Insulated antenna structure of electromagnetic wave measurement-while-drilling system

Abstract

The utility model discloses an insulating antenna structure of an electromagnetic wave measurement-while-drilling system, which comprises an upper joint, one end in the upper joint is in threaded connection with a middle joint through a set screw, a central spindle is sleeved in the middle of the middle joint, one end of the outer surface of the central spindle is sleeved with an insulating sleeve II, and the other end of the outer surface of the central spindle is sleeved with an insulating sleeve III. The outer surface of the mandrel is sleeved with a second insulating pad, and one side of the second insulating pad is sleeved with a first insulating sleeve and a second sealing ring. According to the utility model, a modularized split structure is adopted, the insulation process cost is effectively reduced through the design of the insulation assembly structure, complex surface treatment on a thread joint part and other contact surfaces is avoided, the unique insulation structure not only significantly improves the overall insulation performance, but also realizes convenient disassembly and assembly operation through a simple structural design; the device supports repeated assembly and use, greatly prolongs the life cycle of the device, is convenient for batch production in factories, and is very simple to transport and assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to an insulating antenna technical field, concretely is an insulating antenna structure of electromagnetic wave while drilling measurement system. BACKGROUND

[0002] The insulating antenna is an antenna device that physically isolates the antenna conductor from the surrounding conductive environment through insulating materials. The design purpose is to prevent electromagnetic wave energy from being short-circuited or attenuated by conductive media, thereby ensuring effective transmission of signals, suitable for electromagnetic wave while drilling measurement system.

[0003] At present, the insulating antenna adopts a split structure, which is composed of an upper segment and a lower segment connected by threads. The specific structural features are as follows: the bottom of the upper segment and the top of the lower segment are assembled by precise fitting of internal and external threads, and a stepped shoulder structure is formed at the joint. In order to achieve insulation performance, multi-layer composite insulation technology is used in the thread engagement area and the shoulder contact surface. However, this design can only improve the impact resistance and insulation wear resistance of the antenna in stages, but it has significant limitations: first, the multi-layer coating process is complex, significantly increasing production costs; second, there is a possibility of structural damage to the insulation layer. When any insulation layer at the thread engagement position is damaged, the insulation layer will be completely ineffective, and the insulating antenna cannot be repaired and can only be disposed of as a whole. This design defect seriously restricts the reliability and economy of the product, so an insulating antenna structure that can solve the above problems is needed to improve the effect. SUMMARY

[0004] The utility model aims at providing an insulating antenna structure of electromagnetic wave while drilling measurement system to solve the problems raised in the background technology. To solve the above technical problems, the utility model is realized by the following technical scheme:

[0005] The utility model is an insulating antenna structure of electromagnetic wave while drilling measurement system, which comprises:

[0006] The upper joint is internally screwed with a middle joint at one end by a set screw, and the middle part of the middle joint is sleeved with a mandrel, one end of the outer surface of the mandrel is sleeved with an insulating sleeve two, and the other end of the outer surface of the mandrel is sleeved with an insulating sleeve three, the outer surfaces of the insulating sleeve two and the insulating sleeve three are respectively attached to the inner walls of the upper joint and the middle joint, the outer surface of the mandrel is sleeved with an insulating pad two, and the outer surface of the insulating pad two is attached to the inner wall of the upper joint, one side of the insulating pad two is respectively sleeved with an insulating sleeve one and a sealing ring two, and the outer surfaces of the insulating sleeve one and the sealing ring two are attached to the inner wall of the middle joint, one end of the outer surface of the upper joint is equidistantly sleeved with a sealing ring one, one end of the outer surface of the middle joint is provided with a shell, and the inner wall end of the shell is attached to the outer side of the middle joint at a position of the sealing ring four, the sealing ring four is provided with an insulating pad one, and the inner wall of the insulating pad one is sleeved with the outer surface of the middle joint, and the outer surface of the middle joint is provided with a sealing ring three at one end of the inner wall of the upper joint.

