Secondary Formation Exposure by Drilling Perforation
Drilling perforation is another method of a secondary exposure of
oil and gas wells which is based on drilling a hole in a casing string,
cement and rock.
The equipment consists of a well device and surface control blocks,
placed in a log survey station or on a lift.
Major advantages of drilling perforators are their ability in creation
of perforated channels at the soft, sparing mode of operation without
impact influence, eliminating deformation and damages of casing strings,
creation of cracks in a cement ring and worsening of filtration rock
characteristics in a formation of a well critical area.