CN217518636U

CN217518636U - Antifouling formula instrument of making a video recording in pit

Info

Publication number: CN217518636U
Application number: CN202121538019.3U
Authority: CN
Inventors: 许剑; 倪杰; 杜洋; 赵华; 李玲; 黄万书; 郭莉霞; 付先惠
Original assignee: China Petroleum and Chemical Corp; Sinopec Southwest Oil and Gas Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Southwest Oil and Gas Co
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-09-30
Anticipated expiration: 2031-07-07

Abstract

The utility model provides an antifouling formula is instrument of making a video recording in pit, including the urceolus, be provided with airtight cavity in the urceolus, be provided with electronic motherboard in the cavity; the camera is arranged in the outer barrel and connected with the electronic mainboard, and transmits the recorded image information to the electronic mainboard and stores the image information into the electronic mainboard; the anti-fouling cover is arranged at the end part of the outer cylinder, shields the camera when closed, and exposes the camera when opened; wherein, the anti-fouling cover is in a closed state in a normal pressure state and is opened in a downhole high-pressure state. The utility model discloses can just open the camera lens at the assigned position and begin to make a video recording, prevent effectively that the camera from being adhered to by the greasy dirt, improve imaging.

Description

Antifouling formula instrument of making a video recording in pit

Technical Field

The utility model relates to an antifouling formula instrument of making a video recording in pit belongs to the oil and gas exploitation field.

Background

The underground camera shooting is a novel optical logging technology developed in recent years, the inner wall of a shaft is shot by using an underground camera shooting lens under the illumination of a light source, the damage condition of the inner layer of an underground oil pipe or a casing pipe can be monitored visually, meanwhile, underground accident investigation and fish falling fishing work can be assisted, and the application prospect in the field of petroleum and gas development is wide.

And a large amount of oil stains, wax, screw thread oil, foam discharging emulsion and other dirt exist in a natural gas well, and a lens can be polluted in the process of lowering the underground camera tool, so that the imaging effect is poor, and the application of the underground camera tool is greatly limited.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that exists among the prior art, the utility model provides an antifouling formula instrument of making a video recording in pit can just open the camera lens at the assigned position and begin to make a video recording, prevents effectively that the camera from being adhered to by the greasy dirt, improves the imaging.

The utility model provides an antifouling formula instrument of making a video recording in pit, include:

the electronic device comprises an outer barrel, wherein a closed cavity is arranged in the outer barrel, and an electronic mainboard is arranged in the cavity;

the camera is arranged in the outer barrel and connected with the electronic mainboard, and transmits the recorded image information to the electronic mainboard and stores the image information into the electronic mainboard; and

the anti-fouling cover is arranged at the end part of the outer cylinder, shields the camera when closed, and exposes the camera when opened;

wherein, the anti-fouling cover is in a closed state in a normal pressure state and is opened in a downhole high-pressure state.

The utility model is further improved in that the anti-fouling cover comprises a connecting cylinder connected with the outer cylinder and two opposite anti-fouling covers arranged on the connecting cylinder;

the front end of the connecting cylinder is provided with an air storage cavity, and the antifouling cover is provided with a piston inserted in the air storage cavity; when the pressure in the air storage cavity is higher than the external pressure, the piston extends out under the action of the internal pressure, so that the anti-fouling cover is closed; when the pressure in the air storage cavity is smaller than the external pressure, the piston retracts under the action of the external pressure, so that the anti-fouling cover is opened.

The utility model discloses a further improvement lies in, be provided with the gas injection hole on the outer wall of gas storage chamber, when initial state, through the gas injection hole to fill into a certain amount of gas in the gas storage chamber, make there is certain pressure in the gas storage chamber.

The utility model discloses a further improvement lies in, the tip in gas storage chamber is provided with the packing, thereby the packing through the extrusion of pressing the cap and the inflation with the piston seal slides and links to each other.

