Underground camera probe for ultra-deep hole and drilling television imager

Abstract

The invention relates to the field of deep hole detection equipment, in particular to an underground camera probe for an ultra-deep hole and a drilling television imager, which can be used for deep coal drilling detection and ocean drilling detection. Comprising a foundation underground camera probe and a protective cover, the whole foundation underground camera probe is cylindrical, and a third lens is arranged on the lower portion of the foundation underground camera probe; the protective cover integrally surrounds the basic underground camera probe, and triangular protective sheets capable of being gathered and separated are arranged on the lower portion of the protective cover and can move up and down relative to the basic underground camera probe, so that the triangular protective sheets are separated for detection, and the triangular protective sheets are gathered to protect the basic underground camera probe. And a plurality of groups of detachable lens components are sequentially connected to the lower part of the lens III and are coaxial with the lens III. Impact force brought by gravity can be used for penetrating through blocky mud and gangue accumulated at a certain layer in a drill hole, and the blocky mud and gangue and suspended gangue blocked in the drill hole can be conveniently penetrated through during deep coal drilling detection and ocean drilling detection.

Description

Technical Field

[0001] The invention relates to the field of deep hole detection equipment, and in particular to a downhole camera probe and a borehole television imager for ultra-deep holes, which can be used for deep coal borehole detection and ocean borehole detection. Background Art

[0002] Borehole television imagers mainly include downhole camera probes, ground controllers, transmission cables, winches and gallows, etc. The downhole camera probes are composed of CCD cameras, LED lights, and protective lenses. They can measure the borehole structure in all directions, automatically extract profiles in real time, provide clear and lifelike images, and automatically and accurately calibrate the depth. They can record and image all-round and full-cylindrical videos of the observation hole, and perform in-situ scanning and imaging of different media around the borehole, so as to more clearly understand the properties of each rock layer in the borehole and the integrity of the borehole, for example, the SYKJ-23 borehole television imager.

[0003] At present, borehole television imagers are mainly used for detection of no suspended gangue and clear water in boreholes. When conducting deep hole detection, the possibility of encountering broken zones such as faults and goafs in the borehole is greatly increased. At this time, the blocky mud gangue that falls off the borehole wall often blocks a certain position in the borehole or there is suspended gangue somewhere on the borehole wall. When detecting, the downhole camera probe must pass through the blocky mud gangue blocking the borehole, and may also touch the suspended gangue on the borehole wall, which will cause the mud block to stick to the camera lens of the downhole camera probe, resulting in blurred imaging and inability to continue detection. The downhole camera probe needs to be raised to the ground again to clean the camera lens before continuing detection, which reduces the detection efficiency. Summary of the invention

[0004] In view of the above technical problems, the present invention provides an openable and closable protective cover for the downhole camera probe, so as to facilitate the penetration of the blocky mud and gangue in the borehole and protect the camera lens; at the same time, the present invention provides multiple sets of camera lenses, which can be replaced in time when the camera lenses are worn or stained with mud blocks;

[0005] Specifically, the present invention proposes a downhole camera probe for ultra-deep holes and a drilling television imager, wherein the downhole camera probe for ultra-deep holes comprises a basic downhole camera probe and a protective cover, wherein the basic downhole camera probe is cylindrical as a whole, and a lens three is arranged at the lower part; the protective cover comprises a supporting steel ring, and the supporting steel ring is arranged coaxially with the basic downhole camera probe and is located at the periphery of the basic downhole camera probe; vertical supporting rods are arranged circumferentially on the upper part of the supporting steel ring, and all the supporting rods have the same length and are fixed to the connecting top surface at the top, and the top of the basic downhole camera probe is connected to the connecting top surface by an electric telescopic rod; the basic downhole camera probe is connected to the connecting top surface by a ... The downhole camera probe is circumferentially arranged with horizontally arranged connecting slide bars, the connecting slide bars correspond to the support rods one by one and are slidably connected to the support rods at the end facing away from the basic downhole camera probe; the lower part of the support steel ring is evenly arranged with rotating hinges along the circumference, the lower side of the rotating hinges is connected to the triangular protective sheet, the outer wall of the triangular protective sheet is fixed with a horizontally arranged connecting ring, all the connecting rings are arranged in the same horizontal plane, and a circular tightening spring is arranged in the connecting ring, and when the tightening spring is in a fully tightened state, all the triangular protective sheets can form a closed connected cone to receive the basic downhole camera probe inside it.

