08146669 is referenced by 52 patents and cites 1186 patents.

A method for installing a horizontal or inclined subsurface heater includes placing a heating section of a heater in a horizontal or inclined section of a wellbore with an installation tool. The tool is uncoupled from the heating section. A lead in section is mechanically and electrically coupled to the heating section of the heater. The lead-in section is located in an angled or vertical section of the wellbore.

Title
Multi-step heater deployment in a subsurface formation
Application Number
12/250297
Publication Number
8146669 (B2)
Application Date
October 13, 2008
Publication Date
April 3, 2012
Inventor
Stanley Leroy Mason
Allen
TX, US
Assignee
Shell Oil Company
TX, US
IPC
E21B 23/00
View Original Source