Protective device for plateau logging instrument

Abstract

The invention discloses a plateau logging instrument protection device, and relates to the technical field of logging instrument protection devices.The plateau logging instrument protection device comprises a protection barrel, two logging instruments are symmetrically and fixedly connected to the inner wall of the protection barrel through supports, two observation openings are symmetrically formed in the side wall of the protection barrel, and protection lenses are fixedly connected to the inner walls of the two observation openings; the balance mechanism comprises two arc-shaped grooves which are symmetrically formed in the side wall of the protection cylinder, the inner walls of the two arc-shaped grooves are both in sealed sliding connection with arc-shaped plates, the inner wall of the protection cylinder is fixedly connected with a concentric-square-shaped box, and the inner wall of the concentric-square-shaped box is symmetrically in sealed sliding connection with two first conductive plates; and the side wall of the first conductive plate is fixedly connected with a cross rod. The pressure intensity between the interior of a drilling well and the interior of the protection barrel can be rapidly balanced, and the situation that the protection barrel is extruded due to the fact that the pressure intensity in the drilling well is too large, the protection barrel is deformed and damaged, and normal monitoring of a logging instrument is affected is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of well logging instrument protection devices, in particular to a plateau well logging instrument protection device. Background Art

[0002] Drilling is a project that uses mechanical equipment to drill the ground into a cylindrical hole of a certain depth. In geological work, the cylindrical circular hole with a small diameter and a large depth drilled into the ground by drilling equipment is also called a borehole. After the drilling is completed, logging instruments will be placed in the borehole for monitoring and observing the environment inside the borehole.

[0003] In order to prevent collisions inside the wellbore, current logging instruments are equipped with a protective shell outside the logging instrument, and then the logging instrument is placed into the wellbore for monitoring using a lifting rope. However, as the depth of the wellbore goes deeper, the internal pressure becomes greater and greater. When the logging instrument reaches a certain depth of the wellbore, if the pressure inside the wellbore is greater than the pressure inside the protective shell, the protective shell may be squeezed and deformed, thereby damaging the logging instrument inside. In addition, due to the setting of the protective shell, mud and oil inside the wellbore may adhere to the protective shell, affecting the measurement accuracy of the logging instrument.

[0004] Based on this, we propose a protective device for plateau logging instruments. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a plateau well logging instrument protection device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A protective device for a plateau well logging instrument comprises a protective tube, the inner wall of which is symmetrically fixedly connected to two well logging instruments via a bracket, and two observation ports are symmetrically provided on the side wall of the protective tube, and protective lenses are fixedly connected to the inner walls of the two observation ports; The balancing mechanism includes two arc-shaped grooves symmetrically opened on the side wall of the protective tube, the inner walls of the two arc-shaped grooves are sealed and slidably connected with arc plates, the inner wall of the protective tube is fixedly connected with a return box, the inner wall of the return box is symmetrically sealed and slidably connected with two first conductive plates, the side wall of the first conductive plate is fixedly connected with a cross bar, the other end of the cross bar passes through the side wall of the return box and is fixedly connected to the arc plate, the side wall of the cross bar is sleeved with a first spring, the two ends of the first spring are respectively fixedly connected to the side wall of the arc plate and the side wall of the return box, and the top of the return box is symmetrically embedded with Two second conductive plates, a cavity is opened in the protective cylinder, the inner wall of the cavity is sealed and slidably connected with a sliding plug, the sliding plug divides the inner wall of the cavity into two parts: a pump air chamber and a pump liquid chamber, the inner wall of the pump air chamber is fixedly connected with a ventilation pipe and a one-way air inlet pipe, the inner wall of the ventilation pipe is installed with a first solenoid valve, the pump air chamber is connected with the inside of the protective cylinder through a one-way air supply pipe, and the inner walls of the one-way air inlet pipe and the one-way air supply pipe are both installed with second solenoid valves, the first solenoid valve, the second solenoid valve, the two first conductive plates, the two second conductive plates and the power supply are electrically connected through wires.

[0007] Preferably, a driving mechanism is installed on the protective cylinder, and the driving mechanism includes a rotating shaft rotatably connected to the top of the protective cylinder, a first groove is opened in the bottom of the protective cylinder, the rotating shaft extends into the first groove and is fixedly connected to the first gear, the side wall of the sliding plug is fixedly connected to a push rod, the other end of the push rod extends to be arranged in the first groove, the lower end of the first gear is eccentrically fixedly connected to a pin shaft, the side wall of the pin shaft is rotatably connected to a connecting rod, the other end of the connecting rod is rotatably connected to the push rod, the upper end of the protective cylinder is fixedly connected to a motor, and the output end of the motor passes through the upper end of the protective cylinder and is fixedly connected to the rotating shaft.

[0008] Preferably, a cleaning mechanism is installed in the observation port, and the cleaning mechanism includes a mounting groove opened on the inner wall of the observation port, the inner wall of the mounting groove is rotatably connected to a first rotating rod, the side wall of the first rotating rod is fixedly connected to a cleaning block, the side wall of the cleaning block is fixedly connected to a cleaning sponge, and the cleaning sponge is arranged to fit the side wall of the protective lens.

