CN102678044B - Well drilling rod and pulse plasma drilling machine system - Google Patents
Well drilling rod and pulse plasma drilling machine system Download PDFInfo
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- CN102678044B CN102678044B CN201210184371.0A CN201210184371A CN102678044B CN 102678044 B CN102678044 B CN 102678044B CN 201210184371 A CN201210184371 A CN 201210184371A CN 102678044 B CN102678044 B CN 102678044B
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Abstract
The invention discloses a well drilling rod and a pulse plasma drilling machine system. The well drilling rod comprises at least one well drilling rod unit, wherein each well drilling rod unit comprises at least two open-close type support rings and a connecting rod; two adjacent support rings are fixedly connected through one connecting rod; the well drilling rod units are connected in sequence; and two adjacent support rings of two adjacent well drilling units are fixedly connected. The well drilling machine system comprises a well drilling mechanism comprising the well drilling rod, a high-pressure pulse power supply, a high-pressure low-wave impedance coaxial water cable, a water circulating device and a drill bit electrode for discharging towards rock stone, so that the drill bit electrode can be always contacted with the rock stone and keep drilling vertically downwards, and the problems of collapse of a water pipe and a cable and the like occurring during deep drilling in the conventional plasma drilling machine are avoided simultaneously; and moreover, the length of the well drilling rod is adjusted by increasing or decreasing the well drilling rod units, so that well drilling of different depths can be realized.
Description
Technical field
The invention belongs to oil-gas exploration and development technical field, thereby be specifically related to a kind of pulsed plasma borer system of realizing drilling well for catalase.
Background technology
Outstanding day by day along with the rapid growth of global Oil Gas demand and Land petroleum crisis of resource problem, the exploration and development of marine oil and gas resource becomes most important.Developing the advanced huge precious resources of drilling equipment exploitation China's marine field, is an urgent demand of China's oil gas strategy.
Traditional boring method has mechanical boring method and conventional blasting method method.Machine drilling method is utilized the advantages such as impact and the shear action of drilling tool to rock produces stress rupture, and the method has simple in structure, easy to operate, and fractured rock speed is fast, but drilling tool is easy to wear when broken to hard rock, and energy consumption is high.Blasting procedure is the fragmentation that the chemical energy that utilizes material generation chemical reaction to discharge causes rock, has detonation velocity fast, simple operation and other advantages, but exist broken disturbance large, harmful chemical produces, the shortcomings such as pass irregularity.
Some emerging rock boring methods constantly develop.Supercritical ultrasonics technology is to utilize the drilling tool of high-frequency short arc double vibrations to cause the fragmentation of rock, and the method is only just effective to the rock of fragility.The broken method of electron beam is to utilize the heat effect of high-power electron beam to reach the object of catalase, but high-power electron beam accelerator is expensive, and it is not very convenient using.Cavitating water jet method is the impact force utilizing bubble to crumble and fall to produce and the impact force fractured rock of high-pressure water head, has the features such as safe, clean and efficient, but higher to the technological requirement of wanting summation device of nozzle.
Utilizing pulsed plasma to realize quick rock rapid drilling is a kind of technology of developing in recent years.Under the high pressure short pulse effect of hundred nanosecond rise times, the electric breakdown field strength of rock is less than the electric breakdown field strength of water and transformer oil.Take water or transformer oil as dielectric, on the surface of rock, place one or more pairs of high earthing electrodes, loading after high-voltage pulse, can realize effectively puncturing of rock.The countries and regions such as current Russia, the European Community, Japan and the U.S. are all studied and develop this technology.The Badger Plasma Technology that set up in March, 2007 is a company that develops specially and manage pulsed plasma drilling technology.In the existing pulsed plasma drilling technology of having developed, drill configuration drillability is poor, can not realize the drilling well of the degree of depth.Take the american documentation literature US2005/0140688A1 of MacGregor etc. as example, the water inlet pipe of rig and outlet pipe are fixed in bit electrode, utilize bit electrode connector by bit electrode and high-voltage pulse transmission line links together and utilize the gravity of bit electrode connector that bit electrode and rock are kept in touch.Such device enters to bore means for correcting without bit electrode, only depend on the gravity of bit electrode connector can not guarantee vertically lower boring of bit electrode, in the situation that having external disturbance, bit electrode may depart from vertical direction, once there is this situation, will there is the situation of " stuck " and cisco unity malfunction in bit electrode.Because water inlet pipe and outlet pipe do not have braced structures, when drilling well arrives certain depth, water pipe caves in because of Action of Gravity Field, and rig can not be worked constantly.
