Directional drilling system and method for drilling precise offset wellbores from a main wellbore
Permanent whipstock and placement method
Coring with tubing run tools from a producing well Patent #: 5211715
ApplicationNo. 958639 filed on 10/09/1992
US Classes:166/117.5MEANS FOR GUIDING INSERTABLE ELEMENT LATERALLY OF WELL AXIS (E.G., WHIPSTOCK)
ExaminersPrimary: Bui, Thuy M.
Attorney, Agent or Firm
International ClassE21B 033/00
AbstractA method for forming a window in a subsurface well conduit using a coiled tubing unit together with standard rotary rig tools adopted for use with a coiled tubing unit, and a whipstock with no wear projection on the guide surface thereof, and controlling the angular relationship between the tools and the whipstock while forming the window.
Field of SearchMEANS FOR GUIDING INSERTABLE ELEMENT LATERALLY OF WELL AXIS (E.G., WHIPSTOCK)
Perforating, weakening, bending or separating pipe at an unprepared point
Perforating, weakening or separating by mechanical means or abrasive fluid
MEANS FOR PERFORATING, WEAKENING, BENDING OR SEPARATING PIPE AT AN UNPREPARED POINT
Boring curved or redirected bores