CN104088602A - Ground control method for underground sliding sleeves - Google Patents
Ground control method for underground sliding sleeves Download PDFInfo
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- CN104088602A CN104088602A CN201410271761.0A CN201410271761A CN104088602A CN 104088602 A CN104088602 A CN 104088602A CN 201410271761 A CN201410271761 A CN 201410271761A CN 104088602 A CN104088602 A CN 104088602A
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Abstract
The invention discloses a ground control method for underground sliding sleeves. The ground control method comprises the steps as follows: a ground electromagnetic wave emitting device generates command information for controlling opening or closing of a plurality of underground sliding sleeves according to input control commands, and the command information is sent to the underground sliding sleeves after amplification; an electromagnetic wave receiving device arranged in each underground sliding sleeve receives the command information sent from the ground, and the command information is compared with respective pre-assigned control commands; if the command information is not consistent with the assigned control commands of the underground sliding sleeves, the underground sliding sleeves which are not consistent with the command information do not act and continuously wait for next ground command information; and if the command information is consistent with the assigned control command of one underground sliding sleeve, the underground sliding sleeve acts and finishes opening or closing operation required by the command information. According to the ground control method for the underground sliding sleeves, opening and closing actions of the underground sliding sleeves can be remotely controlled by the ground electromagnetic wave signals and can be controlled in real time, and further, ball pitching is not required.
Description
Technical field
The present invention relates to the method for a kind of ground control well low sleeve, for staged fracturing of horizontal well acidifying transformation, belong to the completion renovation technique field of using 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 widely used in staged fracturing of horizontal well acidizing treatment tubing string at present.Oilfield horizontal well staged fracturing acidifying at present adopts mechanical type pitching sliding sleeve, opening every one-level sliding sleeve all needs to drop into the pressure break ball of correspondingly-sized, during construction, each layer of sliding sleeve opened in successively pitching from top to bottom, every one-level sliding sleeve tee internal diameter and pressure break ball internal diameter are all not identical, and from top to bottom, sliding sleeve tee and pressure break ball internal diameter increase step by step, the maximum minimum diameter that can not surpass 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, produce water, in the time of need to closing sliding sleeve, due to sliding sleeve, cannot realize and close shutoff, cause Oil & Gas Productivity to reduce and even scrap.
For example, 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 has been set forth pitching when net horizontal section operation and has been opened pressure break sandblast passage, and locking maintenance production passage is unimpeded, but still adopt 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 to move up and down respectively, open passage, can solve pitching sliding sleeve can not be for the problem of horizontal bare hole well staged fracturing, acidifying tool tubular column first paragraph, but still cannot solve the limited problem of segmentation.
Based on this, developing again some new mechanical types can switching sliding sleeve, when this class slides over fracture acidizing construction, can or be lowered to coiled tubing belt switch TO sliding sleeve by pitching, when the reservoir later stage, produce water, in the time of need to closing sliding sleeve, be lowered to coiled tubing belt switch instrument and close sliding sleeve.Patent " Intelligent sliding sleeve in a kind of selective switch slide bushing assembly " for example, publication number: CN202125290U, publication date: on 01 25th, 2012, this utility model was to utilize to be lowered to special opening-closing tool, opens and closes intelligent sliding sleeve.The greatest problem of this class sliding sleeve is that coiled tubing belt switch tool switch sliding sleeve need to be used continuous oil pipe device, and operating cost is high, and continuous oil pipe operation need to spend the plenty of time, the method complicated operation, and long construction period, cost is very very high.
To sum up, in foreign level well staged fracturing Acidizing, up-to-date sliding sleeve control method is that sliding sleeves at different levels construction are opened in pitching successively when construction, and after each layer of construction all completes, anti-row pressure blastomere also bores the ball seat in each pitching sliding sleeve, produces; In process of production, as certain one deck position or some layer of position water outlet, the sliding sleeve that descends coiled tubing band sliding sleeve switch instrument to close respective layer position; This technology can realize switching sliding sleeve, but segmentation progression is limited; In domestic staged fracturing of horizontal well Acidizing, generally application is also ball-throwing type sliding sleeve.But compared to same kind of products at abroad, this class sliding sleeve does not possess closable function of later stage.And the operation of existing pitching sliding sleeve needs to wait for that ground pitching falls the time that sliding sleeve tee spends, ageing poor.
Summary of the invention
The object of the invention is to overcome the problems referred to above that the sliding sleeve switch in existing level well staged fracturing Acidizing exists, the method for a kind of ground control well low sleeve is provided.The present invention can pass through the switch motion of surface em ripple signal Long-distance Control underground sliding sleeve, can control in real time the switch motion of sliding sleeve; And do not need pitching, latus rectum is large, when the later stage, produce after water, also can close by send electromagnetic wave signal control well low sleeve on ground.
