Patent ID: 7069993
Filing Date: 2006-07-04
Classification: E21B,H01R

Abstract:
1. An apparatus for heating a segment of oil and gas well bores and surrounding strata comprising: an electrical resistance heating rod; electrical cable for carrying electrical current from an electrical current source outside of the well bore to said electrical resistance heating rod when positioned inside of said well bore; a protective block in which is embedded a first and second connector pin, where said first pin joins said electrical cable to said second pin and said second pin joins said heating rod to said first pin, said protective block being constructed of a moldable material which, when cured, is substantially impervious to pressure and chemical permeation and oil and gas well bore bottom pressures and environments; a metallic encasement member encasing said protective block and sealably welded to form a substantially impervious enclosure with said block and said embedded portion of said heating rod and said electrical cable therein, except that said metallic encasement admits said electrical cable and said heating rod there into for attachment; a perforated production tubing segment, a proximal perforated production tubing segment end of which is reversibly engageable to a distal terminus of oil or gas well production tubing string and a distal perforated production tubing segment end of which is engageable with said metallic encasement member; and a heating rod support frame which extends from said metallic encasement means opposite its engagement with said perforated production tubing segment and in which a portion of said heating rod is supported.