Electric signal stepless rotation transmission device and top drive type drilling equipment

Abstract

The invention belongs to the technical field of oil exploration, and discloses an electric signal stepless rotation transmission device and top drive type drilling equipment, the transmission device comprises a fixed ring, a movable ring, a transmission assembly and a positive pressure explosion-proof assembly, the fixed ring and the movable ring are coaxially arranged, the movable ring can rotate relative to the fixed ring, and a gap exists between the movable ring and the fixed ring; the transmission assembly is static relative to one of the fixed ring and the movable ring and can form an electric signal between the fixed ring and the movable ring; the positive pressure explosion-proof assembly comprises a fan, a detection air pipe, a diad and a supply air pipe, the fan comprises a wind pressure switch, one end of the detection air pipe is connected with the wind pressure switch, the other end of the detection air pipe is connected with an air outlet of the fan, one end of the supply air pipe is communicated with the air outlet of the fan, the other end of the supply air pipe is communicated with the gap, and the diad is arranged on the supply air pipe. The electric signal stepless rotation transmission device can achieve transmission of electric signals between a fixing structure and a rotation structure of top drive equipment, and is simple in structure and small in occupied space.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum exploration, and in particular to an electric signal stepless rotation transmission device and a top drive drilling equipment. Background Art

[0002] Top drive technology (hereinafter referred to as top drive) is one of the major changes since the advent of rotary drilling rigs. Since the top drive system developed by Varco in the United States was put into use in December 1981, top drive has gradually been adopted as drilling equipment by the oil drilling industry in various countries around the world. The mechanical structure below the rotating head of the top drive equipment can be supported by the main bearing to meet 360° rotation. However, at the drilling site, various electromagnetic signals interfere seriously, and the power supply and electrical signal transmission of the top drive equipment can generally only be completed through the oil circuit of the rotating head in the form of hydraulic control. If a new control circuit is added, it is required:

[0003] 1. Increase the number of oil circuits, and the corresponding mechanical structure size will be larger. This method requires the replacement and disassembly of many parts, high cost, and long transformation cycle.

[0004] 2. Add a rotating drag chain. This method has limitations in installation and use due to the limited rotation angle and space of the rotating drag chain.

[0005] 3. Pull the pipeline externally. This method will lead to a messy layout of the pipelines on site, which is easy to cause the pipelines to be scraped during the top drive movement, posing a safety risk to on-site operations. In addition, the well team has a large number of pipes and cables on site, and the interference between the various electromagnetic signals generated is serious. Summary of the invention

[0006] One of the purposes of the present invention is to provide an electric signal stepless rotation transmission device for solving the problem of electric signal transmission when the top drive equipment rotates 360 degrees, and the device has a simple structure and a short installation or modification period.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] An electrical signal stepless rotating transmission device comprises a fixed ring, a movable ring, a transmission component and a positive pressure explosion-proof component, wherein the fixed ring and the movable ring are coaxially arranged, the movable ring can rotate relative to the fixed ring and there is a gap between the movable ring and the fixed ring; the transmission component is stationary relative to one of the fixed ring and the movable ring, and the transmission component can form an electrical signal between the fixed ring and the movable ring; the positive pressure explosion-proof component comprises a fan, a detection air pipe, a doublet and a supply air pipe, the fan comprises an air pressure switch, one end of the detection air pipe is connected to the air pressure switch, the other end of the detection air pipe is connected to the air outlet of the fan, one end of the supply air pipe is connected to the air outlet of the fan, the other end of the supply air pipe is connected to the gap, and the doublet is arranged on the supply air pipe.

[0009] Preferably, the transmission component includes a brush holder, which is fixed on one of the fixed ring or the movable ring, and is provided with a plurality of carbon brushes. A signal channel corresponding to the plurality of carbon brushes is provided on the other of the fixed ring or the movable ring, and the carbon brushes are in contact with the signal channel.

[0010] Preferably, the brush holder is fixed on the fixed ring, the fixed ring includes a stator upper cover, a stator outer shell and a brush holder fixing seat, the brush holder is arranged on the stator upper cover through the brush holder fixing seat, the stator upper cover is provided with a wire outlet hole, the stator outer shell is located outside the moving ring and is connected to the stator upper cover.

[0011] Preferably, a cable sealing ring is provided in the cable outlet hole.

[0012] Preferably, the stator ring adopts a split structure, including the stator upper cover formed by a plurality of upper cover ring segments and the stator outer shell formed by a plurality of outer shell ring segments.

