Underground three-component geophone fixing and mounting structure

Abstract

The invention relates to the technical field of underground instrument fixing and mounting structures, in particular to an underground three-component geophone fixing and mounting structure which comprises three geophone bodies and further comprises an electronic short section, a three-component geophone short section and a connector short section which are mutually inserted and fixed to form an integral structure to be mounted in a pressure-resistant shell. The pressure-resistant shell is fixed in the pressure-resistant shell through a fixing nut; grooves are arranged outside the electronic short section and on the outer circle near the end portion of the three-component geophone short section, rubber rings are installed in the grooves, the rubber rings abut against the circumferential face of the inner wall of the pressure-resistant shell, and the rubber rings provide coupling force needed by the whole structure through energy stored by deformation generated in the assembling process. The device is compact in structure, accurate in positioning and convenient to disassemble and assemble, the installation, maintenance and repair difficulty is reduced, and the skill requirement for maintenance personnel is lowered; therefore, the instrument can work in a wider range of borehole diameters, and the applicability of the downhole instrument is improved.

Description

Technical Field

[0001] The invention relates to the technical field of downhole instrument fixed installation structures, and in particular to a downhole three-component geophone fixed installation structure. Background Art

[0002] The information disclosed in the background of the invention is only intended to enhance the understanding of the overall background of the invention and should not be necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] The three-component geophone is a special geophone used in multi-wave exploration. Unlike the single-component conventional geophone, each geophone is equipped with three mutually perpendicular sensors to record the three components of the particle vibration velocity vector, which is used to simultaneously record longitudinal waves, shear waves, and conversion waves.

[0004] The prior art regarding three-component detectors includes the following patents:

[0005] CN2648457Y, a three-component geophone device for a small vertical seismic profile, comprising: a long cylindrical geophone bearing; a geophone arranged in the geophone bearing, the geophone being connected to an external recorder through a cable; an airbag pushing device bearing fixed above the geophone bearing, an airbag pushing device arranged in the airbag pushing device bearing; a lifting device fixed above the airbag pushing device bearing; characterized in that: a pushing device bearing is screwed below the geophone bearing, the pushing device bearing is long, a pushing arm is pivotally connected to one end of the pushing device bearing screwed to the geophone bearing, a pushing arm cable is fixed near the free end of the pushing arm, and the other end of the pushing arm cable passes through a ring arranged above the pushing arm at the lifting end of the geophone device. A mechanical pushing device or an inflatable pushing device is selected according to different well conditions.

[0006] CN214473999U, a three-component geophone device, applied to the technical field of geological exploration, comprising a push assembly and a plurality of geophone units, the geophone unit comprising a three-component geophone body and a mounting tube, an inspection window is provided on the side wall of the mounting tube, a protective cover is provided on the mounting tube, the protective cover is placed in the inspection window and is hinged to the mounting tube, the three-component geophone body is placed in the mounting tube, and the push assembly is connected to the geophone unit located at the top. The invention is used to solve the technical problems of conveniently inspecting the three-component geophone body and improving the maintenance efficiency of the three-component geophone.

[0007] CN216561028U, an electromagnetic three-component geophone in a well, relates to the field of geophone devices, and includes a geophone body and a support rod rotatably connected to the geophone body, the support rod includes a main support rod and a secondary support rod, a cavity is provided in the middle of the main support rod, and the cavity is open at one end away from the geophone body, and a slide groove connected to the cavity is provided on both sides of the main support rod, and one end of the secondary support rod is fixedly connected to two sliding blocks, and the two sliding blocks are respectively slidably connected in the slide groove, and a fixing piece for fixing with the main support rod is provided on the secondary support rod. The present application fixes the secondary support rod by sliding a rod on the main support rod, and adjusts the support length of the main support rod and the secondary support rod, so that the geophone can be installed in different well diameters for detection. The technical problem that the extension distance of the push-to-leave arm is fixed, so the well diameter of the push-to-leave arm is fixed, and there is a defect that the push-to-leave arm is applicable to a single well diameter is solved. Summary of the invention

[0008] In order to solve the above technical problems, the purpose of the present invention is to provide a downhole three-component geophone fixed installation structure, so that the downhole three-component geophone body fixed installation structure is compact, accurately positioned, and easy to disassemble and assemble, thereby improving its applicability downhole.

