CN217462136U

CN217462136U - Wall-attached camera shooting plate and logging instrument with same

Info

Publication number: CN217462136U
Application number: CN202221025079.XU
Authority: CN
Inventors: 雷振东
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-01
Filing date: 2022-05-01
Publication date: 2022-09-20
Anticipated expiration: 2032-05-01

Abstract

The utility model relates to a wall-contact type camera plate and a logging instrument with the device, the camera plate of the utility model comprises a camera plate shell, a camera, a LED lamp bead, sapphire glass, a guide pipe connector, a nozzle, a main pushing arm connector and an auxiliary pushing arm connector; the sapphire glass is embedded in the opening of the camera shooting plate shell; the LED lamp beads and the camera are positioned inside the shell of the camera board; the main pushing arm connector and the guide pipe connector are positioned at the top of the camera shooting plate shell, and the auxiliary pushing arm connector is positioned at the bottom of the camera shooting plate shell; the guide pipe connector is connected with the nozzle through a guide passage, and the nozzle is positioned on the front surface of the camera shooting plate shell; the minimum object distance of the camera is not more than 50 mm. The utility model discloses a board of making a video recording need install on the sidewall contact device of logging instrument, and it can paste the wall of a well under the condition of not washing the well and shoot the image.

Description

Wall-attached camera shooting plate and logging instrument with same

Technical Field

The utility model relates to a logging instrument especially relates to a data acquisition device of visual logging instrument.

Background

The tool is known as the "eye" of oil exploration development. In particular, the micro-resistivity scanning imaging logging instrument and the acoustic wave imaging logging instrument are widely applied to underground sedimentary rock lithofacies analysis and obtain good effects. Both imaging logging techniques avoid to some extent the problem of exploring the sedimentary features of the target layer by coring the borehole. The resolution of the microresistivity scanning imaging logging instrument is the highest, and is most suitable for underground lithofacies analysis. Among the existing various geophysical logging technologies, the visual logging technology has the most potential to surpass the micro-resistivity scanning imaging logging technology. The visual logging tool widely sold in the market at present is mainly used for detecting casing breakage (refer to the device and the method for acquiring downhole color full-frame-rate video through an armored logging cable with the patent application number of 201710708245.3).

However, current visual logging instruments have three deficiencies. 1. Visual logging instruments cannot work in opaque drilling fluids. It is common practice to first perform a well wash and then perform a visual logging operation, which increases construction period and cost. Also, the well bore water is not completely clear after flushing. The visual logging instrument in the prior art is difficult to perform high-resolution optical imaging on the well wall through a slightly turbid liquid medium after well flushing. In order to realize the function of taking video images in the well in the turbid drilling fluid environment, the predecessor proposes a technical method capable of thinning turbid drilling fluid media between a camera in the well and a well wall (refer to a downhole video monitoring cleaning-free device with the patent application number of 202021544837. X), and also proposes a method for cleaning the camera and residual silt of the well wall by using clear water injection (refer to a downhole video data acquisition instrument with the patent application number of 202022209313.1). 2. The camera of a visual logging tool typically takes images along the axial direction of the wellbore, but not along the radial direction of the wellbore. Only the university of west ann's oil has made a related development (refer to a lateral multi-lens compound imaging video logging device with patent number 201010207380.8). Subsequent researchers have studied image fusion technology of self-focusing lens array (refer to a method for displaying a panoramic image of the inner wall of a pipeline and locating defects in the pipeline with patent number 201210556545.1). 3. Most visual logging instruments require a temperature of less than 80 degrees celsius for the operating environment. Because the maximum working temperature of the civil-grade image sensor, the digital signal processor and the LED lamp beads is less than 85 ℃, the electronic camera device is not suitable for running in the high-temperature environment which is ubiquitous in the underground. Previous studies have addressed this problem by means of a cold water circulating protective cover, such as a metallurgical plant monitor that works properly in a thousands of degrees celsius environment (see patent application No. 201911164386.9 for a water-cooled protective cover for industrial cameras).

In an open hole well, the realization of image shooting of a visual logging instrument on a well wall stratum is still a topic to be further researched. Therefore, there is a need for a new visual logging device that can take high resolution images of the borehole wall and rock formation without flushing the well.

At present, the collection of basic data is more and more emphasized in the ocean oil and gas exploration work. If the prospect of beautiful vision of well wall and rock stratum digitization can be really and successfully realized in the foreseeable future, the problem of lack of sedimentary rock core data in marine oil and gas exploration can be relieved, and the regional sedimentary feature can be better known. For example, professor of the energy college of the geological university of china (beijing) has been interested in deep-water sequence stratigraphy as well as high-resolution sequence stratigraphy. However, these two studies are limited by the insufficient abundance of geological data. The utility model discloses if successfully realize will be for it provides the approach of the geological data that has the specialty. In unconventional oil and gas exploration work, the utility model discloses even the image of shooting the wall of a well rock stratum is fuzzy a bit, also can promote the research work of high resolution deep water sequence stratigraphy. The blurred borehole wall and rock formation images have unique data value for the conventional well logging curve. Therefore, the visualization of the well wall rock stratum is very significant for natural science research or prospecting work.

Disclosure of Invention

The claimed invention is part to solve and improve: an object of the utility model is to create a can be in the mud environment to the wall of a well shooting image paste wall of a well formula camera device and install device's logging instrument.

In order to achieve the above object, in some embodiments of the present invention, the following technical solutions are provided:

the utility model provides a wall-mounted camera plate, which comprises a camera plate shell, at least one camera, at least one LED lamp bead and sapphire glass; the sapphire glass is hermetically embedded in the opening on the front surface of the camera shooting plate shell; the LED lamp beads and the camera are positioned inside the shell of the camera board, and the LED lamp beads and the camera are characterized by also comprising a guide pipe connector used for connecting a branch guide pipe; at least one nozzle with the function of spraying transparent well-flushing liquid; a main push arm connector and a sub push arm connector for connecting the push arms; the main pushing arm connector and the guide pipe connector are positioned at the top of the camera shooting plate shell, and the auxiliary pushing arm connector is positioned at the bottom of the camera shooting plate shell; the guide pipe connector is connected with the nozzle through a guide passage, and the nozzle is positioned on the front surface of the camera shooting plate shell; the minimum object distance of the camera is not more than 50 mm.

In some embodiments, the well wall-attached type camera plate of the present invention further comprises a distance limiting guide plate having a function of limiting the distance between the camera plate and the well wall; the distance limiting guide plate is positioned on the front surface of the camera shooting plate shell.

In some embodiments, the camera board shell of the camera board of the present invention contains a hollow interlayer, and the hollow interlayer is used as a flow guide channel for the transparent well-flushing fluid.

In some embodiments, the utility model discloses a inside the board casing of making a video recording of board for the sealed cavity of installing all kinds of electronic components is vacuum state.

In some embodiments, the camera board of the present invention comprises a nozzle having a function of removing the mud cake from the well wall by means of a jet, said nozzle being located at the top of the front face of the camera board housing.

In some embodiments, the camera board of the present invention further comprises an optical fiber image bundle and an objective lens; one end of the optical fiber image transmission bundle is connected with the camera, and the other end of the optical fiber image transmission bundle is connected with the objective lens; the objective lens is close to the inner side surface of the sapphire glass.

In some embodiments, the front face of the camera board housing of the camera board of the present invention has a nozzle for washing sapphire glass.

In some embodiments, the utility model discloses a surface of the board casing of making a video recording of wall of a well formula board of making a video recording scribbles the aerogel coating that the one deck has thermal-insulated function.

In some embodiments, the outer side surface of the sapphire glass of the well wall-attached type camera plate of the utility model is provided with a layer of toughened glass film; the toughened glass film has one layer of oleophobic film.

