Show deviation serious problem to fo driller oil u well e ll 11 dr driller illers have many drobil problems lern s e them on every job 0 b and one of f the most serious lq is deviation or or crooked hole the weight of 0 a string of 0 drill elpe pipe tends to keep the hole vertical but u t when the drill bit strikes a wall of f rock lying at an angle to the surface it tends to sheer off or dig in depending on the angle either way the hole must be straightened it sounds impossible but it Is an everyday chore in an oil field on the colorado plateau after the driller finds the degree and direction of the deviation 0 n he has a number of tricks h he c can a n try lie ile can reduce or increase weight on the drill bit he can use an extra heavy drill pipe to add weight and rigidity or as a last resort he can use a this Is a long thin wedge into the drill hole one side of steel big enough to fit snugly of the wedge is perpendicular to the base like a right tr triangle la ng I 1 e with the opposite side sloping at an angle it Is placed at the bottom of the hole so that the slope Is counter to the unwanted angle in the hole since the drill cannot force its way into the steel it takes the only alternate course straight down h I 1 Is where the driller wants it to go A fully equipped drilling rig I 1 weighs about tons and costs at least |