Wells – Means for perforating – weakening – bending or separating pipe... – Perforating or splitting cutter
Reexamination Certificate
2008-02-22
2009-10-13
Bagnell, David J (Department: 3672)
Wells
Means for perforating, weakening, bending or separating pipe...
Perforating or splitting cutter
C166S055100, C166S298000
Reexamination Certificate
active
07600562
ABSTRACT:
An improved perforating apparatus that creates drain holes in well tubing without the use of explosives. A hydraulically-activated apparatus created from machined metal pipes and solid metal bars that form four main sections, a hollow metal pipe10, hollow metal chamber11, wedge holder12, and a wedge stop13. A drive disc14, drive wedge15, piston16, metal button17, shear screws19, and wedge holder O-rings20, a drive disc O-ring21, a piston O-ring30, and a wedge stop O-ring31complete and seal the apparatus. When perforating apparatus reaches a location to be perforated, an impact bar is manually-dropped into tubing string and hits top of the apparatus. The force of well fluid pressure on a drive disc14within the apparatus forces drive wedge15inside drive holder12to impact piston16. Impact on piston16expels button17through well tubing, creating a drain hole.
REFERENCES:
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patent: 4566544 (1986-01-01), Bagley et al.
patent: 4624307 (1986-11-01), Kinley
patent: 4632034 (1986-12-01), Colle, Jr.
patent: 5148868 (1992-09-01), Christian
Bagnell David J
Loikith Catherine
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