A non-contact transfer system with an energy and signal sharing magnetic circuit

Abstract

The present invention provides a non-contact transfer system with an energy and signal sharing magnetic circuit, comprising: a first and a second magnetic conductive ring; the first magnetic conductive ring includes: a first magnetic ring, a first inwardly protruding ring, a second inwardly protruding ring, and a third inwardly protruding ring disposed inside the first magnetic ring. The first and the second inwardly protruding rings form a first groove, and the second and the third inwardly protruding rings form a second groove; the second magnetic conductive ring includes: a second magnetic ring, a first outwardly protruding ring, a second outwardly protruding ring, and a third outwardly protruding ring disposed outside the second magnetic ring and corresponding to the protruding rings in the first magnetic conductive ring. The first and the second outwardly protruding rings form a third groove, and the second and the third outwardly protruding rings form a fourth groove; the first and the third grooves are respectively used for accommodating signal transfer coils; the second and the fourth grooves are respectively used for accommodating energy receiving or energy transmitting coils. The present invention can achieve effective isolation of energy and signals to ensure effective transfer of energy and signals between the power supply part and the power consumption part.

Description

Technical Field

[0001] The present invention relates to the field of couplers, and particularly to a non-contact transfer system with an energy and signal shared magnetic circuit. Background Art

[0002] Couplers are widely used in the oil field, especially for non-contact energy transfer in scenarios such as static bias rotary steering and oil drilling instruments.

[0003] The couplers of existing technical solutions usually achieve isolated transfer of energy and signals through isolators. For example, Figure 1 As shown, although the existing couplers can achieve isolation between electrical energy transfer and signal transfer to a certain extent, since the magnetic field directions of the signal coil 110 and the energy coil 120 are opposite at the positions close to each other, interference still occurs at the positions where the magnetic fields of the signal coil 110 and the energy coil 120 are close to each other. In addition, if better mutual interference between energy and signals is to be achieved, the size of the isolator needs to be increased, which will increase the size of the coupler and make it inapplicable to the narrow space underground. Summary of the Invention

[0004] To solve the defects of poor isolation effect of the isolator in the prior art and its inapplicability to narrow spaces due to its large size, the present invention provides a non-contact transfer system with an energy and signal shared magnetic circuit, including: a first magnetic conductive ring and a second magnetic conductive ring nested with each other;

[0005] Wherein, the first magnetic conductive ring includes: a first magnetic ring, a first inward protruding ring, a second inward protruding ring, and a third inward protruding ring arranged inside the first magnetic ring. A first groove is formed between the first inward protruding ring and the second inward protruding ring, and a second groove is formed between the second inward protruding ring and the third inward protruding ring;

[0006] The second magnetic conductive ring includes: a second magnetic ring, a first outward protruding ring, a second outward protruding ring, and a third outward protruding ring arranged outside the second magnetic ring and corresponding to the protruding rings in the first magnetic conductive ring. A third groove is formed between the first outward protruding ring and the second outward protruding ring, and a fourth groove is formed between the second outward protruding ring and the third outward protruding ring;

[0007] The first groove and the third groove are respectively used for accommodating signal transfer coils;

[0008] The second groove and the fourth groove are respectively used for accommodating energy receiving or energy emitting coils;

[0009] The following relationships are satisfied among the first inwardly protruding ring and the first outwardly protruding ring, the second inwardly protruding ring and the second outwardly protruding ring, and the third inwardly protruding ring and the third outwardly protruding ring:

[0010] a ≤ c, b ≤ c, a + b ≥ c;

[0011] Wherein, a is the height of the first inwardly protruding ring or the first outwardly protruding ring, b is the height of the second inwardly protruding ring or the second outwardly protruding ring, and c is the height of the third inwardly protruding ring or the third outwardly protruding ring.

[0012] In a further embodiment, the non-contact transfer system with a shared magnetic circuit further includes: at least one set of energy transmitting coil and energy receiving coil and at least one set of signal transfer coils;

[0013] Each set of signal transfer coils includes a first signal transfer coil and a second signal transfer coil;

[0014] The first signal transfer coil and the energy transmitting coil are respectively arranged in the grooves of the first magnetic conductive ring, and the first magnetic conductive ring is connected to the power supply part of the drilling instrument. The second signal transfer coil and the energy receiving coil are respectively arranged in the grooves of the second magnetic conductive ring, and the second magnetic conductive ring is connected to the power consumption part of the drilling instrument; or

[0015] The first signal transfer coil and the energy transmitting coil are respectively arranged in the grooves of the second magnetic conductive ring, and the second magnetic conductive ring is connected to the power supply part of the drilling instrument. The second signal transfer coil and the energy receiving coil are respectively arranged in the grooves of the first magnetic conductive ring, and the first magnetic conductive ring is connected to the power consumption part of the drilling instrument.