For achieving the above object, the technical solution used in the present invention is as follows:
A method for ground control well low sleeve, is characterized in that, comprises the steps:
A, surface em wave transmitting device, according to the control instruction of input, produce the command information that under control well, a plurality of sliding sleeves open or close, and command information sends to underground sliding sleeve after amplifying;
The electromagnetic receiving device arranging in b, each underground sliding sleeve all receives the command information that ground sends, and respectively command information and pre-assigned control instruction is separately contrasted;
If the control instruction that c command information and underground sliding sleeve distribute is inconsistent, the unmatched underground sliding sleeve of command information is failure to actuate, and continues to wait for surface instruction information next time;
If d command information is consistent with the control instruction that underground sliding sleeve distributes, this underground sliding sleeve action, the underground sliding sleeve that completes command information requirement opens or closes work.
Described ground control well low sleeve comprises surface em wave transmitting device and switching sliding sleeve, switching sliding sleeve comprises electromagnetic receiving device, drive system and sliding sleeve, described electromagnetic receiving device and drive system are arranged on sliding sleeve, on the shell of described sliding sleeve, have spray-hole, on the valve of sliding sleeve, have spray-hole; Described surface em wave transmitting device sends command information, and electromagnetic receiving device receives command information the motion of control-driven system drive valve that electromagnetic wave launcher sends; When described valve moves to valve spray-hole and is communicated with shell spray-hole, sliding sleeve is opening, and when described valve moves to valve spray-hole and is not communicated with shell spray-hole, sliding sleeve is closed condition.
Described surface em wave transmitting device comprises signal generator, signal amplifier and transmitting antenna, signal generator, signal amplifier and transmitting antenna are connected successively, signal generator receives control instruction and produces carrier signal, after amplifying by signal amplifier, be loaded into transmitting antenna and outwards send.
Described electromagnetic receiving device comprises reception antenna, control circuit board and instruction output unit, reception antenna, control circuit board and instruction output unit are connected successively, reception antenna receives the command information that surface em wave transmitting device sends, and send command information to control circuit board and identify, the control signal of instruction output unit reception control circuit plate identification, and according to control signal, drive system is controlled.
Described drive system comprises fluid cylinder, lower piston and the hydraulic oil in fluid cylinder is transported to lower piston and drive lower piston to do the oil supply mechanism of straight reciprocating motion, and lower piston is connected drive valve and moves with valve.
Described fluid cylinder comprises tube connector, central tube and upper piston, central tube is positioned at tube connector, upper tube connector is connected with top connection with central tube one end, the upper tube connector other end is connected with cable short circuit, upper piston is arranged in the annular space forming between tube connector and central tube, and the airtight annular space of upper piston below forms the fuel tank that is full of hydraulic oil.
Described cable short circuit is connected with middle tube connector, between middle tube connector and central tube, be provided with impulse short circuit, impulse short circuit is connected with hydraulic pressure short circuit, middle tube connector one end is connected with cable short circuit, middle tube connector is connected with hydraulic pressure short circuit with the central tube other end, hydraulic pressure short circuit is connected with sliding sleeve, between hydraulic pressure short circuit lower end and sliding sleeve, be formed with annular space, lower piston is arranged in annular space, on hydraulic pressure short circuit, be provided with oil duct and lower oil duct, 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 comprises loop, lower loop and oil circuit control, and one end, upper loop is connected to fuel tank, and the other end is connected to oil duct, is provided with the first 2/2-way solenoid operated directional valve on upper loop; One end, lower loop is connected to fuel tank, and the other end is connected to lower oil duct, is provided with the second 2/2-way solenoid operated directional valve on lower loop; Oil circuit control comprises motor, hydraulic pump and two-bit triplet solenoid operated directional valve, and motor is connected with hydraulic pump, and hydraulic pump is connected respectively to fuel tank and two-bit triplet solenoid operated directional valve, and two-bit triplet solenoid operated directional valve is connected respectively to oil duct and lower oil duct.
Described oil supply mechanism also comprises overflow oil circuit, and overflow oil circuit one end is connected to fuel tank, and the other end is connected on the oil circuit between hydraulic pump and two-bit triplet solenoid operated directional valve, on overflow oil circuit, is provided with overflow valve.
In described top connection, be provided with pressure guide hole, pressure guide hole one end is communicated with the annular space on upper piston top, and the other end is communicated with top connection inner chamber.
On described cable short circuit, be provided with cable entry port and cable connector, cable connector is arranged on the bottom of cable entry port.
Described reception antenna is arranged on central tube, and in the annular space between cable short circuit and impulse short circuit, control circuit board is arranged in the annular space between cable short circuit and impulse short circuit.
In annular space between described cable short circuit and impulse short circuit, be also provided with battery pack, and battery pack and control circuit board are installed in same annular housing.
Described motor, overflow valve, 2/2-way electromagnetic valve and two-bit triplet electromagnetic valve are installed on same ring section by screw thread, reducer 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 control circuit board with battery pack by cable entry port respectively.