[0007] Further, opposite sides of the inner side of the shell are provided with flat keys, and the flat keys are sleeved and extend into grooves on one side of the outer surface of the middle joint.

[0008] Further, the opposite sides of the inner side of the insulating sleeve two are threaded with positioning screws, which extend into the mandrel, and the outer ends of the positioning screws are threaded with nuts, which abut against the outer surface of the insulating sleeve two.

[0009] Further, opposite sides of the outer surface of the upper joint are provided with threaded holes extending into the middle joint, and the threaded holes are provided with threaded tubes, and the threaded tubes are threaded with set screws.

[0010] Further, the upper end of the set screw is provided with a cross hole.

[0011] Further, the outer surface of the threaded tube is threaded with a threaded ring, which extends into the upper joint, and the outer surface of the threaded ring is equidistantly provided with a rectangular protrusion.

[0012] The utility model has the following beneficial effects:

[0013] The utility model discloses a modular split structure, which effectively reduces the insulation process cost by designing the insulation assembly structure, avoids complex surface treatment of threaded joint parts and other contact surfaces, and has unique insulation structure, which not only significantly improves the overall insulation performance, but also realizes convenient disassembly and assembly operation through simple structure design, supports repeated assembly and use, greatly prolongs the service life of the device, and is convenient for factory batch production, and transportation and assembly are very simple, and specifically, the mandrel and the upper joint are connected through the middle joint, and the insulation performance and mechanical strength of the insulated antenna are ensured through multi-level insulation and positioning of the inner and outer layers, and the threaded cooperation end face process treatment is not needed. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings described in the following are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Figure 1 is a sectional view of the present application;

[0016] Figure 2 is the present application Figure 1 is an enlarged view of a in the middle;

[0017] Figure 3 is a schematic view of the upper joint and the middle joint connection of the present application.

[0018] In the drawings, the component list represented by each reference numeral is as follows:

[0019] 1, upper joint; 2, sealing ring one; 3, insulating sleeve two; 4, mandrel; 5, positioning screw; 6, nut; 7, insulating pad two; 8, insulating sleeve one; 9, sealing ring two; 10, insulating sleeve three; 11, middle joint; 12, sealing ring three; 13, set screw; 131, threaded hole; 132, threaded tube; 133, threaded ring; 14, sealing ring four; 15, flat key; 16, insulating pad one; 17, shell. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the present application will be described clearly and completely in the following by combining with the drawings in the embodiments of the present application, obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will further describe the embodiments of the present application in detail by combining with the drawings.

[0022] Please refer to Figures 1-3 The present application is an electromagnetic wave while drilling measurement system insulating antenna structure, comprising:

[0023] The upper joint 1 is internally screwed with the middle joint 11 at one end by the set screw 13, and the middle part of the middle joint 11 is internally sleeved with the mandrel 4, one end of the outer surface of the mandrel 4 is sleeved with the insulating sleeve two 3, and the other end of the outer surface of the mandrel 4 is sleeved with the insulating sleeve three 10, the outer surfaces of the insulating sleeve two 3 and the insulating sleeve three 10 are respectively attached to the inner walls of the upper joint 1 and the middle joint 11, the outer surface of the mandrel 4 is sleeved with the insulating pad two 7, and the outer surface of the insulating pad two 7 is attached to the inner wall of the upper joint 1, one side of the insulating pad two 7 is respectively sleeved with the insulating sleeve one 8 and the sealing ring two 9, and the outer surfaces of the insulating sleeve one 8 and the sealing ring two 9 are attached to the inner wall of the middle joint 11, one end of the outer surface of the upper joint 1 is equally sleeved with the sealing ring one 2, one end of the outer surface of the middle joint 11 is provided with the shell 17, and the inner wall end of the shell 17 is attached to the outer side of the middle joint 11 at the position of the sealing ring four 14, the insulating pad one 16 is arranged between the sealing ring fours 14, and the inner wall of the insulating pad one 16 is sleeved with the outer surface of the middle joint 11, and the outer surface of the middle joint 11 is attached to one end of the inner wall of the upper joint 1, and the sealing ring three 12 is arranged at the position;

