While-drilling power generation device

Abstract

The utility model provides a power supply device while drilling, and belongs to the field of oil and gas development and exploration. The while-drilling power generation device comprises a permanent magnet rotating component installed in an inner hole of the drill collar and an induction coil component installed on the wall of the drill collar. The permanent magnet rotating component comprises two bearings fixed in an inner hole of the drill collar, an intermediate shaft is fixedly connected between the two bearings, a permanent magnet piece fixing frame and turbine blades are arranged on the intermediate shaft, and a permanent magnet piece is arranged on the permanent magnet piece fixing frame; and the induction coil component is arranged corresponding to the permanent magnet sheet fixing frame. In the drilling process, turbine blades are driven to rotate along with drilling fluid, the turbine blades drive an intermediate shaft to rotate, then the intermediate shaft drives a permanent magnet piece fixing frame and a permanent magnet piece to rotate, and an alternating magnetic field is formed around an inner hole of a drill collar along with high-speed rotation of the permanent magnet piece; the induction coil induces and generates an alternating current power supply under the action of an alternating magnetic field generated by the permanent magnet rotating part. The utility model is used for providing a power supply for measurement while drilling, control and transmission instruments and equipment.

Description

Technical Field

[0001] The utility model belongs to the field of oil and gas development and exploration, and in particular relates to a power supply device while drilling. Background Art

[0002] Drilling exploration is characterized by high investment and high risk. With the increasing depletion of oil and gas resources, the depth and complexity of the exploration and development formations are gradually increasing, and the investment and risk are also increasing. In order to reduce the risk of oil and gas drilling development and save capital investment, instruments and tools such as logging while drilling (LWD), measurement while drilling (MWD) or near-bit gamma measurement are often used in the drilling process to collect bottom hole formation parameters and transmit data to the ground, so that drilling engineers can understand the bottom hole formation and guide the geological guidance decision while drilling. The drilling instrument is generally equipped with a battery or a drilling fluid power generation device to provide sufficient power for the normal operation of the drilling instrument or equipment.

[0003] The batteries used in downhole instruments are generally high-temperature non-rechargeable lithium batteries. The batteries need to be replaced after the instrument is used, and the used batteries need to be properly stored and recycled. The replacement, storage, and recycling of batteries bring inconvenience to battery users. If they are not handled properly, there are safety and environmental pollution risks. Existing drilling fluid power generation devices are generally tubular structures that provide power for tubular MWD. ​​At present, there is no drilling fluid power generation device that can be directly used for drill collar-type downhole instruments. If you want to power instruments with drill collar structures, you need a mechanical interface for MWD-LWD conversion. In some occasions, such as drill collar-type near-drill-bit measuring instruments, the existing drilling fluid power generation device cannot be used, and frequent battery replacement brings inconvenience to the use and maintenance of the instrument. Utility Model Content

[0004] The utility model aims to solve the above-mentioned problems existing in the prior art and provide a power-generating device while drilling, which can be directly used for a drill collar type measuring-while-drilling instrument and a near-drill-bit measuring instrument to provide power for the instrument and reduce the mechanical interface components of the MWD-LWD conversion; when maintaining the power-generating device while drilling, there is no need to disassemble the measuring-while-drilling instrument body, thereby reducing the maintenance workload.

[0005] The utility model is realized through the following technical solutions:

[0006] The utility model provides a drilling power generation device for providing power to a drill collar type drilling measurement instrument, comprising a permanent magnetic rotating component installed in the inner hole of the drill collar and an induction coil component installed on the wall of the drill collar;

[0007] The permanent magnet rotating component comprises two bearings fixed in the inner hole of the drill collar, an intermediate shaft is fixedly connected between the two bearings, a permanent magnet piece fixing frame and turbine blades are arranged on the intermediate shaft, and a permanent magnet piece is arranged on the permanent magnet piece fixing frame;

[0008] The induction coil component is arranged corresponding to the permanent magnet sheet fixing frame.

[0009] The further improvement of the utility model is:

[0010] A plurality of permanent magnet piece fixing grooves are arranged on the outer surface of the permanent magnet piece fixing frame, and the permanent magnet pieces are embedded in the permanent magnet piece fixing grooves.

[0011] The further improvement of the utility model is:

[0012] A plurality of permanent magnet piece fixing grooves are evenly arranged on the outer surface of the permanent magnet piece fixing frame along the circumferential direction, and the permanent magnet piece fixing grooves are all arranged along the axial direction.

[0013] The further improvement of the utility model is:

[0014] The outer diameter of the permanent magnet sheet fixing frame is smaller than the diameter of the inner hole of the drill collar.