Employing the invention has the advantages that:
One, adopt the present invention, by electromagnetic wave dispensing device is installed on ground, communicate with down-hole reception antenna, to downhole transmitted control signal, down-hole is accepted antenna and is received after control instruction, by drive system, drive the intrinsic valve of sliding sleeve to complete switch motion, realized the object in ground control well low sleeve work, simple to operation, operating efficiency is high, and can control in real time the switch motion of sliding sleeve, prior art all can not be controlled the switch motion of sliding sleeve in real time.
Two, in the present invention, described surface em wave transmitting device comprises signal generator, signal amplifier and transmitting antenna, signal generator, signal amplifier and transmitting antenna are connected successively, and signal generator receives control instruction and produces carrier signal, after amplifying by signal amplifier, being loaded into transmitting antenna outwards sends, adopt this mode, during operation, only need to emitter be installed on ground, do not need ground installation to improve, install simply, cost is low.
Three, in the present invention, described electromagnetic receiving device comprises reception antenna, control circuit board and instruction output unit, reception antenna, control circuit board is connected successively with instruction output unit, reception antenna receives the command information that surface em wave transmitting device sends, and send command information to control circuit board and identify, the control signal of instruction output unit reception control circuit plate identification, and according to control signal, drive system is controlled, adopt this mode, sliding sleeve does not need pitching, latus rectum is large, be conducive to later stage production, when the later stage, produce after water, also can close by send electromagnetic wave signal control well low sleeve on ground.Plenty of time and the cost saved.
Four, in the present invention, described drive system comprises fluid cylinder, lower piston and the hydraulic oil in fluid cylinder is transported to the oil supply mechanism that lower piston drive lower piston is done straight reciprocating motion, lower piston is connected the motion of drive valve with valve, adopt this structure, drive system is mainly used in promoting sliding sleeve and completes the operation opening or closing, the action that opens or closes of sliding sleeve belongs to a linear reciprocating motion, sliding sleeve valve is out toward a direction rectilinear motion, toward another direction rectilinear motion, be to close, this mode makes the switch of sliding sleeve simpler, and reliability is high.
Five, in the present invention, described fluid cylinder comprises tube connector, central tube and upper piston, central tube is positioned at tube connector, upper tube connector is connected with top connection with central tube one end, and the upper tube connector other end is connected with cable short circuit, and upper piston is arranged in the annular space forming between tube connector and central tube, the airtight annular space of upper piston below forms the fuel tank that is full of hydraulic oil, adopt this structure, by each component combination, just form and can form fluid cylinder, be convenient to install and control.
Six, in the present invention, described cable short circuit is connected with middle tube connector, between middle tube connector and central tube, be provided with impulse short circuit, impulse short circuit is connected with hydraulic pressure short circuit, middle tube connector one end is connected with cable short circuit, middle tube connector is connected with hydraulic pressure short circuit with the central tube other end, hydraulic pressure short circuit is connected with sliding sleeve, between hydraulic pressure short circuit lower end and sliding sleeve, be formed with annular space, lower piston is arranged in annular space, on hydraulic pressure short circuit, be provided with oil duct and lower oil duct, 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, adopt this structure, be convenient to the cable connection of each parts, be convenient to the setting of oil circuit.
Seven, in the present invention, described oil supply mechanism comprises loop, lower loop and oil circuit control, and one end, upper loop is connected to fuel tank, and the other end is connected to oil duct, is provided with the first 2/2-way solenoid operated directional valve on upper loop; One end, lower loop is connected to fuel tank, and the other end is connected to lower oil duct, is provided with the second 2/2-way solenoid operated directional valve on lower loop; Oil circuit control comprises motor, hydraulic pump and two-bit triplet solenoid operated directional valve, motor is connected with hydraulic pump, hydraulic pump is connected respectively to fuel tank and two-bit triplet solenoid operated directional valve, two-bit triplet solenoid operated directional valve is connected respectively to oil duct and lower oil duct, adopt this structure, can control by fuel feeding the reciprocating motion of lower piston, and hydraulic oil also can return to fuel tank by oil circuit.
Eight, in the present invention, described oil supply mechanism also comprises overflow oil circuit, and overflow oil circuit one end is connected to fuel tank, and the other end is connected on the oil circuit between hydraulic pump and two-bit triplet solenoid operated directional valve, on overflow oil circuit, is provided with overflow valve, can effectively prevent overflow.
Nine, in the present invention, in described top connection, be provided with pressure guide hole, pressure guide hole one end is communicated with the annular space on upper piston top, the other end is communicated with top connection inner chamber, adopt this structure, make the annular space pressure at upper piston place consistent with oil pipe internal pressure, not only can the suffered oil pipe internal pressure of counterbalance annular space cavity, be also convenient to returning of fuel feeding.
Ten,, in the present invention, described reception antenna is arranged on central tube, and in the annular space between cable short circuit and impulse short circuit, control circuit board is arranged in the annular space between cable short circuit and impulse short circuit, adopt this structure, receive signal effect better, and be convenient to the connection of each circuit.
