ApplicationNo. 05/583053 filed on 06/02/1975
US Classes:166/361, Pipe cutting means166/365, With provision for disassembly166/55.8, Tool moved radially by fluid pressure166/98GRAPPLE AND WELL ANCHORED LIFTING MEANS
ExaminersPrimary: Purser, Ernest R.
Assistant: Favreau, Richard E.
Attorney, Agent or Firm
International ClassesE21B 29/00 (20060101)
E21B 31/00 (20060101)
E21B 31/16 (20060101)
E21B 29/12 (20060101)
AbstractThe method of and apparatus for cutting and recovering submarine surface casing and associated equipment on the ocean floor included the steps of lowering a string into the surface casing which string includes a swivel, a spear and a cutter, seating the swivel on the casing well head seat, actuating the cutter to sever the casing, setting the spear within the casing and recovering the surface casing and well head equipment associated therewith.
Field of SearchIndicating
MEANS FOR PERFORATING, WEAKENING, BENDING OR SEPARATING PIPE AT AN UNPREPARED POINT
Tool moved radially by fluid pressure
GRAPPLE AND WELL ANCHORED LIFTING MEANS
Perforating, weakening, bending or separating pipe at an unprepared point
Perforating, weakening or separating by mechanical means or abrasive fluid