Summary of the invention
The object of this invention is to provide a kind of drilling rod and pulsed plasma borer system that utilizes high pressure pulse discharge fractured rock to realize rapid drilling.
For achieving the above object, the technical solution used in the present invention is as follows:
Drilling rod of the present invention comprises at least one drilling rod unit, each drilling rod unit comprises at least two opening-closing type support rings and connecting rod, described support ring is provided with cable through-hole, drain-pipe through-hole and connecting rod through hole, by run through adjacent two support rings corresponding connecting rod through hole described connecting rod and two adjacent support rings are fixed together; Each drilling rod unit connects successively, and two adjacent support rings of adjacent two drilling rod unit are fixedly connected with.
Pulsed plasma borer system of the present invention comprises drilling well mechanism, high-voltage pulse power source, high-voltage low-wave impedance coaxial water cable, water circle device and the bit electrode for discharging to rock; Described bit electrode comprises high-field electrode and earthing electrode; Described high-voltage low-wave impedance coaxial water cable includes water inlet pipe, center conductor, dielectric, outer contact and the sheath of coaxial setting from inside to outside successively; The High voltage output terminal of described high-voltage pulse power source is electrically connected with the input of the center conductor of high-voltage low-wave impedance coaxial water cable, and low-voltage output of high-voltage pulse power source is electrically connected with the input of the outer contact of high-voltage low-wave impedance coaxial water cable; Described water circle device comprise can obtain deionized water water purification installation, reservoir, intake pump, go out water pump and gutter, the water inlet of reservoir is communicated with the delivery port of water purification installation, the delivery port of reservoir is communicated with the water inlet of intake pump, the delivery port of intake pump is communicated with the water inlet of the water inlet pipe of high-voltage low-wave impedance coaxial water cable, go out the water inlet of water pump and the delivery port of gutter is communicated with, go out the delivery port of water pump and the water inlet of water purification installation is communicated with; Described drilling well mechanism comprises frame, described drilling rod, gravity platen, at least two guide pegs, upper limit position switch, lower position switch, the first fixed pulley, the second fixed pulley, the 3rd fixed pulley and winch, and the first fixed pulley, the second fixed pulley, the 3rd fixed pulley, guide peg, upper limit position switch and lower position switch are fixed in frame; Gravity platen is provided with the through hole that high-voltage low-wave impedance coaxial water cable and gutter are passed through, and gravity platen is placed in the top of described drilling rod, and one end of the hawser of winch is fixedly connected with gravity platen after via the 3rd fixed pulley, and guide peg is through gravity platen; Upper limit position switch and lower position switch are for limiting the stroke of the upper and lower motion of gravity platen, gravity platen can slide onto lower position switch downwards and stop along guide peg under self gravitation effect, and utilize the hawser of winch gravity pressure rim guide peg can be promoted to upper limit position switch and stop, thereby gravity platen is moved back and forth up and down between upper limit position switch and lower position switch; Described high-voltage low-wave impedance coaxial water cable via the first fixed pulley after from top to bottom successively through set cable through-hole on each support ring of gravity platen, drilling rod, the output of the center conductor of high-voltage low-wave impedance coaxial water cable is electrically connected with high-field electrode, and the output of the outer contact of high-voltage low-wave impedance coaxial water cable is electrically connected with earthing electrode; The drain-pipe through-hole that described gutter from top to bottom arranges on the each support ring through gravity platen, drilling rod after via the second fixed pulley successively, the water inlet end of gutter is fixedly connected with earthing electrode, cavity between high-field electrode and earthing electrode is communicated with the water inlet of gutter, and the bottom of drilling rod is fixedly connected with the upper end of earthing electrode; Described water inlet pipe is communicated with the cavity between high-field electrode and earthing electrode, and the deionized water in water inlet pipe can flow in the cavity between high-field electrode and earthing electrode.
Further, deionization electrical conductivity of water of the present invention is less than or equal to 100 μ S/cm.