In some embodiments, the wall-contact type camera board of the present invention further comprises a light guide fiber; LED lamp pearl that is located the inside of board casing of making a video recording is connected to leaded light optic's one end, and sapphire glass 4's medial surface is pressed close to leaded light optic's the other end.

The utility model also provides a logging instrument, it includes the above-mentioned wall of a well formula camera board of pasting, still includes logging instrument basement, mud cake scraper, sidewall contact, no less than a pair of backup arm, water pipe crossover head, cable connector, logging cable, total honeycomb duct, no less than one branch honeycomb duct and centralizer; the centralizer is positioned at the lower part of the logging instrument backbone, the sidewall contact device is positioned at the middle part of the logging instrument backbone, and the mud cake remover is positioned at the upper part of the logging instrument backbone; the cable connector and the water pipe conversion head are positioned at the top end of the logging instrument backbone; the sidewall contact device comprises at least one pair of pushing arms, and the pair of pushing arms is correspondingly connected with one camera shooting plate of the utility model; the input end of the water pipe conversion head is a connector which is used for connecting the main flow guide pipe; the output end of the water pipe conversion head comprises at least one connector, and the connector of one output end is correspondingly connected with a branch flow guide pipe; the other end of each branch flow guide pipe extends downwards outside the base stem of the logging instrument and is connected with the camera board in a one-to-one correspondence manner; the cable connector is used for connecting a logging cable.

In some embodiments, the inner wall of the main flow guide pipe contains an aerogel coating with a heat insulation function.

In some embodiments, the walls of the main draft tube include a layer of insulation comprising aerogel spacers.

In some embodiments, the walls of the main draft tube include an insulating layer made of fiberglass material.

In some embodiments, the logging cable employed by the logging tool of the present invention is a fiber optic logging cable.

In some embodiments, the total flow conduit is selected to have a material density that is such that the average density of the total flow conduit combined with the transparent flushing fluid therein is close to the density of the drilling mud, in order to avoid excessive buoyancy or gravity in the drilling mud.

In some embodiments, the sidewall contact device of the tool of the present invention is a pendulum sidewall contact device comprising a slider stop device.

In some embodiments, the sidewall contact device of the tool of the present invention is an umbrella sidewall contact device.

Compared with the prior art, the utility model discloses technical scheme's beneficial effect lies in:

(1) the utility model discloses a board of making a video recording can paste the wall of a well and shoot the image. The minimum object distance of the adopted camera can reach 1mm, and the depth of field can be within the range of 1mm-200 mm. The camera board of the utility model can be close to the well wall to shoot images, and can adapt to the uneven condition of the well wall to a certain extent;

(2) the utility model discloses a board of making a video recording can shoot the wall of a well image under the condition of not washing the well. Because the utility model discloses a camera shooting plate can paste the wall of a well and shoot the image, and this just means the utility model discloses an opaque mud content that contains between camera shooting plate and the well drilling wall of a well is less. Under the condition that mud cakes with the thickness of 0.5-2mm generally attached to the well wall are cleaned by the mud cake scraper, turbid mud between the camera shooting plate and the well wall can be more easily replaced by the transparent well washing liquid sprayed by the nozzles. Because the space between the camera plate and the well wall is narrow, Brownian motion is slow, and therefore the camera on the camera plate can complete image shooting of the well wall stratum before the transparent well washing liquid is mixed with the turbid mud; compare in prior art's visual logging technique, the utility model discloses a camera on the board of making a video recording is apart from the wall of a well only the distance of millimeter level, consequently can realize that high resolution's image is shot, more conveniently carries out lithofacies analysis. Under the condition that the mud cake scraper carries out high-quality scraping on the well wall mud cake, the camera shooting plate of the utility model has the potential to realize the measurement of the sandstone granularity of the smooth well wall stratum which does not contain heavy oil components;

(3) the utility model discloses a part improved generation embodiment of board of making a video recording can work under high temperature high pressure environment. In the aspect of high pressure resistance, the utility model discloses a technical method commonly used at present visual logging instrument. In high temperature resistant aspect, because the camera, LED lamp pearl, electronic components such as digital signal processor are harsh to operating temperature's requirement, and the highest can not exceed 85 degrees centigrade, this is also the utility model discloses in the most difficult problem of thorny. Therefore, the technical method of the vacuum heat insulation, the aerogel thermal insulation layer and the transparent well washing liquid cooling shell in the embodiment of the partial improved embodiment of the utility model isolates the external high temperature environment of the camera shooting plate shell. If transparent well-flushing liquid transports to the logging instrument in the pit from the earth's surface with keeping microthermal mode, so through will the utility model discloses the hollow intermediate layer of camera board casing just can play the effect of cooling the casing as the water conservancy diversion passageway of transparent well-flushing liquid, and then keeps the utility model discloses the inside electronic components of camera board works under lower temperature.

Drawings

Various schematic structural diagrams corresponding to the embodiments of the present invention in the specification are shown in the drawings. The figures are not drawn to scale. The drawings may have enlarged details of certain structural features for clarity of presentation and may omit details of certain structural features. The shapes of the various parts and their relative sizes and positional relationships shown in the drawings are merely exemplary. The skilled person can additionally design parts with different shapes, sizes and relative positions according to the actual needs.

FIG. 1 is a perspective view of the front structure of a camera board in the first embodiment

FIG. 2 is a perspective view of the back surface structure of the image pickup plate in the first embodiment

FIG. 3 is a schematic view showing the cross-sectional position of the imaging plate in the first embodiment

FIG. 4 is a sectional view of a section A-B of the image pickup plate in the first embodiment

FIG. 5 is a sectional view of a section C-D of the image pickup plate in the first embodiment

FIG. 6 is a sectional view of a section E-F of the image pickup plate in the first embodiment

FIG. 7 is a perspective view showing the front structure of a camera board in the second embodiment

FIG. 8 is a perspective view of the back structure of the imaging plate in the second embodiment

FIG. 9 is a schematic view showing the cross-sectional position of the imaging plate in the second embodiment

FIG. 10 is a sectional view of a section A-B of the image pickup plate in the second embodiment

FIG. 11 is a perspective view of a distance-limiting baffle of a second embodiment of a camera panel

FIG. 12 is a sectional view of a section C-D of the image pickup plate in the second embodiment

FIG. 13 is a sectional view of a section E-D of the image pickup plate in the second embodiment

FIG. 14 is a perspective view of the front structure of an image pickup plate in the third embodiment

FIG. 15 is a perspective view of the back surface structure of the image pickup plate in the third embodiment

FIG. 16 is a schematic view showing the cross-sectional position of the imaging plate in the third embodiment

FIG. 17 is a sectional view of a section A-B of the image pickup plate in the third embodiment

FIG. 18 is a sectional view of a section C-D of the image pickup plate in the third embodiment

FIG. 19 is a perspective view showing the front structure of an image pickup panel in the fourth embodiment

FIG. 20 is a perspective view of the back surface structure of the image pickup plate in the fourth embodiment

FIG. 21 is a schematic view showing a cross-sectional position of an image pickup plate in the fourth embodiment

FIG. 22 is a sectional view of a section A-B of the imaging plate in the fourth embodiment

FIG. 23 is a sectional view of section C-D of the image pickup plate in the fourth embodiment

FIG. 24 is a sectional view of a section E-F of an image pickup plate in the fourth embodiment

FIG. 25 is a schematic view of the structure of the camera head, the optical fiber bundle and the objective lens thereof

FIG. 26 is a schematic view of the structure of the logging tool with the camera plate of the present invention

FIG. 27 is a schematic view of a method of using a logging tool with a camera plate according to the present invention

The utility model discloses a paste reference numeral of wall of a well formula board of making a video recording: the camera shooting plate comprises a camera shooting plate front shell 101, a camera shooting plate rear shell 102, a main pushing arm connector 103, a secondary pushing arm connector 104, a guide pipe connector 105, a camera 2, a groove 201, an optical fiber image transmitting bundle 202, an objective lens 203, a bakelite sheath 204, LED lamp beads 3, sapphire glass 4, a nozzle 501 and a guide channel 502. The device comprises a distance-limited guide plate 6, a circuit board 7, a lead 701, a lead hole 702, a circuit board step 703, a fixer 8, a sealing rubber ring 901, a sealing screw 902, a stud 903, a multi-core pressure-bearing sealing plug 904, a nozzle sealing rubber ring 905 and a vacuum layer 106.