[0006] Preferably, a bottom connecting ring 2 is fixedly arranged coaxially at the lower part of the lens 3; a plurality of groups of detachable lens assemblies are connected in sequence coaxially with the lower part of the bottom connecting ring 2, and the detachable lens assemblies have the same structure, including a top connecting ring, a connecting circular tube, a lens and a bottom connecting ring 1 which are coaxially arranged and fixedly connected in sequence, and a lens connecting device is used to connect the detachable lens assemblies and the detachable lens assemblies and the bottom connecting ring 2.

[0007] Preferably, the lens connecting device comprises an upper connecting adhesive, a heating ring, and a lower connecting adhesive, and the heating ring is connected to the power supply device through a circuit.

[0008] Preferably, the detachable lens assembly is in two groups, wherein the upper detachable lens assembly is connected to the bottom connecting ring 2 via a lens connecting device, and its lens is lens 2; the lower detachable lens assembly is connected to the bottom connecting ring 1 of the upper detachable lens assembly via a lens connecting device, and its lens is lens 1.

[0009] Preferably, the top connecting ring, bottom connecting ring one and bottom connecting ring two are all thin circular ring structures, and their inner diameters and outer diameters are the same; the upper connecting glue and the lower connecting glue are also thin circular ring structures when in a connected state, and their inner diameters and outer diameters are the same and are the same as those of the top connecting ring, bottom connecting ring one and bottom connecting ring two; the heating ring is a thin circular ring structure, and its inner diameter is greater than or equal to the inner diameters of the upper connecting glue and the lower connecting glue, and its outer diameter is less than or equal to the inner diameters of the upper connecting glue and the lower connecting glue.

[0010] Preferably, the connecting circular tube is a circular tube with a certain thickness and the height is as small as possible. In this case, the outer diameter of the connecting circular tube is equal to the outer diameters of the top connecting ring and the bottom connecting ring, and the inner diameter of the connecting circular tube is equal to the inner diameters of the top connecting ring and the bottom connecting ring; or the outer diameter of the connecting circular tube is equal to the inner diameters of the top connecting ring and the bottom connecting ring, in this case, the outer rings of the top connecting ring and the bottom connecting ring are connected by a number of circumferentially uniformly and vertically arranged expansion rods.

[0011] Preferably, a filter cover is also provided on the connecting circular tube.

[0012] Preferably, it also includes a detachable lens assembly recovery device, which includes a folding motor and a folding rope arranged on the top surface of the connection, the folding motor is used to fold the folding rope, and the other end of the folding rope is connected to a connecting hole set on the bottom connecting ring.

[0013] The present invention also relates to a drilling television imager, comprising the downhole camera probe mentioned above, a ground controller, and a transmission cable, wherein the ground controller is connected to the transmission cable, the lower end of the transmission cable passes through the connecting top surface and is connected to the basic downhole camera probe, and the transmission cable is also connected to an electric telescopic device, a heating coil, a retraction motor 1 and a retraction motor 2 to provide power and control.

[0014] The inventive points and corresponding beneficial technical effects of the present invention are as follows: 1. The lower part of the protective cover of the present invention is provided with a triangular protective sheet that can be gathered and separated, and the protective cover can move up and down relative to the basic downhole camera probe to separate the triangular protective sheet for detection and gather the triangular protective sheet to protect the basic downhole camera probe. At this time, the impact force brought by gravity can be used to penetrate the massive mud gangue accumulated in a certain layer in the borehole, which is beneficial to penetrate the massive mud gangue and suspended gangue blocked in the borehole during deep coal drilling detection and marine drilling detection.

[0015] 2. During long-term detection, when the lens is easily worn or dirty due to collision with the hanging rock inside the borehole, the present invention heats the heating ring on the upper part of the current lowest detachable lens assembly to melt the upper connecting glue and the lower connecting glue, thereby causing the worn or dirty detachable lens assembly at the bottom to fall off, and uses the retracting motor to recover the detached detachable lens assembly; then the detection continues.

