CN102704918A - Connecting device for well bore signal transmission - Google Patents
Connecting device for well bore signal transmission Download PDFInfo
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- CN102704918A CN102704918A CN2012101312868A CN201210131286A CN102704918A CN 102704918 A CN102704918 A CN 102704918A CN 2012101312868 A CN2012101312868 A CN 2012101312868A CN 201210131286 A CN201210131286 A CN 201210131286A CN 102704918 A CN102704918 A CN 102704918A
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Abstract
The invention provides a connecting device for well bore signal transmission. The connecting device is capable of connecting cables together to establish a signal transmission channel between the ground and underground during oil well drilling or operation. The connecting device consists of a first connector and a second connector, a coil winding in each connector transmits signals from one coil to another coil according to the electromagnetic induction principle so as to achieve signal transmission, each coil winds and at least partly wraps a coupling element, the coupling elements form a closed magnetic circuit when the two connectors are connected together so that each electromagnetic coupled coil winding is surrounded, loss of signal power is reduced by means of reducing magnetic flux loss of each connector by the coupling elements, the connecting device and the cables extend in an axial hole of a drilling string, and the connectors are firm and can still work when clearance is reserved between the two coupling elements.
Description
Technical field
The present invention relates to be used for the linkage of pit shaft signal transmission, especially, the present invention relates to be used for setting up in the pit shaft and between the ground linkage of signal transmission passage.
Background technology
In drilling operation processes such as oil, mine, geological prospecting, need to obtain information such as a large amount of down-hole formation parameters and borehole status, the general using sensor obtains these information, and the real-time ground that is transferred to.Be accompanied by The Application of Technology such as drilling measuring technology (MWD), logging while drilling technology (LWD), seismic imaging technology and rotary steerable drilling technology, required information transmitted amount is increasing.
At present, the transmission means of data-signal mainly contains wireless transmission and two kinds of forms of wire transmission in the drilling process.Wireless signal transmission techniques mainly comprises: mud-pulse, sound wave and three kinds of forms of electromagnetic wave.Wherein the mud pulse technology commercial application is the most extensive, technological comparative maturity, but transfer rate is low; Information content is little; The impulse generator complex structure, influence factor is many, and is not suitable in the drilling fluid of gas or gas-liquid mixed phase; The requirement that bulk information transmits real-time can not be satisfied, the high-speed channel of ground and under-well bi-directional closed-loop information transmission can not be set up.Technology of acoustic wave is to utilize drill string to carry out the transmission of signal for passage, and this technical costs is low, and transfer rate is fast; But transmission range is too short, is not suitable for deep-well, and receives surrounding environment influence bigger; The instance that this is technological, the acoustics wellbore telemetry system described in PCT patent No.WO2004085796.The electromagnetic wave technology is to utilize drilling rod, the borehole wall and the space between them, and the transmission channel of stratum mutual group one-tenth is carried out the transmission of signal on every side.This technological system good stability has better compliance under balance pressure drilling, but receives the influence on stratum very big, and along with the increase of well depth, weak gradually, compliance is relatively poor, and cost is high.
Wire transmission technology be with cable independently as transmission channel, therefore do not receive the influence of drilling fluid types, stratum and well depth.Wherein have the transfer rate height as the signal transmission technology of transmission channel with whole cable or optical fiber, advantage such as influence factor is little, but be not suitable for rotary drilling, and complex operation, cost is high.
In drilling rod, lay the cable of segmentation, the segmentation cable is linked together, can realize the transmission of signal between ground and downhole instrument, can be called the segmented Cable Transmission Technology through linkage.This Technology Need connects the form of hundreds of root cable through joint, and a hundreds of joint is arranged on the whole transmission channel, therefore how to guarantee that the reliability of joint is the key of this technology.Connected mode according to linkage can be divided into " being flexible coupling " and " being connected firmly " two kinds, and " being flexible coupling " be meant through induction mode and realize connecting between cable, have simple in structure, the reliability advantages of higher." the hard connection " is exactly to reach the purpose that is communicated with between cable through the direct perhaps mediate contact that makes cable conductor together, is applied to the connection between downhole instrument at present more.In the accuracy that guarantees cable butting unusual difficulty on the insulating properties extremely, reliability is low.
