“DPU® Downhole Power Unit System—Economical and Dependable Setting and Retrieving for Downhole Tools,” Halliburton Company (1997) (document itself not admitted to be prior art but it discloses a prior Downpole Power Unit system). |
“SPE 26063—New Electronic Measurement System Enhances Slickline Service Capabilities,” Larimore et al., Society of Petroleum Engineers (1993). |
“OTC 7877—A Battery-Operated, Electro-Mechanical Setting Tool for Use with Bridge Plugs and Similar Wellbore Tools,” Gazda et al., Offshore Technology Conference (1995). |
“SPE 35236—Low Cost Solutions for Well Interventions Through Advanced Slickline Services,” Larimore et al., Society of Petroleum Engineers (1996). |
“Low-Cost Well Interventions With Slickline,” Live-Well Intervention (Feb. 1997). |
“World Expro 1996—The International Review of Hydrocarbon Exploration and Production Technology,” Sterling Publications Limited, article entitled “Slickline setting tool increases safety and reduces setting time for packers and bridge plugs” (1995). |