Multifunctional antimagnetic wellhead device

Abstract

The utility model relates to the technical field of cable logging, and discloses a multifunctional antimagnetic wellhead device which comprises a wellhead baffle, an outer circle magnetic conduction pipe barrel and an inner circle magnetic conduction pipe barrel, and further comprises fixed transverse plates, a fixed transverse plate, a fixed transverse plate, a fixed transverse plate, a fixed transverse plate and a fixed transverse plate, wherein the fixed transverse plates are fixedly installed on the inner wall of the outer circle magnetic conduction pipe barrel circumferentially at equal intervals; by rotating the positioning disc, the bottom conical fluted disc can drive multiple sets of bevel gears, the corresponding ball screws can synchronously rotate on the inner side wall of the annular plate, and the movable transverse plate can slide in the fixed transverse plate, penetrate through a through groove in the joint and extend to the outer side of the outer circle magnetic conduction pipe barrel. When the movable transverse plates extend to the well mouth from the outer side of the horn-shaped outer circle magnetic conduction pipe barrel to connect the anti-magnetic well mouth, the connection stability of the outer circle magnetic conduction pipe barrel and the center position of the well mouth can be achieved through the multiple sets of movable transverse plates which are arranged in the circumferential direction; therefore, the logging cable is more stable during paying off.

Description

Technical Field

[0001] This utility model relates to the field of cable logging technology, specifically a multifunctional antimagnetic wellhead device. Background Technology

[0002] During electromagnetic logging, especially in casing wells, residual magnetism on the well casing caused by materials and drilling operations can magnetize the logging cable as it moves or stops within the casing. During operation, the magnetic markers rely on reading these magnetic marks to determine the depth of the logging instrument in the well. If the logging cable is magnetized, these pre-marked magnetic marks will be lost or weakened, causing depth errors or even making it impossible to determine the logging depth. Therefore, it is necessary to perform antimagnetic operation on the logging cable through an antimagnetic wellhead.

[0003] For example, Chinese Patent Publication No. CN201013295Y discloses an oil well logging device, particularly a dual-purpose antimagnetic wellhead device for preventing the logging cable from being magnetized and cleaning viscous mixtures adhering to the cable in electromagnetic logging. It includes at least a magnetic marker fixing frame (5) located at the wellhead, a magnetic marker fixed on the magnetic marker fixing frame (5), the magnetic marker facing the center of the cable, characterized in that: there is a wellhead support (6) on the oil well casing (10), an outer circular magnetic tube (1) is fixed on the wellhead support (6), and an inner circular magnetic tube (2) is located on the inner circumference of the oil well casing (10); a metal circular tube (3) is located inside the inner circular magnetic tube (2).

[0004] The aforementioned cited documents are convenient to use, small in size, lightweight, and fully functional, which improves the efficiency of electromagnetic logging and reduces the cost of oil exploration.

[0005] However, in actual use, when there is an uneven gap between the outer magnetic tube sleeve and the wellhead in the aforementioned oil logging equipment, the original welded bracket at the bottom cannot be connected and positioned with the wellhead. This makes it impossible to fix the antimagnetic wellhead when logging through cables, thus reducing the practicality of the antimagnetic wellhead. Utility Model Content

[0006] The purpose of this invention is to provide a multifunctional antimagnetic wellhead device, which enables the outer circular magnetic tube to be adapted and adjusted according to different sizes of oil wellheads, thus making the antimagnetic wellhead adaptable to a wider range of installations.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a multifunctional antimagnetic wellhead device, comprising a wellhead baffle, an outer circular magnetic conductive tube, an inner circular magnetic conductive tube, and further comprising:

[0008] Fixed horizontal plates are fixedly installed on the inner wall of the outer circular magnetic tube at equal intervals around the circumference. Annular plates are welded to the adjacent ends of multiple sets of fixed horizontal plates. Movable horizontal plates are slidably installed inside the fixed horizontal plates. Ball screws are rotatably installed at equal intervals on the inner wall of the annular plates. The movable horizontal plates and the ball screws are connected by a threaded connection. A bevel gear is fixedly installed at the end of the ball screw away from the movable horizontal plate.

[0009] A positioning disk is rotatably mounted at the top center of the annular plate. The bottom surface of the positioning disk is integrally formed with a bevel gear, which meshes with the outer edges of multiple sets of bevel gears.

