A downhole electromagnetic wave signal receiving sub-section

Abstract

The present invention discloses a downhole electromagnetic wave signal receiving sub, which relates to the technical field of electromagnetic wave signal receiving subs; it includes a sub installation cylinder, and fixing holes are arranged in an array on the inner side of the sub installation cylinder. A moving mechanism is arranged inside the sub installation cylinder, and the moving mechanism includes a moving seat, and limiting mechanisms are respectively arranged at the upper and lower ends of the moving seat; a matching mechanism is arranged on the moving seat, and a receiving mechanism is arranged on the sub installation cylinder. The receiving mechanism includes a receiving installation seat, and a fixing shaft is radially telescopically arranged on the receiving installation seat. The fixing shaft is fixed by cooperating with the fixing holes; the matching mechanism includes a matching shaft radially movably arranged on the moving seat, and the matching shaft cooperates with the receiving installation seat to drive the receiving mechanism to move; an inspection mechanism is arranged at the bottom end of the moving seat for inspecting and processing the sub installation cylinder; the present invention can adjust the distance between the transmitting source and the receiving source in real time, and can separately inspect the deformation inside the sub.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic wave signal receiving subsections, and particularly to an underground electromagnetic wave signal receiving subsection. Background Art

[0002] The receiving subsections of underground electromagnetic wave signals are widely used in aspects such as mine safety communication, automation control, positioning systems, etc. The wireless communication system in a mine often relies on electromagnetic wave signal transmission to achieve personnel positioning, environmental monitoring, equipment control, etc. A subsection can be used to describe the short transmission section of the signal receiving module in these systems. The current receiving subsections of underground electromagnetic wave signals are used to receive the electromagnetic wave signals emitted by the transmitting antenna of a rotary steerable tool. Rotary steerable drilling is one of the most popular drilling technologies at present. Contemporary information technology provides technical support for the development of this technology, and the exploitation of more complex oil and gas reservoirs provides an application and practice environment for this technology; the transmission efficiency of electromagnetic waves is related to the medium, distance, metal shielding, etc. Theoretically, the closer the distance, the more beneficial it is for the transmission of electromagnetic waves, but too close a distance will cause interference. Therefore, in a complex underground environment, by adjusting the distance between the receiver and the transmitter in real time, adverse multipath effects can be avoided, thereby improving the reception quality. Based on this, the present invention proposes an electromagnetic wave signal receiving subsection that can adjust the distance between the emission source and the reception source in real time and can separately check for deformation inside the subsection. Summary of the Invention

[0003] Aiming at the above technical problems, the present invention can adjust the distance between the emission source and the reception source in real time and can separately check for deformation inside the subsection.

[0004] The solution adopted by the present invention is as follows: An underground electromagnetic wave signal receiving subsection includes a subsection installation cylinder. Fixed holes are arranged in an array on the inner side of the subsection installation cylinder. A moving mechanism is arranged inside the subsection installation cylinder. The moving mechanism includes a lead screw one rotatably installed inside the subsection installation cylinder and a moving seat that forms a screw pair with the lead screw one. Limiting mechanisms are respectively arranged at the upper and lower ends of the moving seat; a matching mechanism is arranged on the moving seat, and a receiving mechanism is arranged inside the subsection installation cylinder. The receiving mechanism includes a receiving installation seat. A fixed shaft is radially telescopically arranged on the receiving installation seat. The fixed shaft is fixed by cooperating with the fixed holes; the matching mechanism includes a matching shaft radially movably arranged on the moving seat. The matching shaft cooperates with the receiving installation seat to drive the receiving mechanism to move; an inspection mechanism is arranged at the bottom end of the moving seat for inspecting and processing the inner wall of the subsection installation cylinder.

[0005] Further, mounting disks one and two are respectively arranged at both ends inside the short joint mounting cylinder. A first motor is arranged on mounting disk one. A first lead screw is rotatably arranged between mounting disk one and mounting disk two. The first motor is used to drive the first lead screw. A limiting frame is arranged inside the short joint mounting cylinder. The limiting mechanism is slidably engaged with the limiting frame, and the receiving mechanism is slidably engaged with the limiting frame.