The induction coupling technique that utilizes electric current to be coupled carries out " being flexible coupling " between cable thereby the research that reaches signal transmission in the well is had it long ago; Be entitled as the United States Patent(USP) No. 4602468 of " mutual inductance type cable connector ", introduced the application of the induction coupling that is fixed on the drilling rod inner surface.About intelligent drilling rod and electric current inductive coupling connector instance as: be entitled as " drilling rod group telemetry system " United States Patent(USP) No. 4126848, be entitled as the United States Patent(USP) No. 20080106433 of " pipeline and the method for transmission signal "; Be entitled as " being used to transmit pipeline and the method for signal " Chinese patent No.200610071982, be entitled as the Chinese patent No.200410087051 of " downhole telemetry system and method ".Mainly be to utilize electromagnetic induction principle to utilize coil and high permeability materials to realize the transmission of signal between cable, wherein high permeability material is mainly ferrite.Because coil, coupling element and various ways occurs separately with different structures of linkage that make such as the mode of action between drilling rod.
The intelligent drilling rod technology of comparative maturity is that cable burial is inner at drilling rod at present; Bury docking facilities underground in tool joint place; Utilize " being flexible coupling " perhaps connection of " the hard connection " realization adjacent drill pipes inner cable, between down-hole and ground, realize the high efficiency of transmission of signal or electric power.
Wherein, realize that between tool joint the intelligent drilling rod technology of cable " being flexible coupling " has been carried out commercial application, can reach the transfer rate of 2Mbit/s.This technology has realized the great raising of signal transmission rate aspect, but need in tool joint, lay coil realizes " being flexible coupling " between cable, and the processing and manufacturing process is complicated, the maintenance difficulty, and cost is high, and needs to use extraordinary drilling rod.
Summary of the invention
Proposed a kind of linkage that can be used for the borehole signal transmission, this linkage is realized the transmission of signal through the mode of electromagnetic induction.
Linkage comprises in one embodiment: first connector and second connector, and wherein first connector comprises first coil and first coupling element, first coil twines and at least partly encases first coupling element; Second connector comprises second coil and second coupling element, and second coil twines and at least partly encase second coupling element; Connect first connector and second connector, electromagnetic coupled first coil and second coil.
Linkage comprises in another embodiment: first connector, and said first connector comprises first magnetic conduction casing, and the first conducting magnetic column body is arranged in the cavity of first magnetic conduction casing, is fixed with first coil windings on the inwall of first magnetic conduction casing; Second connector, said second connector comprises second magnetic conduction casing, and the second conducting magnetic column body is arranged in the cavity of second magnetic conduction casing, second coil windings is along the circumferential direction twined the second conducting magnetic column body; Wherein, the material of each magnetic conduction casing and conducting magnetic column body is a soft magnetic materials, and the internal diameter of first coil windings is greater than the external diameter of said second coil windings; Connect said first connector and second connector; Said first magnetic conduction casing and said second magnetic conduction casing are combined together; The first conducting magnetic column body and the said second conducting magnetic column body are combined together; Wherein first coil windings is enclosed within on said second coil windings, electromagnetic coupled first coil and second coil.
Linkage comprises In yet another embodiment: first connector, said first connector comprise first conductive shell and are fixedly mounted on first coil in the first conductive shell cavity; Second connector, said second connector comprise second conductive shell and are fixedly mounted on second coil in the second conductive shell cavity; Wherein each coil have along housing shaft to the cross section; Connect said first connector and second connector, first conductive shell and second conductive shell are combined together, encase first coil and second coil, electromagnetic coupled first coil and second coil.
The present invention utilizes electromagnetic induction principle, under the situation that does not need electric conductor directly to contact, realizes the transmission of the signal between two cables, and device reliability is high, easy operating, and easy access more adapts to abominable subsurface environment.
Description of drawings
Fig. 1 is the partial schematic diagram with borehole signal transmission system of linkage.
Fig. 2 is the left view of first preferred embodiment of linkage of the present invention.
