9df11f1f7372ec7bffff9031ffffe417

9df11f1f7372ec7bffff9031ffffe417 - Directional Drilling:...

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Unformatted text preview: Directional Drilling: deviation from drilling a straight hole. Drilled straight to a predetermined depth, and then gradually curved. Typical curvature: 2-3 degrees per 100 of well depth Drill stem can handle this low angle curvature enough to eventually run horizontal. Uses Offshore Development Drilling on Land Other Uses Tools and Techniques Drill Pipe Bent Sub and Downhole Motor Orienting the Hole Offshore: One of the most important uses Capability to drill multiple wells from one location Due to huge expense of constructing a platform, this enables operators to capitalize on a single investment for multiple producing wells Example: Gullfaks C platform in the North Sea Weighs 1.5 million tons Covers 4 acres Gullfaks C Platform Typical North Sea Day Rig Location on Land Pay Zones Offshore This method is much cheaper and safer than offshore drilling. Directional drilling on land has several uses: Avoiding Fault Lines Can cause problems in the hole Rig Location Rivers, Hills, Mountains and other obstructions Well orientation in the pay zone Operators have increased production by up to 10x due to horizontal well orientation. Exploration: Directional allows for deflecting off original dry holes to intersect possible pay zones. Sidetracking: Divert around a fish (object lodged in the borehole) Well Control: Killing Wild Wells Relief Well is drilled directionally to intercept the blown out well in order to kill the well by pumping mud down hole....
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9df11f1f7372ec7bffff9031ffffe417 - Directional Drilling:...

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