Method for preventing oil stain adhesion of borehole television lens

Abstract

The invention discloses a method for preventing oil stain adhesion of a borehole television lens. The method comprises the following steps: (1) washing with clear water: washing the borehole television lens with clear water; (2) oil stain removal treatment: immersing the borehole television lens into a non-corrosive alkaline detergent solution for soaking; (3) washing with clear water: after soaking is completed, washing the surface of the drilling television lens with clear water; (4) coating an anti-adhesion material: uniformly coating the anti-adhesion material on the lens of the borehole television lens, the edge of the lens and the joint of the lens shell and the lens; and (5) processing the outer wall of the drilling television lens: uniformly smearing vaseline on the outer wall of the drilling television lens, so that the vaseline completely covers the outer wall of the drilling television lens from the top to the bottom. The technical problem that the imaging effect is affected due to the fact that a borehole television lens is prone to being adhered by oil dirt during observation inside a borehole can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of borehole television. Specifically, it is a method for preventing oil stain adhesion on the lens of a borehole television. Background Art

[0002] In downward drilling / grouting construction, after the construction is completed, it is often necessary to use a borehole television to observe the internal condition of the borehole. However, during the operation, the lens of the borehole television is prone to oil stain adhesion, resulting in a blurred field of view and the need for frequent lens cleaning, thus seriously affecting the operation efficiency. Therefore, it is necessary to perform anti-fouling treatment on the lens of the borehole television to reduce the risk of oil stain adhesion inside the borehole and improve the imaging effect of the internal observation of the borehole. Summary of the Invention

[0003] For this reason, the technical problem to be solved by the present invention is to provide a method for preventing oil stain adhesion on the lens of a borehole television, so as to solve the technical problem that the lens of the borehole television is prone to oil stain adhesion during the internal observation of the borehole, which affects the imaging effect.

[0004] To solve the above technical problem, the present invention provides the following technical solutions:

[0005] A method for preventing oil stain adhesion on the lens of a borehole television, comprising the following steps:

[0006] Step (1), rinsing with clear water: rinsing the lens of the borehole television with clear water to remove the particulate matter attached to the surface of the lens of the borehole television;

[0007] Step (2), removing oil stain treatment: immersing the lens of the borehole television in a non-corrosive alkaline detergent solution for soaking, so that the oil stain on the surface of the lens of the borehole television is fully emulsified and decomposed; the non-corrosive alkaline detergent solution in the present invention means that the alkaline detergent solution has no corrosiveness to the lens of the borehole television under the soaking conditions of the present invention;

[0008] Step (3), rinsing with clear water: after soaking, rinsing the surface of the lens of the borehole television with clear water to remove the remaining alkaline detergent solution and the emulsified oil stain;

[0009] Step (4), applying anti-adhesion material: evenly applying the anti-adhesion material on the lens, the edge of the lens and the connection between the lens housing and the lens of the borehole television to form a thin and uniform transparent protective film;

[0010] Step (5), treating the outer wall of the lens of the borehole television: evenly applying vaseline on the outer wall of the lens housing of the borehole television so that the vaseline completely covers from the top to the bottom of the outer wall of the lens housing of the borehole television.

[0011] The method for preventing oil stain adhesion on the borehole TV lens of the present invention can effectively prevent oil stain adhesion when lowering the downhole TV, extend the lens cleaning cycle, and greatly improve the imaging effect of the observation instrument.

[0012] In the above method for preventing oil stain adhesion on the borehole TV lens, in step (1), the borehole TV lens is rinsed with clean water at a temperature of 35 - 45°C. Rinsing the borehole TV lens with clean water at this temperature range can, on the one hand, improve the rinsing effect on particulate impurities such as dust and sand grains attached to the surface of the borehole TV lens, and on the other hand, preheat and soften the oil stains attached to the borehole TV lens, which is beneficial to improving the subsequent treatment effect of removing oil stains.

