Directional drilling radar shielding chamber and use method thereof

Abstract

The present invention relates to the field of borehole radar, and in particular to a directional borehole radar shielding chamber and a method for using the same. The directional borehole radar shielding chamber comprises a main body, a resistor connection part, a radiation surface support part and a transmitter (receiver) installation part. The main body is a semi-cylindrical shell; the resistor connection part is located at the two ends of the main body, and is used to connect the impedance matching resistor; the radiation surface support part is an arc beam structure, on which an arc-shaped card slot is provided, which is used to support and fix the arc-shaped butterfly-shaped radiation surface; the transmitter (receiver) installation part is located in the middle of the main body, and is used to fix the transmitter (receiver). The shielding chamber is an integrated structure, made of a plastic material with a low density, and a layer of conductive metal paint is sprayed on its outer surface. The shielding chamber takes into account both the shielding function and the lightweight performance, and the overall mass distribution is more uniform. The rotational movement speed is more stable during horizontal detection, and the card slot type supporting structure not only ensures the radial support of the arc-shaped butterfly-shaped radiation surface, but also avoids its circumferential shaking.

Description

Technical Field

[0001] The invention relates to the field of borehole radar, and in particular to a directional borehole radar shielding chamber and a use method thereof. Background Art

[0002] Traditional borehole radar can only detect the depth of geological targets and the radial distance from the borehole, but cannot determine the specific location of the target, because both the transmitting antenna and the receiving antenna are omnidirectional. Therefore, directional borehole radar technology has been developed to accurately obtain the location of the target.

[0003] Using directional transmitting and receiving antennas is one of the ways to achieve precise positioning of borehole radar. Directional transmitting antennas and directional receiving antennas are usually installed on a rotating mechanism inside the radar, and the rotation of the mechanism is precisely controllable. When an abnormal reflected electromagnetic wave occurs, the receiving direction of the electromagnetic wave is the direction of the target.

[0004] The shielding chamber is the core component of the directional transmitting antenna and the directional receiving antenna. It contains the transmitter (receiver), the arc-shaped butterfly-shaped radiating surface, and the impedance matching resistor and other components, which are used to shield the electromagnetic wave signal on the back of the arc-shaped butterfly-shaped radiating surface, thereby realizing the directional function of electromagnetic wave signal transmission and reception. In the prior art, the shielding chamber design in the directional drilling radar has the following problems: 1) The shielding chamber is usually a semi-cylindrical metal shell with a large mass. When it is installed on the rotating mechanism inside the radar, the center of mass is not on the rotation axis, resulting in unstable rotation speed during horizontal detection of the radar, which ultimately affects the detection accuracy; 2) The impedance matching resistor is usually connected to the end face of the shielding chamber by welding, which is inconvenient to disassemble and assemble; 3) A columnar filling block is usually arranged inside the shielding chamber to support the arc-shaped butterfly-shaped radiating surface. This support method can only be used for radial support and cannot avoid the circumferential shaking of the radiating surface. Summary of the invention

[0005] The object of the present invention is to provide a directional drilling radar shielding chamber and a method of using the same to solve the above-mentioned prior art problems.

[0006] The technical solution of the present invention is:

[0007] A directional drilling radar shielding chamber, comprising a main body, a resistor connection part, a radiation surface support part, and a transmitter (receiver) installation part;

[0008] The main body is a semi-cylindrical shell, and a groove structure is provided at the bottom thereof for accommodating the wire. The wire can be fixed inside the groove structure by means of a wire clip; the outer contour of the wire clip is consistent with the cross-sectional contour of the groove structure, so that the wire clip can be accommodated in the groove structure.

