Oil Men Sink Curved Wells to Undersea Oil Deposits (Mar, 1931)
Oil Men Sink Curved Wells to Undersea Oil Deposits
INSTEAD of erecting wharves out over the water to drill for oil beneath the ocean floor, operators are now setting up their derricks on the shore and drilling out to the submarine deposits. When the vertical hole reaches the depth at which the drillers wish to alter the course seaward, they fill the hole to the branching off point and set a whipstock in place to divert the drill outward at an angle, as shown in the drawing above. This whipstock is a steel cylinder with a smooth angular upper face off which the bit slides on its new course, which it maintains with considerable consistency.