Fig. 3 is the full sectional view of linkage shown in Figure 2.
Fig. 4 is the partial sectional view of the inductive coupling apparatus of first preferred embodiment.
Fig. 5 A is the fundamental diagram of the linkage of first preferred embodiment.
Fig. 5 B is the electromagnetic induction coupling figure of the linkage of first preferred embodiment.
Fig. 6 A is the linkage half sectional view of second embodiment.
Fig. 6 B is a coupling device front view among second embodiment.
Fig. 6 C is the coupling device left view shown in Fig. 6 B.
Fig. 7 A is the front view of first coupling element of the linkage of the 3rd embodiment.
Fig. 7 B is the full sectional view of the linkage of the 3rd embodiment.
Fig. 8 is the full sectional view of the linkage of the 4th embodiment.
Fig. 9 is half cut-away view of first connector of linkage shown in Figure 8.
Figure 10 is the schematic diagram of the linkage of the 4th embodiment.
Figure 11 is the front view of the linkage of the 5th embodiment.
Figure 12 is the sectional view of A-A line among Figure 11.
Figure 13 is the sectional view of the linkage of first kind of variation of the 5th embodiment.
Figure 14 is the sectional view of first connector of the linkage of the 6th embodiment.
Figure 15 is the sectional view of second connector of the linkage of the 6th embodiment.
Figure 16 is the half sectional view of the linkage of the 6th embodiment.
Figure 17 is the full sectional view of the linkage of the 7th embodiment.
Figure 18 is the full sectional view of first connector of linkage shown in Figure 17.
Figure 19 is the sectional view of B-B line among Figure 18.
The specific embodiment
It is a kind of reliable, firm, easy operating that the present invention provides, and is used for the linkage of borehole signal transmission system, can be used as the linkage between the cut cable that transmits signal in oil gas well drilling and the recovery process in the well.
Preferred embodiment comprises two electromagnetic induction connectors that link together, and each connector all comprises coil windings, when two connectors link together, through electromagnetic induction principle signal is delivered to another coil from a coil.In order to raise the efficiency, reduce induction loss, each connector also comprises the coupling element that permeability magnetic material is made.Among the embodiment shown in Figure 3, connector comprises induction coil and coupling element.Among the embodiment shown in Figure 8, the conductive layer that connector comprises induction coil and encases induction coil.
To combine accompanying drawing that specific embodiment of the present invention is carried out detailed description below, and, in these accompanying drawings, use similar drawing reference numeral to represent similar elements in order to realize uniformity.In the literary composition a large amount of details is set forth, more fully understood of the present invention so that provide, still, the present invention does not receive the qualification of these concrete details.
First preferred embodiment
What first embodiment of linkage was concrete is shown among Fig. 1-Fig. 4, schematically is shown in Fig. 5 A, Fig. 5 B.
Fig. 1 is the partial schematic diagram with borehole signal transmission system of linkage.In the axial hole of drill pipe section 111,112 etc., be lowered to cut cable 11,21 of segmentation etc.; The end of cable is connected with corresponding connector respectively; Connect connector 20 and connector 10 ' respectively like cable 21 two ends; When the jointed rod section increased drill string, the connector 20 of the connector of cable 11 1 ends 10 and the cable 21 corresponding end synthetic linkage that matches linked together cable; Set up the signal transmission between downhole instrument and the ground installation, can realize the transmitted in both directions of signal between ground and downhole instrument.Wherein the connector 20 at cable 21 and two ends and 10 ' constitutes a signal transmission unit A.
Fig. 2 is the left view of linkage; Fig. 3 is the full sectional view of linkage; Fig. 2 and Fig. 3 have shown that the borehole signal transmitting device is made up of first connector 10 and second connector 20, and first connector 10 mainly is made up of first shell 12 and first induction coupling 15, and first shell 12 has cylindrical cavity; Its cylindrical recessed surfaces 12a place has insulating protective layer 17, the first induction couplings 15 and is arranged in layer 17 formed cylindrical cavity.