[0016] In a further embodiment, the non-contact transfer system with a shared magnetic circuit further includes: an energy transmitting circuit, an energy receiving circuit and at least two sets of communication circuits;

[0017] The energy transmitting circuit is connected to the energy transmitting coil, and is used to obtain electric energy from the power supply part of the drilling instrument and provide high-frequency alternating current for the energy transmitting coil;

[0018] The energy receiving circuit is connected to the energy receiving coil, and is used to perform transformation processing on the energy received by the energy receiving coil and transmit the transformed energy to the power consumption part of the drilling instrument;

[0019] The communication circuit is connected to the first signal transfer coil and the second signal transfer coil, and is used to transmit and receive signals.

[0020] In a further embodiment, the energy receiving circuit includes: a rectifying and filtering circuit, which is used to perform rectifying and filtering processing on the energy received by the energy receiving coil.

[0021] In a further embodiment, the energy receiving circuit further includes: a high-frequency blocking circuit connected between the rectifying and filtering circuit and the energy receiving coil, and a center frequency of the high-frequency blocking circuit is a carrier frequency of the communication circuit.

[0022] In a further embodiment, the energy transmitting circuit includes at least one set of an inverter device and a resonant capacitor;

[0023] The inverter device is connected to the energy transmitting coil, configured to obtain electric energy from a power supply unit of the drilling instrument, convert the obtained electric energy into alternating current, and provide high-frequency alternating current for the energy transmitting coil;

[0024] The resonant capacitor is connected in series to a loop of the energy transmitting circuit.

[0025] In a further embodiment, the energy transmitting circuit further includes: a high-frequency blocking circuit connected between the inverter device and the energy transmitting coil, and a center frequency of the high-frequency blocking circuit is a carrier frequency of the communication circuit.

[0026] In a further embodiment, the carrier frequency of the communication circuit is 15 - 40 times of a center frequency of the energy transmitting circuit.

[0027] In a further embodiment, a depth of a groove where the signal transmission coil is located is between 20% - 80% of a depth of a groove where the energy transmitting and receiving coil is located.

[0028] In a further embodiment, a convex surface of the first inward protruding ring, a convex surface of the second inward protruding ring, and a convex surface of the third inward protruding ring are flush with each other;

[0029] A convex surface of the first outward protruding ring, a convex surface of the second outward protruding ring, and a convex surface of the third outward protruding ring are flush with each other.

[0030] In a further embodiment, the first magnetic conducting ring and the second magnetic conducting ring are formed by pressing and fitting a plurality of transverse magnetic body rings, or are formed by axially fitting a plurality of longitudinal magnetic body blocks along the coil.

[0031] In a further embodiment, the first magnetic conducting ring and the second magnetic conducting ring are arranged in a housing made of titanium alloy.

[0032] In a further embodiment, when the non-contact transmission system is in use, a shock-absorbing material is arranged on an outer side of the housing.

[0033] In a further embodiment, the first magnetic conducting ring and the second magnetic conducting ring are made of ferrite material.

[0034] The non-contact transfer system with energy and signal sharing magnetic circuit provided by the present invention is configured with a first magnetic conductive ring and a second magnetic conductive ring that are nested with each other. Among them, the first magnetic conductive ring includes: a first magnetic ring, a first inward protruding ring, a second inward protruding ring, and a third inward protruding ring arranged inside the first magnetic ring. A first groove is formed between the first inward protruding ring and the second inward protruding ring, and a second groove is formed between the second inward protruding ring and the third inward protruding ring. The second magnetic conductive ring includes: a second magnetic ring, a first outward protruding ring, a second outward protruding ring, and a third outward protruding ring arranged outside the second magnetic ring and corresponding to the protruding rings in the first magnetic conductive ring. A third groove is formed between the first outward protruding ring and the second outward protruding ring, and a fourth groove is formed between the second outward protruding ring and the third outward protruding ring. The first groove and the third groove are respectively used to accommodate signal transfer coils; the second groove and the fourth groove are respectively used to accommodate energy transceiver coils, so that the magnetic circuits generated by the energy transceiver coils and the signal transfer coils are shared, that is, the magnetic circuit generated by the energy transceiver coils passes through both the first inward protruding ring and the first outward protruding ring, and also passes through the second inward protruding ring and the second outward protruding ring, and the magnetic circuit directions are the same. Thus, a closed-loop magnetic circuit will not be generated in the ring formed by the first groove and the third groove, and further, it will not affect the magnetic circuit of the signal transfer coil, realizing effective isolation of energy and signal to ensure effective transfer of energy and signal between the power supply part and the power consumption part. Since the magnetic circuits generated by the energy transceiver coils and the energy coils are shared, the isolator is omitted, and the present invention can also reduce the size of the non-contact transfer system, and further make the non-contact transfer system applicable to narrow spaces.