[0009] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0010] A downhole three-component geophone fixed installation structure includes three geophone bodies, an electronic short section, a three-component geophone short section and a connector short section, which are plugged and fixed to each other to form an integral structure installed in a pressure-resistant shell and fixed in the pressure-resistant shell by a fixing nut;

[0011] Grooves are provided on the outer circle of the electronic short section and the end of the three-component detector short section. Rubber rings are installed in the grooves. The rubber rings are in contact with the circumferential surface of the inner wall of the pressure-resistant shell. The energy stored in the rubber rings through deformation generated during assembly provides the required coupling force for the overall structure.

[0012] Preferably, the outer shape of the three-component detector short section is set to be stepped, the outer circle of one end of the connector short section is provided with an external thread and a directional pin is provided at the rear end of the thread, a step hole is provided inside the pressure-resistant shell, and a keyway is axially provided on the inner wall of the small-diameter inner hole, the step surface of the three-component detector short section abuts against the step surface of the pressure-resistant shell, and the circumferential surface of the directional pin on the connector short section abuts against the side wall of the keyway of the inner hole of the pressure-resistant shell.

[0013] Preferably, the other end of the pressure-resistant casing is fixed and tightened by means of an internal thread of a fixing nut and an external thread at the end of the connector short section.

[0014] Preferably, the directional pin is fixed to the connector short section by circumferential interference fit or thread, and the directional pin axis intersects the connector short section axis perpendicularly. The inner circumferential side wall of the fixing nut is provided with an internal thread.

[0015] Preferably, the electronic short section, the three-component detector short section and the connector short section are connected into an integral structure by circumferential plug-in fitting and then by fixing pins;

[0016] The electronic short section and the connector short section are provided with one or more threaded stepped pin holes on the external circumferential surfaces at the plug-in positions, and the three-component detector short section is provided with one or more pin holes on the external circumferential surfaces at the plug-in positions at both ends. The locking pin passes through the pin holes of the three-component detector short section and the electronic short section to realize the connection between the three-component detector short section, the electronic short section and the connector short section.

[0017] Preferably, the three geophones are installed orthogonally in the mounting holes of the geophone frame, and the geophones are fixed inside the geophone frame with screws. The overall shape of the geophone frame is a stepped cylinder.

[0018] Preferably, the outer circumferential surface of the detector skeleton is provided with a plurality of connection line arrangement grooves, two mutually orthogonal detector mounting holes are arranged at intervals on its circumference, an axial detector mounting hole is arranged at its end, and the detector and the mounting holes on the detector skeleton are matched with a small gap.

[0019] Preferably, the detector frame is provided with a threaded hole in the middle of each detector mounting hole, and the axis of the threaded hole is perpendicular to and intersects with the axis of the detector mounting hole.

[0020] Preferably, a plastic pad is provided between each geophone and the top screw, and the energy stored by the deformation of the plastic pad is used to ensure a good coupling effect between the geophone and the instrument structure during use.