[0016] 3. The connecting circular tube of the present invention is provided with a filter cover, when the downhole camera probe is detecting in a borehole with water, especially in deep-sea drilling, the internal and external pressure difference can be balanced, which is better adapted to ultra-deep hole detection and improves detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the downhole camera probe of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the protective cover of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the detachable lens assembly of the present invention when it is assembled;

[0020] Figure 4 It is a schematic diagram of the structure of the detachable lens assembly of the present invention when it is disassembled;

[0021] Figure 5 It is a schematic diagram of the structure of the lens connecting device of the present invention;

[0022] Figure 6 It is a structural schematic diagram of the lens recovery device of the present invention;

[0023] In the figure, triangular protective sheet -1, tightening spring -2, connecting ring -102, rotating hinge -3, supporting steel ring -4, supporting rod -5, connecting top surface -6, electric telescopic device -7, lens one -8, lens two -9, lens three -10, connecting slide rod -11, lens connecting device one -12, upper connecting glue -1201, heating ring -1202, lower connecting glue -1203, lens connecting device two -13, folding motor one -1401, folding rope one -1402, folding motor two -1501, folding rope two -1502, top connecting ring -1601, bottom connecting ring one -1602, bottom connecting ring two -1603, connecting round tube -17, connecting hole 18, opening rod 19, filter cover 20. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] The following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] The present invention provides a downhole camera probe for ultra-deep holes, such as Figure 1-2 As shown, it includes a basic downhole camera probe and a protective cover. The basic downhole camera probe can adopt an existing downhole camera probe, such as a downhole camera probe of a SYKJ-23 borehole television imager. The basic downhole camera probe is cylindrical as a whole, and a lens 10 is provided at the bottom; Figure 1-2 As shown, the protective cover includes a support steel ring 4, which is coaxially arranged with the basic downhole camera probe and located at the periphery of the basic downhole camera probe; vertical support rods 5 are evenly arranged circumferentially on the upper part of the support steel ring 4, and all support rods 5 have the same length and are fixed to the connecting top surface 6 at the top; the top of the basic downhole camera probe is connected to the connecting top surface 6 by an electric telescopic rod 7, and the relative position relationship between the basic downhole camera probe and the protective cover is controlled by the telescopic rod 7; horizontally arranged connecting slide rods 11 are evenly arranged circumferentially on the basic downhole camera probe, and the connecting slide rods 11 correspond one by one to the support rods 5 and are facing away from the basic downhole camera probe. One end of the head is slidably connected to the support rod 5, and the support rod 5 is located in the sliding cavity of the connecting slide rod 11; the lower part of the support steel ring 4 is evenly arranged with rotating hinges 3 along the circumferential direction, and the lower part of the support steel ring 4 is fixedly connected to the upper side of the rotating hinge 3, and the lower side of the rotating hinge 3 is connected to the triangular protective sheet 1, and the outer wall of the triangular protective sheet 1 is fixed with a horizontally arranged connecting ring 102, and all the connecting rings 102 are arranged in the same horizontal plane, and a circular tightening spring 2 is arranged in the connecting ring 102. When the tightening spring 2 is in a fully tightened state, all the triangular protective sheets 1 can form a closed connected cone to receive the basic downhole camera probe inside it;

[0027] like Figure 1 , Figure 3-4 As shown, the lower part of the basic downhole camera probe is provided with a lens three 10, and the lower part of the lens three 10 is fixedly provided with a bottom connecting ring two 1603 coaxially; the lower part of the bottom connecting ring two 1603 is connected in sequence with its coaxial centerline to several groups of detachable lens assemblies, and the detachable lens assemblies have the same structure, including a top connecting ring 1601, a connecting tube 17, a lens and a bottom connecting ring one 1602 which are coaxially arranged and fixedly connected in sequence; in this embodiment, there are two groups of detachable lens assemblies, wherein the upper detachable lens assembly is connected to the bottom connecting ring two 1603 through a lens connecting device two 13, and its lens is a lens two 9; the lower detachable lens assembly is connected to the bottom connecting ring one 1602 of the upper detachable lens assembly through a lens connecting device one 12, and its lens is a lens one 8; as shown Figure 1 , Figure 3-5 As shown, the structure of the lens connecting device 2 13 is the same as that of the lens connecting device 1 12, including an upper connecting glue 1201, a heating ring 1202, and a lower connecting glue 1203. The heating ring 1202 is connected to the power supply device through a circuit (not shown in the figure).