[0009] The resistor connection part is located at both side ends of the main body part, and is generally in a flat cylindrical shape; a nut receiving groove is provided at the end of the resistor connection part for receiving a nut; a screw hole structure is provided on the upper side of the nut receiving groove; a resistor set screw passes through the screw hole structure to form a threaded connection with the nut; one end of the impedance matching resistor is wound around the head of the resistor set screw and is fixed to the resistor connection part along with the resistor set screw;

[0010] The radiation surface support part is an arc beam structure, located on the opposite side of the semi-cylindrical shell of the main body; the radiation surface support part is symmetrically provided with a clamping groove for fixing the arc-shaped butterfly-shaped radiation surface, and its position and thickness are adapted to the arc-shaped butterfly-shaped radiation surface; the outer curvature of the radiation surface support part is consistent with the inner curvature of the arc-shaped butterfly-shaped radiation surface;

[0011] The transmitter (receiver) installation part is located in the middle of the main body part, and is composed of four symmetrically arranged protruding structures, which are used to fix the transmitter (receiver); the spacing distance of the symmetrically arranged protruding structures is consistent with the thickness of the transmitter (receiver);

[0012] The shielding chamber is an integrated structure, made of a plastic material with a low density, and a layer of conductive metal paint is sprayed on its outer surface, taking into account both shielding function and lightweight performance.

[0013] Furthermore, the end surface of the resistor connection part is also provided with a circular hole for installing and fixing the shielding compartment.

[0014] Furthermore, the head of the resistor set screw is also equipped with a metal gasket to ensure the electrical connection between the impedance matching resistor and the resistor connecting part.

[0015] Furthermore, a through hole is provided at the bottom of the transmitter (receiver) installation part for passing the wire of the transmitter (receiver).

[0016] A method for using the above-mentioned directional drilling radar shielding chamber, the specific steps are as follows:

[0017] S1, passing the wire of the transmitter (receiver) through the through hole, and inserting the transmitter (receiver) into the middle of the protruding structure;

[0018] S2, welding one end of the impedance matching resistor to the inner side of the arc-shaped butterfly-shaped radiating surface, and welding one end of the arc-shaped butterfly-shaped radiating surface to the transmitter (receiver);

[0019] S3, inserting the arc-shaped butterfly-shaped radiation surface into the groove on the radiation surface support part;

[0020] S4, installing the shielding compartment on the radar rotating mechanism through the circular hole;

[0021] S5, placing the nut into the nut receiving groove, placing the metal gasket into the head of the resistance set screw, and passing the resistance set screw through the screw hole structure and screwing it into the nut;

[0022] S6. Wrap the other end of the impedance matching resistor around the resistor fixing screw, and tighten the resistor fixing screw.

[0023] The beneficial effects of the present invention are mainly:

[0024] ① The shielding chamber is made of a plastic material with low density, and a layer of conductive metal paint is sprayed on its outer surface, which takes into account both shielding function and lightweight performance; the radiation surface support part of the shielding chamber is located on the opposite side of the main part, the overall mass distribution is more uniform, and the rotation speed is more stable during horizontal detection, which can further improve the detection effect;

[0025] ② One end of the impedance matching resistor is fixed to the shielding compartment by a screw, and the head of the screw is located on the circumferential surface of the end of the shielding compartment, which is convenient for the installation and removal of the impedance matching resistor;

[0026] ③ A radiation surface support part is set up to support and fix the arc-shaped butterfly-shaped radiation surface. This support method not only ensures radial support, but also avoids circumferential shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the shielding chamber in an embodiment of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the main part in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the resistor connection part in an embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the radiation surface support part and the transmitter (receiver) installation part in an embodiment of the present invention.

[0031] In the figure: 1-main part; 11-groove structure; 12-conducting wire; 13-wire card; 2-resistance connection part; 21-nut receiving groove; 22-nut; 23-screw hole structure; 24-resistance fixing screw; 25-impedance matching resistor; 26-round hole; 27-metal gasket; 3-radiation surface support part; 31-card slot; 32-arc butterfly-shaped radiation surface; 4-transmitter (receiver) installation part; 41-protrusion structure; 42-transmitter (receiver); 43-through hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] This embodiment provides a directional drilling radar shielding chamber, such as Figure 1 As shown, it includes a main body part 1, a resistor connecting part 2, a radiation surface supporting part 3 and a transmitter (receiver) installation part 4.