[0035] To make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, detailed descriptions are as follows. Brief Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 Shows a cross-sectional view of a coupler in the prior art;

[0038] Figure 2 Shows a partial perspective view of the first magnetic conductive ring in an embodiment of the present invention;

[0039] Figure 3 Shows a partial perspective view of the second magnetic conductive ring in an embodiment of the present invention;

[0040] Figure 4Shows a cross-sectional schematic diagram of a non-contact transfer system with an energy and signal sharing magnetic circuit according to an embodiment of the present invention;

[0041] Figure 5 Shows a cross-sectional schematic diagram of a non-contact transfer system with an energy and signal sharing magnetic circuit according to another embodiment of the present invention;

[0042] Figure 6 Shows a cross-sectional schematic diagram of a non-contact transfer system with an energy and signal sharing magnetic circuit according to still another embodiment of the present invention;

[0043] Figure 7 Shows a cross-sectional schematic diagram of a non-contact transfer system with an energy and signal sharing magnetic circuit according to yet another embodiment of the present invention;

[0044] Figure 8 Shows a circuit connection schematic diagram of a non-contact transfer system with an energy and signal sharing magnetic circuit according to an embodiment of the present invention;

[0045] Figure 9 Shows the present invention Figure 8 Specific circuit connection schematic diagram of the non-contact transfer system with the energy and signal sharing magnetic circuit shown.

[0046] Explanation of reference numerals in the drawings:

[0047] 110. Signal coil;

[0048] 120. Energy coil;

[0049] 200. First magnetic conductive ring;

[0050] 300. Second magnetic conductive ring;

[0051] 210. First magnetic ring;

[0052] 220. First groove;

[0053] 230. Second groove;

[0054] 310. Second magnetic ring;

[0055] 320. Third groove;

[0056] 330. Fourth groove;

[0057] 400. Signal transfer coil;

[0058] 500. Energy transceiver coil;

[0059] 510. Energy transmitting coil;

[0060] 520. Energy receiving coil;

[0061] 410. First signal transfer coil;

[0062] 420. Second signal transmission coil;

[0063] 610. Energy emission circuit;

[0064] 620. Energy receiving circuit;

[0065] 700. Communication circuit;

[0066] 800. Housing;

[0067] 600. Power supply unit for drilling instrument;

[0068] 611. Inverter device;

[0069] 612. High-frequency wave blocking circuit;

[0070] 621. Rectifier and filter circuit;

[0071] 622. High-frequency wave blocking circuit. Detailed implementation manner

[0072] In order to make the technical features and effects of the present invention more obvious, the technical solution of the present invention will be further described below with reference to the accompanying drawings. The present invention can also be illustrated or implemented by other different specific examples. Any equivalent transformation made by any person skilled in the art within the scope of the claims belongs to the protection scope of the present invention.

[0073] The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not limit the present invention. In addition, the same or similar reference numerals of elements / components used in the drawings and embodiments are used to represent the same or similar parts.

[0074] Regarding the magnetic circuits in the accompanying drawings of this article, they are partial magnetic circuits at a certain moment for illustration and do not represent all the magnetic circuit forms in all states of the instrument.

[0075] Regarding the "first", "second",... used in this article, they do not particularly refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described with the same technical terms.

[0076] In the description of this specification, the descriptions referring to terms such as "one embodiment", "a specific embodiment", "some embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present invention, and the order of steps is not limited and can be adjusted appropriately as needed.