[0024] The shell 17, the middle joint 11 and the upper joint 1 form an antenna structure, according to the law of electromagnetic induction, the changing current will generate a changing magnetic field around the antenna, and the changing magnetic field will excite a changing electric field, so the electric field and the magnetic field excite each other, and the electromagnetic wave is radiated to the space, taking the common dipole antenna as an example, when the alternating current flows in the vibrator of the antenna, the alternating electric field and magnetic field will be generated around the vibrator, and these electromagnetic fields will separate from the vibrator and propagate to a distance in the form of electromagnetic waves, the insulating sleeve one 8, the insulating sleeve two 3 and the insulating sleeve three 10 constitute the insulating structure of the antenna, and the sealing ring one 2, the sealing ring two 9, the sealing ring three 12 and the sealing ring four 14 constitute the sealing structure of the antenna, so as to ensure the insulation and sealing of the antenna.

[0025] Opposite sides of the inner side of the shell 17 are provided with flat keys 15, and the flat keys 15 are sleeved into the grooves extending to one side of the outer surface of the middle joint 11;

[0026] The sleeve fitting between the flat keys 15 and the grooves is used to butt joint the shell 17 and the middle joint 11.

[0027] The opposite sides of the inner side of the insulating sleeve two 3 are screwed with the positioning screws 5, and the positioning screws 5 extend into the mandrel 4, and the outer ends of the positioning screws 5 are screwed with the nuts 6 and abut against the outer surface of the insulating sleeve two 3;

[0028] The positioning screws 5 cooperate with the nuts 6 to butt joint the insulating sleeve three 10 and the mandrel 4.

[0029] Working principle: First, an insulating sleeve 2 3 is connected to one end of the outer surface of the mandrel 4 by using the positioning screw 5 and nut 6. An insulating pad 2 7 is placed on the middle of the outer surface of the mandrel 4. An insulating sleeve 1 8 and a sealing ring 2 9 are placed on the other end of the outer surface of the mandrel 4 in sequence. A sealing ring 3 12 is placed on one end of the outer surface of the center connector 11. At this time, the mandrel 4 and the center connector 11 can be extended into the interior of the upper connector 1. Then, a sealing ring 4 14 is placed on the other end of the outer surface of the center connector 11, and an insulating pad 16 is placed between the sealing rings 4 14. The center connector 11 is then extended into the outer shell 17. Then, by using the fitting between the flat key 15 and the groove, the outer shell 17 is connected to one end of the center connector 11. The other end of the center connector 11 is connected to the upper connector 1 by using the set screw 13.

[0030] This solution adopts a modular split structure, which effectively reduces the cost of insulation process by designing the insulation component structure, avoiding complex surface treatment of threaded joints and other contact surfaces. Its unique insulation structure not only significantly improves the overall insulation performance, but also enables convenient disassembly and assembly through simple structural design, supports multiple repeated assembly and use, greatly extends the life cycle of the device, and is easy to mass-produce in the factory. Its transportation and assembly are also very simple.

[0031] Please see Figures 1-3 As shown, in this embodiment, based on the above embodiment, threaded holes 131 extending into the middle connector 11 are provided on opposite sides of the outer surface of the upper connector 1, and threaded tubes 132 are arranged inside the threaded holes 131, with set screws 13 threadedly connected to the threaded tubes 132.

[0032] The threaded hole 131 receives the threaded tube 132, and the installation and fixation of the middle connector 11 and the upper connector 1 are completed by the locking between the threaded tube 132 and the set screw 13.

[0033] The upper end of the set screw 13 has a cross hole;

[0034] The set screw 13 can be installed or removed using a Phillips screwdriver.

[0035] The outer surface of the threaded pipe 132 is threaded with a threaded ring 133, which extends into the upper connector 1, and the outer surface of the threaded ring 133 is provided with rectangular protrusions at equal intervals.