[0009] Preferably, the cleaning mechanism also includes two second grooves symmetrically opened on the inner wall of the first groove, the inner walls of the two second grooves are rotatably connected to a second rotating rod, the lower end of the second rotating rod is fixedly connected to the second gear, the first gear is meshed with the second gear, one end of the first rotating rod extends into the protective tube and is fixedly connected to a bevel gear, the upper end of the second rotating rod is fixedly connected to an incomplete bevel gear that cooperates with the bevel gear, the side wall of the first rotating rod is sleeved with a torsion spring, and the two ends of the torsion spring are respectively fixedly connected to the inner wall of the protective tube and the side wall of the bevel gear.

[0010] Preferably, a liquid supply mechanism is installed in the protective tube, and the liquid supply mechanism includes a liquid storage tank fixedly connected to the bottom of the protective tube, the liquid storage tank is connected to the pump liquid chamber through a one-way liquid inlet pipe, an annular cavity is opened in the side wall of the protective tube, and a plurality of liquid outlet holes are opened on the inner wall of the annular cavity, and the pump liquid chamber is connected to the annular cavity through a one-way liquid supply pipe.

[0011] Preferably, a liquid injection pipe is fixedly connected to the inner wall of the liquid storage tank, and the other end of the liquid injection pipe is arranged through the side wall of the protective tube.

[0012] Preferably, a stabilizing mechanism is installed on the protective tube, and the stabilizing mechanism includes a plurality of mounting plates fixedly connected to the side walls of the protective tube, wherein the side walls of two mounting plates located on the same side close to each other are rotatably connected to a transmission shaft, and the side walls of the transmission shaft are symmetrically fixedly connected to two mounting rods, and the side walls of the two mounting rods close to each other are rotatably connected to a third rotating rod, and the side walls of the third rotating rod are fixedly connected to a roller.

[0013] Preferably, a brake mechanism is installed on the mounting rod, and the brake mechanism includes a circular cavity opened in the mounting rod, a vertical groove is opened on the inner wall of the circular cavity, a magnetic rod is slidably connected to the inner wall of the vertical groove, one end of the third rotating rod extends into the circular cavity, and the side wall of the third rotating rod located in the circular cavity is opened with a plurality of slots cooperating with the magnetic rod, a second spring is fixedly connected between the magnetic rod and the inner wall of the vertical groove, a first electromagnet is fixedly connected to the inner wall of the vertical groove, the return box is filled with mercury, and the mercury is arranged between two first conductive plates, a first conductive block is embedded in the top of the return box, and a second conductive block is embedded in the bottom of the return box, and the first electromagnet, the first conductive block, the second conductive block and the power supply are electrically connected through wires.

[0014] Preferably, a pressure mechanism is installed on the mounting plate, and the pressure mechanism includes an arc-shaped cavity opened in the mounting plate, one end of the transmission shaft extends into the arc-shaped cavity, and the side wall of the transmission shaft located in the arc-shaped cavity is fixedly connected with an arc-shaped magnetic block, and the arc-shaped magnetic block is slidably connected to the inner wall of the arc-shaped cavity, and a third spring is fixedly connected between the inner wall of the arc-shaped cavity and the arc-shaped magnetic block, and a second electromagnet is fixedly connected to the inner wall of the arc-shaped cavity, and the second electromagnet, the first conductive block, the second conductive block and the power supply are electrically connected through wires.

[0015] Preferably, a warning light is fixedly connected to the upper end of the protective tube, and the first conductive block, the second conductive block, the warning light and the power supply are electrically connected via a wire.