[0013] In the above method for preventing oil stain adhesion on the borehole TV lens, in step (2), the alkaline detergent solution is soapy water or washing powder water. Compared with washing powder water, soapy water has a better soaking and cleaning effect on the oil stains on the surface of the borehole TV lens, and has a lower corrosiveness to the borehole TV lens, which is suitable for cleaning precision equipment such as borehole TV cameras (optical lenses).

[0014] In the above method for preventing oil stain adhesion on the borehole TV lens, in step (2), the concentration of the alkaline detergent in the alkaline detergent solution is 0.3wt% - 1.2wt%; the temperature of the alkaline detergent solution is 30 - 40°C, and the soaking time is 5 - 15 min. Soaking with the alkaline detergent solution at this concentration at a temperature of 30 - 40°C for 5 - 15 min can fully emulsify and decompose the oil stains attached to the surface of the borehole TV lens, making them easy to rinse, and will not corrode the borehole TV lens and affect the service life of the lens.

[0015] In the above method for preventing oil stain adhesion on the borehole TV lens, in step (3), the borehole TV lens is rinsed with clean water at a temperature of 40 - 45°C. After the soaking is completed, rinsing the borehole TV lens with warm water at a temperature slightly higher than the soaking temperature of the alkaline detergent solution can wash away the emulsified and decomposed oil stains attached to the surface of the borehole TV lens, preventing the emulsified oil stains from increasing in viscosity during the rinsing process with clean water and reattaching to the surface of the borehole TV lens, resulting in incomplete oil removal.

[0016] For the method of preventing oil stain adhesion on the borehole TV lens, in step (4), the anti-adhesion material is transparent soap or vaseline. For the borehole TV lens, transparent soap has good lubricity and anti-adhesion performance, is easy to apply and clean, and is suitable for the anti-oil stain adhesion requirements of single downhole imaging. Vaseline has excellent lubricity, water resistance and anti-adhesion performance, is suitable for the anti-oil stain adhesion requirements of 2-5 times of downhole imaging, and is non-corrosive to the lens material. During construction operations, transparent soap or vaseline can be selected as the anti-adhesion material for the borehole TV lens according to requirements. When applying, control the relative humidity on the surface of the borehole TV lens to be 50-70%. Applying the anti-adhesion material within this humidity range, the anti-adhesion material has better affinity with the surface of the borehole TV lens. It is not only easier to evenly apply transparent soap or vaseline on the surface of the borehole TV lens to avoid uneven thickness, but also the protective film formed on the surface of the borehole TV lens has better stability and transparency, with a longer protection period and better imaging effect during construction operations.

[0017] For the method of preventing oil stain adhesion on the borehole TV lens, in step (4), the coating thickness of the anti-adhesion material on the lens surface is 0.2-0.4 mm, the coating thickness of the anti-adhesion material at the lens edge is 0.5-0.7 mm, and the coating thickness of the anti-adhesion material at the connection between the lens housing and the lens is 0.6-0.8 mm. The coating thickness of the anti-adhesion material not only affects the protection effect and protection period during the operation process, but also affects the imaging effect of the borehole TV lens. In the present invention, the coating thickness of the anti-adhesion material on the lens, at the lens edge and at the connection between the lens housing and the lens is controlled within the above range, which can not only obtain an ideal protection effect and improve the protection period of the borehole TV lens during the operation process, but also the coating of the anti-adhesion material will not have an adverse impact on the imaging effect of the borehole TV lens.

[0018] For the method of preventing oil stain adhesion on the borehole TV lens, in step (4), after the anti-adhesion material is applied, let it stand at room temperature for 4-6 h in an environment with a relative humidity of 40-60%. After standing under this condition, compared with just after application, the uniformity, stability and transparency of the protective film formed by the anti-adhesion material on the borehole TV lens have been significantly improved.

[0019] For the method of preventing oil stain adhesion on the borehole TV lens, in step (5), the coating thickness of vaseline on the outer wall of the lens housing of the borehole TV lens is 0.5-0.8 mm, which can not only effectively reduce the frictional resistance between its outer wall and the borehole wall during the lowering process of the borehole TV lens, but also prevent the oil stain in the borehole from adhering to the borehole TV lens through the contact between the outer wall of the borehole TV and the lens and affecting the observation effect.