[0013] Preferably, the dynamic ring includes a rotor and a fixed flange, the fixed flange is arranged at an end of the rotor away from the stator upper cover, and the signal channel is arranged on the end surface of the rotor or on the side wall of the rotor.

[0014] Preferably, the rotor comprises a plurality of rotor ring segments, and the plurality of rotor ring segments are enclosed to form an annular structure, and the number of the brush holders is consistent with the number of the rotor ring segments.

[0015] Preferably, a wire outlet groove extending in the radial direction is provided on the fixing flange, and a wire pressing block is provided in the wire outlet groove.

[0016] Another object of the present invention is to provide a top-drive drilling equipment, any of the above-mentioned stepless rotation transmission devices for electric signals, further comprising a driving mechanism, the driving mechanism comprising a reduction gearbox and a rotating shaft, the suspension body being able to rotate relative to the housing, the fixed ring in the stepless rotation transmission device for electric signals being arranged on the housing, and the moving ring in the stepless rotation transmission device for electric signals being arranged on the rotating shaft.

[0017] Beneficial effects of the present invention: The electric signal stepless rotating transmission device and the top-drive drilling equipment including the electric signal stepless rotating transmission device in the present invention use the transmission component to transmit signals between the fixed ring and the moving ring. The transmission component is stationary relative to one of the fixed ring or the moving ring. Compared with the traditional cable and light transmission, it does not twist with the rotation of the moving ring, avoiding the layout confusion caused by the traditional light and cable transmission, and has a simple structure and occupies a small space. At the same time, the safety during use can be improved by setting a positive pressure explosion-proof component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of one of the stepless rotation transmission devices for electrical signals in the embodiments of the present invention;

[0019] Figure 2 yes Figure 1 Side view of

[0020] Figure 3 yes Figure 1 Exploded view of;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of another stepless rotation transmission device for electric signals in an embodiment of the present invention;

[0022] Figure 5 yes Figure 4 Side view of

[0023] Figure 6 yes Figure 4 Exploded view of;

[0024] Figure 7 is a schematic diagram of a stepless rotation transmission device for electrical signals in an embodiment of the present invention;

[0025] Figure 8 It is a structural schematic diagram of a positive pressure explosion-proof component;

[0026] Fig. 9 It is a schematic diagram of the partial structure of the top drive drilling equipment.

[0027] In the figure:

[0028] 1. Fixed ring; 11. Stator upper cover; 12. Stator housing; 13. Brush holder fixing seat; 2. Moving ring; 21. Rotor; 22. Fixed flange; 22a. Wire outlet groove; 23. Wire pressing block; 3. Brush holder; 4. Detection air pipe; 5. Supply air pipe; 6. Double body;

[0029] 10. First lead-out cable; 20. Second lead-out cable; 30. Box; 40. Rotating shaft. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] refer to Figure 1-9As shown, the present invention proposes an electric signal stepless rotation transmission device, which includes a fixed ring 1, a moving ring 2 and a transmission assembly, wherein the fixed ring 1 and the moving ring 2 are coaxially arranged, wherein the fixed ring 1 is connected to a fixed structure (such as a reduction gearbox housing) in the top drive device, and the moving ring is connected to a rotary structure (such as a rotating shaft) in the top drive device, that is, the moving ring 2 and the fixed ring 1 can achieve 360° relative rotation, and there is a gap between the moving ring 2 and the fixed ring 1. The transmission assembly can form an electric signal between the fixed ring 1 and the moving ring 2 to achieve electric signal transmission, and the transmission assembly remains relatively stationary relative to one of the fixed ring 1 and the moving ring 2. Since the drilling equipment is used at the center of the wellhead and is in an explosion-proof area, the above-mentioned electric signal stepless rotation transmission device needs to meet the explosion-proof requirements of level 1 and zone 2 of the oil well site. Therefore, the electric signal stepless rotation transmission device also includes a positive pressure explosion-proof assembly, which connects the gap between the moving ring 2 and the fixed ring 1 through a connecting hole set on the fixed ring 1 to maintain a positive pressure environment in the gap. Specifically, the positive pressure explosion-proof assembly includes a fan, a supply line and a detection line, wherein the fan is turned on and off by a wind pressure switch, the detection line includes a detection air pipe 4, one end of the detection air pipe 4 is connected to the wind pressure switch, and the other end is connected to the air outlet of the fan, the supply line includes a double body 6 and a supply air pipe 5, one end of the supply air pipe 5 is connected to the wind pressure switch, and the other end is connected to the gap, and the double body 6 is arranged on the supply air pipe 5. Specifically, the supply air pipe 5 and the detection air pipe 4 are connected to the air outlet of the fan through a three-way joint.