[0077] In one embodiment of the present invention, as Figure 2 , Figure 3 and Figure 4 shown, Figure 2 shows a partial perspective view of the first magnetic conduction ring of the embodiment of the present invention, Figure 3 shows a partial perspective view of the second magnetic conduction ring of the embodiment of the present invention, Figure 4 shows a schematic cross-sectional view of a non-contact transfer system with an energy and signal sharing magnetic circuit. The present invention can achieve effective isolation of energy and signals to ensure the effective transfer of energy and signals between the power supply part and the power consumption part. It has the characteristics of small size and can be applied to narrow spaces (such as drilling instruments, for realizing non-contact electrical connection between the power supply part and the power consumption part of the drilling instrument. Among them, the power supply part of the drilling instrument can be a drive shaft with static bias rotary steering, and the power consumption part of the drilling instrument can be a non-rotating sleeve with static bias rotary steering, or a stable platform with dynamic bias rotary steering). The power supply part of the drilling instrument can also be any block containing a power source in the drill string, and the power consumption part of the drilling instrument can be any block containing an electrical appliance, not limited to rotary steering instruments.

[0078] Specifically, a non-contact transfer system with an energy and signal sharing magnetic circuit includes: a first magnetic conduction ring 200 and a second magnetic conduction ring 300 nested with each other.

[0079] Among them, the first magnetic conduction ring 200 includes: a first magnetic ring 210, a first inwardly protruding ring A1, a second inwardly protruding ring B1, and a third inwardly protruding ring C1 arranged inside the first magnetic ring 210. A first groove 220 is formed between the first inwardly protruding ring A1 and the second inwardly protruding ring B1, and a second groove 230 is formed between the second inwardly protruding ring B1 and the third inwardly protruding ring C1.

[0080] The second magnetic conduction ring 300 includes: a second magnetic ring 310, a first outwardly protruding ring A2 disposed outside the second magnetic ring 310 and corresponding to the protruding ring in the first magnetic conduction ring 200, a second outwardly protruding ring B2, and a third outwardly protruding ring C2 (i.e., the first inwardly protruding ring A1 corresponds to the first outwardly protruding ring A2, the second inwardly protruding ring B1 corresponds to the second outwardly protruding ring B2, and the third inwardly protruding ring C1 corresponds to the third outwardly protruding ring C2). A third groove 320 is formed between the first outwardly protruding ring A2 and the second outwardly protruding ring B2, and a fourth groove 330 is formed between the second outwardly protruding ring B2 and the third outwardly protruding ring C2).

[0081] The first groove 220 and the third groove 320 are respectively used to accommodate the signal transmission coil 400.

[0082] The second groove 230 and the fourth groove 330 are respectively used to accommodate the energy transceiver coil 500 (energy transmitting coil or energy receiving coil).

[0083] Generally, the energy transmitting coil is disposed in the second groove 230, and the energy receiving coil is disposed in the fourth groove 330. The energy transceiver coil 500 and the signal transmission coil 400 share the magnetic path formed by the first magnetic conduction ring 200 and the second magnetic conduction ring 300. The magnetic paths of the first magnetic conduction ring 200 and the second magnetic conduction ring 300 are connected magnetic paths in the height direction. When currents are generated in the signal transmission coil and the energy transceiver coil, a magnetic path in the shape of a "solenoid" as indicated by the arrows in Figure 4 can be formed, thereby greatly shortening the total height of the magnetic conduction ring.

[0084] The non-contact transmission system provided in this embodiment can be applied to oil drilling tools, especially for static bias rotary steering, or in scenarios where non-contact energy transmission is required in oil drilling instruments, for power supply to the power supply unit 600 of the drilling instrument (as shown in Figure 5 ) and power and signal transmission between the power-consuming parts.

[0085] In this embodiment, the second magnetic conduction ring 300 is nested in the first magnetic conduction ring 200. Since the magnetic field generated by the signal transmission coil 400 is small, it will not affect the energy transceiver coil 500. The magnetic path of the magnetic field generated by the energy transceiver coil 500 is as shown in Figure 4As shown by the arrow, the magnetic path of the energy transceiver coil 500 passes through the magnetic paths of the first inwardly protruding ring A1 and the second outwardly protruding ring A2, and has the same direction as the magnetic paths of the second inwardly protruding ring B1 and the second outwardly protruding ring B2. As a result, a closed-loop magnetic path will not be generated in the circular ring formed by the first groove 220 and the third groove 320, and thus the magnetic path of the signal transmission coil will not be affected, achieving effective isolation of energy and signal to ensure the effective transmission of energy and signal between the power supply unit and the power consumption unit. Since the magnetic path generated by the energy transceiver coil shares the magnetic path generated by the signal transmission coil, the isolator is omitted. This embodiment can also reduce the size of the non-contact transmission system, and thus make the non-contact transmission system applicable to narrow spaces.