The utility model discloses a reference numeral of logging instrument: the device comprises a camera plate 10, a logging instrument backbone 11, a mud cake scraper 12, a sidewall contact 13, a pair of sidewall contact arms 1301, a water pipe conversion head 14, a cable connector 15, a logging cable 16, a main flow guide pipe 17, a branch flow guide pipe 1701, a well wall 18, drilling mud 19, transparent well flushing liquid 20 and a centralizer 21.

Detailed Description

The following detailed description refers to the accompanying drawings that illustrate embodiments in which the invention may be practiced. It is to be noted that the various embodiments described herein are not necessarily mutually exclusive, and thus the technical features of the different embodiments may be combined to form new embodiments. The functional and structural principles of the present invention have been shown and described in embodiments, and the embodiments of the present invention can be modified or altered without departing from the principles. The dependent claims are hereby applied to the extent that the features of the different embodiments are combined together without conflict.

In the detailed description of the embodiments, words such as "top", "bottom", "sides", "lower", "middle", "upper", "middle lower", "inner", "outer", "lower", and "upper" are used depending on the orientation characteristics of the respective parts in the drawings to which reference is made. The description of the orientation features of the different parts is used to illustrate the embodiments and is in no way limiting of the technical features.

"Top end", "bottom end" and "sides" are used to describe the orientation features of the edges of an object.

"lower", "middle", "upper", "middle upper" and "middle lower" are used to describe the orientation features of one object within the volume of another object. That is, the two objects whose orientation features are compared are in an inclusion-to-inclusion relationship.

"lower" and "upper" are used to describe the orientation features of one object that are outside the volumetric range of another object. That is, two objects to which the orientation features are compared should be viewed as two objects with no inclusion relationship.

The features of orientation of the individual parts described in the independent claims are defined with reference to the abstract drawing.

In the description of the present invention, unless explicitly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

The utility model discloses a paste wall of a well formula and make a video recording board can be referred to as "the board of making a video recording" for short in this specification.

"the front of making a video recording the board casing" means the utility model discloses a board of making a video recording is used for laminating or pressing close to the wall of a well to in that face of gathering wall of a well image data. This face may also be referred to as the "front face of the front shell of the camera plate".

The "back surface of the front camera board case" means a surface opposite to the front surface of the front camera board case.

"sapphire glass's medial surface" is that the face normal direction of the sapphire glass who inlays in the opening of the board casing of making a video recording of the utility model points to the inside of the board casing of making a video recording, that is to say that the side that inside components and parts of the board casing of making a video recording can contact.

The "outer side surface of the sapphire glass" means a surface opposite to the inner side surface of the sapphire glass.

The term "depth of field" refers to the range of distance between the front and back of the subject measured in front of the camera along the image that enables a sharp image to be taken. The term "object distance" refers to the distance between the object plane and the front main surface of the lens;

the term "minimum object distance" refers to the smallest object distance value that the camera can clearly image the shot object. When the distance between the shot object and the camera is smaller than the minimum object distance, the camera cannot realize clear imaging of the shot object.

The term "transparent well-flushing fluid" refers to an aqueous or oil solution, which may contain solvents such as emulsifiers, surface tension agents, etc., and a typical example in the art may refer to a mud-cake cleaning fluid for deepwater synthetic-based drilling fluids and its application in patent application No. 201810137967.2, a non-acidic mud-cake flushing agent in patent application No. 201510753194.7, a flushing fluid and a flushing method.

The term "LED lamp bead" mainly refers to a surface mounted LED lamp bead, but the direct-insertion LED lamp bead should be considered as an equivalent alternative with the same technical and functional features, and should not be considered as a product of creative work.

The term "cylindrically curved surface" refers to a curved surface having curvature in one direction.

The "1 pair of the reclining arms" means a combination of 1 main reclining arm and 1 sub reclining arm corresponding thereto.

Referring to fig. 1 to 6, the first embodiment of the wall-mounted camera plate of the present invention can be used for explaining, the camera plate includes a camera plate housing, a camera 2, a LED lamp bead 3, a sapphire glass 4, a fluidic device, a push arm connector, a distance-limiting guide plate 6, a circuit board 7, a fixer 8 and a connecting fitting; the camera shooting plate shell comprises a camera shooting plate front shell 101 and a camera shooting plate rear shell 102; the push arm connector includes a main push arm connector 103 and a sub push arm connector 104; the fluidic device comprises a flow conduit connector 105, a nozzle 501 and a flow conduit channel 502; the connection fitting includes a sealing rubber ring 901, a sealing screw 902, a stud 903, and a wire 701.

Referring to fig. 1 and 2, a sapphire glass 4 is hermetically mounted in an opening in the middle of the front surface of the camera board front case 101.

Referring to fig. 4, the edge of the opening of the front case 101 of the camera panel is provided with a step for more stably fixing the sapphire glass 4. A rubber gasket is arranged between the sapphire glass 4 and the opening edge of the front shell 101 of the camera panel, and is used for realizing the sealing installation (not shown in the figure) of the sapphire glass 4.

A disposable tempered glass film (not shown) is attached to the outer surface of the sapphire glass 4 by electrostatic adsorption, and this is provided to prevent abrasion of the sapphire glass 4. If the camera 2 observes that the toughened glass film is firstly broken, whether the logging operation is interrupted or not can be selected so as to attach the toughened glass film again.

Referring to fig. 4, the front surface of the front case 101 of the camera board and the sapphire glass 4 embedded therein are combined to form an arc shape; referring to fig. 6, the front surface of the camera board front case 101 and the sapphire glass 4 embedded therein are combined to form a straight line shape. The front surface of the camera board front shell 101 embedded with the sapphire glass 4 is a cylindrical curved surface, which is arranged to be better attached to the cylindrical well wall of the well, as can be explained by combining fig. 4 and fig. 6.

Referring to fig. 4 and fig. 1, the camera 2 and the LED lamp beads 3 are located inside the front case 101 of the camera board, and the lens of the camera 2 and the LED lamp beads 3 are both close to the inner side surface of the sapphire glass 4. The arrangement mode of the camera array is 4 rows, 6 cameras are arranged in each row, and the arrangement is used for making up the defect that the shooting view field of each camera 2 is small when the camera plate is close to the well wall to shoot images. The LED lamp bead array is arranged into 5 rows, and each row is 9. 4 lines of camera arrays are installed at the interline interval of 5 lines of LED lamp bead arrays. The arrangement is to obtain a sufficient and uniform light source when the camera board is used for measuring the adherence.

The outer diameter of the lens of the camera 2 adopted in the embodiment is 2mm, and the total length is 3.5 mm. The minimum object distance of the camera 2 is 3mm, the depth of field is 3-70mm, and the visual angle is 90 degrees. The camera 2 adopts a CMOS image sensor with the size of 1.8mm x 1.8 mm. For the detailed parameters and the manufacturing method of the lens, reference is made to an article published in journal "advances in laser and optoelectronics" entitled "design of a subminiature wide-angle medical endoscope lens" and WS-K series industrial endoscope lenses produced by Shenzhen, micro-vision optoelectronics limited company. It should be understood that the utility model discloses a camera 2 and LED lamp pearl 3 of board of making a video recording type, number and arrangement can change, do not influence the utility model discloses the implementation effect of device.