[0016] The present invention has the following beneficial effects: 1. By setting up a balancing mechanism and a driving mechanism, the pressure between the inside of the wellbore and the inside of the protective tube can be quickly balanced to avoid excessive pressure inside the wellbore, which may squeeze the protective tube, causing deformation and damage to the protective tube, thereby affecting the normal monitoring of the logging instrument; 2. By setting up a cleaning mechanism, during the monitoring process, the motor is started to drive the rotating shaft to rotate, and then the first gear is driven to rotate, thereby driving the second gear to rotate, driving the second rotating rod to rotate, and then driving the incomplete bevel gear to rotate. When the incomplete bevel gear rotates to engage with the bevel gear, it will drive the bevel gear to rotate a certain angle, thereby driving the first rotating rod to rotate, driving the cleaning block to rotate, and then driving the cleaning sponge to rotate, wiping the surface of the protective lens, wiping off the mud and oil on the surface of the protective lens, and preventing the mud and oil from blocking the logging instrument, making it unable to effectively monitor the inside of the drilling well; 3. By setting up a liquid supply mechanism, when the first gear rotates, it will drive the pin shaft to rotate eccentrically, and then the pin shaft will drive the push rod to move back and forth through the connecting rod, thereby driving the sliding plug to slide back and forth in a sealed manner. At this time, the cleaning liquid in the liquid storage tank will enter the pump liquid chamber through the one-way liquid inlet pipe, and then the cleaning liquid in the pump liquid chamber will enter the annular cavity through the one-way liquid supply pipe. Finally, the cleaning liquid will flow out through multiple liquid outlets and flow to the surface of the protective lens. With the help of the cleaning sponge, the sludge and oil on the surface of the protective lens will be cleaned, further improving the cleaning effect. 4. By providing a brake mechanism and a pressurizing mechanism, as the protective tube continues to penetrate deeper, when the pressure inside the well becomes too high to maintain balance, the curved plate will be pushed to its limit. At this time, the distance between the two first conductive plates will be closest. As the two first conductive plates approach each other, the space between the two first conductive plates will decrease, and the mercury level inside will rise. When the distance between the two first conductive plates is closest, the mercury just completely immerses the first conductive block and the second conductive block, and then the circuit is connected. The first electromagnet will be energized to generate a magnetic repulsive force, pushing the magnetic rod into the slot, thereby preventing the third rotating rod from rotating and the roller from rotating, thus implementing the brake operation. At this time, the second electromagnet will also be energized to generate a magnetic repulsive force, pushing the curved magnetic block to slide in the arc cavity away from the second electromagnet, exerting pressure on the roller, causing the roller to apply pressure to the inner wall of the well, cooperating with the brake operation, so that the protective tube is suspended and prevents it from continuing to descend, thereby preventing damage to the protective tube and the logging instrument caused by excessive pressure; 5. By setting up a stabilizing mechanism, one end of the lifting rope is fixed to the upper end of the protective tube, and then the protective tube is placed inside the wellbore. Under the action of the third spring, multiple rollers will fit tightly with the inside of the wellbore to support the protective tube, so that the protective tube will not swing during the descent, maintaining its stable descent, which is convenient for the logging instrument to measure stably. Then, the lifting rope is slowly slowed down. Under the action of the gravity of the protective tube, the protective tube will slowly descend in the wellbore, and multiple rollers will rotate to improve the descent stability. During the descent, the logging instrument can monitor the internal situation of the wellbore through the observation port; 6. By setting a warning light, when the protective tube is hovering, the warning light will be powered on and an alarm will sound to remind the staff above the drilling that the pressure at the drilling depth is too high and the protective tube and logging instruments cannot continue to descend for monitoring. It reminds the staff to retract the protective tube in time through the lifting rope, thereby effectively avoiding damage to the protective tube and logging instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a protective device for plateau well logging instruments proposed by the present invention; Figure 2 for Figure 1 Schematic cross-sectional view of the structure; Figure 3 for Figure 1 A schematic cross-sectional view of the middle mounting rod; Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the middle mounting plate; Figure 5 for Figure 2 A schematic diagram of the structure enlargement at point A; Figure 6 for Figure 3 A magnified schematic diagram of the structure at point B in FIG. Figure 7 for Figure 4 Schematic diagram of the enlarged structure at point C in FIG.

[0018] In the figure: 1, protective tube; 2, logging instrument; 3, arc groove; 4, arc plate; 5, return box; 6, first conductive plate; 7, cross bar; 8, first spring; 9, second conductive plate; 10, cavity; 11, slide plug; 111, pump air chamber; 112, pump liquid chamber; 12, vent pipe; 13, first solenoid valve; 14, one-way air inlet pipe; 15, one-way air supply pipe; 16, second solenoid valve; 17, rotating shaft; 18, first groove; 19, first gear; 20, push rod; 21, pin; 22, connecting rod; 23, observation port; 24, protective lens; 25, mounting groove; 26, first rotating rod; 27, cleaning block; 28, cleaning sponge; 29, second groove Slot; 30. Second rotating rod; 31. Bevel gear; 32. Incomplete bevel gear; 33. Torsion spring; 34. Liquid storage tank; 35. One-way liquid inlet pipe; 36. Annular cavity; 37. Liquid outlet; 38. One-way liquid supply pipe; 39. Liquid injection pipe; 40. Mounting plate; 41. Mounting rod; 42. Third rotating rod; 43. Roller; 44. Circular cavity; 45. Vertical slot; 46. Magnetic rod; 47. Card slot; 48. Second spring; 49. First electromagnet; 50. First conductive block; 51. Second conductive block; 52. Motor; 53. Arc cavity; 54. Arc magnetic block; 55. Third spring; 56. Second electromagnet; 57. Transmission shaft; 58. Warning light; 59. Second gear. DETAILED DESCRIPTION