[0020] For the method for preventing oil stain adhesion to the borehole television lens described above, in step (1), the borehole television lens is rinsed with clean water at a temperature of 45°C; in step (2), the alkaline detergent solution is soapy water; the concentration of the alkaline detergent in the alkaline detergent solution is 0.6 wt%; the temperature of the alkaline detergent solution is 30°C, and the soaking time is 10 min; in step (3), the borehole television lens is rinsed with clean water at a temperature of 40°C; in step (4), the anti-adhesion material is transparent soap; when applying, the relative humidity on the surface of the borehole television lens is controlled to be 60%; the coating thickness of the anti-adhesion material on the lens surface is 0.3 mm, the coating thickness of the anti-adhesion material on the lens edge is 0.5 mm, and the coating thickness of the anti-adhesion material at the connection between the lens housing and the lens is 0.8 mm; after the anti-adhesion material is applied, it is left standing at room temperature for 4 h in an environment with a relative humidity of 60%; in step (5), the coating thickness of vaseline on the outer wall of the lens housing of the borehole television lens is 0.8 mm.

[0021] The technical solution of the present invention has achieved the following beneficial technical effects:

[0022] (1) High-efficiency prevention of oil stain adhesion: Through a series of closely connected steps such as rinsing with clean water, soaking with soapy water to remove oil, and applying anti-adhesion material, the oil stain on the borehole television lens is prevented from multiple dimensions. First, impurities are removed, then the oil stain is emulsified, and finally a protective barrier is constructed, greatly reducing the possibility of oil stain adhesion to the borehole television lens inside the borehole, and effectively ensuring the imaging clarity of the borehole television lens during long-term observation operations inside the borehole.

[0023] (2) Significantly reducing the frictional resistance: After applying vaseline on the outer wall of the lens inside the borehole, the frictional resistance of the lens inside the borehole during operation in the borehole is greatly reduced. This not only reduces the wear of the lens and observation instruments inside the borehole, effectively extending the service life of the equipment, but also makes the observation operation smoother, significantly improving the work efficiency.

[0024] (3) Simple operation and low cost: The materials such as soapy water, transparent soap, and vaseline used in the present invention are all common and inexpensive items in daily life, and are easily accessible. The entire operation process does not require complex professional equipment and advanced professional skills, and is easy to be widely promoted and applied in various actual projects.

[0025] (4) The present invention selects an alkaline detergent solution with an appropriate concentration, and by controlling the soaking temperature and soaking time of the alkaline detergent solution, and using warm water with a temperature slightly higher than the soaking temperature to remove oil stains from the borehole TV lens, the cleaning effect and cleaning efficiency of the borehole TV lens can be significantly improved. It can not only effectively improve the imaging effect of the borehole TV lens, but also provide an ideal surface state for forming a protective film after coating the anti-adhesion material. When coating the anti-adhesion material, by controlling the coating thickness at different positions of the borehole TV lens, the relative humidity on the surface of the borehole TV lens during coating, and the static environment and static time after coating, the anti-adhesion material can form a uniform, stable and highly transparent protective film on the surface of the borehole TV lens. While significantly improving the protection effect and protection period of the protective film, it effectively reduces the impact of the protective film on the clarity of the borehole TV lens, thereby significantly improving the anti-fouling ability of the borehole TV lens and obtaining an ideal observation imaging effect throughout the entire operation process. Description of the Drawings

[0026] Figure 1 Schematic diagram of the structure of the downhole borehole TV camera in the embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the borehole TV lens after coating the anti-adhesion material in the embodiment of the present invention.

