with, and signal generator is received control instruction and produces carrier signal, after being amplified by signal amplifier, it is loaded into transmitting antenna to be sent out, use this mode, have only to install on ground discharger during operation, it is not necessary to ground installation is improved, install simple, low cost.
Three, in the present invention, described electromagnetic receiving device includes reception antenna, control circuit plate and instruction output unit, reception antenna, control circuit plate and instruction output unit are sequentially connected with, reception antenna receives the command information that surface em wave transmitting device sends, and command information 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 closedown can also be controlled by sending electromagnetic wave signal on ground.The plenty of time saved and cost.
Four, 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.
Five, 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.
Six, 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.
Seven, 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.
Eight, 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.
Nine, in the present invention, it is 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, use this structure, make the annular space pressure at upper piston place consistent with oil overpressure, can not only oily overpressure suffered by counterbalance annular space cavity, also allow for the return of fuel feeding.
Ten, in the present invention, on the centrally disposed pipe of described reception antenna, and in the annular space between cable short circuit and impulse short circuit, control circuit plate is arranged in the annular space between cable short circuit and impulse short circuit, use this structure, receive signal effect more preferable, and be easy to the connection of each circuit.
11, 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.
12, 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.
13, compared with prior art, advantage of the present invention at least include following some:
1, present invention operation need not pitching, does not have that the pressure break ball after fracture acidizing has been constructed is counter arranges difficult problem；Identical for each shift sleeve structure of same well, therefore segmentation progression is unrestricted, it is possible to realize the transformation of maximum reservoir fine.
2, because sliding sleeve is directly actuated by surface em ripple signal, and propagation velocity of electromagnetic 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 also controlled by electromagnetic wave, substantially can realize controlling in real time.And existing sliding sleeve needs to be operated by coiled tubing belt switch instrument, need substantial amounts of time and cost.
To sum up, the present invention is used, in the operation that sliding sleeve is opened or closed, it is not necessary to existing construction technology is produced any change or impact, it is possible to farthest combine with existing technique；And prior art is intended to by the way of pumping ball carry out sliding sleeve opening operation, and closes under sliding sleeve operation needs and enter coiled tubing belt switch instrument, take a significant amount 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, reception antenna；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, signal generator, 30, signal amplifier, 31, launch antenna, 32, spray-hole, 33, oil pipe.
Detailed description of the invention
Embodiment 1
A kind of ground controls the method for underground sliding sleeve, comprises the steps:
A, surface em wave transmitting device, according to the control instruction of input, produce and control the command information that the multiple sliding sleeve in down-hole opens or closes, and command information sends to underground sliding sleeve after amplifying；
The electromagnetic receiving device arranged in b, each underground sliding sleeve all receives the command information that ground sends, and is contrasted with respective pre-assigned control instruction by command information respectively；
If the control instruction that c command information distributes with underground sliding sleeve is inconsistent, then the unmatched underground sliding sleeve of command information is failure to actuate, and continues waiting for surface instruction information next time；
If the control instruction that d command information distributes with underground sliding sleeve is consistent, then this underground sliding sleeve action, the underground sliding sleeve completing command information requirement opens or closes work.
Described ground controls underground sliding sleeve and includes surface em wave transmitting device and switching sliding sleeve, switching sliding sleeve includes electromagnetic receiving device, drive system and sliding sleeve 23, described electromagnetic receiving device and drive system are arranged on sliding sleeve 23, have spray-hole 32 on the shell of described sliding sleeve 23, the valve 22 of sliding sleeve 23 has spray-hole 32；Described surface em wave transmitting device send command information, electromagnetic receiving device receive electromagnetic wave launcher send command information and control drive system drive valve 22 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 surface em wave transmitting device includes signal generator 29, signal amplifier 30 and launches antenna 31, signal generator 29, signal amplifier 30 and transmitting antenna 31 are sequentially connected with, signal generator 29 receives control instruction and produces carrier signal, after being amplified by signal amplifier 30, it is loaded into transmitting antenna 31 and is sent out.
Described electromagnetic receiving device includes reception antenna 17, control circuit plate 15 and instruction output unit, reception antenna 17, control circuit plate 15 and instruction output unit are sequentially connected with, reception antenna 17 receives the command information that surface em wave transmitting device sends, and command information 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.
On the described centrally disposed pipe of reception antenna 17 25, and in the annular space between cable short circuit 14 and impulse short circuit 28, control circuit plate 15 is arranged in the annular space between cable short circuit 14 and impulse short circuit 28.
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.
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.
nullThe present invention is by computer input control instruction，Signal generator produces and controls the command information that the multiple sliding sleeve in down-hole opens or closes，Command information is loaded into ground launch antenna after signal amplifier amplifies，Sent by ground launch sky bundle of lines command information，Electromagnetic receiving device built-in in each underground sliding sleeve all receives the command information that ground sends、The most respectively the control instruction of command information with each distribution is contrasted，If command information is inconsistent with the control instruction of certain several underground sliding sleeve distribution in multiple underground sliding sleeves，Then the unmatched underground sliding sleeve of command information is failure to actuate，Continue waiting for surface instruction information next time，If command information is consistent with the control instruction of some underground sliding sleeve distribution in multiple underground sliding sleeves，Then this underground sliding sleeve action，The underground sliding sleeve completing command information requirement opens or closes work.
