Well penetration apparatus
This patent describes a punch member for providing an opening in a heavy workpiece such as a metal tube or sheet. The punch member consists of an elongated member having a generally cylindrical outer surface and curved cutting edge surfaces on one end of the generally cylindrical outer surface for initiating the provision of an opening and partially cutting such an opening in a metal workpiece such as a tube or sheet when urged axially thereagainst and longitudinal grooves bearing axes parallel to the axis of the punch member and intersecting and extending inwardly from the curved cutting edge surfaces for completing the opening by bending back tab portions of the workpiece on opposite sides of the opening in response to further axial movement of the punch member to complete the opening without severing any part of the workpiece moved to form the opening from the remaining portion of the workpiece.
- Assignee:
- NOV; NOV-89-034074; EDB-89-024568
- Patent Number(s):
- US 4765173
- OSTI ID:
- 6543051
- Resource Relation:
- Patent File Date: Filed date 21 Aug 1986
- Country of Publication:
- United States
- Language:
- English
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03 NATURAL GAS
CUTTING TOOLS
DRILL PIPES
CUTTING
APERTURES
NATURAL GAS WELLS
OIL WELLS
SHEETS
TUBES
WELL COMPLETION
DRILLING EQUIPMENT
EQUIPMENT
MACHINING
OPENINGS
PIPES
TOOLS
WELLS
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