Machine base for petroleum logging instrument

Abstract

The invention provides a machine base for a petroleum logging instrument, and belongs to the technical field of petroleum logging exploration and development, the machine base comprises a supporting seat, a rotary driving mechanism and a rotary drum are installed on the supporting seat, an upper supporting plate is fixed on the top of the rotary drum, a clamping mechanism is installed on the upper supporting plate, and a worm gear is fixed on the periphery of the rotary drum; the driving mechanism comprises a motor and a worm, one end of the worm is connected with the output end of the motor, the worm is meshed with a worm gear on the periphery of the rotary drum, the problem that in the prior art, when an oil logging instrument is operated, an operator needs to make direct contact with a radioactive logging source is solved, and harm of the radioactive source to the human body is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum well logging exploration and development, in particular to a machine base for a petroleum well logging instrument. Background Art

[0002] In the prior art, in order to understand the downhole conditions of a drilled wellbore, the downhole conditions need to be tested at a certain well depth according to the drilling design. When implementing the test, "nuclear logging" is one of the more commonly used logging methods.

[0003] During nuclear logging, radioactive logging sources need to be extracted from their storage tanks into the logging instrument, and the logging sources need to be put back into the storage tanks after logging. Under existing technical conditions, the picking and placing of logging sources are done manually, and their nuclear radiation poses a certain hazard to operators. In order to reduce the harm of logging sources to the human body, the research and development of a robot automatic loading and unloading radioactive source system has been started in the field of petroleum logging. When using this system to load and unload radioactive sources, the position of the logging instrument must be adjusted first so that its source bin is facing the calibration position of the robot; then the logging instrument is clamped and fixed, and finally the robot uses the exclusive tool designed by the system to load and unload the radioactive source. Usually, the operator lifts the logging instrument to a certain height, then inserts the chuck into the exclusive ring groove on the instrument, and then lowers the instrument, supporting the instrument at the wellhead through the chuck; if the position of the instrument needs to be adjusted, it can only be done by manual rotation; when the chuck is not needed, it is also taken out manually.

[0004] The inventors have found that the above-mentioned prior art has at least the following defects: if the operators fail to cooperate with each other, it may cause an instrument injury accident; when clamping the instrument equipped with a radioactive logging source, the person is close to the radioactive logging source and it takes a long time, and the radiation source exposes the human body to a relatively large amount of radiation. Summary of the invention

[0005] The embodiment of the present application solves the problem in the prior art that an operator needs to directly contact a radioactive logging source when operating a petroleum logging instrument by providing a base for the petroleum logging instrument, thereby effectively reducing the harm of the radioactive source to the human body.

[0006] In order to solve the above technical problems, the present invention adopts the following technical scheme: a machine base for a petroleum logging instrument, including a support base, on which a rotating drive mechanism and a rotating drum are installed. The rotating drum is a hollow tube, and an upper support plate is fixed on the top of the rotating drum. A clamping mechanism is installed on the upper support plate, and a worm gear is fixed on the outer periphery of the rotating drum; the driving mechanism includes a motor and a worm mounted on the support base, one end of the worm is connected to the output end of the motor, and the worm is meshed with the worm gear on the outer periphery of the rotating drum.

[0007] Since the support seat is equipped with a rotary drive mechanism, the rotary drive mechanism cooperates with the drum, and a clamping mechanism is installed above the drum, the instrument can be passed through the drum and the support seat from top to bottom during use, and clamped by the clamping mechanism, and then the drum and the instrument are driven to rotate by the rotary drive mechanism. During the whole process, the operator does not need to directly contact the radioactive logging source, which effectively reduces the harm of the radioactive source to the human body.

[0008] As a further improvement of the above scheme, the support base includes support legs and a lower support plate fixed above the support legs, the lower support plate is provided with holes running through it from top to bottom, and the lower part of the rotating drum is rotatably installed in the holes of the lower support plate; the holes of the lower support plate provide the necessary installation space for the rotating drum, thereby enabling the rotating drum to rotate stably on the support base.

