DOWNHOLE PIPE DISCONNECTOR (VERSIONS) Russian patent published in 2024 - IPC E21B17/06 

FIELD: oil, gas and coke-chemical industry.

SUBSTANCE: group of inventions relates to oil and gas industry. Downhole pipe disconnector comprises a casing in the form of a pipe with a stepped axial hole, in the upper stage of which there is a left cylindrical thread. Middle stage is smooth. Annular ledge is made in lower stage. Nut with left-hand cylindrical thread, in the hole of which splines are made, is connected to the housing. Above the housing there is a bushing, in the axial hole of which there are splines. Bearing pipe, which lower stage of larger diameter is arranged in the middle stage of the housing with possibility of rotation and longitudinal movement. Middle stage of smaller diameter interacts by splines with the nut with the possibility of longitudinal movement and the bushing with the possibility of longitudinal movement and rotation in the lowermost position of the bearing pipe. Spring is installed on the upper stage of the load-carrying pipe between the upper coupling and the bushing. Torque transfer function deactivation unit contains annular ledge in lower stage of axial hole of housing, which interacts with end of lower stage of bearing pipe in its extreme lower position, at which splines of its middle stage and splines of bushing are disconnected. Axial bore of the bushing is made as stepped, the smooth passage upper stage of smaller diameter interacts with the upper stage of the bearing pipe. Splines of the bushing are made in the middle step of the axial hole larger diameter. Deactivation unit elements fixation unit in deactivation position comprises a split ring, which is installed in annular groove made in upper smooth passage step of axial hole of bushing and which interacts in extreme lower position of bearing pipe with annular groove made on upper step of bearing pipe between bushing and upper coupling. Version of a downhole pipe disconnector is disclosed.

EFFECT: higher reliability of disconnector.

2 cl, 10 dwg