DEVICE FOR EQUIPMENT RUN IN WELL EQUIPPED WITH LINER Russian patent published in 2015 - IPC E21B33/14 E21B17/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to drilling equipment, namely to device for equipment running in the well with liner, that was lowered and cemented using the device with left hand disconnector (with LH thread), and is intended for works in the well, for example, hydraulic fracture, other chemicals injection in the production reservoir or for other works. The device for the equipment running in the well with liner contains a transportation sub and nut with thread connected by spline joint, devices for connection with drilling pipes at one side, and with liner at other side, and disconnection assembly made with possibility of the end face unloading in the support bearing, and with possibility of rotation during disconnection. The nut is made as split nut, comprising spring-loaded rams, that have possibility of limited synchronous radial and axial movement over splines on the transporting sub. The nut axial movement is limited by stops. The rams and funnel of the liner are made with LH buttress thread with trapezoidal profile turned by 180 degrees relatively to each other.

EFFECT: invention ensures possibility of multiple connection of the transporting sub with the liner funnel during the hydraulic fracture or other works, and for torque transfer to the sub during tubings or drilling pipes disconnection upon works completion.

6 dwg