[0009] As a further improvement of the above scheme, the drum includes an upper section, a middle section and a lower section, wherein the outer diameter of the middle section of the drum is larger than the outer diameter of the lower section of the drum and smaller than the outer diameter of the upper section of the drum, and an upper thrust bearing is installed at the bottom of the cross-section of the upper section and the middle section of the drum, and the upper thrust bearing is installed above the lower support plate and aligned with the hole of the lower support plate; through the upper thrust bearing, the drum can be supported and the friction of the drum during rotation can be reduced, thereby improving the stability of the rotation of the drum.

[0010] As a further improvement of the above scheme, the middle section of the rotating drum passes through the lower support plate and a lower thrust bearing is embedded on the outer periphery, and the bottom of the lower thrust bearing is tightened by a locking nut; thereby, the axial fixation of the rotating drum can be ensured to prevent it from shaking or displacement during rotation.

[0011] As a further improvement of the above solution, the lower section of the rotating drum is provided with an external thread, and the locking nut cooperates with the external thread of the lower section of the rotating drum.

[0012] As a further improvement of the above scheme, the clamping mechanism includes a cylinder body fixing seat fixedly mounted on the upper support plate, a hydraulic cylinder is installed in the cylinder body fixing seat, one end of the piston rod of the hydraulic cylinder extends out of the cylinder body fixing seat and is connected to a pressure block, both sides of the pressure block are connected to clamping claws through connecting rods, the rear ends of the two clamping claws are respectively rotatably connected to the two sides of one end of the cylinder body fixing seat, and clamping plates are fixed on the opposite sides of the front ends of the two clamping claws; the piston rod of the hydraulic cylinder extends out to push the pressure block to move, and the connecting rod will simultaneously drive the two clamping claws to move toward the middle, thereby clamping the logging instrument from three directions. Such a setting not only has reliable operation, but also has strong clamping force, and can effectively ensure the stability of the logging instrument during rotation and adjustment.

[0013] As a further improvement of the above solution, both ends of the connecting rod are rotatably connected to the pressure block and the clamping jaw through a pin shaft, and the connection between the connecting rod and the clamping jaw is close to the rear end of the clamping jaw.

[0014] As a further improvement of the above solution, a pressure plate is fixed on the side of the pressure block, and both the pressure plate and the clamping plate have arc surfaces; the arc surfaces of the pressure plate and the clamping plate can better fit the periphery of the instrument, making the clamping structure more stable in clamping the instrument.

[0015] It can be seen from the above technical solutions that the present invention has at least the following technical effects or advantages: 1. Since the support seat is equipped with a rotary drive mechanism, the rotary drive mechanism cooperates with the drum, and a clamping mechanism is installed above the drum, the instrument can be passed through the drum and the support seat from top to bottom during use, and clamped by the clamping mechanism, and then the drum and the instrument are driven to rotate by the rotary drive mechanism. During the whole process, the operator does not need to directly contact the radioactive logging source, which effectively reduces the harm of the radioactive source to the human body.

[0016] 2. The drum is installed on the support seat through the upper thrust bearing and the lower thrust bearing, and is fastened by the locking nut, which can improve the stability of the drum during rotation.

[0017] 3. The clamping block of the clamping mechanism is connected to clamping claws on both sides through connecting rods. When the piston rod of the hydraulic rod is extended, the clamping block moves, and the connecting rod drives the two clamping claws to move toward the middle at the same time, thereby clamping the logging instrument from three directions, which can effectively ensure the stability of the logging instrument during rotation and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A side view of the rotating drive mechanism and the clamping mechanism hidden in the middle; Figure 3 It is a schematic diagram of the structure of the drum; Figure 4 is a structural schematic diagram of the clamping mechanism; Figure 5 A top view of the clamping mechanism.

[0019] Explanation of the reference numerals in the accompanying drawings: 1. rotating drum, 2. upper support plate, 3. clamping mechanism, 4. worm gear, 5. motor, 6. worm, 7. supporting leg, 8. lower support plate, 9. upper thrust bearing, 10. lower thrust bearing, 11. locking nut, 12. cylinder fixing seat, 13. hydraulic cylinder, 14. pressure block, 15. connecting rod, 16. clamping claw, 17. splint, 18. pressure plate. DETAILED DESCRIPTION In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0020] The present invention provides a base for a petroleum logging instrument, such as Figure 1 , Figure 2 As shown, it includes a supporting seat, a rotating driving mechanism and a clamping mechanism.