[0036] The threaded ring 133 is installed and fixed to the threaded tube 132, and the rectangular protrusions can increase the contact friction to facilitate the application of force for disassembly and assembly of the threaded ring 133.

[0037] Working principle: after the above-mentioned middle joint 11 extends to the inside of the upper joint 1, the threaded pipe 132 is placed in the threaded hole 131, and the threaded ring 133 is controlled by the square-shaped protrusion, then the screwing force is applied, the structure of the threaded pipe 132 is fixed, at this time, the set screw 13 is placed in the threaded pipe 132 and is tightened, namely the middle joint 11 and the upper joint 1 are installed and fixed.

[0038] The scheme uses the threaded pipe 132 connected by threads to replace the threaded hole 131 and the set screw 13, when the set screw 13 slips or breaks, the threaded pipe 132 can be directly disassembled and replaced, which is convenient to use and meets the needs.

[0039] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific implementation. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and use the utility model. The utility model is limited by the claims and the whole scope and equivalents.

Claims

1. An insulated antenna structure for an electromagnetic wave measurement-while-drilling system, characterized in that, include: The upper connector (1) has a middle connector (11) threadedly connected to one end of the upper connector (1) by a set screw (13). A mandrel (4) is fitted inside the middle of the middle connector (11). An insulating sleeve (2) is fitted on one end of the outer surface of the mandrel (4), and an insulating sleeve (3) is fitted on the other end of the outer surface of the mandrel (4). The outer surfaces of the insulating sleeves (2) and (3) respectively fit against the inner walls of the upper connector (1) and the middle connector (11). An insulating pad (2) is fitted on the outer surface of the mandrel (4), and the outer surface of the insulating pad (2) fits against the inner wall of the upper connector (1). An insulating pad (2) is fitted on one side of the insulating pad (2). The outer surfaces of the insulating sleeve (8) and the sealing ring (9) are in contact with the inner wall of the middle connector (11). The upper connector (1) is provided with a sealing ring (2) at one end of its outer surface. The middle connector (11) is provided with a shell (17) at one end of its outer surface. The inner wall of the shell (17) is in contact with the outer side of the middle connector (11) and a sealing ring (14) is provided. An insulating pad (16) is provided between the sealing rings (14) and the inner wall of the insulating pad (16) is in contact with the outer surface of the middle connector (11). A sealing ring (12) is provided at one end of the outer surface of the middle connector (11) in contact with the inner wall of the upper connector (1).

2. The insulated antenna structure of the electromagnetic wave drilling measurement system according to claim 1, characterized in that: The inner side of the outer shell (17) is provided with flat keys (15) on opposite sides, and the flat keys (15) are fitted into the groove extending to one side of the outer surface of the middle connector (11).

3. The insulated antenna structure of the electromagnetic wave drilling measurement system according to claim 1, characterized in that: The inner side of the insulating sleeve 2 (3) has a locating screw (5) threaded through on both sides and extends into the spindle (4). The outer end of the locating screw (5) is threaded with a nut (6) and abuts against the outer surface of the insulating sleeve 2 (3).

4. The insulated antenna structure of an electromagnetic wave drilling measurement system according to claim 1, characterized in that: The upper connector (1) has threaded holes (131) extending into the middle connector (11) on opposite sides of its outer surface, and a threaded tube (132) is provided in the threaded hole (131), and a set screw (13) is threadedly connected in the threaded tube (132).

5. The insulated antenna structure of an electromagnetic wave drilling measurement system according to claim 4, characterized in that: The set screw (13) has a cross hole at its upper end.

6. The insulated antenna structure of an electromagnetic wave drilling measurement system according to claim 4, characterized in that: The outer surface of the threaded tube (132) is threaded with a threaded ring (133) that extends into the upper connector (1), and the outer surface of the threaded ring (133) is provided with rectangular protrusions at equal intervals.

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