The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1991
Filed:
Apr. 25, 1990
Joseph F Donovan, Spring, TX (US);
Donald N Yates, Jr, Palacios, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
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.