[0028] Among them, the top connecting ring 1601, the bottom connecting ring 1 1602, and the bottom connecting ring 2 1603 are all thin circular ring structures, and their inner diameters and outer diameters are the same; the upper connecting glue 1201 and the lower connecting glue 1203 are also thin circular ring structures when in a connected state, and their inner diameters and outer diameters are the same and are the same as the top connecting ring 1601, the bottom connecting ring 1 1602, and the bottom connecting ring 2 1603; the heating ring 1202 is a thin circular ring structure, and its inner diameter and outer diameter are the same as the upper connecting glue 1201 and the lower connecting glue 1203, or the inner diameter of the heating ring 1202 is larger than the inner diameter of the upper connecting glue 1201 and the lower connecting glue 1203, and the outer diameter is smaller than the inner diameter of the lower connecting glue 1203. In addition, the connecting circular tube 17 is a circular tube with a certain thickness and the height is as small as possible. At this time, the outer diameter of the connecting circular tube 17 is equal to the outer diameters of the top connecting ring 1601 and the bottom connecting ring 1602, and the inner diameter of the connecting circular tube 17 is equal to the inner diameters of the top connecting ring 1601 and the bottom connecting ring 1602; or the outer diameter of the connecting circular tube 17 is equal to the inner diameters of the top connecting ring 1601 and the bottom connecting ring 1602, at this time, the outer circles of the top connecting ring 1601 and the bottom connecting ring 1602 are connected by a number of circumferentially uniformly and vertically arranged expansion rods 19.

[0029] In addition, a filter cover 20 is also provided on the connecting circular tube 17. When the downhole camera probe detects in a borehole with water, as the depth increases, the pressure difference between the inside and outside of the connecting circular tube 17 gradually increases. The filter cover can allow water in the borehole to enter the connecting circular tube 17 and filter out impurities, thereby balancing the internal and external pressure differences, better adapting to ultra-deep hole detection, and improving detection efficiency.

[0030] In addition, if Figure 1 , 3 -6, also includes a detachable lens assembly recovery device, the detachable lens assembly recovery device includes a folding motor and a folding rope arranged on the connecting top surface 6, the folding motor is used to fold the folding rope, and the other end of the folding rope is connected to the connecting hole 18 set in the top connecting ring 1602; in the present invention, a folding motor 1401 and a folding motor 2 1501 are arranged on the connecting top surface 6, the folding motor 1401 and the folding motor 2 1501 are respectively connected to one end of the folding rope 1402 and the folding rope 2 1502, and the other ends of the folding rope 1402 and the folding rope 2 1502 are respectively connected to the connecting hole 18 of the bottom connecting ring 1 1602 of the upper detachable lens assembly and the lower detachable lens assembly.

[0031] The present invention also relates to a drilling television imager, including a downhole camera probe, a ground controller, and a transmission cable. The ground controller is connected to the transmission cable, and the lower end of the transmission cable passes through the connecting top surface 6 to be connected to the basic downhole camera probe. The transmission cable is also connected to the electric telescopic device 7, the heating coil 1202, the retraction motor 1 1401 and the retraction motor 2 1501 to provide power and control.

[0032] When the ultra-deep hole downhole camera probe and borehole television imager of the present invention are used for deep coal drilling detection and ocean drilling detection, under normal conditions, the electric telescopic rod 7 is in an extended state, the tightening spring 2 of the protective cover is located at the periphery of the basic downhole camera probe or the detachable lens assembly, and the basic downhole camera probe or the detachable lens assembly opens the tightening spring 2 and the triangular protective sheet 1 to perform normal downhole detection work; when encountering massive mud and gangue accumulated at a certain layer in the borehole, the electric telescopic rod 7 is controlled to retract, the tightening spring 2 of the protective cover is located at the lower part of the basic downhole camera probe or the detachable lens assembly, and the tightening spring 2 and the triangular protective sheet 1 are tightened to perform normal downhole detection work. Under the action of the spring 2, the triangular protective sheet 1 shrinks into a cone shape, completely closing the basic downhole camera probe and the detachable lens assembly, and then uses the impact force brought by gravity to pass through the massive mud and gangue accumulated at a certain layer in the borehole; when passing through the massive mud and gangue accumulated at a certain layer in the borehole, the electric telescopic rod 7 is extended, and the tightening spring 2 of the protective cover is located at the periphery of the basic downhole camera probe or the detachable lens assembly, and the basic downhole camera probe or the detachable lens assembly will open the tightening spring 2 and the triangular protective sheet 1 to perform normal downhole detection work; on the one hand, the protective cover prevents the lens from being worn and stuck with mud, and on the other hand, it has a penetrating effect. During long-term detection, when the lens is easily worn or dirty due to collision with suspended rock inside the borehole, the upper connecting glue 1201 and the lower connecting glue 1203 are melted by heating the heating ring 1202 on the upper part of the current lowermost detachable lens assembly, thereby causing the worn or dirty lowermost detachable lens assembly to fall off, and the detached detachable lens assembly is recovered by a retracting motor; then the detection continues.

[0033] Of course, the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It should be noted that all equivalent substitutions and obvious deformation forms made by any technician familiar with the field under the guidance of this specification fall within the essential scope of this specification and should be protected by the present invention.