The utility model discloses a further improvement lies in, the inside cover of urceolus is equipped with the inner tube, the front end of inner tube is provided with a camera installation section of thick bamboo, camera fixed mounting be in the camera installation section of thick bamboo.

The utility model discloses a further improvement lies in, the front end of inner tube is provided with the illumination installation cavity, the illumination installation cavity sets up the camera installation section of thick bamboo with between the urceolus, wherein, be provided with the light in the illumination installation cavity.

The utility model is further improved in that the rear end of the lighting installation cavity is provided with a lamp wire hole, and a lamp wire of the lighting lamp passes through the lamp wire hole to be connected with the electronic mainboard; the front end of the illumination installation cavity is provided with first high-pressure-resistant glass.

The utility model discloses a further improvement lies in, the outside of camera be provided with the camera shell that the camera installation cavity links to each other, the front end of camera shell is provided with the resistant high pressure glass of second, the resistant high pressure glass of second passes through the upper gland to be fixed on the camera shell.

The utility model discloses a further improvement lies in, the urceolus with between the inner tube camera installation section of thick bamboo with between the camera shell the inner tube with between the first high pressure resistant glass and the camera shell with all be provided with 0 type sealing washer between the second high pressure resistant glass.

The utility model discloses a further improvement lies in, the rear end of urceolus is provided with and is used for the joint that links to each other with steel wire operation car or cable operation car.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses an antifouling formula instrument of making a video recording in pit can just open the camera lens at the assigned position and begin to make a video recording, prevents effectively that the camera from being adhered to by the greasy dirt, improves the imaging. When initial condition, antifouling cover is in the state of closing, and it shelters from and protects the camera, avoids going into the in-process camera in the pit and is infected with dirty. When the downhole tool is lowered to a predetermined position, the anti-fouling cover is opened under downhole pressure to expose the camera. At this time, the camera can take a picture of the downhole environment.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of an anti-fouling downhole camera tool according to an embodiment of the present invention, showing a state where an anti-fouling cover is closed;

fig. 2 is a schematic structural view of an anti-fouling downhole camera tool according to an embodiment of the present invention, showing a state when an anti-fouling cover is opened;

fig. 3 is a schematic structural view of a dirt protector according to an embodiment of the present invention;

FIG. 4 is a front view of the dirt protector of an embodiment of the present invention, shown in an open position;

fig. 5 is a front view of the dirt protector according to the embodiment of the present invention, showing a closed state.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

The meaning of the reference symbols in the figures is as follows: 1. the outer cylinder, 2, the camera, 3, antifouling cover, 11, the cavity, 12, the electron mainboard, 13, the inner tube, 14, the camera installation section of thick bamboo, 15, the illumination installation cavity, 16, the light, 17, first high pressure resistant glass, 18, the lamp hole, 19, connect, 21, the camera shell, 22, the high pressure resistant glass of second, 23, go up the gland, 31, the connecting cylinder, 32, antifouling lid, 33, the gas storage chamber, 34, the gas injection hole, 35, the piston, 36, the packing, 37, the pressure cap.

Detailed Description

In order to make the technical solutions and advantages of the present invention more clearly understood, the following description is made in further detail with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.

Fig. 1 schematically shows an anti-fouling downhole camera tool according to an embodiment of the present invention, which includes an outer barrel 1, where the outer barrel 1 is a cylindrical structure, and a moving space is provided inside the outer barrel 1 to form a closed cavity. An electronic main board 12 is arranged in the cavity. The electronic main board 12 is mounted with electronic devices including a control device, a power supply device, a memory, and the like, which are necessary devices for implementing an image pickup function. The camera 2 is arranged in the outer cylinder 1, the camera 2 is connected with the electronic main board 12, the recorded underground image information is transmitted to the electronic main board 12, and the influence information is stored in the electronic main board 12.