[0021] The support base includes a support leg 7 and a lower support plate 8 fixed on the support leg 7, and the support base can provide a support foundation for the entire device. In one example, a rotary drive mechanism is installed on the support base and connected to the outer periphery of the drum 1, and the hollow tubular drum 1 can rotate under the drive of the rotary drive mechanism. The clamping mechanism is installed above the drum 1 and is used to clamp the logging instrument so that when the drum 1 rotates, the instrument can rotate synchronously.

[0022] In this embodiment, the lower support plate 8 is provided with holes that penetrate up and down, and the drum 1 is rotatably mounted on the support seat through the holes of the lower support plate 8. Figure 2 , Figure 3 As shown, the drum 1 comprises an upper section, a middle section and a lower section.

[0023] Among them, the outer diameter of the middle section of the drum 1 is larger than the outer diameter of the lower section of the drum 1 and smaller than the outer diameter of the upper section of the drum 1. An upper thrust bearing 9 is installed at the bottom of the cross section of the upper section of the drum 1 and the middle section of the drum 1. The upper thrust bearing 9 is installed above the lower support plate 8 and aligned with the hole of the lower support plate 8, thereby ensuring that the drum has strong stability when rotating. In addition, after the middle section of the drum 1 passes through the lower support plate 8, a lower thrust bearing 10 is also embedded in its outer periphery, and the bottom of the lower thrust bearing 10 is tightened by a locking nut 11. Specifically, the lower section of the drum 1 is provided with an external thread, and the locking nut 11 cooperates with the external thread of the lower section of the drum 1, thereby being able to keep the drum 1 axially fixed on the support seat.

[0024] A worm wheel 4 is fixed to the outer periphery of the drum 1, and the rotation of the drum 1 can be realized by the cooperation of the worm 6 on the outer periphery of the drum 1 and the rotation drive mechanism. Specifically in this embodiment, the rotation drive mechanism includes a motor 5 and a worm 6 mounted on the lower support plate. One end of the worm 6 is connected to the output end of the motor 5, and the worm 6 is meshed with the worm wheel 4 on the outer periphery of the drum 1, so that the worm 6 can drive the worm wheel 4 and the drum 1 to rotate through the drive of the motor 5.

[0025] An upper support plate 2 is fixed on the top of the drum 1 for mounting a clamping mechanism 3 .

[0026] like Figure 4 and Figure 5 As shown, the clamping mechanism 3 includes a cylinder body fixing seat 12 fixedly mounted on the upper support plate 2, and a hydraulic cylinder 13 is installed in the cylinder body fixing seat 12. One end of the piston rod of the hydraulic cylinder 13 is connected to a pressure block 14 after extending out of one end of the cylinder body fixing seat 12. Both sides of the pressure block 14 are connected to clamping jaws 16 through connecting rods 15. Among them, both ends of the connecting rod 15 are rotatably connected to the pressure block 14 and the clamping jaw 16 through pins, and the connection between the connecting rod 15 and the clamping jaw 16 is close to the rear end of the clamping jaw 16. When the piston rod of the hydraulic cylinder 13 is in a retracted state, the angle between the connecting rod 15 and the piston rod is less than 90°. In addition, the rear ends of the two clamping jaws 16 are rotatably connected to the two sides of one end of the cylinder body fixing seat 12 respectively. Clamping plates 17 are fixed on the opposite sides of the front ends of the two clamping jaws 16. Therefore, when the piston rod of the hydraulic cylinder 13 extends, it will push the pressure block 14 to move, and the connecting rod 15 will simultaneously drive the two clamping jaws 16 to move toward the middle, thereby clamping the well logging instrument from three directions.

[0027] like Figure 5 As shown, a pressing plate 18 is also fixed to the side of the pressing block 14. Both the pressing plate 18 and the clamping plate 17 have arc-shaped surfaces, which can better fit the outer periphery of the instrument, so that the clamping structure can clamp the instrument more stably.

