Oil well logging instrument pressure balance pushing sleeve device
A technology for oil logging and pushing against the casing, which is used in surveying, wellbore/well components, and earth-moving drilling, etc., can solve problems such as breakage, the inability of the instrument to be pushed out normally, and affect the sliding of the casing, so as to ensure the sealing performance. Effect
Active Publication Date: 2017-01-25
WUHAN HAIWANG MECHANICAL & ELECTRICAL ENGTECH
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AI Technical Summary
Problems solved by technology
[0005] It will affect the sliding of the sleeve, causing the instrument to not be pushed open normally, and in severe cases, the instrument will be deformed or broken
Method used
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Embodiment Construction
[0030] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:
[0031] As shown in the figure, the pressure balance pushing sleeve device of the oil well logging instrument includes a guide pressure bearing shell 8, which is sequentially provided with a front opening 8.1 along the axial direction, a middle sealing member installation hole 8.2, and a rear opening. The first guide groove 8.3 radially penetrated, the tail seal mounting hole 8.4, and the rear end mounting seat 8.5. The end of the front opening 8.1 is sealed and connected with the rear end of the transitional pressure-bearing housing 6 through threads and sealing ring 14, and the transitional pressure-bearing housing 6 is provided with a pressure-bearing sealing plug with 19 wiring cores for isolating and sealing the front opening 8.1 7. The front end of the transitional pressure-bearing housing 6 is connected to the electrode system sleeve ...
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The invention discloses a pressure balance sleeve pushing device of a petroleum logging instrument. The pressure balance sleeve pushing device comprises a cylindrical guide pressure bearing shell, a sliding sleeve component and a movable sealing component, wherein the front end of the guide pressure bearing shell is connected with an electrode system sleeve; and the sliding sleeve component slides back and forth on the guide pressure bearing shell and the electrode system sleeve to enable a force transfer rod to open or close the underground petroleum logging instrument. A first pressure balance chamber and a second pressure balance chamber formed by sealing a transition pressure bearing shell with a pressure bearing sealing plug and a shell at the back end of the logging instrument are respectively arranged at the two ends of the guide pressure bearing shell, and are used for balancing the pressure of an axial balance rod and an axial thrust rod on the sliding sleeve component, so that the sliding sleeve component is not subjected to the resistance in the sliding process. The device is compact in structure, can maintain ideal pressure difference, is not influenced by a sealing pressure space, is convenient for wire arrangement, and can bear the underground high-temperature and high-pressure working conditions.
Description
technical field [0001] The invention relates to an auxiliary device in a petroleum logging instrument, in particular to a pressure balance pushing sleeve device of a petroleum logging instrument. Background technique [0002] At present, pushing the sleeve is applied in more and more logging instruments, and directly affects the logging effect. For the design of the push sleeve, many factors should be considered, such as reliability, wear resistance, high temperature resistance, corrosion resistance, and the sealing of the instrument, wiring and other issues. Among them, the structure of the push sleeve is a priority. In the oil well logging industry, a problem faced by all instruments and equipment is that as the depth of the oil well deepens, the downhole pressure and temperature will increase. After the pressure on the instrument is increased, the [0003] If the internal and external pressure difference is unbalanced, a huge pressure difference will be formed at the p...
Claims
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IPC IPC(8): E21B47/00
CPCE21B47/017
Inventor 刘情超周艳平李咸坤李伟
Owner WUHAN HAIWANG MECHANICAL & ELECTRICAL ENGTECH