Fig. 4 is the inductive coupling apparatus part sectioned view; Like Fig. 2 and shown in Figure 4, first induction coupling 15 comprises that first coupling element 13 and first coil, 14, the first coupling elements 13 have the first cylindrical housings 13a and the first cylindrical body 13b; The two forms annular recess; First coil 14 along the circumferential direction twines and at least partly encases the first cylindrical body 13b, and is fixed in the groove through packing material 16, and the openend of groove has high-strength abrasion-proof insulation protection material 18.
Be depicted as fundamental diagram of the present invention like Fig. 5 A, operating principle of the present invention is similar to transformer, and two toroidal winding 14c axially align parallel placement with 24c; According to electromagnetic induction principle; Feed the electric current that changes among the circuit 14b, the magnetic field that coil 14c will change, the direction in magnetic field is perpendicular to electric field; The electric current that places the coil 24c in the magnetic field of variation to change, the sense of current is perpendicular to magnetic direction.Coil 14c and coil 24c form simple coupling device.In order to improve the magnetic flux density of coil magnetic circuit, reduce the wastage, increase electromagnetic intensity; Raise the efficiency, in coupling device, increased magnetic core 14e, coil 14c and coil 24c are axially aligned be wrapped on the magnetic core; Magnetic core can be for the permeability magnetic material of simple shape, like cylindricality.Raise the efficiency in order to reduce leakage inductance, ideal situation is selected closed magnetic core down, perhaps reduces the gap as far as possible, the magnetic line of force is constrained in the magnetic core, shown in Fig. 5 B.
Be depicted as the electromagnetic induction coupling figure of linkage like Fig. 5 B; First coupling element 13 and second coupling element 23 are combined together the magnetic circuit Q that has formed sealing; The magnetic line of force is constrained in the magnetic circuit; The main magnetic core along closure of coil is responded to the electric current in another coil, and coupling element has reduced energy loss through the magnetic resistance that reduces magnetic circuit Q, has improved efficient.Although desirable magnetic circuit Q is the path of sealing, the path complete closed also is unnecessary.The reason that cooperates owing to the wearing and tearing between magnetic core and processing can produce some gaps, and the appearance in these gaps can not bring very big power loss, and influence can be very not big yet.
Coupling element is selected high-permeability material; Therefore the high more magnetic property of material magnetic conductivity is good more, and magnetic flux density is big more, selects magnetic conductivity than steel highland material more; But its magnetic hystersis loss of material that magnetic flux density is high is also high; In order to reduce eddy-current loss, need to select the high material of resistivity in addition, therefore need carry out the preferred of material according to running parameter.Can select the soft magnetic materials used always, like silicon steel thin slice, permalloy, ferro-cobalt, amorphous metal alloy, ferrite, iron powder etc.Coupling element comprises housing and cylindrical body in the present embodiment, the soft magnetic materials that preferred magnetic conductivity is high, resistivity is high.The cross section of cylindrical body can be the figure that other closed curve such as circle, rectangle, hexagon constitutes.Cylindrical body and cylindrical housings are one, also can be the two parts that contact.The cross section of cylindrical body is circular in first preferred embodiment, and cylindrical body and cylindrical housings are structure as a whole.Coupling element can utilize Magnaglo to process through moulding, high temperature sintering.
Coil preferably centers on cylindrical body and twines thick and fast equably, makes interval minimum between each circle, can use round line or lenticular wire, and place protective material with protected from environmental influences winding.The conductive material of coil is preferably selected copper, utilizes lacquer, pottery or polymer to carry out insulation processing then, and insulation materials is preferably selected for use has good toughness and flexible polymeric material, like high density polyethylene (HDPE) or polytetrafluoroethyl-ne alkane.Can comprise first coil and tertiary coil like first connector through increasing the stability that redundant coil windings improves system in addition, each coil is connected to different conductor or the different cables in same cable or the same cable; Second connector comprises second coil and the 4th coil, and each coil is connected to different conductor or the different cables in same cable or the same cable; Such coil windings or the lead that is connected with coil go wrong, and system still can work normally.
