FIELD: oil and gas mining.
SUBSTANCE: flying valve for free piping contains tubular frame with separated element in form of rotation body and separated element block stop. Block stop is ring-shaped with diameter less than inner diameter of tubular frame. Ring block stop wall thickness is increased in direction of separated element, upper and lower edges of ring block stop are rounded. Block stop can be made as sole part with tubular frame and connected with two and more locks. Block stop can present the separate part with no less than two ledge-plungers pins. At that time tubular frame is made of flexible elastic material and in its wall holes are made, with similar form as block stop ledge-plunging pins. Besides, ledge-plunger pins come into holes of tubular frame.
EFFECT: lifting of liquid from hole in broad range of effective pressure and operating expenses of gas and liquid.
6 cl, 10 dwg
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