dr robert,
this about the best explanation i could find, hope it makes sense
What is a doodlebugger?
A doodlebugger is someone in the seismograph business, aka petroleum exploration and oil exploration.
While some at the top end of the business--those who have their feet under the table for meals, call themselves doodlebuggers; in fact the doodlebugger is the guy out in the field getting dirty. That isn't to take anything away from those working in data processing, interpretation, and management. Everyone has a job and it takes everyone to make it work. However, for the purpose of this explanation, doodlebuggers are the field people.
Most people have no idea what a seismograph crew does, which is just as well. Farmers here in the U.S. think that seismograph crews are traveling bands of gypsy-like felons who tell them lies, promise to drill free water wells, leave gates open, tear up the pasture with their heavy equipment, then blow town in the dark of night without keeping any of their promises.
But in truth, seismograph crews do other things too. If the farmer has a daughter, she might run off with one of the jug hustlers from Laurel, Mississippi. The farmer's son may well be lured away from back-breaking farm work, only to find himself toting eight strings of geophones and a cable reel through the Atchafalaya Swamp, in South Louisiana.