[0034] like Figure 2 As shown, in this embodiment, the main body 1 is a semi-cylindrical shell, and a groove structure 11 is provided at the bottom thereof for accommodating the wire 12. The wire 12 can be fixed inside the groove structure 11 by cooperating with the wire clip 13; the outer contour of the wire clip 13 is consistent with the cross-sectional contour of the groove structure 11, so that the wire clip 13 is easy to be accommodated in the groove structure 11; it should be pointed out that the number of wire clips 13 can be increased or decreased according to demand.

[0035] In this embodiment, the resistor connection part 2 is located at both ends of the main body part 1. Figure 3 As shown, it is generally in the shape of a flat cylinder, with a nut receiving groove 21 provided at the end for receiving a nut 22; a screw hole structure 23 is provided on the upper side of the nut receiving groove 21; a resistor fixing screw 24 passes through the screw hole structure 23 to form a threaded connection with the nut 22; one end of the impedance matching resistor 25 is wound around the head of the resistor fixing screw 24 and is fixed to the upper circumferential surface of the resistor connecting part 2 with the resistor fixing screw 24; a circular hole 26 is also provided on the end face of the resistor connecting part 2 for installing and fixing the shielding compartment; in addition, a metal gasket 27 is assembled on the head of the resistor fixing screw 24 to ensure the electrical connection between the impedance matching resistor 25 and the resistor connecting part 2.

[0036] like Figure 4 As shown, in this embodiment, the radiation surface supporting part 3 is an arc beam structure, which is located on the opposite side of the semi-cylindrical shell of the main part 1; the radiation surface supporting part 3 is symmetrically provided with a slot 41 for fixing the arc-shaped butterfly-shaped radiation surface 32; the position and thickness of the slot 41 are adapted to the arc-shaped butterfly-shaped radiation surface 32; the outer curvature of the radiation surface supporting part 3 is consistent with the inner curvature of the arc-shaped butterfly-shaped radiation surface 32; it should be pointed out that the number of arc beam structures in the radiation surface supporting part 3 can be increased or decreased according to demand.

[0037] like Figure 4As shown, in this embodiment, the transmitter (receiver) installation part 4 is located in the middle of the main body part 1, and is composed of four symmetrically arranged protrusion structures 41 for fixing the transmitter (receiver) 42; the spacing distance of the symmetrically arranged protrusion structures 41 is consistent with the thickness of the transmitter (receiver) 42; a through hole 43 is provided at the bottom of the transmitter (receiver) installation part 4 for passing the wire 12 of the transmitter (receiver) 42.

[0038] The shielding chamber provided in this embodiment is an integrated structure, which is made of a plastic material with a relatively low density, and a layer of conductive metal paint is sprayed on its outer surface, thereby taking into account both shielding function and lightweight performance.

[0039] This embodiment also provides a method for using the directional drilling radar shielding chamber, and the specific steps are as follows:

[0040] S1, pass the wire 12 of the transmitter (receiver) 42 through the through hole 43, and insert the transmitter (receiver) 42 into the middle of the protruding structure 41;

[0041] S2, welding one end of the impedance matching resistor 25 to the inner side of the arc-shaped butterfly-shaped radiation surface 32, and welding one end of the arc-shaped butterfly-shaped radiation surface 32 to the transmitter (receiver) 42;

[0042] S3, inserting the arc-shaped butterfly-shaped radiation surface 32 into the groove 31 on the radiation surface support part 3;

[0043] S4, installing the shielding chamber on the radar rotating mechanism through the circular hole 26;

[0044] S5, put the nut 22 into the nut receiving groove 21, put the metal gasket 27 into the head of the resistor set screw 24, and pass the resistor set screw 24 through the screw hole structure 23 and screw it into the nut 22;

[0045] S6. Wrap the other end of the impedance matching resistor 25 around the resistor fixing screw 24, and tighten the resistor fixing screw 24.