[0006] Further, the limiting mechanism includes a first electric cylinder arranged on the moving seat. A slip ring is arranged on the telescopic rod of the first electric cylinder. A connecting rod is rotatably mounted on the slip ring. A moving limiting frame is arranged outside the moving seat. A swing rod is rotatably mounted on the moving limiting frame. One end of the connecting rod is rotatably connected to the swing rod. A limiting seat is arranged at the end of the swing rod facing the inside of the short joint mounting cylinder. The limiting seat is slidably engaged with the limiting frame. The moving limiting frame is slidably engaged with the inside of the receiving mechanism.

[0007] Further, the receiving mechanism includes a first limiting groove opened on the outside of the receiving mounting seat, and a second limiting groove opened on the inside of the receiving mounting seat. The moving limiting frame is slidably engaged with the second limiting groove, and the first limiting groove is slidably engaged with the limiting frame; An electromagnetic wave receiver is arranged at the bottom end of the receiving mounting seat; A plurality of buffer members are arranged in an array on the outside of the receiving mounting seat. The buffer member includes a buffer rod telescopically arranged on the receiving mounting seat. A buffer spring is connected between the buffer rod and the receiving mounting seat. A buffer pad is attached between the end of the buffer spring and the receiving mounting seat.

[0008] Further, a mating port is opened inside the receiving mounting seat. The mating mechanism is mated with the mating port for fixation; A push rack is telescopically arranged on the receiving mounting seat. A return spring is connected between one end of the push rack and the receiving mounting seat. A fixing groove is arranged at the other end of the push rack. A tooth groove is opened on the fixed shaft. An intermediate gear is rotatably arranged between the fixed shaft and the push rack. The two sides of the intermediate gear are respectively meshed with the push rack and the fixed shaft.

[0009] Further, a clamping seat is telescopically arranged on the receiving mounting seat. A first spring is connected between the clamping seat and the receiving mounting seat. Lifting wheels are arranged on both sides of the clamping seat. The clamping seat is mated with the fixing groove on the push rack to fix the push rack. The push rack is controlled to be pushed through the mating mechanism.

[0010] Further, the mating mechanism includes a mating mounting seat arranged on the moving seat. A toothed ring is rotatably mounted on the mating mounting seat. A second motor is arranged on the mating mounting seat. A second gear is arranged on the output shaft of the second motor. The second gear is meshed with the toothed ring. A second lead screw is rotatably mounted on the mating mounting seat. A connecting gear is arranged at one end of the second lead screw. The connecting gear is meshed with the toothed ring. One end of the mating shaft forms a screw pair with the second lead screw. A push plate is arranged at the other end of the mating shaft. The push plate is used to push the push rack. A lifting rod is arranged on the push plate. The lifting rod is used to push the lifting wheel so that the clamping seat disengages from the fixing groove. The mating shaft is mated with the mating port for fixation.

[0011] Further, the inspection mechanism includes a third motor disposed on the moving seat. A third gear is provided on the output shaft of the third motor. An azimuth gear disk is rotatably mounted on the moving seat. The azimuth gear disk meshes with the third gear. An ultrasonic detector is provided on the azimuth gear disk for inspecting the inner wall of the short joint mounting cylinder.

[0012] The beneficial effects of the present invention compared with the prior art are as follows: (1) At the target position, the fixed shaft cooperates with the fixed hole to fix the receiving mounting seat, and the buffer rod contacts the inner wall of the short joint mounting cylinder, which can reduce vibration; (2) The present invention can adjust the position of the receiving mounting seat, that is, adjust the distance for receiving electromagnetic wave signals; (3) After the receiving mounting seat is fixed, the moving seat can be moved independently to inspect the inside of the short joint mounting cylinder at different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the sectional structure of the short joint mounting cylinder of the present invention.

[0015] Figure 3 It is a schematic diagram of the internal structure of the short joint mounting cylinder of the present invention.