Further, the crest voltage of high-voltage pulse power source output of the present invention is 30～100kV, and the rising front of pulse is less than 100ns, and the width of pulse is less than 5 μ s, pulse frequency 10～300Hz, and single pulse energy is 10 ~ 300J.
Compared with prior art, the effect that the present invention is useful is:
(1), by using the drilling rod of rigidity, by fixing wherein to high-voltage low-wave impedance coaxial water cable and water inlet pipe, the problems such as water pipe that traditional plasma rig there will be when degree of depth drilling well and cable subside have been avoided.
(2) number of the drilling rod unit of connecting by change regulates the length of drilling rod, can realize the drilling well of different depth.Due to creep into support ring in bar unit be can folding structure, thereby whole drilling rod unit be also can folding structure, thus, in the time need to increasing the number of drilling rod unit, as long as open drilling rod unit, after cable and water pipe are fixed, close up drilling rod unit, the drilling rod unit newly increasing and former drilling rod unit are fixed together, this method is simple in structure, connect reliably, and there is enough mechanical strengths.
(3) gravity pressure rim guide peg declines, and gravity platen passes to bit electrode by gravity load by drilling rod, makes bit electrode keep vertical direction and occurs to contact closely with rock, has greatly improved the energy utilization efficiency of rig.
(4) by adopting assembled pulse to form the high-voltage pulse power source of network as plasma panel borer system, can export high-low pressure assembled pulse to load, realize source impedance and match with the characteristic impedance of plasma drill bit, can significantly improve the energy utilization efficiency of rig, improve bit speed.
(5) by adopting the high-voltage low-wave impedance coaxial water cable of high-voltage low-wave impedance coaxial water cable as plasma panel borer system, can significantly reduce the wave impedance of transmission line, improve burst transmissions efficiency, cable and water inlet pipe are made an overall structure, have improved the flexibility of cable and have made the structure of rig more compact.
(6) borer system of the present invention has adopted circulating water device, has improved the utilization rate of deionized water.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of pulsed plasma rig fractured rock.
Fig. 2 is the formation schematic diagram of plasma borer system of the present invention.
Fig. 3 is the structural representation of a kind of embodiment of the high-field electrode of plasma borer system of the present invention.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the sectional view of the A-A direction of Fig. 4.
Fig. 6 is the perspective view of a kind of embodiment of the earthing electrode of plasma borer system of the present invention.
Fig. 7 is the top view of the earthing electrode shown in Fig. 6.
Fig. 8 is the sectional view of the A-A direction of Fig. 7.
Fig. 9 is the circuit theory diagrams of a kind of embodiment of the high-voltage pulse power source of plasma borer system of the present invention.
Figure 10 is the perspective view of the high-voltage low-wave impedance coaxial water cable center conductor lead-out terminal of plasma borer system of the present invention.
Figure 11 is the top view of Figure 10.
Figure 12 is the sectional view of the A-A direction of Figure 11.
Figure 13 is the perspective view of the outer contact lead-out terminal of the high-voltage low-wave impedance coaxial water cable of plasma borer system of the present invention.
Figure 14 is the top view of the outer contact lead-out terminal of high-voltage low-wave impedance coaxial water cable.
Figure 15 is the sectional view of the A-A direction of Figure 14.
Figure 16 is the structural representation that high-voltage low-wave impedance coaxial water cable is connected with bit electrode.
Figure 17 is the top view of Figure 16.
Figure 18 is that the sectional view of the A-A direction of Figure 17 rotates the view that 125o obtains in the counterclockwise direction.
Figure 19 is the structural representation of a kind of embodiment of the drilling rod unit of plasma borer system of the present invention.
Figure 20 is the schematic diagram under the open mode of drilling rod unit shown in Figure 19.
Figure 21 is the syndeton schematic diagram of drilling rod unit shown in two Figure 19.
Figure 22 is the view of the support ring of drilling rod unit shown in Figure 19 when closed.
Figure 23 is the view of the support ring of drilling rod unit shown in Figure 19 while opening.
Figure 24 is the syndeton schematic diagram of drilling rod, bit electrode and high-voltage low-wave impedance coaxial water cable.
Figure 25 is the structure chart of the gravity platen of plasma borer system of the present invention.
