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US 2014/0110116 A1Published application
Inductive shearing of drilling pipe
AssigneeTransocean Sedco Forex Ventures Limited
InventorsGerry Ludtka, John Wilgen, Roger Kisner, Timothy Mcintyre
Life of this patent
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Abstract
Induction shearing may be used to cut a drillpipe at an undersea well. Electromagnetic rings may be built into a blow-out preventer (BOP) at the seafloor. The electromagnetic rings create a magnetic field through the drillpipe and may transfer sufficient energy to change the state of the metal drillpipe to shear the drillpipe. After shearing the drillpipe, the drillpipe may be sealed to prevent further leakage of well contents.
Claims20
An apparatus, comprising:
- an induction heating coil configured to close on a drillpipe;
- and
- an induction power supply coupled to the induction heating coil.
An apparatus, comprising:
- a clamp adjustable to open and close around a pipe;
- wires embedded in the clamp to form coils;
- and
- a power supply coupled to the wires,
- in which the power supply is configured to apply power to the wires to heat the pipe through induction to shear the pipe.
2 more elements
An apparatus, comprising:
- means for inductively shearing a drillpipe;
- and
- a power supply coupled to the inductive shearing means.
Dependencies are inferred from the claim text.