Referring to fig. 4 and 5, the holder 8 is a bakelite plate, which is shaped like a cylindrical curved surface parallel to the sapphire glass 4, and the LED lamp bead 3 and the camera 2 are fixed on the holder 8 by gluing. The holder 8 is connected to the camera panel front case 101 by a stud 903. So set up for the medial surface that enables to install camera 2 and LED lamp pearl 3 on the fixer 8 and press close to sapphire glass 4 more steadily on.

Referring to fig. 6, the circuit board 7 is fixed to the lower side of the holder 8 by the stud 903 attached to the front case 101 of the camera board. The circuit board 7 includes a power module, a digital signal processing module, a signal transmitting module, and the like. The power supply module is used for supplying power to the camera 2 and the LED lamp beads 3; the digital signal processing module comprises a digital signal processor and is used for processing photoelectric data received by an image sensor of the camera and carrying out network video coding; and the network high-speed transmission module transmits the data processed by the digital signal processing module to a computer on the earth surface through a data line. The technical characteristics can refer to the device and the method for acquiring downhole color full frame rate video through the armored logging cable, which are disclosed in the patent application No. 201710708245.3. The design of circuit board adopt completely with the utility model discloses irrelevant prior art, in order to accomplish succinctly, the utility model discloses other functional modules that circuit board related are no longer being repeated in description and claim.

Referring to fig. 2, a seal screw 902 is screwed with a stud 903 through a prepared hole of the camera panel rear case 102, so that the camera panel rear case 102 is correspondingly installed in an opening at the back of the camera panel front case 101. The sealing screw 902 is end face sealed, and a sealing groove is arranged on one side of the head of the sealing screw close to the thread. Sealing rings are arranged in the sealing grooves to ensure sealing (not shown in the figure). The contact portion of the camera panel rear case 102 and the camera panel front case 101 sandwiches a seal rubber 901.

Referring to fig. 1, a main push arm connector 103 and a guide duct connector 105 are welded to the top end of a camera board front case 101; the sub push arm connector 104 is welded to the bottom end of the camera board front case 101.

Referring to fig. 6, the main push arm connector 103 is a hollow stepped shaft of metal material, and the sub push arm connector 104 is two metal pin holes perpendicular to each other. The two connectors are used to connect the backup arms of the tool sidewall rams. This feature may be referred to in the art as a microresistivity imaging tool pad connector.

Referring to fig. 6, the lead wire 701 of the circuit board 7 enters the inside of the main push arm connector 103 through a lead wire hole 702 of the front case 101 of the camera board, and a gap between the lead wire hole 702 and the lead wire 701 is filled with a sealing expansion glue. The arrangement is such that the lead 701 can be connected to an external lead in a sealed environment. The high-pressure resistant sealing panel-penetrating wire-passing technology can refer to a high-temperature and high-pressure resistant panel-penetrating wire-passing mechanism of patent No. 201320424129.6.

Referring to fig. 5, the flow tube connector 105 is made of a metal material and has a hollow tubular structure. An opening is arranged on the edge of the guide pipe connector, one end of a guide passage 502 is welded on the opening of the guide pipe connector in a sealing mode, and the other end of the guide passage 502 is provided with a nozzle 501.

Referring to fig. 1, a flow guide channel 502 is located above the sapphire glass 4, and a part of the flow guide channel 502 is welded on the front surface of the front camera plate case 101. The nozzle 501 has a flat, long, strip shape. The arrangement is that in the process of making the logging instrument do slow uniform motion upwards, the transparent well-flushing liquid sprayed by the nozzle 501 above the sapphire glass 4 can flow downwards in a laminar flow mode and fully replaces turbid slurry between the sapphire glass 4 and the well wall.

Referring to fig. 1, the distance-limiting baffle 6 is two strip-shaped partition plates made of metal materials and welded on the front shell 101 of the camera plate, and the two strip-shaped partition plates are respectively located on two sides of the sapphire glass 4 and are parallel to two side edges of the front shell 101 of the camera plate.

Referring to fig. 4, the distance-limited baffle 6 has a height of 15 mm. The arrangement is to avoid the friction between the sapphire glass 4 in the middle of the front shell of the camera board and the well wall.

Referring to fig. 1, the distance-limited deflector 6 can guide the transparent well-flushing liquid sprayed from the nozzle 501 above the distance-limited deflector 6 to flow downwards, so as to prevent the transparent well-flushing liquid from running off from the two sides of the front shell 101 of the camera board.

Reference to fig. 7 to 13 can be used to explain the second embodiment of the wall-mounted camera plate of the present invention, which comprises a camera plate housing, a camera 2, a LED lamp bead 3, sapphire glass 4, a fluidic device, a pushing arm connector, a distance-limiting guide plate 6, a circuit board 7 and a connecting fitting. The camera shooting plate shell comprises a camera shooting plate front shell 101 and a camera shooting plate rear shell 102; the push arm connector includes a main push arm connector 103 and a sub push arm connector 104; the fluidic device comprises a flow conduit connector 105, a nozzle 501 and a flow conduit channel 502; the connection fitting comprises a sealing rubber ring 901, a sealing screw 902, a stud 903, a multi-core pressure-bearing sealing plug 904 and a lead 701.

Referring to fig. 8 and 10, the sapphire glass 4 is hermetically fitted in a circular opening in the middle of the front surface of the camera board front case 101. The edge of the opening of the front case 101 of the camera panel is provided with a step for fixing the sapphire glass 4 more stably. A rubber gasket is arranged between the sapphire glass 4 and the edge of the opening of the front shell 101 of the camera panel, and is used for realizing the sealing installation of the sapphire glass (not shown in the figure).

Referring to fig. 10 and 7, the camera 2 and the LED lamp beads 3 are located inside the camera board housing, and the lens of the camera 2 and the LED lamp beads 3 are both close to the inner side surface of the sapphire glass 4. The camera 2 is positioned in the middle of the LED lamp beads 3 which are arranged in an annular mode. The arrangement is to obtain a sufficient and uniform light source when the camera board is attached to the wall for measurement.

The outer diameter of the lens of the camera 2 adopted in the embodiment is 6mm, and the total length is 8 mm. The minimum object distance of the camera 2 is 50mm, and the visual angle is 80 degrees. The camera 2 adopts a CCD image sensor. For the detailed parameters and manufacturing method of the lens, reference is made to VIE-in series police surveillance video endoscopes manufactured by Mingda high-tech, Kyoto, Beijing. It should be understood that the utility model discloses a camera 2 and LED lamp pearl 3 of board of making a video recording type, number and arrangement can change, do not influence the utility model discloses the implementation effect of device.

Referring to fig. 10 and 13, the LED lamp bead 3 and the camera 2 are soldered on the circuit board 7. The circuit board 7 is connected to the camera panel front case 101 through a stud 903. The circuit board 7 includes a power module, a digital signal processing module, a signal transmitting module, and the like. The power supply module is used for supplying power to the camera 2 and the LED lamp beads 3; the digital signal processing module comprises a digital signal processor and is used for processing photoelectric data received by an image sensor of the camera and carrying out network video coding; and the network high-speed transmission module transmits the data processed by the digital signal processing module to a computer on the earth surface through a data line. The technical characteristics can refer to the device and the method for acquiring downhole color full-frame rate video through the armored logging cable of patent application number 201710708245.3. The design of circuit board adopt completely with the utility model discloses irrelevant prior art, in order to accomplish succinctly, the utility model discloses other functional modules that circuit board related are no longer being repeated in description and claim.