Cable requires to have certain intensity and toughness, is receiving the lead that can effectively protect inside under certain tension, and is requiring to have certain abrasion resistance, can select armored cable, and cable extends in the axial hole of drilling well tubing string.
In first preferred embodiment shown in Figure 3; The cylindrical housings 23a of the cylindrical housings 13a of first coupling element 13 and second coupling element 23 has identical cylindrical cavity body structure; Thereby be combined into a coupling device that surrounds coil fully, the different coupling component structure can design the coupling device of multiple different structure.The coupling element structure can be selected the structure of the magnetic core of high frequency transformer commonly used now; As through changing E type that shape changes the magnetic core performance, ER type, EFD type, ETD type, EER type, EC type, PQ type, EP type, jar type etc., and ring-shaped magnetic cores such as U type, C type.
Second embodiment
Fig. 6 A-6C has shown second preferred embodiment.Wherein Fig. 6 A is the linkage half sectional view, and Fig. 6 B is the coupling device sketch map, and Fig. 6 C is the coupling device left view.In the preferred embodiment, coupling element is the E type.First coupling element 33 is the E type; The cylindrical body that is rectangle by four cross sections constitutes; Being respectively the first cylindrical body 33a, the second cylindrical body 33b, the 3rd cylindrical body 33c and the 4th cylindrical body 33d constitutes; The first cylindrical body 33a, the second cylindrical body 33b and the 3rd cylindrical body 33c respectively equidistant placement on the 4th cylindrical body 33d and and the 4th cylindrical body combine; Twining first coil 34 on the second cylindrical body 33b and forming first induction coupling, the structure of the structure of second induction coupling and first induction coupling is similar.Two induction couplings are fixed in the groove of first shell 32 and second shell 42 through insulation filling material 37,38 and 47,48 respectively, form first connector 30 and second connector 40.Two connectors lock together the formation linkage through locking element 39, and first coupling element 33 and second coupling element 43 are combined together, and form closed magnetic line of force path, shown in Fig. 6 B.The structure of this coupling element makes can only partly surround two coil windings when two coupling elements are combined together.
The 3rd embodiment
Fig. 7 A, 7B have shown the 3rd preferred embodiment, and wherein, Fig. 7 A is the first coupling element front view, and Fig. 7 B is the full sectional view of linkage.Show like Fig. 7 A; First coupling element 53 comprises the first cylindrical housings 53a and the first tubular cylindrical body 53b; The first housing 53a goes up symmetry and has two first gap 53c, and the structure that has first through hole, 58, the second coupling elements 63 on the first tubular cylindrical body 53b is identical with first coupling element 53.Shown in Fig. 7 B, first coil 54 along the circumferential direction twines the first tubular cylindrical body 53b, and is fixed in the annular groove of first coupling element 53 through insulation filling material 56, constitutes first induction coupling.The structure of second induction coupling is similar with first induction coupling.First induction coupling is fixed on through packing material 57 and forms first connector 50 in the inner chamber of first shell 52; Second induction coupling is fixed on through packing material 67 and forms second connector 60 in the inner chamber of second shell 62; First connector 50 and second connector 60 lock together through locking element 59, and the cylindrical body of two coupling elements and housing are combined together respectively, surround two coil windings; Form closed magnetic line of force path, first, second coil windings is coupled.
The 4th embodiment
The 4th embodiment that is used for the linkage of borehole signal transmission system shows at Fig. 8, Fig. 9, Figure 10.
Be illustrated in figure 8 as the full sectional view of linkage of the present invention, Fig. 9 is half cut-away view of first connector 210 of linkage, and Figure 10 is a schematic diagram.In this embodiment, have first cylindrical body 214 in first shell 212, thereby form cannelure, on the inwall of cannelure, be fixed with first conductive layer 213.First coil 216 twines and at least partly encases first coupling element 217 vertically, and wherein first coupling element 217 is fixed in the cannelure through packing material 215 for tubular body also is enclosed within on first cylindrical body 214 vertically.
Wherein, first, second coil have along enclosure axis to the cross section.Magnetic material as coupling element can make hysteresis loss and eddy current loss reduce.The material of conductive layer is that resistivity is less, the low material of magnetic conductivity, can select the alloy of steel, copper alloy, silver, aluminium, gold, tungsten and zinc and these metals etc.