[0035] refer to Figure 1-Figure 6 As shown, the transmission component includes a brush holder 3, which is fixed on one of the fixed ring 1 or the movable ring 2. The brush holder 3 is connected to the first lead-out cable 10. A plurality of carbon brushes are arranged on the brush holder 3. A signal channel corresponding to the plurality of carbon brushes is arranged on the other of the fixed ring 1 or the movable ring 2. The signal channel is connected to the second lead-out cable 20. During the relative rotation of the movable ring 2 and the fixed ring 1, the carbon brush is always in contact with the corresponding signal channel, thereby forming an electrical signal between the fixed ring 1 and the movable ring 2, and realizing electrical signal transmission between the first lead-out cable 10 and the second lead-out cable 20.

[0036] Optionally, the brush holder 3 is fixed on the fixed ring 1, and the fixed ring 1 includes a stator upper cover 11, a stator shell 12 and a brush holder fixing seat 13. The stator shell 12 is located outside the moving ring 2 and is detachably connected to the stator upper cover 11. The brush holder fixing seat 13 is arranged on the stator upper cover 11. The brush holder 3 is fixed on the brush holder fixing seat 13. The multiple cable cores of the first lead-out cable 10 are connected one-to-one with the multiple carbon brushes on the brush holder 3. The first lead-out cable 10 is led out through the lead-out hole arranged on the stator upper cover 11. In order to prevent the first lead-out cable 10 from moving relative to the stator upper cover 11, a cable sealing ring is arranged in the lead-out hole, and the first lead-out cable 10 passes through the cable sealing ring.

[0037] Optionally, the stator ring 1 adopts a split structure, including a stator upper cover 11 formed by a plurality of upper cover ring segments and a stator outer shell 12 formed by a plurality of outer shell ring segments, and the outer shell ring segments correspond to the upper cover ring segments one by one. Such an arrangement can reduce the difficulty of installing the stator ring 1, and the stator ring 1 can be installed on the fixed structure of the top drive equipment along the radial direction.

[0038] Optionally, the moving ring 2 includes a rotor 21 and a fixing flange 22, the fixing flange 22 is fixed to one end of the rotor 21 away from the stator cover 11, the rotor 21 is fixed to the rotating structure through the fixing flange 22, and the signal channel is arranged on the rotor 21, specifically, on one end face of the rotor 21 or on the side wall of the rotor 21. If it is arranged on the end face of the stator cover 11, multiple signal channels are arranged at intervals along the radial direction of the rotor 21, at this time, the brush holder 3 extends along the axial direction of the stator cover 11, and the entire electrical signal stepless rotation transmission device occupies less space in the radial direction. If it is arranged on the side wall of the stator cover 11, multiple signal channels are arranged at intervals along the axial direction of the rotor 21, the brush holder 3 extends along the radial direction of the stator cover 11, and the entire electrical signal stepless rotation transmission device occupies less space in the axial direction.

[0039] Similarly, the rotor 21 also adopts a split structure, including multiple rotor ring segments, which are enclosed to form an annular structure and fixed on the integrated fixed flange 22. It should be noted that the number of brush holders 3 is consistent with the number of rotor ring segments and is evenly distributed along the arc direction to ensure that during the rotation of the moving ring 2, at least one brush holder 3 can conduct the fixed ring 1 and the rotor 21 to ensure the conduction of the entire circuit.

[0040] In order to fix the second lead-out cable 20 relative to the dynamic ring 2 , a wire outlet groove 22 a extending radially along the fixed flange 22 is provided on the fixed flange 22 , and the second lead-out cable 20 is embedded in the wire outlet groove 22 a and fixed by a wire pressing block 23 .

[0041] The above-mentioned stepless rotating transmission device for electric signals utilizes the brush holder 3 to contact the signal channel to realize the transmission of electric signals between the fixed ring 1 and the moving ring 2. Compared with the traditional signal transmission relying on cables and optical fibers, it avoids the layout chaos, winding obstruction and scraping risks caused by traditional optical fiber and cable transmission. It has a simple structure, occupies a small installation space, and has little impact on the overall structure of the top drive equipment. When it is set to transform old and new equipment, the installation and transformation cycle is short, the maintenance cost is low, and the adverse effects such as winding obstruction and layout chaos are avoided, which is of great help to improve the function of the top drive equipment. At the same time, the positive pressure explosion-proof component can put the stepless rotating transmission device for electric signals in a positive pressure explosion-proof environment, which is highly safe when used.

