Bottom hole flow bean adjustable by a pressure pulse
摘要
A ball check valve closes at the top of a hollow piston in a flow bean in response to a pressure puls from the surface. The piston is moved axially downward and a cross pin and inclined slot connection indexes a ratchet controlling an apertured disc so that a different size aperture is brought into coincidence with an offset flow port in the lower end of the bean.
申请公布号
DE2021129(A1)
申请公布日期
1971.11.11
申请号
DE19702021129
申请日期
1970.04.29
申请人
GOSUDARSTWENNIJ NAUTSCHNO-ISSLEDOWATEL'SKIJ I PROJEKTNIJ INSTITUT GIPROTJUMENNEFTEGAS
发明人
P. MAXIMOW,WLADIMIR;F. WOLKOW,LEONID;S. FOMIN,ALBERT;A. KARABANOW,ALEXANDR