The specific embodiment
The principle of pulsed plasma fractured rock is described below in conjunction with Fig. 1.As shown in Figure 1, rock 1 is placed in deionized water 2, high-field electrode 3 and earthing electrode 4 is placed on to the surface of rock 1, and high-field electrode 3 and earthing electrode 4 are immersed in deionized water environment.When applying after high-voltage pulse between high-field electrode 3 and earthing electrode 4, between high-field electrode 3 and earthing electrode 4, discharge, cause the electrical breakdown of rock 1, and in rock 1, form plasma channel 5, in circuit, follow-up energy injection is in plasma channel 5, and causes that plasma channel 5 expands.Channel expansion can produce stress rupture to rock 1, and when exceeding after the stress intensity of rock 1, rock 1 occurs broken.
With reference to figure 2, borer system is mainly comprised of drilling well mechanism 9, high-voltage pulse power source 10, high-voltage low-wave impedance coaxial water cable 13, water circle device 7 and bit electrode 6.
The lower surface of high-field electrode 3 and earthing electrode 4 contacts with rock 1, and is immersed in deionized water 2.
The generating means that high-voltage pulse power source 10 is short pulse, preferred technical scheme is to adopt high pressure assembled pulse power supply.The concrete structure of high pressure assembled pulse power supply can be with further reference to Chinese patent (ZL 200920295616.0).Fig. 9 is the circuit theory diagrams of an embodiment of high-voltage pulse power source of the present invention.The high-voltage output end of elementary pulse power P respectively with diode D
1anode and diode D
2negative electrode be connected, the low-voltage output ground connection of level pulse power P and with the D of diode
2anode be connected, diode D
1negative electrode and elementary pulsed capacitance C
1high-pressure side electrical connection, elementary pulsed capacitance C
1low-pressure end and diode D
2anodic bonding.Elementary pulsed capacitance C
1high-pressure side respectively with switch S
1anode and diode D
3cathodic electricity connect, diode D
3anode be electrically connected with one end of inductance L, the other end of inductance L and switch S
1cathodic electricity connect.Switch S
1negative electrode be electrically connected with the high-pressure side of the former limit winding of transformer Tr, the low-pressure end of the former limit winding of transformer Tr and elementary pulsed capacitance C
1low-pressure end electrical connection.The high-voltage output end of the secondary winding of transformer Tr is electrically connected with the anode of diode D4, the low-voltage output of the secondary winding of transformer Tr and high-voltage charging capacitor C
2low-pressure end electrical connection.Diode D
4negative electrode and high-voltage charging capacitor C
2high-pressure side and the high-pressure side electrical connection of pulse forming network F, the low-pressure end of pulse forming network F and high-voltage charging capacitor C
2low-pressure end electrical connection.The high-pressure side of pulse forming network F and switch S
2anode electrical connection, switch S
2negative electrode and the High voltage output terminal V of high-voltage pulse power source
helectrical connection, the sub-V of low-voltage output of the combined high pressure pulse power
lthe low-voltage output that forms network F with assembled pulse is electrically connected.
The operating principle of circuit shown in Fig. 9 is: elementary charge power supply P is through diode D
1and D
2after rectification, give elementary pulsed capacitance C
1charging, as elementary pulsed capacitance C
1after having charged, switch S
1triggering and conducting, elementary pulsed capacitance C
1electric discharge, can be coupled out a high pressure at the secondary of transformer Tr, through diode D
4rectification after simultaneously give high-voltage charging capacitor C
2f charges simultaneously with pulse forming network.Diode D
3with inductance L be switch S
1protective device, this is because switch S
1general solid switch, the diode D of adopting
3be connected in parallel on solid switch S with inductance L
1two ends can make solid switch S
1the in the situation that of backward voltage, be not hit.When high-voltage charging capacitor C
2after charging process completes, switch S
2triggering and conducting, produces high-voltage pulse output.Switch S
2negative electrode and the High voltage output terminal V of high-voltage pulse power source
helectrical connection, the low-pressure end of pulse forming network F and the sub-V of the low-voltage output of high-voltage pulse power source
helectrical connection.When rock does not puncture, the characteristic impedance of plasma drill is very large, and power supply provides the little electric current of high voltage that rock is punctured; After rock punctures, the characteristic impedance of plasma drill bit is very little, and power supply provides low-voltage, high-current the plasma channel of rock to be heated and then realized the fragmentation of rock.This supply unit can be realized source impedance and match with the characteristic impedance of plasma drill bit, can significantly improve the energy utilization efficiency of rig, improves bit speed.As the preferred embodiment of the present invention, the crest voltage of high-voltage pulse power source output is 30～100kV, and the rising front of pulse is less than 100ns, and the width of pulse is less than 5 μ s, pulse frequency 10～300Hz, and single pulse energy is 10 ~ 300J.