[0016] Figure 4 It is a schematic diagram of the structure of the receiving mounting seat of the present invention.

[0017] Figure 5 It is a schematic diagram of the structure of the moving seat of the present invention.

[0018] Figure 6 It is a schematic diagram of the structure of the limiting mechanism of the present invention.

[0019] Figure 7 It is a schematic diagram of the structure of the cooperating mechanism of the present invention.

[0020] Figure 8 It is a schematic diagram of a partial structure of the cooperating mechanism of the present invention.

[0021] Figure 9 It is a schematic diagram of the sectional structure of the receiving mounting seat of the present invention.

[0022] Figure 10 It is a schematic diagram of a partial structure of the receiving mechanism of the present invention.

[0023] Figure 11 For the present invention Figure 10 Schematic diagram of the structure at the A mark in

[0024] Figure 12 It is a schematic diagram of the structure of the inspection mechanism of the present invention.

[0025] Reference numerals: 1 - measurement - while - drilling sub; 2 - sub installation cylinder; 201 - fixing hole; 202 - limiting frame; 3 - downhole motor; 4 - rotary steering tool; 5 - drill bit; 6 - motor 1; 7 - lead screw 1; 8 - mounting plate 1; 9 - mounting plate 2; 10 - receiving mounting seat; 1001 - first limiting groove; 1002 - second limiting groove; 1003 - mating port; 11 - moving seat; 12 - electromagnetic wave receiver; 13 - mating mounting seat; 14 - moving limiting frame; 15 - electric cylinder 1; 16 - slip ring; 17 - connecting rod; 18 - swing rod; 19 - limiting seat; 20 - gear ring; 21 - motor 2; 22 - gear 2; 23 - mating shaft; 24 - lead screw 2; 25 - connecting gear; 26 - push plate; 27 - lifting rod; 28 - fixed shaft; 29 - intermediate gear; 30 - pushing rack; 31 - buffer rod; 32 - buffer spring; 33 - return spring; 34 - clamping seat; 35 - lifting wheel; 36 - spring 1; 37 - azimuth gear disk; 38 - ultrasonic detector; 39 - motor 3; 40 - gear 3. Detailed implementation mode

[0026] Example: As Figures 1 to 12 shown, a downhole electromagnetic wave signal receiving sub is sequentially connected with a measurement - while - drilling sub 1, a sub installation cylinder 2, a downhole motor 3, a rotary steering tool 4, and a drill bit 5 from left to right. Fixing holes 201 are arranged in an array on the inner side of the sub installation cylinder 2. A moving mechanism is arranged inside the sub installation cylinder 2. The moving mechanism includes a lead screw 1 rotatably installed inside the sub installation cylinder 2 and a moving seat 11 that forms a screw pair with the lead screw 1. Limiting mechanisms are respectively arranged at the upper and lower ends of the moving seat 11. A mating mechanism is arranged on the moving seat 11, and a receiving mechanism is arranged inside the sub installation cylinder 2. The receiving mechanism includes a receiving mounting seat 10. A fixed shaft 28 is radially and telescopically arranged on the receiving mounting seat 10. The fixed shaft 28 is fixed by cooperating with the fixing hole 201. The mating mechanism includes a mating shaft 23 that is radially movable on the moving seat 11. The mating shaft 23 cooperates with the receiving mounting seat 10 to drive the receiving mechanism to move. An inspection mechanism is arranged at the bottom end of the moving seat 11 for inspecting and processing the inner wall of the sub installation cylinder 2.