Referring to fig. 8, a seal screw 902 is threaded through a prepared hole of the camera panel rear case 102 and a stud 903, so that the camera panel rear case 102 is correspondingly installed in an opening at the back of the camera panel front case 101. The sealing screw 902 is end face sealed, and a sealing groove is arranged on one side of the head of the sealing screw close to the thread. The sealing groove is internally provided with a sealing ring to ensure sealing (the technical characteristics are common prior art and are not shown in the figure). The contact portion of the camera panel rear case 102 and the camera panel front case 101 sandwiches a seal rubber 901.

Referring to fig. 7, a main push arm connector 103 and a guide duct connector 105 are welded to the top end of the camera board front case 101; the sub push arm connector 104 is welded to the bottom end of the camera board front case 101.

Referring to fig. 13, the main push arm connector 103 is a hollow stepped shaft of metal material and the secondary push arm connector 104 is two metal pin holes perpendicular to each other. The two connectors are used to connect the backup arms of the tool sidewall rams. This feature may be referred to in the art as a microresistivity imaging tool pad connector.

Referring to fig. 13, the multi-core pressure-bearing sealing plug is tightly fixed on the front camera panel case 101 by screwing. The lead 701 of the circuit board 7 is connected with one end of a multi-core pressure-bearing sealing plug 904, and the other end of the multi-core pressure-bearing sealing plug 904 is connected with an external lead. The arrangement is such that the lead 701 can be connected to an external lead in a sealed environment.

Referring to fig. 12, the flow tube connector 105 is made of a metal material and has a hollow tubular structure. An opening is provided at the edge of the flow conduit connector and one end of the flow conduit 502 is sealingly welded to the opening of the flow conduit connector. The other end of the flow guide channel 502 is provided with two nozzles 501.

Referring to fig. 12, two nozzles 501 are located above the sapphire glass 4. A nozzle is directed towards the sapphire glass 4 and is positioned to flush residual debris from the sapphire glass. The other nozzle is towards the opening opened by the distance-limiting guide plate, and the arrangement is to quickly replace turbid slurry among the distance-limiting guide plate 6, the sapphire glass 4 and the well wall.

Referring to fig. 11, the distance-limited baffle 6 is formed by welding together four pieces of a metallic material. The edges of the left side and the right side of the top of the distance-limiting guide plate 6 are straight lines, and the upper edge and the lower edge of the top of the distance-limiting guide plate 6 are convex arc curves. The arrangement is that the distance-limiting guide plate 6 can be better attached to the wall of the cylindrical drilling well.

Referring to fig. 12 and 7, the height of the distance-limiting baffle 6 is 5cm, and the arrangement is such that the camera 2 used in the present embodiment can clearly image. So that the nozzle 501 can spray a large amount of transparent flushing fluid to dilute the turbid mud until it is very clear.

Referring to fig. 14 to 18, the third embodiment of the wall-mounted camera plate of the present invention is illustrated, wherein the camera plate includes a camera plate housing, a camera 2, a LED lamp bead 3, a sapphire glass 4, a fluidic device, a sidewall contact arm connector, a distance-limiting guide plate 6, a circuit board 7, a fixer 8, and a connection fitting. The camera shooting plate shell comprises a camera shooting plate front shell 101 and a camera shooting plate rear shell 102; the push arm connector includes a main push arm connector 103 and a sub push arm connector 104; the fluidic device comprises a flow guide pipe connector 105, a nozzle 501 and a flow guide channel 502; the connection fittings include a sealing rubber ring 901, a sealing screw 902, a stud 903, a lead 701, and a circuit board step 703.

Referring to fig. 15 and 14, 9 pieces of circular sapphire glass and 4 pieces of elongated sapphire glass are hermetically mounted in the opening in the middle of the front surface of the front case 101 of the camera board.

Referring to fig. 17, the front opening of the front case 101 of the camera board has a trapezoidal shape with a wide top and a narrow bottom. Accordingly, the cross section of the sapphire glass embedded in the front opening of the camera board housing is also trapezoidal in shape. The arrangement is to realize the sealing effect under the high-pressure environment through the boosting type self-sealing structure (refer to a high-temperature high-pressure micro-resistivity scanning imaging logging instrument polar plate with the patent application number of 99116390.7). Sealing expansion glue is filled in the opening edges of the sapphire glass 4 and the front shell 101 of the camera panel, and is used for realizing the sealing installation of the sapphire glass 4.

A disposable tempered glass film (not shown) is attached to the outer side surface of each sapphire glass 4 by electrostatic adsorption, and the arrangement is to prevent the sapphire glass 4 from being worn. If the camera 2 observes that the toughened glass film is broken first, the logging operation can be optionally interrupted to reattach the toughened glass film.

Referring to fig. 17, the front surface of the front case 101 of the camera board and the sapphire glass 4 embedded therein are combined to form an arc shape; referring to fig. 18, the front surface of the camera board front case 101 and the sapphire glass 4 embedded therein are combined to form a straight line shape. The front surface of the camera board front shell 101 embedded with the sapphire glass 4 can be described by combining fig. 17 and fig. 18 to be a cylindrical curved surface, and the front surface is arranged to be better attached to a cylindrical well wall.

The outer diameter of the lens of the camera 2 adopted in the embodiment is 2mm, and the total length is 3.5 mm. The minimum object distance of the camera 2 is 2mm, the depth of field is 2-100mm, and the visual angle is 140 degrees. The camera 2 adopts a CCD image sensor. Reference is made to the endoscopic lens of olympus gastroenteroscopy cv170 for the method of making this lens. It should be understood that the utility model discloses a camera 2 and LED lamp pearl 3 of board of making a video recording type, number and arrangement can change, do not influence the utility model discloses the implementation effect of device.

Referring to fig. 17, the holder 8 is a wooden plate having a cylindrical curved surface parallel to the front surface of the front case 101 of the camera board inlaid with the sapphire glass 4.

Referring to fig. 18, the LED lamp bead 3 and the camera 2 are fixed on the holder 8 by gluing. The holder 8 is connected to the camera panel front case 101 by a stud 903. So set up for the medial surface that sapphire glass 4 is pressed close to more steadily to enable camera 2 and LED lamp pearl 3 of installing on fixer 8.

Referring to fig. 14, a camera 2 is installed behind each circular sapphire glass 4, and 9 LED beads 3 are installed behind each elongated sapphire glass 4. The arrangement is to obtain a sufficient and uniform light source when the camera board is used for measuring the adherence.

Referring to fig. 18, the circuit board 7 is fixedly attached below the holder 8 by a circuit board step 703 on the front case 101 of the camera board. The circuit board 7 includes a power module, a digital signal processing module, a signal transmitting module, and the like. The power supply module is used for supplying power to the camera 2 and the LED lamp beads 3; the digital signal processing module comprises a digital signal processor and is used for processing photoelectric data received by an image sensor of the camera and carrying out network video coding; and the network high-speed transmission module transmits the data processed by the digital signal processing module to a computer on the earth surface through a data line. The technical characteristics can refer to the device and the method for acquiring downhole color full frame rate video through the armored logging cable, which are disclosed in the patent application No. 201710708245.3. The design of circuit board adopt completely with the utility model discloses irrelevant prior art, in order to accomplish succinctly, the utility model discloses other functional modules that circuit board related are no longer being repeated in description and claim.

Referring to fig. 15, a seal screw 902 is screwed with a stud 903 through a prepared hole of the camera panel rear case 102, so that the camera panel rear case 102 is correspondingly installed in an opening at the back of the camera panel front case 101. The sealing screw 902 adopts end face sealing, and a sealing groove is arranged at one side of the head of the sealing screw 902 close to the thread. The sealing groove is internally provided with a sealing ring to ensure sealing (the technical characteristics are common prior art and are not shown in the figure). The contact portion of the camera panel rear case 102 and the camera panel front case 101 sandwiches a seal rubber 901.