[0028] The reference numerals in the figure are represented as: 1 - lens; 2 - lens housing; 3 - anti-adhesion material. Detailed Embodiment

[0029] The method flow for preventing oil stain adhesion on the borehole TV lens in this embodiment is: rinsing with clean water - soaking in soapy water to remove oil stains - rinsing with clean water - coating the anti-adhesion material - treating the outer wall of the lens, which specifically includes the following steps:

[0030] (1) Rinsing with clean water: Before preparing to lower the observation instrument (downhole borehole TV camera, see Figure 1 ), use clean water to carefully rinse the borehole TV lens. This step aims to remove large-particle impurities such as dust and sand grains attached to the surface of the borehole TV lens, avoiding scratching and damaging the surface of the borehole TV lens by these impurities during subsequent processing, and providing a clean basis for subsequent anti-oil stain treatment. In this step, clean water with a temperature of 45°C is used to rinse the borehole TV lens. On the one hand, it can improve the rinsing effect, and on the other hand, it can preheat and soften the stubborn oil stains attached to the borehole TV lens, which is beneficial to improving the subsequent oil stain removal treatment effect;

[0031] (2) Degreasing treatment: Before lowering the observation instrument, prepare soapy water at a temperature of 30°C with a concentration of 0.6 wt%. Immerse the camera completely in the soapy water for 10 minutes. Under these treatment conditions, it can ensure that the oil stains on the surface of the borehole TV lens are fully emulsified and decomposed.

[0032] (3) Rinse with clean water: After soaking, take out the camera and slowly rinse the surface of the lens with clean water at a temperature of 40°C to remove the remaining soapy water and the emulsified oil stains; rinsing the surface of the borehole TV lens with clean water at a temperature higher than that of the soapy water can wash away the emulsified and decomposed oil stains attached to the surface of the borehole TV lens.

[0033] (4) Apply anti-adhesion material: Take an appropriate amount of transparent soap and apply it evenly on the surface of the lens to form a thin and uniform transparent soap film (see Figure 2 ). During the application process, control the relative humidity on the surface of the borehole TV lens to be 60%; and ensure that all parts of the lens, including lens 1, the edge of lens 1, and the connection between lens housing 2 and lens 1, are covered. After the anti-adhesion material 3 is applied, let it stand at room temperature for 4 h in an environment with a relative humidity of 60%; the application thickness of the anti-adhesion material 3 on the surface of lens 1 is 0.3 mm, the application thickness of the anti-adhesion material 3 on the edge of lens 1 is 0.5 mm, and the application thickness of the anti-adhesion material 3 at the connection between lens housing 2 and lens 1 is 0.8 mm.

[0034] (5) Treatment of the outer wall of the lens: For the outer wall of the borehole TV lens, use a brush or cotton swab to dip in vaseline and apply it evenly on the outer wall of the lens; the application thickness of vaseline is 0.8 mm; the application range should cover the entire area of the outer wall of the lens from top to bottom, which can ensure that during the process of lowering the lens, the frictional resistance between the outer wall and the borehole wall can be effectively reduced, and at the same time prevent the oil stains in the borehole from adhering to the lens through the contact between the outer wall and the lens.

[0035] Using the method for preventing oil stain adhesion of the borehole TV lens in this embodiment to perform the anti-oil stain adhesion treatment on the borehole TV lens can significantly improve the anti-fouling performance of the borehole TV lens. During the entire camera observation operation of a single well logging, the borehole TV lens can maintain an ideal imaging effect, and there is no need to interrupt the observation operation due to cleaning the lens in the middle.

[0036] In some other embodiments, it is also possible to choose to apply vaseline instead of transparent soap in step (4): Dip a clean cotton swab in vaseline and apply it gently on the surface of the lens, and also ensure that the application is uniform. The borehole TV lens treated by this method can meet the anti-oil stain adhesion requirements for 2 - 5 consecutive well logging camera operations.

[0037] Obviously, the above embodiments are merely examples given for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of the claims of this patent application.