[0021] Beneficial effects: The present invention has a compact structure, accurate positioning, and convenient assembly and disassembly, which reduces the difficulty of installation, maintenance and repair, and reduces the skill requirements for maintenance personnel; and the compact structure greatly reduces the diameter and length of the instrument, so that the instrument can work in a wider range of well diameters, thereby improving the applicability of downhole instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure without the pressure-resistant shell;

[0024] Figure 3 It is a three-dimensional structural diagram of the short section of the three-component detector;

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the short section of the three-component detector;

[0026] The reference numerals in the figure are:

[0027] 1. Electronic short section; 2. Three-component detector short section; 3. Connector short section; 4. Fixing nut; 5. Tightening pin; 6. Groove; 7. Rubber ring; 8. Detector body; 9. Detector frame; 10. Plastic pad; 11. Top screw. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0029] Figures 1 to 4 A downhole three-component geophone fixed installation structure is shown, comprising three geophone bodies 8, an electronic short section 1, a three-component geophone short section 2 and a connector short section 3 which are plugged and fixed to each other to form an integral structure installed in a pressure-resistant housing and fixed in the pressure-resistant housing by a fixing nut 4;

[0030] The outer circumference of the electronic short section 1 and the end of the three-component detector short section 2 are both provided with grooves 6, and a rubber ring 7 is installed in the groove 6. The rubber ring 7 is in contact with the circumferential surface of the inner wall of the pressure-resistant shell. The energy stored by the deformation generated during assembly of the rubber ring 7 provides the required coupling force for the overall structure;

[0031] The appearance of the three-component detector short section 2 is set to be stepped, the outer circle of one end of the connector short section 3 is provided with an external thread and a directional pin is provided at the rear end of the thread, a step hole is provided inside the pressure-resistant shell, and a keyway is axially provided on the inner wall of the small-diameter inner hole, the step surface of the three-component detector short section 2 abuts against the step surface of the pressure-resistant shell, and the circumferential surface of the directional pin on the connector short section 3 abuts against the side wall of the keyway of the inner hole of the pressure-resistant shell, and the other end of the pressure-resistant shell is fixed and pressed by the internal thread of the fixing nut 4 and the external thread at the end of the connector short section 3. This fixed installation structure is compact, accurately positioned, and easy to disassemble and assemble, which reduces the difficulty of installation, maintenance and repair, and reduces the skill requirements for maintenance personnel. In addition, the compact structure greatly reduces the diameter and length of the instrument, allowing the instrument to work in a wider range of well diameters, improving the applicability of downhole instruments.

[0032] In another preferred embodiment, the directional pin is fixed to the connector short section 3 by circumferential interference fit or threading, and the directional pin axis intersects perpendicularly with the axis of the connector short section 3. The inner circumferential side wall of the fixing nut 4 is provided with an internal thread.

[0033] In another preferred embodiment, the electronic short section 1, the three-component detector short section 2 and the connector short section 3 are connected into an integral structure by circumferential plug-in fitting and then by a fixing pin 5;

[0034] The electronic short section 1 and the connector short section 3 (3) are provided with one or more threaded stepped pin holes on the outer circumferential surfaces at the plug-in positions, and the three-component detector short section 2 is provided with one or more pin holes on the outer circumferential surfaces at the plug-in positions at both ends. The fixing pin 5 passes through the pin holes of the three-component detector short section 2 and the electronic short section 1 to realize the connection between the three-component detector short section 2 and the electronic short section 1 and the connector short section 3.

[0035] In another preferred embodiment, the three detectors are installed orthogonally in the mounting holes of the detector frame 9, and the detectors are fixed inside the detector frame 9 by means of a top screw 11. The overall shape of the detector frame 9 is a stepped cylinder.

[0036] In another preferred embodiment, the outer circumferential surface of the detector skeleton 9 is provided with a plurality of connection line arrangement grooves, two mutually orthogonal detector mounting holes are arranged at intervals on its circumference, an axial detector mounting hole is arranged at its end, and the detector and the mounting holes on the detector skeleton are matched with a small gap.

[0037] In another preferred embodiment, the detector frame 9 is provided with a threaded hole in the middle of each detector mounting hole, and the axis of the threaded hole is perpendicular to and intersects with the axis of the detector mounting hole.