Referring to fig. 14, a main push arm connector 103 and a guide duct connector 105 are welded to the top end of the camera board front case 101; the sub push arm connector 104 is welded to the bottom end of the camera board front case 101.

Referring to fig. 18, the primary push arm connector 103 is two metal pin holes perpendicular to each other, and the secondary push arm connector 104 is a hollow stepped shaft of metal material. The two connectors are used to connect the backup arms of the tool sidewall rams. This feature may be referred to in the art as a microresistivity imaging tool pad connector.

Referring to fig. 18, the lead wire 701 of the circuit board 7 is passed through a lead wire hole 702 of the front case 101 of the camera board into the inside of the sub push arm connector 104, and the gap between the lead wire hole 702 and the lead wire 701 is filled with a sealing expansion paste. The arrangement is such that the lead 701 can be connected to an external lead in a sealed environment. The high-pressure resistant sealing panel-penetrating wire-passing technology can refer to a high-temperature and high-pressure resistant panel-penetrating wire-passing mechanism of patent No. 201320424129.6.

Referring to fig. 18, the flow tube connector 105 is made of a metal material and has a hollow tubular structure. The front shell 101 of the camera board contains a hollow interlayer, and the hollow interlayer is used as a flow guide channel 502. The chamber of the camera board housing in which the electronic components are mounted is separated from the flow guide passage 502. The flow guide channel 502 is communicated with the flow guide pipe connector 105, and two nozzles 501 are arranged above the flow guide channel.

Reference is made to fig. 14 and 18, which illustrate the features of the orientation of the part of fig. 14. Two nozzles 501 are located above the array of cameras 2. The upper nozzles 501 are directed obliquely upward, and the lower nozzles 501 are directed obliquely downward. The upper nozzle and the lower nozzle are separated by a distance limiting guide plate. The arrangement is that in the process of making the logging instrument perform slow and uniform motion upwards, the upper nozzle 501 can further clear mud cakes remained on the well wall. The transparent flushing fluid sprayed from the lower nozzle 501 can flow downwards in a laminar flow and sufficiently replace turbid slurry between the sapphire glass 4 and the well wall.

Referring to fig. 14, the distance-limited baffle 6 is composed of three strips of polyurethane plastic materials connected together, and the distance-limited baffle 6 is glued to the front surface of the front shell 101 of the camera board. Two strip-shaped partition boards in the distance-limiting guide plate 6 are respectively positioned at two sides of the sapphire glass 4 and are parallel to the edges of two sides of the front shell 101 of the shooting plate. The other strip-shaped partition board in the distance-limiting guide plate 6 is positioned between the upper strip-shaped nozzle 501 and the lower strip-shaped nozzle 501 and is parallel to the two strip-shaped nozzles 5.

Referring to fig. 17, the height of the distance-limiting baffle 6 is 10 mm. The arrangement is that the distance between the front surface of the camera shooting plate shell and the well wall can be limited in a well with a small well diameter, and therefore abrasion of the camera shooting plate is avoided.

Referring to fig. 19 to 25 can be used to illustrate the fourth embodiment of the wall-mounted camera plate of the present invention, the camera plate includes a camera plate housing, a camera 2, a LED lamp bead 3, a sapphire glass 4, a fluidic device, a sidewall contact arm connector, a circuit board 7, a fixer 8, an optical fiber image transmission bundle 202, an objective 203, and a connection fitting. The camera shooting plate shell comprises a camera shooting plate front shell 101 and a camera shooting plate rear shell 102; the push arm connector comprises a main push arm connector 103 and a sub push arm connector 104; the fluidic device comprises a flow guide pipe connector 105, a nozzle 501 and a flow guide channel 502; the connection fitting comprises a sealing rubber ring 901, a nozzle sealing rubber ring 905, a sealing screw 902, a stud 903, a multi-core pressure-bearing sealing plug 904 and a lead 701.

Referring to fig. 20, 6

circular sapphire glasses

4 and 8 rectangular sapphire glasses 4 are hermetically mounted in an opening in the middle of the front surface of the camera board front case 101.

Referring to fig. 22, the front opening of the front case 101 of the camera board has a trapezoidal shape with a wide top and a narrow bottom. Accordingly, the cross section of the sapphire glass embedded in the front opening of the camera board housing is also trapezoidal in shape. The arrangement is to realize the sealing effect under the high-pressure environment through the boosting type self-sealing structure (refer to a high-temperature high-pressure micro-resistivity scanning imaging logging instrument polar plate with the patent application number of 99116390.7). A layer of sealing rubber ring is arranged between the sapphire glass 4 and the opening edge of the front shell 101 of the camera panel, and is used for realizing the sealing installation of the sapphire glass (not shown in the figure).

A disposable tempered glass film (not shown) is attached to the outer side surface of each sapphire glass 4 in an electrostatic adsorption manner, and the arrangement is to prevent the sapphire glass 4 from being worn. If the camera 2 observes that the toughened glass film is firstly broken, whether the logging operation is interrupted or not can be selected so as to attach the toughened glass film again. The front surfaces of the toughened glass film and the front shell of the camera shooting plate are coated with a layer of high-temperature-resistant oleophobic film. So set up, be sheltered from by the greasy dirt for placing the image acquisition passageway of camera, especially heavy oil.

Referring to fig. 22, the front surface of the front case 101 of the camera board and the sapphire glass 4 embedded therein are combined to form an arc shape; referring to fig. 24, the front surface of the camera board front case 101 and the sapphire glass 4 embedded therein are combined to form a straight line shape. The front surface of the camera plate front shell 101 embedded with the sapphire glass 4 is a cylindrical curved surface, which is arranged to be better fitted on a cylindrical well wall of a drilling well, as can be explained by combining fig. 22 and fig. 24.

Referring to fig. 22, the LED lamp bead 3 and the rear casing 102 of the camera board are fixed by gluing through a fixer 8, and the fixer 8 is a heat-conducting silica gel pad. So set up, be in order to make the heat that LED lamp pearl 3 self produced through the conduction silica gel pad conduction and scatter and disappear.

Referring to fig. 19 and 22, LED bead 3 is proximate to but not in contact with the inside surface of rectangular sapphire glass 4.

Referring to fig. 22 and 20, the camera head 2 is located in a recess 201 of the camera board rear case 102. An optical fiber image transmission bundle 202 is arranged above the camera 2, and an objective lens 203 is connected above the optical fiber image transmission bundle 202.

Referring to fig. 25, the objective lens 203 is close to the inner side surface of the circular sapphire glass 4.

Referring to fig. 25, the camera head 2, the optical image beam 202 and the objective lens 203 are wrapped and fixed by a bakelite skin 204. The bakelite sheath 204 and the groove 201 of the camera board rear shell 102 are fixed by gluing through the fixer 8, and the fixer 8 is a heat-conducting silica gel pad. So set up, in order to avoid camera 2 to receive the heat of sapphire glass 4 to the heat that produces camera 2 self passes through the heat conduction silica gel pad conduction and delivers to water conservancy diversion passageway 502.

The objective lens is a combination of a plurality of lenses, and is arranged to eliminate image distortion. The design method of the pre-objective lens of the optical fiber image transmission bundle can refer to the objective lens design of the miniature optical fiber image transmission bundle endoscope published in the journal of applied optics. The outer diameter of the lens of the camera 3 adopted in the embodiment is 1mm, and the total length is 3.5 mm. The minimum object distance of the camera 3 is 1mm, the depth of field is 1-50mm, and the visual angle is 70 degrees. The camera 3 adopts a CCD image sensor. Reference is made to the 1mm super-fine endoscope produced by reconnaissance equipment ltd for saint source police, quanzhou. It should be understood that the utility model discloses a camera 2 and LED lamp pearl 3 of board of making a video recording type, number and arrangement can change, do not influence the utility model discloses the implementation effect of device.