[0046] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. A directional drilling radar shielding chamber, characterized in that: It comprises a main body part (1), a resistor connection part (2), a radiation surface support part (3), and a transmitter installation part (4); The main body (1) is a semi-cylindrical shell, and a groove structure (11) is provided at the bottom thereof for accommodating a wire (12). The wire (12) can be fixed inside the groove structure (11) by cooperating with a wire clip (13); the outer contour of the wire clip (13) is consistent with the cross-sectional contour of the groove structure (11), so that the wire clip (13) can be easily accommodated in the groove structure (11); The resistor connection part (2) is located at the two side ends of the main body part (1) and is generally in the shape of a flat cylinder; a nut receiving groove (21) is provided at the end of the resistor connection part (2) for receiving a nut (22); a screw hole structure (23) is provided on the upper side of the nut receiving groove (21); a resistor fixing screw (24) passes through the screw hole structure (23) to form a threaded connection with the nut (22); one end of an impedance matching resistor (25) is wound around the head of the resistor fixing screw (24) and is fixed to the resistor connection part (2) along with the resistor fixing screw (24); the other end of the impedance matching resistor (25) is welded to the inner side of the arc-shaped butterfly-shaped radiation surface (32); one end of the arc-shaped butterfly-shaped radiation surface (32) is welded to the transmitter (42); The radiation surface support portion (3) is an arc beam structure, and is located on the opposite side of the semi-cylindrical shell of the main body portion (1); the radiation surface support portion (3) is symmetrically provided with a clamping groove (31) for fixing the arc-shaped butterfly-shaped radiation surface (32), and its position and thickness are adapted to the arc-shaped butterfly-shaped radiation surface (32); The outer curvature of the radiation surface support portion (3) is consistent with the inner curvature of the arc-shaped butterfly-shaped radiation surface (32); The transmitter mounting portion (4) is located in the middle of the main body portion (1), and is composed of four symmetrically arranged protruding structures (41) for fixing the transmitter (42); the spacing distance between the symmetrically arranged protruding structures (41) is consistent with the thickness of the transmitter (42); The shielding chamber is an integrated structure, made of a plastic material with a low density, and a layer of conductive metal paint is sprayed on its outer surface, taking into account both shielding function and lightweight performance.

2. The directional drilling radar shielding chamber according to claim 1, characterized in that: The end surface of the resistor connecting portion (2) is also provided with a circular hole (26) for installing and fixing the shielding compartment.

3. The directional drilling radar shielding chamber according to claim 2, characterized in that: The head of the resistor fixing screw (24) is also equipped with a metal gasket (27) to ensure the electrical connection between the impedance matching resistor (25) and the resistor connecting part (2).

4. The directional drilling radar shielding chamber according to claim 3, characterized in that: A through hole (43) is provided at the bottom of the transmitter mounting portion (4) for passing the wire (12) of the transmitter (42).

5. A method for using a directional drilling radar shielding chamber, using the directional drilling radar shielding chamber as claimed in claim 4, characterized in that: The specific steps are as follows: S1, passing the wire (12) of the transmitter (42) through the through hole (43), and inserting the transmitter (42) into the middle of the protruding structure (41); S2, welding one end of the impedance matching resistor (25) to the inner side of the arc-shaped butterfly-shaped radiation surface (32), and welding one end of the arc-shaped butterfly-shaped radiation surface (32) to the transmitter (42); S3, inserting the arc-shaped butterfly-shaped radiation surface (32) into the groove (31) on the radiation surface support part (3); S4, installing the shielding chamber on the radar rotating mechanism through the circular hole (26); S5, placing the nut (22) into the nut receiving groove (21), placing the metal gasket (27) into the head of the resistance fixing screw (24), and passing the resistance fixing screw (24) through the screw hole structure (23) and screwing it into the nut (22); S6. Wrap the other end of the impedance matching resistor (25) around the resistor fixing screw (24), and tighten the resistor fixing screw (24).

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