[0019] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Reference Figure 1-7 A plateau logging instrument protection device includes a protective tube 1, the inner wall of which is symmetrically fixedly connected to two logging instruments 2 via a bracket, and two observation ports 23 are symmetrically opened on the side wall of the protective tube 1, and the inner walls of the two observation ports 23 are fixedly connected to protective lenses 24; The balancing mechanism includes two arc-shaped grooves 3 symmetrically opened on the side wall of the protective tube 1, the inner walls of the two arc-shaped grooves 3 are sealed and slidably connected with arc plates 4, the inner wall of the protective tube 1 is fixedly connected with a return box 5, the inner wall of the return box 5 is symmetrically sealed and slidably connected with two first conductive plates 6, the side wall of the first conductive plate 6 is fixedly connected with a cross bar 7, the other end of the cross bar 7 passes through the side wall of the return box 5 and is fixedly connected to the arc plate 4, the side wall of the cross bar 7 is sleeved with a first spring 8, the two ends of the first spring 8 are respectively fixedly connected to the side wall of the arc plate 4 and the side wall of the return box 5, two second conductive plates 9 are symmetrically embedded in the top of the return box 5, a cavity 10 is opened in the protective tube 1, the inner wall of the cavity 10 is sealed and slidably connected with a sliding plug 11, and the sliding plug 11 divides the inner wall of the cavity 10 into a pump air chamber 11 1 and the pump liquid chamber 112. The inner wall of the pump air chamber 111 is fixedly connected with a ventilation pipe 12 and a one-way air inlet pipe 14. The one-way air inlet pipe 14 only allows external air to enter the pump air chamber 111. A first solenoid valve 13 is installed on the inner wall of the ventilation pipe 12. The first solenoid valve 13 is closed when power is turned on and opened when power is turned off. The pump air chamber 111 is connected to the interior of the protective tube 1 through a one-way air supply pipe 15. The one-way air supply pipe 15 only allows the air in the pump air chamber 111 to enter the interior of the protective tube 1. Second solenoid valves 16 are installed on the inner walls of the one-way air inlet pipe 14 and the one-way air supply pipe 15. The second solenoid valve 16 is opened when power is turned on and closed when power is turned off. The first solenoid valve 13, the second solenoid valve 16, the two first conductive plates 6, the two second conductive plates 9 and the power supply are electrically connected through wires.

[0021] A driving mechanism is installed on the protective cylinder 1, and the driving mechanism includes a rotating shaft 17 rotatably connected to the top of the protective cylinder 1. A first groove 18 is opened at the bottom of the protective cylinder 1. The rotating shaft 17 extends into the first groove 18 and is fixedly connected to the first gear 19. The side wall of the sliding plug 11 is fixedly connected to the push rod 20, and the other end of the push rod 20 extends to be arranged in the first groove 18. The lower end of the first gear 19 is eccentrically fixedly connected to the pin shaft 21, and the side wall of the pin shaft 21 is rotatably connected to the connecting rod 22. The other end of the connecting rod 22 is rotatably connected to the push rod 20. The upper end of the protective cylinder 1 is fixedly connected to the motor 52, and the output end of the motor 52 passes through the upper end of the protective cylinder 1 and is fixedly connected to the rotating shaft 17.

[0022] Furthermore, as the depth of the protective tube 1 decreases, the pressure inside the well will become greater and greater. When the pressure inside the well is greater than the pressure inside the protective tube 1, the arc plate 4 will begin to slide in the arc groove 3 toward the inside of the protective tube 1, thereby driving the cross bar 7 to slide, and driving the two first conductive plates 6 to slide closer to each other. When the two first conductive plates 6 move to contact the second conductive plate 9, the circuit is connected, the first solenoid valve 13 is energized to close, and the second solenoid valve 16 is energized to open. Under the action of the sliding plug 11, the external air will pass through the one-way The air inlet pipe 14 is drawn into the pump air chamber 111, and then the air in the pump air chamber 111 enters the interior of the protective tube 1 through the one-way air supply pipe 15. As the air inside the protective tube 1 increases, the internal pressure increases. When the pressure inside the protective tube 1 is the same as the internal pressure of the drilling well, the arc plate 4 will slide and reset under the action of the first spring 8, thereby timely balancing the pressure between the inside of the protective tube 1 and the inside of the drilling well, avoiding excessive pressure inside the drilling well, squeezing the protective tube 1, causing the protective tube 1 to be deformed and damaged, and thus affecting the normal monitoring of the logging instrument 2.

[0023] A cleaning mechanism is installed in the observation port 23, and the cleaning mechanism includes a mounting groove 25 opened on the inner wall of the observation port 23. The inner wall of the mounting groove 25 is rotatably connected to a first rotating rod 26, and the side wall of the first rotating rod 26 is fixedly connected to a cleaning block 27. The side wall of the cleaning block 27 is fixedly connected to a cleaning sponge 28, and the cleaning sponge 28 is arranged in contact with the side wall of the protective lens 24.

[0024] The cleaning mechanism also includes two second grooves 29 symmetrically opened on the inner wall of the first groove 18, and the inner walls of the two second grooves 29 are rotatably connected to the second rotating rod 30, and the lower end of the second rotating rod 30 is fixedly connected to the second gear 59, the first gear 19 is meshed with the second gear 59, and the first gear 19 is meshed with the two second gears 59. One end of the first rotating rod 26 extends into the protective tube 1 and is fixedly connected to the bevel gear 31, and the upper end of the second rotating rod 30 is fixedly connected to an incomplete bevel gear 32 that cooperates with the bevel gear 31, and the incomplete bevel gear 32 is meshed with the bevel gear 31 on the same side. The side wall of the first rotating rod 26 is provided with a torsion spring 33, and the two ends of the torsion spring 33 are respectively fixedly connected to the inner wall of the protective tube 1 and the side wall of the bevel gear 31.