[0028] The base for petroleum logging instruments disclosed in the present invention, when in use, the operator first passes the logging instrument through the rotary drum and the support seat from top to bottom, and then controls the piston rod of the hydraulic cylinder 13 to extend so that the clamping mechanism 3 clamps the logging instrument. Next, the motor 5 is started, and the rotation of the rotary drum 1 and the logging instrument is realized through the transmission of the worm 6 and the worm wheel 4, and the orientation of the logging instrument is adjusted. When the logging instrument needs to be lifted or lowered, the operator can release the clamping mechanism 3 and then operate. During the whole process, the operator does not need to directly contact the radioactive logging source, which greatly reduces the harm of nuclear radiation to the human body.

[0029] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in their embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novelties disclosed herein.

Claims

1. A base for a petroleum logging instrument, characterized in that: The invention comprises a support base, on which a rotary drive mechanism and a rotating drum (1) are mounted, the rotating drum (1) being a hollow tube, an upper support plate (2) being fixed on the top of the rotating drum (1), a clamping mechanism (3) being mounted on the upper support plate (2), and a worm gear (4) being fixed on the outer periphery of the rotating drum (1); the drive mechanism comprises a motor (5) and a worm (6) mounted on the support base, one end of the worm gear (6) being connected to the output end of the motor (5), and the worm gear (6) being meshed with the worm gear (4) on the outer periphery of the rotating drum (1).

2. The base for a petroleum logging instrument according to claim 1, characterized in that: The support base comprises a support leg (7) and a lower support plate (8) fixed above the support leg (7); a hole penetrating from top to bottom is provided on the lower support plate (8); and the lower part of the rotating drum (1) is rotatably mounted in the hole of the lower support plate (8).

3. The base for a petroleum logging instrument according to claim 2, characterized in that: The rotating drum (1) comprises an upper section, a middle section and a lower section, wherein the outer diameter of the middle section of the rotating drum (1) is larger than the outer diameter of the lower section of the rotating drum (1) and smaller than the outer diameter of the upper section of the rotating drum (1), and an upper thrust bearing (9) is installed at the bottom of the cross section between the upper section of the rotating drum (1) and the middle section of the rotating drum (1), and the upper thrust bearing (9) is installed above the lower support plate (8) and is aligned with the hole of the lower support plate (8).

4. The base for a petroleum logging instrument according to claim 3, characterized in that: The middle section of the rotating drum (1) penetrates through the lower support plate (8), and a lower thrust bearing (10) is embedded on the outer periphery. The bottom of the lower thrust bearing (10) is tightened by a locking nut (11).

5. The base for a petroleum logging instrument according to claim 4, characterized in that: The lower section of the rotating drum (1) is provided with an external thread, and the locking nut (11) cooperates with the external thread of the lower section of the rotating drum (1).

6. A base for a petroleum logging instrument according to any one of claims 1 to 5, characterized in that: The clamping mechanism (3) comprises a cylinder fixing seat (12) fixedly mounted on the upper support plate, a hydraulic cylinder (13) being mounted in the cylinder fixing seat (12), one end of a piston rod of the hydraulic cylinder (13) extending out of the cylinder fixing seat (12) and connected to a pressure block (14), both sides of the pressure block (14) being connected to clamping jaws (16) via connecting rods (15), rear ends of the two clamping jaws (16) being rotatably connected to both sides of one end of the cylinder fixing seat (12), and opposite sides of the front ends of the two clamping jaws (16) being fixed to clamping plates (17).

7. The base for a petroleum logging instrument according to claim 6, characterized in that: The two ends of the connecting rod (15) are rotatably connected to the pressing block (14) and the clamping claw (16) through a pin shaft, respectively, and the connection between the connecting rod (15) and the clamping claw (16) is close to the rear end of the clamping claw (16).

8. The base for a petroleum logging instrument according to claim 7, characterized in that: A pressing plate (18) is fixed to the side of the pressing block (14), and both the pressing plate (18) and the clamping plate (17) have arc-shaped surfaces.

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