High-voltage low-wave impedance coaxial water cable 13 is transmitting devices of pulse, and its concrete structure can be with further reference to Chinese patent (ZL 201120039880.5).As shown in figure 16, high-voltage low-wave impedance coaxial water cable 13 comprises water inlet pipe 14, center conductor 15, dielectric 16, outer contact 17 and the oversheath 18 of coaxial setting from inside to outside.Wherein, dielectric 16 is insulated hull, high pressure resistant insulation paper, rubber insulation tape and polyurethane inner sheath combined insulation medium.
The input of the center conductor 15 of high-voltage low-wave impedance coaxial water cable 13 is electrically connected with the High voltage output terminal 11 of high-voltage pulse power source 10; The input of the outer contact 17 of high-voltage low-wave impedance coaxial water cable 13 is electrically connected with the low-voltage output of high-voltage pulse power source 10 12.Referring to Figure 16,17 and Figure 18, the output of the center conductor 13 of high-voltage low-wave impedance coaxial water cable 13 is electrically connected with the high-field electrode 3 of bit electrode 6 by high-field electrode connector 47; The output of the outer contact 17 of high-voltage low-wave impedance coaxial water cable 13 is electrically connected with the earthing electrode 4 of bit electrode 6 by earthing electrode connector 48.The structure of high-field electrode connector 47 is as shown in Figure 10, Figure 11 and Figure 12.High-field electrode connector 47 is a hollow cylinder, and the inner side of cylinder is fixed and is electrically connected with the output of the center conductor 13 of high-voltage low-wave impedance coaxial water cable 13, and the outside of cylinder is fixed and is electrically connected with the high-field electrode 3 of bit electrode 6.Figure 13, Figure 14 and Figure 15 are the structural representation of earthing electrode connector 48.The structure of earthing electrode connector 48 is also hollow cylinder, and inner side is fixed and is electrically connected with the output of the outer contact 17 of high-voltage low-wave impedance coaxial water cable 13, and the outside of cylinder is fixed and is electrically connected with the earthing electrode 4 of bit electrode 6.There are two grooves in the outside of earthing electrode connector 48, match with two grooves of earthing electrode 4 inner sides, the conglobate through hole 44 of shape, for the 36(that fixes a drainpipe referring to Figure 16, Figure 17 and 18).
When plasma borer system of the present invention is normally worked, bit electrode 6 need be under deionized water environment, and fragmented rock chip will take bit electrode in time out of, and borer system need to be used deionized water circulating device 7.Water circle device 7 comprise can obtain deionized water water purification installation 38, reservoir 33, intake pump 35, go out water pump 37 and gutter 36, the water inlet of reservoir 33 is communicated with the delivery port of water purification installation 38, the delivery port of reservoir 33 is communicated with the water inlet of intake pump 35, the delivery port of intake pump 35 is communicated with the water inlet of the water inlet pipe of high-voltage low-wave impedance coaxial water cable 14, the water inlet that goes out water pump 37 is communicated with the delivery port of gutter 36, and the delivery port that goes out water pump 37 is communicated with the water inlet of water purification installation 38.
Drilling well mechanism 9 comprises that frame 24, drilling rod 20, gravity platen 19, guide peg 23, upper limit position switch 22, lower position switch 25, the first fixed pulley 26, the second fixed pulley 27, the 3rd fixed pulley 28 and winch 8, the first fixed pulleys 26, the second fixed pulley 27, the 3rd fixed pulley 28, guide peg 23, upper limit position switch 22 and lower position switch 25 are fixed in frame 24.