In addition, first shell also can be selected the material the same with conductive layer with second shell, thereby conductive layer and housing are become one, and through type of attachment such as processing bolt hole or screw thread on conductive layer, two connectors is linked together then.
The 5th embodiment
The 5th embodiment of linkage that is used for the borehole signal transmission system is like Figure 11, shown in 12.
Figure 11 is the front view of linkage, and Figure 12 is the A-A direction sectional view of linkage.Can find out that through Figure 11, Figure 12 the two ends of linkage are cone, the centre is a cuboid.First shell 412 comprises cone and the rectangular housing that has through hole; Cable 411 links to each other with first coil 414 through the through hole of shell 412; First coil, 414 uniform winding are on semi-circular coupling element 415; Constitute first coupler, 419, the first couplers 419 and be fixed in the rectangle cavity of first shell 412, thereby constitute first connector 410 through packing material 413,416 and 417.
Respectively there is a bolt hole that cooperatively interacts at four angles of first shell 412 and second shell 512; Two housings locks together through bolt 418; First coupler 410 and second coupler 510 are formed coupling device, and be shown in figure 11, and first coupling element 415 and second coupling element 515 combine and form the annular solid of complete closure; Form the magnetic line of force path of sealing, the magnetic line of force is constrained in annular solid inside.
First kind of variation of the 5th embodiment
Figure 13 is the sectional view of first kind of variation of the 5th embodiment; In this changes; The coupling element 415,515 of two couplers all becomes U-shaped, and the coil uniform winding also encases the part of coupling element at least, and two coupling elements are combined together to form the magnetic line of force path of sealing; The insulation materials 513,516 and 517 that insulation materials 413,416 that other first connector is filled and 417, the second connectors are filled is different from the position and the structure of identical components among the 5th embodiment.
The 6th embodiment
A kind of the 6th preferred embodiment of the linkage that is used for the borehole signal transmission system is shown in Figure 14-16, and wherein Figure 14 is the first connector sectional view, and Figure 15 is the second connector sectional view, and Figure 16 is the half sectional view of linkage.Two connectors are cone and cylindrical combined shaped.
Among Figure 14, the duct that first cable 611 passes first shell 612 links to each other with first coil windings 616, and first coil windings 616 is uniform winding first annular insulating material 618 along the circumferential direction, and the internal diameter of insulation materials 618 is more than or equal to the external diameter of insulation materials 718.And be fixed on the inner surface of the cavity of first coupling element 614 through the first annular insulating layer 615, wherein the axial length of coil windings is smaller or equal to the axial length of cavity.First coil windings 616 and first coupling element, 614 common first induction couplings 610 of forming; First coupling element 614 comprises the first cylindrical magnetic conduction casing 624 and the first conducting magnetic column body 634, and wherein the first conducting magnetic column body 634 is positioned at the circle centre position of the disk-shaped bottom of the first cylindrical magnetic conduction casing 624.First coupling element 614 is fixed in the cylinder shape groove of first shell 612 through insulation filling material 613, forms first connector.
In Figure 15; The duct that second cable 711 passes second shell 712 is connected with second coil 716; Second coil is uniform winding second cylindrical body 734 along the circumferential direction; Annular insulating material 718 through surface coverage is fixed in the groove of coupling element, constitutes second induction coupling 710 with second coupling element 714, and wherein the axial length of second coil windings is smaller or equal to the length of second cylindrical body.Second coupling element 714 comprises that upwardly extending second cylindrical housings 724 of axle and second cylindrical body, 734, the second coupling elements 714 are fixed in the groove of second shell 712, and fill insulant 713 between the two, form second connector.
