Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate
2005-03-15
2005-03-15
Hewitt, James M. (Department: 3679)
Pipe joints or couplings
Particular interface
Tapered
C285S009100, C285S332100, C175S040000, C166S066500, C340S854400, C340S854500, C340S854600, C367S082000, C439S950000
Reexamination Certificate
active
06866306
ABSTRACT:
A first flux-loop inductive coupler element electrically couples with a second flux-loop inductive coupler element. The first flux-loop inductive coupler element comprises a first ring-like core having high magnetic permeability and a conical-section annular first face transverse to the plane of the first core. The first face has a first annular groove separating a first conical-section larger-diameter face and a first conical-section smaller-diameter face. A first coil is wound within the annular groove. The first and second cores form a low-reluctance closed magnetic path around the first coil and a second coil of the second flux-loop inductive coupler element.A first current-loop inductive coupler element electrically couples with a second current-loop inductive coupler element. The first current-loop inductive coupler element has a first high-conductivity, low-permeability shaped belt of a first end of a first pipe joint, a first ring-like core located at the first end, and a first electrically conductive coil wound about the first ring-like core. The first high-conductivity, low-permeability shaped belt partially encloses the first coil. It is shaped to cooperate with the second high-conductivity, low-permeability shaped belt of an adjacent second pipe joint having a second electrically conductive coil and a second high-conductivity, low-permeability shaped belt to create a closed toroidal electrical conducting path. The closed toroidal electrical conducting path encloses the first coil and the second coil when the first and second pipe joints are mated.
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Boyle Bruce W.
Jundt Jacques
Madhavan Raghu
Batzer William B.
Gaudier Dale
Hewitt James M.
Lee John L.
Schlumberger Technology Corporation
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