[0015] The further improvement of the utility model is:

[0016] A plurality of turbine blades are evenly arranged on the intermediate shaft along the circumferential direction.

[0017] The further improvement of the utility model is:

[0018] A groove is axially arranged on the outer wall of the drill collar, and the induction coil component is arranged in the groove.

[0019] The further improvement of the utility model is:

[0020] The induction coil component comprises a non-magnetic frame fixed in a groove, a soft magnetic core is arranged in the non-magnetic frame, and a plurality of turns of coils are tightly wound on the soft magnetic core.

[0021] The further improvements of the utility model are as follows:

[0022] The multi-turn coil and the soft magnetic core are fixed in the non-magnetic frame by potting.

[0023] The further improvement of the utility model is:

[0024] A power processing circuit is also arranged in the groove, and the power processing circuit is connected to the multi-turn coil through an electric wire.

[0025] The further improvement of the utility model is:

[0026] The power processing circuit includes an overvoltage protector, a rectifier circuit, a current protector and a DCDC conversion circuit which are connected in sequence.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] The utility model discloses a power generation device while drilling, comprising a permanent magnetic rotating component installed in the inner hole of a drill collar and an induction coil component installed in the wall of the drill collar. During the drilling process, an alternating magnetic field is formed around the inner hole of the drill collar as the permanent magnetic rotating component rotates at a high speed. Under the action of the alternating magnetic field generated by the permanent magnetic rotating component, the induction coil component generates an AC power supply by induction, so as to provide power for a drill collar type while drilling measuring instrument and a near-drill-bit measuring instrument. The utility model has a simple structure and does not require a mechanical interface component for MWD-LWD conversion.

[0029] The utility model provides a power processing circuit which is connected to the induction coil component assembly. The AC power generated by the induction coil component is rectified by the power circuit to provide a DC working power supply for the while drilling measurement or control system.

[0030] The utility model can replace easily consumable parts without disassembling the drill collar body, thereby reducing the maintenance workload.

[0031] The utility model discloses a power generation device while drilling, which is used to provide power for the measurement, control and transmission instruments while drilling, so that the instruments while drilling can obtain sufficient power to carry out normal measurement, control and transmission work. The ground engineer can understand the bottom hole trajectory and the formation conditions encountered in real time through the measurement data transmitted to the ground by the instruments while drilling, and provide data support for the engineering while drilling and geological guidance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of a power generation while drilling device according to an exemplary embodiment of the utility model;

[0033] Figure 2 It is a structural schematic diagram of a permanent magnetic rotating component of an exemplary embodiment of the utility model;

[0034] Figure 3 It is a schematic diagram of the induction coil components and circuit installation of an exemplary embodiment of the utility model;

[0035] Figure 4 It is a schematic diagram of the composition structure of the power processing circuit of the exemplary embodiment of the utility model.

[0036] In the figure, 1, drill collar wall, 2, drill collar inner hole, 3, pressure-resistant cover plate, 4, induction coil component, 4-1, multi-turn coil, 5, power processing circuit, 6, permanent magnet rotating component, 6-1, first bearing support frame, 6-2, second bearing support frame, 6-3, turbine blade, 6-4, permanent magnet piece fixing frame, 6-5, permanent magnet piece fixing groove, 7, groove, 8, bolt mounting hole. DETAILED DESCRIPTION

[0037] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0038] [Example 1]

[0039] like Figure 1 and Figure 2 As shown, the utility model provides a power generation device while drilling, which is used to provide power for a drill collar type measurement while drilling instrument, including a permanent magnetic rotating component 6 installed in the inner hole 2 of the drill collar and an induction coil component 4 installed on the drill collar wall 1;

[0040] The permanent magnet rotating component 6 includes two bearings fixed to the inner hole 2 of the drill collar, an intermediate shaft is fixedly connected between the two bearings, a permanent magnet piece fixing frame 6-4 and a turbine blade 6-3 are arranged on the intermediate shaft, and a permanent magnet piece is arranged on the permanent magnet piece fixing frame 6-4;

[0041] The induction coil component 4 is arranged corresponding to the permanent magnet piece fixing frame 6-4, so that when the permanent magnet piece fixing frame 6-4 drives the permanent magnet piece to rotate, the induction coil component 4 induces an AC power supply under the action of the changing magnetic field generated by the rotation of the permanent magnet rotating component 6 in the drill collar.

