Although oil and gas exploration has been going on in East Africa for decades, until recently exploration activities grew more slowly compared to other regions in Africa. Today, there has been a series of oil and gas discoveries in several East African countries, including Kenya, Madagascar,...

1. Background 2. A Rubber Experiment and the Constitutive Model 3. Mechanical Behavior and Sealing Performance of the Rubber Sealing Rings 4. Metal-rubber Sealing Structure in the Roller Cone Bit 5. Stator Rubber of the Positive Displacement Motor (PDM) 6. Sealing Structure of the Pump 7....