[0010] Preferably, a hinge frame is hinged on the outer circumference of the wellhead baffle, brackets are welded to both sides of the outer magnetic tube, a wire through hole is opened on one side of the outer magnetic tube, and threaded grooves are opened between the bottom tube of the outer magnetic tube and the wellhead baffle.

[0011] Preferably, a connecting plate is fixedly installed on the inner wall of the fixed horizontal plate near the annular plate, and a ball bearing is rotatably installed on the connecting plate near the annular plate. The ball screw is fixedly installed in the inner diameter of the ball bearing and extends into the inner wall of the movable horizontal plate.

[0012] Preferably, the end of the ball screw away from the annular plate has a convex structure, and a through groove is provided at the connection between the fixed cross plate and the outer circular magnetic tube.

[0013] Preferably, a protrusion is fixedly installed on one side of the top of the positioning disk, a positioning pin is movably inserted into one side of the top of the protrusion, and a lever is fixedly installed on the outer circumference of the positioning pin.

[0014] Preferably, the annular plate has positioning holes spaced at equal intervals on its top circumference, and a compression spring is fixedly installed on the top of the paddle and one end of the top of the protrusion.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention uses a rotating positioning disc to drive multiple sets of bevel gears on the bottom bevel gear disc, allowing the corresponding ball screws to rotate synchronously on the inner wall of the annular plate. This enables the movable horizontal plate to slide inside the fixed horizontal plate and pass through the through groove at the connection point, extending to the outside of the outer circular magnetic tube. This allows the outer circular magnetic tube to be fitted and connected to the wellhead to be installed. When the movable horizontal plate extends from the outside of the flared outer circular magnetic tube to the wellhead to connect with the antimagnetic wellhead, the multiple sets of circumferentially arranged movable horizontal plates can achieve stable connection between the outer circular magnetic tube and the center position of the wellhead, thus making the logging cable laying process more stable.

[0017] This invention allows the positioning pin to be moved upward by pushing the lever upward, compressing the spring and releasing the positioning pin from the positioning hole below. At this time, the bevel gear plate below the positioning plate can be driven by rotating the protrusion. After the length of the movable horizontal plate is adjusted, the lever can be released, and the positioning pin, with the help of the spring, is re-inserted into the corresponding positioning hole. In this way, after the movable horizontal plate is adjusted, it is connected to the wellhead to be tested and positioned, and can be stably positioned. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the side cross-sectional structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the inner circular magnetic tube in this utility model;

[0021] Figure 4 This is a schematic diagram of the side cross-sectional structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of this utility model.

[0023] In the diagram: 100, wellhead baffle; 200, outer circular magnetic tube; 300, inner circular magnetic tube; 400, fixed horizontal plate; 500, positioning plate; 11, hinge frame; 21, bracket; 22, wire threading port; 23, threaded groove; 41, annular plate; 42, movable horizontal plate; 43, ball screw; 44, bevel gear; 410, positioning socket; 430, connecting plate; 431, ball bearing; 51, bevel gear disc; 52, protrusion; 520, positioning pin; 521, compression spring; 522, lever. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figure 1-5 This utility model provides a technical solution: a multifunctional antimagnetic wellhead device, including a wellhead baffle 100, an outer circular magnetic conductive tube 200, an inner circular magnetic conductive tube 300, and further comprising:

[0026] A fixed horizontal plate 400 is fixedly installed on the inner wall of the outer circular magnetic tube 200 at equal intervals around the circumference. An annular plate 41 is welded to the adjacent ends of multiple fixed horizontal plates 400. A movable horizontal plate 42 is slidably installed inside the fixed horizontal plate 400. A ball screw 43 is rotatably installed at equal intervals on the inner wall of the annular plate 41. The movable horizontal plate 42 and the ball screw 43 are connected by a threaded engagement. A bevel gear 44 is fixedly installed at the end of the ball screw 43 away from the movable horizontal plate 42.

[0027] The positioning disk 500 is rotatably mounted at the top center of the annular plate 41. The bottom surface of the positioning disk 500 is integrally formed with a bevel gear disk 51, which meshes with the outer edges of multiple sets of bevel gears 44.

[0028] The wellhead baffle 100 is hinged to the outer circumference of the wellhead baffle 100. The outer magnetic tube 200 is welded to the two sides of the outside. The outer magnetic tube 200 is provided with a wire through hole 22 on one side of the outside. The bottom tube of the outer magnetic tube 200 and the wellhead baffle 100 are respectively provided with threaded grooves 23. The hinge frame 11 can hinge and fix the wellhead baffle 100 and the cable reel.

