Rotary steerables- Cost, reliability still key; higher dogleg capability, downhole motor integration also on asking list

摘要

Adding to the demand for directional-control rotary steerables on land is the growing need for vertical-control tools that can keep well deviation below 0.5° or 1°. These tools allow the driller to place a higher weight on bit to increase ROP without having to worry about deviating from vertical, Mr Sutherland said. "If you can drill a very straight and smooth vertical portion, you don't have to deal with a lot of torque and drag issues that can hurt your ability to drill your curve and extend your laterals," he remarked. Interestingly enough, the vertical-control market that started onshore is also shifting to offshore, particularly in deepwater, where true verticality can be very desirable, Mr Williams said.