11, in the present invention, in the annular space between described cable short circuit and impulse short circuit, be also provided with battery pack, and battery pack and control circuit board be installed in same annular housing, be convenient to being connected between battery pack and control circuit board, and structural reliability be better.
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, reducer 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 control circuit board with battery pack by cable entry port respectively, adopt this structure, more compact structure, reliability is higher.
13, compared with prior art, advantage of the present invention at least comprise following some:
1, the present invention operation does not need pitching, the anti-difficult problem of arranging of pressure break ball after not existing fracture acidizing to construct; Each shift sleeve structure for same well is identical, therefore segmentation progression is unrestricted, can realize maximum reservoir fine transformation.
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 real-time control; At present pitching sliding sleeve operation needs to wait for that ground pitching falls the time that sliding sleeve tee spends, ageing poor.
3, the operation of sliding sleeve later stage is also controlled by electromagnetic wave, substantially can realize real-time control.And existing sliding sleeve need to operate by coiled tubing belt switch instrument, need a large amount of time and cost.
To sum up, adopt the present invention, in the operation that sliding sleeve is opened or closed, do not need existing construction technology to produce any change or impact, can farthest combine with existing technique; And prior art all will be carried out opening operation to sliding sleeve by the mode of pumping ball, and close sliding sleeve action need, be lowered to coiled tubing belt switch instrument, cost plenty of time and cost.
Accompanying drawing explanation
Fig. 1 is control principle block diagram of the present invention
Fig. 2 is structural principle schematic diagram of the present invention
Fig. 3 is switching sliding sleeve structural representation of the present invention
Fig. 4 is the local amplification profile schematic diagram in A-A ' cross section in Fig. 3
Fig. 5 is the local amplification profile schematic diagram in B-B ' cross section in Fig. 3
Fig. 6 is oil supply mechanism structural principle schematic diagram of the present invention
In figure, be labeled as: 1, pressure guide hole; 2, upper piston; 3, fuel tank; 4, upper tube connector; 5, two-bit triplet solenoid operated directional valve; 6, the first 2/2-way solenoid operated directional valve; 7, the second 2/2-way solenoid operated directional 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 board; 16, battery pack, 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 tube; 26, middle tube connector; 27, hydraulic pressure short circuit; 28, impulse short circuit, 29, signal generator, 30, signal amplifier, 31, transmitting antenna, 32, spray-hole, 33, oil pipe.
The specific embodiment
Embodiment 1
A method for ground control well low sleeve, comprises the steps:
A, surface em wave transmitting device, according to the control instruction of input, produce the command information that under control well, a plurality of sliding sleeves open or close, and command information sends to underground sliding sleeve after amplifying;
The electromagnetic receiving device arranging in b, each underground sliding sleeve all receives the command information that ground sends, and respectively command information and pre-assigned control instruction is separately contrasted;
If the control instruction that c command information and underground sliding sleeve distribute is inconsistent, the unmatched underground sliding sleeve of command information is failure to actuate, and continues to wait for surface instruction information next time;
If d command information is consistent with the control instruction that underground sliding sleeve distributes, this underground sliding sleeve action, the underground sliding sleeve that completes command information requirement opens or closes work.
Described ground control well low sleeve comprises surface em wave transmitting device and switching sliding sleeve, switching sliding sleeve comprises electromagnetic receiving device, drive system and sliding sleeve 23, described electromagnetic receiving device and drive system are arranged on sliding sleeve 23, on the shell of described sliding sleeve 23, have spray-hole 32, on the valve 22 of sliding sleeve 23, have spray-hole 32; Described surface em wave transmitting device sends command information, and electromagnetic receiving device receives command information 22 motions of control-driven system drive valve that electromagnetic wave launcher sends; When described valve 22 moves to valve spray-hole and is communicated with shell spray-hole, sliding sleeve 23 is opening, and when described valve 22 moves to valve spray-hole and is not communicated with shell spray-hole, sliding sleeve 23 is closed condition.
Described surface em wave transmitting device comprises signal generator 29, signal amplifier 30 and transmitting antenna 31, signal generator 29, signal amplifier 30 and transmitting antenna 31 are connected successively, signal generator 29 receives control instruction and produces carrier signal, after amplifying by signal amplifier 30, be loaded into transmitting antenna 31 and outwards send.
Described electromagnetic receiving device comprises reception antenna 17, control circuit board 15 and instruction output unit, reception antenna 17, control circuit board 15 and instruction output unit are connected successively, reception antenna 17 receives the command information that surface em wave transmitting device sends, and send command information to control circuit board 15 and identify, the control signal of instruction output unit reception control circuit plate identification, and according to control signal, drive system is controlled.
Described drive system comprises fluid cylinder, lower piston 20 and the hydraulic oil in fluid cylinder is transported to lower piston and drive lower piston 20 to do the oil supply mechanism of straight reciprocating motion, and lower piston 20 is connected drive valve 22 and moves with valve 22.