[0027] At both ends inside the short joint installation cylinder 2, there are respectively an installation disk one 8 and an installation disk two 9. A motor one 6 is arranged on the installation disk one 8. A lead screw one 7 is rotatably arranged between the installation disk one 8 and the installation disk two 9. The motor one 6 is used to drive the lead screw one 7. A limit frame 202 is arranged inside the short joint installation cylinder 2. The limit mechanism is slidably matched with the limit frame 202, and the receiving mechanism is slidably matched with the limit frame 202. The limit mechanism includes an electric cylinder one 15 arranged on the moving seat 11. A slip ring 16 is arranged on the telescopic rod of the electric cylinder one 15. A connecting rod 17 is rotatably installed on the slip ring 16. A moving limit frame 14 is arranged outside the moving seat 11. A swing rod 18 is rotatably installed on the moving limit frame 14. One end of the connecting rod 17 is rotatably connected to the swing rod 18. A limit seat 19 is arranged at the end of the swing rod 18 facing the inside of the short joint installation cylinder 2. The limit seat 19 is slidably matched with the limit frame 202. The moving limit frame 14 is slidably matched with the inside of the receiving mechanism.

[0028] The receiving mechanism includes a limit groove one 1001 opened on the outside of the receiving installation seat 10 and a limit groove two 1002 opened on the inside of the receiving installation seat 10. The moving limit frame 14 is slidably matched with the limit groove two 1002, and the limit groove one 1001 is slidably matched with the limit frame 202. An electromagnetic wave receiver 12 is arranged at the bottom end of the receiving installation seat 10. Buffer members are arranged in an array on the outside of the receiving installation seat 10. The buffer members include buffer rods 31 telescopically arranged on the receiving installation seat 10. A buffer spring 32 is connected between the buffer rod 31 and the receiving installation seat 10. A buffer pad is attached between the end of the buffer spring 32 and the receiving installation seat 10. A fitting port 1003 is opened on the inside of the receiving installation seat 10. The fitting mechanism is fitted with the fitting port 1003 for fixation. A push rack 30 is telescopically arranged on the receiving installation seat 10. A return spring 33 is connected between one end of the push rack 30 and the receiving installation seat 10. A fixing groove is arranged at the other end of the push rack 30. A tooth groove is opened on the fixed shaft 28. An intermediate gear 29 is rotatably arranged between the fixed shaft 28 and the push rack 30. The two sides of the intermediate gear 29 are respectively meshed with the push rack 30 and the fixed shaft 28. A clamping seat 34 is telescopically arranged on the receiving installation seat 10. A spring one 36 is connected between the clamping seat 34 and the receiving installation seat 10. And lifting wheels 35 are arranged on both sides of the clamping seat 34. The clamping seat 34 is fitted with the fixing groove on the push rack 30 to fix the push rack 30. The push rack 30 is pushed and controlled through the fitting mechanism.

[0029] The matching mechanism includes a matching mounting seat 13 arranged on the moving seat 11. A gear ring 20 is rotatably mounted on the matching mounting seat 13, and a second motor 21 is arranged on the matching mounting seat 13. A second gear 22 is arranged on the output shaft of the second motor 21. The second gear 22 meshes with the gear ring 20. A second lead screw 24 is rotatably mounted on the matching mounting seat 13. A connecting gear 25 is arranged at one end of the second lead screw 24. The connecting gear 25 meshes with the gear ring 20. One end of the matching shaft 23 forms a screw pair with the second lead screw 24. A push plate 26 is arranged at the other end of the matching shaft 23. The push plate 26 is used to push the push rack 30. A lifting rod 27 is arranged on the push plate 26. The lifting rod 27 is used to push the lifting wheel 35 so that the clamping seat 34 disengages from the fixing groove. The matching shaft 23 cooperates with the matching port 1003 for fixation; the inspection mechanism includes a third motor 39 arranged on the moving seat 11. A third gear 40 is arranged on the output shaft of the third motor 39. An azimuth gear disk 37 is rotatably mounted on the moving seat 11. The azimuth gear disk 37 meshes with the third gear 40. An ultrasonic detector 38 is arranged on the azimuth gear disk 37 for inspecting the inner wall of the short joint mounting cylinder 2.