The bottom of drilling rod 20 is fixedly connected with (referring to Figure 24) with earthing electrode 4 tops of bit electrode 6.The support ring of drilling rod is provided with screwed hole 52(referring to Figure 22), the earthing electrode 4 of bit electrode 6 is provided with bolt hole 46(referring to Fig. 7), bolt 56 is fixedly connected with the earthing electrode 4 of drilling rod 20 and bit electrode 6 with bolt hole 46 by corresponding screwed hole 52.Gutter 36 via the second fixed pulley 27 after from top to bottom successively through the drain-pipe through-hole 53 arranging on each support ring 50 of gravity platen 19, drilling rod, and the output of gutter 36 is fixedly connected with earthing electrode 4, and the cavity 62 between high-field electrode 3 and earthing electrode 4 is communicated with gutter 36, the bottom of drilling rod 20 is fixedly connected with the upper end of earthing electrode 4.As the preferred embodiment of the present invention, on the lower surface of high-field electrode 3, there is minor groove (referring to Fig. 3), the water purification in water inlet pipe 14 can flow in the cavity 62 between high-field electrode 3 and earthing electrode 4 by minor groove.
One end of hawser 29 on winch 8 is fixedly connected with gravity platen 19 afterwards via the 3rd fixed pulley 28.
The course of work of plasma borer system of the present invention is: first start intake pump 35, deionized water clean in reservoir 33 is pumped in water inlet pipe 14, water inlet pipe 14 is delivered to bit electrode 6 by clean deionized water, makes the cavity between high-field electrode 3 and the earthing electrode 4 of bit electrode 6 be full of deionized water.Start subsequently and water pump 37, deionized water in rig is circulated.Start high-voltage pulse power source 10, output high-voltage pulse, is delivered to bit electrode 6 through high-voltage low-wave impedance coaxial water cable 13.The high-field electrode 3 of bit electrode 6 contacts with rock 1 with earthing electrode 4, and when high-voltage pulse arrives, electric discharge between high-field electrode 3 and earthing electrode 4, causes puncturing and producing rock chip of rock 1.Going out under the effect of water pump 37, rock chip enters gutter 36 and enters into purifier 38 with deionized water.After purifier 8 is processed, rock chip is rejected to rubble transport vehicle 40 through slag-drip opening 39, and clean deionized water flow into reservoir 33, enters circulation next time.Under repetition pulse effect, can realize the continuous crushing of rock, the horizontal plane that bit electrode 3 contacts with rock 1 also constantly declines, and bit electrode 3 is being drawn high-voltage low-wave impedance coaxial water cable 13 and is also constantly being declined, and forms the boring of rock.When gravity platen 19 runs to lower position switch 25 under self gravitation effect, high-voltage pulse power source 10 quits work.Cable car 8 power initiations, promote gravity platen 20 by hawser 29; When gravity platen 20 arrives at upper limit position switch 22, the stepper motor of cable car 8 stops the rotation, and vises hawser 29.In order to realize darker drilling well, a stepout well bar unit now need be installed on the basis of former drilling rod 20.Open the stepout well bar unit of cage type, fix after high-voltage low-wave impedance coaxial water cable 13 and gutter 36, close up new drilling rod unit, new, old drilling rod unit two adjacent support rings are bolted together.Then stop the power supply of cable car 8, hawser 29 is in free state, and gravity platen 19 falls on drilling rod 20.Start high-voltage pulse power source 10, enter drilling process next time.By repetitive frequency pulsed effect, can realize the rock drilling well of the degree of depth.
In order to overcome the out-of-flatness on ground to the impact of drilling well, can in the frame of wellbore structure, levelling gear be installed.As shown in Figure 2, levelling gear is load-bearing bolt, is arranged on the lower surface of drilling well frame, by adjusting, regulate the relative altitude of four feets, can allow rig keep level, avoided the impact of the state of ground on rig attitude,, be convenient to vertically drilling well of bit electrode 6.
Claims (4)
1. a drilling rod, it is characterized in that: comprise at least one drilling rod unit, each drilling rod unit comprises at least two opening-closing type support rings (50) and connecting rod (49), described support ring (50) is provided with cable through-hole (55), drain-pipe through-hole (53) and connecting rod through hole (51), by run through adjacent two support rings corresponding connecting rod through hole (51) described connecting rod (49) and two adjacent support rings are fixed together; Each drilling rod unit connects successively, and two adjacent support rings of adjacent two drilling rod unit are fixedly connected with.