[0042] During the drilling process, as the drilling fluid drives the turbine blades 6-3 to rotate, the turbine blades 6-3 drive the intermediate shaft to rotate, and the intermediate shaft drives the permanent magnet plate fixing frame 6-4 and the permanent magnet plate to rotate. As the permanent magnet plate rotates at high speed, an alternating magnetic field is formed around the inner hole 2 of the drill collar. Under the action of the alternating magnetic field generated by the permanent magnet rotating component, the induction coil component 4 induces an AC power supply.

[0043] [Example 2]

[0044] like Figure 2 As shown, the permanent magnetic rotating component 6 includes a first bearing and a second bearing arranged relatively to each other, and the first bearing and the second bearing are respectively fixed in the inner hole 2 of the drill collar by a first bearing support frame 6-1 and a second bearing support frame 6-2. Specifically, the first bearing is fixed in the first bearing support frame 6-1, and the first bearing support frame 6-1 is fixed to the inner wall of the drill collar by a pin, and the second bearing is fixed in the second bearing support frame 6-2, and the second bearing support frame 6-2 is fixed to the inner wall of the drill collar by a pin; in this way, the entire permanent magnetic rotating component 6 is fixed in the inner hole 2 of the drill collar by the first bearing support frame 6-1 and the second bearing support frame 6-2. When parts need to be replaced or repaired and maintained, the first bearing support frame 6-1 and the second bearing support frame 6-2 fixed in the inner hole 2 of the drill collar can be removed to realize the disassembly of the entire permanent magnetic rotating component 6, and it can be replaced or repaired and maintained without disassembling the drill collar body, thereby reducing the maintenance workload.

[0045] The outer diameters of the first bearing support frame 6 - 1 and the second bearing support frame 6 - 2 are the same as the diameter of the inner hole 2 of the drill collar.

[0046] The intermediate shaft is fixed between the first bearing and the second bearing, and the permanent magnet plate fixing frame 6-4 and the turbine blade 6-3 are fixed on the intermediate shaft. The turbine blade 6-3 and the permanent magnet plate fixing frame 6-4 are limited between the first bearing and the second bearing, and the turbine blade 6-3 and the permanent magnet plate fixing frame 6-4 can rotate freely.

[0047] A plurality of permanent magnet piece fixing grooves 6-5 are evenly arranged along the circumferential direction on the outer surface of the permanent magnet piece fixing frame 6-4, and the permanent magnet piece fixing grooves 6-5 are all arranged along the axial direction, and the permanent magnet pieces are embedded in the permanent magnet piece fixing grooves 6-5.

[0048] The outer diameter of the permanent magnet piece fixing frame 6-4 is smaller than the diameter of the inner hole 2 of the drill collar to ensure that the permanent magnet piece fixing frame 6-4 can rotate freely.

[0049] A plurality of turbine blades 6 - 3 are evenly arranged along the circumferential direction on the intermediate shaft.

[0050] As the drilling fluid drives the turbine blades 6-3 to rotate, the turbine blades 6-3 drive the intermediate shaft to rotate, and the intermediate shaft drives the permanent magnet plate fixing frame 6-4 and the permanent magnet plate to rotate. As the permanent magnet plate rotates at high speed, an alternating magnetic field is formed around the inner hole 2 of the drill collar. The frequency of the alternating magnetic field is proportional to the rotation speed.

[0051] [Example 3]

[0052] like Figure 1 and Figure 3 As shown, a groove 7 is axially provided on the drill collar wall 1, and the induction coil component 4 is arranged in the groove 7. When the permanent magnet piece rotates at high speed, an alternating magnetic field is formed around the inner hole of the drill collar. Under the action of the alternating magnetic field generated by the permanent magnet rotating component 6, the induction coil component 4 induces an AC power supply.

[0053] The induction coil component 4 includes a non-magnetic frame (not shown in the figure) fixed in the groove 7, a soft magnetic core (not shown in the figure) is arranged in the non-magnetic frame, a multi-turn coil 4-1 is tightly wound on the soft magnetic core, and the multi-turn coil 4-1 and the soft magnetic core are fixed in the non-magnetic frame by potting, for example, epoxy resin or silicone rubber is poured in the non-magnetic frame to fix the multi-turn coil 4-1 and the soft magnetic core in the non-magnetic frame. The multi-turn coil 4-1 induces an AC power supply under the action of the alternating magnetic field generated by the permanent magnetic rotating component 6 in the inner hole 2 of the drill collar.

[0054] [Example 4]

[0055] like Figure 3 As shown, a power processing circuit 5 is also provided in the groove 7, and the power processing circuit 5 is connected to the multi-turn coil 4-1 through wires. The AC power induced by the multi-turn coil 4-1 is rectified by the power processing circuit to provide a DC working power supply for the while drilling measurement or control system.