[0030] Operation principle: In the short joint mounting cylinder 2, the position of the receiving mounting seat 10 can be adjusted, that is, the distance for receiving the electromagnetic wave signal is adjusted. In different position areas, the receiving position of the electromagnetic wave signal will affect the receiving quality. Generally, the closer the distance, the higher the receiving quality. However, too close a distance will also cause signal reception interference. Therefore, in this embodiment, according to the actual situation, the receiving position of the electromagnetic wave signal can be adjusted in real time; specifically, by the operation of the first motor 6, the first lead screw 7 rotates, so that the moving seat 11 moves. When the moving seat 11 moves, the limit seat 19 is slidably matched with the limit frame 202, that is, the moving limit is realized. By the operation of the second motor 21, the gear ring 20 rotates, and then the second lead screw 24 rotates to drive the matching shaft 23 to move. When the matching shaft 23 moves, the push plate 26 pushes the push rack 30, and the lifting rod 27 first pushes the lifting wheel 35, so that the clamping seat 34 releases the fixation of the push rack 30. Under the transmission of the intermediate gear 29, the fixed shaft 28 moves. The fixed shaft 28 cooperates with the fixing hole 201 to fix the receiving mounting seat 10. The fixed shaft 28 extends and retracts inward to release the cooperation with the fixing hole 201, and then the matching shaft 23 cooperates with the matching port 1003 at the same time to fix the receiving mounting seat 10; when the moving seat 11 moves, it can drive the receiving mounting seat 10 to move, that is, adjust the position.

[0031] At the target position, the fixed shaft 28 is fitted with the fixed hole 201 to fix the receiving mounting seat 10. The buffer rod 31 contacts the inner wall of the short joint mounting cylinder 2 to reduce vibration. After the receiving mounting seat 10 is fixed, the moving seat 11 can move independently to check the inside of the short joint mounting cylinder 2 at different positions. When the moving seat 11 moves independently and passes through the receiving mounting seat 10, the telescoping of the two limiting mechanisms can be controlled separately. That is, the electric cylinder 15 controls the movement of the slip ring 16. Under the connection of the connecting rod 17, the swing rod 18 deflects. For example, when passing through the receiving mounting seat 10 from top to bottom, the moving limit frame 14 is in sliding fit with the second limiting groove 1002 to play a limiting role. The upper limiting seat 19 is disengaged from the limiting frame 202. When the lower limiting seat 19 passes through the receiving mounting seat 10, it is in sliding fit with the limiting frame 202 to ensure that the moving seat 11 can be limited during the entire movement process for stable movement. Further, by the operation of the motor 39, the azimuth gear disk 37 rotates, and the inner wall of the short joint mounting cylinder 2 can be inspected by the ultrasonic detector 38, that is, to check whether there is deformation or other conditions for timely feedback and repair.

Claims

1. A downhole electromagnetic wave signal receiving sub, comprising a sub mounting cylinder (2), characterized in that: Inside the short joint installation cylinder (2), fixing holes (201) are arranged in an array. A moving mechanism is arranged inside the short joint installation cylinder (2). The moving mechanism includes a first lead screw (7) rotatably installed inside the short joint installation cylinder (2), and a moving seat (11) that forms a screw pair with the first lead screw (7). Limiting mechanisms are respectively arranged at the upper and lower ends of the moving seat (11). A matching mechanism is arranged on the moving seat (11), and a receiving mechanism is arranged inside the short joint installation cylinder (2). The receiving mechanism includes a receiving mounting seat (10). A fixing shaft (28) is radially telescopically arranged on the receiving mounting seat (10). The fixing shaft (28) cooperates with the fixing hole (201) to fix the receiving mounting seat (10). The matching mechanism includes a matching shaft (23) radially movably arranged on the moving seat (11). An inspection mechanism is arranged at the bottom end of the moving seat (11). A limiting frame (202) is arranged on the inner side of the short joint installation cylinder (2). The limiting mechanism includes a moving limiting frame (14) and a limiting seat (19). The limiting seat (19) is slidably matched with the limiting frame (202). The receiving mechanism further includes a first limiting groove (1001) and a second limiting groove (1002) opened on the receiving mounting seat (10). The moving limiting frame (14) is slidably matched with the second limiting groove (1002), and the first limiting groove (1001) is slidably matched with the limiting frame (202). A matching port (1003) is opened inside the receiving mounting seat (10). The matching shaft (23) cooperates with the matching port (1003) for fixation.