Claims

1. A method for preventing oil stain adhesion on a borehole television lens, characterized in that, It includes the following steps: Step (1), rinsing with clean water: Rinse the borehole TV lens with clean water to remove the particulate matter adhering to the surface of the borehole TV lens. Step (2), degreasing treatment: Immerse the borehole TV lens in a non-corrosive alkaline detergent solution for soaking, so that the oil stains on the surface of the borehole TV lens are fully emulsified and decomposed. Step (3), rinsing with clean water: After soaking, rinse the surface of the borehole TV lens with clean water to remove the remaining alkaline detergent solution and the emulsified oil stains. Step (4), applying anti-adhesion material: Uniformly apply the anti-adhesion material (3) on the lens (1) of the borehole TV lens, the edge of the lens (1), and the connection between the lens housing (2) and the lens (1) to form a thin and uniform transparent protective film. Step (5), treating the outer wall of the borehole TV lens: Uniformly apply vaseline on the outer wall of the lens housing (2) of the borehole TV lens so that the vaseline completely covers from the top to the bottom of the outer wall of the lens housing (2) of the borehole TV lens.

2. The method for preventing oil stain adhesion on the borehole television lens according to claim 1, characterized in that, In step (1), rinse the borehole TV lens with clean water at a temperature of 35 - 45°C.

3. The method for preventing oil stain adhesion of a borehole TV lens according to claim 1, characterized in that, In step (2), the alkaline detergent solution is soapy water or washing powder water.

4. The method for preventing oil stain adhesion on the borehole television lens according to claim 3, characterized in that, In step (2), the concentration of the alkaline detergent in the alkaline detergent solution is 0.3wt% - 1.2wt%; the temperature of the alkaline detergent solution is 30 - 40°C, and the soaking time is 5 - 15 min.

5. The method for preventing oil stain adhesion on the borehole television lens according to claim 1, characterized in that, In step (3), rinse the borehole TV lens with clean water at a temperature of 40 - 45°C.

6. The method for preventing oil stain adhesion on the borehole television lens according to claim 1, characterized in that, In step (4), the anti-adhesion material (3) is transparent soap or vaseline; when applying, control the relative humidity on the surface of the borehole TV lens to be 50 - 70%.

7. The method for preventing oil stain adhesion on the borehole television lens according to claim 6, characterized in that, In step (4), the coating thickness of the anti-adhesion material (3) on the surface of the lens (1) is 0.2 - 0.4 mm, the coating thickness of the anti-adhesion material (3) on the edge of the lens (1) is 0.5 - 0.7 mm, and the coating thickness of the anti-adhesion material (3) at the connection between the lens housing (2) and the lens (1) is 0.6 - 0.8 mm.

8. The method for preventing oil stain adhesion on the borehole television lens according to claim 1, characterized in that, In step (4), after the anti-adhesion material (3) is applied, let it stand at room temperature for 4 - 6 h in an environment with a relative humidity of 50 - 70%.

9. The method for preventing oil stain adhesion on the borehole television lens according to claim 1, characterized in that, In step (5), the coating thickness of vaseline on the outer wall of the lens housing (2) of the borehole TV lens is 0.5 - 0.8 mm.

10. The method for preventing oil stain adhesion on the borehole TV lens according to claim 1, characterized in that, In step (1), rinse the borehole TV lens with clean water at a temperature of 45°C. In step (2), the alkaline detergent solution is soapy water; the concentration of the alkaline detergent in the alkaline detergent solution is 0.6wt%; the temperature of the alkaline detergent solution is 30°C, and the soaking time is 10 min. In step (3), rinse the borehole TV lens with clean water at a temperature of 40°C. In step (4), the anti-adhesion material (3) is transparent soap; during application, the relative humidity on the surface of the borehole TV camera lens is controlled to be 60%; the coating thickness of the anti-adhesion material (3) on the surface of the lens (1) is 0.3 mm, the coating thickness of the anti-adhesion material (3) at the edge of the lens (1) is 0.5 mm, and the coating thickness of the anti-adhesion material (3) at the connection between the lens housing (2) and the lens (1) is 0.8 mm; after the anti-adhesion material (3) is applied, it is left standing at room temperature for 4 h in an environment with a relative humidity of 60%; In step (5), the coating thickness of vaseline on the outer wall of the lens housing (2) of the borehole TV camera lens is 0.8 mm.

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