[0038] In another preferred embodiment, a plastic pad 10 is provided between each geophone and the top screw 11, and the energy stored by the deformation of the plastic pad 10 is used to ensure a good coupling effect between the geophone and the instrument structure during use. The geophone frame 9 (9) is characterized in that it is processed in one piece with high precision, the relative position relationship of the three mounting holes is accurate, and the position relationship of the three mutually orthogonal geophones is not affected by external factors such as assembly errors, thereby ensuring the position relationship of the three orthogonal geophones.

[0039] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0040] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0041] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other 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 novel features disclosed herein.

Claims

1. A downhole three-component geophone fixed installation structure, comprising three geophone bodies, characterized in that: It also includes an electronic short section, a three-component detector short section and a connector short section which are plugged and fixed to each other to form an integral structure installed in the pressure-resistant shell and fixed in the pressure-resistant shell by a fixing nut; Grooves are provided on the outer circle of the electronic short section and the end of the three-component detector short section. Rubber rings are installed in the grooves. The rubber rings are in contact with the circumferential surface of the inner wall of the pressure-resistant shell. The energy stored in the rubber rings through deformation generated during assembly provides the required coupling force for the overall structure.

2. The underground three-component geophone fixed installation structure according to claim 1 comprises three geophone bodies, characterized in that: The outer shape of the three-component detector short section is set to be stepped, the outer circle of one end of the connector short section is provided with an external thread and a directional pin is provided at the rear end of the thread, a step hole is provided inside the pressure-resistant shell, and a keyway is axially provided through the inner wall of the small-diameter inner hole, the step surface of the three-component detector short section abuts against the step surface of the pressure-resistant shell, and the circumferential surface of the directional pin on the connector short section abuts against the side wall of the keyway of the inner hole of the pressure-resistant shell.

3. The underground three-component geophone fixed installation structure according to claim 2 comprises three geophone bodies, characterized in that: The other end of the pressure-resistant casing is fixed and pressed by means of the internal thread of the fixing nut and the external thread of the end of the connector short section.

4. The underground three-component geophone fixed installation structure according to claim 3 is characterized in that: The directional pin is fixed on the connector short section by circumferential interference fit or thread, and the directional pin axis intersects the connector short section axis perpendicularly. The inner circumferential side wall of the fixing nut is provided with an internal thread.

5. The downhole three-component geophone fixed installation structure according to claim 4 is characterized in that: The electronic short section, the three-component detector short section and the connector short section are matched through circumferential plug-in and then connected into an integral structure by a fixing pin.

6. The underground three-component geophone fixed installation structure according to claim 5, characterized in that: The electronic short section and the connector short section are provided with one or more threaded stepped pin holes on the external circumferential surfaces at the plug-in positions, and the three-component detector short section is provided with one or more pin holes on the external circumferential surfaces at the plug-in positions at both ends. The locking pin passes through the pin holes of the three-component detector short section and the electronic short section to realize the connection between the three-component detector short section, the electronic short section and the connector short section.

7. The downhole three-component geophone fixed installation structure according to claim 6, characterized in that: The three geophones are installed orthogonally in the installation holes of the geophone frame, and the geophones are fixed inside the geophone frame by means of top screws. The overall shape of the geophone frame is a stepped cylindrical shape.

8. The downhole three-component geophone fixed installation structure according to claim 7, characterized in that: The outer circumferential surface of the detector frame is provided with a plurality of connection line arrangement grooves, two mutually orthogonal detector installation holes are arranged at intervals on its circumference, an axial detector installation hole is arranged at its end, and the detector and the installation holes on the detector frame are matched with a small gap.

9. The underground three-component geophone fixed installation structure according to claim 8, characterized in that: The detector frame is provided with a threaded hole in the middle of each detector installation hole, and the axis of the threaded hole is perpendicular to and intersects with the axis of the detector installation hole.

10. The underground three-component geophone fixed installation structure according to claim 9, characterized in that: A plastic pad is arranged between each detector and the top screw, and the energy stored by the deformation of the plastic pad is used to ensure a good coupling effect between the detector and the instrument structure during use.

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