A post-turbine anti-contamination camera nipple and downhole camera
A camera, anti-contamination technology, used in construction and other directions, can solve the problems of economical operation cost and not widely promoted
Active Publication Date: 2018-02-02
PETROCHINA CO LTD
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Problems solved by technology
Fiber Optic can obtain real-time continuous images of 30 images per second, and the image size is also the largest, and can obtain the best downhole image data, but due to the physical characteristics of optical fibers and light wave transmission characteristics, it has not been widely promoted; Hawkeye Ⅱ Although the image is not as good as the optical fiber video system can provide continuous moving high-definition, high-fidelity images, but it uses ordinary single-core logging cable to replace the original optical fiber, and the operating cost is economical
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Embodiment Construction
[0025] The present invention provides a rear turbine anti-contamination type camera short joint, which has: a housing, one end of the housing is a camera end, a sealed camera is accommodated in the housing and located at the camera end, The other end of the housing is the connecting end of the centralizer, and a sealed electrical channel is provided inside the short joint of the camera, and the electrical circuit of the camera passes through the electrical channel to be electrically connected with the external control equipment; a turbine drive mechanism, It is arranged in the short joint of the camera and is located between the connecting end of the camera and the centralizer; the turbine drive mechanism has a rear turbine and a driving device capable of driving the rear turbine to rotate, and the rear The turbine is located on the side close to the camera; a clear water liquid column cavity is arranged at the camera end of the short joint of the camera, and the clear water li...
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The invention provides an anti-staining type camera short piece with a rear turbine and an underground photography instrument, and is applicable to the field of oil well underground testing. The underground photography instrument at least comprises a cable head, a centering guide and a camera short piece which are sequentially connected to one another hermetically; a clear water liquid column cavity is formed in one side, which corresponds to a camera lens, of the camera short piece; a turbine driving mechanism is also arranged in the camera short piece and is provided with the rear turbine and a driving device capable of driving the rear turbine to rotate; the rear turbine is positioned on the side, which is close to a camera, of the turbine driving mechanism; a filtering hole zone is also arranged on a peripheral wall of the camera short piece; and the rear turbine can suck liquid on the outside of the camera short piece into the camera short piece via the filtering hole zone and then pumps the liquid to the clear water liquid column cavity, so that a clear water liquid column is formed at the front end of the camera lens, and oil stain, impurities and the like are prevented from staining the camera.
Description
technical field [0001] The invention relates to the technical field of petroleum well logging, and relates to a camera nipple and a downhole camera for real-time observation of downhole conditions and obtaining clear downhole image data. Background technique [0002] The downhole camera is a test instrument that uses a visible light camera to view oil, gas, and water wells. Through this instrument, the casing damage, casing dislocation, downhole falling objects, perforation quality, and water injection effective direction of the measured well can be directly observed. Condition. At present, the downhole camera is mainly used in civil water well monitoring. Due to the insufficient temperature and pressure resistance of the instrument, it is rarely used in the downhole detection of oil wells in oil fields, and the contamination of the camera lens is rarely considered. In the field of downhole TV logging abroad, Fiber Optic (optical fiber), Hawkeye Ⅰ (coaxial cable), and Hawke...
Claims
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IPC IPC(8): E21B47/002
Inventor 何金宝杨志祥张福兴杨清玲邹杨冯紫薇乔沐周毅青
Owner PETROCHINA CO LTD