crooked hole

crooked hole

[¦kru̇k·əd ¦hōl]
(petroleum engineering)
A borehole drilled at an angle, often because of steeply dipping formations; not to be confused with holes deliberately deviated from the vertical to avoid obstacles or to tap otherwise unavailable reservoirs.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in classic literature ?
A rusty padlock was fastened on the door, ends of discoloured blinds and curtains flapped drearily against the half-opened upper windows, and the crooked holes cut in the closed shutters below, were black with the darkness of the inside.
If one of the parameters of the operation is not as it should be, the result can be a crooked hole that does not run through the center of the barrel blank.
If you turn the tap into the hole crooked, it will create a crooked hole; the tap will not straighten out as it enters the hole.
You can't move the work to align the location once the bit starts cutting, as this will just result in a crooked hole. You should start all holes at a center punched location.
It was not unusual to find rough parts or crooked holes that complicated things.
Tired of crooked holes? Make this simple drilling guide from two pieces of 3/4-in.
Crooked holes have always been of concern to the exploration coring sector.