[0086] In an embodiment of the present invention, in order to achieve precise isolation of energy and signal, as Figure 4 shown, the height a1 of the first inwardly protruding ring is the same as the height a2 of the first outwardly protruding ring, the height b1 of the second inwardly protruding ring is the same as the height b2 of the second outwardly protruding ring, and the height c1 of the third inwardly protruding ring is the same as the height c2 of the third outwardly protruding ring.

[0087] In an embodiment of the present invention, in order to achieve precise isolation of energy and signal, the first inwardly protruding ring and the first outwardly protruding ring, the second inwardly protruding ring and the second outwardly protruding ring, and the third inwardly protruding ring and the third outwardly protruding ring satisfy the following relationships:

[0088] a ≤ c

[0089] b ≤ c

[0090] a + b ≥ c

[0091] Wherein, a is the height a1 of the first inwardly protruding ring or the height a2 of the first outwardly protruding ring, b is the height b1 of the second inwardly protruding ring or the height b2 of the second outwardly protruding ring, and c is the height c1 of the third inwardly protruding ring or the height c2 of the third outwardly protruding ring. In the present invention, the direction of the height is the axial direction of the signal transmission coil and the energy transceiver coil.

[0092] In an embodiment of the present invention, the convex surfaces of the first inwardly protruding ring A1, the second inwardly protruding ring B1, and the third inwardly protruding ring C1 are flush. The convex surfaces of the first outwardly protruding ring A2, the second outwardly protruding ring B2, and the third outwardly protruding ring C2 are flush.

[0093] In an embodiment of the present invention, the gap range between the protruding portions of the first magnetic conduction ring 200 and the second magnetic conduction ring 300 is 1 mm to 6 mm.

[0094] It should be noted that since relative rotation is required between the rotating body and the non-rotating body of the downhole instrument, a gap needs to be left. However, in order to ensure an effective magnetic circuit is formed between the first magnetic conduction ring 200 and the second magnetic conduction ring 300, the gap should not be too large.

[0095] In one embodiment of the present invention, as Figure 7 shown, in order to increase the strength of the magnetic conductor and enhance the magnetic conduction performance as much as possible while ensuring the accommodation of the coil, the depth d of the groove where the signal transmission coil is located is between 20% and 80% of the depth D of the groove where the energy transceiver coil is located.

[0096] Because the energy coil is thicker and the main function of the device is to achieve energy transfer, reducing the depths of the first groove and the third groove without affecting communication increases the magnetic conduction cross-sectional area for the energy transceiver function and helps the energy transceiver coil generate a more effective magnetic circuit.

[0097] In one embodiment of the present invention, for the convenience of manufacturing the first magnetic conduction ring and the second magnetic conduction ring, the first magnetic conduction ring and the second magnetic conduction ring are formed by pressing and fitting multiple transverse magnetic body rings, or are axially assembled by multiple longitudinal magnetic body blocks. Among them, the long axis direction of the longitudinal magnetic body blocks is consistent with the axial direction of the energy transceiver coil and the signal transmission coil.

[0098] In one embodiment of the present invention, to avoid signal interference, the first magnetic conduction ring and the second magnetic conduction ring are arranged in a housing 800 made of titanium alloy (as Figure 2 shown).

[0099] In one embodiment of the present invention, to avoid damage to the first magnetic conduction ring and the second magnetic conduction ring, when the non-contact transfer system is in use, a shock-absorbing material is arranged on the outer side of the housing. Specifically, the shock-absorbing material can be any one or a combination of a rubber ring, a PEEK ring, and an expansion ring.

[0100] In one embodiment of the present invention, the first magnetic conduction ring and the second magnetic conduction ring are made of ferrite material.