Among Figure 16, be the half sectional view of linkage.First connector and second connector lock together through circular casing 719; First induction coupling 610 and second induction coupling 710 are axially aligned; First magnetic conduction casing 624 and second magnetic conduction casing 724 combine, and first coil windings 616 is enclosed within on second coil windings 716, and the first conducting magnetic column body 634 and the second conducting magnetic column body 734 combine; Encase two coil windings, form the magnetic line of force path of sealing.Preferably; First coil windings 616 preferably equates with the axial length of second coil windings 716; And length d 2 sums that guarantee length d 1 and second magnetic conduction casing 724 of first magnetic conduction casing 624 equal length d 4 sums of the first conducting magnetic column body, 634 length d 3 and the second conducting magnetic column body 734 basically; That is: d1+d2=d3+d4, wherein: d2 >=D2; D3 >=D1, D1 are the thickness of the first coupling element bottom disc; D2 is the thickness of the second coupling element bottom disc.Thereby when two connectors were linked together, the gap between two coupling elements reduced as far as possible, and two cylindrical body and two housings contact respectively, reduce the air gap on the magnetic line of force path as far as possible, formed closed path.
Preferably, work as d2=D2, during d3=D1; First coupling element 614 becomes columniform shell structure; Second coupling element is the combination of cylinder and discoid body, and when connector linked together, first housing contacted with the bottom disc of second coupling element; Second cylindrical body contacts with the bottom disc of first coupling element, forms closed magnetic conducting path.
The 7th embodiment
The 7th preferred embodiment of linkage is shown in Figure 17-19, and wherein Figure 17 is the full sectional view of linkage, and Figure 18 is the full sectional view of first connector, and Figure 19 is the B-B direction sectional view of first connector, and wherein coupling element is the halfpipe body.First coil 816 twines and at least partly encases first coupling element 818 vertically and forms first coupler; Fill insulation protection material 820 in the duct, inner arc place of first coupler; There is insulation protection material 815 at the outer arc place; And be covered with topping 814, the first couplers and be fixed on through packing material and topping in the groove of first shell 812, form hemicycle cylindrical groove 819.Second coupler and first coupler structure are similar, and are fixed in second shell 912 through topping and packing material.Utilize bolt two connectors to be combined together the formation linkage through the bolt hole 817 on first shell and second shell and 917.The protruding end of first coupling element 818 gets in the groove 919 of second connector 910; The protruding end 918 of second coupling element gets in the groove 819 of first connector 810; Two square-sections of first coupling element 818 are combined together with two square-sections of second coupling element 918 respectively; Form the closed magnetic line of force path of tubulose, first, second coil windings is coupled.
Claims (10)
1. a linkage that is used for the borehole signal transmission is characterized in that, comprising:
First connector, said first connector comprises first coil, said first coil twines and at least partly encases first coupling element;
Second connector, said second connector comprises second coil, said second coil twines and at least partly encases second coupling element;
Connect said first connector and second connector, said first coil of electromagnetic coupled and second coil.
2. linkage as claimed in claim 1; It is characterized in that; Also comprise cut cable, said cut cable extends in the axial hole of drilling well tubing string, and an end of said cut cable is electrically connected said first coil in said first connector; The other end of said cut cable is electrically connected said second coil of said second connector, connects said first connector and second connector of the abutting end of adjacent cable section.
3. linkage as claimed in claim 1 is characterized in that, said first connector comprises first shell, and said first shell part at least surrounds said first coil; Said second connector comprises second shell, and said second shell part at least surrounds said second coil; Connect said first shell and second shell.
4. linkage as claimed in claim 1 is characterized in that, said first coupling element comprises first cylindrical body, and said second coupling element comprises second cylindrical body; Said first coil along the circumferential direction twines and at least partly encases said first cylindrical body, and said second coil along the circumferential direction twines and at least partly encases said second cylindrical body, and said first cylindrical body and said second cylindrical body are combined together.
5. linkage as claimed in claim 4 is characterized in that, said first coupling element also comprises first housing, and said first housing contacts with said first cylindrical body or is one; Said second coupling element also comprises second housing, and said second housing contacts with said second cylindrical body or is one; Said first housing and said second shell form the magnetic circuit that surrounds two coils together.
6. linkage as claimed in claim 1; It is characterized in that; Said first coupling element and second coupling element are semi-circular, U type or halfpipe body; Said first coil twines said first coupling element vertically, and said second coil twines second coupling element vertically, and said first coupling element and said second male part are combined together.
