DEVICE FOR ORIENTATION OF BOREHOLE PERFORATOR Russian patent published in 2020 - IPC E21B43/119 E21B47/24 

FIELD: mining.

SUBSTANCE: invention relates to secondary opening of productive formations in cased wells, in particular to hydro-sand jet perforators. Device for orientation of borehole perforator includes orientation unit containing adapter with mounting seat, and control unit. Control unit consists of a case, a support unit, a sensor unit and a cable. Case includes a body for arrangement of a unit of sensors with connecting elements in the internal space, a cover and a master for orientation of a case with a sensor unit relative to the adapter. Support unit is fixed to the case body by means of a threaded connection. Holder is movably connected to a cable which is connected to a geophysical station by means of a fork. Sensor unit includes a platform-free inertial navigation system based on microelectromechanical systems and a non-contact reed switch. Said adapter consists of case and rotary tip connected by means of split clamping ring. In the case of the adapter there is a plug with a magnet and two replaceable pins for turning the master plate. Plug with the magnet is placed so that when the contactless reed switch is installed opposite the magnet, an electrical signal is generated and transmitted to the surface via a geophysical cable.

EFFECT: increased accuracy of perforator orientation in well, simplified design of device and perforator orientation process.

1 cl, 2 dwg