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Oil injection valve and oil injection structure of hydraulic system

A technology of oil injection structure and oil injection valve, which is applied in the direction of fluid pressure actuated system components, valve operation/release device, lift valve, etc., which can solve the problems of hydraulic system damage, undersaturation, low air content of hydraulic oil, etc., and achieve convenient The effect of rotation

Inactive Publication Date: 2015-05-20
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

[0002] In petroleum downhole instruments, the gas in the hydraulic system has always been an important factor that plagues the stability of the hydraulic system of the instrument. In order to improve the rigidity and stability of the hydraulic system, the air bubbles in the system are generally eliminated by prolonging the time of vacuuming and circulating oil injection, but After the oil filling is completed, the oil filling joint is generally removed. After a long time of vacuuming, the air content of the hydraulic oil is extremely low, and it is seriously undersaturated. The moment it contacts the air, a large amount of air will melt into the hydraulic oil, thereby reducing the hydraulic pressure. The rigidity and stability of the system, this hazard will be highlighted in the state of high pressure and high temperature, causing serious damage to the hydraulic system

Method used

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  • Oil injection valve and oil injection structure of hydraulic system
  • Oil injection valve and oil injection structure of hydraulic system
  • Oil injection valve and oil injection structure of hydraulic system

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Embodiment Construction

[0026] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0027] Such as figure 1 and figure 2 As shown, an oil injection valve includes a valve body 1 and a valve core 2, the valve body 1 is cylindrical, the outer wall of the valve body 1 is provided with an external thread for screwing with a hydraulic instrument, and the shape of the outer wall of the valve body 1 is the same as The shape of the oil connection port of the hydraulic instrument is matched. The front end of the outer wall of the valve body 1 is square, which is convenient for the rotation of the valve body 1 during installation. The valve body 1 is provided with a...

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Abstract

An oil injection valve comprises a valve body and a valve element. A cavity with an upward opening is arranged in the valve body. An oil injection hole is formed in the bottom of the cavity. The valve element is connected into the cavity in a threaded manner. The bottom of the valve element is provided with a protrusion and an oil outlet. The protrusion is in close contact with the oil injection hole. An oil injection pipe accommodating groove is formed in the valve element. The oil outlet is communicated with the oil injection pipe accommodating groove. By the oil injection valve, air can be prevented from invading into a hydraulic system during oil injection pipe demounting, and hydraulic system stability is increased.

Description

technical field [0001] The invention relates to an oil injection valve and an oil injection structure of a hydraulic system. Background technique [0002] In petroleum downhole instruments, the gas in the hydraulic system has always been an important factor that plagues the stability of the hydraulic system of the instrument. In order to improve the rigidity and stability of the hydraulic system, the air bubbles in the system are generally eliminated by prolonging the time of vacuuming and circulating oil injection, but After the oil filling is completed, the oil filling joint is generally removed. After a long time of vacuuming, the air content of the hydraulic oil is extremely low, and it is seriously undersaturated. The moment it contacts the air, a large amount of air will melt into the hydraulic oil, thereby reducing the hydraulic pressure. The rigidity and stability of the system, this hazard will be highlighted in the state of high pressure and high temperature, causi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K1/38F16K31/60F16K1/32F15B21/00
CPCF16K1/00F15B21/00F16K1/32F16K1/38F16K31/60
Inventor 张玉霖菅志军卢华涛王兴赵宏图孙龙飞
Owner CHINA NAT OFFSHORE OIL CORP
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