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US 7,093,680 B2Granted
Subsurface signal transmitting apparatus
AssigneeWeatherford/Lamb, Inc.
InventorsMarvin L. Holbert, James W. Haslett, Robert E. Smallwood, Frederick N. Trofimenkoff
Life of this patent
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Abstract
An insulator for a subsurface signal transmitting apparatus. The insulator includes a housing, a mandrel axially disposed inside the housing, a first insulating material disposed between the housing and the mandrel, a first sleeve formed of a second insulating material disposed between the housing and a first tubular member and the first tubular member coupled to the mandrel.
Claims8
An insulator for a subsurface signal transmitting apparatus, comprising:
- a housing having an inner surface which is gradually tapered;
- a mandrel axially disposed inside the housing and having an outer surface which is gradually tapered and which corresponds to the tapered surface of the housing;
- a first insulating material disposed between the housing and the mandrel;
- a first sleeve formed of a second insulating material disposed between the housing and a first tubular member;
- and
- the first tubular member coupled to the mandrel.
3 more elements
An insulator for a subsurface signal transmitting apparatus, comprising:
- a housing having an inner surface which is gradually tapered;
- a mandrel, having an outer surface which is gradually tapered and which corresponds to the tapered surface of the housing;
- a first insulating material bonding the mandrel to the housing, wherein the housing and the mandrel are configured to remain coupled in the event of failure of the first insulating material;
- and
- at least one rod disposed between the housing and the mandrel, wherein the rod is formed of a second insulating material and configured to ensure the housing and the mandrel remain rotationally coupled in the event of failure of the first insulating material.
2 more elements
Dependencies are inferred from the claim text.