ELECTROMAGNETIC WELLBORE TELEMETRY SYSTEM FOR TUBULAR STRINGS
First Claim
1. A coaxial transmission line for an electromagnetic wellbore telemetry system, comprising:
- an outer conductive pipe;
an inner conductive pipe disposed coaxially inside an axial bore of the outer conductive pipe;
a first electrical contact having a first contact face disposed at a first end of the inner conductive pipe;
a second electrical contact having a second contact face disposed at a second end of the inner conductive pipe, wherein at least one of the first and second contact faces includes at least one slot; and
an insulator disposed between the outer conductive pipe and the inner conductive pipe.
2 Assignments
0 Petitions
Accused Products
Abstract
A coaxial transmission line for an electromagnetic wellbore telemetry system comprises an outer conductive pipe, an inner conductive pipe disposed coaxially inside an axial bore of the outer conductive pipe, a first electrical contact having a first contact face disposed at a first end of the inner conductive pipe, a second electrical contact having a second contact face disposed at a second end of the inner conductive pipe, wherein at least one of the first and second contact faces includes at least one slot, and an insulator disposed between the outer conductive pipe and the inner conductive pipe.
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Citations
40 Claims
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1. A coaxial transmission line for an electromagnetic wellbore telemetry system, comprising:
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an outer conductive pipe; an inner conductive pipe disposed coaxially inside an axial bore of the outer conductive pipe; a first electrical contact having a first contact face disposed at a first end of the inner conductive pipe; a second electrical contact having a second contact face disposed at a second end of the inner conductive pipe, wherein at least one of the first and second contact faces includes at least one slot; and an insulator disposed between the outer conductive pipe and the inner conductive pipe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A coaxial transmission line for an electromagnetic wellbore telemetry system, comprising:
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an outer conductive pipe; a perforated or slotted inner conductive pipe disposed coaxially inside an axial bore of the outer conductive pipe; a first electrical contact having a first contact face disposed at a first end of the inner conductive pipe; a second electrical contact having a second contact face disposed at a second end of the inner conductive pipe; and an insulator disposed between the outer conductive pipe and the inner conductive pipe. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. An electromagnetic wellbore telemetry system, comprising:
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a plurality of coaxial transmission lines coupled together in the form of a tubular string for an oilfield operation, each coaxial transmission line comprising; an outer conductive pipe; an inner conductive pipe disposed coaxially inside an axial bore of the outer conductive pipe; a first electrical contact having a first contact face disposed at a first end of the inner conductive pipe; a second electrical contact having a second contact face disposed at a second end of the inner conductive pipe, wherein at least one of the first and second contact faces includes at least one slot; and an insulator disposed between the outer conductive pipe and the inner conductive pipe. - View Dependent Claims (26, 27, 28)
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29. An electromagnetic wellbore telemetry system, comprising:
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a plurality of coaxial transmission lines connected in the form of a tubular string for an oilfield operation, each coaxial transmission line comprising; an outer conductive pipe; a perforated or slotted inner conductive pipe disposed coaxially inside an axial bore of the outer conductive pipe; a first contact disposed at a first end of the inner conductive pipe; a second contact disposed at a second end of the inner conductive pipe; and an insulator disposed between the outer conductive pipe and the inner conductive pipe.
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30. A method of making a coaxial transmission line for an electromagnetic wellbore telemetry system, comprising:
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attaching first and second electrical contacts to distal ends of an inner conductive pipe; applying an insulator on the outer surface of the inner conductive pipe; inserting the inner conductive pipe and insulator into an outer conductive pipe; and expanding the inner conductive pipe to conform the inner conductive pipe to the inner geometry of the outer conductive pipe. - View Dependent Claims (31, 32, 33, 34, 35)
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36. A method of making a coaxial transmission line for an electromagnetic wellbore telemetry system, comprising:
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attaching first and second electrical contacts to distal ends of an inner conductive pipe; arranging an outer conductive pipe coaxially with the inner conductive pipe; and disposing an insulator between the inner conductive pipe and the outer conductive pipe. - View Dependent Claims (37, 38, 39)
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40. A method of providing communication between a downhole tool in a wellbore penetrating an underground formation and a surface unit, comprising:
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connecting a plurality of coaxial transmission lines together, each coaxial transmission line comprising an outer conductive pipe, an inner conductive pipe disposed coaxially inside an axial bore of the outer conductive pipe, a first electrical contact having a first contact face disposed at a first end of the inner conductive pipe, a second electrical contact having a second contact face disposed at a second end of the inner conductive pipe, and an insulator disposed between the outer conductive pipe and the inner conductive pipe, wherein at least one of the first and second contact faces includes at least one slot; coupling the plurality of coaxial transmission lines to the downhole tool; and establishing communication between the coaxial transmission lines and the surface unit.
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Specification