In this embodiment, the outer cylinder 1 is further provided with an antifouling cover 3 for protecting and preventing fouling of the camera 2. The anti-fouling cover 3 shields the camera 2 when closed, and exposes the camera 2 when opened. The anti-fouling cover 3 is in a closed state under a normal pressure state and is opened under a downhole high-pressure state. The high pressure here means a pressure state higher than the normal pressure, and the pressure at which the contamination prevention cover 3 can be opened can be manually adjusted, and the pressure is adjusted according to the downhole depth to be imaged. For example, in the case of clean water, the pressure will rise by 1MPa every 100m deep in the shaft, the pressure at the wellhead is 5MPa, and when the condition of the shaft 1000m below the wellhead needs to be observed, the opening high pressure can be 15 MPa.

Through the anti-fouling type downhole camera tool according to the embodiment, the downhole camera can be carried out, and in an initial state, as shown in fig. 1, the anti-fouling cover 3 is in a closed state and shields and protects the camera 2, so that the camera 2 is prevented from being polluted in the process of entering the downhole. When lowered to a predetermined position, the dirt protector 3 opens to expose the camera 2 under downhole pressure, as shown in figure 2. At this time, the camera 2 can take an image of the downhole environment.

In one embodiment, as shown in fig. 3, the dirt protector 3 includes a connector barrel 31 and a dirt preventive cover 32. The connecting cylinder 31 has a cylindrical structure, has a cylinder diameter matching that of the outer cylinder 1, and is connected to an end of the outer cylinder 1. The number of the soil-proof covers 32 is two, and they are respectively arranged oppositely. The front end of connecting cylinder 31 is provided with two gas storage chambeies 33, and gas storage chamber 33 corresponds the setting with antifouling lid 32, and an antifouling lid 32 sets up on a gas storage chamber 33.

In a preferred embodiment, the dirt cap 32 includes a cap body and a piston 35. The lid is the flaky structure, and two lids can be closed relatively, and the size after the closure is greater than camera 2's size. The piston 35 is a rod-shaped or strip-shaped structure and is inserted into the air storage cavity 33. In this embodiment, the air reservoir includes a radially disposed radial portion of its end, and an axially axial portion extending to the inside of the connecting cylinder 31, and the space in which the piston 35 of the stain-proof cover 32 moves is in the radial portion. The axial part is arranged to increase the volume of the air storage cavity, in practice, the volume of the air storage cavity is far larger than that of the piston 35, and the movement of the piston 35 has little influence on the pressure in the air storage cavity 33.

In the process of using the anti-fouling downhole camera tool according to the embodiment, when the pressure in the air storage cavity 33 is greater than the external pressure, the piston 35 is pushed to extend out from the air storage cavity 33 under the action of the internal pressure, and the piston 35 extends out to enable the two cover bodies to approach and contact together, so that the anti-fouling cover 32 is closed. When the pressure in the air storage cavity 33 is lower than the external pressure, the piston 35 retracts into the air storage cavity 33 under the action of the external pressure, and the two cover bodies are separated, so that the anti-fouling cover 32 is opened.

In one embodiment, a gas injection hole 34 is formed on the outer wall of the gas storage cavity, and in an initial state, a certain amount of gas is injected into the gas storage cavity 33 through the gas injection hole 34, so that a certain pressure exists in the gas storage cavity 33.

In the present embodiment, the gas-injection hole 34 is provided on the outer wall of the inner side of the gas storage chamber. The amount of gas injected into the gas injection holes 34 is determined based on the predetermined observed downhole location. Since the external pressure varies with the well depth during downhole, the pressure of the injection is determined by the pressure at the predetermined location. When the preset position is reached, the pressure in the outside is increased to be larger than the pressure in the air storage cavity, and the antifouling cover 32 is pushed to be separated under the action of the outside pressure, so that the antifouling cover 32 is opened.