Described fluid cylinder comprises tube connector 4, central tube 25 and upper piston 2, central tube 25 is positioned at tube connector 4, upper tube connector 4 is connected with top connection 24 with central tube 25 one end, upper tube connector 4 other ends are connected with cable short circuit 14, upper piston 2 is arranged in the annular space forming between tube connector 4 and central tube 25, and the airtight annular space of upper piston 2 belows forms the fuel tank that is full of hydraulic oil.
Described cable short circuit 14 is connected with middle tube connector 26, between middle tube connector 26 and central tube 25, be provided with impulse short circuit 28, impulse short circuit 28 is connected with hydraulic pressure short circuit 27, middle tube connector 26 one end are connected with cable short circuit 14, middle tube connector 26 is connected with hydraulic pressure short circuit 27 with central tube 25 other ends, hydraulic pressure short circuit 27 is connected with sliding sleeve 23, between hydraulic pressure short circuit 27 lower ends and sliding sleeve 23, be formed with annular space, lower piston 20 is arranged in annular space, on hydraulic pressure short circuit 27, be provided with oil duct 19 and lower oil duct 18, 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 bottoms and hydraulic pressure short circuit 27 seal by seal box 21.
Described oil supply mechanism comprises loop, lower loop and oil circuit control, and one end, upper loop is connected to fuel tank 3, and the other end is connected to oil duct 19, is provided with the first 2/2-way solenoid operated directional valve 6 on upper loop; One end, lower loop is connected to fuel tank 3, and the other end is connected to lower oil duct 18, is provided with the second 2/2-way solenoid operated directional valve 7 on lower loop; Oil circuit control comprises motor 9, hydraulic pump 11 and two-bit triplet solenoid operated directional 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 operated directional valve 5, and two-bit triplet solenoid operated directional valve 5 is connected respectively to oil duct 19 and lower oil duct 18.
Described oil supply mechanism also comprises overflow oil circuit, and overflow oil circuit one end is connected to fuel tank 3, and the other end is connected on the oil circuit between hydraulic pump 11 and two-bit triplet solenoid operated directional valve 5, is provided with overflow valve 8 on overflow oil circuit.
In described top connection 24, be provided with pressure guide hole 1, pressure guide hole 1 one end is communicated with the annular space on upper piston 2 tops, and the other end is communicated with top connection 24 inner chambers.
On described cable short circuit 14, be provided with cable entry port 12 and cable connector 13, cable connector 13 is arranged on the bottom of cable entry port 12.
Described reception antenna 17 is arranged on central tube 25, and in the annular space between cable short circuit 14 and impulse short circuit 28, control circuit board 15 is arranged in the annular space between cable short circuit 14 and impulse short circuit 28.
In annular space between described cable short circuit 14 and impulse short circuit 28, be also provided with battery pack 16, and battery pack 16 is installed in same annular housing with control circuit board 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, reducer 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 control circuit board 15 with battery pack 16 with cable connector 13 by cable entry port 12 respectively.
Below in conjunction with accompanying drawing, the present invention will be described in detail.At this, exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, but not as a limitation of the invention.
The present invention is by computer input control instruction, signal generator produces the command information that under control well, a plurality of sliding sleeves open or close, command information is loaded into ground transmitting antenna after signal amplifier amplifies, by ground transmitting antenna, command information is sent, in each underground sliding sleeve, built-in electromagnetic receiving device all receives the command information that ground sends, respectively command information and the control instruction of distributing are separately contrasted simultaneously, if the control instruction that in command information and a plurality of underground sliding sleeve, certain several underground sliding sleeve distributes is inconsistent, the unmatched underground sliding sleeve of command information is failure to actuate, continue to wait for surface instruction information next time, if command information is consistent with the control instruction that in a plurality of underground sliding sleeves, some underground sliding sleeves distribute, this underground sliding sleeve action, the underground sliding sleeve that completes command information requirement opens or closes work.
Described computer and signal generator are for generation of command information.The control command needing to computer input by operating personnel, and by computer, control command is loaded into signal generator.Ground transmitting antenna adopts the dipole antenna mode perpendicular to ground to connect up.