[0025] Furthermore, during the monitoring process, the motor 52 is started to drive the rotating shaft 17 to rotate, and then the first gear 19 is driven to rotate, thereby driving the second gear 59 to rotate, driving the second rotating rod 30 to rotate, and then driving the incomplete bevel gear 32 to rotate. When the incomplete bevel gear 32 rotates to engage with the bevel gear 31, it will drive the bevel gear 31 to rotate a certain angle, thereby driving the first rotating rod 26 to rotate, driving the cleaning block 27 to rotate, and then driving the cleaning sponge 28 to rotate, wiping the surface of the protective lens 24. When the incomplete bevel gear 32 is disengaged from the bevel gear 31, the first rotating rod 26 will rotate in the opposite direction and reset under the action of the torsion spring 33, so that the cleaning block 27 can drive the cleaning sponge 28 to rotate back and forth, wiping off the sludge and oil on the surface of the protective lens 24, avoiding sludge and oil blocking, making it impossible for the logging instrument 2 to effectively monitor the inside of the drilling well.

[0026] A liquid supply mechanism is installed in the protective tube 1, and the liquid supply mechanism includes a liquid storage tank 34 fixedly connected to the bottom of the protective tube 1. The liquid storage tank 34 is connected to the pump liquid chamber 112 through a one-way liquid inlet pipe 35. The one-way liquid inlet pipe 35 only allows the cleaning liquid in the liquid storage tank 34 to enter the pump liquid chamber 112. An annular cavity 36 is opened in the side wall of the protective tube 1, and a plurality of liquid outlet holes 37 are opened on the inner wall of the annular cavity 36. The pump liquid chamber 112 is connected to the annular cavity 36 through a one-way liquid supply pipe 38. The one-way liquid supply pipe 38 only allows the cleaning liquid in the pump liquid chamber 112 to enter the annular cavity 36.

[0027] Furthermore, when the first gear 19 rotates, it will drive the pin shaft 21 to rotate eccentrically, and then the pin shaft 21 will drive the push rod 20 to move back and forth through the connecting rod 22, thereby driving the slide plug 11 to slide back and forth in a sealed manner. At this time, the cleaning liquid in the liquid storage tank 34 will enter the pump liquid chamber 112 through the one-way liquid inlet pipe 35, and then the cleaning liquid in the pump liquid chamber 112 will enter the annular cavity 36 through the one-way liquid supply pipe 38. Finally, the cleaning liquid will flow out through multiple liquid outlet holes 37 and flow to the surface of the protective lens 24, and cooperate with the cleaning sponge 28 to clean the sludge and oil on the surface of the protective lens 24, thereby further improving the cleaning effect.

[0028] A liquid injection pipe 39 is fixedly connected to the inner wall of the liquid storage tank 34, and the other end of the liquid injection pipe 39 is set through the side wall of the protective tube 1. Cleaning liquid can be injected into the liquid storage tank 34 through the liquid injection pipe 39 to replenish the cleaning liquid.

[0029] A stabilizing mechanism is installed on the protective tube 1, which includes multiple mounting plates 40 fixedly connected to the side walls of the protective tube 1, wherein the side walls of two mounting plates 40 located on the same side close to each other are rotatably connected to a transmission shaft 57, and the side walls of the transmission shaft 57 are symmetrically fixedly connected to two mounting rods 41, and the side walls of the two mounting rods 41 close to each other are rotatably connected to a third rotating rod 42, and the side walls of the third rotating rod 42 are fixedly connected to a roller 43.

[0030] A brake mechanism is installed on the mounting rod 41, and the brake mechanism includes a circular cavity 44 opened in the mounting rod 41, and a vertical groove 45 is opened on the inner wall of the circular cavity 44, and a magnetic rod 46 is slidably connected to the inner wall of the vertical groove 45. One end of the third rotating rod 42 extends into the circular cavity 44 and is arranged. The side wall of the third rotating rod 42 located in the circular cavity 44 is provided with a plurality of slots 47 cooperating with the magnetic rod 46, and a second spring 48 is fixedly connected between the magnetic rod 46 and the inner wall of the vertical groove 45. A first electromagnet 49 is fixedly connected to the inner wall of the vertical groove 45, and the return box 5 is filled with mercury, which is arranged between the two first conductive plates 6. A first conductive block 50 is embedded in the top of the return box 5, and a second conductive block 51 is embedded in the bottom of the return box 5. The first electromagnet 49, the first conductive block 50, the second conductive block 51 and the power supply are electrically connected through wires.

[0031] A pressurizing mechanism is installed on the mounting plate 40, and the pressurizing mechanism includes an arc-shaped cavity 53 opened in the mounting plate 40. One end of the transmission shaft 57 extends into the arc-shaped cavity 53. The side wall of the transmission shaft 57 in the arc-shaped cavity 53 is fixedly connected with an arc-shaped magnetic block 54. The arc-shaped magnetic block 54 is slidably connected to the inner wall of the arc-shaped cavity 53. A third spring 55 is fixedly connected between the inner wall of the arc-shaped cavity 53 and the arc-shaped magnetic block 54. A second electromagnet 56 is fixedly connected to the inner wall of the arc-shaped cavity 53. The second electromagnet 56, the first conductive block 50, the second conductive block 51 and the power supply are electrically connected through wires.