In one embodiment, as shown in fig. 4 and 5, the end of the air storage chamber 33 is provided with a packing 36 and a pressing cap 37, the packing 36 is disposed at the opening of the end of the air storage chamber 33 between the pistons 35, fixed by the pressing cap 37, and expanded by the pressing of the pressing cap 37, so that the packing 36 is in sealed sliding connection with the pistons 35.

In one embodiment, as shown in fig. 1, the outer cylinder 1 is sleeved with an inner cylinder 13, and the inner cylinder 13 is arranged on the outer cylinder 1 at a position deviated to the front. The front end of inner tube 13 is provided with a camera installation section of thick bamboo 14, camera 2 fixed mounting be in the camera installation section of thick bamboo 14.

In a preferred embodiment, the front part of the inner cylinder 13 is provided with a radial annular end surface, the outer ring of the annular end surface is connected with the inner wall of the outer cylinder 1, and the inner ring of the annular end surface is connected with the mounting hole of the camera 2. The space behind the annular end face forms the cavity.

In one embodiment, the front end of the inner barrel 13 is provided with an illumination installation cavity 15, the illumination installation cavity 15 is arranged between the camera installation barrel 14 and the outer barrel 1, and an illumination lamp 16 is arranged in the illumination installation cavity 15. In the present embodiment, the lighting installation cavity 15 is a lamp groove surrounded by an annular end face of the front end of the inner cylinder 13, the outer cylinder 1 or the inner cylinder 13 located on the outer side, an installation hole of the camera 2 located on the inner side, and high-pressure resistant glass located on the front end. The illumination lamps 16 are arranged along the illumination installation cavity 15 in an annular circle.

When the anti-fouling downhole camera tool works, the illumination installation cavity 15 is circumferentially arranged outside the camera 2 to form an annular shape, so that illumination is more uniform. The illuminating lamp 16 provides light rays under the condition that no light is emitted underground, so that the illuminating condition is provided for the imaging of the camera 2, and the imaging is clearer.

In a preferred embodiment, a lamp wire hole 18 is formed at the rear end of the lighting installation cavity 15, and a lamp wire of the lighting lamp 16 passes through the lamp wire hole 18 to be connected with the electronic main board 12. The lamp wire hole 18 is formed in the annular end face, the lamp wire comprises a power wire and a control wire, the power wire provides electric energy for the illuminating lamp 16, and the control wire provides a control signal for the illuminating lamp 16 to control the opening and closing of the illuminating lamp 16. In this embodiment, the front end of the lighting installation cavity 15 is provided with a first high-pressure resistant glass 17. The high-pressure resistant glass is a transparent structure and is used for transmitting light; and can also withstand the high pressure environment downhole.

In one embodiment, a camera 2 housing connected with the camera 2 mounting cavity is arranged outside the camera 2, a second high-pressure-resistant glass 22 is arranged at the front end of the camera 2 housing, and the second high-pressure-resistant glass 22 is fixed on the camera 2 housing through an upper gland 23.

In a preferred embodiment, 0-type sealing rings are arranged between the outer cylinder 1 and the inner cylinder 13, between the camera mounting cylinder 14 and the outer shell of the camera 2, between the inner cylinder 13 and the first high-pressure resistant glass 17, and between the outer shell of the camera 2 and the second high-pressure resistant glass 22.

In one embodiment, the rear end of the outer cylinder 1 is provided with a connector 19 for connecting to a wire or cable work vehicle.

In a specific embodiment, the pressure of a well head of one well is 5MPa, clear water is in the well bore, and the condition of the well bore below 1000m of the well head needs to be observed. The wellbore pressure at 1000m was estimated to be 15 MPa. 15MPa high-pressure gas is filled into the gas storage cavity 33 from the gas injection port, and the antifouling cover 32 is in a closed state because the internal pressure is higher than the external pressure, so that the high-pressure resistant glass of the camera 2 is protected from dirt pollution. The tool is put into the shaft through the well testing equipment, when the setting depth exceeds 1000m, the external pressure exceeds 15MPa, the anti-fouling cover 32 is opened, and the underground camera 2 can normally shoot. After shooting is finished, the tool is lifted, when the tool is lifted to more than 1000m, the external pressure is less than 15MPa, and the anti-fouling cover 32 is closed to play a role in protecting the lens.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.