[0056] like Figure 4 As shown, the power processing circuit 5 includes an overvoltage protector, a rectifier circuit, a current protector and a DCDC conversion circuit connected in sequence, so as to convert the rectifier power supply with unstable voltage into a DC power supply with stable voltage, thereby providing a stable power supply for the drilling instrument. The multi-turn coil 4-1 is connected to the overvoltage protector through a wire.

[0057] The function of the overvoltage protector is to prevent the coil from generating excessive voltage and causing damage to the subsequent circuit. It is composed of a self-recovery insurance element and a Zener diode. The rectifier circuit is composed of a rectifier diode and a capacitor. The current protector is a self-recovery insurance element. Its function is to prevent the subsequent circuit current from being too large, causing damage to the previous rectifier circuit or coil. The function of the DCDC conversion circuit is to convert the unstable voltage rectifier power supply into a stable voltage DC power supply, providing a stable power supply for the drilling instrument.

[0058] The overvoltage protector, the rectifier circuit, the current protector and the DCDC conversion circuit are all existing circuit structures and will not be described in detail here.

[0059] [Example 5]

[0060] A pressure-bearing cover plate 3 is arranged on the groove 7, and the pressure-bearing cover plate 3 is fixed to the drill collar wall 1 by bolts. Specifically, a plurality of bolt mounting holes 8 are arranged on the pressure-bearing cover plate 3, and a plurality of bolt holes are also arranged on the drill collar wall 1. The number of the bolt holes is the same as the number of the bolt mounting holes 8, and the positions correspond. The bolts pass through the bolt mounting holes 8 and the bolt holes in sequence to fix the pressure-bearing cover plate 3 to the drill collar wall 1.

[0061] The utility model discloses a power generation device while drilling, which is used to provide power for the measurement, control and transmission instruments while drilling, so that the instruments while drilling can obtain sufficient power to carry out normal measurement, control and transmission work. The ground engineer can understand the bottom hole trajectory and the formation conditions encountered in real time through the measurement data transmitted to the ground by the instruments while drilling, and provide data support for the engineering while drilling and geological guidance.

[0062] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0064] The above technical solution is only one implementation method of the utility model. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the utility model, and it is not limited to the technical solution described in the above specific embodiments of the utility model. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. A power generation device while drilling, used to provide power for a drill collar type measurement while drilling instrument, characterized in that: It includes a permanent magnetic rotating component installed in the inner hole of the drill collar and an induction coil component installed on the wall of the drill collar; The permanent magnet rotating component comprises two bearings fixed in the inner hole of the drill collar, an intermediate shaft is fixedly connected between the two bearings, a permanent magnet piece fixing frame and turbine blades are arranged on the intermediate shaft, and a permanent magnet piece is arranged on the permanent magnet piece fixing frame; The induction coil component is arranged corresponding to the permanent magnet sheet fixing frame.

2. The power generation while drilling device according to claim 1, characterized in that: A plurality of permanent magnet piece fixing grooves are arranged on the outer surface of the permanent magnet piece fixing frame, and the permanent magnet pieces are embedded in the permanent magnet piece fixing grooves.

3. The power generation while drilling device according to claim 2, characterized in that: A plurality of permanent magnet piece fixing grooves are evenly arranged on the outer surface of the permanent magnet piece fixing frame along the circumferential direction, and the permanent magnet piece fixing grooves are all arranged along the axial direction.

4. The power generation while drilling device according to claim 1, characterized in that: The outer diameter of the permanent magnet sheet fixing frame is smaller than the diameter of the inner hole of the drill collar.

5. The power generation while drilling device according to claim 1, characterized in that: A plurality of turbine blades are evenly arranged on the intermediate shaft along the circumferential direction.

6. The power generation while drilling device according to claim 1, characterized in that: A groove is axially arranged on the outer wall of the drill collar, and the induction coil component is arranged in the groove.

7. The power generation while drilling device according to claim 6, characterized in that: The induction coil component comprises a non-magnetic frame fixed in a groove, a soft magnetic core is arranged in the non-magnetic frame, and a plurality of turns of coils are tightly wound on the soft magnetic core.

8. The power generation while drilling device according to claim 7, characterized in that: The multi-turn coil and the soft magnetic core are fixed in the non-magnetic frame by potting.

9. The power generation while drilling device according to claim 7, characterized in that: A power processing circuit is also arranged in the groove, and the power processing circuit is connected to the multi-turn coil through an electric wire.

10. The power generation while drilling device according to claim 9, characterized in that: The power processing circuit includes an overvoltage protector, a rectifier circuit, a current protector and a DCDC conversion circuit which are connected in sequence.

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