[0032] Furthermore, as the protective tube 1 continues to go deeper, the pressure inside the well becomes too high to maintain balance, and the arc plate 4 will be pushed to the limit. At this time, the distance between the two first conductive plates 6 is the smallest. As the two first conductive plates 6 approach each other, the space between the two first conductive plates 6 will decrease, and the mercury level inside will rise. When the distance between the two first conductive plates 6 is the smallest, the mercury just completely immerses the first conductive block 50 and the second conductive block 51, and the circuit will be connected, and the first electromagnet 49 will be energized to generate magnetic repulsion. The force pushes the magnetic rod 46 into the slot 47, thereby preventing the third rotating rod 42 from rotating and the roller 43 from rotating, thus implementing the braking operation. At this time, the second electromagnet 56 is also energized to generate a magnetic repulsive force, which pushes the arc-shaped magnetic block 54 to slide in the arc-shaped cavity 53 in the direction away from the second electromagnet 56, giving pressure to the roller 43, so that the roller 43 applies pressure to the inner wall of the well, cooperating with the braking operation, so that the protective tube 1 is suspended and prevents it from continuing to descend, thereby avoiding damage to the protective tube 1 and the logging instrument 2 caused by excessive pressure.

[0033] It is worth mentioning that one end of the lifting rope is fixed to the upper end of the protective tube 1, and then the protective tube 1 is placed inside the well, and the multiple rollers 43 will fit tightly with the inside of the well under the action of the third spring 55, supporting the protective tube 1, so that the protective tube 1 will not swing during the descent and maintain its stable descent, which is convenient for the measurement stability of the logging instrument 2. Then the lifting rope is slowly slowed down, and under the action of the gravity of the protective tube 1, the protective tube 1 will slowly descend in the well, and the multiple rollers 43 will rotate to improve the stability of the descent. During the descent, the logging instrument 2 can monitor the internal situation of the well through the observation port 23.

[0034] A warning light 58 is fixedly connected to the upper end of the protective tube 1 , and the first conductive block 50 , the second conductive block 51 , the warning light 58 and the power supply are electrically connected via wires.

[0035] Furthermore, when the protective tube 1 is hovering, the warning light 58 will also be powered on and light up and sound an alarm, reminding the staff above the drilling that the pressure at the drilling depth is too high and the protective tube 1 and the logging instrument 2 cannot continue to descend for monitoring, reminding the staff to retract the protective tube 1 in time through the lifting rope, thereby effectively avoiding damage to the protective tube 1 and the logging instrument 2.

[0036] In the present invention, one end of the lifting rope is fixed to the upper end of the protective tube 1, and then the protective tube 1 is placed inside the well, and the multiple rollers 43 will fit tightly with the inside of the well under the action of the third spring 55, supporting the protective tube 1, so that the protective tube 1 will not swing during the descent and maintain its stable descent, which is convenient for the measurement stability of the logging instrument 2. Then, the lifting rope is slowly slowed down, and under the action of the gravity of the protective tube 1, the protective tube 1 will slowly descend in the well, and the multiple rollers 43 will rotate to improve the stability of the descent. During the descent, the logging instrument 2 can monitor the internal situation of the well through the observation port 23.

[0037] During the monitoring process, the motor 52 is started to drive the rotating shaft 17 to rotate, and then the first gear 19 is driven to rotate, thereby driving the second gear 59 to rotate, driving the second rotating rod 30 to rotate, and then driving the incomplete bevel gear 32 to rotate. When the incomplete bevel gear 32 rotates to engage with the bevel gear 31, it will drive the bevel gear 31 to rotate a certain angle, thereby driving the first rotating rod 26 to rotate, driving the cleaning block 27 to rotate, and then driving the cleaning sponge 28 to rotate, wiping the surface of the protective lens 24. When the incomplete bevel gear 32 is disengaged from the bevel gear 31, the first rotating rod 26 will rotate in the opposite direction under the action of the torsion spring 33 to reset. In this way, the cleaning block 27 can drive the cleaning sponge 28 to rotate back and forth, wiping off the sludge and oil on the surface of the protective lens 24, avoiding sludge and oil blocking, making it impossible for the logging instrument 2 to effectively monitor the inside of the drilling well.

[0038] In addition, when the first gear 19 rotates, it will drive the pin shaft 21 to rotate eccentrically, and then the pin shaft 21 will drive the push rod 20 to move back and forth through the connecting rod 22, thereby driving the slide plug 11 to slide back and forth in a sealed manner. At this time, the cleaning liquid in the liquid storage tank 34 will enter the pump liquid chamber 112 through the one-way liquid inlet pipe 35, and then the cleaning liquid in the pump liquid chamber 112 will enter the annular cavity 36 through the one-way liquid supply pipe 38. Finally, the cleaning liquid will flow out through multiple liquid outlet holes 37 and flow to the surface of the protective lens 24, and cooperate with the cleaning sponge 28 to clean the sludge and oil on the surface of the protective lens 24, thereby further improving the cleaning effect.