Described computer and signal generator are used for producing command information.The control command needed to computer input by operator, and by computer, control command is loaded into signal generator.Ground launch antenna uses the dipole antenna mode being perpendicular to ground to connect up.
As it can be seen, switching sliding sleeve includes electromagnetic 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.Areal receiver-array antenna at underground sliding sleeve receives the sliding sleeve of opening of surface instruction dispensing device 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, surface instruction dispensing device can send the instruction cutting out sliding sleeve, areal receiver-array antenna 17 at underground sliding sleeve receives the cut out sliding sleeve instruction that surface instruction dispensing device sends, judge to send instruction by control circuit plate 15 the most consistent with the control instruction of underground sliding sleeve distribution, 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 33 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.
Areal receiver-array antenna 17, 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 be 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, areal receiver-array antenna 17 in downhole electric control sliding sleeve is constantly in standby monitoring state, when ground command information is identical with the control instruction that downhole electric control sliding sleeve distributes, then downhole electric control sliding sleeve work；If the control instruction that surface instruction information 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 electromagnetic wave launcher；Underground part is executable portion, for switching 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 electromagnetic wave launcher sends control instruction, each sliding sleeve all receives ground control instruction, and compare with the command information self distributed simultaneously, 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.
Surface em wave transmitting device includes computer, signal generator, signal amplifier and transmitting antenna；By to computer input control instruction, after signal generator receives the control instruction of computer, a low frequency carrier signal can be produced, after this carrier signal is amplified by signal amplifier, be loaded into transmitting antenna and be sent out.
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, electromagnetic receiving device, control circuit plate, drive system and sliding sleeve.Wherein power supply is mainly automatically controlled switchable sliding sleeve each several part and powers；Electromagnetic receiving device mainly includes that reception antenna 17 and fluxgate sensor, reception mode are to receive, by fluxgate sensor, the small exciting current that ground control signal produces on receiving antenna coil.15 data acquisitions of control circuit plate integrate with the function of control, and data acquisition function is mainly used in gathering the exciting current signal received by fluxgate, 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 exciting current signal of fluxgate, 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
A kind of ground 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 control instructions, G.I.H；
B, surface em wave transmitting device, according to the control instruction of input, produce and control the command information that the multiple sliding sleeve in down-hole opens or closes, and command information sends to underground sliding sleeve after amplifying；
The electromagnetic receiving device arranged in c, each underground sliding sleeve all receives the command information that ground sends, and is contrasted with respective pre-assigned control instruction by command information respectively；
If the control instruction that d command information distributes with underground sliding sleeve is inconsistent, then the unmatched underground sliding sleeve of command information is failure to actuate, and continues waiting for surface instruction information next time；
If the control instruction that e command information distributes with underground sliding sleeve is consistent, then this underground sliding sleeve action, the underground sliding sleeve completing command information requirement opens or closes work.
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 ground controls underground sliding sleeve, it is characterised in that comprise the steps:
A, surface em wave transmitting device, according to the control instruction of input, produce and control the command information that the multiple sliding sleeve in down-hole opens or closes, and command information sends to underground sliding sleeve after amplifying；
The electromagnetic receiving device arranged in b, each underground sliding sleeve all receives the command information that ground sends, and is contrasted with respective pre-assigned control instruction by command information respectively；
If the control instruction that c command information distributes with underground sliding sleeve is inconsistent, then the unmatched underground sliding sleeve of command information is failure to actuate, and continues waiting for surface instruction information next time；
If the control instruction that d command information distributes with underground sliding sleeve is consistent, then this underground sliding sleeve action, the underground sliding sleeve completing command information requirement opens or closes work；
Described ground controls underground sliding sleeve and includes surface em wave transmitting device and switching sliding sleeve, and switching sliding sleeve includes electromagnetic receiving device, drive system and sliding sleeve (23)；
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, and lower piston (20) is connected with valve (22) and drives valve 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 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).
Ground the most according to claim 1 controls the method for underground sliding sleeve, it is characterized in that: described electromagnetic receiving device and drive system are arranged on sliding sleeve (23), have spray-hole (32) on the shell of described sliding sleeve (23), the valve of sliding sleeve has spray-hole (32)；Described surface em wave transmitting device sends command information, and electromagnetic receiving device receives the command information of electromagnetic wave launcher transmission and controls drive system drive valve (22) 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.
Ground the most according to claim 2 controls the method for underground sliding sleeve, it is characterized in that: described surface em wave transmitting device includes signal generator (29), signal amplifier (30) and launches antenna (31), signal generator (29), signal amplifier (30) and transmitting antenna (31) are sequentially connected with, signal generator (29) receives control instruction and produces carrier signal, after being amplified by signal amplifier (30), it is loaded into transmitting antenna (31) and is sent out.
Ground the most according to claim 3 controls the method for underground sliding sleeve, it is characterized in that: described electromagnetic receiving device includes reception antenna (17), control circuit plate (15) and instruction output unit, reception antenna (17), control circuit plate (15) and instruction output unit are sequentially connected with, reception antenna (17) receives the command information that surface em wave transmitting device sends, 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.
Ground the most according to claim 4 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).
Ground the most according to claim 5 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).
Ground the most according to claim 6 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.
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Effective date of registration: 20200914 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. |