2. a pulsed plasma borer system that contains the drilling rod of claim 1, is characterized in that: comprise drilling well mechanism (9), high-voltage pulse power source (10), high-voltage low-wave impedance coaxial water cable (13), water circle device (7) and the bit electrode (6) for discharging to rock;
Described bit electrode (6) comprises high-field electrode (3) and earthing electrode (4);
Described high-voltage low-wave impedance coaxial water cable (13) includes water inlet pipe (14), center conductor (15), dielectric (16), outer contact (17) and the sheath (18) of coaxial setting from inside to outside successively;
The High voltage output terminal (11) of described high-voltage pulse power source (10) is electrically connected with the input of the center conductor (15) of high-voltage low-wave impedance coaxial water cable (13), and low-voltage output (12) of high-voltage pulse power source (10) is electrically connected with the input of the outer contact (17) of high-voltage low-wave impedance coaxial water cable (13);
Described water circle device comprises the water purification installation (38) that can obtain deionized water, reservoir (33), intake pump (35), go out water pump (37) and gutter (36), the water inlet of reservoir (33) is communicated with the delivery port of water purification installation (38), the delivery port of reservoir (33) is communicated with the water inlet of intake pump (35), the delivery port of intake pump (35) is communicated with the water inlet of the water inlet pipe (14) of high-voltage low-wave impedance coaxial water cable (13), the water inlet that goes out water pump (37) is communicated with the delivery port of gutter (36), the delivery port that goes out water pump (37) is communicated with the water inlet of water purification installation (38),
Described drilling well mechanism (9) comprises frame (24), described drilling rod (20), gravity platen (19), at least two guide pegs (23), upper limit position switch (22), lower position switch (25), the first fixed pulley (26), the second fixed pulley (27), the 3rd fixed pulley (28) and winch (8), and the first fixed pulley (26), the second fixed pulley (27), the 3rd fixed pulley (28), guide peg (23), upper limit position switch (22) and lower position switch (25) are fixed in frame (24); Gravity platen (19) is provided with the through hole that high-voltage low-wave impedance coaxial water cable (13) and gutter (36) are passed through, gravity platen (19) is placed in the top of described drilling rod (20), one end of the hawser (29) of winch (8) is fixedly connected with gravity platen (19) via after the 3rd fixed pulley (28), and guide peg (23) can move back and forth up and down along guide peg (23) through gravity platen (19) and gravity platen (19) upper limit position switch (22) and lower position switch (25);
Described high-voltage low-wave impedance coaxial water cable (13) via the first fixed pulley (26) after from top to bottom successively through the upper set cable through-hole (55) of each support ring (50) of gravity platen (19), drilling rod (20), the output of the center conductor (15) of high-voltage low-wave impedance coaxial water cable (13) is electrically connected with high-field electrode (3), and the output of the outer contact (17) of high-voltage low-wave impedance coaxial water cable (13) is electrically connected with earthing electrode (4);
Described gutter (36) via the second fixed pulley (27) after from top to bottom successively through the upper drain-pipe through-hole (53) arranging of each support ring (50) of gravity platen (19), drilling rod, the water inlet end of gutter (36) is fixedly connected with earthing electrode (4), cavity (62) between high-field electrode (3) and earthing electrode (4) is communicated with the water inlet of gutter (36), and the bottom of drilling rod (20) is fixedly connected with the upper end of earthing electrode (4); Deionized water in described water inlet pipe (14) can flow in the cavity (62) between high-field electrode (3) and earthing electrode (4).
3. pulsed plasma borer system according to claim 2, is characterized in that: described deionization electrical conductivity of water is less than or equal to 100 μ S/cm.
4. pulsed plasma borer system according to claim 2, it is characterized in that: the crest voltage of described high-voltage pulse power source output is 30～100kV, and the rising front of pulse is less than 100ns, and the width of pulse is less than 5 μ s, pulse frequency 10～300Hz, single pulse energy is 10 ~ 300J.
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| CN201210184371.0A CN102678044B (en) | 2012-06-06 | 2012-06-06 | Well drilling rod and pulse plasma drilling machine system |
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| CN201210184371.0A CN102678044B (en) | 2012-06-06 | 2012-06-06 | Well drilling rod and pulse plasma drilling machine system |
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| CN109577859A (en) * | 2018-07-03 | 2019-04-05 | 西南石油大学 | A kind of continuous compound rock-breaking and well-drilling method of pipe high electric field pulse-machinery |
| CN109630020A (en) * | 2019-01-11 | 2019-04-16 | 中国石油大学(华东) | Multichannel high-low pressure composite plasma boring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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