[0039] As the depth of the protective tube 1 decreases, the pressure inside the well will become greater and greater. When the pressure inside the well is greater than the pressure inside the protective tube 1, the arc plate 4 will begin to slide in the arc groove 3 toward the inside of the protective tube 1, thereby driving the cross bar 7 to slide, and driving the two first conductive plates 6 to slide closer to each other. When the two first conductive plates 6 move to contact the second conductive plate 9, the circuit is connected, the first solenoid valve 13 is energized to close, and the second solenoid valve 16 is energized to open. Under the action of the sliding plug 11, the external air will pass through the one-way air inlet pipe. 14 is drawn into the pump air chamber 111, and then the air in the pump air chamber 111 enters the interior of the protective tube 1 through the one-way air supply pipe 15. As the air inside the protective tube 1 increases, the internal pressure increases. When the pressure inside the protective tube 1 is the same as the internal pressure of the drilling well, the arc plate 4 slides and resets under the action of the first spring 8, thereby timely balancing the pressure between the inside of the protective tube 1 and the inside of the drilling well, avoiding excessive pressure inside the drilling well, squeezing the protective tube 1, causing deformation and damage to the protective tube 1, and thus affecting the normal monitoring of the logging instrument 2.

[0040] As the protective tube 1 continues to go deeper, the pressure inside the well becomes too high to maintain balance. The curved plate 4 will be pushed to its limit. At this time, the distance between the two first conductive plates 6 will be the smallest. As the two first conductive plates 6 approach each other, the space between the two first conductive plates 6 will decrease, and the mercury level inside will rise. When the distance between the two first conductive plates 6 is the smallest, the mercury just completely immerses the first conductive block 50 and the second conductive block 51. Then the circuit will be connected, and the first electromagnet 49 will be energized to generate magnetic repulsion. The magnetic rod 46 is pushed into the slot 47, thereby preventing the third rotating rod 42 from rotating and the roller 43 from rotating, thus implementing the braking operation. At this time, the second electromagnet 56 is also energized to generate a magnetic repulsive force, pushing the arc-shaped magnetic block 54 to slide in the arc-shaped cavity 53 in the direction away from the second electromagnet 56, giving pressure to the roller 43, so that the roller 43 applies pressure to the inner wall of the well, cooperating with the braking operation, so that the protective tube 1 is suspended and prevented from continuing to descend, thereby avoiding damage to the protective tube 1 and the logging instrument 2 caused by excessive pressure.

[0041] When the protective tube 1 is hovering, the warning light 58 will also be powered on and light up and sound an alarm to remind the staff above the drilling that the pressure at the drilling depth is too high and the protective tube 1 and the logging instrument 2 cannot continue to descend for monitoring. The staff is reminded to retract the protective tube 1 in time through the lifting rope, thereby effectively avoiding damage to the protective tube 1 and the logging instrument 2.

[0042] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A plateau logging instrument protection device, characterized in that: include: A protective tube (1), wherein two well logging instruments (2) are symmetrically fixedly connected to the inner wall of the protective tube (1) via a bracket, and two observation ports (23) are symmetrically opened on the side wall of the protective tube (1), and protective lenses (24) are fixedly connected to the inner walls of the two observation ports (23); A balancing mechanism, the balancing mechanism includes two arc-shaped grooves (3) symmetrically opened on the side wall of the protective tube (1), the inner walls of the two arc-shaped grooves (3) are sealed and slidably connected to the arc plate (4), the inner wall of the protective tube (1) is fixedly connected to the return box (5), the inner wall of the return box (5) is symmetrically sealed and slidably connected to two first conductive plates (6), the side wall of the first conductive plate (6) is fixedly connected to a cross bar (7), the other end of the cross bar (7) passes through the side wall of the return box (5) and is fixedly connected to the arc plate (4), the side wall of the cross bar (7) is sleeved with a first spring (8), the two ends of the first spring (8) are respectively fixedly connected to the side wall of the arc plate (4) and the side wall of the return box (5), two second conductive plates (9) are symmetrically embedded in the top of the return box (5), the protective tube (1) A cavity (10) is provided inside, and the inner wall of the cavity (10) is sealed and slidably connected to a sliding plug (11), and the sliding plug (11) divides the inner wall of the cavity (10) into two parts: a pump air chamber (111) and a pump liquid chamber (112). The inner wall of the pump air chamber (111) is fixedly connected to a vent pipe (12) and a one-way air inlet pipe (14), and a first solenoid valve (13) is installed on the inner wall of the vent pipe (12). The pump air chamber (111) is communicated with the inside of the protective tube (1) through a one-way air supply pipe (15), and a second solenoid valve (16) is installed on the inner wall of the one-way air inlet pipe (14) and the one-way air supply pipe (15). The first solenoid valve (13), the second solenoid valve (16), the two first conductive plates (6), the two second conductive plates (9) and the power supply are electrically connected through wires.

2. The plateau logging instrument protection device according to claim 1, characterized in that: in: The protective tube (1) is provided with a driving mechanism, which includes a rotating shaft (17) rotatably connected to the top of the protective tube (1), a first groove (18) is provided at the bottom of the protective tube (1), the rotating shaft (17) extends into the first groove (18) and is fixedly connected to a first gear (19), a push rod (20) is fixedly connected to the side wall of the sliding plug (11), the other end of the push rod (20) extends into the first groove (18), the lower end of the first gear (19) is eccentrically fixedly connected to a pin shaft (21), the side wall of the pin shaft (21) is rotatably connected to a connecting rod (22), the other end of the connecting rod (22) is rotatably connected to the push rod (20), the upper end of the protective tube (1) is fixedly connected to a motor (52), the output end of the motor (52) passes through the upper end of the protective tube (1) and is fixedly connected to the rotating shaft (17).

