Boring or penetrating the earth – With heating or cooling drilling fluid
Patent
1990-04-25
1991-05-21
Novosad, Stephen J.
Boring or penetrating the earth
With heating or cooling drilling fluid
166302, 166312, 166 57, 175 452, 175 454, E21B 3600, E21B 2114, E21B 41116
Patent
active
050167162
ABSTRACT:
An insulation jacket and method are provided for a tubing carried perforating gun for a subterranean well. A tubular housing is secured at one end to a tubular conduit with a firing head disposed interiorly within the housing. A perforating gun is activated by the firing head and carried by the housing. A tubular heat shield is concentrically disposed around the exterior of the housing and is sealingly secured relative to an end of the housing. An annular area is defined between the interior of the heat shield and the exterior of the housing with a fluid passageway extending from the interior of the housing through the annular area and communicating with the exterior of the heat shield. The heat shield configuration may also be utilized to provide an annular wash area for washing particulate matter away from the perforating gun as it is being introduced into the well. A cooling fluid may be introduced into the well during or incremental to running of the tubing into the well and circulated through the fluid passageway.
REFERENCES:
patent: 4436155 (1984-03-01), Brieger
Donovan Joseph F.
Yates, Jr. Donald N.
Baker Hughes Incorporated
Novosad Stephen J.
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