As shown in the figure, switching sliding sleeve comprises electromagnetic receiving device, drive system and sliding sleeve three parts.Described three parts are sent into down-hole after connecting successively, debugged on ground, and now underground sliding sleeve is in closed condition, and the spray-hole on sliding sleeve can not be communicated with the sandblast hole on valve.When what the down-hole at underground sliding sleeve place reception antenna received that surface instruction dispensing device sends, open sliding sleeve instruction, by control circuit board, judge that whether transmission instruction is consistent with the control instruction that underground sliding sleeve distributes, if consistent, control circuit board can be controlled the first 2/2-way electromagnetic valve 6, the second 2/2-way electromagnetic valve 7 and 5 actions of two-bit triplet electromagnetic valve, oil duct 19 fuel feeding make progress, promote lower piston 20 descending, lower piston drives valve 22 descending, sandblast hole on valve 22 is communicated with the spray-hole on sliding sleeve 23, now this underground sliding sleeve is in opening, can carry out fracture acidizing construction.When needs are closed sliding sleeve, surface instruction dispensing device can send the instruction of cutting out sliding sleeve, when what the down-hole at underground sliding sleeve place reception antenna 17 received that surface instruction dispensing device sends, close sliding sleeve instruction, by control circuit board 15 judgements, send instruction whether consistent with the control instruction that underground sliding sleeve distributes, if consistent, control circuit board 15 can be controlled the first 2/2-way electromagnetic valve 6, the second 2/2-way electromagnetic valve 7 and 5 actions of two-bit triplet electromagnetic valve, downward oil duct 18 fuel feeding, promote lower piston 20 up, lower piston 20 drives valve 22 up, make sandblast hole on valve 22 and the spray-hole on sliding sleeve 23 get back to disconnected initial position, now this underground sliding sleeve is in closed condition.
Top connection 24 inwalls are provided with pressure guide hole 1, and inside and outside making, without pressure reduction, top connection 24 1 sides adopt standard oil pipe 33 screw threads, and opposite side is connected with fluid cylinder.
Fluid cylinder comprises tube connector 4, central tube 25 and upper piston 2.Upper tube connector 4 one end are connected with cable short circuit 14 with central tube 25 simultaneously, upper tube connector 4 is connected with top connection 24 with central tube 25 other ends simultaneously, between upper tube connector 4 and central tube 25 in formed annular space, upper piston 2 is housed, upper piston 2 is respectively by o sealing ring and upper tube connector 4 inwalls and central tube 25 outer walls realization sealings, the airtight annular space of upper piston 2 lower ends is full of hydraulic oil, by the first 2/2-way electromagnetic valve 6, the second 2/2-way electromagnetic valve 7 and two-bit triplet electromagnetic valve 5, is communicated with lower oil duct 18 with upper oil duct 19.
Down-hole reception antenna 17, battery pack 16, control circuit board 15 be arranged on by between tube connector 26 and central tube 25 in formed confined space.Middle tube connector 26 two ends are realized and being tightly connected with impulse short circuit 28 by o sealing ring and cable short circuit 14 respectively, and central tube 25 two ends are realized and being tightly connected with impulse short circuit 28 by o sealing ring and top connection 24 respectively.
Preferred motor 9, overflow valve 8,2/2-way electromagnetic valve 6,7 and two-bit triplet electromagnetic valve 5 by screw thread, be installed on same ring section, reducer and hydraulic pump 11 are connected on motor 9 along axis successively, and each part mentioned above is connected with control circuit board 15 with battery pack 16 by cable entry port 12.Preferred battery group 16 is installed in same annular housing with control circuit board 15.
Preferably sliding sleeve shell 23 arranges a plurality of spray-holes, and valve 22 arranges a plurality of sandblasts hole, and sliding sleeve body does not need to arrange shear pin.Preferably o sealing ring is installed in valve 22 outer wall spray-hole both sides.
Switching sliding sleeve can be by being connected with oil pipe or sleeve pipe 10, send into down-hole together with other downhole tool, send into behind down-hole, down-hole reception antenna 17 in the automatically controlled sliding sleeve in down-hole is always in standby monitoring state, the control instruction of distributing when the automatically controlled sliding sleeve in ground command information and down-hole is identical, the automatically controlled sliding sleeve work in down-hole; If surface instruction information is different from the control instruction that the automatically controlled sliding sleeve in down-hole distributes, the automatically controlled sliding sleeve in down-hole is not worked, and continues to keep standby monitoring state.The work of the automatically controlled sliding sleeve in down-hole is not affected by construction technology.
Embodiment 2
The present invention is divided into ground control section and down-hole operating part two parts.Ground control section is electromagnetic wave launcher; Down-hole part is operating part, is switching sliding sleeve.In order to meet the demand of current staged fracturing of horizontal well acidification technique, generally, on the completion tubular column of a bite well, can connect simultaneously a plurality of automatically controlled can switching sliding sleeve, G.I.H together, each sliding sleeve inside is all assigned different command informations, when the electromagnetic wave launcher sending controling instruction of ground, each sliding sleeve all receives ground control instruction, and compare with the command information self distributing simultaneously, if ground control instruction is different from the command information of sliding sleeve internal distribution, sliding sleeve is failure to actuate, if ground control instruction is identical with the command information of sliding sleeve internal distribution, sliding sleeve action.
Surface em wave transmitting device comprises computer, signal generator, signal amplifier and transmitting antenna; By to computer input control instruction, when signal generator receives after the control instruction of computer, can produce a low frequency carrier signal signal, this carrier signal is loaded into transmitting antenna and outwards sends after amplifying by signal amplifier.