[0029] A connecting plate 430 is fixedly installed on the inner wall of the fixed horizontal plate 400 near the annular plate 41. A ball bearing 431 is rotatably installed on the side of the connecting plate 430 near the annular plate 41. A ball screw 43 is fixedly installed in the inner diameter of the ball bearing 431 and extends into the inner wall of the movable horizontal plate 42. The end of the ball screw 43 away from the annular plate 41 has a convex structure. A through groove is opened at the connection between the fixed horizontal plate 400 and the outer circular magnetic tube 200. Multiple sets of bevel gears 44 can be driven by the bevel gear disk 51, so that the corresponding ball screw 43 can rotate synchronously on the inner wall of the annular plate 41. This allows the movable horizontal plate 42 to slide inside the fixed horizontal plate 400 and through the through groove at the connection, extending to the outside of the outer circular magnetic tube 200, thereby adapting and connecting the outer circular magnetic tube 200 with the wellhead to be installed.

[0030] The positioning plate 500 has a protrusion 52 fixedly installed on one side of its top. A positioning pin 520 is movably inserted into one side of the top of the protrusion 52. A lever 522 is fixedly installed on the outer circumference of the positioning pin 520. Positioning holes 410 are evenly spaced on the top circumference of the annular plate 41. A compression spring 521 is fixedly installed on the top of the lever 522 and one end of the top of the protrusion 52. By pushing the lever 522 upward, the positioning pin 520 is moved upward, and the positioning pin 520 is released from the positioning hole 410 below. At this time, the bevel gear 44 can be driven by the bevel gear plate 51. After the length of the movable horizontal plate 42 is adjusted to fit, the lever 522 can be released. With the cooperation of the compression spring 521, the positioning pin 520 is re-inserted into the corresponding positioning hole 410 for positioning. In this way, after the movable horizontal plate 42 is adjusted, it is connected to the wellhead to be measured and positioned, and can be stably positioned.

[0031] In this embodiment, the outer magnetically conductive tube 200 and the inner magnetically conductive tube 300 are assembled by a threaded groove 23. The inner magnetically conductive tube 300 is also assembled with the oil well casing below by threads. The logging cable can be inserted into the inner magnetically conductive tube 300 through the threading port 22. The outer magnetically conductive tube 200, with its unique "trumpet mouth" shape, large diameter, and high magnetic permeability, draws the magnetic poles from the end face of the oil well casing to the trumpet mouth-shaped end face, thereby reducing the magnetic field at the center. In terms of strength, the inner circular magnetic tube 300 is a long cylindrical tube made of a magnetic medium with a very thick wall and high magnetic permeability. Under the action of an external magnetic field, the long cylindrical tube is induced and magnetized, so that the total magnetic field after synthesis is significantly strengthened in the magnetic medium of the long cylindrical tube, while it is significantly weakened in the central area surrounded by the long cylindrical tube, thereby preventing the logging cable from being magnetized. The antimagnetic technology solution for the logging cable inserted in the antimagnetic wellhead is an existing technology solution and will not be described in detail here.

[0032] In this embodiment, by rotating the turntable 500, the bottom bevel gear disk 51 can drive multiple sets of bevel gears 44, so that the corresponding ball screw 43 can rotate synchronously on the inner wall of the annular plate 41, so that the movable horizontal plate 42 can slide inside the fixed horizontal plate 400 and pass through the through groove at the joint, extending to the outside of the outer circular magnetic tube 200, thereby adapting and connecting the outer circular magnetic tube 200 with the wellhead to be installed. When the movable horizontal plate 42 extends from the outside of the trumpet-shaped outer circular magnetic tube 200 to the wellhead to connect with the antimagnetic wellhead, the multiple sets of circumferentially arranged movable horizontal plates 42 can achieve the stability of the connection between the outer circular magnetic tube 200 and the center position of the wellhead, thus making it more stable when laying the logging cable.

[0033] In this embodiment, by moving the lever 522 upward, the lever 522 moves the positioning pin 520 upward, compressing the compression spring 521. The positioning pin 520 is released from the positioning hole 410 below. At this time, by rotating the protrusion 52, the bevel gear disk 51 below the positioning disk 500 can drive the bevel gear 44. After the length of the movable horizontal plate 42 is adjusted, the lever 522 can be released. With the cooperation of the compression spring 521, the positioning pin 520 is re-inserted and positioned into the corresponding positioning hole 410. In this way, after the movable horizontal plate 42 is adjusted, it is connected to the wellhead to be tested and positioned, and it can be stably positioned.