[0101] In one embodiment of the present invention, the non-contact transfer system for sharing the energy and signal magnetic circuit further includes: at least one set of energy transceiver coils and at least one set of signal transmission coils. Each set of signal transmission coils includes a first signal transmission coil 410 and a second signal transmission coil 420, and each set of energy transceiver coils includes an energy emission coil 510 and an energy reception coil 520. It should be noted that the nesting relationship between the energy emission coil 510 and the energy reception coil 520 is not absolute, and the key lies in the direction of the current flow. If the inner ring is connected to the power supply part of the drilling instrument, the inner energy emission coil 510 is arranged on the inner ring magnet, and the related structures such as the first magnetic conduction ring 200 are arranged on the outer ring.

[0102] In some embodiments, asFigure 5 As shown, the first signal transmission coil 410 and the energy transmission coil 510 are respectively arranged in the grooves of the first magnetic conduction ring 200. The first magnetic conduction ring 200 is connected to the power supply part 600 of the drilling instrument. The second signal transmission coil 420 and the energy receiving coil 520 are respectively arranged in the grooves of the second magnetic conduction ring 300. The second magnetic conduction ring 300 is connected to the power consumption part of the drilling instrument.

[0103] In other embodiments, such as Figure 6 As shown, the first signal transmission coil 410 and the energy transmission coil 510 are respectively arranged in the grooves of the second magnetic conduction ring 300. The second magnetic conduction ring 300 is connected to the power supply part of the drilling instrument. The second signal transmission coil 420 and the energy receiving coil 520 are respectively arranged in the grooves of the first magnetic conduction ring 200. The first magnetic conduction ring 200 is connected to the power consumption part of the drilling instrument.

[0104] In an embodiment of the present invention, such as Figure 8 and Figure 9 As shown, the non-contact transmission system of the energy and signal sharing magnetic circuit further includes: an energy transmission circuit 610, an energy receiving circuit 620 and a communication circuit 700. Among them, the energy transmission circuit 610 and the energy receiving circuit 620 form a voltage-type series resonance circuit.

[0105] The energy transmission circuit 610 is connected to the energy transmission coil 510, and is used to obtain electric energy from the power supply part of the drilling instrument and provide high-frequency alternating current for the energy transmission coil.

[0106] The energy receiving circuit 620 is connected to the energy receiving coil 520, and is used to perform transformation processing on the energy received by the energy receiving coil and transmit the transformed energy to the power consumption part of the drilling instrument.

[0107] The communication circuit 700 is connected to each set of signal transmission coils and is used to receive and transmit communication signals. Specifically, the communication circuit includes a signal sending circuit and a signal receiving circuit. The signal sending circuit and the signal receiving circuit can receive and send information to each other, and its communication method is half-duplex communication. The communication circuit 700 also includes: a digital-to-analog conversion circuit and an analog-to-digital conversion circuit, a signal modulation circuit and a signal demodulation circuit, and a signal filtering circuit. It should be noted that here, two-way communication is taken as an example. Therefore, there are two communication circuits in the system, which are respectively arranged in the power supply part and the power consumption part of the drilling instrument for communication between the power supply part and the power consumption part of the drilling instrument.

[0108] Specifically, the energy emission circuit 610 at least includes: an inverter device 611 and a resonant capacitor. The inverter device is connected to the energy emission coil and is used to obtain electrical energy from the power supply unit of the drilling instrument, convert the obtained electrical energy into high-frequency alternating current, and provide high-frequency alternating current for the energy emission coil. Specifically, the inverter device is a voltage-type resonant inverter circuit. The drilling instrument includes rotary steering. Generally, a downhole turbine generator is arranged at the upper part of the rotary steering. The downhole turbine generator can provide electrical energy for the emission coil. The resonant capacitor is connected in series in the loop of the energy emission circuit.

[0109] Furthermore, the energy emission circuit further includes: a high-frequency wave blocking circuit 612, which is connected between the inverter device and the energy emission coil. The center frequency of the high-frequency wave blocking circuit is the carrier frequency of the communication circuit. By setting the high-frequency wave blocking circuit, it can prevent the high-frequency carrier on the signal transmission coil from being coupled into the resonant capacitor in the energy emission circuit under the action of the magnetic field mechanism formed by the first magnetic conductive ring and the second magnetic conductive ring and reversely interfering with the communication circuit. Specifically, the high-frequency wave blocking circuit is a high-frequency wave blocking circuit composed of an inductor and a capacitor.

[0110] The energy receiving circuit 620 includes: a rectifying and filtering circuit 621, which is used to rectify and filter the electrical energy received by the energy receiving coil, so as to provide stable direct current for the electrical appliances on the power-consuming part.

