Electrically insulating gap subassembly for downhole electromagnetic transmission
AssigneeHalliburton Energy Services, Inc.
InventorsPaul D. Ringgenberg, Harrison C. Smith
Life of this patent
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Abstract
An electrically insulating gap subassembly for inclusion in a pipe string (30) comprising a pair of tubular members (90, 98) having an electrically insulating isolation subassembly (94) threadably disposed therebetween is disclosed. The electrically insulating isolation subassembly (94) has an anodized aluminum surface that provides electrical isolation to interrupt electrical contact between the two tubular members (90, 98) such that electromagnetic waves (46, 54) carrying information may be generated thereacross.
Claims31
An electrically insulating gap subassembly for inclusion in a pipe string comprising:
- a first tubular member having a threaded end connector;
- a second tubular member having a threaded end connector;
- an electrically insulating isolation subassembly having first and second threaded end connectors, the first threaded end connector of the isolation subassembly threadably coupled to the threaded end connector of the first tubular member and the second threaded end connector of the isolation subassembly threadably coupled to the threaded end connector of the second tubular member;
- and
- first and second electrically insulating members disposed respectively between the isolation subassembly and the first and second tubular members.
An electrically insulating gap subassembly for inclusion in a pipe string comprising:
- a first tubular member having a threaded end connector;
- a second tubular member having a threaded end connector;
- an electrically insulating isolation subassembly having first and second threaded end connectors, the first threaded end connector of the electrically insulating isolation subassembly threadably coupled to the threaded end connector of the first tubular member and the second threaded end connector of the electrically insulating isolation subassembly threadably coupled to the threaded end connector of the second tubular member, wherein the electrically insulating isolation subassembly is made of aluminum;
- an outer sleeve disposed exteriorly about the electrically insulating isolation subassembly;
- and
- an inner sleeve disposed interiorly within the electrically insulating isolation subassembly, wherein the inner sleeve is fiberglass.
Dependencies are inferred from the claim text.