Claims

1. A downhole camera probe for ultra-deep holes, characterized in that: It includes a basic downhole camera probe and a protective cover, the basic downhole camera probe is cylindrical as a whole, and a lens three is arranged at the lower part; the protective cover includes a supporting steel ring, the supporting steel ring is arranged coaxially with the basic downhole camera probe and is located at the periphery of the basic downhole camera probe; vertical support rods are arranged circumferentially on the upper part of the supporting steel ring, all support rods have the same length and are fixed to the connecting top surface at the top, and the top of the basic downhole camera probe and the connecting top surface are connected by an electric telescopic rod; horizontally arranged connecting sliding rods are arranged circumferentially on the basic downhole camera probe, the connecting sliding rods correspond to the support rods one by one and are slidably connected to the support rods at the end facing away from the basic downhole camera probe; rotating hinges are evenly arranged circumferentially on the lower part of the supporting steel ring, the lower side of the rotating hinge is connected to the triangular protective sheet, and the outer wall of the triangular protective sheet is fixed with a horizontally arranged connecting rings, all connecting rings are arranged in the same horizontal plane, a circular tightening spring is arranged in the connecting ring, and when the tightening spring is in a fully tightened state, all triangular protective sheets can form a closed connected cone to receive the basic downhole camera probe inside it; a bottom connecting ring 2 is fixedly arranged coaxially at the lower part of the lens 3; a plurality of groups of detachable lens assemblies are connected in sequence coaxially with the lower part of the bottom connecting ring 2, and the detachable lens assemblies have the same structure, including a top connecting ring, a connecting circular tube, a lens and a bottom connecting ring 1 which are arranged coaxially and fixedly connected in sequence, and a lens connecting device is used to connect the detachable lens assemblies and the detachable lens assemblies and the bottom connecting ring 2; the lens connecting device includes an upper connecting glue, a heating ring and a lower connecting glue, and the heating ring is connected to the power supply device through a circuit.

2. The downhole camera probe according to claim 1, characterized in that: The detachable lens assembly consists of two groups, wherein the upper detachable lens assembly is connected to the bottom connecting ring 2 through a lens connecting device, and its lens is lens 2; the lower detachable lens assembly is connected to the bottom connecting ring 1 of the upper detachable lens assembly through a lens connecting device, and its lens is lens 1.

3. The downhole camera probe according to claim 1, characterized in that: The top connecting ring, bottom connecting ring one and bottom connecting ring two are all thin circular ring structures, and their inner diameters and outer diameters are the same; the upper connecting glue and the lower connecting glue are also thin circular ring structures when in a connected state, and their inner diameters and outer diameters are the same and are the same as those of the top connecting ring, bottom connecting ring one and bottom connecting ring two; the heating ring is a thin circular ring structure, and its inner diameter is greater than or equal to the inner diameters of the upper connecting glue and the lower connecting glue, and its outer diameter is less than or equal to the inner diameters of the upper connecting glue and the lower connecting glue.

4. The downhole camera probe according to claim 3, characterized in that: The connecting circular tube is a circular tube with a certain thickness and a height as small as possible. At this time, the outer diameter of the connecting circular tube is equal to the outer diameters of the top connecting ring and the bottom connecting ring, and the inner diameter of the connecting circular tube is equal to the inner diameters of the top connecting ring and the bottom connecting ring; or the outer diameter of the connecting circular tube is equal to the inner diameters of the top connecting ring and the bottom connecting ring, at this time, the outer rings of the top connecting ring and the bottom connecting ring are connected by a number of circumferentially uniformly and vertically arranged expansion rods.

5. The downhole camera probe according to claim 1 or 4, characterized in that: The connecting circular tube is also provided with a filter cover.

6. The downhole camera probe according to claim 1 or 4, characterized in that: It also includes a detachable lens assembly recovery device, which includes a folding motor and a folding rope arranged on the top surface of the connection, the folding motor is used to fold the folding rope, and the other end of the folding rope is connected to a connecting hole arranged on the bottom connecting ring.

7. A drilling television imager for ultra-deep holes, characterized in that: It comprises the downhole camera probe as described in any one of claims 1 to 6, as well as a ground controller and a transmission cable, wherein the ground controller is connected to the transmission cable, the lower end of the transmission cable passes through the connecting top surface and is connected to the basic downhole camera probe, and the transmission cable is also connected to the electric telescopic device, the heating coil, the retraction motor 1 and the retraction motor 2 to provide power supply and control.

Images