7. like each described linkage of claim 1 to 6, it is characterized in that the material of said coupling element is a soft magnetic materials.
8. a linkage that is used for the borehole signal transmission is characterized in that, comprising:
First connector, said first connector comprises first magnetic conduction casing, and the first conducting magnetic column body is arranged in the cavity of said first magnetic conduction casing, is fixed with the first conductive coil winding on the inwall of said first magnetic conduction casing;
Second connector, said second connector comprises second magnetic conduction casing, and the second conducting magnetic column body is arranged in the cavity of said second magnetic conduction casing, the second conductive coil winding along the circumferential direction twines the said second conducting magnetic column body;
The material of said each magnetic conduction casing and cylindrical body is a soft magnetic materials;
The internal diameter of the said first conductive coil winding is greater than the external diameter of the said second conductive coil winding;
Connect said first connector and second connector; Said first magnetic conduction casing and said second magnetic conduction casing are combined together; Said first conducting magnetic column body and the said second conducting magnetic column body are combined together; Said first coil windings is enclosed within on said second coil windings, said first coil of electromagnetic coupled and second coil.
9. a linkage that is used for the borehole signal transmission is characterized in that, comprising:
First connector, said first connector comprise first conductive shell and are fixedly mounted on first coil in the said first conductive shell cavity;
Second connector, said second connector comprise second conductive shell and are fixedly mounted on second coil in the said second conductive shell cavity;
Said first coil and second coil have along the axial cross section of said conductive shell;
Connect said first connector and second connector, first conductive shell and second conductive shell are combined together, encase said first coil and second coil, said first coil and second coil are coupled.
10. device as claimed in claim 9 is characterized in that, said conductive shell material comprises from the material that gold, silver, copper, aluminium, tungsten, zinc, copper beryllium alloy are formed to be chosen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101312868A CN102704918A (en) | 2012-05-02 | 2012-05-02 | Connecting device for well bore signal transmission |
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| CN2012101312868A CN102704918A (en) | 2012-05-02 | 2012-05-02 | Connecting device for well bore signal transmission |
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| CN104733863A (en) * | 2015-02-09 | 2015-06-24 | 中国石油天然气集团公司 | Cross-well electromagnetism logging instrument emitter and emitting antenna thereof |
| CN108843242A (en) * | 2018-07-09 | 2018-11-20 | 西安石大斯泰瑞油田技术有限公司 | A kind of rotary steerable drilling system of low cost high build angle rate and high rate of penetration |
| CN113266342A (en) * | 2021-06-22 | 2021-08-17 | 华中科技大学 | Signal wireless transmitting device |
| CN117145461A (en) * | 2023-07-10 | 2023-12-01 | 中国地质大学（武汉） | Wire-while-drilling communication connector, water braid and relay device and communication method |
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| CN104733863A (en) * | 2015-02-09 | 2015-06-24 | 中国石油天然气集团公司 | Cross-well electromagnetism logging instrument emitter and emitting antenna thereof |
| CN104733863B (en) * | 2015-02-09 | 2017-12-05 | 中国石油天然气集团公司 | Electromagnetic tool transmitter and its transmitting antenna between a kind of well |
| CN108843242A (en) * | 2018-07-09 | 2018-11-20 | 西安石大斯泰瑞油田技术有限公司 | A kind of rotary steerable drilling system of low cost high build angle rate and high rate of penetration |
| CN113266342A (en) * | 2021-06-22 | 2021-08-17 | 华中科技大学 | Signal wireless transmitting device |
| CN113266342B (en) * | 2021-06-22 | 2022-05-17 | 华中科技大学 | Signal wireless transmitting device |
| CN117145461A (en) * | 2023-07-10 | 2023-12-01 | 中国地质大学（武汉） | Wire-while-drilling communication connector, water braid and relay device and communication method |
| CN117145461B (en) * | 2023-07-10 | 2024-03-29 | 中国地质大学（武汉） | Wire-while-drilling communication connector, water braid and relay device and communication method |
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Application publication date: 20121003 |