Referring to fig. 24, the circuit board 7 and the camera board rear case 102 are glued together by the fastener 8. The fixer 8 is a heat-conducting silica gel gasket. The circuit board 7 is located below the camera board front case 101, but does not contact the camera board front case 101. This is provided to dissipate heat generated by the circuit board 7 itself through the heat conductive silicone gasket and to transfer the heat to the camera board rear case 102. The circuit board 7 includes a power module, a digital signal processing module, a signal transmitting module, and the like. The power supply module is used for supplying power to the camera 2 and the LED lamp beads 3; the digital signal processing module comprises a digital signal processor and is used for processing photoelectric data received by an image sensor of the camera and carrying out network video coding; and the network high-speed transmission module transmits the data processed by the digital signal processing module to a computer on the earth surface through a data line. The technical features of this aspect can be referred to the device and method for acquiring downhole full-frame-rate color video through an armored logging cable of patent application No. 201710708245.3. The design of circuit board adopt completely with the utility model discloses irrelevant prior art, in order to accomplish succinctly, the utility model discloses other functional modules that circuit board related are no longer being repeated in description and claim.

Referring to fig. 20, a main push arm connector 103 and a guide duct connector 105 are welded to the left end of the camera board rear case 102; a sub push arm connector 104 is welded to the right end of the camera board rear case 102.

Referring to fig. 24, the main push arm connector 103 is a hollow stepped shaft of metal material and the secondary push arm connector 104 is two metal pin holes perpendicular to each other. The two connectors are used to connect the backup arms of the tool sidewall rams. This feature may be referred to in the art as a microresistivity imaging tool pad connector.

Referring to fig. 24, a multi-core pressure-bearing sealing plug 904 is threadably secured to the camera panel back housing 102. The lead 701 of the circuit board 7 is connected with one end of a multi-core pressure-bearing sealing plug 904 through a lead hole 702, and the other end of the multi-core pressure-bearing sealing plug 904 is connected with an external lead. The arrangement is such that the lead 701 can be connected to an external lead in a sealed environment.

Referring to fig. 20, a seal screw 902 is threaded through a prepared hole of the front camera plate case 101 and a stud 903, so that the front camera plate case 101 is correspondingly installed in an opening of the rear camera plate case 102. The sealing screw 902 is end face sealed, and a sealing groove is arranged on one side of the head of the sealing screw close to the thread. The sealing groove is internally provided with a sealing ring to ensure sealing (the technical characteristics are common prior art and are not shown in the figure). The contact portion between the edge of the camera panel rear case 102 and the edge of the camera panel front case 101 sandwiches a seal rubber 901.

The sealed chamber inside the camera board shell for mounting various electronic components is in a vacuum state. The method for realizing the vacuum state inside the shell of the camera shooting plate comprises two methods: the first method is that the sealing connection process of the camera panel rear shell 102 and the camera panel front shell 101 is performed in a vacuum environment; the second method is to add a getter having a function of absorbing various gases into the camera panel case. The two methods can also be used simultaneously. The prior art in this respect can refer to the research review of the application of the getter in the high vacuum heat insulation type low temperature container and the adsorption performance thereof, which is published in the journal of Chinese Special Equipment safety. So set up for the adiabatic principle on utilizing the vacuum layer, the heat of avoiding making a video recording board front shell 101 and sapphire glass 4 passes through air dielectric and transmits image sensor and the LED lamp pearl of circuit board, camera.

Referring to fig. 23, the flow tube connector 105 is made of a metal material and has a hollow tubular structure. The hollow interlayer of the camera plate rear shell 102 is used as a flow guide channel 502, and the flow guide pipe connector 105 is communicated with the flow guide channel 502. Three nozzles 501 are arranged above the flow guide channel 502. The outer side of the rear camera panel housing 102 is coated with a layer of aerogel coating (not shown) having a heat insulating function. So set up in order to cool down the camera board casing through water conservancy diversion passageway 502 to avoid external high temperature environment to give LED lamp pearl, camera and circuit board through camera board casing transmission heat. Reference is made in the prior art to a water-cooled protective cover for an industrial camera, which is disclosed in patent application No. 201911164386.9.

Referring to fig. 23 and 20, three nozzles 501 on the rear camera plate case 102 are correspondingly snapped together with three openings of the front camera plate case 101, and a nozzle sealing rubber ring 905 is sandwiched between the contact portions of the edge of the nozzles 501 and the edge of the front camera plate case 101. This is provided to seal the front camera plate case 101 and the rear camera plate case 102.

Referring to fig. 19, the nozzle 501 has a long bar shape. The arrangement is that in the process of making the logging instrument do slow uniform motion upwards, the transparent well-flushing liquid sprayed by the nozzle 501 above the sapphire glass 4 can flow upwards and downwards in a laminar flow mode, and turbid slurry between the sapphire glass 4 and the well wall is fully discharged.

In some embodiments, the LED beads 3 are not proximate to the inside surface of the sapphire glass 4. LED lamp pearl 3 that is located the inside of board casing of making a video recording is connected to leaded light optic's one end, and sapphire glass 4's medial surface is pressed close to leaded light optic's the other end. So set up in order to make LED lamp pearl 3 avoid receiving the heat that sapphire glass transmitted, LED lamp pearl 3 can see through sapphire glass 4 through the light guide fiber with the light that LED lamp pearl 3 sent and shine to the target area simultaneously.

Referring to fig. 26 and 27, the utility model provides a logging instrument, include the utility model discloses a board 10, logging instrument backbone 11, mud cake scraper 12, sidewall contact 13, a pair of backup arm 1301, water pipe crossover head 14, cable connector 15, logging cable 16, total honeycomb duct 17, branch honeycomb duct 1701, centralizer 21 make a video recording. The centralizer 21, the sidewall contact 13 and the mud cake scraper 12 are all installed on the logging instrument backbone 11, wherein the centralizer 21 is located at the lower part of the logging instrument backbone 11, the sidewall contact 13 is located at the middle part of the logging instrument backbone 11, and the mud cake scraper 12 is located at the upper part of the logging instrument backbone 11; the cable connector 15 and the water pipe conversion head 14 are arranged at the top end of the logging instrument backbone 11; the sidewall contact device 13 comprises 2 pairs of backup arms 1301, and one camera shooting plate 10 of the utility model is correspondingly connected with one pair of backup arms 1301; each pair of backup arms comprises a main backup arm and an auxiliary backup arm, the main backup arm is used for connecting the main backup arm connector 103 of the camera board 10, and the auxiliary backup arm is used for connecting the auxiliary backup arm connector 104 of the camera board 10; the water pipe adapter 14 is of a one-to-two structure, and the input end of the water pipe adapter is provided with a connector for connecting a main flow guide pipe 17; the output end is provided with two connectors (not shown in the figure), and the connector of one output end is correspondingly connected with a branch guide pipe 1701; the two branch guide pipes 1701 extend downwards outside the logging tool backbone 11 and are connected to the two guide pipe connectors 105 of the camera plate 10 in a one-to-one correspondence. The cable connector 15 is used to connect a logging cable 16.

In some embodiments, the sidewall contact 13 includes 8 pairs of contact arms, and 8 camera panels 10 of the present invention are correspondingly installed. The input end of the water pipe conversion head 14 is a connector, and the output end is 8 connectors. The input end is connected with the main draft tube 17, and the 8 connectors of the output end are connected with the 8 branch draft tubes 1701 in a one-to-one corresponding mode. The 8 branch guide pipes extend downwards outside the base stem of the logging instrument and are respectively connected with the guide pipe connectors 105 of the 8 camera boards 10 in a one-to-one correspondence manner.

In some embodiments, the logging cable 16 employed by the tool of the present invention is a fiber optic logging cable.