Automatically controlled can switching sliding sleeve be down-hole operating part.Major function, for after receiving correct ground control signal, is carried out the action that sliding sleeve is opened or closed.Automatically controlledly can mainly comprise several parts such as power supply, electromagnetic receiving device, control circuit board, drive system and sliding sleeve by switching sliding sleeve.Wherein power supply is mainly automatically controlled can power supply by switching sliding sleeve each several part; Electromagnetic receiving device mainly comprises reception antenna 17 and fluxgate sensor, and receive mode is for to receive by fluxgate sensor the small exciting current that ground control signal produces on receiving antenna coil.Control circuit board 15 integrates the function of data acquisition and control, and data acquisition function is mainly used in gathering the received exciting current signal of fluxgate, and control section is for control-driven system work.Once automatically controlled can switching sliding sleeve in running order, the data acquisition function of control circuit board 15 just constantly gathers the exciting current signal of fluxgate, institute's image data is carried out to filtering simultaneously, noise reduction, the processing such as amplification, and the data (control signal sending for ground) after processing and the command information of sliding sleeve internal distribution are compared, if both are not identical, stop further work, if both are identical, think that sliding sleeve receives control instruction, the control part branch of control circuit board exports electrichydraulic control signal according to the control instruction receiving to electrohydraulic control system, this signal is after overdrive system is amplified, control-driven system work.Drive system is mainly used in promoting sliding sleeve and completes the operation opening or closing, the action that opens or closes of sliding sleeve belongs to a linear reciprocating motion, sliding sleeve valve is out toward a direction rectilinear motion, toward another direction rectilinear motion, be to close, therefore the main task of electric liquid drive system drives valve to realize reciprocating motion exactly.Drive system comprises the parts such as fluid cylinder, fuel tank, reversal valve, overflow valve, motor, hydraulic pump, reducer.The rotation of electrichydraulic control signal control motor, drives reducer, hydraulic pump works, controls reversal valve action simultaneously, promotes fluid cylinder and moves to assigned direction, thereby drive valve to move to assigned direction.The instrument of link up for realizing/isolation Oil/gas Well of sliding sleeve and reservoir, by valve, sliding sleeve shell and on spray-hole, the formations such as O RunddichtringO, O RunddichtringO is installed on valve outside, while entering well, two groups of o RunddichtringOs on valve lay respectively at the spray-hole both sides on sliding sleeve shell, sliding sleeve is in closed condition, and when needs are opened sliding sleeve, electric liquid drive system drives valve motion, make two groups of o RunddichtringOs be positioned at the spray-hole homonymy on sliding sleeve shell, make sliding sleeve in open mode.When closing or opening as needed again, only need to repeat the reciprocating motion of valve.
Embodiment 3
A method for ground control well low sleeve, comprises the steps:
A, on completion tubular column, connect a plurality of sliding sleeves, each sliding sleeve is all assigned different control instructions, G.I.H simultaneously;
B, surface em wave transmitting device, according to the control instruction of input, produce the command information that under control well, a plurality of sliding sleeves open or close, and command information sends to underground sliding sleeve after amplifying;
The electromagnetic receiving device arranging in c, each underground sliding sleeve all receives the command information that ground sends, and respectively command information and pre-assigned control instruction is separately contrasted;
If the control instruction that d command information and underground sliding sleeve distribute is inconsistent, the unmatched underground sliding sleeve of command information is failure to actuate, and continues to wait for surface instruction information next time;
If e command information is consistent with the control instruction that underground sliding sleeve distributes, this underground sliding sleeve action, the underground sliding sleeve that completes command information requirement opens or closes work.
Switching sliding sleeve closed condition:
According to control signal starter motor 9, two-bit triplet solenoid operated directional valve 5 is in off-position and in the next; Hydraulic oil enters lower oil duct 18 through the second 2/2-way solenoid operated directional valve 7, lower loop, promoting valve 22 up moves, the first 2/2-way solenoid operated directional valve 6 is charged, the hydraulic oil that promotes upper oil duct when valve 22 moves upward is along upper loop, by the first 2/2-way electromagnetic valve 6 oil sump tanks 3, sliding sleeve is in closed condition.Upper piston 2 upper spaces on fuel tank 3 communicate with ambient pressure environment, keep thus pressure and environment stress in fuel tank 3 to be consistent;
Switching sliding sleeve opening:
According to control signal starter motor 9 and hydraulic pump 11, make two-bit triplet solenoid operated directional valve 5 in electricity condition and in upper, hydraulic oil enters upper oil duct 19 through the first 2/2-way reversal valve 6, upper loop, promoting valve 22 down moves, the second 2/2-way solenoid operated directional valve 7 is charged, the hydraulic oil that promotes lower oil duct 18 when valve 22 moves downward passes through the second 2/2-way solenoid operated directional valve 7 oil sump tanks along lower loop, moving sliding sleeve is in open mode.
