Sand-loosening type petroleum downhole safety connector
A technology for safety joints and oil wells, which is applied in drilling equipment, wellbore/well components, earth-moving drilling, etc. to prevent overhaul of oil wells and improve the structure.
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[0019] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0020] The sand-loosing oil well downhole safety joint mentioned in the present invention has a technical solution: it includes an upper joint (1) and a lower joint (2), and a lower joint (2) is connected to the lower part of the upper joint (1). A sealing steel sleeve (5) is set on the outer side of the upper joint (1), and the sealing steel sleeve (5) is fixedly connected with the lower joint (2). There is a shear ring (4), and a safety shear nail (3) is arranged on the upper part of the shear ring, and is connected with the groove on the outer wall of the upper joint (1) through the safety shear nail (3); the sealing steel sleeve (5) is connected with the upper jo...
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