Claims

1. An anti-fouling downhole camera tool, comprising:

the device comprises an outer barrel (1), wherein a closed cavity is arranged in the outer barrel (1), and an electronic main board (12) is arranged in the cavity;

the camera (2) is arranged in the outer cylinder (1) and connected with the electronic main board (12), and the camera (2) transmits recorded image information to the electronic main board (12) and stores the recorded image information in the electronic main board (12); and

the anti-fouling cover (3) is arranged at the end part of the outer cylinder (1), and the camera (2) is shielded when the anti-fouling cover (3) is closed and exposed when the anti-fouling cover (3) is opened;

wherein, the anti-fouling cover (3) is in a closed state under a normal pressure state and is opened under a downhole high pressure state.

2. The tool according to claim 1, wherein the dirt protector (3) comprises a connecting cylinder (31) connecting the outer cylinder (1), and two opposing dirt caps (32) provided on the connecting cylinder (31);

the front end of the connecting cylinder (31) is provided with an air storage cavity (33), and the antifouling cover (32) is provided with a piston (35) inserted into the air storage cavity (33); when the pressure in the air storage cavity (33) is higher than the external pressure, the piston (35) extends under the action of the internal pressure, so that the antifouling cover (32) is closed; when the pressure in the air storage cavity (33) is lower than the external pressure, the piston (35) retracts under the action of the external pressure, so that the anti-fouling cover (32) is opened.

3. The tool according to claim 2, wherein a gas injection hole (34) is formed in an outer wall of the gas storage chamber (33), and a predetermined amount of gas is injected into the gas storage chamber (33) through the gas injection hole (34) in an initial state, so that a predetermined pressure is present in the gas storage chamber (33).

4. The antifouling downhole camera tool according to claim 3, wherein a packing (36) is provided at an end of the gas storage chamber (33), the packing (36) being expanded by pressing of a press cap (37) to be sealingly and slidably connected to the piston (35).

5. The tool according to any one of claims 1 to 4, wherein an inner cylinder (13) is sleeved inside the outer cylinder (1), a camera mounting cylinder (14) is arranged at the front end of the inner cylinder (13), and the camera (2) is fixedly mounted in the camera mounting cylinder (14).

6. The tool according to claim 5, wherein a lighting installation cavity (15) is provided at a front end of the inner cylinder (13), the lighting installation cavity (15) is provided between the camera installation cylinder (14) and the outer cylinder (1), and a lighting lamp (16) is provided in the lighting installation cavity (15).

7. The tool according to claim 6, wherein a lamp hole (18) is formed at the rear end of the lighting installation cavity (15), and a lamp wire of the lighting lamp (16) passes through the lamp hole (18) to be connected with the electronic main board (12); the front end of the lighting installation cavity (15) is provided with first high-pressure-resistant glass (17).

8. The anti-fouling downhole camera tool according to claim 7, wherein a camera (2) housing connected with the camera (2) mounting cavity is arranged outside the camera (2), a second high pressure resistant glass (22) is arranged at the front end of the camera (2) housing, and the second high pressure resistant glass (22) is fixed on the camera (2) housing through an upper gland (23).

9. The tool according to claim 8, wherein a 0-type seal ring is provided between the outer cylinder (1) and the inner cylinder (13), between the camera mounting cylinder (14) and the camera (2) housing, between the inner cylinder (13) and the first high pressure resistant glass (17), and between the camera (2) housing and the second high pressure resistant glass (22).

10. An antifouling downhole camera tool according to any of claims 6-9, wherein the rear end of the outer cylinder (1) is provided with a joint (19) for connection to a wireline or cable work vehicle.