Claims (10)
1. a method for ground control well low sleeve, is characterized in that, comprises the steps:
A, surface em wave transmitting device, according to the control instruction of input, produce the command information that under control well, a plurality of sliding sleeves open or close, and command information sends to underground sliding sleeve after amplifying;
The electromagnetic receiving device arranging in b, each underground sliding sleeve all receives the command information that ground sends, and respectively command information and pre-assigned control instruction is separately contrasted;
If the control instruction that c command information and underground sliding sleeve distribute is inconsistent, the unmatched underground sliding sleeve of command information is failure to actuate, and continues to wait for surface instruction information next time;
If d command information is consistent with the control instruction that underground sliding sleeve distributes, this underground sliding sleeve action, the underground sliding sleeve that completes command information requirement opens or closes work.
2. the method for ground according to claim 1 control well low sleeve, it is characterized in that: described ground control well low sleeve comprises surface em wave transmitting device and switching sliding sleeve, switching sliding sleeve comprises electromagnetic receiving device, drive system and sliding sleeve (23), described electromagnetic receiving device and drive system are arranged on sliding sleeve (23), on the shell of described sliding sleeve (23), have spray-hole (32), on the valve of sliding sleeve, have spray-hole (32); Described surface em wave transmitting device sends command information, and electromagnetic receiving device receives command information control-driven system drive valve (22) motion that electromagnetic wave launcher sends; When described valve (22) moves to valve spray-hole and is communicated with shell spray-hole, sliding sleeve (23) is opening, and when described valve (22) moves to valve spray-hole and is not communicated with shell spray-hole, sliding sleeve (23) is closed condition.
3. the method for ground according to claim 2 control well low sleeve, it is characterized in that: described surface em wave transmitting device comprises signal generator (29), signal amplifier (30) and transmitting antenna (31), signal generator (29), signal amplifier (30) and transmitting antenna (31) are connected successively, signal generator (29) receives control instruction and produces carrier signal, after amplifying by signal amplifier (30), be loaded into transmitting antenna (31) and outwards send.
4. the method for ground according to claim 3 control well low sleeve, it is characterized in that: described electromagnetic receiving device comprises reception antenna (17), control circuit board (15) and instruction output unit, reception antenna (17), control circuit board (15) is connected successively with instruction output unit, reception antenna (17) receives the command information that surface em wave transmitting device sends, and send command information to control circuit board (15) and identify, the control signal of instruction output unit reception control circuit plate (15) identification, and according to control signal, drive system is controlled.
5. according to the method for the ground control well low sleeve described in claim 1,2,3 or 4, it is characterized in that: described drive system comprises fluid cylinder, lower piston (20) and the hydraulic oil in fluid cylinder is transported to lower piston (20) and drive lower piston (20) to do the oil supply mechanism of straight reciprocating motion, lower piston (20) is connected drive valve and moves with valve (22).
6. the method for ground according to claim 5 control well low sleeve, it is characterized in that: described fluid cylinder comprises tube connector (4), central tube (25) and upper piston (2), central tube (25) is positioned at tube connector (4), upper tube connector (4) is connected with top connection (24) with central tube (25) one end, upper tube connector (4) other end is connected with cable short circuit (14), upper piston (2) is arranged in the annular space forming between tube connector (4) and central tube (25), the airtight annular space of upper piston (2) below forms the fuel tank that is full of hydraulic oil.
7. the method for ground according to claim 6 control well low sleeve, it is characterized in that: described cable short circuit (14) is connected with middle tube connector (26), between middle tube connector (26) and central tube (25), be provided with impulse short circuit (28), impulse short circuit (28) is connected with hydraulic pressure short circuit (27), middle tube connector (26) one end is connected with cable short circuit (14), middle tube connector (26) is connected with hydraulic pressure short circuit (27) with central tube (25) other end, hydraulic pressure short circuit (27) is connected with sliding sleeve (23), between hydraulic pressure short circuit (27) lower end and sliding sleeve, be formed with annular space, lower piston (20) is arranged in annular space, on hydraulic pressure short circuit (27), be provided with oil duct (19) and lower oil duct (18), 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).
8. the method for ground according to claim 7 control well low sleeve, it is characterized in that: described oil supply mechanism comprises 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), is provided with the first 2/2-way solenoid operated directional valve (6) on upper loop; One end, lower loop is connected to fuel tank (3), and the other end is connected to lower oil duct (18), is provided with the second 2/2-way solenoid operated directional valve (7) on lower loop; Oil circuit control comprises motor (9), hydraulic pump (11) and two-bit triplet solenoid operated directional 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 operated directional valve (5), and two-bit triplet solenoid operated directional valve (5) is connected respectively to oil duct (19) and lower oil duct (18).
9. the method for ground according to claim 8 control well low sleeve, it is characterized in that: described oil supply mechanism also comprises 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 operated directional valve (5), is provided with overflow valve (8) on overflow oil circuit.
10. according to the method for the ground control well low sleeve described in claim 6,7,8 or 9, it is characterized in that: in described top connection, be provided with pressure guide hole (1), pressure guide hole (1) one end is communicated with the annular space on upper piston (2) top, and the other end is communicated with top connection (24) inner chamber.
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