[0111] Furthermore, the energy receiving circuit further includes: a high-frequency wave blocking circuit 622, which is connected between the rectifying and filtering circuit and the energy receiving coil. The center frequency of the high-frequency wave blocking circuit is the carrier frequency of the communication circuit. By setting the high-frequency wave blocking circuit, it can prevent the interference of energy transfer on signal transfer.

[0112] The carrier frequency of the communication circuit is 15 - 40 times the center frequency of the energy emission circuit. In a specific embodiment, the carrier frequency of the communication circuit is between 200k - 1600k, and the center frequency of the energy emission circuit is between 20k - 50k. It should be noted that due to the spatial dimension limitation of the wellbore. Therefore, the diameter of the magnetic conductor is between 100 - 200 millimeters. Experiments show that the center frequency of the emission circuit is more suitable at 20 - 50k. When the center frequency is fixed, the interference is smaller when the signal propagation frequency is between 200 - 1600k.

[0113] The non-contact transfer system of the energy and signal sharing magnetic circuit provided by the present invention is configured with a first magnetic conductive ring and a second magnetic conductive ring nested with each other. The first magnetic conductive ring includes a magnetic ring, a first inward protruding ring, a second inward protruding ring, and a third inward protruding ring arranged on the inner side of the magnetic ring. A first groove is formed between the first inward protruding ring and the second inward protruding ring, and a second groove is formed between the second inward protruding ring and the third inward protruding ring. The second magnetic conductive ring includes a magnetic ring, a first outward protruding ring, a second outward protruding ring, and a third outward protruding ring arranged on the outer side of the magnetic ring and corresponding to the protruding rings in the first magnetic conductive ring. A third groove is formed between the first outward protruding ring and the second outward protruding ring, and a fourth groove is formed between the second outward protruding ring and the third outward protruding ring. The first groove and the third groove are respectively used to accommodate signal transfer coils; the second groove and the fourth groove are respectively used to accommodate energy transceiver coils, so that the magnetic circuits generated by the energy transceiver coils and the signal transfer coils are shared, that is, the magnetic circuit generated by the energy transceiver coils passes through both the first inward protruding ring and the first outward protruding ring, and also passes through the second inward protruding ring and the second outward protruding ring, and the magnetic circuit directions are the same. Thus, a closed-loop magnetic circuit will not be generated in the ring formed by the first groove and the third groove, and further, it will not affect the magnetic circuit of the signal transfer coil, realizing effective isolation of energy and signal to ensure effective transfer of energy and signal between the power supply part and the power consumption part. Because the magnetic circuit generated by the energy transceiver coil and the magnetic circuit generated by the energy coil are shared, the isolator is omitted, and the present invention can also reduce the size of the non-contact transfer system, and further make the non-contact transfer system applicable to narrow spaces.

[0114] The above is only used to illustrate the technical solution of the present invention. Any person of ordinary skill in the art can modify and change the above embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of the right protection of the present invention shall be subject to the scope of the claims.

Claims

1. A non-contact transfer system with an energy and signal sharing magnetic circuit, characterized in that Comprising: A first magnetic conductive ring and a second magnetic conductive ring nested with each other; Wherein, the first magnetic conductive ring includes: a first magnetic ring, a first inwardly protruding ring, a second inwardly protruding ring, and a third inwardly protruding ring disposed inside the first magnetic ring. A first groove is formed between the first inwardly protruding ring and the second inwardly protruding ring, and a second groove is formed between the second inwardly protruding ring and the third inwardly protruding ring; The second magnetic conductive ring includes: a second magnetic ring, a first outwardly protruding ring, a second outwardly protruding ring, and a third outwardly protruding ring disposed outside the second magnetic ring and corresponding to the protruding rings in the first magnetic conductive ring. A third groove is formed between the first outwardly protruding ring and the second outwardly protruding ring, and a fourth groove is formed between the second outwardly protruding ring and the third outwardly protruding ring; The first groove and the third groove are respectively used for accommodating signal transmission coils; The second groove and the fourth groove are respectively used for accommodating energy receiving or energy transmitting coils; The first inwardly protruding ring and the first outwardly protruding ring, the second inwardly protruding ring and the second outwardly protruding ring, and the third inwardly protruding ring and the third outwardly protruding ring satisfy the following relationship: a ≤ c, b ≤ c, a + b ≥ c; Wherein, a is the height of the first inwardly protruding ring or the first outwardly protruding ring, b is the height of the second inwardly protruding ring or the second outwardly protruding ring, and c is the height of the third inwardly protruding ring or the third outwardly protruding ring.