2. The downhole electromagnetic wave signal receiving sub-section according to claim 1, characterized in that: Installation disks one (8) and two (9) are respectively arranged at both ends inside the short joint installation cylinder (2). A first motor (6) is arranged on the installation disk one (8). The first lead screw (7) is rotatably arranged between the installation disk one (8) and the installation disk two (9). The first motor (6) is used to drive the first lead screw (7).

3. The downhole electromagnetic wave signal receiving sub-section according to claim 1, characterized in that: The limiting mechanism includes a first electric cylinder (15) arranged on the moving seat (11). A slip ring (16) is arranged on the telescopic rod of the first electric cylinder (15). A connecting rod (17) is rotatably installed on the slip ring (16). The moving limiting frame (14) is arranged outside the moving seat (11), and a swing rod (18) is rotatably installed on the moving seat (11). One end of the connecting rod (17) is rotatably connected to the swing rod (18). The limiting seat (19) is arranged at one end of the swing rod (18) facing the inner side of the short joint installation cylinder (2).

4. The downhole electromagnetic wave signal receiving sub-section according to claim 1, characterized in that: An electromagnetic wave receiver (12) is arranged at the bottom end of the receiving mounting seat (10). Buffer members are arranged in an array on the outside of the receiving mounting seat (10). The buffer members include buffer rods (31) telescopically arranged on the receiving mounting seat (10). A buffer spring (32) is connected between the buffer rod (31) and the receiving mounting seat (10). A buffer pad is attached between the end of the buffer spring (32) and the receiving mounting seat (10).

5. The downhole electromagnetic wave signal receiving sub-joint according to claim 4, characterized in that: A push rack (30) is telescopically arranged on the receiving mount (10). A return spring (33) is connected between one end of the push rack (30) and the receiving mount (10). A fixing groove is arranged at the other end of the push rack (30). Tooth grooves are formed on the fixing shaft (28). An intermediate gear (29) is rotatably arranged between the fixing shaft (28) and the push rack (30). The two sides of the intermediate gear (29) are respectively meshed with the push rack (30) and the fixing shaft (28).

6. The downhole electromagnetic wave signal receiving sub-section according to claim 5, wherein: A clamping seat (34) is telescopically arranged on the receiving mount (10). A first spring (36) is connected between the clamping seat (34) and the receiving mount (10). Lifting wheels (35) are arranged on both sides of the clamping seat (34). The clamping seat (34) is matched with the fixing groove on the push rack (30) to fix the push rack (30). The push rack (30) is pushed and controlled through a matching mechanism.

7. The downhole electromagnetic wave signal receiving sub-joint according to claim 6, characterized in that: The matching mechanism includes a matching mount (13) arranged on the moving seat (11). A toothed ring (20) is rotatably mounted on the matching mount (13). A second motor (21) is arranged on the matching mount (13). A second gear (22) is arranged on the output shaft of the second motor (21). The second gear (22) is meshed with the toothed ring (20). A second lead screw (24) is rotatably mounted on the matching mount (13). A connecting gear (25) is arranged at one end of the second lead screw (24). The connecting gear (25) is meshed with the toothed ring (20). One end of a matching shaft (23) and the second lead screw (24) form a screw pair. A push plate (26) is arranged at the other end of the matching shaft (23). The push plate (26) is used to push the push rack (30). A lifting rod (27) is arranged on the push plate (26). The lifting rod (27) is used to push the lifting wheel (35) so that the clamping seat (34) disengages from the fixing groove.

8. The downhole electromagnetic wave signal receiving sub-section according to claim 1, characterized in that: The inspection mechanism includes a third motor (39) arranged on the moving seat (11). A third gear (40) is arranged on the output shaft of the third motor (39). An azimuth gear disk (37) is rotatably mounted on the moving seat (11). The azimuth gear disk (37) is meshed with the third gear (40). An ultrasonic detector (38) is arranged on the azimuth gear disk (37) and is used to inspect the inner wall of the short joint mounting cylinder (2).

Images