Compare the polar plate of little resistivity formation of image logging instrument among the prior art, the utility model discloses a shape of making a video recording the board is asymmetric, probably causes the unable closure of backup pad when making a video recording board installation number is too much, in order to solve this problem, 1-3 boards of making a video recording can only be installed to the logging instrument. When the diameter of the measured borehole is larger, 8 camera plates can be mounted on the 8-arm sidewall contact device. Install on the sidewall contact device the utility model discloses a closed problem is not a problem that can not solve in the board of making a video recording can draw in completely, and this is a problem that involves the board geometry of making a video recording, can improve in follow-up research, the utility model discloses the content does not relate to the research in this aspect.

In some embodiments, the sidewall contact device is a swinging sidewall contact device with a slide block limiting device, and the arrangement is to enable a camera board arranged on the backup arm to better adapt to the condition of uneven well wall.

In some embodiments, the sidewall contact is an umbrella sidewall contact, and is configured to provide additional stability to a camera panel mounted on the sidewall contact.

The swinging sidewall contact device and the umbrella sidewall contact device can be referred to an article which is published in the journal petroleum mine machinery and is entitled "review of structure of sidewall contact device of common logging instrument".

It should be understood that the utility model discloses a quantity of the backup arm of the sidewall contact device of logging instrument and the camera board of installation above that can change does not influence the utility model discloses the implementation effect of device.

In some embodiments, the design of the mudcake clearer refers to a sidewall scraper of patent application No. 201520850066. X.

In some embodiments, the mudcake clearer design is referred to in the patent application No. 201720578128.5 as a sidewall scraper.

In some embodiments, the design of the mudcake clearer is referred to an oversized mudcake remover, patent application No. 201621106196.3.

Referring to fig. 27, a method of using a logging tool of the present invention includes the steps of:

step one, will through logging cable 16 the utility model discloses a logging instrument is transferred to the pit shaft in. The length of the total flow guide 17 connected to the logging instrument is greater than that of the logging cable 16 so as to avoid being pulled apart;

and step two, when the logging instrument reaches the bottom of the shaft, the centralizer 21 of the logging instrument opens the pushing arm and enables the pushing arm to be supported on the wall of the shaft, and the logging instrument is stably located at the central position of the shaft. The sidewall contact 13 of the logging instrument opens the backup arm 1301, so that the camera plate 10 of the utility model mounted on the backup arm 1301 can be close to the well wall 18;

step three, the logging cable 16 draws the logging instrument of the utility model to do slow uniform motion upwards; the mud cake scraper 12 scrapes off mud cakes attached to the well wall 18;

fourthly, the camera board 10 of the utility model sprays the transparent well-washing liquid 20, thereby the turbid mud 19 between the camera board 10 and the well wall 18 is discharged and the residual mud cake possibly existing on the well wall 18 is removed;

and step five, the camera board 10 shoots images of the well wall 18 and transmits the data to a computer on the earth surface through the logging cable 16.

In some embodiments, the tool remains stationary for purposes of focusing on some intervals, so that the camera pad 10 of the present invention can repeatedly take high resolution images and transmit the data to a computer located at the surface via the logging cable 16.

In some embodiments, the transparent flushing fluid 20 injected into the flow manifold 17 at the surface contains a large amount of ice to avoid excessive temperature rise of the transparent flushing fluid 20 during downhole transportation.

The more smooth the well wall 18 is, the more beneficial the normal use of the camera board 10 of the present invention is, and therefore it is preferable to adopt some drilling processes to polish the well wall 18 smooth, even. When the wall of a well is very uneven, the utility model discloses a camera board 10 also can be under the circumstances of keeping static, shoots the image of the wall of a well 18 through spouting a large amount of transparent well-flushing liquid 20.

Claims

1. A well wall-sticking type camera board comprises a camera board shell, at least one camera (2), at least one LED lamp bead (3) and sapphire glass (4); the sapphire glass (4) is embedded in the opening on the front surface of the shell of the camera shooting plate in a sealing way; the LED lamp bead (3) and the camera (2) are positioned inside the shell of the camera board, and the LED lamp bead is characterized by also comprising a guide pipe connector (105) used for connecting a branch guide pipe (1701); not less than one nozzle (501) having a function of spraying the transparent well-flushing fluid (20); a main push arm connector (103) and a sub push arm connector (104) for connecting the push arms (13); the main push arm connector (103) and the guide pipe connector (105) are positioned at the top of the camera board shell, and the auxiliary push arm connector (104) is positioned at the bottom of the camera board shell; the guide pipe connector (105) is connected with the nozzle (501) through a guide passage (502), and the nozzle (501) is positioned on the front surface of the camera shooting plate shell; the minimum object distance of the camera (2) is not more than 50 mm.

2. The close-well type camera plate according to claim 1, further comprising a distance-limiting guide plate (6) having a function of limiting the distance between the camera plate (10) and the well wall (18); the distance-limiting guide plate (6) is positioned on the front surface of the camera shooting plate shell.

3. The imaging plate of claim 1, wherein the imaging plate housing comprises a hollow interlayer as a flow guide channel (502) for the transparent flushing fluid (20).

4. The camera plate against the borehole wall of any one of claims 1 to 3, wherein a sealed chamber for mounting various electronic components inside the camera plate housing is in a vacuum state.

5. The close-fitting borehole wall type camera plate according to any one of claims 1 to 3, wherein a nozzle (501) having a function of removing the borehole wall mud cake by means of jet flow is provided at the top end of the front face of the camera plate housing.

6. The close-well type camera plate according to any one of claims 1 to 3, further comprising an optical fiber image transmission bundle (202) and an objective lens (203); one end of the optical fiber image transmission bundle (202) is connected with the camera (2), and the other end of the optical fiber image transmission bundle (202) is connected with the objective lens (203); the objective lens (203) is close to the inner side surface of the sapphire glass (4).

7. The imaging plate for close-well according to any one of claims 1 to 3, wherein the front face of the imaging plate housing has a nozzle (501) for washing the sapphire glass (4).

8. The camera plate against the borehole wall of any one of claims 1 to 3, further comprising a light guide fiber; LED lamp pearl that is located the inside of board casing of making a video recording is connected to light guide fiber's one end, and sapphire glass (4)'s medial surface is pressed close to light guide fiber's the other end.

9. A logging tool, characterized in that it comprises not less than one wall-mountable camera plate (10) according to any one of claims 1 to 8, a logging tool backbone (11), a mud cake scraper (12), a sidewall contact device (13), not less than one pair of sidewall contact arms (1301), a water pipe conversion head (14), a cable connector (15), a logging cable (16), a main flow guide pipe (17), not less than one branch flow guide pipe (1701), and a centralizer (21); the centralizer (21) is positioned at the lower part of the logging instrument backbone (11); the sidewall contact device (13) is positioned in the middle of the logging instrument backbone (11); the mud cake scraper (12) is positioned at the upper part of the logging instrument backbone (11); the cable connector (15) and the water pipe conversion head (14) are positioned at the top end of the logging instrument backbone (11); the sidewall contact device (13) comprises at least one pair of backup arms (1301), and the pair of backup arms (1301) is correspondingly connected with a wall-contact type camera shooting plate (10); the input end of the water pipe conversion head (14) is a connector which is used for connecting a main guide pipe (17); the output end of the water pipe conversion head (14) comprises at least one connector, and the connector of one output end is correspondingly connected with a branch guide pipe (1701); the other end of each branch guide pipe (1701) extends downwards outside a logging instrument backbone (11) and is connected with the well wall-attaching type camera boards (10) in a one-to-one correspondence mode; the cable connector (15) is used for connecting a logging cable (16).

10. A logging tool according to claim 9, wherein the walls of the main flow duct (17) comprise a layer of insulation consisting of a heat insulating material.