[0042] refer to Fig. 9As shown, in this embodiment, a top-drive drilling equipment is proposed, including the above-mentioned stepless rotation transmission device for electric signals and a driving mechanism, wherein the driving mechanism includes a reduction box, and the reduction box includes a housing 30 and a rotating shaft 40, the fixed ring 1 is connected and fixed to the housing 30 by screws and anti-loosening washers, and the moving ring 2 is connected and passes through the rotating shaft 40 of the fixed ring 1 by screws and anti-loosening washers and performs 360° rotational movement with the rotating shaft 40. The stepless rotation transmission device for electric signals can realize 360° rotational transportation of electric signals of the top-drive drilling equipment from top to bottom.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An electrical signal stepless rotation transmission device, characterized in that: include: A fixed ring (1) and a movable ring (2) are coaxially arranged, wherein the movable ring (2) is capable of rotating relative to the fixed ring (1) and a gap exists between the movable ring (2) and the fixed ring (1); A transmission component, which is stationary relative to one of the fixed ring (1) and the movable ring (2), and is capable of forming an electrical signal between the fixed ring (1) and the movable ring (2); A positive pressure explosion-proof component comprises a fan, a detection air pipe (4), a doublet (6) and a supply air pipe (5), wherein the fan comprises a wind pressure switch, one end of the detection air pipe (4) is connected to the wind pressure switch, the other end of the detection air pipe (4) is connected to the air outlet of the fan, one end of the supply air pipe (5) is connected to the air outlet of the fan, the other end of the supply air pipe (5) is connected to the gap, and the doublet (6) is arranged on the supply air pipe (5).

2. The electrical signal stepless rotation transmission device according to claim 1, characterized in that: The transmission component comprises a brush holder (3), the brush holder (3) being fixed on one of the fixed ring (1) or the movable ring (2), a plurality of carbon brushes being arranged on the brush holder (3), a signal channel corresponding to the plurality of carbon brushes being arranged on the other of the fixed ring (1) or the movable ring (2), and the carbon brushes being in contact with the signal channel.

3. The electrical signal stepless rotation transmission device according to claim 2, characterized in that: The brush holder (3) is fixed on the fixed ring (1); the fixed ring (1) comprises a stator upper cover (11), a stator outer shell (12) and a brush holder fixing seat (13); the brush holder (3) is arranged on the stator upper cover (11) via the brush holder fixing seat (13); a wire outlet hole is arranged on the stator upper cover (11); the stator outer shell (12) is located outside the moving ring (2) and is connected to the stator upper cover (11).

4. The electrical signal stepless rotation transmission device according to claim 3, characterized in that: A cable sealing ring is arranged in the wire outlet hole.

5. The electrical signal stepless rotation transmission device according to claim 3, characterized in that: The stator ring (1) adopts a split structure, comprising the stator upper cover (11) formed by a plurality of upper cover ring segments and the stator outer shell (12) formed by a plurality of outer shell ring segments.

6. The electrical signal stepless rotation transmission device according to claim 3, characterized in that: The dynamic ring (2) comprises a rotor (21) and a fixing flange (22), wherein the fixing flange (22) is arranged at an end of the rotor (21) away from the stator upper cover (11), and the signal channel is arranged on an end surface of the rotor (21) or on a side wall of the rotor (21).

7. The electrical signal stepless rotation transmission device according to claim 6, characterized in that: The rotor (21) comprises a plurality of rotor ring segments, which are enclosed to form an annular structure, and the number of the brush holders (3) is consistent with the number of the rotor ring segments.

8. The electrical signal stepless rotation transmission device according to claim 6, characterized in that: The fixed flange (22) is provided with a wire outlet groove (22a) extending in the radial direction, and a wire pressing block (23) is provided in the wire outlet groove (22a).

9. Top drive drilling equipment, characterized in that: It comprises an electric signal stepless rotation transmission device as described in any one of claims 1 to 8, and also comprises a driving mechanism, wherein the driving mechanism comprises a reduction box, and the reduction box further comprises a housing (30) and a rotating shaft (40), wherein the rotating shaft (40) is capable of rotating relative to the housing (30), and the fixed ring (1) in the electric signal stepless rotation transmission device is arranged on the housing (30), and the moving ring (2) in the electric signal stepless rotation transmission device is arranged on the rotating shaft (40).

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