[0034] Working principle: When installing the antimagnetic wellhead device, if the gap between the horn-shaped outer circular magnetic tube 200 and the wellhead to be installed is too large, it cannot be supported by the U-shaped bracket 21;

[0035] The positioning pin 520 can be moved upward by pushing the lever 522 upward, compressing the compression spring 521, and the positioning pin 520 is released from the positioning hole 410 below. At this time, the bevel gear disk 51 below the positioning disk 500 can be driven by rotating the protrusion 52, so that the corresponding ball screw 43 can rotate synchronously on the inner wall of the annular plate 41, so that the movable horizontal plate 42 can slide inside the fixed horizontal plate 400 and pass through the through groove at the joint, extending to the outside of the outer circular magnetic tube 200, thereby adapting and connecting the outer circular magnetic tube 200 with the wellhead to be installed. When the movable horizontal plate 42 extends from the outside of the trumpet-shaped outer circular magnetic tube 200 to the wellhead to connect with the antimagnetic wellhead, the multiple sets of circumferentially arranged movable horizontal plates 42 can achieve the stability of the connection between the outer circular magnetic tube 200 and the center position of the wellhead, thus making it more stable when laying the logging cable.

[0036] Finally, after stopping the rotation of turntable 500, release the lever 522. With the cooperation of the compression spring 521, the positioning pin 520 is re-inserted into the corresponding positioning hole 410 for positioning. After the movable horizontal plate 42 is adjusted, it is connected to the wellhead to be tested and positioned, and can be stably positioned.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional antimagnetic wellhead device, comprising a wellhead baffle (100), an outer circular magnetically conductive tube (200), and an inner circular magnetically conductive tube (300), characterized in that, Also includes: Fixed horizontal plates (400) are fixedly installed on the inner wall of the outer circular magnetic tube (200) at equal intervals around the circumference. Multiple sets of fixed horizontal plates (400) are welded to adjacent ends with annular plates (41). Movable horizontal plates (42) are slidably installed inside the fixed horizontal plates (400). Ball screws (43) are rotatably installed at equal intervals on the inner wall of the annular plates (41). The movable horizontal plates (42) and the ball screws (43) are connected by a threaded connection. A bevel gear (44) is fixedly installed at the end of the ball screws (43) away from the movable horizontal plates (42). The positioning disk (500) is rotatably mounted at the top center of the annular plate (41). The bottom surface of the positioning disk (500) is integrally formed with a bevel gear disk (51), which meshes with the outer edges of multiple sets of bevel gears (44).

2. The multifunctional antimagnetic wellhead device according to claim 1, characterized in that: A hinge frame (11) is hinged to the outer circumference of the wellhead baffle (100). Supports (21) are welded to both sides of the outer magnetic tube (200). A wire through hole (22) is opened on one side of the outer magnetic tube (200). Threaded grooves (23) are opened between the bottom tube of the outer magnetic tube (200) and the wellhead baffle (100).

3. The multifunctional antimagnetic wellhead device according to claim 2, characterized in that: A connecting plate (430) is fixedly installed on the inner wall of the fixed horizontal plate (400) near the annular plate (41). A ball bearing (431) is rotatably installed on the side of the connecting plate (430) near the annular plate (41). The ball screw (43) is fixedly installed in the inner diameter of the ball bearing (431) and extends into the inner wall of the movable horizontal plate (42).

4. A multifunctional antimagnetic wellhead device according to claim 3, characterized in that: The end of the ball screw (43) away from the annular plate (41) has a convex structure, and a through groove is provided at the connection between the fixed horizontal plate (400) and the outer circular magnetic tube (200).

5. A multifunctional antimagnetic wellhead device according to claim 4, characterized in that: A protrusion (52) is fixedly installed on one side of the top of the positioning disk (500), and a positioning pin (520) is movably inserted into one side of the top of the protrusion (52), and a lever (522) is fixedly installed on the outer circumference of the positioning pin (520).

6. A multifunctional antimagnetic wellhead device according to claim 5, characterized in that: The annular plate (41) has positioning holes (410) spaced at equal intervals on its top circumference, and a compression spring (521) is fixedly installed on the top of the paddle (522) and one end of the top of the protrusion (52).

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