3. The plateau logging instrument protection device according to claim 2, characterized in that: in: A cleaning mechanism is installed in the observation port (23), and the cleaning mechanism includes a mounting groove (25) provided on the inner wall of the observation port (23). The inner wall of the mounting groove (25) is rotatably connected to a first rotating rod (26). A cleaning block (27) is fixedly connected to the side wall of the first rotating rod (26). A cleaning sponge (28) is fixedly connected to the side wall of the cleaning block (27). The cleaning sponge (28) is arranged in contact with the side wall of the protective lens (24).

4. A plateau logging instrument protection device according to claim 3, characterized in that: in: The cleaning mechanism further comprises two second grooves (29) symmetrically arranged on the inner wall of the first groove (18), the inner walls of the two second grooves (29) are both rotatably connected to a second rotating rod (30), the lower end of the second rotating rod (30) is fixedly connected to a second gear (59), the first gear (19) is meshedly connected to the second gear (59), one end of the first rotating rod (26) extends into the protective tube (1) and is fixedly connected to a bevel gear (31), the upper end of the second rotating rod (30) is fixedly connected to an incomplete bevel gear (32) that matches the bevel gear (31), the side wall of the first rotating rod (26) is sleeved with a torsion spring (33), and the two ends of the torsion spring (33) are respectively fixedly connected to the inner wall of the protective tube (1) and the side wall of the bevel gear (31).

5. The plateau logging instrument protection device according to claim 4, characterized in that: in: A liquid supply mechanism is installed in the protective tube (1), and the liquid supply mechanism includes a liquid storage tank (34) fixedly connected to the bottom of the protective tube (1). The liquid storage tank (34) is connected to the pump liquid chamber (112) through a one-way liquid inlet pipe (35). An annular cavity (36) is provided in the side wall of the protective tube (1), and a plurality of liquid outlet holes (37) are provided on the inner wall of the annular cavity (36). The pump liquid chamber (112) is connected to the annular cavity (36) through a one-way liquid supply pipe (38).

6. The plateau logging instrument protection device according to claim 5, characterized in that: in: A liquid injection pipe (39) is fixedly connected to the inner wall of the liquid storage box (34), and the other end of the liquid injection pipe (39) is arranged to penetrate the side wall of the protective tube (1).

7. The plateau logging instrument protection device according to claim 1, characterized in that: in: The protective tube (1) is provided with a stabilizing mechanism, which comprises a plurality of mounting plates (40) fixedly connected to the side wall of the protective tube (1), wherein the side walls of two mounting plates (40) located on the same side close to each other are rotatably connected to a transmission shaft (57), the side walls of the transmission shaft (57) are symmetrically fixedly connected to two mounting rods (41), the side walls of the two mounting rods (41) close to each other are rotatably connected to a third rotating rod (42), and the side wall of the third rotating rod (42) is fixedly connected to a roller (43).

8. The plateau logging instrument protection device according to claim 7, characterized in that: in: The mounting rod (41) is provided with a brake mechanism, which includes a circular cavity (44) provided in the mounting rod (41), an inner wall of the circular cavity (44) is provided with a vertical groove (45), and an inner wall of the vertical groove (45) is slidably connected to a magnetic rod (46), one end of the third rotating rod (42) extends into the circular cavity (44) and is provided, and a side wall of the third rotating rod (42) located in the circular cavity (44) is provided with a plurality of slots (47) cooperating with the magnetic rod (46), and the magnetic rod (46) and the inner wall of the vertical groove (45) are ... A second spring (48) is fixedly connected between the walls, a first electromagnet (49) is fixedly connected to the inner wall of the vertical slot (45), the return box (5) is filled with mercury, and the mercury is arranged between the two first conductive plates (6), a first conductive block (50) is embedded in the top of the return box (5), and a second conductive block (51) is embedded in the bottom of the return box (5), and the first electromagnet (49), the first conductive block (50), the second conductive block (51) and the power supply are electrically connected through wires.

9. The plateau logging instrument protection device according to claim 8, characterized in that: in: A pressurizing mechanism is installed on the mounting plate (40), and the pressurizing mechanism includes an arc-shaped cavity (53) opened in the mounting plate (40), one end of the transmission shaft (57) extends into the arc-shaped cavity (53), and the side wall of the transmission shaft (57) located in the arc-shaped cavity (53) is fixedly connected with an arc-shaped magnetic block (54), and the arc-shaped magnetic block (54) is slidably connected to the inner wall of the arc-shaped cavity (53). A third spring (55) is fixedly connected between the inner wall of the arc-shaped cavity (53) and the arc-shaped magnetic block (54), and a second electromagnet (56) is fixedly connected to the inner wall of the arc-shaped cavity (53). The second electromagnet (56), the first conductive block (50), the second conductive block (51) and the power supply are electrically connected via a wire.

10. The plateau logging instrument protection device according to claim 9, characterized in that: in: A warning light (58) is fixedly connected to the upper end of the protective tube (1), and the first conductive block (50), the second conductive block (51), the warning light (58) and the power supply are electrically connected via wires.

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