2. The non-contact transfer system according to claim 1, characterized in that, Further comprising: At least one set of energy transmitting coils and energy receiving coils and at least one set of signal transmission coils; Each set of signal transmission coils includes a first signal transmission coil and a second signal transmission coil; The first signal transmission coil and the energy transmitting coil are respectively disposed in the grooves of the first magnetic conductive ring, and the first magnetic conductive ring is connected to the power supply part of the drilling instrument. The second signal transmission coil and the energy receiving coil are respectively disposed in the grooves of the second magnetic conductive ring, and the second magnetic conductive ring is connected to the power consumption part of the drilling instrument; or The first signal transmission coil and the energy transmitting coil are respectively disposed in the grooves of the second magnetic conductive ring, and the second magnetic conductive ring is connected to the power supply part of the drilling instrument. The second signal transmission coil and the energy receiving coil are respectively disposed in the grooves of the first magnetic conductive ring, and the first magnetic conductive ring is connected to the power consumption part of the drilling instrument.

3. The non-contact transfer system according to claim 2, wherein Further comprising: An energy transmitting circuit, an energy receiving circuit, and a communication circuit; The energy transmitting circuit is connected to the energy transmitting coil, and is used to obtain electric energy from the power supply part of the drilling instrument and provide high-frequency alternating current for the energy transmitting coil; The energy receiving circuit is connected to the energy receiving coil, and is used to perform conversion processing on the energy received by the energy receiving coil and transmit the converted energy to the power consumption part of the drilling instrument; The communication circuit is connected to the first signal transmission coil and the second signal transmission coil, and is used to transmit and receive signals.

4. The non-contact transfer system according to claim 3, wherein, The energy receiving circuit includes: a rectifying and filtering circuit, which is used to perform rectifying and filtering processing on the energy received by the energy receiving coil.

5. The non-contact transfer system according to claim 4, wherein, The energy receiving circuit further includes: a high-frequency wave blocking circuit connected between the rectifying and filtering circuit and the energy receiving coil, and a center frequency of the high-frequency wave blocking circuit is a carrier frequency of the communication circuit.

6. The non-contact transfer system according to claim 3, wherein The energy transmitting circuit includes at least one set of an inverter device and a resonant capacitor; The inverter device is connected to the energy transmitting coil, and is configured to obtain electric energy from a power supply unit of the drilling instrument, convert the obtained electric energy into alternating current, and provide high-frequency alternating current for the energy transmitting coil; The resonant capacitor is connected in series in a loop of the energy transmitting circuit.

7. The non-contact transfer system according to claim 6, wherein The energy transmitting circuit further includes: a high-frequency wave blocking circuit connected between the inverter device and the energy transmitting coil, and a center frequency of the high-frequency wave blocking circuit is a carrier frequency of the communication circuit.

8. The non-contact transfer system according to claim 3, wherein The carrier frequency of the communication circuit is 15-40 times of a center frequency of the energy transmitting circuit.

9. The non-contact transfer system according to claim 1, wherein A depth of a groove where the signal transmission coil is located is between 20%-80% of depths of grooves where the energy receiving coil and the energy transmitting coil are located.

10. The non-contact transfer system according to claim 1, characterized in that, A convex surface of the first inwardly protruding ring, a convex surface of the second inwardly protruding ring, and a convex surface of the third inwardly protruding ring are flush; A convex surface of the first outwardly protruding ring, a convex surface of the second outwardly protruding ring, and a convex surface of the third outwardly protruding ring are flush.

11. The non-contact transfer system according to claim 1, wherein, The first magnetic conduction ring and the second magnetic conduction ring are formed by tightly pressing and splicing a plurality of transverse magnetic ring, or are formed by splicing a plurality of longitudinal magnetic blocks along an axial direction of the coil.

12. The non-contact transfer system according to claim 1, wherein The first magnetic conduction ring and the second magnetic conduction ring are arranged in a housing made of titanium alloy.

13. The non-contact transfer system according to claim 12, characterized in that, When the non-contact transmission system is in use, a shock-absorbing material is arranged on an outer side of the housing.

14. The non-contact transfer system according to claim 1, characterized in that, The first magnetic conduction ring and the second magnetic conduction ring are made of ferrite material.

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